/usr/bin/java -Xmx16000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s /storage/repos/CAV22/benchmarks/svcomp-Reach-32bit-Automizer_Default.epf --traceabstraction.order.of.the.error.locations.to.be.checked PROGRAM_FIRST -tc /storage/repos/CAV22/benchmarks/AutomizerCInline.xml -i /storage/repos/CAV22/benchmarks/increased_bounds/weaver_chl-match-subst.wvr_bound2.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-19404b3-m [2023-08-04 08:22:59,718 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-08-04 08:22:59,763 INFO L114 SettingsManager]: Loading settings from /storage/repos/CAV22/benchmarks/svcomp-Reach-32bit-Automizer_Default.epf [2023-08-04 08:22:59,767 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-08-04 08:22:59,767 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-08-04 08:22:59,768 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Translation Mode: [2023-08-04 08:22:59,768 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Checked method. Library mode if empty. [2023-08-04 08:22:59,786 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-04 08:22:59,786 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-04 08:22:59,786 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-04 08:22:59,787 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-04 08:22:59,787 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-04 08:22:59,788 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-04 08:22:59,788 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-08-04 08:22:59,788 INFO L153 SettingsManager]: * Use SBE=true [2023-08-04 08:22:59,789 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-04 08:22:59,790 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-04 08:22:59,792 INFO L153 SettingsManager]: * sizeof long=4 [2023-08-04 08:22:59,792 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-04 08:22:59,793 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-08-04 08:22:59,793 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-08-04 08:22:59,797 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-04 08:22:59,797 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-04 08:22:59,797 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-04 08:22:59,797 INFO L153 SettingsManager]: * sizeof long double=12 [2023-08-04 08:22:59,798 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-08-04 08:22:59,798 INFO L153 SettingsManager]: * Use constant arrays=true [2023-08-04 08:22:59,798 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-04 08:22:59,798 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-04 08:22:59,798 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-04 08:22:59,799 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-04 08:22:59,799 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-04 08:22:59,799 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-04 08:22:59,799 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-04 08:22:59,799 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-04 08:22:59,800 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-04 08:22:59,800 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-04 08:22:59,800 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-08-04 08:22:59,800 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-04 08:22:59,803 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-04 08:22:59,803 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-04 08:22:59,803 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Order of the error locations to be checked -> PROGRAM_FIRST [2023-08-04 08:23:00,029 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-04 08:23:00,052 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-04 08:23:00,055 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-04 08:23:00,056 INFO L270 PluginConnector]: Initializing CDTParser... [2023-08-04 08:23:00,056 INFO L274 PluginConnector]: CDTParser initialized [2023-08-04 08:23:00,057 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/CAV22/benchmarks/increased_bounds/weaver_chl-match-subst.wvr_bound2.c [2023-08-04 08:23:01,160 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-08-04 08:23:01,332 INFO L384 CDTParser]: Found 1 translation units. [2023-08-04 08:23:01,333 INFO L180 CDTParser]: Scanning /storage/repos/CAV22/benchmarks/increased_bounds/weaver_chl-match-subst.wvr_bound2.c [2023-08-04 08:23:01,339 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/749c98862/5a6802112c3b4fce92609e543bebb918/FLAGdaaecd170 [2023-08-04 08:23:01,352 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/749c98862/5a6802112c3b4fce92609e543bebb918 [2023-08-04 08:23:01,355 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-04 08:23:01,356 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-08-04 08:23:01,357 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-04 08:23:01,357 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-04 08:23:01,362 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-04 08:23:01,363 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.08 08:23:01" (1/1) ... [2023-08-04 08:23:01,364 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4afa6d46 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 08:23:01, skipping insertion in model container [2023-08-04 08:23:01,364 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.08 08:23:01" (1/1) ... [2023-08-04 08:23:01,382 INFO L176 MainTranslator]: Built tables and reachable declarations [2023-08-04 08:23:01,508 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-match-subst.wvr_bound2.c[3260,3273] [2023-08-04 08:23:01,511 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-04 08:23:01,518 INFO L201 MainTranslator]: Completed pre-run [2023-08-04 08:23:01,544 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-match-subst.wvr_bound2.c[3260,3273] [2023-08-04 08:23:01,547 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-04 08:23:01,566 INFO L206 MainTranslator]: Completed translation [2023-08-04 08:23:01,566 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 08:23:01 WrapperNode [2023-08-04 08:23:01,566 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-04 08:23:01,567 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-04 08:23:01,567 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-04 08:23:01,567 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-04 08:23:01,573 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 08:23:01" (1/1) ... [2023-08-04 08:23:01,580 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 08:23:01" (1/1) ... [2023-08-04 08:23:01,603 INFO L138 Inliner]: procedures = 23, calls = 34, calls flagged for inlining = 12, calls inlined = 22, statements flattened = 263 [2023-08-04 08:23:01,604 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-04 08:23:01,605 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-04 08:23:01,605 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-04 08:23:01,605 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-08-04 08:23:01,612 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 08:23:01" (1/1) ... [2023-08-04 08:23:01,613 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 08:23:01" (1/1) ... [2023-08-04 08:23:01,616 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 08:23:01" (1/1) ... [2023-08-04 08:23:01,616 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 08:23:01" (1/1) ... [2023-08-04 08:23:01,634 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 08:23:01" (1/1) ... [2023-08-04 08:23:01,638 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 08:23:01" (1/1) ... [2023-08-04 08:23:01,640 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 08:23:01" (1/1) ... [2023-08-04 08:23:01,641 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 08:23:01" (1/1) ... [2023-08-04 08:23:01,644 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-04 08:23:01,645 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-04 08:23:01,645 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-08-04 08:23:01,645 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-08-04 08:23:01,646 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 08:23:01" (1/1) ... [2023-08-04 08:23:01,651 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-04 08:23:01,662 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 08:23:01,674 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-08-04 08:23:01,701 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-08-04 08:23:01,723 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-04 08:23:01,723 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-08-04 08:23:01,723 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-08-04 08:23:01,724 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-08-04 08:23:01,724 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-08-04 08:23:01,724 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2023-08-04 08:23:01,725 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2023-08-04 08:23:01,725 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-04 08:23:01,725 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-04 08:23:01,725 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-04 08:23:01,725 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-04 08:23:01,726 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-04 08:23:01,727 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-04 08:23:01,727 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-04 08:23:01,729 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-08-04 08:23:01,869 INFO L236 CfgBuilder]: Building ICFG [2023-08-04 08:23:01,872 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-04 08:23:02,230 INFO L277 CfgBuilder]: Performing block encoding [2023-08-04 08:23:02,241 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-04 08:23:02,241 INFO L302 CfgBuilder]: Removed 6 assume(true) statements. [2023-08-04 08:23:02,243 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.08 08:23:02 BoogieIcfgContainer [2023-08-04 08:23:02,244 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-04 08:23:02,246 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-04 08:23:02,246 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-08-04 08:23:02,249 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-08-04 08:23:02,249 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 04.08 08:23:01" (1/3) ... [2023-08-04 08:23:02,250 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4dd61034 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.08 08:23:02, skipping insertion in model container [2023-08-04 08:23:02,250 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 08:23:01" (2/3) ... [2023-08-04 08:23:02,250 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4dd61034 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.08 08:23:02, skipping insertion in model container [2023-08-04 08:23:02,250 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.08 08:23:02" (3/3) ... [2023-08-04 08:23:02,251 INFO L112 eAbstractionObserver]: Analyzing ICFG weaver_chl-match-subst.wvr_bound2.c [2023-08-04 08:23:02,257 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-08-04 08:23:02,264 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-04 08:23:02,264 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-08-04 08:23:02,264 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-04 08:23:02,389 INFO L144 ThreadInstanceAdder]: Constructed 9 joinOtherThreadTransitions. [2023-08-04 08:23:02,435 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 281 places, 303 transitions, 648 flow [2023-08-04 08:23:02,717 INFO L124 PetriNetUnfolderBase]: 118/961 cut-off events. [2023-08-04 08:23:02,718 INFO L125 PetriNetUnfolderBase]: For 36/72 co-relation queries the response was YES. [2023-08-04 08:23:02,740 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1022 conditions, 961 events. 118/961 cut-off events. For 36/72 co-relation queries the response was YES. Maximal size of possible extension queue 24. Compared 5605 event pairs, 0 based on Foata normal form. 0/818 useless extension candidates. Maximal degree in co-relation 493. Up to 16 conditions per place. [2023-08-04 08:23:02,740 INFO L82 GeneralOperation]: Start removeDead. Operand has 281 places, 303 transitions, 648 flow [2023-08-04 08:23:02,757 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 281 places, 303 transitions, 648 flow [2023-08-04 08:23:02,760 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-04 08:23:02,773 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 281 places, 303 transitions, 648 flow [2023-08-04 08:23:02,779 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 281 places, 303 transitions, 648 flow [2023-08-04 08:23:02,780 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 281 places, 303 transitions, 648 flow [2023-08-04 08:23:02,933 INFO L124 PetriNetUnfolderBase]: 118/961 cut-off events. [2023-08-04 08:23:02,933 INFO L125 PetriNetUnfolderBase]: For 36/72 co-relation queries the response was YES. [2023-08-04 08:23:02,945 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1022 conditions, 961 events. 118/961 cut-off events. For 36/72 co-relation queries the response was YES. Maximal size of possible extension queue 24. Compared 5605 event pairs, 0 based on Foata normal form. 0/818 useless extension candidates. Maximal degree in co-relation 493. Up to 16 conditions per place. [2023-08-04 08:23:02,987 INFO L119 LiptonReduction]: Number of co-enabled transitions 36660 [2023-08-04 08:23:10,950 INFO L134 LiptonReduction]: Checked pairs total: 38222 [2023-08-04 08:23:10,951 INFO L136 LiptonReduction]: Total number of compositions: 325 [2023-08-04 08:23:10,962 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-04 08:23:10,967 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;@67e45a27, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-04 08:23:10,967 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-04 08:23:10,973 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-04 08:23:10,973 INFO L124 PetriNetUnfolderBase]: 1/39 cut-off events. [2023-08-04 08:23:10,973 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 08:23:10,973 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 08:23:10,974 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 08:23:10,974 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 08:23:10,978 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 08:23:10,978 INFO L85 PathProgramCache]: Analyzing trace with hash -1432507849, now seen corresponding path program 1 times [2023-08-04 08:23:10,986 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 08:23:10,986 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1613723782] [2023-08-04 08:23:10,986 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:23:10,987 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 08:23:11,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:23:11,167 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-04 08:23:11,168 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 08:23:11,168 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1613723782] [2023-08-04 08:23:11,168 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1613723782] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 08:23:11,169 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 08:23:11,169 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-04 08:23:11,170 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [168395281] [2023-08-04 08:23:11,170 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 08:23:11,181 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 08:23:11,187 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 08:23:11,210 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 08:23:11,210 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-04 08:23:11,231 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 266 out of 628 [2023-08-04 08:23:11,269 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 44 transitions, 130 flow. Second operand has 3 states, 3 states have (on average 268.6666666666667) internal successors, (806), 3 states have internal predecessors, (806), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:23:11,269 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 08:23:11,269 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 266 of 628 [2023-08-04 08:23:11,270 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 08:23:11,458 INFO L124 PetriNetUnfolderBase]: 426/873 cut-off events. [2023-08-04 08:23:11,459 INFO L125 PetriNetUnfolderBase]: For 81/81 co-relation queries the response was YES. [2023-08-04 08:23:11,463 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1793 conditions, 873 events. 