/usr/bin/java -Xmx16000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s /storage/repos/CAV22/benchmarks/svcomp-Reach-32bit-Automizer_Default.epf --traceabstraction.order.of.the.error.locations.to.be.checked INSUFFICIENT_FIRST -tc /storage/repos/CAV22/benchmarks/AutomizerCInline.xml -i /storage/repos/CAV22/benchmarks/increased_bounds/weaver_chl-file-item-subst.wvr_bound2.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-19404b3-m [2023-08-04 02:02:57,961 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-08-04 02:02:58,004 INFO L114 SettingsManager]: Loading settings from /storage/repos/CAV22/benchmarks/svcomp-Reach-32bit-Automizer_Default.epf [2023-08-04 02:02:58,007 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-08-04 02:02:58,007 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-08-04 02:02:58,008 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Translation Mode: [2023-08-04 02:02:58,008 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Checked method. Library mode if empty. [2023-08-04 02:02:58,034 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-04 02:02:58,034 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-04 02:02:58,039 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-04 02:02:58,039 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-04 02:02:58,040 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-04 02:02:58,040 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-04 02:02:58,041 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-08-04 02:02:58,042 INFO L153 SettingsManager]: * Use SBE=true [2023-08-04 02:02:58,042 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-04 02:02:58,042 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-04 02:02:58,042 INFO L153 SettingsManager]: * sizeof long=4 [2023-08-04 02:02:58,042 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-04 02:02:58,042 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-08-04 02:02:58,043 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-08-04 02:02:58,043 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-04 02:02:58,043 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-04 02:02:58,043 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-04 02:02:58,043 INFO L153 SettingsManager]: * sizeof long double=12 [2023-08-04 02:02:58,044 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-08-04 02:02:58,044 INFO L153 SettingsManager]: * Use constant arrays=true [2023-08-04 02:02:58,044 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-04 02:02:58,045 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-04 02:02:58,045 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-04 02:02:58,045 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-04 02:02:58,046 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-04 02:02:58,046 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-04 02:02:58,046 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-04 02:02:58,046 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-04 02:02:58,046 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-04 02:02:58,046 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-04 02:02:58,046 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-08-04 02:02:58,046 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-04 02:02:58,047 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-04 02:02:58,047 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-04 02:02:58,047 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Order of the error locations to be checked -> INSUFFICIENT_FIRST [2023-08-04 02:02:58,215 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-04 02:02:58,228 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-04 02:02:58,230 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-04 02:02:58,231 INFO L270 PluginConnector]: Initializing CDTParser... [2023-08-04 02:02:58,231 INFO L274 PluginConnector]: CDTParser initialized [2023-08-04 02:02:58,232 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/CAV22/benchmarks/increased_bounds/weaver_chl-file-item-subst.wvr_bound2.c [2023-08-04 02:02:59,223 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-08-04 02:02:59,362 INFO L384 CDTParser]: Found 1 translation units. [2023-08-04 02:02:59,363 INFO L180 CDTParser]: Scanning /storage/repos/CAV22/benchmarks/increased_bounds/weaver_chl-file-item-subst.wvr_bound2.c [2023-08-04 02:02:59,370 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/556294435/be6983c27498464da205b3cd82783073/FLAGd798af4db [2023-08-04 02:02:59,385 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/556294435/be6983c27498464da205b3cd82783073 [2023-08-04 02:02:59,390 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-04 02:02:59,394 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-08-04 02:02:59,398 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-04 02:02:59,399 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-04 02:02:59,402 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-04 02:02:59,402 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.08 02:02:59" (1/1) ... [2023-08-04 02:02:59,403 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3f50a839 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 02:02:59, skipping insertion in model container [2023-08-04 02:02:59,403 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.08 02:02:59" (1/1) ... [2023-08-04 02:02:59,432 INFO L176 MainTranslator]: Built tables and reachable declarations [2023-08-04 02:02:59,580 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-file-item-subst.wvr_bound2.c[3258,3271] [2023-08-04 02:02:59,584 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-04 02:02:59,592 INFO L201 MainTranslator]: Completed pre-run [2023-08-04 02:02:59,613 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-file-item-subst.wvr_bound2.c[3258,3271] [2023-08-04 02:02:59,615 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-04 02:02:59,626 INFO L206 MainTranslator]: Completed translation [2023-08-04 02:02:59,626 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 02:02:59 WrapperNode [2023-08-04 02:02:59,626 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-04 02:02:59,627 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-04 02:02:59,627 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-04 02:02:59,627 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-04 02:02:59,633 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 02:02:59" (1/1) ... [2023-08-04 02:02:59,640 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 02:02:59" (1/1) ... [2023-08-04 02:02:59,659 INFO L138 Inliner]: procedures = 23, calls = 31, calls flagged for inlining = 9, calls inlined = 13, statements flattened = 254 [2023-08-04 02:02:59,660 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-04 02:02:59,660 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-04 02:02:59,660 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-04 02:02:59,661 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-08-04 02:02:59,667 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 02:02:59" (1/1) ... [2023-08-04 02:02:59,667 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 02:02:59" (1/1) ... [2023-08-04 02:02:59,670 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 02:02:59" (1/1) ... [2023-08-04 02:02:59,670 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 02:02:59" (1/1) ... [2023-08-04 02:02:59,676 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 02:02:59" (1/1) ... [2023-08-04 02:02:59,680 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 02:02:59" (1/1) ... [2023-08-04 02:02:59,681 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 02:02:59" (1/1) ... [2023-08-04 02:02:59,682 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 02:02:59" (1/1) ... [2023-08-04 02:02:59,685 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-04 02:02:59,685 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-04 02:02:59,685 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-08-04 02:02:59,686 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-08-04 02:02:59,686 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 02:02:59" (1/1) ... [2023-08-04 02:02:59,692 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-04 02:02:59,701 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 02:02:59,726 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-08-04 02:02:59,734 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-08-04 02:02:59,757 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-04 02:02:59,758 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-08-04 02:02:59,758 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-08-04 02:02:59,758 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-08-04 02:02:59,758 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-08-04 02:02:59,758 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2023-08-04 02:02:59,758 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2023-08-04 02:02:59,758 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-04 02:02:59,758 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-04 02:02:59,758 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-04 02:02:59,758 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-04 02:02:59,760 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-04 02:02:59,760 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-04 02:02:59,760 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-04 02:02:59,762 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-08-04 02:02:59,868 INFO L236 CfgBuilder]: Building ICFG [2023-08-04 02:02:59,869 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-04 02:03:00,229 INFO L277 CfgBuilder]: Performing block encoding [2023-08-04 02:03:00,236 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-04 02:03:00,236 INFO L302 CfgBuilder]: Removed 6 assume(true) statements. [2023-08-04 02:03:00,238 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.08 02:03:00 BoogieIcfgContainer [2023-08-04 02:03:00,238 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-04 02:03:00,240 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-04 02:03:00,240 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-08-04 02:03:00,242 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-08-04 02:03:00,243 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 04.08 02:02:59" (1/3) ... [2023-08-04 02:03:00,243 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@36b2f691 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.08 02:03:00, skipping insertion in model container [2023-08-04 02:03:00,243 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 02:02:59" (2/3) ... [2023-08-04 02:03:00,243 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@36b2f691 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.08 02:03:00, skipping insertion in model container [2023-08-04 02:03:00,243 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.08 02:03:00" (3/3) ... [2023-08-04 02:03:00,244 INFO L112 eAbstractionObserver]: Analyzing ICFG weaver_chl-file-item-subst.wvr_bound2.c [2023-08-04 02:03:00,250 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-08-04 02:03:00,256 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-04 02:03:00,256 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-08-04 02:03:00,256 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-04 02:03:00,400 INFO L144 ThreadInstanceAdder]: Constructed 9 joinOtherThreadTransitions. [2023-08-04 02:03:00,434 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 260 places, 288 transitions, 618 flow [2023-08-04 02:03:00,643 INFO L124 PetriNetUnfolderBase]: 132/934 cut-off events. [2023-08-04 02:03:00,643 INFO L125 PetriNetUnfolderBase]: For 36/40 co-relation queries the response was YES. [2023-08-04 02:03:00,662 INFO L83 FinitePrefix]: Finished finitePrefix Result has 995 conditions, 934 events. 132/934 cut-off events. For 36/40 co-relation queries the response was YES. Maximal size of possible extension queue 30. Compared 5746 event pairs, 0 based on Foata normal form. 0/792 useless extension candidates. Maximal degree in co-relation 499. Up to 16 conditions per place. [2023-08-04 02:03:00,662 INFO L82 GeneralOperation]: Start removeDead. Operand has 260 places, 288 transitions, 618 flow [2023-08-04 02:03:00,672 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 260 places, 288 transitions, 618 flow [2023-08-04 02:03:00,675 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-04 02:03:00,683 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 260 places, 288 transitions, 618 flow [2023-08-04 02:03:00,686 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 260 places, 288 transitions, 618 flow [2023-08-04 02:03:00,686 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 260 places, 288 transitions, 618 flow [2023-08-04 02:03:00,845 INFO L124 PetriNetUnfolderBase]: 132/934 cut-off events. [2023-08-04 02:03:00,845 INFO L125 PetriNetUnfolderBase]: For 36/40 co-relation queries the response was YES. [2023-08-04 02:03:00,853 INFO L83 FinitePrefix]: Finished finitePrefix Result has 995 conditions, 934 events. 132/934 cut-off events. For 36/40 co-relation queries the response was YES. Maximal size of possible extension queue 30. Compared 5746 event pairs, 0 based on Foata normal form. 0/792 useless extension candidates. Maximal degree in co-relation 499. Up to 16 conditions per place. [2023-08-04 02:03:00,887 INFO L119 LiptonReduction]: Number of co-enabled transitions 33528 [2023-08-04 02:03:07,687 INFO L134 LiptonReduction]: Checked pairs total: 37799 [2023-08-04 02:03:07,687 INFO L136 LiptonReduction]: Total number of compositions: 323 [2023-08-04 02:03:07,704 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-04 02:03:07,708 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;@6d86616a, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-04 02:03:07,708 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2023-08-04 02:03:07,711 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-04 02:03:07,711 INFO L124 PetriNetUnfolderBase]: 0/26 cut-off events. [2023-08-04 02:03:07,711 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 02:03:07,712 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 02:03:07,712 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2023-08-04 02:03:07,712 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-04 02:03:07,715 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 02:03:07,715 INFO L85 PathProgramCache]: Analyzing trace with hash 772770750, now seen corresponding path program 1 times [2023-08-04 02:03:07,720 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 02:03:07,721 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1139702060] [2023-08-04 02:03:07,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 02:03:07,721 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 02:03:07,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-04 02:03:07,788 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-04 02:03:07,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-04 02:03:07,813 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-04 02:03:07,814 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-04 02:03:07,814 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (2 of 3 remaining) [2023-08-04 02:03:07,815 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 3 remaining) [2023-08-04 02:03:07,816 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 3 remaining) [2023-08-04 02:03:07,816 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-04 02:03:07,816 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-04 02:03:07,817 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE,UNKNOWN,UNKNOWN (1/2) [2023-08-04 02:03:07,818 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-04 02:03:07,818 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-08-04 02:03:07,868 INFO L144 ThreadInstanceAdder]: Constructed 18 joinOtherThreadTransitions. [2023-08-04 02:03:07,872 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 383 places, 432 transitions, 954 flow [2023-08-04 02:03:08,881 INFO L124 PetriNetUnfolderBase]: 1054/5405 cut-off events. [2023-08-04 02:03:08,882 INFO L125 PetriNetUnfolderBase]: For 602/602 co-relation queries the response was YES. [2023-08-04 02:03:08,966 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6079 conditions, 5405 events. 1054/5405 cut-off events. For 602/602 co-relation queries the response was YES. Maximal size of possible extension queue 120. Compared 48088 event pairs, 22 based on Foata normal form. 0/4595 useless extension candidates. Maximal degree in co-relation 3224. Up to 192 conditions per place. [2023-08-04 02:03:08,966 INFO L82 GeneralOperation]: Start removeDead. Operand has 383 places, 432 transitions, 954 flow [2023-08-04 02:03:08,997 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 383 places, 432 transitions, 954 flow [2023-08-04 02:03:08,997 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-04 02:03:08,998 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 383 places, 432 transitions, 954 flow [2023-08-04 02:03:08,998 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 383 places, 432 transitions, 954 flow [2023-08-04 02:03:08,998 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 383 places, 432 transitions, 954 flow [2023-08-04 02:03:10,084 INFO L124 PetriNetUnfolderBase]: 1054/5405 cut-off events. [2023-08-04 02:03:10,084 INFO L125 PetriNetUnfolderBase]: For 602/602 co-relation queries the response was YES. [2023-08-04 02:03:10,154 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6079 conditions, 5405 events. 1054/5405 cut-off events. For 602/602 co-relation queries the response was YES. Maximal size of possible extension queue 120. Compared 48088 event pairs, 22 based on Foata normal form. 0/4595 useless extension candidates. Maximal degree in co-relation 3224. Up to 192 conditions per place. [2023-08-04 02:03:10,326 INFO L119 LiptonReduction]: Number of co-enabled transitions 107448 [2023-08-04 02:03:19,327 INFO L134 LiptonReduction]: Checked pairs total: 131244 [2023-08-04 02:03:19,328 INFO L136 LiptonReduction]: Total number of compositions: 508 [2023-08-04 02:03:19,330 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-04 02:03:19,330 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;@6d86616a, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-04 02:03:19,331 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2023-08-04 02:03:19,338 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-04 02:03:19,338 INFO L124 PetriNetUnfolderBase]: 10/104 cut-off events. [2023-08-04 02:03:19,338 INFO L125 PetriNetUnfolderBase]: For 15/15 co-relation queries the response was YES. [2023-08-04 02:03:19,339 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 02:03:19,339 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1] [2023-08-04 02:03:19,339 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-04 02:03:19,339 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 02:03:19,339 INFO L85 PathProgramCache]: Analyzing trace with hash 259186298, now seen corresponding path program 1 times [2023-08-04 02:03:19,339 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 02:03:19,340 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1565509860] [2023-08-04 02:03:19,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 02:03:19,340 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 02:03:19,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 02:03:19,468 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-04 02:03:19,469 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 02:03:19,469 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1565509860] [2023-08-04 02:03:19,469 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1565509860] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 02:03:19,470 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 02:03:19,470 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-04 02:03:19,470 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1844790973] [2023-08-04 02:03:19,471 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 02:03:19,476 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 02:03:19,480 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 02:03:19,495 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 02:03:19,496 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-04 02:03:19,523 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 382 out of 940 [2023-08-04 02:03:19,529 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 62 transitions, 214 flow. Second operand has 5 states, 5 states have (on average 383.6) internal successors, (1918), 5 states have internal predecessors, (1918), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:03:19,529 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 02:03:19,529 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 382 of 940 [2023-08-04 02:03:19,530 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 02:03:24,461 INFO L124 PetriNetUnfolderBase]: 21630/33355 cut-off events. [2023-08-04 02:03:24,461 INFO L125 PetriNetUnfolderBase]: For 6657/6657 co-relation queries the response was YES. [2023-08-04 02:03:24,501 INFO L83 FinitePrefix]: Finished finitePrefix Result has 68954 conditions, 33355 events. 21630/33355 cut-off events. For 6657/6657 co-relation queries the response was YES. Maximal size of possible extension queue 760. Compared 221578 event pairs, 11780 based on Foata normal form. 729/31459 useless extension candidates. Maximal degree in co-relation 27557. Up to 30577 conditions per place. [2023-08-04 02:03:24,528 INFO L140 encePairwiseOnDemand]: 934/940 looper letters, 23 selfloop transitions, 5 changer transitions 33/66 dead transitions. [2023-08-04 02:03:24,529 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 66 transitions, 332 flow [2023-08-04 02:03:24,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-04 02:03:24,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-04 02:03:24,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1970 transitions. [2023-08-04 02:03:24,543 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41914893617021276 [2023-08-04 02:03:24,544 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1970 transitions. [2023-08-04 02:03:24,544 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1970 transitions. [2023-08-04 02:03:24,547 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 02:03:24,549 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1970 transitions. [2023-08-04 02:03:24,555 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 394.0) internal successors, (1970), 5 states have internal predecessors, (1970), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:03:24,563 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 940.0) internal successors, (5640), 6 states have internal predecessors, (5640), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:03:24,565 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 940.0) internal successors, (5640), 6 states have internal predecessors, (5640), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:03:24,566 INFO L175 Difference]: Start difference. First operand has 56 places, 62 transitions, 214 flow. Second operand 5 states and 1970 transitions. [2023-08-04 02:03:24,567 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 66 transitions, 332 flow [2023-08-04 02:03:24,576 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 66 transitions, 324 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-04 02:03:24,577 INFO L231 Difference]: Finished difference. Result has 57 places, 29 transitions, 105 flow [2023-08-04 02:03:24,578 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=940, PETRI_DIFFERENCE_MINUEND_FLOW=196, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=105, PETRI_PLACES=57, PETRI_TRANSITIONS=29} [2023-08-04 02:03:24,581 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 1 predicate places. [2023-08-04 02:03:24,581 INFO L495 AbstractCegarLoop]: Abstraction has has 57 places, 29 transitions, 105 flow [2023-08-04 02:03:24,582 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 383.6) internal successors, (1918), 5 states have internal predecessors, (1918), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:03:24,582 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 02:03:24,582 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1] [2023-08-04 02:03:24,582 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-08-04 02:03:24,582 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-04 02:03:24,582 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 02:03:24,582 INFO L85 PathProgramCache]: Analyzing trace with hash -1289536131, now seen corresponding path program 1 times [2023-08-04 02:03:24,582 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 02:03:24,583 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1556938615] [2023-08-04 02:03:24,583 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 02:03:24,583 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 02:03:24,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 02:03:24,639 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-08-04 02:03:24,639 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 02:03:24,640 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1556938615] [2023-08-04 02:03:24,640 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1556938615] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 02:03:24,640 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 02:03:24,640 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-04 02:03:24,640 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1490309705] [2023-08-04 02:03:24,640 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 02:03:24,640 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 02:03:24,640 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 02:03:24,641 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 02:03:24,641 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-04 02:03:24,648 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 383 out of 940 [2023-08-04 02:03:24,649 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 29 transitions, 105 flow. Second operand has 3 states, 3 states have (on average 385.0) internal successors, (1155), 3 states have internal predecessors, (1155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:03:24,649 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 02:03:24,649 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 383 of 940 [2023-08-04 02:03:24,650 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 02:03:25,276 INFO L124 PetriNetUnfolderBase]: 1984/3137 cut-off events. [2023-08-04 02:03:25,276 INFO L125 PetriNetUnfolderBase]: For 334/334 co-relation queries the response was YES. [2023-08-04 02:03:25,280 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6656 conditions, 3137 events. 1984/3137 cut-off events. For 334/334 co-relation queries the response was YES. Maximal size of possible extension queue 101. Compared 15221 event pairs, 1498 based on Foata normal form. 1/3059 useless extension candidates. Maximal degree in co-relation 2832. Up to 2957 conditions per place. [2023-08-04 02:03:25,285 INFO L140 encePairwiseOnDemand]: 937/940 looper letters, 23 selfloop transitions, 2 changer transitions 0/30 dead transitions. [2023-08-04 02:03:25,286 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 30 transitions, 156 flow [2023-08-04 02:03:25,286 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 02:03:25,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 02:03:25,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1174 transitions. [2023-08-04 02:03:25,289 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41631205673758864 [2023-08-04 02:03:25,289 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1174 transitions. [2023-08-04 02:03:25,289 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1174 transitions. [2023-08-04 02:03:25,290 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 02:03:25,290 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1174 transitions. [2023-08-04 02:03:25,292 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 391.3333333333333) internal successors, (1174), 3 states have internal predecessors, (1174), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:03:25,296 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 940.0) internal successors, (3760), 4 states have internal predecessors, (3760), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:03:25,297 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 940.0) internal successors, (3760), 4 states have internal predecessors, (3760), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:03:25,297 INFO L175 Difference]: Start difference. First operand has 57 places, 29 transitions, 105 flow. Second operand 3 states and 1174 transitions. [2023-08-04 02:03:25,297 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 30 transitions, 156 flow [2023-08-04 02:03:25,299 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 43 places, 30 transitions, 151 flow, removed 2 selfloop flow, removed 1 redundant places. [2023-08-04 02:03:25,299 INFO L231 Difference]: Finished difference. Result has 43 places, 28 transitions, 99 flow [2023-08-04 02:03:25,299 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=940, PETRI_DIFFERENCE_MINUEND_FLOW=95, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=28, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=99, PETRI_PLACES=43, PETRI_TRANSITIONS=28} [2023-08-04 02:03:25,300 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, -13 predicate places. [2023-08-04 02:03:25,300 INFO L495 AbstractCegarLoop]: Abstraction has has 43 places, 28 transitions, 99 flow [2023-08-04 02:03:25,301 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 385.0) internal successors, (1155), 3 states have internal predecessors, (1155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:03:25,301 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 02:03:25,301 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 02:03:25,301 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-08-04 02:03:25,301 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-04 02:03:25,301 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 02:03:25,301 INFO L85 PathProgramCache]: Analyzing trace with hash -1787765762, now seen corresponding path program 1 times [2023-08-04 02:03:25,302 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 02:03:25,302 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [886933760] [2023-08-04 02:03:25,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 02:03:25,302 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 02:03:25,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 02:03:25,372 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-08-04 02:03:25,372 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 02:03:25,372 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [886933760] [2023-08-04 02:03:25,372 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [886933760] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 02:03:25,373 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1244862554] [2023-08-04 02:03:25,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 02:03:25,373 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 02:03:25,373 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 02:03:25,397 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 02:03:25,469 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-08-04 02:03:25,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 02:03:25,551 INFO L262 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-04 02:03:25,554 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 02:03:25,596 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-08-04 02:03:25,596 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 02:03:25,614 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-08-04 02:03:25,614 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1244862554] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 02:03:25,614 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 02:03:25,614 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 4 [2023-08-04 02:03:25,615 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1239399189] [2023-08-04 02:03:25,615 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 02:03:25,615 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 02:03:25,616 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 02:03:25,617 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 02:03:25,617 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-04 02:03:25,646 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 382 out of 940 [2023-08-04 02:03:25,648 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 28 transitions, 99 flow. Second operand has 5 states, 5 states have (on average 384.6) internal successors, (1923), 5 states have internal predecessors, (1923), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:03:25,648 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 02:03:25,648 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 382 of 940 [2023-08-04 02:03:25,648 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 02:03:26,175 INFO L124 PetriNetUnfolderBase]: 1432/2207 cut-off events. [2023-08-04 02:03:26,176 INFO L125 PetriNetUnfolderBase]: For 182/182 co-relation queries the response was YES. [2023-08-04 02:03:26,178 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4631 conditions, 2207 events. 1432/2207 cut-off events. For 182/182 co-relation queries the response was YES. Maximal size of possible extension queue 69. Compared 9503 event pairs, 784 based on Foata normal form. 2/2156 useless extension candidates. Maximal degree in co-relation 2626. Up to 2073 conditions per place. [2023-08-04 02:03:26,182 INFO L140 encePairwiseOnDemand]: 937/940 looper letters, 23 selfloop transitions, 3 changer transitions 0/31 dead transitions. [2023-08-04 02:03:26,182 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 31 transitions, 156 flow [2023-08-04 02:03:26,183 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 02:03:26,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 02:03:26,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1555 transitions. [2023-08-04 02:03:26,186 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41356382978723405 [2023-08-04 02:03:26,186 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1555 transitions. [2023-08-04 02:03:26,186 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1555 transitions. [2023-08-04 02:03:26,187 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 02:03:26,187 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1555 transitions. [2023-08-04 02:03:26,190 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 388.75) internal successors, (1555), 4 states have internal predecessors, (1555), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:03:26,194 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 940.0) internal successors, (4700), 5 states have internal predecessors, (4700), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:03:26,196 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 940.0) internal successors, (4700), 5 states have internal predecessors, (4700), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:03:26,196 INFO L175 Difference]: Start difference. First operand has 43 places, 28 transitions, 99 flow. Second operand 4 states and 1555 transitions. [2023-08-04 02:03:26,196 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 31 transitions, 156 flow [2023-08-04 02:03:26,197 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 31 transitions, 152 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-04 02:03:26,197 INFO L231 Difference]: Finished difference. Result has 44 places, 27 transitions, 96 flow [2023-08-04 02:03:26,197 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=940, PETRI_DIFFERENCE_MINUEND_FLOW=90, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=27, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=96, PETRI_PLACES=44, PETRI_TRANSITIONS=27} [2023-08-04 02:03:26,198 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, -12 predicate places. [2023-08-04 02:03:26,198 INFO L495 AbstractCegarLoop]: Abstraction has has 44 places, 27 transitions, 96 flow [2023-08-04 02:03:26,199 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 384.6) internal successors, (1923), 5 states have internal predecessors, (1923), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:03:26,199 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 02:03:26,199 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 02:03:26,204 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-08-04 02:03:26,404 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 02:03:26,405 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-04 02:03:26,405 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 02:03:26,405 INFO L85 PathProgramCache]: Analyzing trace with hash 615979934, now seen corresponding path program 1 times [2023-08-04 02:03:26,405 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 02:03:26,405 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1950850225] [2023-08-04 02:03:26,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 02:03:26,405 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 02:03:26,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 02:03:26,496 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-04 02:03:26,496 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 02:03:26,497 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1950850225] [2023-08-04 02:03:26,498 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1950850225] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 02:03:26,498 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [595690594] [2023-08-04 02:03:26,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 02:03:26,501 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 02:03:26,501 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 02:03:26,502 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 02:03:26,528 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-08-04 02:03:26,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 02:03:26,585 INFO L262 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-04 02:03:26,586 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 02:03:26,599 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-04 02:03:26,600 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 02:03:26,600 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [595690594] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 02:03:26,600 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 02:03:26,600 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 6 [2023-08-04 02:03:26,600 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1795082313] [2023-08-04 02:03:26,600 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 02:03:26,600 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 02:03:26,601 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 02:03:26,601 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 02:03:26,601 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-08-04 02:03:26,611 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 382 out of 940 [2023-08-04 02:03:26,613 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 27 transitions, 96 flow. Second operand has 5 states, 5 states have (on average 384.6) internal successors, (1923), 5 states have internal predecessors, (1923), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:03:26,613 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 02:03:26,613 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 382 of 940 [2023-08-04 02:03:26,613 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 02:03:27,110 INFO L124 PetriNetUnfolderBase]: 1400/2195 cut-off events. [2023-08-04 02:03:27,111 INFO L125 PetriNetUnfolderBase]: For 154/154 co-relation queries the response was YES. [2023-08-04 02:03:27,114 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4583 conditions, 2195 events. 1400/2195 cut-off events. For 154/154 co-relation queries the response was YES. Maximal size of possible extension queue 69. Compared 9734 event pairs, 344 based on Foata normal form. 0/2150 useless extension candidates. Maximal degree in co-relation 2583. Up to 1904 conditions per place. [2023-08-04 02:03:27,118 INFO L140 encePairwiseOnDemand]: 936/940 looper letters, 30 selfloop transitions, 5 changer transitions 0/39 dead transitions. [2023-08-04 02:03:27,118 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 39 transitions, 188 flow [2023-08-04 02:03:27,119 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-04 02:03:27,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-04 02:03:27,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1945 transitions. [2023-08-04 02:03:27,123 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41382978723404257 [2023-08-04 02:03:27,123 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1945 transitions. [2023-08-04 02:03:27,123 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1945 transitions. [2023-08-04 02:03:27,124 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 02:03:27,124 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1945 transitions. [2023-08-04 02:03:27,127 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 389.0) internal successors, (1945), 5 states have internal predecessors, (1945), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:03:27,132 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 940.0) internal successors, (5640), 6 states have internal predecessors, (5640), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:03:27,134 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 940.0) internal successors, (5640), 6 states have internal predecessors, (5640), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:03:27,134 INFO L175 Difference]: Start difference. First operand has 44 places, 27 transitions, 96 flow. Second operand 5 states and 1945 transitions. [2023-08-04 02:03:27,134 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 39 transitions, 188 flow [2023-08-04 02:03:27,135 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 43 places, 39 transitions, 181 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-08-04 02:03:27,135 INFO L231 Difference]: Finished difference. Result has 44 places, 29 transitions, 108 flow [2023-08-04 02:03:27,135 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=940, PETRI_DIFFERENCE_MINUEND_FLOW=85, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=26, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=108, PETRI_PLACES=44, PETRI_TRANSITIONS=29} [2023-08-04 02:03:27,136 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, -12 predicate places. [2023-08-04 02:03:27,136 INFO L495 AbstractCegarLoop]: Abstraction has has 44 places, 29 transitions, 108 flow [2023-08-04 02:03:27,137 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 384.6) internal successors, (1923), 5 states have internal predecessors, (1923), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:03:27,137 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 02:03:27,137 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 02:03:27,156 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-08-04 02:03:27,342 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 02:03:27,342 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-04 02:03:27,343 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 02:03:27,343 INFO L85 PathProgramCache]: Analyzing trace with hash -1016672278, now seen corresponding path program 1 times [2023-08-04 02:03:27,343 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 02:03:27,343 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1900694622] [2023-08-04 02:03:27,343 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 02:03:27,343 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 02:03:27,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 02:03:27,385 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2023-08-04 02:03:27,385 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 02:03:27,385 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1900694622] [2023-08-04 02:03:27,385 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1900694622] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 02:03:27,385 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 02:03:27,385 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-04 02:03:27,386 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1615010936] [2023-08-04 02:03:27,386 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 02:03:27,388 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 02:03:27,389 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 02:03:27,389 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 02:03:27,389 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-04 02:03:27,396 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 383 out of 940 [2023-08-04 02:03:27,398 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 29 transitions, 108 flow. Second operand has 3 states, 3 states have (on average 386.6666666666667) internal successors, (1160), 3 states have internal predecessors, (1160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:03:27,398 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 02:03:27,398 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 383 of 940 [2023-08-04 02:03:27,398 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 02:03:27,827 INFO L124 PetriNetUnfolderBase]: 1272/1967 cut-off events. [2023-08-04 02:03:27,827 INFO L125 PetriNetUnfolderBase]: For 182/182 co-relation queries the response was YES. [2023-08-04 02:03:27,830 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4164 conditions, 1967 events. 1272/1967 cut-off events. For 182/182 co-relation queries the response was YES. Maximal size of possible extension queue 66. Compared 8171 event pairs, 992 based on Foata normal form. 4/1942 useless extension candidates. Maximal degree in co-relation 2335. Up to 1801 conditions per place. [2023-08-04 02:03:27,835 INFO L140 encePairwiseOnDemand]: 937/940 looper letters, 26 selfloop transitions, 2 changer transitions 0/32 dead transitions. [2023-08-04 02:03:27,835 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 32 transitions, 169 flow [2023-08-04 02:03:27,836 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 02:03:27,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 02:03:27,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1176 transitions. [2023-08-04 02:03:27,838 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41702127659574467 [2023-08-04 02:03:27,838 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1176 transitions. [2023-08-04 02:03:27,838 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1176 transitions. [2023-08-04 02:03:27,839 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 02:03:27,839 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1176 transitions. [2023-08-04 02:03:27,841 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 392.0) internal successors, (1176), 3 states have internal predecessors, (1176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:03:27,843 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 940.0) internal successors, (3760), 4 states have internal predecessors, (3760), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:03:27,844 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 940.0) internal successors, (3760), 4 states have internal predecessors, (3760), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:03:27,844 INFO L175 Difference]: Start difference. First operand has 44 places, 29 transitions, 108 flow. Second operand 3 states and 1176 transitions. [2023-08-04 02:03:27,844 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 32 transitions, 169 flow [2023-08-04 02:03:27,845 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 32 transitions, 168 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 02:03:27,846 INFO L231 Difference]: Finished difference. Result has 45 places, 28 transitions, 106 flow [2023-08-04 02:03:27,847 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=940, PETRI_DIFFERENCE_MINUEND_FLOW=102, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=28, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=106, PETRI_PLACES=45, PETRI_TRANSITIONS=28} [2023-08-04 02:03:27,849 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, -11 predicate places. [2023-08-04 02:03:27,849 INFO L495 AbstractCegarLoop]: Abstraction has has 45 places, 28 transitions, 106 flow [2023-08-04 02:03:27,850 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 386.6666666666667) internal successors, (1160), 3 states have internal predecessors, (1160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:03:27,850 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 02:03:27,850 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 02:03:27,850 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-08-04 02:03:27,850 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-04 02:03:27,850 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 02:03:27,850 INFO L85 PathProgramCache]: Analyzing trace with hash 27674540, now seen corresponding path program 1 times [2023-08-04 02:03:27,851 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 02:03:27,853 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [239196237] [2023-08-04 02:03:27,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 02:03:27,853 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 02:03:27,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 02:03:27,913 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2023-08-04 02:03:27,914 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 02:03:27,914 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [239196237] [2023-08-04 02:03:27,914 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [239196237] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 02:03:27,914 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1056110880] [2023-08-04 02:03:27,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 02:03:27,914 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 02:03:27,914 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 02:03:27,916 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 02:03:27,943 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-08-04 02:03:28,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 02:03:28,005 INFO L262 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-04 02:03:28,006 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 02:03:28,018 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2023-08-04 02:03:28,018 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 02:03:28,031 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2023-08-04 02:03:28,031 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1056110880] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 02:03:28,031 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 02:03:28,031 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 5 [2023-08-04 02:03:28,032 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1228931492] [2023-08-04 02:03:28,032 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 02:03:28,032 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 02:03:28,032 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 02:03:28,033 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 02:03:28,033 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-04 02:03:28,044 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 382 out of 940 [2023-08-04 02:03:28,046 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 28 transitions, 106 flow. Second operand has 5 states, 5 states have (on average 385.6) internal successors, (1928), 5 states have internal predecessors, (1928), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:03:28,046 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 02:03:28,046 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 382 of 940 [2023-08-04 02:03:28,046 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 02:03:28,453 INFO L124 PetriNetUnfolderBase]: 936/1431 cut-off events. [2023-08-04 02:03:28,453 INFO L125 PetriNetUnfolderBase]: For 158/158 co-relation queries the response was YES. [2023-08-04 02:03:28,457 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3056 conditions, 1431 events. 