426/873 cut-off events. For 81/81 co-relation queries the response was YES. Maximal size of possible extension queue 51. Compared 4489 event pairs, 224 based on Foata normal form. 0/766 useless extension candidates. Maximal degree in co-relation 1272. Up to 795 conditions per place. [2023-08-04 08:23:11,469 INFO L140 encePairwiseOnDemand]: 623/628 looper letters, 35 selfloop transitions, 2 changer transitions 4/44 dead transitions. [2023-08-04 08:23:11,470 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 42 places, 44 transitions, 206 flow [2023-08-04 08:23:11,472 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 08:23:11,474 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 08:23:11,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 839 transitions. [2023-08-04 08:23:11,493 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4453290870488323 [2023-08-04 08:23:11,493 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 839 transitions. [2023-08-04 08:23:11,494 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 839 transitions. [2023-08-04 08:23:11,498 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 08:23:11,500 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 839 transitions. [2023-08-04 08:23:11,506 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 279.6666666666667) internal successors, (839), 3 states have internal predecessors, (839), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:23:11,515 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 628.0) internal successors, (2512), 4 states have internal predecessors, (2512), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:23:11,517 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 628.0) internal successors, (2512), 4 states have internal predecessors, (2512), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:23:11,518 INFO L175 Difference]: Start difference. First operand has 41 places, 44 transitions, 130 flow. Second operand 3 states and 839 transitions. [2023-08-04 08:23:11,518 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 42 places, 44 transitions, 206 flow [2023-08-04 08:23:11,522 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 44 transitions, 206 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-04 08:23:11,524 INFO L231 Difference]: Finished difference. Result has 43 places, 39 transitions, 122 flow [2023-08-04 08:23:11,526 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=628, PETRI_DIFFERENCE_MINUEND_FLOW=126, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=122, PETRI_PLACES=43, PETRI_TRANSITIONS=39} [2023-08-04 08:23:11,529 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 2 predicate places. [2023-08-04 08:23:11,530 INFO L495 AbstractCegarLoop]: Abstraction has has 43 places, 39 transitions, 122 flow [2023-08-04 08:23:11,530 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 268.6666666666667) internal successors, (806), 3 states have internal predecessors, (806), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:23:11,531 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 08:23:11,531 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 08:23:11,531 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-04 08:23:11,531 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 08:23:11,539 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 08:23:11,540 INFO L85 PathProgramCache]: Analyzing trace with hash -575237444, now seen corresponding path program 1 times [2023-08-04 08:23:11,540 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 08:23:11,540 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [121668511] [2023-08-04 08:23:11,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:23:11,541 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 08:23:11,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:23:11,635 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-04 08:23:11,635 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 08:23:11,635 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [121668511] [2023-08-04 08:23:11,636 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [121668511] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 08:23:11,636 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [333152651] [2023-08-04 08:23:11,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:23:11,636 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 08:23:11,636 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 08:23:11,639 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 08:23:11,670 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-08-04 08:23:11,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:23:11,736 INFO L262 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 08:23:11,740 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 08:23:11,752 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-04 08:23:11,752 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 08:23:11,753 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [333152651] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 08:23:11,753 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 08:23:11,753 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2023-08-04 08:23:11,753 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [54467110] [2023-08-04 08:23:11,754 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 08:23:11,754 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 08:23:11,754 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 08:23:11,755 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 08:23:11,755 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 08:23:11,766 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 266 out of 628 [2023-08-04 08:23:11,767 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 39 transitions, 122 flow. Second operand has 3 states, 3 states have (on average 270.0) internal successors, (810), 3 states have internal predecessors, (810), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:23:11,767 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 08:23:11,767 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 266 of 628 [2023-08-04 08:23:11,767 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 08:23:11,901 INFO L124 PetriNetUnfolderBase]: 408/821 cut-off events. [2023-08-04 08:23:11,901 INFO L125 PetriNetUnfolderBase]: For 83/83 co-relation queries the response was YES. [2023-08-04 08:23:11,902 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1694 conditions, 821 events. 408/821 cut-off events. For 83/83 co-relation queries the response was YES. Maximal size of possible extension queue 49. Compared 3907 event pairs, 225 based on Foata normal form. 0/724 useless extension candidates. Maximal degree in co-relation 1668. Up to 753 conditions per place. [2023-08-04 08:23:11,906 INFO L140 encePairwiseOnDemand]: 625/628 looper letters, 36 selfloop transitions, 2 changer transitions 1/42 dead transitions. [2023-08-04 08:23:11,906 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 42 places, 42 transitions, 206 flow [2023-08-04 08:23:11,906 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 08:23:11,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 08:23:11,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 838 transitions. [2023-08-04 08:23:11,909 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4447983014861996 [2023-08-04 08:23:11,909 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 838 transitions. [2023-08-04 08:23:11,909 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 838 transitions. [2023-08-04 08:23:11,910 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 08:23:11,910 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 838 transitions. [2023-08-04 08:23:11,912 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 279.3333333333333) internal successors, (838), 3 states have internal predecessors, (838), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:23:11,916 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 628.0) internal successors, (2512), 4 states have internal predecessors, (2512), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:23:11,917 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 628.0) internal successors, (2512), 4 states have internal predecessors, (2512), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:23:11,917 INFO L175 Difference]: Start difference. First operand has 43 places, 39 transitions, 122 flow. Second operand 3 states and 838 transitions. [2023-08-04 08:23:11,917 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 42 places, 42 transitions, 206 flow [2023-08-04 08:23:11,919 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 37 places, 42 transitions, 190 flow, removed 0 selfloop flow, removed 5 redundant places. [2023-08-04 08:23:11,919 INFO L231 Difference]: Finished difference. Result has 38 places, 39 transitions, 114 flow [2023-08-04 08:23:11,920 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=628, PETRI_DIFFERENCE_MINUEND_FLOW=106, PETRI_DIFFERENCE_MINUEND_PLACES=35, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=114, PETRI_PLACES=38, PETRI_TRANSITIONS=39} [2023-08-04 08:23:11,920 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, -3 predicate places. [2023-08-04 08:23:11,921 INFO L495 AbstractCegarLoop]: Abstraction has has 38 places, 39 transitions, 114 flow [2023-08-04 08:23:11,921 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 270.0) internal successors, (810), 3 states have internal predecessors, (810), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:23:11,921 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 08:23:11,921 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 08:23:11,930 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 08:23:12,127 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 08:23:12,127 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 08:23:12,128 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 08:23:12,128 INFO L85 PathProgramCache]: Analyzing trace with hash 1988033634, now seen corresponding path program 1 times [2023-08-04 08:23:12,128 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 08:23:12,128 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1376397281] [2023-08-04 08:23:12,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:23:12,129 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 08:23:12,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:23:12,257 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-04 08:23:12,257 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 08:23:12,257 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1376397281] [2023-08-04 08:23:12,257 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1376397281] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 08:23:12,257 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [819121611] [2023-08-04 08:23:12,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:23:12,258 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 08:23:12,258 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 08:23:12,261 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 08:23:12,290 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-08-04 08:23:12,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:23:12,348 INFO L262 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 08:23:12,350 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 08:23:12,358 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-04 08:23:12,358 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 08:23:12,359 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [819121611] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 08:23:12,359 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 08:23:12,359 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2023-08-04 08:23:12,359 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [191232765] [2023-08-04 08:23:12,359 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 08:23:12,359 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 08:23:12,360 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 08:23:12,360 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 08:23:12,361 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 08:23:12,375 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 266 out of 628 [2023-08-04 08:23:12,377 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 38 places, 39 transitions, 114 flow. Second operand has 3 states, 3 states have (on average 271.0) internal successors, (813), 3 states have internal predecessors, (813), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:23:12,377 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 08:23:12,377 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 266 of 628 [2023-08-04 08:23:12,377 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 08:23:12,514 INFO L124 PetriNetUnfolderBase]: 404/817 cut-off events. [2023-08-04 08:23:12,514 INFO L125 PetriNetUnfolderBase]: For 9/9 co-relation queries the response was YES. [2023-08-04 08:23:12,515 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1691 conditions, 817 events. 404/817 cut-off events. For 9/9 co-relation queries the response was YES. Maximal size of possible extension queue 45. Compared 3635 event pairs, 230 based on Foata normal form. 0/728 useless extension candidates. Maximal degree in co-relation 958. Up to 729 conditions per place. [2023-08-04 08:23:12,518 INFO L140 encePairwiseOnDemand]: 625/628 looper letters, 37 selfloop transitions, 2 changer transitions 1/43 dead transitions. [2023-08-04 08:23:12,518 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 40 places, 43 transitions, 202 flow [2023-08-04 08:23:12,519 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 08:23:12,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 08:23:12,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 839 transitions. [2023-08-04 08:23:12,522 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4453290870488323 [2023-08-04 08:23:12,522 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 839 transitions. [2023-08-04 08:23:12,522 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 839 transitions. [2023-08-04 08:23:12,523 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 08:23:12,523 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 839 transitions. [2023-08-04 08:23:12,525 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 279.6666666666667) internal successors, (839), 3 states have internal predecessors, (839), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:23:12,528 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 628.0) internal successors, (2512), 4 states have internal predecessors, (2512), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:23:12,529 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 628.0) internal successors, (2512), 4 states have internal predecessors, (2512), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:23:12,529 INFO L175 Difference]: Start difference. First operand has 38 places, 39 transitions, 114 flow. Second operand 3 states and 839 transitions. [2023-08-04 08:23:12,529 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 40 places, 43 transitions, 202 flow [2023-08-04 08:23:12,531 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 38 places, 43 transitions, 198 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-04 08:23:12,532 INFO L231 Difference]: Finished difference. Result has 39 places, 39 transitions, 118 flow [2023-08-04 08:23:12,532 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=628, PETRI_DIFFERENCE_MINUEND_FLOW=110, PETRI_DIFFERENCE_MINUEND_PLACES=36, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=118, PETRI_PLACES=39, PETRI_TRANSITIONS=39} [2023-08-04 08:23:12,534 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, -2 predicate places. [2023-08-04 08:23:12,534 INFO L495 AbstractCegarLoop]: Abstraction has has 39 places, 39 transitions, 118 flow [2023-08-04 08:23:12,534 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 271.0) internal successors, (813), 3 states have internal predecessors, (813), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:23:12,535 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 08:23:12,535 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 08:23:12,544 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-08-04 08:23:12,740 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2023-08-04 08:23:12,740 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 08:23:12,741 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 08:23:12,741 INFO L85 PathProgramCache]: Analyzing trace with hash 408334470, now seen corresponding path program 1 times [2023-08-04 08:23:12,741 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 08:23:12,741 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [496869948] [2023-08-04 08:23:12,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:23:12,741 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 08:23:12,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:23:12,810 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-04 08:23:12,811 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 08:23:12,811 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [496869948] [2023-08-04 08:23:12,811 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [496869948] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 08:23:12,811 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [726367325] [2023-08-04 08:23:12,811 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:23:12,812 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 08:23:12,812 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 08:23:12,813 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 08:23:12,820 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-08-04 08:23:12,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:23:12,891 INFO L262 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 08:23:12,892 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 08:23:12,899 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-04 08:23:12,899 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 08:23:12,900 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [726367325] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 08:23:12,900 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 08:23:12,900 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2023-08-04 08:23:12,900 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [972949194] [2023-08-04 08:23:12,900 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 08:23:12,900 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 08:23:12,901 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 08:23:12,901 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 08:23:12,901 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 08:23:12,910 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 266 out of 628 [2023-08-04 08:23:12,911 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 39 places, 39 transitions, 118 flow. Second operand has 3 states, 3 states have (on average 272.0) internal successors, (816), 3 states have internal predecessors, (816), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:23:12,912 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 08:23:12,912 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 266 of 628 [2023-08-04 08:23:12,912 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 08:23:13,056 INFO L124 PetriNetUnfolderBase]: 272/581 cut-off events. [2023-08-04 08:23:13,056 INFO L125 PetriNetUnfolderBase]: For 11/11 co-relation queries the response was YES. [2023-08-04 08:23:13,057 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1242 conditions, 581 events. 