936/1431 cut-off events. For 158/158 co-relation queries the response was YES. Maximal size of possible extension queue 65. Compared 5331 event pairs, 536 based on Foata normal form. 8/1418 useless extension candidates. Maximal degree in co-relation 1701. Up to 1225 conditions per place. [2023-08-04 02:03:28,460 INFO L140 encePairwiseOnDemand]: 937/940 looper letters, 28 selfloop transitions, 3 changer transitions 0/35 dead transitions. [2023-08-04 02:03:28,460 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 35 transitions, 181 flow [2023-08-04 02:03:28,461 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 02:03:28,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 02:03:28,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1559 transitions. [2023-08-04 02:03:28,464 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41462765957446807 [2023-08-04 02:03:28,464 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1559 transitions. [2023-08-04 02:03:28,464 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1559 transitions. [2023-08-04 02:03:28,465 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 02:03:28,465 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1559 transitions. [2023-08-04 02:03:28,467 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 389.75) internal successors, (1559), 4 states have internal predecessors, (1559), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:03:28,470 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 940.0) internal successors, (4700), 5 states have internal predecessors, (4700), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:03:28,471 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 940.0) internal successors, (4700), 5 states have internal predecessors, (4700), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:03:28,471 INFO L175 Difference]: Start difference. First operand has 45 places, 28 transitions, 106 flow. Second operand 4 states and 1559 transitions. [2023-08-04 02:03:28,471 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 35 transitions, 181 flow [2023-08-04 02:03:28,472 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 35 transitions, 177 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-04 02:03:28,472 INFO L231 Difference]: Finished difference. Result has 46 places, 27 transitions, 103 flow [2023-08-04 02:03:28,472 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=940, PETRI_DIFFERENCE_MINUEND_FLOW=97, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=27, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=103, PETRI_PLACES=46, PETRI_TRANSITIONS=27} [2023-08-04 02:03:28,473 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, -10 predicate places. [2023-08-04 02:03:28,473 INFO L495 AbstractCegarLoop]: Abstraction has has 46 places, 27 transitions, 103 flow [2023-08-04 02:03:28,473 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 385.6) internal successors, (1928), 5 states have internal predecessors, (1928), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:03:28,473 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 02:03:28,474 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 02:03:28,493 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-08-04 02:03:28,678 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 02:03:28,679 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-04 02:03:28,679 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 02:03:28,679 INFO L85 PathProgramCache]: Analyzing trace with hash -2116167667, now seen corresponding path program 1 times [2023-08-04 02:03:28,679 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 02:03:28,680 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [132110665] [2023-08-04 02:03:28,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 02:03:28,680 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 02:03:28,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 02:03:28,735 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-08-04 02:03:28,736 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 02:03:28,736 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [132110665] [2023-08-04 02:03:28,736 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [132110665] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 02:03:28,736 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1707205647] [2023-08-04 02:03:28,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 02:03:28,737 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 02:03:28,737 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 02:03:28,750 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 02:03:28,751 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-08-04 02:03:28,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 02:03:28,841 INFO L262 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-04 02:03:28,842 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 02:03:28,861 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-08-04 02:03:28,861 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 02:03:28,861 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1707205647] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 02:03:28,861 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 02:03:28,861 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 6 [2023-08-04 02:03:28,861 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1110722646] [2023-08-04 02:03:28,861 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 02:03:28,862 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 02:03:28,862 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 02:03:28,862 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 02:03:28,862 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-08-04 02:03:28,872 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 382 out of 940 [2023-08-04 02:03:28,874 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 27 transitions, 103 flow. Second operand has 5 states, 5 states have (on average 385.6) internal successors, (1928), 5 states have internal predecessors, (1928), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:03:28,874 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 02:03:28,874 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 382 of 940 [2023-08-04 02:03:28,874 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 02:03:29,165 INFO L124 PetriNetUnfolderBase]: 744/1143 cut-off events. [2023-08-04 02:03:29,166 INFO L125 PetriNetUnfolderBase]: For 190/190 co-relation queries the response was YES. [2023-08-04 02:03:29,167 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2496 conditions, 1143 events. 744/1143 cut-off events. For 190/190 co-relation queries the response was YES. Maximal size of possible extension queue 55. Compared 3976 event pairs, 104 based on Foata normal form. 64/1186 useless extension candidates. Maximal degree in co-relation 1399. Up to 448 conditions per place. [2023-08-04 02:03:29,168 INFO L140 encePairwiseOnDemand]: 937/940 looper letters, 0 selfloop transitions, 0 changer transitions 43/43 dead transitions. [2023-08-04 02:03:29,168 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 43 transitions, 213 flow [2023-08-04 02:03:29,169 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-04 02:03:29,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-04 02:03:29,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1949 transitions. [2023-08-04 02:03:29,172 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4146808510638298 [2023-08-04 02:03:29,172 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1949 transitions. [2023-08-04 02:03:29,172 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1949 transitions. [2023-08-04 02:03:29,173 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 02:03:29,173 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1949 transitions. [2023-08-04 02:03:29,176 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 389.8) internal successors, (1949), 5 states have internal predecessors, (1949), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:03:29,179 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 940.0) internal successors, (5640), 6 states have internal predecessors, (5640), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:03:29,180 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 940.0) internal successors, (5640), 6 states have internal predecessors, (5640), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:03:29,180 INFO L175 Difference]: Start difference. First operand has 46 places, 27 transitions, 103 flow. Second operand 5 states and 1949 transitions. [2023-08-04 02:03:29,180 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 49 places, 43 transitions, 213 flow [2023-08-04 02:03:29,181 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 43 transitions, 206 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-08-04 02:03:29,181 INFO L231 Difference]: Finished difference. Result has 45 places, 0 transitions, 0 flow [2023-08-04 02:03:29,181 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=940, PETRI_DIFFERENCE_MINUEND_FLOW=92, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=26, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=0, PETRI_PLACES=45, PETRI_TRANSITIONS=0} [2023-08-04 02:03:29,182 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, -11 predicate places. [2023-08-04 02:03:29,182 INFO L495 AbstractCegarLoop]: Abstraction has has 45 places, 0 transitions, 0 flow [2023-08-04 02:03:29,183 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 385.6) internal successors, (1928), 5 states have internal predecessors, (1928), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:03:29,183 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (2 of 3 remaining) [2023-08-04 02:03:29,183 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 3 remaining) [2023-08-04 02:03:29,183 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 3 remaining) [2023-08-04 02:03:29,190 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-08-04 02:03:29,387 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 02:03:29,388 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1, 1] [2023-08-04 02:03:29,388 INFO L307 ceAbstractionStarter]: Result for error location InUseError was SAFE,SAFE,SAFE (1/2) [2023-08-04 02:03:29,392 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 383 places, 432 transitions, 954 flow [2023-08-04 02:03:30,138 INFO L124 PetriNetUnfolderBase]: 1054/5405 cut-off events. [2023-08-04 02:03:30,138 INFO L125 PetriNetUnfolderBase]: For 602/602 co-relation queries the response was YES. [2023-08-04 02:03:30,240 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6079 conditions, 5405 events. 1054/5405 cut-off events. For 602/602 co-relation queries the response was YES. Maximal size of possible extension queue 120. Compared 48088 event pairs, 22 based on Foata normal form. 0/4595 useless extension candidates. Maximal degree in co-relation 3224. Up to 192 conditions per place. [2023-08-04 02:03:30,240 INFO L82 GeneralOperation]: Start removeDead. Operand has 383 places, 432 transitions, 954 flow [2023-08-04 02:03:30,272 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 383 places, 432 transitions, 954 flow [2023-08-04 02:03:30,272 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-04 02:03:30,272 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 383 places, 432 transitions, 954 flow [2023-08-04 02:03:30,273 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 383 places, 432 transitions, 954 flow [2023-08-04 02:03:30,273 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 383 places, 432 transitions, 954 flow [2023-08-04 02:03:31,019 INFO L124 PetriNetUnfolderBase]: 1054/5405 cut-off events. [2023-08-04 02:03:31,019 INFO L125 PetriNetUnfolderBase]: For 602/602 co-relation queries the response was YES. [2023-08-04 02:03:31,137 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6079 conditions, 5405 events. 1054/5405 cut-off events. For 602/602 co-relation queries the response was YES. Maximal size of possible extension queue 120. Compared 48088 event pairs, 22 based on Foata normal form. 0/4595 useless extension candidates. Maximal degree in co-relation 3224. Up to 192 conditions per place. [2023-08-04 02:03:31,385 INFO L119 LiptonReduction]: Number of co-enabled transitions 107448 [2023-08-04 02:03:40,288 INFO L134 LiptonReduction]: Checked pairs total: 132151 [2023-08-04 02:03:40,288 INFO L136 LiptonReduction]: Total number of compositions: 515 [2023-08-04 02:03:40,290 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-04 02:03:40,291 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;@6d86616a, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-04 02:03:40,291 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-04 02:03:40,293 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-04 02:03:40,294 INFO L124 PetriNetUnfolderBase]: 1/34 cut-off events. [2023-08-04 02:03:40,294 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-08-04 02:03:40,294 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 02:03:40,294 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 02:03:40,294 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 02:03:40,294 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 02:03:40,294 INFO L85 PathProgramCache]: Analyzing trace with hash -301928520, now seen corresponding path program 1 times [2023-08-04 02:03:40,294 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 02:03:40,294 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [359266274] [2023-08-04 02:03:40,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 02:03:40,295 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 02:03:40,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 02:03:40,326 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-04 02:03:40,326 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 02:03:40,326 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [359266274] [2023-08-04 02:03:40,326 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [359266274] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 02:03:40,326 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 02:03:40,326 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-04 02:03:40,327 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1105731340] [2023-08-04 02:03:40,327 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 02:03:40,327 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 02:03:40,327 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 02:03:40,327 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 02:03:40,327 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-04 02:03:40,336 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 383 out of 947 [2023-08-04 02:03:40,336 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 62 transitions, 214 flow. Second operand has 3 states, 3 states have (on average 385.3333333333333) internal successors, (1156), 3 states have internal predecessors, (1156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:03:40,336 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 02:03:40,336 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 383 of 947 [2023-08-04 02:03:40,337 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 02:03:44,853 INFO L124 PetriNetUnfolderBase]: 21389/32665 cut-off events. [2023-08-04 02:03:44,853 INFO L125 PetriNetUnfolderBase]: For 7142/7142 co-relation queries the response was YES. [2023-08-04 02:03:44,898 INFO L83 FinitePrefix]: Finished finitePrefix Result has 67783 conditions, 32665 events. 21389/32665 cut-off events. For 7142/7142 co-relation queries the response was YES. Maximal size of possible extension queue 782. Compared 213487 event pairs, 14517 based on Foata normal form. 729/30798 useless extension candidates. Maximal degree in co-relation 27370. Up to 30193 conditions per place. [2023-08-04 02:03:44,966 INFO L140 encePairwiseOnDemand]: 942/947 looper letters, 51 selfloop transitions, 2 changer transitions 3/63 dead transitions. [2023-08-04 02:03:44,966 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 63 transitions, 322 flow [2023-08-04 02:03:44,967 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 02:03:44,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 02:03:44,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1205 transitions. [2023-08-04 02:03:44,969 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42414642731432595 [2023-08-04 02:03:44,969 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1205 transitions. [2023-08-04 02:03:44,969 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1205 transitions. [2023-08-04 02:03:44,969 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 02:03:44,969 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1205 transitions. [2023-08-04 02:03:44,971 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 401.6666666666667) internal successors, (1205), 3 states have internal predecessors, (1205), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:03:44,973 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 947.0) internal successors, (3788), 4 states have internal predecessors, (3788), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:03:44,973 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 947.0) internal successors, (3788), 4 states have internal predecessors, (3788), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:03:44,973 INFO L175 Difference]: Start difference. First operand has 56 places, 62 transitions, 214 flow. Second operand 3 states and 1205 transitions. [2023-08-04 02:03:44,974 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 63 transitions, 322 flow [2023-08-04 02:03:44,978 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 63 transitions, 322 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-04 02:03:44,979 INFO L231 Difference]: Finished difference. Result has 58 places, 58 transitions, 204 flow [2023-08-04 02:03:44,979 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=947, PETRI_DIFFERENCE_MINUEND_FLOW=210, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=60, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=204, PETRI_PLACES=58, PETRI_TRANSITIONS=58} [2023-08-04 02:03:44,980 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 2 predicate places. [2023-08-04 02:03:44,980 INFO L495 AbstractCegarLoop]: Abstraction has has 58 places, 58 transitions, 204 flow [2023-08-04 02:03:44,980 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 385.3333333333333) internal successors, (1156), 3 states have internal predecessors, (1156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:03:44,980 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 02:03:44,980 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 02:03:44,980 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-08-04 02:03:44,980 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 02:03:44,980 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 02:03:44,981 INFO L85 PathProgramCache]: Analyzing trace with hash -1782077622, now seen corresponding path program 1 times [2023-08-04 02:03:44,981 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 02:03:44,981 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [138890563] [2023-08-04 02:03:44,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 02:03:44,981 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 02:03:44,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 02:03:45,005 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-04 02:03:45,006 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 02:03:45,006 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [138890563] [2023-08-04 02:03:45,006 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [138890563] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 02:03:45,006 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1424488684] [2023-08-04 02:03:45,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 02:03:45,006 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 02:03:45,006 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 02:03:45,007 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 02:03:45,025 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-08-04 02:03:45,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 02:03:45,104 INFO L262 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 02:03:45,105 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 02:03:45,109 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-04 02:03:45,109 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 02:03:45,109 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1424488684] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 02:03:45,109 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 02:03:45,109 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2023-08-04 02:03:45,110 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2026654831] [2023-08-04 02:03:45,110 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 02:03:45,110 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 02:03:45,110 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 02:03:45,110 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 02:03:45,110 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 02:03:45,117 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 383 out of 947 [2023-08-04 02:03:45,118 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 58 transitions, 204 flow. Second operand has 3 states, 3 states have (on average 386.6666666666667) internal successors, (1160), 3 states have internal predecessors, (1160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:03:45,118 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 02:03:45,118 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 383 of 947 [2023-08-04 02:03:45,118 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 02:03:49,372 INFO L124 PetriNetUnfolderBase]: 21175/32271 cut-off events. [2023-08-04 02:03:49,372 INFO L125 PetriNetUnfolderBase]: For 6665/6665 co-relation queries the response was YES. [2023-08-04 02:03:49,413 INFO L83 FinitePrefix]: Finished finitePrefix Result has 66876 conditions, 32271 events. 