272/581 cut-off events. For 11/11 co-relation queries the response was YES. Maximal size of possible extension queue 33. Compared 2368 event pairs, 199 based on Foata normal form. 0/524 useless extension candidates. Maximal degree in co-relation 738. Up to 485 conditions per place. [2023-08-04 08:23:13,059 INFO L140 encePairwiseOnDemand]: 625/628 looper letters, 42 selfloop transitions, 2 changer transitions 0/47 dead transitions. [2023-08-04 08:23:13,060 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 41 places, 47 transitions, 228 flow [2023-08-04 08:23:13,060 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 08:23:13,060 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 08:23:13,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 843 transitions. [2023-08-04 08:23:13,063 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44745222929936307 [2023-08-04 08:23:13,063 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 843 transitions. [2023-08-04 08:23:13,063 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 843 transitions. [2023-08-04 08:23:13,064 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 08:23:13,064 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 843 transitions. [2023-08-04 08:23:13,066 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 281.0) internal successors, (843), 3 states have internal predecessors, (843), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:23:13,069 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 628.0) internal successors, (2512), 4 states have internal predecessors, (2512), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:23:13,070 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 628.0) internal successors, (2512), 4 states have internal predecessors, (2512), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:23:13,071 INFO L175 Difference]: Start difference. First operand has 39 places, 39 transitions, 118 flow. Second operand 3 states and 843 transitions. [2023-08-04 08:23:13,071 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 41 places, 47 transitions, 228 flow [2023-08-04 08:23:13,072 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 39 places, 47 transitions, 224 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-04 08:23:13,073 INFO L231 Difference]: Finished difference. Result has 40 places, 40 transitions, 126 flow [2023-08-04 08:23:13,073 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=628, PETRI_DIFFERENCE_MINUEND_FLOW=114, PETRI_DIFFERENCE_MINUEND_PLACES=37, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=126, PETRI_PLACES=40, PETRI_TRANSITIONS=40} [2023-08-04 08:23:13,073 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, -1 predicate places. [2023-08-04 08:23:13,074 INFO L495 AbstractCegarLoop]: Abstraction has has 40 places, 40 transitions, 126 flow [2023-08-04 08:23:13,074 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 272.0) internal successors, (816), 3 states have internal predecessors, (816), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:23:13,074 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 08:23:13,074 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 08:23:13,083 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-08-04 08:23:13,280 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 08:23:13,281 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 08:23:13,281 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 08:23:13,281 INFO L85 PathProgramCache]: Analyzing trace with hash 615812995, now seen corresponding path program 1 times [2023-08-04 08:23:13,281 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 08:23:13,281 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1880566141] [2023-08-04 08:23:13,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:23:13,282 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 08:23:13,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:23:13,383 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-04 08:23:13,384 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 08:23:13,387 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1880566141] [2023-08-04 08:23:13,388 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1880566141] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 08:23:13,388 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [378544158] [2023-08-04 08:23:13,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:23:13,388 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 08:23:13,388 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 08:23:13,389 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 08:23:13,392 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-08-04 08:23:13,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:23:13,479 INFO L262 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 08:23:13,480 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 08:23:13,489 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-08-04 08:23:13,489 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 08:23:13,490 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [378544158] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 08:23:13,490 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 08:23:13,490 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2023-08-04 08:23:13,490 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1002374884] [2023-08-04 08:23:13,490 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 08:23:13,491 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 08:23:13,491 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 08:23:13,491 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 08:23:13,492 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 08:23:13,500 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 266 out of 628 [2023-08-04 08:23:13,502 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 40 places, 40 transitions, 126 flow. Second operand has 3 states, 3 states have (on average 273.3333333333333) internal successors, (820), 3 states have internal predecessors, (820), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:23:13,502 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 08:23:13,502 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 266 of 628 [2023-08-04 08:23:13,502 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 08:23:13,629 INFO L124 PetriNetUnfolderBase]: 199/452 cut-off events. [2023-08-04 08:23:13,629 INFO L125 PetriNetUnfolderBase]: For 30/30 co-relation queries the response was YES. [2023-08-04 08:23:13,630 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1027 conditions, 452 events. 199/452 cut-off events. For 30/30 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 1680 event pairs, 152 based on Foata normal form. 0/438 useless extension candidates. Maximal degree in co-relation 615. Up to 339 conditions per place. [2023-08-04 08:23:13,632 INFO L140 encePairwiseOnDemand]: 625/628 looper letters, 43 selfloop transitions, 2 changer transitions 0/48 dead transitions. [2023-08-04 08:23:13,632 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 42 places, 48 transitions, 238 flow [2023-08-04 08:23:13,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 08:23:13,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 08:23:13,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 843 transitions. [2023-08-04 08:23:13,636 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44745222929936307 [2023-08-04 08:23:13,636 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 843 transitions. [2023-08-04 08:23:13,636 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 843 transitions. [2023-08-04 08:23:13,637 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 08:23:13,637 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 843 transitions. [2023-08-04 08:23:13,639 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 281.0) internal successors, (843), 3 states have internal predecessors, (843), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:23:13,642 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 628.0) internal successors, (2512), 4 states have internal predecessors, (2512), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:23:13,643 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 628.0) internal successors, (2512), 4 states have internal predecessors, (2512), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:23:13,644 INFO L175 Difference]: Start difference. First operand has 40 places, 40 transitions, 126 flow. Second operand 3 states and 843 transitions. [2023-08-04 08:23:13,644 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 42 places, 48 transitions, 238 flow [2023-08-04 08:23:13,646 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 48 transitions, 236 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 08:23:13,647 INFO L231 Difference]: Finished difference. Result has 42 places, 41 transitions, 136 flow [2023-08-04 08:23:13,647 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=628, PETRI_DIFFERENCE_MINUEND_FLOW=124, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=136, PETRI_PLACES=42, PETRI_TRANSITIONS=41} [2023-08-04 08:23:13,649 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 1 predicate places. [2023-08-04 08:23:13,649 INFO L495 AbstractCegarLoop]: Abstraction has has 42 places, 41 transitions, 136 flow [2023-08-04 08:23:13,650 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 273.3333333333333) internal successors, (820), 3 states have internal predecessors, (820), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:23:13,650 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 08:23:13,650 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 08:23:13,659 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-08-04 08:23:13,856 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 08:23:13,857 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 08:23:13,857 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 08:23:13,857 INFO L85 PathProgramCache]: Analyzing trace with hash -320293235, now seen corresponding path program 1 times [2023-08-04 08:23:13,857 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 08:23:13,857 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [23335888] [2023-08-04 08:23:13,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:23:13,857 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 08:23:13,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:23:13,929 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-08-04 08:23:13,929 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 08:23:13,930 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [23335888] [2023-08-04 08:23:13,930 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [23335888] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 08:23:13,930 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [142084197] [2023-08-04 08:23:13,930 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:23:13,930 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 08:23:13,930 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 08:23:13,931 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 08:23:13,934 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-08-04 08:23:14,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:23:14,024 INFO L262 TraceCheckSpWp]: Trace formula consists of 217 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 08:23:14,026 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 08:23:14,035 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-08-04 08:23:14,035 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 08:23:14,035 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [142084197] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 08:23:14,035 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 08:23:14,035 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2023-08-04 08:23:14,035 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1649025558] [2023-08-04 08:23:14,036 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 08:23:14,036 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 08:23:14,036 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 08:23:14,037 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 08:23:14,037 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 08:23:14,045 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 266 out of 628 [2023-08-04 08:23:14,046 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 41 transitions, 136 flow. Second operand has 3 states, 3 states have (on average 274.6666666666667) internal successors, (824), 3 states have internal predecessors, (824), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:23:14,047 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 08:23:14,047 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 266 of 628 [2023-08-04 08:23:14,047 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 08:23:14,150 INFO L124 PetriNetUnfolderBase]: 189/426 cut-off events. [2023-08-04 08:23:14,151 INFO L125 PetriNetUnfolderBase]: For 49/49 co-relation queries the response was YES. [2023-08-04 08:23:14,152 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1005 conditions, 426 events. 189/426 cut-off events. For 49/49 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 1529 event pairs, 171 based on Foata normal form. 0/425 useless extension candidates. Maximal degree in co-relation 628. Up to 376 conditions per place. [2023-08-04 08:23:14,153 INFO L140 encePairwiseOnDemand]: 625/628 looper letters, 37 selfloop transitions, 2 changer transitions 3/45 dead transitions. [2023-08-04 08:23:14,153 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 45 transitions, 228 flow [2023-08-04 08:23:14,154 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 08:23:14,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 08:23:14,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 839 transitions. [2023-08-04 08:23:14,157 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4453290870488323 [2023-08-04 08:23:14,157 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 839 transitions. [2023-08-04 08:23:14,157 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 839 transitions. [2023-08-04 08:23:14,158 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 08:23:14,159 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 839 transitions. [2023-08-04 08:23:14,160 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 279.6666666666667) internal successors, (839), 3 states have internal predecessors, (839), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:23:14,164 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 628.0) internal successors, (2512), 4 states have internal predecessors, (2512), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:23:14,165 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 628.0) internal successors, (2512), 4 states have internal predecessors, (2512), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:23:14,165 INFO L175 Difference]: Start difference. First operand has 42 places, 41 transitions, 136 flow. Second operand 3 states and 839 transitions. [2023-08-04 08:23:14,165 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 45 transitions, 228 flow [2023-08-04 08:23:14,167 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 43 places, 45 transitions, 226 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 08:23:14,168 INFO L231 Difference]: Finished difference. Result has 44 places, 39 transitions, 134 flow [2023-08-04 08:23:14,168 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=628, PETRI_DIFFERENCE_MINUEND_FLOW=134, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=134, PETRI_PLACES=44, PETRI_TRANSITIONS=39} [2023-08-04 08:23:14,170 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 3 predicate places. [2023-08-04 08:23:14,171 INFO L495 AbstractCegarLoop]: Abstraction has has 44 places, 39 transitions, 134 flow [2023-08-04 08:23:14,171 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 274.6666666666667) internal successors, (824), 3 states have internal predecessors, (824), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:23:14,171 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 08:23:14,171 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 08:23:14,180 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-08-04 08:23:14,377 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 08:23:14,378 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 08:23:14,378 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 08:23:14,378 INFO L85 PathProgramCache]: Analyzing trace with hash 2091609073, now seen corresponding path program 1 times [2023-08-04 08:23:14,378 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 08:23:14,378 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1754256042] [2023-08-04 08:23:14,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:23:14,379 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 08:23:14,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:23:14,469 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-08-04 08:23:14,469 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 08:23:14,473 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1754256042] [2023-08-04 08:23:14,473 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1754256042] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 08:23:14,473 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2124647390] [2023-08-04 08:23:14,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:23:14,475 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 08:23:14,475 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 08:23:14,476 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 08:23:14,495 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-08-04 08:23:14,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:23:14,583 INFO L262 TraceCheckSpWp]: Trace formula consists of 253 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-04 08:23:14,586 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 08:23:14,619 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-08-04 08:23:14,619 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 08:23:14,649 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-08-04 08:23:14,649 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2124647390] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 08:23:14,649 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 08:23:14,649 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 4 [2023-08-04 08:23:14,650 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [574797867] [2023-08-04 08:23:14,650 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 08:23:14,650 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 08:23:14,651 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 08:23:14,651 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 08:23:14,651 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-04 08:23:14,668 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 265 out of 628 [2023-08-04 08:23:14,670 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 39 transitions, 134 flow. Second operand has 5 states, 5 states have (on average 271.8) internal successors, (1359), 5 states have internal predecessors, (1359), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:23:14,670 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 08:23:14,670 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 265 of 628 [2023-08-04 08:23:14,670 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 08:23:14,687 INFO L124 PetriNetUnfolderBase]: 2/10 cut-off events. [2023-08-04 08:23:14,687 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 08:23:14,687 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35 conditions, 10 events. 