21175/32271 cut-off events. For 6665/6665 co-relation queries the response was YES. Maximal size of possible extension queue 805. Compared 211090 event pairs, 14444 based on Foata normal form. 0/29753 useless extension candidates. Maximal degree in co-relation 66846. Up to 29819 conditions per place. [2023-08-04 02:03:49,475 INFO L140 encePairwiseOnDemand]: 944/947 looper letters, 54 selfloop transitions, 2 changer transitions 0/63 dead transitions. [2023-08-04 02:03:49,475 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 63 transitions, 326 flow [2023-08-04 02:03:49,476 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 02:03:49,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 02:03:49,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1205 transitions. [2023-08-04 02:03:49,478 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42414642731432595 [2023-08-04 02:03:49,478 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1205 transitions. [2023-08-04 02:03:49,478 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1205 transitions. [2023-08-04 02:03:49,478 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 02:03:49,478 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1205 transitions. [2023-08-04 02:03:49,480 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 401.6666666666667) internal successors, (1205), 3 states have internal predecessors, (1205), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:03:49,482 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 947.0) internal successors, (3788), 4 states have internal predecessors, (3788), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:03:49,482 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 947.0) internal successors, (3788), 4 states have internal predecessors, (3788), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:03:49,482 INFO L175 Difference]: Start difference. First operand has 58 places, 58 transitions, 204 flow. Second operand 3 states and 1205 transitions. [2023-08-04 02:03:49,482 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 63 transitions, 326 flow [2023-08-04 02:03:49,497 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 63 transitions, 312 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-08-04 02:03:49,498 INFO L231 Difference]: Finished difference. Result has 54 places, 59 transitions, 202 flow [2023-08-04 02:03:49,498 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=947, PETRI_DIFFERENCE_MINUEND_FLOW=190, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=58, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=202, PETRI_PLACES=54, PETRI_TRANSITIONS=59} [2023-08-04 02:03:49,499 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, -2 predicate places. [2023-08-04 02:03:49,499 INFO L495 AbstractCegarLoop]: Abstraction has has 54 places, 59 transitions, 202 flow [2023-08-04 02:03:49,499 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 386.6666666666667) internal successors, (1160), 3 states have internal predecessors, (1160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:03:49,499 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 02:03:49,499 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 02:03:49,506 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2023-08-04 02:03:49,703 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-08-04 02:03:49,703 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 02:03:49,704 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 02:03:49,704 INFO L85 PathProgramCache]: Analyzing trace with hash 793777612, now seen corresponding path program 1 times [2023-08-04 02:03:49,704 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 02:03:49,704 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1192168461] [2023-08-04 02:03:49,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 02:03:49,704 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 02:03:49,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 02:03:49,729 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-04 02:03:49,730 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 02:03:49,730 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1192168461] [2023-08-04 02:03:49,730 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1192168461] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 02:03:49,730 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [527108358] [2023-08-04 02:03:49,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 02:03:49,730 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 02:03:49,730 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 02:03:49,746 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 02:03:49,746 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-08-04 02:03:49,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 02:03:49,828 INFO L262 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 02:03:49,829 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 02:03:49,835 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-04 02:03:49,835 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 02:03:49,836 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [527108358] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 02:03:49,836 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 02:03:49,836 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2023-08-04 02:03:49,837 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1415395636] [2023-08-04 02:03:49,837 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 02:03:49,838 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 02:03:49,838 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 02:03:49,838 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 02:03:49,838 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 02:03:49,845 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 383 out of 947 [2023-08-04 02:03:49,845 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 59 transitions, 202 flow. Second operand has 3 states, 3 states have (on average 387.6666666666667) internal successors, (1163), 3 states have internal predecessors, (1163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:03:49,845 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 02:03:49,845 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 383 of 947 [2023-08-04 02:03:49,846 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 02:03:54,955 INFO L124 PetriNetUnfolderBase]: 21139/32679 cut-off events. [2023-08-04 02:03:54,955 INFO L125 PetriNetUnfolderBase]: For 2898/2898 co-relation queries the response was YES. [2023-08-04 02:03:55,045 INFO L83 FinitePrefix]: Finished finitePrefix Result has 67251 conditions, 32679 events. 21139/32679 cut-off events. For 2898/2898 co-relation queries the response was YES. Maximal size of possible extension queue 898. Compared 219809 event pairs, 14389 based on Foata normal form. 0/30233 useless extension candidates. Maximal degree in co-relation 29434. Up to 29443 conditions per place. [2023-08-04 02:03:55,126 INFO L140 encePairwiseOnDemand]: 944/947 looper letters, 57 selfloop transitions, 2 changer transitions 0/66 dead transitions. [2023-08-04 02:03:55,126 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 66 transitions, 334 flow [2023-08-04 02:03:55,126 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 02:03:55,126 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 02:03:55,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1207 transitions. [2023-08-04 02:03:55,128 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42485040478704683 [2023-08-04 02:03:55,128 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1207 transitions. [2023-08-04 02:03:55,128 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1207 transitions. [2023-08-04 02:03:55,129 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 02:03:55,129 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1207 transitions. [2023-08-04 02:03:55,130 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 402.3333333333333) internal successors, (1207), 3 states have internal predecessors, (1207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:03:55,132 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 947.0) internal successors, (3788), 4 states have internal predecessors, (3788), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:03:55,133 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 947.0) internal successors, (3788), 4 states have internal predecessors, (3788), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:03:55,133 INFO L175 Difference]: Start difference. First operand has 54 places, 59 transitions, 202 flow. Second operand 3 states and 1207 transitions. [2023-08-04 02:03:55,133 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 66 transitions, 334 flow [2023-08-04 02:03:55,136 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 66 transitions, 332 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 02:03:55,137 INFO L231 Difference]: Finished difference. Result has 56 places, 60 transitions, 212 flow [2023-08-04 02:03:55,137 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=947, PETRI_DIFFERENCE_MINUEND_FLOW=200, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=212, PETRI_PLACES=56, PETRI_TRANSITIONS=60} [2023-08-04 02:03:55,138 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 0 predicate places. [2023-08-04 02:03:55,138 INFO L495 AbstractCegarLoop]: Abstraction has has 56 places, 60 transitions, 212 flow [2023-08-04 02:03:55,138 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 387.6666666666667) internal successors, (1163), 3 states have internal predecessors, (1163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:03:55,138 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 02:03:55,138 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 02:03:55,155 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-08-04 02:03:55,343 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 02:03:55,343 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 02:03:55,343 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 02:03:55,343 INFO L85 PathProgramCache]: Analyzing trace with hash -1287451774, now seen corresponding path program 1 times [2023-08-04 02:03:55,343 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 02:03:55,343 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [553111915] [2023-08-04 02:03:55,343 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 02:03:55,343 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 02:03:55,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 02:03:55,374 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-04 02:03:55,374 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 02:03:55,374 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [553111915] [2023-08-04 02:03:55,374 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [553111915] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 02:03:55,374 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [775859665] [2023-08-04 02:03:55,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 02:03:55,374 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 02:03:55,374 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 02:03:55,389 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 02:03:55,441 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-08-04 02:03:55,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 02:03:55,531 INFO L262 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 02:03:55,533 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 02:03:55,538 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-04 02:03:55,538 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 02:03:55,538 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [775859665] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 02:03:55,538 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 02:03:55,538 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2023-08-04 02:03:55,538 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [993276016] [2023-08-04 02:03:55,538 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 02:03:55,539 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 02:03:55,539 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 02:03:55,540 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 02:03:55,540 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 02:03:55,546 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 383 out of 947 [2023-08-04 02:03:55,547 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 60 transitions, 212 flow. Second operand has 3 states, 3 states have (on average 388.6666666666667) internal successors, (1166), 3 states have internal predecessors, (1166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:03:55,547 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 02:03:55,547 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 383 of 947 [2023-08-04 02:03:55,547 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 02:04:00,118 INFO L124 PetriNetUnfolderBase]: 20051/31247 cut-off events. [2023-08-04 02:04:00,118 INFO L125 PetriNetUnfolderBase]: For 2910/2910 co-relation queries the response was YES. [2023-08-04 02:04:00,205 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65044 conditions, 31247 events. 20051/31247 cut-off events. For 2910/2910 co-relation queries the response was YES. Maximal size of possible extension queue 863. Compared 211291 event pairs, 14329 based on Foata normal form. 0/29209 useless extension candidates. Maximal degree in co-relation 30954. Up to 25511 conditions per place. [2023-08-04 02:04:00,275 INFO L140 encePairwiseOnDemand]: 944/947 looper letters, 65 selfloop transitions, 2 changer transitions 0/74 dead transitions. [2023-08-04 02:04:00,275 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 74 transitions, 389 flow [2023-08-04 02:04:00,276 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 02:04:00,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 02:04:00,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1214 transitions. [2023-08-04 02:04:00,278 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4273143259415699 [2023-08-04 02:04:00,278 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1214 transitions. [2023-08-04 02:04:00,278 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1214 transitions. [2023-08-04 02:04:00,278 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 02:04:00,278 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1214 transitions. [2023-08-04 02:04:00,279 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 404.6666666666667) internal successors, (1214), 3 states have internal predecessors, (1214), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:04:00,282 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 947.0) internal successors, (3788), 4 states have internal predecessors, (3788), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:04:00,282 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 947.0) internal successors, (3788), 4 states have internal predecessors, (3788), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:04:00,282 INFO L175 Difference]: Start difference. First operand has 56 places, 60 transitions, 212 flow. Second operand 3 states and 1214 transitions. [2023-08-04 02:04:00,282 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 74 transitions, 389 flow [2023-08-04 02:04:00,285 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 74 transitions, 387 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 02:04:00,286 INFO L231 Difference]: Finished difference. Result has 58 places, 61 transitions, 222 flow [2023-08-04 02:04:00,286 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=947, PETRI_DIFFERENCE_MINUEND_FLOW=210, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=60, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=222, PETRI_PLACES=58, PETRI_TRANSITIONS=61} [2023-08-04 02:04:00,287 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 2 predicate places. [2023-08-04 02:04:00,287 INFO L495 AbstractCegarLoop]: Abstraction has has 58 places, 61 transitions, 222 flow [2023-08-04 02:04:00,287 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 388.6666666666667) internal successors, (1166), 3 states have internal predecessors, (1166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:04:00,287 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 02:04:00,287 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] [2023-08-04 02:04:00,294 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-08-04 02:04:00,492 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 02:04:00,492 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 02:04:00,492 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 02:04:00,492 INFO L85 PathProgramCache]: Analyzing trace with hash 140242932, now seen corresponding path program 1 times [2023-08-04 02:04:00,493 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 02:04:00,493 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1788909658] [2023-08-04 02:04:00,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 02:04:00,493 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 02:04:00,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 02:04:00,532 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-04 02:04:00,533 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 02:04:00,533 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1788909658] [2023-08-04 02:04:00,533 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1788909658] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 02:04:00,533 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [643086953] [2023-08-04 02:04:00,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 02:04:00,533 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 02:04:00,533 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 02:04:00,534 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 02:04:00,536 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-08-04 02:04:00,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 02:04:00,616 INFO L262 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 02:04:00,616 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 02:04:00,620 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-08-04 02:04:00,620 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 02:04:00,620 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [643086953] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 02:04:00,620 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 02:04:00,621 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2023-08-04 02:04:00,621 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [825158378] [2023-08-04 02:04:00,621 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 02:04:00,621 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 02:04:00,621 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 02:04:00,621 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 02:04:00,621 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 02:04:00,628 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 383 out of 947 [2023-08-04 02:04:00,629 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 61 transitions, 222 flow. Second operand has 3 states, 3 states have (on average 390.0) internal successors, (1170), 3 states have internal predecessors, (1170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:04:00,629 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 02:04:00,629 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 383 of 947 [2023-08-04 02:04:00,629 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 02:04:05,046 INFO L124 PetriNetUnfolderBase]: 19362/30530 cut-off events. [2023-08-04 02:04:05,046 INFO L125 PetriNetUnfolderBase]: For 4852/4852 co-relation queries the response was YES. [2023-08-04 02:04:05,108 INFO L83 FinitePrefix]: Finished finitePrefix Result has 66350 conditions, 30530 events. 19362/30530 cut-off events. For 4852/4852 co-relation queries the response was YES. Maximal size of possible extension queue 755. Compared 205749 event pairs, 13038 based on Foata normal form. 0/29541 useless extension candidates. Maximal degree in co-relation 34160. Up to 22127 conditions per place. [2023-08-04 02:04:05,172 INFO L140 encePairwiseOnDemand]: 944/947 looper letters, 66 selfloop transitions, 2 changer transitions 0/75 dead transitions. [2023-08-04 02:04:05,173 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 75 transitions, 401 flow [2023-08-04 02:04:05,173 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 02:04:05,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 02:04:05,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1214 transitions. [2023-08-04 02:04:05,175 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4273143259415699 [2023-08-04 02:04:05,175 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1214 transitions. [2023-08-04 02:04:05,175 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1214 transitions. [2023-08-04 02:04:05,176 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 02:04:05,176 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1214 transitions. [2023-08-04 02:04:05,177 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 404.6666666666667) internal successors, (1214), 3 states have internal predecessors, (1214), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:04:05,180 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 947.0) internal successors, (3788), 4 states have internal predecessors, (3788), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:04:05,180 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 947.0) internal successors, (3788), 4 states have internal predecessors, (3788), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:04:05,180 INFO L175 Difference]: Start difference. First operand has 58 places, 61 transitions, 222 flow. Second operand 3 states and 1214 transitions. [2023-08-04 02:04:05,180 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 75 transitions, 401 flow [2023-08-04 02:04:05,193 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 75 transitions, 399 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 02:04:05,194 INFO L231 Difference]: Finished difference. Result has 60 places, 62 transitions, 232 flow [2023-08-04 02:04:05,194 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=947, PETRI_DIFFERENCE_MINUEND_FLOW=220, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=61, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=232, PETRI_PLACES=60, PETRI_TRANSITIONS=62} [2023-08-04 02:04:05,195 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 4 predicate places. [2023-08-04 02:04:05,195 INFO L495 AbstractCegarLoop]: Abstraction has has 60 places, 62 transitions, 232 flow [2023-08-04 02:04:05,195 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 390.0) internal successors, (1170), 3 states have internal predecessors, (1170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:04:05,195 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 02:04:05,195 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 02:04:05,202 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-08-04 02:04:05,400 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-08-04 02:04:05,400 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 02:04:05,400 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 02:04:05,400 INFO L85 PathProgramCache]: Analyzing trace with hash 653863829, now seen corresponding path program 1 times [2023-08-04 02:04:05,401 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 02:04:05,401 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1208773235] [2023-08-04 02:04:05,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 02:04:05,401 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 02:04:05,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 02:04:05,450 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-08-04 02:04:05,450 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 02:04:05,450 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1208773235] [2023-08-04 02:04:05,450 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1208773235] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 02:04:05,450 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1373964684] [2023-08-04 02:04:05,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 02:04:05,450 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 02:04:05,451 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 02:04:05,452 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 02:04:05,454 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-08-04 02:04:05,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 02:04:05,559 INFO L262 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 02:04:05,560 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 02:04:05,565 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-08-04 02:04:05,566 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 02:04:05,566 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1373964684] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 02:04:05,566 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 02:04:05,566 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2023-08-04 02:04:05,566 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1959147288] [2023-08-04 02:04:05,566 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 02:04:05,566 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 02:04:05,567 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 02:04:05,567 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 02:04:05,567 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 02:04:05,575 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 383 out of 947 [2023-08-04 02:04:05,576 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 62 transitions, 232 flow. Second operand has 3 states, 3 states have (on average 391.3333333333333) internal successors, (1174), 3 states have internal predecessors, (1174), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:04:05,576 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 02:04:05,576 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 383 of 947 [2023-08-04 02:04:05,576 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 02:04:10,060 INFO L124 PetriNetUnfolderBase]: 19153/30213 cut-off events. [2023-08-04 02:04:10,060 INFO L125 PetriNetUnfolderBase]: For 5944/5944 co-relation queries the response was YES. [2023-08-04 02:04:10,179 INFO L83 FinitePrefix]: Finished finitePrefix Result has 68031 conditions, 30213 events. 