2/10 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 8 event pairs, 0 based on Foata normal form. 2/12 useless extension candidates. Maximal degree in co-relation 23. Up to 6 conditions per place. [2023-08-04 08:23:14,687 INFO L140 encePairwiseOnDemand]: 625/628 looper letters, 0 selfloop transitions, 0 changer transitions 7/7 dead transitions. [2023-08-04 08:23:14,687 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 19 places, 7 transitions, 32 flow [2023-08-04 08:23:14,687 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 08:23:14,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 08:23:14,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1068 transitions. [2023-08-04 08:23:14,691 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4251592356687898 [2023-08-04 08:23:14,691 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1068 transitions. [2023-08-04 08:23:14,691 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1068 transitions. [2023-08-04 08:23:14,691 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 08:23:14,692 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1068 transitions. [2023-08-04 08:23:14,694 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 267.0) internal successors, (1068), 4 states have internal predecessors, (1068), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:23:14,697 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 628.0) internal successors, (3140), 5 states have internal predecessors, (3140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:23:14,698 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 628.0) internal successors, (3140), 5 states have internal predecessors, (3140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:23:14,698 INFO L175 Difference]: Start difference. First operand has 44 places, 39 transitions, 134 flow. Second operand 4 states and 1068 transitions. [2023-08-04 08:23:14,698 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 19 places, 7 transitions, 32 flow [2023-08-04 08:23:14,699 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 18 places, 7 transitions, 30 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 08:23:14,699 INFO L231 Difference]: Finished difference. Result has 18 places, 0 transitions, 0 flow [2023-08-04 08:23:14,699 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=628, PETRI_DIFFERENCE_MINUEND_FLOW=12, PETRI_DIFFERENCE_MINUEND_PLACES=15, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=5, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=5, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=0, PETRI_PLACES=18, PETRI_TRANSITIONS=0} [2023-08-04 08:23:14,699 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, -23 predicate places. [2023-08-04 08:23:14,699 INFO L495 AbstractCegarLoop]: Abstraction has has 18 places, 0 transitions, 0 flow [2023-08-04 08:23:14,700 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 271.8) internal successors, (1359), 5 states have internal predecessors, (1359), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:23:14,703 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2023-08-04 08:23:14,712 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-08-04 08:23:14,912 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 08:23:14,913 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1, 1] [2023-08-04 08:23:14,915 INFO L307 ceAbstractionStarter]: Result for error location AllErrorsAtOnce was SAFE (1/2) [2023-08-04 08:23:14,919 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 281 places, 303 transitions, 648 flow [2023-08-04 08:23:15,027 INFO L124 PetriNetUnfolderBase]: 118/961 cut-off events. [2023-08-04 08:23:15,027 INFO L125 PetriNetUnfolderBase]: For 36/72 co-relation queries the response was YES. [2023-08-04 08:23:15,036 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1022 conditions, 961 events. 118/961 cut-off events. For 36/72 co-relation queries the response was YES. Maximal size of possible extension queue 24. Compared 5605 event pairs, 0 based on Foata normal form. 0/818 useless extension candidates. Maximal degree in co-relation 493. Up to 16 conditions per place. [2023-08-04 08:23:15,036 INFO L82 GeneralOperation]: Start removeDead. Operand has 281 places, 303 transitions, 648 flow [2023-08-04 08:23:15,042 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 281 places, 303 transitions, 648 flow [2023-08-04 08:23:15,042 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-04 08:23:15,042 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 281 places, 303 transitions, 648 flow [2023-08-04 08:23:15,042 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 281 places, 303 transitions, 648 flow [2023-08-04 08:23:15,042 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 281 places, 303 transitions, 648 flow [2023-08-04 08:23:15,141 INFO L124 PetriNetUnfolderBase]: 118/961 cut-off events. [2023-08-04 08:23:15,141 INFO L125 PetriNetUnfolderBase]: For 36/72 co-relation queries the response was YES. [2023-08-04 08:23:15,151 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1022 conditions, 961 events. 118/961 cut-off events. For 36/72 co-relation queries the response was YES. Maximal size of possible extension queue 24. Compared 5605 event pairs, 0 based on Foata normal form. 0/818 useless extension candidates. Maximal degree in co-relation 493. Up to 16 conditions per place. [2023-08-04 08:23:15,176 INFO L119 LiptonReduction]: Number of co-enabled transitions 36660 [2023-08-04 08:23:22,499 INFO L134 LiptonReduction]: Checked pairs total: 38528 [2023-08-04 08:23:22,500 INFO L136 LiptonReduction]: Total number of compositions: 328 [2023-08-04 08:23:22,501 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-04 08:23:22,502 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;@67e45a27, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-04 08:23:22,502 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2023-08-04 08:23:22,505 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-04 08:23:22,505 INFO L124 PetriNetUnfolderBase]: 0/26 cut-off events. [2023-08-04 08:23:22,505 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 08:23:22,505 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 08:23:22,505 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2023-08-04 08:23:22,505 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-04 08:23:22,506 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 08:23:22,506 INFO L85 PathProgramCache]: Analyzing trace with hash -1946838377, now seen corresponding path program 1 times [2023-08-04 08:23:22,506 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 08:23:22,506 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [121759073] [2023-08-04 08:23:22,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:23:22,506 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 08:23:22,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-04 08:23:22,520 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-04 08:23:22,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-04 08:23:22,542 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-04 08:23:22,542 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-04 08:23:22,542 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (2 of 3 remaining) [2023-08-04 08:23:22,542 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 3 remaining) [2023-08-04 08:23:22,542 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 3 remaining) [2023-08-04 08:23:22,542 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-08-04 08:23:22,543 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-04 08:23:22,543 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE,UNKNOWN,UNKNOWN (2/2) [2023-08-04 08:23:22,544 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-04 08:23:22,544 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-08-04 08:23:22,587 INFO L144 ThreadInstanceAdder]: Constructed 18 joinOtherThreadTransitions. [2023-08-04 08:23:22,590 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 419 places, 456 transitions, 1002 flow [2023-08-04 08:23:23,783 INFO L124 PetriNetUnfolderBase]: 1002/5489 cut-off events. [2023-08-04 08:23:23,783 INFO L125 PetriNetUnfolderBase]: For 602/926 co-relation queries the response was YES. [2023-08-04 08:23:23,912 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6163 conditions, 5489 events. 1002/5489 cut-off events. For 602/926 co-relation queries the response was YES. Maximal size of possible extension queue 154. Compared 48058 event pairs, 26 based on Foata normal form. 0/4611 useless extension candidates. Maximal degree in co-relation 3278. Up to 192 conditions per place. [2023-08-04 08:23:23,912 INFO L82 GeneralOperation]: Start removeDead. Operand has 419 places, 456 transitions, 1002 flow [2023-08-04 08:23:23,957 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 419 places, 456 transitions, 1002 flow [2023-08-04 08:23:23,957 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-04 08:23:23,957 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 419 places, 456 transitions, 1002 flow [2023-08-04 08:23:23,957 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 419 places, 456 transitions, 1002 flow [2023-08-04 08:23:23,957 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 419 places, 456 transitions, 1002 flow [2023-08-04 08:23:25,179 INFO L124 PetriNetUnfolderBase]: 1002/5489 cut-off events. [2023-08-04 08:23:25,179 INFO L125 PetriNetUnfolderBase]: For 602/926 co-relation queries the response was YES. [2023-08-04 08:23:25,283 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6163 conditions, 5489 events. 1002/5489 cut-off events. For 602/926 co-relation queries the response was YES. Maximal size of possible extension queue 154. Compared 48058 event pairs, 26 based on Foata normal form. 0/4611 useless extension candidates. Maximal degree in co-relation 3278. Up to 192 conditions per place. [2023-08-04 08:23:25,659 INFO L119 LiptonReduction]: Number of co-enabled transitions 119004 [2023-08-04 08:23:37,025 INFO L134 LiptonReduction]: Checked pairs total: 136689 [2023-08-04 08:23:37,026 INFO L136 LiptonReduction]: Total number of compositions: 516 [2023-08-04 08:23:37,027 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-04 08:23:37,027 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;@67e45a27, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-04 08:23:37,027 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-04 08:23:37,030 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-04 08:23:37,030 INFO L124 PetriNetUnfolderBase]: 1/34 cut-off events. [2023-08-04 08:23:37,030 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-08-04 08:23:37,030 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 08:23:37,030 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 08:23:37,030 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 08:23:37,030 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 08:23:37,030 INFO L85 PathProgramCache]: Analyzing trace with hash -417824508, now seen corresponding path program 1 times [2023-08-04 08:23:37,030 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 08:23:37,030 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1287906487] [2023-08-04 08:23:37,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:23:37,030 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 08:23:37,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:23:37,049 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-04 08:23:37,049 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 08:23:37,049 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1287906487] [2023-08-04 08:23:37,049 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1287906487] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 08:23:37,049 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 08:23:37,050 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-04 08:23:37,050 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1942713228] [2023-08-04 08:23:37,050 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 08:23:37,050 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 08:23:37,050 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 08:23:37,050 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 08:23:37,051 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-04 08:23:37,059 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 395 out of 972 [2023-08-04 08:23:37,060 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 62 transitions, 214 flow. Second operand has 3 states, 3 states have (on average 397.3333333333333) internal successors, (1192), 3 states have internal predecessors, (1192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:23:37,060 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 08:23:37,060 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 395 of 972 [2023-08-04 08:23:37,060 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 08:23:40,435 INFO L124 PetriNetUnfolderBase]: 21389/32791 cut-off events. [2023-08-04 08:23:40,435 INFO L125 PetriNetUnfolderBase]: For 6700/6700 co-relation queries the response was YES. [2023-08-04 08:23:40,504 INFO L83 FinitePrefix]: Finished finitePrefix Result has 67957 conditions, 32791 events. 21389/32791 cut-off events. For 6700/6700 co-relation queries the response was YES. Maximal size of possible extension queue 782. Compared 215767 event pairs, 14517 based on Foata normal form. 729/30971 useless extension candidates. Maximal degree in co-relation 27444. Up to 30193 conditions per place. [2023-08-04 08:23:40,634 INFO L140 encePairwiseOnDemand]: 967/972 looper letters, 51 selfloop transitions, 2 changer transitions 3/63 dead transitions. [2023-08-04 08:23:40,634 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 63 transitions, 322 flow [2023-08-04 08:23:40,634 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 08:23:40,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 08:23:40,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1241 transitions. [2023-08-04 08:23:40,638 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4255829903978052 [2023-08-04 08:23:40,639 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1241 transitions. [2023-08-04 08:23:40,639 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1241 transitions. [2023-08-04 08:23:40,639 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 08:23:40,639 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1241 transitions. [2023-08-04 08:23:40,642 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 413.6666666666667) internal successors, (1241), 3 states have internal predecessors, (1241), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:23:40,646 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 972.0) internal successors, (3888), 4 states have internal predecessors, (3888), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:23:40,647 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 972.0) internal successors, (3888), 4 states have internal predecessors, (3888), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:23:40,647 INFO L175 Difference]: Start difference. First operand has 56 places, 62 transitions, 214 flow. Second operand 3 states and 1241 transitions. [2023-08-04 08:23:40,647 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 63 transitions, 322 flow [2023-08-04 08:23:40,654 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 08:23:40,655 INFO L231 Difference]: Finished difference. Result has 58 places, 58 transitions, 204 flow [2023-08-04 08:23:40,656 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=972, 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 08:23:40,656 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 2 predicate places. [2023-08-04 08:23:40,656 INFO L495 AbstractCegarLoop]: Abstraction has has 58 places, 58 transitions, 204 flow [2023-08-04 08:23:40,657 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 397.3333333333333) internal successors, (1192), 3 states have internal predecessors, (1192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:23:40,657 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 08:23:40,657 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 08:23:40,657 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-08-04 08:23:40,657 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 08:23:40,658 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 08:23:40,658 INFO L85 PathProgramCache]: Analyzing trace with hash 1936271346, now seen corresponding path program 1 times [2023-08-04 08:23:40,658 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 08:23:40,658 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [436855561] [2023-08-04 08:23:40,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:23:40,658 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 08:23:40,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:23:40,690 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-04 08:23:40,691 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 08:23:40,691 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [436855561] [2023-08-04 08:23:40,691 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [436855561] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 08:23:40,691 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [263452972] [2023-08-04 08:23:40,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:23:40,691 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 08:23:40,691 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 08:23:40,692 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 08:23:40,694 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-08-04 08:23:40,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:23:40,780 INFO L262 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 08:23:40,781 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 08:23:40,789 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-04 08:23:40,789 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 08:23:40,789 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [263452972] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 08:23:40,789 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 08:23:40,789 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2023-08-04 08:23:40,791 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2078622356] [2023-08-04 08:23:40,791 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 08:23:40,792 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 08:23:40,792 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 08:23:40,792 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 08:23:40,793 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 08:23:40,803 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 395 out of 972 [2023-08-04 08:23:40,804 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 58 transitions, 204 flow. Second operand has 3 states, 3 states have (on average 398.6666666666667) internal successors, (1196), 3 states have internal predecessors, (1196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:23:40,804 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 08:23:40,805 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 395 of 972 [2023-08-04 08:23:40,805 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 08:23:43,921 INFO L124 PetriNetUnfolderBase]: 21175/32283 cut-off events. [2023-08-04 08:23:43,921 INFO L125 PetriNetUnfolderBase]: For 6457/6457 co-relation queries the response was YES. [2023-08-04 08:23:43,990 INFO L83 FinitePrefix]: Finished finitePrefix Result has 66888 conditions, 32283 events. 