19153/30213 cut-off events. For 5944/5944 co-relation queries the response was YES. Maximal size of possible extension queue 692. Compared 199095 event pairs, 14429 based on Foata normal form. 0/29937 useless extension candidates. Maximal degree in co-relation 36015. Up to 24281 conditions per place. [2023-08-04 02:04:10,258 INFO L140 encePairwiseOnDemand]: 944/947 looper letters, 67 selfloop transitions, 2 changer transitions 0/76 dead transitions. [2023-08-04 02:04:10,258 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 76 transitions, 413 flow [2023-08-04 02:04:10,258 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 02:04:10,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 02:04:10,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1214 transitions. [2023-08-04 02:04:10,260 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4273143259415699 [2023-08-04 02:04:10,260 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1214 transitions. [2023-08-04 02:04:10,260 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1214 transitions. [2023-08-04 02:04:10,261 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 02:04:10,261 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1214 transitions. [2023-08-04 02:04:10,262 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 404.6666666666667) internal successors, (1214), 3 states have internal predecessors, (1214), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:04:10,265 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 947.0) internal successors, (3788), 4 states have internal predecessors, (3788), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:04:10,265 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 947.0) internal successors, (3788), 4 states have internal predecessors, (3788), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:04:10,265 INFO L175 Difference]: Start difference. First operand has 60 places, 62 transitions, 232 flow. Second operand 3 states and 1214 transitions. [2023-08-04 02:04:10,265 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 76 transitions, 413 flow [2023-08-04 02:04:10,475 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 76 transitions, 411 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 02:04:10,476 INFO L231 Difference]: Finished difference. Result has 62 places, 63 transitions, 242 flow [2023-08-04 02:04:10,476 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=947, PETRI_DIFFERENCE_MINUEND_FLOW=230, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=62, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=242, PETRI_PLACES=62, PETRI_TRANSITIONS=63} [2023-08-04 02:04:10,476 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 6 predicate places. [2023-08-04 02:04:10,476 INFO L495 AbstractCegarLoop]: Abstraction has has 62 places, 63 transitions, 242 flow [2023-08-04 02:04:10,477 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 391.3333333333333) internal successors, (1174), 3 states have internal predecessors, (1174), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:04:10,477 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 02:04:10,477 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 02:04:10,482 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-08-04 02:04:10,682 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2023-08-04 02:04:10,682 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 02:04:10,682 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 02:04:10,683 INFO L85 PathProgramCache]: Analyzing trace with hash -1806089122, now seen corresponding path program 1 times [2023-08-04 02:04:10,683 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 02:04:10,683 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1601738763] [2023-08-04 02:04:10,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 02:04:10,683 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 02:04:10,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 02:04:10,764 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-08-04 02:04:10,764 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 02:04:10,764 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1601738763] [2023-08-04 02:04:10,765 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1601738763] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 02:04:10,765 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [879860886] [2023-08-04 02:04:10,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 02:04:10,765 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 02:04:10,765 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 02:04:10,781 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 02:04:10,784 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-08-04 02:04:10,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 02:04:10,915 INFO L262 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-04 02:04:10,920 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 02:04:10,934 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-08-04 02:04:10,934 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 02:04:10,968 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-08-04 02:04:10,968 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [879860886] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 02:04:10,969 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 02:04:10,969 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 4 [2023-08-04 02:04:10,970 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [796955193] [2023-08-04 02:04:10,970 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 02:04:10,970 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 02:04:10,970 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 02:04:10,970 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 02:04:10,970 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-04 02:04:10,984 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 382 out of 947 [2023-08-04 02:04:10,985 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 63 transitions, 242 flow. Second operand has 5 states, 5 states have (on average 388.6) internal successors, (1943), 5 states have internal predecessors, (1943), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:04:10,985 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 02:04:10,985 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 382 of 947 [2023-08-04 02:04:10,985 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 02:04:14,660 INFO L124 PetriNetUnfolderBase]: 17997/28375 cut-off events. [2023-08-04 02:04:14,660 INFO L125 PetriNetUnfolderBase]: For 5479/5479 co-relation queries the response was YES. [2023-08-04 02:04:14,761 INFO L83 FinitePrefix]: Finished finitePrefix Result has 64674 conditions, 28375 events. 17997/28375 cut-off events. For 5479/5479 co-relation queries the response was YES. Maximal size of possible extension queue 695. Compared 188140 event pairs, 10395 based on Foata normal form. 2/28348 useless extension candidates. Maximal degree in co-relation 48888. Up to 26179 conditions per place. [2023-08-04 02:04:14,832 INFO L140 encePairwiseOnDemand]: 943/947 looper letters, 57 selfloop transitions, 3 changer transitions 1/68 dead transitions. [2023-08-04 02:04:14,832 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 68 transitions, 374 flow [2023-08-04 02:04:14,833 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 02:04:14,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 02:04:14,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1585 transitions. [2023-08-04 02:04:14,835 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41842661034846884 [2023-08-04 02:04:14,835 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1585 transitions. [2023-08-04 02:04:14,835 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1585 transitions. [2023-08-04 02:04:14,835 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 02:04:14,835 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1585 transitions. [2023-08-04 02:04:14,837 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 396.25) internal successors, (1585), 4 states have internal predecessors, (1585), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:04:14,840 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 947.0) internal successors, (4735), 5 states have internal predecessors, (4735), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:04:14,840 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 947.0) internal successors, (4735), 5 states have internal predecessors, (4735), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:04:14,840 INFO L175 Difference]: Start difference. First operand has 62 places, 63 transitions, 242 flow. Second operand 4 states and 1585 transitions. [2023-08-04 02:04:14,840 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 68 transitions, 374 flow [2023-08-04 02:04:15,004 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 68 transitions, 372 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 02:04:15,005 INFO L231 Difference]: Finished difference. Result has 66 places, 63 transitions, 254 flow [2023-08-04 02:04:15,005 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=947, PETRI_DIFFERENCE_MINUEND_FLOW=240, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=63, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=254, PETRI_PLACES=66, PETRI_TRANSITIONS=63} [2023-08-04 02:04:15,006 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 10 predicate places. [2023-08-04 02:04:15,006 INFO L495 AbstractCegarLoop]: Abstraction has has 66 places, 63 transitions, 254 flow [2023-08-04 02:04:15,006 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 388.6) internal successors, (1943), 5 states have internal predecessors, (1943), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:04:15,006 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 02:04:15,006 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 02:04:15,011 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-08-04 02:04:15,211 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-08-04 02:04:15,211 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 02:04:15,212 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 02:04:15,212 INFO L85 PathProgramCache]: Analyzing trace with hash -1413161746, now seen corresponding path program 1 times [2023-08-04 02:04:15,212 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 02:04:15,212 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2080476242] [2023-08-04 02:04:15,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 02:04:15,212 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 02:04:15,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 02:04:15,288 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-08-04 02:04:15,288 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 02:04:15,288 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2080476242] [2023-08-04 02:04:15,288 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2080476242] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 02:04:15,288 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2043102124] [2023-08-04 02:04:15,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 02:04:15,288 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 02:04:15,289 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 02:04:15,310 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 02:04:15,351 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-08-04 02:04:15,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 02:04:15,452 INFO L262 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-04 02:04:15,453 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 02:04:15,464 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-08-04 02:04:15,464 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 02:04:15,474 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-08-04 02:04:15,474 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2043102124] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 02:04:15,474 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 02:04:15,474 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 5 [2023-08-04 02:04:15,474 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [236760164] [2023-08-04 02:04:15,474 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 02:04:15,475 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 02:04:15,475 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 02:04:15,475 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 02:04:15,475 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-04 02:04:15,484 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 382 out of 947 [2023-08-04 02:04:15,485 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 63 transitions, 254 flow. Second operand has 5 states, 5 states have (on average 388.8) internal successors, (1944), 5 states have internal predecessors, (1944), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:04:15,485 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 02:04:15,485 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 382 of 947 [2023-08-04 02:04:15,485 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 02:04:19,105 INFO L124 PetriNetUnfolderBase]: 17145/27047 cut-off events. [2023-08-04 02:04:19,105 INFO L125 PetriNetUnfolderBase]: For 4623/4623 co-relation queries the response was YES. [2023-08-04 02:04:19,160 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61509 conditions, 27047 events. 17145/27047 cut-off events. For 4623/4623 co-relation queries the response was YES. Maximal size of possible extension queue 728. Compared 179644 event pairs, 10068 based on Foata normal form. 8/27034 useless extension candidates. Maximal degree in co-relation 45955. Up to 24835 conditions per place. [2023-08-04 02:04:19,217 INFO L140 encePairwiseOnDemand]: 943/947 looper letters, 61 selfloop transitions, 3 changer transitions 1/72 dead transitions. [2023-08-04 02:04:19,217 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 72 transitions, 402 flow [2023-08-04 02:04:19,218 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 02:04:19,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 02:04:19,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1589 transitions. [2023-08-04 02:04:19,220 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41948257655755017 [2023-08-04 02:04:19,220 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1589 transitions. [2023-08-04 02:04:19,220 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1589 transitions. [2023-08-04 02:04:19,221 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 02:04:19,221 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1589 transitions. [2023-08-04 02:04:19,222 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 397.25) internal successors, (1589), 4 states have internal predecessors, (1589), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:04:19,224 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 947.0) internal successors, (4735), 5 states have internal predecessors, (4735), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:04:19,225 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 947.0) internal successors, (4735), 5 states have internal predecessors, (4735), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:04:19,225 INFO L175 Difference]: Start difference. First operand has 66 places, 63 transitions, 254 flow. Second operand 4 states and 1589 transitions. [2023-08-04 02:04:19,225 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 72 transitions, 402 flow [2023-08-04 02:04:19,366 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 72 transitions, 392 flow, removed 1 selfloop flow, removed 3 redundant places. [2023-08-04 02:04:19,367 INFO L231 Difference]: Finished difference. Result has 68 places, 63 transitions, 258 flow [2023-08-04 02:04:19,367 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=947, PETRI_DIFFERENCE_MINUEND_FLOW=244, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=63, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=258, PETRI_PLACES=68, PETRI_TRANSITIONS=63} [2023-08-04 02:04:19,367 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 12 predicate places. [2023-08-04 02:04:19,367 INFO L495 AbstractCegarLoop]: Abstraction has has 68 places, 63 transitions, 258 flow [2023-08-04 02:04:19,367 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 388.8) internal successors, (1944), 5 states have internal predecessors, (1944), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:04:19,367 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 02:04:19,368 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 02:04:19,373 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-08-04 02:04:19,572 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2023-08-04 02:04:19,572 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 02:04:19,573 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 02:04:19,573 INFO L85 PathProgramCache]: Analyzing trace with hash 541840519, now seen corresponding path program 1 times [2023-08-04 02:04:19,573 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 02:04:19,573 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [580162558] [2023-08-04 02:04:19,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 02:04:19,573 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 02:04:19,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 02:04:19,621 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-08-04 02:04:19,621 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 02:04:19,621 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [580162558] [2023-08-04 02:04:19,622 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [580162558] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 02:04:19,622 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [554168610] [2023-08-04 02:04:19,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 02:04:19,622 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 02:04:19,622 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 02:04:19,623 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 02:04:19,625 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-08-04 02:04:19,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 02:04:19,728 INFO L262 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-04 02:04:19,729 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 02:04:19,737 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-08-04 02:04:19,738 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 02:04:19,747 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-08-04 02:04:19,747 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [554168610] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 02:04:19,747 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 02:04:19,747 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 5 [2023-08-04 02:04:19,747 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1278922173] [2023-08-04 02:04:19,747 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 02:04:19,747 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 02:04:19,748 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 02:04:19,748 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 02:04:19,748 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-04 02:04:19,758 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 382 out of 947 [2023-08-04 02:04:19,759 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 63 transitions, 258 flow. Second operand has 5 states, 5 states have (on average 389.0) internal successors, (1945), 5 states have internal predecessors, (1945), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:04:19,759 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 02:04:19,759 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 382 of 947 [2023-08-04 02:04:19,759 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 02:04:24,118 INFO L124 PetriNetUnfolderBase]: 16713/26375 cut-off events. [2023-08-04 02:04:24,118 INFO L125 PetriNetUnfolderBase]: For 4364/4364 co-relation queries the response was YES. [2023-08-04 02:04:24,166 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59321 conditions, 26375 events. 16713/26375 cut-off events. For 4364/4364 co-relation queries the response was YES. Maximal size of possible extension queue 702. Compared 173627 event pairs, 9727 based on Foata normal form. 32/26386 useless extension candidates. Maximal degree in co-relation 43949. Up to 23507 conditions per place. [2023-08-04 02:04:24,221 INFO L140 encePairwiseOnDemand]: 943/947 looper letters, 65 selfloop transitions, 3 changer transitions 1/76 dead transitions. [2023-08-04 02:04:24,222 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 76 transitions, 422 flow [2023-08-04 02:04:24,222 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 02:04:24,222 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 02:04:24,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1593 transitions. [2023-08-04 02:04:24,225 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42053854276663144 [2023-08-04 02:04:24,225 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1593 transitions. [2023-08-04 02:04:24,225 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1593 transitions. [2023-08-04 02:04:24,226 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 02:04:24,226 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1593 transitions. [2023-08-04 02:04:24,228 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 398.25) internal successors, (1593), 4 states have internal predecessors, (1593), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:04:24,231 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 947.0) internal successors, (4735), 5 states have internal predecessors, (4735), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:04:24,231 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 947.0) internal successors, (4735), 5 states have internal predecessors, (4735), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:04:24,231 INFO L175 Difference]: Start difference. First operand has 68 places, 63 transitions, 258 flow. Second operand 4 states and 1593 transitions. [2023-08-04 02:04:24,231 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 76 transitions, 422 flow [2023-08-04 02:04:24,387 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 76 transitions, 412 flow, removed 1 selfloop flow, removed 3 redundant places. [2023-08-04 02:04:24,387 INFO L231 Difference]: Finished difference. Result has 70 places, 63 transitions, 262 flow [2023-08-04 02:04:24,388 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=947, PETRI_DIFFERENCE_MINUEND_FLOW=248, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=63, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=262, PETRI_PLACES=70, PETRI_TRANSITIONS=63} [2023-08-04 02:04:24,388 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 14 predicate places. [2023-08-04 02:04:24,388 INFO L495 AbstractCegarLoop]: Abstraction has has 70 places, 63 transitions, 262 flow [2023-08-04 02:04:24,388 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 389.0) internal successors, (1945), 5 states have internal predecessors, (1945), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:04:24,388 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 02:04:24,388 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 02:04:24,395 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-08-04 02:04:24,593 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2023-08-04 02:04:24,593 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 02:04:24,594 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 02:04:24,594 INFO L85 PathProgramCache]: Analyzing trace with hash 1793699712, now seen corresponding path program 1 times [2023-08-04 02:04:24,594 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 02:04:24,594 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2088153254] [2023-08-04 02:04:24,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 02:04:24,594 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 02:04:24,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 02:04:24,650 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2023-08-04 02:04:24,650 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 02:04:24,650 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2088153254] [2023-08-04 02:04:24,651 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2088153254] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 02:04:24,651 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1999114232] [2023-08-04 02:04:24,651 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 02:04:24,651 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 02:04:24,651 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 02:04:24,652 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 02:04:24,654 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-08-04 02:04:24,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 02:04:24,759 INFO L262 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-04 02:04:24,760 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 02:04:24,767 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2023-08-04 02:04:24,767 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 02:04:24,776 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2023-08-04 02:04:24,776 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1999114232] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 02:04:24,776 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 02:04:24,777 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 5 [2023-08-04 02:04:24,777 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1860323055] [2023-08-04 02:04:24,777 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 02:04:24,777 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 02:04:24,777 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 02:04:24,777 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 02:04:24,777 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-04 02:04:24,787 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 382 out of 947 [2023-08-04 02:04:24,788 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 70 places, 63 transitions, 262 flow. Second operand has 5 states, 5 states have (on average 389.2) internal successors, (1946), 5 states have internal predecessors, (1946), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:04:24,788 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 02:04:24,788 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 382 of 947 [2023-08-04 02:04:24,788 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 02:04:27,034 INFO L124 PetriNetUnfolderBase]: 10381/16595 cut-off events. [2023-08-04 02:04:27,034 INFO L125 PetriNetUnfolderBase]: For 3584/3584 co-relation queries the response was YES. [2023-08-04 02:04:27,086 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37278 conditions, 16595 events. 10381/16595 cut-off events. For 3584/3584 co-relation queries the response was YES. Maximal size of possible extension queue 465. Compared 100977 event pairs, 5440 based on Foata normal form. 192/16766 useless extension candidates. Maximal degree in co-relation 32048. Up to 9564 conditions per place. [2023-08-04 02:04:27,118 INFO L140 encePairwiseOnDemand]: 943/947 looper letters, 72 selfloop transitions, 4 changer transitions 0/83 dead transitions. [2023-08-04 02:04:27,119 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 83 transitions, 467 flow [2023-08-04 02:04:27,119 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 02:04:27,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 02:04:27,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1600 transitions. [2023-08-04 02:04:27,121 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42238648363252373 [2023-08-04 02:04:27,121 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1600 transitions. [2023-08-04 02:04:27,121 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1600 transitions. [2023-08-04 02:04:27,122 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 02:04:27,122 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1600 transitions. [2023-08-04 02:04:27,124 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 400.0) internal successors, (1600), 4 states have internal predecessors, (1600), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:04:27,126 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 947.0) internal successors, (4735), 5 states have internal predecessors, (4735), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:04:27,126 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 947.0) internal successors, (4735), 5 states have internal predecessors, (4735), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:04:27,126 INFO L175 Difference]: Start difference. First operand has 70 places, 63 transitions, 262 flow. Second operand 4 states and 1600 transitions. [2023-08-04 02:04:27,126 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 83 transitions, 467 flow [2023-08-04 02:04:27,219 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 83 transitions, 456 flow, removed 1 selfloop flow, removed 3 redundant places. [2023-08-04 02:04:27,220 INFO L231 Difference]: Finished difference. Result has 72 places, 64 transitions, 272 flow [2023-08-04 02:04:27,221 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=947, PETRI_DIFFERENCE_MINUEND_FLOW=252, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=63, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=272, PETRI_PLACES=72, PETRI_TRANSITIONS=64} [2023-08-04 02:04:27,221 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 16 predicate places. [2023-08-04 02:04:27,221 INFO L495 AbstractCegarLoop]: Abstraction has has 72 places, 64 transitions, 272 flow [2023-08-04 02:04:27,221 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 389.2) internal successors, (1946), 5 states have internal predecessors, (1946), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:04:27,222 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 02:04:27,222 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 02:04:27,228 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2023-08-04 02:04:27,425 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2023-08-04 02:04:27,425 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 02:04:27,425 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 02:04:27,425 INFO L85 PathProgramCache]: Analyzing trace with hash -1453445475, now seen corresponding path program 1 times [2023-08-04 02:04:27,426 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 02:04:27,426 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2010911363] [2023-08-04 02:04:27,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 02:04:27,426 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 02:04:27,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 02:04:27,493 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2023-08-04 02:04:27,493 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 02:04:27,494 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2010911363] [2023-08-04 02:04:27,494 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2010911363] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 02:04:27,494 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [962811431] [2023-08-04 02:04:27,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 02:04:27,494 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 02:04:27,494 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 02:04:27,495 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 02:04:27,517 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-08-04 02:04:27,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 02:04:27,630 INFO L262 TraceCheckSpWp]: Trace formula consists of 217 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-04 02:04:27,631 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 02:04:27,640 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2023-08-04 02:04:27,640 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 02:04:27,649 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2023-08-04 02:04:27,649 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [962811431] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 02:04:27,649 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 02:04:27,649 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 5 [2023-08-04 02:04:27,649 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2095413407] [2023-08-04 02:04:27,649 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 02:04:27,650 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 02:04:27,650 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 02:04:27,650 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 02:04:27,650 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-04 02:04:27,659 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 382 out of 947 [2023-08-04 02:04:27,660 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 64 transitions, 272 flow. Second operand has 5 states, 5 states have (on average 389.6) internal successors, (1948), 5 states have internal predecessors, (1948), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:04:27,660 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 02:04:27,660 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 382 of 947 [2023-08-04 02:04:27,660 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 02:04:29,737 INFO L124 PetriNetUnfolderBase]: 9421/14944 cut-off events. [2023-08-04 02:04:29,737 INFO L125 PetriNetUnfolderBase]: For 6527/6527 co-relation queries the response was YES. [2023-08-04 02:04:29,800 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35816 conditions, 14944 events. 9421/14944 cut-off events. For 6527/6527 co-relation queries the response was YES. Maximal size of possible extension queue 409. Compared 88182 event pairs, 5948 based on Foata normal form. 233/15156 useless extension candidates. Maximal degree in co-relation 34698. Up to 8751 conditions per place. [2023-08-04 02:04:29,838 INFO L140 encePairwiseOnDemand]: 943/947 looper letters, 73 selfloop transitions, 4 changer transitions 0/84 dead transitions. [2023-08-04 02:04:29,838 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 84 transitions, 478 flow [2023-08-04 02:04:29,838 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 02:04:29,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 02:04:29,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1600 transitions. [2023-08-04 02:04:29,841 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42238648363252373 [2023-08-04 02:04:29,841 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1600 transitions. [2023-08-04 02:04:29,842 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1600 transitions. [2023-08-04 02:04:29,842 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 02:04:29,842 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1600 transitions. [2023-08-04 02:04:29,844 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 400.0) internal successors, (1600), 4 states have internal predecessors, (1600), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:04:29,847 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 947.0) internal successors, (4735), 5 states have internal predecessors, (4735), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:04:29,847 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 947.0) internal successors, (4735), 5 states have internal predecessors, (4735), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:04:29,847 INFO L175 Difference]: Start difference. First operand has 72 places, 64 transitions, 272 flow. Second operand 4 states and 1600 transitions. [2023-08-04 02:04:29,847 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 84 transitions, 478 flow [2023-08-04 02:04:29,916 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 84 transitions, 474 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-08-04 02:04:29,917 INFO L231 Difference]: Finished difference. Result has 76 places, 65 transitions, 288 flow [2023-08-04 02:04:29,917 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=947, PETRI_DIFFERENCE_MINUEND_FLOW=268, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=64, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=288, PETRI_PLACES=76, PETRI_TRANSITIONS=65} [2023-08-04 02:04:29,918 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 20 predicate places. [2023-08-04 02:04:29,918 INFO L495 AbstractCegarLoop]: Abstraction has has 76 places, 65 transitions, 288 flow [2023-08-04 02:04:29,918 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 389.6) internal successors, (1948), 5 states have internal predecessors, (1948), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:04:29,918 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 02:04:29,918 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 02:04:29,923 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2023-08-04 02:04:30,123 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 02:04:30,124 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 02:04:30,124 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 02:04:30,124 INFO L85 PathProgramCache]: Analyzing trace with hash -1882110843, now seen corresponding path program 1 times [2023-08-04 02:04:30,124 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 02:04:30,124 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1469286970] [2023-08-04 02:04:30,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 02:04:30,124 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 02:04:30,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 02:04:30,185 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2023-08-04 02:04:30,186 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 02:04:30,186 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1469286970] [2023-08-04 02:04:30,186 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1469286970] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 02:04:30,186 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [673487253] [2023-08-04 02:04:30,186 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 02:04:30,186 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 02:04:30,186 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 02:04:30,201 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 02:04:30,202 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-08-04 02:04:30,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 02:04:30,321 INFO L262 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-04 02:04:30,322 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 02:04:30,330 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2023-08-04 02:04:30,331 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 02:04:30,340 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2023-08-04 02:04:30,340 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [673487253] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 02:04:30,340 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 02:04:30,340 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 5 [2023-08-04 02:04:30,340 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1155401154] [2023-08-04 02:04:30,340 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 02:04:30,340 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 02:04:30,340 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 02:04:30,341 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 02:04:30,341 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-04 02:04:30,350 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 382 out of 947 [2023-08-04 02:04:30,351 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 65 transitions, 288 flow. Second operand has 5 states, 5 states have (on average 390.0) internal successors, (1950), 5 states have internal predecessors, (1950), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:04:30,351 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 02:04:30,351 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 382 of 947 [2023-08-04 02:04:30,351 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 02:04:32,394 INFO L124 PetriNetUnfolderBase]: 9409/14897 cut-off events. [2023-08-04 02:04:32,394 INFO L125 PetriNetUnfolderBase]: For 7481/7481 co-relation queries the response was YES. [2023-08-04 02:04:32,442 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37437 conditions, 14897 events. 9409/14897 cut-off events. For 7481/7481 co-relation queries the response was YES. Maximal size of possible extension queue 409. Compared 87869 event pairs, 8414 based on Foata normal form. 13/14889 useless extension candidates. Maximal degree in co-relation 36338. Up to 13454 conditions per place. [2023-08-04 02:04:32,470 INFO L140 encePairwiseOnDemand]: 943/947 looper letters, 72 selfloop transitions, 3 changer transitions 3/85 dead transitions. [2023-08-04 02:04:32,470 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 85 transitions, 496 flow [2023-08-04 02:04:32,470 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 02:04:32,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 02:04:32,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1600 transitions. [2023-08-04 02:04:32,472 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42238648363252373 [2023-08-04 02:04:32,472 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1600 transitions. [2023-08-04 02:04:32,472 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1600 transitions. [2023-08-04 02:04:32,473 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 02:04:32,473 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1600 transitions. [2023-08-04 02:04:32,475 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 400.0) internal successors, (1600), 4 states have internal predecessors, (1600), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:04:32,476 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 947.0) internal successors, (4735), 5 states have internal predecessors, (4735), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:04:32,477 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 947.0) internal successors, (4735), 5 states have internal predecessors, (4735), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:04:32,477 INFO L175 Difference]: Start difference. First operand has 76 places, 65 transitions, 288 flow. Second operand 4 states and 1600 transitions. [2023-08-04 02:04:32,477 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 85 transitions, 496 flow [2023-08-04 02:04:32,636 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 78 places, 85 transitions, 492 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-08-04 02:04:32,637 INFO L231 Difference]: Finished difference. Result has 80 places, 63 transitions, 286 flow [2023-08-04 02:04:32,637 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=947, PETRI_DIFFERENCE_MINUEND_FLOW=284, PETRI_DIFFERENCE_MINUEND_PLACES=75, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=65, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=286, PETRI_PLACES=80, PETRI_TRANSITIONS=63} [2023-08-04 02:04:32,638 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 24 predicate places. [2023-08-04 02:04:32,638 INFO L495 AbstractCegarLoop]: Abstraction has has 80 places, 63 transitions, 286 flow [2023-08-04 02:04:32,638 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 390.0) internal successors, (1950), 5 states have internal predecessors, (1950), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:04:32,638 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 02:04:32,638 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 02:04:32,646 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2023-08-04 02:04:32,844 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 02:04:32,845 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 02:04:32,845 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 02:04:32,845 INFO L85 PathProgramCache]: Analyzing trace with hash -1296837906, now seen corresponding path program 1 times [2023-08-04 02:04:32,845 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 02:04:32,845 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [763542867] [2023-08-04 02:04:32,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 02:04:32,845 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 02:04:33,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 02:04:37,372 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2023-08-04 02:04:37,372 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 02:04:37,372 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [763542867] [2023-08-04 02:04:37,372 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [763542867] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 02:04:37,372 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [885692693] [2023-08-04 02:04:37,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 02:04:37,373 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 02:04:37,373 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 02:04:37,374 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 02:04:37,388 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-08-04 02:04:37,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 02:04:37,531 INFO L262 TraceCheckSpWp]: Trace formula consists of 235 conjuncts, 13 conjunts are in the unsatisfiable core [2023-08-04 02:04:37,535 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 02:04:42,312 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2023-08-04 02:04:42,312 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 02:04:46,148 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2023-08-04 02:04:46,148 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [885692693] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 02:04:46,148 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 02:04:46,149 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2023-08-04 02:04:46,149 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2005789525] [2023-08-04 02:04:46,149 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 02:04:46,149 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-08-04 02:04:46,149 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 02:04:46,149 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-08-04 02:04:46,150 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2023-08-04 02:04:47,595 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 336 out of 947 [2023-08-04 02:04:47,596 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 80 places, 63 transitions, 286 flow. Second operand has 12 states, 12 states have (on average 343.0833333333333) internal successors, (4117), 12 states have internal predecessors, (4117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:04:47,597 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 02:04:47,597 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 336 of 947 [2023-08-04 02:04:47,597 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 02:04:53,026 INFO L124 PetriNetUnfolderBase]: 15094/24049 cut-off events. [2023-08-04 02:04:53,026 INFO L125 PetriNetUnfolderBase]: For 16657/16657 co-relation queries the response was YES. [2023-08-04 02:04:53,148 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60058 conditions, 24049 events. 