21175/32283 cut-off events. For 6457/6457 co-relation queries the response was YES. Maximal size of possible extension queue 801. Compared 209970 event pairs, 14444 based on Foata normal form. 0/29808 useless extension candidates. Maximal degree in co-relation 66858. Up to 29819 conditions per place. [2023-08-04 08:23:44,103 INFO L140 encePairwiseOnDemand]: 969/972 looper letters, 54 selfloop transitions, 2 changer transitions 0/63 dead transitions. [2023-08-04 08:23:44,103 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 63 transitions, 326 flow [2023-08-04 08:23:44,104 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 08:23:44,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 08:23:44,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1241 transitions. [2023-08-04 08:23:44,107 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4255829903978052 [2023-08-04 08:23:44,107 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1241 transitions. [2023-08-04 08:23:44,107 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1241 transitions. [2023-08-04 08:23:44,108 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 08:23:44,108 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1241 transitions. [2023-08-04 08:23:44,111 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 413.6666666666667) internal successors, (1241), 3 states have internal predecessors, (1241), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:23:44,115 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 972.0) internal successors, (3888), 4 states have internal predecessors, (3888), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:23:44,116 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 972.0) internal successors, (3888), 4 states have internal predecessors, (3888), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:23:44,116 INFO L175 Difference]: Start difference. First operand has 58 places, 58 transitions, 204 flow. Second operand 3 states and 1241 transitions. [2023-08-04 08:23:44,116 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 63 transitions, 326 flow [2023-08-04 08:23:44,141 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 08:23:44,142 INFO L231 Difference]: Finished difference. Result has 54 places, 59 transitions, 202 flow [2023-08-04 08:23:44,142 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=972, 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 08:23:44,143 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, -2 predicate places. [2023-08-04 08:23:44,143 INFO L495 AbstractCegarLoop]: Abstraction has has 54 places, 59 transitions, 202 flow [2023-08-04 08:23:44,144 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 398.6666666666667) internal successors, (1196), 3 states have internal predecessors, (1196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:23:44,144 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 08:23:44,144 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 08:23:44,149 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-08-04 08:23:44,349 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 08:23:44,350 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 08:23:44,350 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 08:23:44,350 INFO L85 PathProgramCache]: Analyzing trace with hash 252772791, now seen corresponding path program 1 times [2023-08-04 08:23:44,350 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 08:23:44,350 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [448977225] [2023-08-04 08:23:44,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:23:44,350 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 08:23:44,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:23:44,387 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-04 08:23:44,387 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 08:23:44,387 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [448977225] [2023-08-04 08:23:44,388 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [448977225] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 08:23:44,388 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [809651585] [2023-08-04 08:23:44,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:23:44,388 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 08:23:44,388 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 08:23:44,389 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 08:23:44,391 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-08-04 08:23:44,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:23:44,475 INFO L262 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 08:23:44,476 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 08:23:44,482 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-04 08:23:44,482 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 08:23:44,483 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [809651585] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 08:23:44,483 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 08:23:44,483 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2023-08-04 08:23:44,483 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [969688670] [2023-08-04 08:23:44,483 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 08:23:44,483 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 08:23:44,483 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 08:23:44,484 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 08:23:44,484 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 08:23:44,494 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 395 out of 972 [2023-08-04 08:23:44,496 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 59 transitions, 202 flow. Second operand has 3 states, 3 states have (on average 399.6666666666667) internal successors, (1199), 3 states have internal predecessors, (1199), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:23:44,496 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 08:23:44,496 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 395 of 972 [2023-08-04 08:23:44,496 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 08:23:47,570 INFO L124 PetriNetUnfolderBase]: 21139/32679 cut-off events. [2023-08-04 08:23:47,571 INFO L125 PetriNetUnfolderBase]: For 2634/2634 co-relation queries the response was YES. [2023-08-04 08:23:47,616 INFO L83 FinitePrefix]: Finished finitePrefix Result has 67251 conditions, 32679 events. 21139/32679 cut-off events. For 2634/2634 co-relation queries the response was YES. Maximal size of possible extension queue 896. Compared 218311 event pairs, 14389 based on Foata normal form. 0/30276 useless extension candidates. Maximal degree in co-relation 29434. Up to 29443 conditions per place. [2023-08-04 08:23:47,681 INFO L140 encePairwiseOnDemand]: 969/972 looper letters, 57 selfloop transitions, 2 changer transitions 0/66 dead transitions. [2023-08-04 08:23:47,682 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 66 transitions, 334 flow [2023-08-04 08:23:47,682 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 08:23:47,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 08:23:47,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1243 transitions. [2023-08-04 08:23:47,685 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42626886145404663 [2023-08-04 08:23:47,685 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1243 transitions. [2023-08-04 08:23:47,685 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1243 transitions. [2023-08-04 08:23:47,686 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 08:23:47,686 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1243 transitions. [2023-08-04 08:23:47,688 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 414.3333333333333) internal successors, (1243), 3 states have internal predecessors, (1243), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:23:47,692 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 972.0) internal successors, (3888), 4 states have internal predecessors, (3888), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:23:47,692 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 972.0) internal successors, (3888), 4 states have internal predecessors, (3888), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:23:47,693 INFO L175 Difference]: Start difference. First operand has 54 places, 59 transitions, 202 flow. Second operand 3 states and 1243 transitions. [2023-08-04 08:23:47,693 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 66 transitions, 334 flow [2023-08-04 08:23:47,695 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 08:23:47,696 INFO L231 Difference]: Finished difference. Result has 56 places, 60 transitions, 212 flow [2023-08-04 08:23:47,697 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=972, 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 08:23:47,697 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 0 predicate places. [2023-08-04 08:23:47,697 INFO L495 AbstractCegarLoop]: Abstraction has has 56 places, 60 transitions, 212 flow [2023-08-04 08:23:47,698 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 399.6666666666667) internal successors, (1199), 3 states have internal predecessors, (1199), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:23:47,698 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 08:23:47,698 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 08:23:47,705 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-08-04 08:23:47,902 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,SelfDestructingSolverStorable10 [2023-08-04 08:23:47,902 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 08:23:47,903 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 08:23:47,903 INFO L85 PathProgramCache]: Analyzing trace with hash 1476972299, now seen corresponding path program 1 times [2023-08-04 08:23:47,903 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 08:23:47,903 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2011292944] [2023-08-04 08:23:47,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:23:47,903 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 08:23:47,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:23:47,941 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-04 08:23:47,942 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 08:23:47,942 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2011292944] [2023-08-04 08:23:47,942 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2011292944] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 08:23:47,942 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [619003338] [2023-08-04 08:23:47,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:23:47,942 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 08:23:47,942 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 08:23:47,943 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 08:23:47,945 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-08-04 08:23:48,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:23:48,033 INFO L262 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 08:23:48,034 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 08:23:48,042 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-04 08:23:48,042 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 08:23:48,042 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [619003338] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 08:23:48,042 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 08:23:48,042 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2023-08-04 08:23:48,042 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1790359960] [2023-08-04 08:23:48,042 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 08:23:48,043 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 08:23:48,044 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 08:23:48,044 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 08:23:48,044 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 08:23:48,053 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 395 out of 972 [2023-08-04 08:23:48,060 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 60 transitions, 212 flow. Second operand has 3 states, 3 states have (on average 400.6666666666667) internal successors, (1202), 3 states have internal predecessors, (1202), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:23:48,060 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 08:23:48,060 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 395 of 972 [2023-08-04 08:23:48,060 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 08:23:51,086 INFO L124 PetriNetUnfolderBase]: 20051/31247 cut-off events. [2023-08-04 08:23:51,086 INFO L125 PetriNetUnfolderBase]: For 2910/2910 co-relation queries the response was YES. [2023-08-04 08:23:51,165 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 211281 event pairs, 14329 based on Foata normal form. 0/29252 useless extension candidates. Maximal degree in co-relation 30954. Up to 25511 conditions per place. [2023-08-04 08:23:51,234 INFO L140 encePairwiseOnDemand]: 969/972 looper letters, 65 selfloop transitions, 2 changer transitions 0/74 dead transitions. [2023-08-04 08:23:51,234 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 74 transitions, 389 flow [2023-08-04 08:23:51,235 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 08:23:51,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 08:23:51,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1250 transitions. [2023-08-04 08:23:51,237 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4286694101508916 [2023-08-04 08:23:51,237 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1250 transitions. [2023-08-04 08:23:51,237 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1250 transitions. [2023-08-04 08:23:51,238 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 08:23:51,238 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1250 transitions. [2023-08-04 08:23:51,241 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 416.6666666666667) internal successors, (1250), 3 states have internal predecessors, (1250), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:23:51,244 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 972.0) internal successors, (3888), 4 states have internal predecessors, (3888), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:23:51,244 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 972.0) internal successors, (3888), 4 states have internal predecessors, (3888), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:23:51,245 INFO L175 Difference]: Start difference. First operand has 56 places, 60 transitions, 212 flow. Second operand 3 states and 1250 transitions. [2023-08-04 08:23:51,245 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 74 transitions, 389 flow [2023-08-04 08:23:51,249 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 08:23:51,250 INFO L231 Difference]: Finished difference. Result has 58 places, 61 transitions, 222 flow [2023-08-04 08:23:51,250 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=972, 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 08:23:51,250 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 2 predicate places. [2023-08-04 08:23:51,250 INFO L495 AbstractCegarLoop]: Abstraction has has 58 places, 61 transitions, 222 flow [2023-08-04 08:23:51,251 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 400.6666666666667) internal successors, (1202), 3 states have internal predecessors, (1202), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:23:51,251 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 08:23:51,251 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 08:23:51,260 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-08-04 08:23:51,456 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 08:23:51,456 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 08:23:51,456 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 08:23:51,456 INFO L85 PathProgramCache]: Analyzing trace with hash 103601360, now seen corresponding path program 1 times [2023-08-04 08:23:51,457 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 08:23:51,457 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1272171163] [2023-08-04 08:23:51,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:23:51,457 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 08:23:51,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:23:51,501 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-04 08:23:51,501 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 08:23:51,501 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1272171163] [2023-08-04 08:23:51,501 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1272171163] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 08:23:51,501 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1790979612] [2023-08-04 08:23:51,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:23:51,501 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 08:23:51,502 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 08:23:51,502 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 08:23:51,509 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-08-04 08:23:51,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:23:51,604 INFO L262 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 08:23:51,608 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 08:23:51,615 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-08-04 08:23:51,615 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 08:23:51,615 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1790979612] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 08:23:51,615 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 08:23:51,615 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2023-08-04 08:23:51,615 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [495533693] [2023-08-04 08:23:51,616 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 08:23:51,616 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 08:23:51,616 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 08:23:51,616 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 08:23:51,616 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 08:23:51,625 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 395 out of 972 [2023-08-04 08:23:51,626 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 61 transitions, 222 flow. Second operand has 3 states, 3 states have (on average 402.0) internal successors, (1206), 3 states have internal predecessors, (1206), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:23:51,626 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 08:23:51,626 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 395 of 972 [2023-08-04 08:23:51,626 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 08:23:54,801 INFO L124 PetriNetUnfolderBase]: 19362/30530 cut-off events. [2023-08-04 08:23:54,801 INFO L125 PetriNetUnfolderBase]: For 4852/4852 co-relation queries the response was YES. [2023-08-04 08:23:54,854 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 205767 event pairs, 13038 based on Foata normal form. 0/29584 useless extension candidates. Maximal degree in co-relation 34160. Up to 22127 conditions per place. [2023-08-04 08:23:54,919 INFO L140 encePairwiseOnDemand]: 969/972 looper letters, 66 selfloop transitions, 2 changer transitions 0/75 dead transitions. [2023-08-04 08:23:54,919 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 75 transitions, 401 flow [2023-08-04 08:23:54,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 08:23:54,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 08:23:54,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1250 transitions. [2023-08-04 08:23:54,922 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4286694101508916 [2023-08-04 08:23:54,922 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1250 transitions. [2023-08-04 08:23:54,922 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1250 transitions. [2023-08-04 08:23:54,922 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 08:23:54,923 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1250 transitions. [2023-08-04 08:23:54,924 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 416.6666666666667) internal successors, (1250), 3 states have internal predecessors, (1250), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:23:54,928 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 972.0) internal successors, (3888), 4 states have internal predecessors, (3888), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:23:54,928 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 972.0) internal successors, (3888), 4 states have internal predecessors, (3888), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:23:54,928 INFO L175 Difference]: Start difference. First operand has 58 places, 61 transitions, 222 flow. Second operand 3 states and 1250 transitions. [2023-08-04 08:23:54,928 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 75 transitions, 401 flow [2023-08-04 08:23:54,942 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 08:23:54,944 INFO L231 Difference]: Finished difference. Result has 60 places, 62 transitions, 232 flow [2023-08-04 08:23:54,944 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=972, 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 08:23:54,944 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 4 predicate places. [2023-08-04 08:23:54,944 INFO L495 AbstractCegarLoop]: Abstraction has has 60 places, 62 transitions, 232 flow [2023-08-04 08:23:54,945 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 402.0) internal successors, (1206), 3 states have internal predecessors, (1206), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:23:54,945 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 08:23:54,945 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 08:23:54,950 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-08-04 08:23:55,150 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,SelfDestructingSolverStorable12 [2023-08-04 08:23:55,150 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 08:23:55,151 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 08:23:55,151 INFO L85 PathProgramCache]: Analyzing trace with hash 34308452, now seen corresponding path program 1 times [2023-08-04 08:23:55,151 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 08:23:55,151 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1795748107] [2023-08-04 08:23:55,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:23:55,151 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 08:23:55,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:23:55,211 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-08-04 08:23:55,211 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 08:23:55,211 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1795748107] [2023-08-04 08:23:55,211 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1795748107] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 08:23:55,211 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1261206090] [2023-08-04 08:23:55,211 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:23:55,211 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 08:23:55,212 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 08:23:55,213 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 08:23:55,217 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-08-04 08:23:55,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:23:55,309 INFO L262 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 08:23:55,310 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 08:23:55,316 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-08-04 08:23:55,316 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 08:23:55,316 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1261206090] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 08:23:55,316 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 08:23:55,316 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2023-08-04 08:23:55,316 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1911828095] [2023-08-04 08:23:55,316 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 08:23:55,317 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 08:23:55,317 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 08:23:55,317 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 08:23:55,317 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 08:23:55,329 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 395 out of 972 [2023-08-04 08:23:55,330 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 62 transitions, 232 flow. Second operand has 3 states, 3 states have (on average 403.3333333333333) internal successors, (1210), 3 states have internal predecessors, (1210), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:23:55,330 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 08:23:55,330 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 395 of 972 [2023-08-04 08:23:55,330 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 08:23:58,302 INFO L124 PetriNetUnfolderBase]: 19153/30213 cut-off events. [2023-08-04 08:23:58,302 INFO L125 PetriNetUnfolderBase]: For 5944/5944 co-relation queries the response was YES. [2023-08-04 08:23:58,345 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 199117 event pairs, 14429 based on Foata normal form. 0/29980 useless extension candidates. Maximal degree in co-relation 36015. Up to 24281 conditions per place. [2023-08-04 08:23:58,411 INFO L140 encePairwiseOnDemand]: 969/972 looper letters, 67 selfloop transitions, 2 changer transitions 0/76 dead transitions. [2023-08-04 08:23:58,411 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 76 transitions, 413 flow [2023-08-04 08:23:58,412 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 08:23:58,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 08:23:58,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1250 transitions. [2023-08-04 08:23:58,414 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4286694101508916 [2023-08-04 08:23:58,414 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1250 transitions. [2023-08-04 08:23:58,414 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1250 transitions. [2023-08-04 08:23:58,414 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 08:23:58,414 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1250 transitions. [2023-08-04 08:23:58,416 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 416.6666666666667) internal successors, (1250), 3 states have internal predecessors, (1250), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:23:58,419 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 972.0) internal successors, (3888), 4 states have internal predecessors, (3888), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:23:58,420 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 972.0) internal successors, (3888), 4 states have internal predecessors, (3888), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:23:58,420 INFO L175 Difference]: Start difference. First operand has 60 places, 62 transitions, 232 flow. Second operand 3 states and 1250 transitions. [2023-08-04 08:23:58,420 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 76 transitions, 413 flow [2023-08-04 08:23:58,581 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 08:23:58,581 INFO L231 Difference]: Finished difference. Result has 62 places, 63 transitions, 242 flow [2023-08-04 08:23:58,582 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=972, 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 08:23:58,582 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 6 predicate places. [2023-08-04 08:23:58,582 INFO L495 AbstractCegarLoop]: Abstraction has has 62 places, 63 transitions, 242 flow [2023-08-04 08:23:58,583 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 403.3333333333333) internal successors, (1210), 3 states have internal predecessors, (1210), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:23:58,583 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 08:23:58,583 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 08:23:58,587 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2023-08-04 08:23:58,783 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,SelfDestructingSolverStorable13 [2023-08-04 08:23:58,784 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 08:23:58,784 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 08:23:58,784 INFO L85 PathProgramCache]: Analyzing trace with hash -1220710004, now seen corresponding path program 1 times [2023-08-04 08:23:58,784 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 08:23:58,784 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1926178637] [2023-08-04 08:23:58,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:23:58,784 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 08:23:58,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:23:58,843 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-08-04 08:23:58,843 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 08:23:58,843 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1926178637] [2023-08-04 08:23:58,844 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1926178637] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 08:23:58,844 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1936832206] [2023-08-04 08:23:58,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:23:58,844 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 08:23:58,844 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 08:23:58,845 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 08:23:58,847 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-08-04 08:23:58,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:23:58,942 INFO L262 TraceCheckSpWp]: Trace formula consists of 259 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-04 08:23:58,943 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 08:23:58,954 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-08-04 08:23:58,954 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 08:23:58,968 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 08:23:58,968 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1936832206] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 08:23:58,968 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 08:23:58,968 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 4 [2023-08-04 08:23:58,968 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [729971603] [2023-08-04 08:23:58,969 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 08:23:58,969 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 08:23:58,969 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 08:23:58,969 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 08:23:58,969 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-04 08:23:58,981 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 394 out of 972 [2023-08-04 08:23:58,983 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 63 transitions, 242 flow. Second operand has 5 states, 5 states have (on average 400.6) internal successors, (2003), 5 states have internal predecessors, (2003), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:23:58,983 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 08:23:58,983 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 394 of 972 [2023-08-04 08:23:58,983 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 08:24:01,917 INFO L124 PetriNetUnfolderBase]: 17997/28375 cut-off events. [2023-08-04 08:24:01,917 INFO L125 PetriNetUnfolderBase]: For 5479/5479 co-relation queries the response was YES. [2023-08-04 08:24:01,996 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 188201 event pairs, 10395 based on Foata normal form. 2/28377 useless extension candidates. Maximal degree in co-relation 48888. Up to 26179 conditions per place. [2023-08-04 08:24:02,089 INFO L140 encePairwiseOnDemand]: 968/972 looper letters, 57 selfloop transitions, 3 changer transitions 1/68 dead transitions. [2023-08-04 08:24:02,089 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 68 transitions, 374 flow [2023-08-04 08:24:02,089 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 08:24:02,090 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 08:24:02,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1633 transitions. [2023-08-04 08:24:02,093 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4200102880658436 [2023-08-04 08:24:02,093 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1633 transitions. [2023-08-04 08:24:02,093 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1633 transitions. [2023-08-04 08:24:02,094 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 08:24:02,094 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1633 transitions. [2023-08-04 08:24:02,096 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 408.25) internal successors, (1633), 4 states have internal predecessors, (1633), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:24:02,101 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 972.0) internal successors, (4860), 5 states have internal predecessors, (4860), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:24:02,102 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 972.0) internal successors, (4860), 5 states have internal predecessors, (4860), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:24:02,102 INFO L175 Difference]: Start difference. First operand has 62 places, 63 transitions, 242 flow. Second operand 4 states and 1633 transitions. [2023-08-04 08:24:02,102 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 68 transitions, 374 flow [2023-08-04 08:24:02,416 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 08:24:02,417 INFO L231 Difference]: Finished difference. Result has 66 places, 63 transitions, 254 flow [2023-08-04 08:24:02,417 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=972, 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 08:24:02,417 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 10 predicate places. [2023-08-04 08:24:02,417 INFO L495 AbstractCegarLoop]: Abstraction has has 66 places, 63 transitions, 254 flow [2023-08-04 08:24:02,418 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 400.6) internal successors, (2003), 5 states have internal predecessors, (2003), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:24:02,418 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 08:24:02,418 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 08:24:02,425 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 08:24:02,623 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,SelfDestructingSolverStorable14 [2023-08-04 08:24:02,623 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 08:24:02,624 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 08:24:02,624 INFO L85 PathProgramCache]: Analyzing trace with hash 1163452674, now seen corresponding path program 1 times [2023-08-04 08:24:02,624 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 08:24:02,624 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [662303562] [2023-08-04 08:24:02,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:24:02,624 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 08:24:02,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:24:02,691 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 08:24:02,691 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 08:24:02,691 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [662303562] [2023-08-04 08:24:02,691 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [662303562] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 08:24:02,691 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2081761428] [2023-08-04 08:24:02,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:24:02,692 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 08:24:02,692 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 08:24:02,693 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 08:24:02,695 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-08-04 08:24:02,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:24:02,805 INFO L262 TraceCheckSpWp]: Trace formula consists of 273 