15094/24049 cut-off events. For 16657/16657 co-relation queries the response was YES. Maximal size of possible extension queue 684. Compared 163300 event pairs, 1442 based on Foata normal form. 2/23909 useless extension candidates. Maximal degree in co-relation 59945. Up to 6570 conditions per place. [2023-08-04 02:04:53,185 INFO L140 encePairwiseOnDemand]: 938/947 looper letters, 160 selfloop transitions, 13 changer transitions 93/273 dead transitions. [2023-08-04 02:04:53,185 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 89 places, 273 transitions, 1819 flow [2023-08-04 02:04:53,186 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-08-04 02:04:53,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-08-04 02:04:53,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 3599 transitions. [2023-08-04 02:04:53,190 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38004223864836323 [2023-08-04 02:04:53,190 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 3599 transitions. [2023-08-04 02:04:53,190 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 3599 transitions. [2023-08-04 02:04:53,192 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 02:04:53,192 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 3599 transitions. [2023-08-04 02:04:53,197 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 359.9) internal successors, (3599), 10 states have internal predecessors, (3599), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:04:53,202 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 947.0) internal successors, (10417), 11 states have internal predecessors, (10417), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:04:53,203 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 947.0) internal successors, (10417), 11 states have internal predecessors, (10417), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:04:53,203 INFO L175 Difference]: Start difference. First operand has 80 places, 63 transitions, 286 flow. Second operand 10 states and 3599 transitions. [2023-08-04 02:04:53,203 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 89 places, 273 transitions, 1819 flow [2023-08-04 02:04:53,699 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 85 places, 273 transitions, 1769 flow, removed 4 selfloop flow, removed 4 redundant places. [2023-08-04 02:04:53,701 INFO L231 Difference]: Finished difference. Result has 94 places, 75 transitions, 400 flow [2023-08-04 02:04:53,702 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=947, PETRI_DIFFERENCE_MINUEND_FLOW=276, PETRI_DIFFERENCE_MINUEND_PLACES=76, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=63, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=400, PETRI_PLACES=94, PETRI_TRANSITIONS=75} [2023-08-04 02:04:53,702 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 38 predicate places. [2023-08-04 02:04:53,702 INFO L495 AbstractCegarLoop]: Abstraction has has 94 places, 75 transitions, 400 flow [2023-08-04 02:04:53,703 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 343.0833333333333) internal successors, (4117), 12 states have internal predecessors, (4117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:04:53,703 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 02:04:53,707 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 02:04:53,714 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2023-08-04 02:04:53,912 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 02:04:53,912 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 02:04:53,913 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 02:04:53,913 INFO L85 PathProgramCache]: Analyzing trace with hash 870674806, now seen corresponding path program 2 times [2023-08-04 02:04:53,913 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 02:04:53,913 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [687578699] [2023-08-04 02:04:53,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 02:04:53,913 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 02:04:54,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 02:04:56,329 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2023-08-04 02:04:56,329 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 02:04:56,329 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [687578699] [2023-08-04 02:04:56,329 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [687578699] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 02:04:56,329 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [872635971] [2023-08-04 02:04:56,329 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-04 02:04:56,329 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 02:04:56,330 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 02:04:56,331 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 02:04:56,333 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2023-08-04 02:04:56,452 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-04 02:04:56,452 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-04 02:04:56,453 INFO L262 TraceCheckSpWp]: Trace formula consists of 235 conjuncts, 13 conjunts are in the unsatisfiable core [2023-08-04 02:04:56,457 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 02:04:59,190 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2023-08-04 02:04:59,190 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 02:05:01,019 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2023-08-04 02:05:01,020 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [872635971] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 02:05:01,020 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 02:05:01,020 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 13 [2023-08-04 02:05:01,020 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [730159659] [2023-08-04 02:05:01,020 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 02:05:01,022 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-08-04 02:05:01,022 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 02:05:01,023 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-08-04 02:05:01,023 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2023-08-04 02:05:03,003 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 336 out of 947 [2023-08-04 02:05:03,005 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 94 places, 75 transitions, 400 flow. Second operand has 13 states, 13 states have (on average 341.53846153846155) internal successors, (4440), 13 states have internal predecessors, (4440), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:05:03,005 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 02:05:03,005 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 336 of 947 [2023-08-04 02:05:03,005 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 02:05:08,726 INFO L124 PetriNetUnfolderBase]: 15274/25592 cut-off events. [2023-08-04 02:05:08,726 INFO L125 PetriNetUnfolderBase]: For 77411/77411 co-relation queries the response was YES. [2023-08-04 02:05:08,798 INFO L83 FinitePrefix]: Finished finitePrefix Result has 97773 conditions, 25592 events. 15274/25592 cut-off events. For 77411/77411 co-relation queries the response was YES. Maximal size of possible extension queue 788. Compared 189348 event pairs, 2391 based on Foata normal form. 1/25486 useless extension candidates. Maximal degree in co-relation 97732. Up to 10924 conditions per place. [2023-08-04 02:05:08,837 INFO L140 encePairwiseOnDemand]: 938/947 looper letters, 136 selfloop transitions, 9 changer transitions 74/226 dead transitions. [2023-08-04 02:05:08,837 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 97 places, 226 transitions, 1667 flow [2023-08-04 02:05:08,838 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-08-04 02:05:08,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-08-04 02:05:08,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 2882 transitions. [2023-08-04 02:05:08,841 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38041182682154173 [2023-08-04 02:05:08,841 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 2882 transitions. [2023-08-04 02:05:08,841 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 2882 transitions. [2023-08-04 02:05:08,841 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 02:05:08,841 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 2882 transitions. [2023-08-04 02:05:08,844 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 360.25) internal successors, (2882), 8 states have internal predecessors, (2882), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:05:08,861 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 947.0) internal successors, (8523), 9 states have internal predecessors, (8523), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:05:08,862 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 947.0) internal successors, (8523), 9 states have internal predecessors, (8523), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:05:08,862 INFO L175 Difference]: Start difference. First operand has 94 places, 75 transitions, 400 flow. Second operand 8 states and 2882 transitions. [2023-08-04 02:05:08,862 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 97 places, 226 transitions, 1667 flow [2023-08-04 02:05:09,370 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 95 places, 226 transitions, 1659 flow, removed 4 selfloop flow, removed 2 redundant places. [2023-08-04 02:05:09,372 INFO L231 Difference]: Finished difference. Result has 99 places, 73 transitions, 428 flow [2023-08-04 02:05:09,372 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=947, PETRI_DIFFERENCE_MINUEND_FLOW=396, PETRI_DIFFERENCE_MINUEND_PLACES=88, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=75, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=66, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=428, PETRI_PLACES=99, PETRI_TRANSITIONS=73} [2023-08-04 02:05:09,373 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 43 predicate places. [2023-08-04 02:05:09,373 INFO L495 AbstractCegarLoop]: Abstraction has has 99 places, 73 transitions, 428 flow [2023-08-04 02:05:09,373 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 341.53846153846155) internal successors, (4440), 13 states have internal predecessors, (4440), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:05:09,373 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 02:05:09,373 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 02:05:09,378 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2023-08-04 02:05:09,578 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 02:05:09,578 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 02:05:09,579 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 02:05:09,579 INFO L85 PathProgramCache]: Analyzing trace with hash -1689828274, now seen corresponding path program 1 times [2023-08-04 02:05:09,579 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 02:05:09,579 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1774408676] [2023-08-04 02:05:09,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 02:05:09,579 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 02:05:09,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 02:05:10,286 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 2 proven. 14 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2023-08-04 02:05:10,286 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 02:05:10,286 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1774408676] [2023-08-04 02:05:10,286 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1774408676] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 02:05:10,286 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [796591638] [2023-08-04 02:05:10,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 02:05:10,286 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 02:05:10,287 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 02:05:10,288 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 02:05:10,290 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2023-08-04 02:05:10,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 02:05:10,429 INFO L262 TraceCheckSpWp]: Trace formula consists of 235 conjuncts, 13 conjunts are in the unsatisfiable core [2023-08-04 02:05:10,431 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 02:05:14,284 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2023-08-04 02:05:14,284 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 02:05:15,826 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2023-08-04 02:05:15,826 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [796591638] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 02:05:15,826 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 02:05:15,826 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 6, 6] total 19 [2023-08-04 02:05:15,826 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1194736586] [2023-08-04 02:05:15,826 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 02:05:15,827 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-08-04 02:05:15,827 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 02:05:15,827 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-08-04 02:05:15,827 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=296, Unknown=0, NotChecked=0, Total=342 [2023-08-04 02:05:18,784 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 338 out of 947 [2023-08-04 02:05:18,787 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 99 places, 73 transitions, 428 flow. Second operand has 19 states, 19 states have (on average 343.94736842105266) internal successors, (6535), 19 states have internal predecessors, (6535), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:05:18,787 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 02:05:18,787 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 338 of 947 [2023-08-04 02:05:18,787 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 02:05:29,992 INFO L124 PetriNetUnfolderBase]: 18158/30822 cut-off events. [2023-08-04 02:05:29,992 INFO L125 PetriNetUnfolderBase]: For 142107/142107 co-relation queries the response was YES. [2023-08-04 02:05:30,174 INFO L83 FinitePrefix]: Finished finitePrefix Result has 129730 conditions, 30822 events. 18158/30822 cut-off events. For 142107/142107 co-relation queries the response was YES. Maximal size of possible extension queue 956. Compared 237713 event pairs, 3143 based on Foata normal form. 113/30917 useless extension candidates. Maximal degree in co-relation 129689. Up to 10984 conditions per place. [2023-08-04 02:05:30,221 INFO L140 encePairwiseOnDemand]: 928/947 looper letters, 224 selfloop transitions, 87 changer transitions 18/334 dead transitions. [2023-08-04 02:05:30,221 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 119 places, 334 transitions, 2893 flow [2023-08-04 02:05:30,221 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2023-08-04 02:05:30,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2023-08-04 02:05:30,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 8719 transitions. [2023-08-04 02:05:30,229 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3682787750791975 [2023-08-04 02:05:30,229 INFO L72 ComplementDD]: Start complementDD. Operand 25 states and 8719 transitions. [2023-08-04 02:05:30,229 INFO L73 IsDeterministic]: Start isDeterministic. Operand 25 states and 8719 transitions. [2023-08-04 02:05:30,231 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 02:05:30,231 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 25 states and 8719 transitions. [2023-08-04 02:05:30,237 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 26 states, 25 states have (on average 348.76) internal successors, (8719), 25 states have internal predecessors, (8719), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:05:30,248 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 26 states, 26 states have (on average 947.0) internal successors, (24622), 26 states have internal predecessors, (24622), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:05:30,249 INFO L81 ComplementDD]: Finished complementDD. Result has 26 states, 26 states have (on average 947.0) internal successors, (24622), 26 states have internal predecessors, (24622), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:05:30,249 INFO L175 Difference]: Start difference. First operand has 99 places, 73 transitions, 428 flow. Second operand 25 states and 8719 transitions. [2023-08-04 02:05:30,249 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 119 places, 334 transitions, 2893 flow [2023-08-04 02:05:31,031 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 114 places, 334 transitions, 2667 flow, removed 89 selfloop flow, removed 5 redundant places. [2023-08-04 02:05:31,034 INFO L231 Difference]: Finished difference. Result has 130 places, 151 transitions, 1378 flow [2023-08-04 02:05:31,034 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=947, PETRI_DIFFERENCE_MINUEND_FLOW=396, PETRI_DIFFERENCE_MINUEND_PLACES=90, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=73, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=25, PETRI_FLOW=1378, PETRI_PLACES=130, PETRI_TRANSITIONS=151} [2023-08-04 02:05:31,034 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 74 predicate places. [2023-08-04 02:05:31,034 INFO L495 AbstractCegarLoop]: Abstraction has has 130 places, 151 transitions, 1378 flow [2023-08-04 02:05:31,035 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 343.94736842105266) internal successors, (6535), 19 states have internal predecessors, (6535), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:05:31,035 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 02:05:31,035 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 02:05:31,046 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2023-08-04 02:05:31,240 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 02:05:31,241 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 02:05:31,241 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 02:05:31,241 INFO L85 PathProgramCache]: Analyzing trace with hash 1746556236, now seen corresponding path program 2 times [2023-08-04 02:05:31,241 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 02:05:31,241 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [630699769] [2023-08-04 02:05:31,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 02:05:31,242 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 02:05:31,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 02:05:31,838 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2023-08-04 02:05:31,838 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 02:05:31,838 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [630699769] [2023-08-04 02:05:31,838 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [630699769] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 02:05:31,839 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1604178903] [2023-08-04 02:05:31,839 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-04 02:05:31,839 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 02:05:31,839 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 02:05:31,850 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 02:05:31,854 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2023-08-04 02:05:31,994 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-04 02:05:31,994 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-04 02:05:31,996 INFO L262 TraceCheckSpWp]: Trace formula consists of 235 conjuncts, 19 conjunts are in the unsatisfiable core [2023-08-04 02:05:31,999 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 02:05:40,836 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2023-08-04 02:05:40,836 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 02:05:46,703 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2023-08-04 02:05:46,703 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1604178903] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 02:05:46,703 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 02:05:46,703 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 6, 6] total 19 [2023-08-04 02:05:46,703 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1928782491] [2023-08-04 02:05:46,703 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 02:05:46,703 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-08-04 02:05:46,704 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 02:05:46,704 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-08-04 02:05:46,704 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=292, Unknown=0, NotChecked=0, Total=342 [2023-08-04 02:05:49,964 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 341 out of 947 [2023-08-04 02:05:49,966 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 130 places, 151 transitions, 1378 flow. Second operand has 19 states, 19 states have (on average 347.1578947368421) internal successors, (6596), 19 states have internal predecessors, (6596), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:05:49,966 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 02:05:49,966 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 341 of 947 [2023-08-04 02:05:49,966 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 02:06:05,684 INFO L124 PetriNetUnfolderBase]: 18805/33267 cut-off events. [2023-08-04 02:06:05,684 INFO L125 PetriNetUnfolderBase]: For 324708/325220 co-relation queries the response was YES. [2023-08-04 02:06:05,961 INFO L83 FinitePrefix]: Finished finitePrefix Result has 179596 conditions, 33267 events. 18805/33267 cut-off events. For 324708/325220 co-relation queries the response was YES. Maximal size of possible extension queue 1076. Compared 269547 event pairs, 1664 based on Foata normal form. 235/33485 useless extension candidates. Maximal degree in co-relation 179542. Up to 16607 conditions per place. [2023-08-04 02:06:06,006 INFO L140 encePairwiseOnDemand]: 928/947 looper letters, 155 selfloop transitions, 73 changer transitions 300/536 dead transitions. [2023-08-04 02:06:06,006 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 175 places, 536 transitions, 6289 flow [2023-08-04 02:06:06,007 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2023-08-04 02:06:06,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2023-08-04 02:06:06,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 16397 transitions. [2023-08-04 02:06:06,018 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36839740277247296 [2023-08-04 02:06:06,018 INFO L72 ComplementDD]: Start complementDD. Operand 47 states and 16397 transitions. [2023-08-04 02:06:06,018 INFO L73 IsDeterministic]: Start isDeterministic. Operand 47 states and 16397 transitions. [2023-08-04 02:06:06,021 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 02:06:06,021 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 47 states and 16397 transitions. [2023-08-04 02:06:06,034 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 48 states, 47 states have (on average 348.8723404255319) internal successors, (16397), 47 states have internal predecessors, (16397), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:06:06,056 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 48 states, 48 states have (on average 947.0) internal successors, (45456), 48 states have internal predecessors, (45456), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:06:06,061 INFO L81 ComplementDD]: Finished complementDD. Result has 48 states, 48 states have (on average 947.0) internal successors, (45456), 48 states have internal predecessors, (45456), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:06:06,061 INFO L175 Difference]: Start difference. First operand has 130 places, 151 transitions, 1378 flow. Second operand 47 states and 16397 transitions. [2023-08-04 02:06:06,061 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 175 places, 536 transitions, 6289 flow [2023-08-04 02:06:07,528 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 168 places, 536 transitions, 6066 flow, removed 79 selfloop flow, removed 7 redundant places. [2023-08-04 02:06:07,532 INFO L231 Difference]: Finished difference. Result has 180 places, 147 transitions, 1392 flow [2023-08-04 02:06:07,533 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=947, PETRI_DIFFERENCE_MINUEND_FLOW=1266, PETRI_DIFFERENCE_MINUEND_PLACES=122, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=151, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=119, PETRI_DIFFERENCE_SUBTRAHEND_STATES=47, PETRI_FLOW=1392, PETRI_PLACES=180, PETRI_TRANSITIONS=147} [2023-08-04 02:06:07,533 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 124 predicate places. [2023-08-04 02:06:07,533 INFO L495 AbstractCegarLoop]: Abstraction has has 180 places, 147 transitions, 1392 flow [2023-08-04 02:06:07,534 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 347.1578947368421) internal successors, (6596), 19 states have internal predecessors, (6596), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:06:07,534 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 02:06:07,534 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 02:06:07,544 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2023-08-04 02:06:07,740 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 02:06:07,740 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 02:06:07,740 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 02:06:07,740 INFO L85 PathProgramCache]: Analyzing trace with hash 1685612424, now seen corresponding path program 3 times [2023-08-04 02:06:07,741 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 02:06:07,741 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1365412857] [2023-08-04 02:06:07,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 02:06:07,741 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 02:06:07,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 02:06:10,748 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2023-08-04 02:06:10,749 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 02:06:10,749 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1365412857] [2023-08-04 02:06:10,749 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1365412857] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 02:06:10,749 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 02:06:10,749 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-08-04 02:06:10,749 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [294194237] [2023-08-04 02:06:10,749 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 02:06:10,749 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-04 02:06:10,750 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 02:06:10,750 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-04 02:06:10,750 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2023-08-04 02:06:11,610 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 360 out of 947 [2023-08-04 02:06:11,612 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 180 places, 147 transitions, 1392 flow. Second operand has 7 states, 7 states have (on average 365.57142857142856) internal successors, (2559), 7 states have internal predecessors, (2559), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:06:11,612 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 02:06:11,612 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 360 of 947 [2023-08-04 02:06:11,612 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 02:06:15,443 INFO L124 PetriNetUnfolderBase]: 8109/15258 cut-off events. [2023-08-04 02:06:15,443 INFO L125 PetriNetUnfolderBase]: For 243589/244114 co-relation queries the response was YES. [2023-08-04 02:06:15,544 INFO L83 FinitePrefix]: Finished finitePrefix Result has 92411 conditions, 15258 events. 8109/15258 cut-off events. For 243589/244114 co-relation queries the response was YES. Maximal size of possible extension queue 560. Compared 121620 event pairs, 1231 based on Foata normal form. 159/15359 useless extension candidates. Maximal degree in co-relation 92351. Up to 6886 conditions per place. [2023-08-04 02:06:15,569 INFO L140 encePairwiseOnDemand]: 938/947 looper letters, 127 selfloop transitions, 49 changer transitions 9/202 dead transitions. [2023-08-04 02:06:15,569 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 157 places, 202 transitions, 2172 flow [2023-08-04 02:06:15,569 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-04 02:06:15,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-04 02:06:15,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 2632 transitions. [2023-08-04 02:06:15,571 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39704329461457233 [2023-08-04 02:06:15,571 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 2632 transitions. [2023-08-04 02:06:15,571 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 2632 transitions. [2023-08-04 02:06:15,572 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 02:06:15,572 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 2632 transitions. [2023-08-04 02:06:15,574 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 376.0) internal successors, (2632), 7 states have internal predecessors, (2632), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:06:15,576 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 947.0) internal successors, (7576), 8 states have internal predecessors, (7576), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:06:15,577 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 947.0) internal successors, (7576), 8 states have internal predecessors, (7576), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:06:15,577 INFO L175 Difference]: Start difference. First operand has 180 places, 147 transitions, 1392 flow. Second operand 7 states and 2632 transitions. [2023-08-04 02:06:15,577 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 157 places, 202 transitions, 2172 flow [2023-08-04 02:06:16,217 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 136 places, 202 transitions, 1886 flow, removed 127 selfloop flow, removed 21 redundant places. [2023-08-04 02:06:16,219 INFO L231 Difference]: Finished difference. Result has 139 places, 145 transitions, 1317 flow [2023-08-04 02:06:16,219 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=947, PETRI_DIFFERENCE_MINUEND_FLOW=1177, PETRI_DIFFERENCE_MINUEND_PLACES=130, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=147, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=98, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1317, PETRI_PLACES=139, PETRI_TRANSITIONS=145} [2023-08-04 02:06:16,219 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 83 predicate places. [2023-08-04 02:06:16,219 INFO L495 AbstractCegarLoop]: Abstraction has has 139 places, 145 transitions, 1317 flow [2023-08-04 02:06:16,220 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 365.57142857142856) internal successors, (2559), 7 states have internal predecessors, (2559), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:06:16,220 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 02:06:16,220 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 02:06:16,220 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2023-08-04 02:06:16,220 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 02:06:16,220 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 02:06:16,221 INFO L85 PathProgramCache]: Analyzing trace with hash -1214201176, now seen corresponding path program 1 times [2023-08-04 02:06:16,221 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 02:06:16,221 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [640492183] [2023-08-04 02:06:16,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 02:06:16,221 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 02:06:16,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 02:06:16,953 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 2 proven. 18 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2023-08-04 02:06:16,954 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 02:06:16,954 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [640492183] [2023-08-04 02:06:16,954 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [640492183] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 02:06:16,954 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [517593569] [2023-08-04 02:06:16,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 02:06:16,954 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 02:06:16,954 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 02:06:16,966 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 02:06:16,997 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2023-08-04 02:06:17,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 02:06:17,143 INFO L262 TraceCheckSpWp]: Trace formula consists of 235 conjuncts, 13 conjunts are in the unsatisfiable core [2023-08-04 02:06:17,145 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 02:06:22,872 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2023-08-04 02:06:22,872 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 02:06:26,196 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2023-08-04 02:06:26,196 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [517593569] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 02:06:26,196 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 02:06:26,196 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 6, 6] total 21 [2023-08-04 02:06:26,196 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [753395369] [2023-08-04 02:06:26,196 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 02:06:26,199 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-08-04 02:06:26,200 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 02:06:26,201 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-08-04 02:06:26,201 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=372, Unknown=0, NotChecked=0, Total=420 [2023-08-04 02:06:30,775 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 338 out of 947 [2023-08-04 02:06:30,777 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 139 places, 145 transitions, 1317 flow. Second operand has 21 states, 21 states have (on average 343.57142857142856) internal successors, (7215), 21 states have internal predecessors, (7215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:06:30,777 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 02:06:30,777 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 338 of 947 [2023-08-04 02:06:30,778 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 02:06:37,863 INFO L124 PetriNetUnfolderBase]: 7233/14105 cut-off events. [2023-08-04 02:06:37,863 INFO L125 PetriNetUnfolderBase]: For 140239/140239 co-relation queries the response was YES. [2023-08-04 02:06:37,970 INFO L83 FinitePrefix]: Finished finitePrefix Result has 77776 conditions, 14105 events. 7233/14105 cut-off events. For 140239/140239 co-relation queries the response was YES. Maximal size of possible extension queue 507. Compared 113261 event pairs, 1023 based on Foata normal form. 64/14168 useless extension candidates. Maximal degree in co-relation 77737. Up to 5867 conditions per place. [2023-08-04 02:06:37,982 INFO L140 encePairwiseOnDemand]: 927/947 looper letters, 0 selfloop transitions, 0 changer transitions 257/257 dead transitions. [2023-08-04 02:06:37,982 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 159 places, 257 transitions, 2780 flow [2023-08-04 02:06:37,982 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-08-04 02:06:37,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2023-08-04 02:06:37,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 8291 transitions. [2023-08-04 02:06:37,987 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36479232664554734 [2023-08-04 02:06:37,987 INFO L72 ComplementDD]: Start complementDD. Operand 24 states and 8291 transitions. [2023-08-04 02:06:37,987 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 8291 transitions. [2023-08-04 02:06:37,989 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 02:06:37,989 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 24 states and 8291 transitions. [2023-08-04 02:06:37,994 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 25 states, 24 states have (on average 345.4583333333333) internal successors, (8291), 24 states have internal predecessors, (8291), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:06:38,009 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 25 states, 25 states have (on average 947.0) internal successors, (23675), 25 states have internal predecessors, (23675), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:06:38,012 INFO L81 ComplementDD]: Finished complementDD. Result has 25 states, 25 states have (on average 947.0) internal successors, (23675), 25 states have internal predecessors, (23675), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:06:38,012 INFO L175 Difference]: Start difference. First operand has 139 places, 145 transitions, 1317 flow. Second operand 24 states and 8291 transitions. [2023-08-04 02:06:38,012 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 159 places, 257 transitions, 2780 flow [2023-08-04 02:06:38,313 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 150 places, 257 transitions, 2538 flow, removed 43 selfloop flow, removed 9 redundant places. [2023-08-04 02:06:38,314 INFO L231 Difference]: Finished difference. Result has 150 places, 0 transitions, 0 flow [2023-08-04 02:06:38,314 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=947, PETRI_DIFFERENCE_MINUEND_FLOW=1159, PETRI_DIFFERENCE_MINUEND_PLACES=127, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=143, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=143, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=0, PETRI_PLACES=150, PETRI_TRANSITIONS=0} [2023-08-04 02:06:38,315 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 94 predicate places. [2023-08-04 02:06:38,315 INFO L495 AbstractCegarLoop]: Abstraction has has 150 places, 0 transitions, 0 flow [2023-08-04 02:06:38,315 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 343.57142857142856) internal successors, (7215), 21 states have internal predecessors, (7215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:06:38,316 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2023-08-04 02:06:38,321 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2023-08-04 02:06:38,520 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2023-08-04 02:06:38,521 INFO L445 BasicCegarLoop]: Path program histogram: [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 02:06:38,521 INFO L307 ceAbstractionStarter]: Result for error location AllErrorsAtOnce was SAFE (2/2) [2023-08-04 02:06:38,521 INFO L228 ceAbstractionStarter]: Analysis of concurrent program completed with 2 thread instances [2023-08-04 02:06:38,521 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2023-08-04 02:06:38,524 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 04.08 02:06:38 BasicIcfg [2023-08-04 02:06:38,524 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-08-04 02:06:38,525 INFO L158 Benchmark]: Toolchain (without parser) took 219131.07ms. Allocated memory was 375.4MB in the beginning and 4.9GB in the end (delta: 4.5GB). Free memory was 329.7MB in the beginning and 3.1GB in the end (delta: -2.8GB). Peak memory consumption was 1.8GB. Max. memory is 16.0GB. [2023-08-04 02:06:38,525 INFO L158 Benchmark]: CDTParser took 0.09ms. Allocated memory is still 375.4MB. Free memory is still 331.8MB. There was no memory consumed. Max. memory is 16.0GB. [2023-08-04 02:06:38,525 INFO L158 Benchmark]: CACSL2BoogieTranslator took 228.38ms. Allocated memory is still 375.4MB. Free memory was 329.7MB in the beginning and 317.6MB in the end (delta: 12.1MB). Peak memory consumption was 12.6MB. Max. memory is 16.0GB. [2023-08-04 02:06:38,525 INFO L158 Benchmark]: Boogie Procedure Inliner took 32.54ms. Allocated memory is still 375.4MB. Free memory was 317.6MB in the beginning and 315.2MB in the end (delta: 2.4MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. [2023-08-04 02:06:38,525 INFO L158 Benchmark]: Boogie Preprocessor took 24.34ms. Allocated memory is still 375.4MB. Free memory was 315.2MB in the beginning and 313.4MB in the end (delta: 1.8MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. [2023-08-04 02:06:38,525 INFO L158 Benchmark]: RCFGBuilder took 552.84ms. Allocated memory is still 375.4MB. Free memory was 313.4MB in the beginning and 291.4MB in the end (delta: 22.0MB). Peak memory consumption was 23.1MB. Max. memory is 16.0GB. [2023-08-04 02:06:38,526 INFO L158 Benchmark]: TraceAbstraction took 218284.82ms. Allocated memory was 375.4MB in the beginning and 4.9GB in the end (delta: 4.5GB). Free memory was 290.7MB in the beginning and 3.1GB in the end (delta: -2.8GB). Peak memory consumption was 1.7GB. Max. memory is 16.0GB. [2023-08-04 02:06:38,527 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.09ms. Allocated memory is still 375.4MB. Free memory is still 331.8MB. There was no memory consumed. Max. memory is 16.0GB. * CACSL2BoogieTranslator took 228.38ms. Allocated memory is still 375.4MB. Free memory was 329.7MB in the beginning and 317.6MB in the end (delta: 12.1MB). Peak memory consumption was 12.6MB. Max. memory is 16.0GB. * Boogie Procedure Inliner took 32.54ms. Allocated memory is still 375.4MB. Free memory was 317.6MB in the beginning and 315.2MB in the end (delta: 2.4MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. * Boogie Preprocessor took 24.34ms. Allocated memory is still 375.4MB. Free memory was 315.2MB in the beginning and 313.4MB in the end (delta: 1.8MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. * RCFGBuilder took 552.84ms. Allocated memory is still 375.4MB. Free memory was 313.4MB in the beginning and 291.4MB in the end (delta: 22.0MB). Peak memory consumption was 23.1MB. Max. memory is 16.0GB. * TraceAbstraction took 218284.82ms. Allocated memory was 375.4MB in the beginning and 4.9GB in the end (delta: 4.5GB). Free memory was 290.7MB in the beginning and 3.1GB in the end (delta: -2.8GB). Peak memory consumption was 1.7GB. Max. memory is 16.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 7.0s, 260 PlacesBefore, 41 PlacesAfterwards, 288 TransitionsBefore, 44 TransitionsAfterwards, 33528 CoEnabledTransitionPairs, 8 FixpointIterations, 54 TrivialSequentialCompositions, 161 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 83 ConcurrentYvCompositions, 25 ChoiceCompositions, 323 TotalNumberOfCompositions, 37799 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 36109, independent: 36054, independent conditional: 0, independent unconditional: 36054, dependent: 55, dependent conditional: 0, dependent unconditional: 55, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: SyntacticIndependenceRelation.Independence Queries: [ total: 19633, independent: 19603, independent conditional: 0, independent unconditional: 19603, dependent: 30, dependent conditional: 0, dependent unconditional: 30, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Cache Queries: [ total: 36109, independent: 16451, independent conditional: 0, independent unconditional: 16451, dependent: 25, dependent conditional: 0, dependent unconditional: 25, unknown: 19633, unknown conditional: 0, unknown unconditional: 19633] , Statistics on independence cache: Total cache size (in pairs): 71, Positive cache size: 68, Positive conditional cache size: 0, Positive unconditional cache size: 68, Negative cache size: 3, Negative conditional cache size: 0, Negative unconditional cache size: 3, Unknown cache size: 0, Unknown conditional cache size: 0, Unknown unconditional cache size: 0 - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 10.3s, 383 PlacesBefore, 56 PlacesAfterwards, 432 TransitionsBefore, 62 TransitionsAfterwards, 107448 CoEnabledTransitionPairs, 8 FixpointIterations, 54 TrivialSequentialCompositions, 276 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 135 ConcurrentYvCompositions, 43 ChoiceCompositions, 508 TotalNumberOfCompositions, 131244 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 125540, independent: 125454, independent conditional: 0, independent unconditional: 125454, dependent: 86, dependent conditional: 0, dependent unconditional: 86, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: SyntacticIndependenceRelation.Independence Queries: [ total: 62734, independent: 62685, independent conditional: 0, independent unconditional: 62685, dependent: 49, dependent conditional: 0, dependent unconditional: 49, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Cache Queries: [ total: 125540, independent: 62769, independent conditional: 0, independent unconditional: 62769, dependent: 37, dependent conditional: 0, dependent unconditional: 37, unknown: 62734, unknown conditional: 0, unknown unconditional: 62734] , Statistics on independence cache: Total cache size (in pairs): 202, Positive cache size: 197, Positive conditional cache size: 0, Positive unconditional cache size: 197, Negative cache size: 5, Negative conditional cache size: 0, Negative unconditional cache size: 5, Unknown cache size: 0, Unknown conditional cache size: 0, Unknown unconditional cache size: 0 - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 10.0s, 383 PlacesBefore, 56 PlacesAfterwards, 432 TransitionsBefore, 62 TransitionsAfterwards, 107448 CoEnabledTransitionPairs, 8 FixpointIterations, 54 TrivialSequentialCompositions, 275 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 143 ConcurrentYvCompositions, 43 ChoiceCompositions, 515 TotalNumberOfCompositions, 132151 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 126412, independent: 126323, independent conditional: 0, independent unconditional: 126323, dependent: 89, dependent conditional: 0, dependent unconditional: 89, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: SyntacticIndependenceRelation.Independence Queries: [ total: 63146, independent: 63092, independent conditional: 0, independent unconditional: 63092, dependent: 54, dependent conditional: 0, dependent unconditional: 54, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Cache Queries: [ total: 126412, independent: 63231, independent conditional: 0, independent unconditional: 63231, dependent: 35, dependent conditional: 0, dependent unconditional: 35, unknown: 63146, unknown conditional: 0, unknown unconditional: 63146] , Statistics on independence cache: Total cache size (in pairs): 167, Positive cache size: 161, Positive conditional cache size: 0, Positive unconditional cache size: 161, Negative cache size: 6, Negative conditional cache size: 0, Negative unconditional cache size: 6, Unknown cache size: 0, Unknown conditional cache size: 0, Unknown unconditional cache size: 0 - PositiveResult [Line: 84]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data for thread instance sufficiency with 1 thread instances CFG has 7 procedures, 371 locations, 4 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 0.0s, RemoveRedundantFlowTime: 0.0s, RemoveRedundantFlowUnfoldingTime: 0.0s, BackfoldingTime: 0.0s, BackfoldingUnfoldingTime: 0.0s, FlowIncreaseByBackfolding: 0, BasicCegarLoop: OverallTime: 7.4s, OverallIterations: 1, TraceHistogramMax: 2, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 0.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 7.3s, HoareTripleCheckerStatistics: , PredicateUnifierStatistics: No data available, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=130occurred in iteration=0, InterpolantAutomatonStates: 0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.0s InterpolantComputationTime, 6 NumberOfCodeBlocks, 6 NumberOfCodeBlocksAsserted, 1 NumberOfCheckSat, 0 ConstructedInterpolants, 0 QuantifiedInterpolants, 0 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 0 InterpolantComputations, 0 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - StatisticsResult: Ultimate Automizer benchmark data for thread instance sufficiency with 2 thread instances CFG has 10 procedures, 488 locations, 4 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 0.0s, RemoveRedundantFlowTime: 0.0s, RemoveRedundantFlowUnfoldingTime: 0.0s, BackfoldingTime: 0.0s, BackfoldingUnfoldingTime: 0.0s, FlowIncreaseByBackfolding: 0, BasicCegarLoop: OverallTime: 21.5s, OverallIterations: 7, TraceHistogramMax: 3, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 8.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 11.5s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 205 SdHoareTripleChecker+Valid, 0.4s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 162 mSDsluCounter, 3 SdHoareTripleChecker+Invalid, 0.3s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 0 mSDsCounter, 21 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 486 IncrementalHoareTripleChecker+Invalid, 507 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 21 mSolverCounterUnsat, 3 mSDtfsCounter, 486 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 151 GetRequests, 128 SyntacticMatches, 4 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=214occurred in iteration=0, InterpolantAutomatonStates: 29, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.5s InterpolantComputationTime, 224 NumberOfCodeBlocks, 224 NumberOfCodeBlocksAsserted, 11 NumberOfCheckSat, 252 ConstructedInterpolants, 0 QuantifiedInterpolants, 406 SizeOfPredicates, 0 NumberOfNonLiveVariables, 590 ConjunctsInSsa, 14 ConjunctsInUnsatCore, 13 InterpolantComputations, 5 PerfectInterpolantSequences, 154/170 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 10 procedures, 488 locations, 4 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 0.0s, RemoveRedundantFlowTime: 0.0s, RemoveRedundantFlowUnfoldingTime: 0.0s, BackfoldingTime: 0.0s, BackfoldingUnfoldingTime: 0.0s, FlowIncreaseByBackfolding: 0, BasicCegarLoop: OverallTime: 189.1s, OverallIterations: 18, TraceHistogramMax: 2, PathProgramHistogramMax: 3, EmptinessCheckTime: 0.0s, AutomataDifference: 117.7s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 10.9s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 10009 SdHoareTripleChecker+Valid, 22.1s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 8827 mSDsluCounter, 34587 SdHoareTripleChecker+Invalid, 19.5s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 34290 mSDsCounter, 247 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 29030 IncrementalHoareTripleChecker+Invalid, 29277 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 247 mSolverCounterUnsat, 297 mSDtfsCounter, 29030 mSolverCounterSat, 0.2s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 1517 GetRequests, 1229 SyntacticMatches, 76 SemanticMatches, 212 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1741 ImplicationChecksByTransitivity, 22.6s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=1392occurred in iteration=16, InterpolantAutomatonStates: 163, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.3s SsaConstructionTime, 1.1s SatisfiabilityAnalysisTime, 54.3s InterpolantComputationTime, 1475 NumberOfCodeBlocks, 1475 NumberOfCodeBlocksAsserted, 36 NumberOfCheckSat, 2024 ConstructedInterpolants, 0 QuantifiedInterpolants, 64720 SizeOfPredicates, 362 NumberOfNonLiveVariables, 3046 ConjunctsInSsa, 99 ConjunctsInUnsatCore, 45 InterpolantComputations, 7 PerfectInterpolantSequences, 785/882 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2023-08-04 02:06:38,559 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...