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-04 08:24:02,806 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 08:24:02,819 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 08:24:02,819 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 08:24:02,833 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 08:24:02,834 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2081761428] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 08:24:02,834 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 08:24:02,834 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 5 [2023-08-04 08:24:02,834 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [378693220] [2023-08-04 08:24:02,834 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 08:24:02,834 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 08:24:02,835 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 08:24:02,835 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 08:24:02,835 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-04 08:24:02,847 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 394 out of 972 [2023-08-04 08:24:02,849 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 63 transitions, 254 flow. Second operand has 5 states, 5 states have (on average 400.8) internal successors, (2004), 5 states have internal predecessors, (2004), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:24:02,849 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 08:24:02,849 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 394 of 972 [2023-08-04 08:24:02,849 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 08:24:05,567 INFO L124 PetriNetUnfolderBase]: 17145/27047 cut-off events. [2023-08-04 08:24:05,567 INFO L125 PetriNetUnfolderBase]: For 4623/4623 co-relation queries the response was YES. [2023-08-04 08:24:05,653 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 179612 event pairs, 10068 based on Foata normal form. 8/27055 useless extension candidates. Maximal degree in co-relation 45955. Up to 24835 conditions per place. [2023-08-04 08:24:05,714 INFO L140 encePairwiseOnDemand]: 968/972 looper letters, 61 selfloop transitions, 3 changer transitions 1/72 dead transitions. [2023-08-04 08:24:05,714 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 72 transitions, 402 flow [2023-08-04 08:24:05,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 08:24:05,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 08:24:05,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1637 transitions. [2023-08-04 08:24:05,717 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4210390946502058 [2023-08-04 08:24:05,717 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1637 transitions. [2023-08-04 08:24:05,717 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1637 transitions. [2023-08-04 08:24:05,717 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 08:24:05,718 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1637 transitions. [2023-08-04 08:24:05,719 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 409.25) internal successors, (1637), 4 states have internal predecessors, (1637), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:24:05,722 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 972.0) internal successors, (4860), 5 states have internal predecessors, (4860), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:24:05,722 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 972.0) internal successors, (4860), 5 states have internal predecessors, (4860), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:24:05,723 INFO L175 Difference]: Start difference. First operand has 66 places, 63 transitions, 254 flow. Second operand 4 states and 1637 transitions. [2023-08-04 08:24:05,723 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 72 transitions, 402 flow [2023-08-04 08:24:05,894 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 08:24:05,895 INFO L231 Difference]: Finished difference. Result has 68 places, 63 transitions, 258 flow [2023-08-04 08:24:05,895 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=972, 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 08:24:05,895 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 12 predicate places. [2023-08-04 08:24:05,896 INFO L495 AbstractCegarLoop]: Abstraction has has 68 places, 63 transitions, 258 flow [2023-08-04 08:24:05,896 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 400.8) internal successors, (2004), 5 states have internal predecessors, (2004), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:24:05,896 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 08:24:05,896 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 08:24:05,905 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2023-08-04 08:24:06,101 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,SelfDestructingSolverStorable15 [2023-08-04 08:24:06,101 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 08:24:06,102 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 08:24:06,102 INFO L85 PathProgramCache]: Analyzing trace with hash 402989738, now seen corresponding path program 1 times [2023-08-04 08:24:06,102 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 08:24:06,102 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [807133217] [2023-08-04 08:24:06,102 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:24:06,102 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 08:24:06,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:24:06,205 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 08:24:06,206 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 08:24:06,206 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [807133217] [2023-08-04 08:24:06,206 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [807133217] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 08:24:06,206 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [8630809] [2023-08-04 08:24:06,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:24:06,206 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 08:24:06,206 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 08:24:06,209 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 08:24:06,238 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-08-04 08:24:06,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:24:06,337 INFO L262 TraceCheckSpWp]: Trace formula consists of 287 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-04 08:24:06,338 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 08:24:06,348 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 08:24:06,348 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 08:24:06,360 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 08:24:06,361 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [8630809] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 08:24:06,361 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 08:24:06,361 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 5 [2023-08-04 08:24:06,361 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [376579279] [2023-08-04 08:24:06,361 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 08:24:06,361 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 08:24:06,362 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 08:24:06,362 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 08:24:06,362 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-04 08:24:06,374 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 394 out of 972 [2023-08-04 08:24:06,375 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 63 transitions, 258 flow. Second operand has 5 states, 5 states have (on average 401.0) internal successors, (2005), 5 states have internal predecessors, (2005), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:24:06,375 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 08:24:06,375 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 394 of 972 [2023-08-04 08:24:06,375 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 08:24:09,234 INFO L124 PetriNetUnfolderBase]: 16713/26375 cut-off events. [2023-08-04 08:24:09,234 INFO L125 PetriNetUnfolderBase]: For 4364/4364 co-relation queries the response was YES. [2023-08-04 08:24:09,295 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 173765 event pairs, 9727 based on Foata normal form. 32/26407 useless extension candidates. Maximal degree in co-relation 43949. Up to 23507 conditions per place. [2023-08-04 08:24:09,349 INFO L140 encePairwiseOnDemand]: 968/972 looper letters, 65 selfloop transitions, 3 changer transitions 1/76 dead transitions. [2023-08-04 08:24:09,350 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 76 transitions, 422 flow [2023-08-04 08:24:09,350 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 08:24:09,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 08:24:09,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1641 transitions. [2023-08-04 08:24:09,353 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4220679012345679 [2023-08-04 08:24:09,353 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1641 transitions. [2023-08-04 08:24:09,353 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1641 transitions. [2023-08-04 08:24:09,354 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 08:24:09,354 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1641 transitions. [2023-08-04 08:24:09,355 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 410.25) internal successors, (1641), 4 states have internal predecessors, (1641), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:24:09,358 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 972.0) internal successors, (4860), 5 states have internal predecessors, (4860), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:24:09,358 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 972.0) internal successors, (4860), 5 states have internal predecessors, (4860), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:24:09,358 INFO L175 Difference]: Start difference. First operand has 68 places, 63 transitions, 258 flow. Second operand 4 states and 1641 transitions. [2023-08-04 08:24:09,358 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 76 transitions, 422 flow [2023-08-04 08:24:09,488 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 08:24:09,489 INFO L231 Difference]: Finished difference. Result has 70 places, 63 transitions, 262 flow [2023-08-04 08:24:09,489 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=972, 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 08:24:09,490 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 14 predicate places. [2023-08-04 08:24:09,490 INFO L495 AbstractCegarLoop]: Abstraction has has 70 places, 63 transitions, 262 flow [2023-08-04 08:24:09,490 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 401.0) internal successors, (2005), 5 states have internal predecessors, (2005), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:24:09,490 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 08:24:09,491 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 08:24:09,497 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2023-08-04 08:24:09,695 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 08:24:09,696 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 08:24:09,696 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 08:24:09,696 INFO L85 PathProgramCache]: Analyzing trace with hash 669379971, now seen corresponding path program 1 times [2023-08-04 08:24:09,696 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 08:24:09,696 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [494213339] [2023-08-04 08:24:09,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:24:09,697 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 08:24:09,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:24:09,755 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 08:24:09,756 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 08:24:09,756 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [494213339] [2023-08-04 08:24:09,756 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [494213339] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 08:24:09,756 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1560628556] [2023-08-04 08:24:09,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:24:09,756 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 08:24:09,756 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 08:24:09,757 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 08:24:09,767 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-08-04 08:24:09,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:24:09,895 INFO L262 TraceCheckSpWp]: Trace formula consists of 301 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-04 08:24:09,899 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 08:24:09,915 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 08:24:09,915 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 08:24:09,929 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 08:24:09,929 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1560628556] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 08:24:09,929 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 08:24:09,929 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 5 [2023-08-04 08:24:09,929 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1587342985] [2023-08-04 08:24:09,929 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 08:24:09,930 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 08:24:09,930 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 08:24:09,930 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 08:24:09,930 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-04 08:24:09,941 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 394 out of 972 [2023-08-04 08:24:09,942 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 70 places, 63 transitions, 262 flow. Second operand has 5 states, 5 states have (on average 401.2) internal successors, (2006), 5 states have internal predecessors, (2006), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:24:09,942 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 08:24:09,942 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 394 of 972 [2023-08-04 08:24:09,942 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 08:24:11,775 INFO L124 PetriNetUnfolderBase]: 10381/16595 cut-off events. [2023-08-04 08:24:11,776 INFO L125 PetriNetUnfolderBase]: For 3584/3584 co-relation queries the response was YES. [2023-08-04 08:24:11,806 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 100972 event pairs, 5440 based on Foata normal form. 192/16787 useless extension candidates. Maximal degree in co-relation 32048. Up to 9564 conditions per place. [2023-08-04 08:24:11,843 INFO L140 encePairwiseOnDemand]: 968/972 looper letters, 72 selfloop transitions, 4 changer transitions 0/83 dead transitions. [2023-08-04 08:24:11,844 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 83 transitions, 467 flow [2023-08-04 08:24:11,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 08:24:11,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 08:24:11,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1648 transitions. [2023-08-04 08:24:11,847 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42386831275720166 [2023-08-04 08:24:11,847 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1648 transitions. [2023-08-04 08:24:11,847 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1648 transitions. [2023-08-04 08:24:11,847 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 08:24:11,847 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1648 transitions. [2023-08-04 08:24:11,849 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 412.0) internal successors, (1648), 4 states have internal predecessors, (1648), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:24:11,852 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 972.0) internal successors, (4860), 5 states have internal predecessors, (4860), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:24:11,852 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 972.0) internal successors, (4860), 5 states have internal predecessors, (4860), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:24:11,852 INFO L175 Difference]: Start difference. First operand has 70 places, 63 transitions, 262 flow. Second operand 4 states and 1648 transitions. [2023-08-04 08:24:11,853 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 83 transitions, 467 flow [2023-08-04 08:24:11,928 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 08:24:11,929 INFO L231 Difference]: Finished difference. Result has 72 places, 64 transitions, 272 flow [2023-08-04 08:24:11,929 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=972, 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 08:24:11,930 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 16 predicate places. [2023-08-04 08:24:11,930 INFO L495 AbstractCegarLoop]: Abstraction has has 72 places, 64 transitions, 272 flow [2023-08-04 08:24:11,930 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 401.2) internal successors, (2006), 5 states have internal predecessors, (2006), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:24:11,930 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 08:24:11,930 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 08:24:11,937 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2023-08-04 08:24:12,130 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2023-08-04 08:24:12,131 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 08:24:12,131 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 08:24:12,131 INFO L85 PathProgramCache]: Analyzing trace with hash 1455721591, now seen corresponding path program 1 times [2023-08-04 08:24:12,131 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 08:24:12,132 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [662692241] [2023-08-04 08:24:12,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:24:12,132 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 08:24:12,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:24:12,217 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 08:24:12,217 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 08:24:12,217 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [662692241] [2023-08-04 08:24:12,217 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [662692241] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 08:24:12,218 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1767760901] [2023-08-04 08:24:12,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:24:12,218 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 08:24:12,218 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 08:24:12,219 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 08:24:12,222 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-08-04 08:24:12,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:24:12,351 INFO L262 TraceCheckSpWp]: Trace formula consists of 337 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-04 08:24:12,352 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 08:24:12,362 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 08:24:12,362 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 08:24:12,375 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 08:24:12,375 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1767760901] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 08:24:12,375 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 08:24:12,375 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 5 [2023-08-04 08:24:12,375 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [456648697] [2023-08-04 08:24:12,376 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 08:24:12,376 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 08:24:12,376 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 08:24:12,376 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 08:24:12,377 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-04 08:24:12,390 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 394 out of 972 [2023-08-04 08:24:12,392 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 64 transitions, 272 flow. Second operand has 5 states, 5 states have (on average 401.6) internal successors, (2008), 5 states have internal predecessors, (2008), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:24:12,392 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 08:24:12,392 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 394 of 972 [2023-08-04 08:24:12,392 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 08:24:13,750 INFO L124 PetriNetUnfolderBase]: 9421/14944 cut-off events. [2023-08-04 08:24:13,751 INFO L125 PetriNetUnfolderBase]: For 6527/6527 co-relation queries the response was YES. [2023-08-04 08:24:13,890 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 88254 event pairs, 5948 based on Foata normal form. 233/15177 useless extension candidates. Maximal degree in co-relation 34698. Up to 8751 conditions per place. [2023-08-04 08:24:13,916 INFO L140 encePairwiseOnDemand]: 968/972 looper letters, 73 selfloop transitions, 4 changer transitions 0/84 dead transitions. [2023-08-04 08:24:13,916 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 84 transitions, 478 flow [2023-08-04 08:24:13,916 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 08:24:13,916 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 08:24:13,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1648 transitions. [2023-08-04 08:24:13,918 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42386831275720166 [2023-08-04 08:24:13,918 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1648 transitions. [2023-08-04 08:24:13,918 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1648 transitions. [2023-08-04 08:24:13,919 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 08:24:13,919 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1648 transitions. [2023-08-04 08:24:13,921 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 412.0) internal successors, (1648), 4 states have internal predecessors, (1648), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:24:13,923 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 972.0) internal successors, (4860), 5 states have internal predecessors, (4860), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:24:13,923 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 972.0) internal successors, (4860), 5 states have internal predecessors, (4860), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:24:13,923 INFO L175 Difference]: Start difference. First operand has 72 places, 64 transitions, 272 flow. Second operand 4 states and 1648 transitions. [2023-08-04 08:24:13,923 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 84 transitions, 478 flow [2023-08-04 08:24:13,973 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 08:24:13,975 INFO L231 Difference]: Finished difference. Result has 76 places, 65 transitions, 288 flow [2023-08-04 08:24:13,975 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=972, 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 08:24:13,975 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 20 predicate places. [2023-08-04 08:24:13,975 INFO L495 AbstractCegarLoop]: Abstraction has has 76 places, 65 transitions, 288 flow [2023-08-04 08:24:13,975 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 401.6) internal successors, (2008), 5 states have internal predecessors, (2008), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:24:13,975 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 08:24:13,976 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 08:24:13,980 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2023-08-04 08:24:14,176 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 08:24:14,177 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 08:24:14,177 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 08:24:14,177 INFO L85 PathProgramCache]: Analyzing trace with hash 552009305, now seen corresponding path program 1 times [2023-08-04 08:24:14,177 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 08:24:14,177 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1749660540] [2023-08-04 08:24:14,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:24:14,177 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 08:24:14,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:24:14,245 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 08:24:14,246 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 08:24:14,246 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1749660540] [2023-08-04 08:24:14,246 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1749660540] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 08:24:14,246 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1268519396] [2023-08-04 08:24:14,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:24:14,246 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 08:24:14,246 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 08:24:14,247 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 08:24:14,276 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2023-08-04 08:24:14,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:24:14,394 INFO L262 TraceCheckSpWp]: Trace formula consists of 373 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-04 08:24:14,395 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 08:24:14,407 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 08:24:14,407 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 08:24:14,422 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 08:24:14,422 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1268519396] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 08:24:14,422 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 08:24:14,422 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 5 [2023-08-04 08:24:14,422 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [512746361] [2023-08-04 08:24:14,422 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 08:24:14,423 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 08:24:14,423 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 08:24:14,423 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 08:24:14,423 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-04 08:24:14,433 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 394 out of 972 [2023-08-04 08:24:14,434 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 65 transitions, 288 flow. Second operand has 5 states, 5 states have (on average 402.0) internal successors, (2010), 5 states have internal predecessors, (2010), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:24:14,434 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 08:24:14,434 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 394 of 972 [2023-08-04 08:24:14,434 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 08:24:15,761 INFO L124 PetriNetUnfolderBase]: 9409/14897 cut-off events. [2023-08-04 08:24:15,762 INFO L125 PetriNetUnfolderBase]: For 7481/7481 co-relation queries the response was YES. [2023-08-04 08:24:15,793 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 87887 event pairs, 8414 based on Foata normal form. 13/14910 useless extension candidates. Maximal degree in co-relation 36338. Up to 13454 conditions per place. [2023-08-04 08:24:15,813 INFO L140 encePairwiseOnDemand]: 968/972 looper letters, 72 selfloop transitions, 3 changer transitions 3/85 dead transitions. [2023-08-04 08:24:15,814 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 85 transitions, 496 flow [2023-08-04 08:24:15,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 08:24:15,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 08:24:15,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1648 transitions. [2023-08-04 08:24:15,816 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42386831275720166 [2023-08-04 08:24:15,816 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1648 transitions. [2023-08-04 08:24:15,816 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1648 transitions. [2023-08-04 08:24:15,817 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 08:24:15,817 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1648 transitions. [2023-08-04 08:24:15,819 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 412.0) internal successors, (1648), 4 states have internal predecessors, (1648), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:24:15,821 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 972.0) internal successors, (4860), 5 states have internal predecessors, (4860), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:24:15,821 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 972.0) internal successors, (4860), 5 states have internal predecessors, (4860), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:24:15,821 INFO L175 Difference]: Start difference. First operand has 76 places, 65 transitions, 288 flow. Second operand 4 states and 1648 transitions. [2023-08-04 08:24:15,821 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 85 transitions, 496 flow [2023-08-04 08:24:15,948 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 08:24:15,949 INFO L231 Difference]: Finished difference. Result has 80 places, 63 transitions, 286 flow [2023-08-04 08:24:15,949 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=972, 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 08:24:15,949 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 24 predicate places. [2023-08-04 08:24:15,949 INFO L495 AbstractCegarLoop]: Abstraction has has 80 places, 63 transitions, 286 flow [2023-08-04 08:24:15,950 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 402.0) internal successors, (2010), 5 states have internal predecessors, (2010), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:24:15,950 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 08:24:15,950 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 08:24:15,954 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2023-08-04 08:24:16,150 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 08:24:16,150 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 08:24:16,151 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 08:24:16,151 INFO L85 PathProgramCache]: Analyzing trace with hash 1810071531, now seen corresponding path program 1 times [2023-08-04 08:24:16,151 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 08:24:16,151 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [424874295] [2023-08-04 08:24:16,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:24:16,151 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 08:24:16,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:24:18,714 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 08:24:18,714 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 08:24:18,714 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [424874295] [2023-08-04 08:24:18,714 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [424874295] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 08:24:18,714 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2070976456] [2023-08-04 08:24:18,714 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:24:18,714 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 08:24:18,715 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 08:24:18,716 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 08:24:18,720 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2023-08-04 08:24:18,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:24:18,873 INFO L262 TraceCheckSpWp]: Trace formula consists of 409 conjuncts, 58 conjunts are in the unsatisfiable core [2023-08-04 08:24:18,876 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 08:24:26,744 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 08:24:26,745 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 08:24:28,708 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 08:24:28,708 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2070976456] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 08:24:28,708 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 08:24:28,709 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 10 [2023-08-04 08:24:28,709 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [116172182] [2023-08-04 08:24:28,709 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 08:24:28,709 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-08-04 08:24:28,709 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 08:24:28,710 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-08-04 08:24:28,710 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2023-08-04 08:24:28,968 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 372 out of 972 [2023-08-04 08:24:28,970 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 80 places, 63 transitions, 286 flow. Second operand has 10 states, 10 states have (on average 379.0) internal successors, (3790), 10 states have internal predecessors, (3790), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:24:28,970 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 08:24:28,970 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 372 of 972 [2023-08-04 08:24:28,970 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 08:24:32,878 INFO L124 PetriNetUnfolderBase]: 15094/24034 cut-off events. [2023-08-04 08:24:32,878 INFO L125 PetriNetUnfolderBase]: For 16475/16475 co-relation queries the response was YES. [2023-08-04 08:24:32,934 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60043 conditions, 24034 events. 15094/24034 cut-off events. For 16475/16475 co-relation queries the response was YES. Maximal size of possible extension queue 684. Compared 162942 event pairs, 1396 based on Foata normal form. 2/23893 useless extension candidates. Maximal degree in co-relation 59930. Up to 6570 conditions per place. [2023-08-04 08:24:32,962 INFO L140 encePairwiseOnDemand]: 963/972 looper letters, 160 selfloop transitions, 13 changer transitions 93/273 dead transitions. [2023-08-04 08:24:32,962 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 89 places, 273 transitions, 1819 flow [2023-08-04 08:24:32,962 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-08-04 08:24:32,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-08-04 08:24:32,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 3959 transitions. [2023-08-04 08:24:32,968 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4073045267489712 [2023-08-04 08:24:32,968 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 3959 transitions. [2023-08-04 08:24:32,968 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 3959 transitions. [2023-08-04 08:24:32,969 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 08:24:32,969 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 3959 transitions. [2023-08-04 08:24:32,973 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 395.9) internal successors, (3959), 10 states have internal predecessors, (3959), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:24:32,977 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 972.0) internal successors, (10692), 11 states have internal predecessors, (10692), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:24:32,978 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 972.0) internal successors, (10692), 11 states have internal predecessors, (10692), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:24:32,978 INFO L175 Difference]: Start difference. First operand has 80 places, 63 transitions, 286 flow. Second operand 10 states and 3959 transitions. [2023-08-04 08:24:32,978 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 89 places, 273 transitions, 1819 flow [2023-08-04 08:24:33,249 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 08:24:33,251 INFO L231 Difference]: Finished difference. Result has 94 places, 75 transitions, 400 flow [2023-08-04 08:24:33,251 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=972, 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 08:24:33,252 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 38 predicate places. [2023-08-04 08:24:33,252 INFO L495 AbstractCegarLoop]: Abstraction has has 94 places, 75 transitions, 400 flow [2023-08-04 08:24:33,252 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 379.0) internal successors, (3790), 10 states have internal predecessors, (3790), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:24:33,252 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 08:24:33,253 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 08:24:33,257 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2023-08-04 08:24:33,453 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 08:24:33,453 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 08:24:33,453 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 08:24:33,453 INFO L85 PathProgramCache]: Analyzing trace with hash -637450587, now seen corresponding path program 2 times [2023-08-04 08:24:33,453 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 08:24:33,454 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [173085329] [2023-08-04 08:24:33,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:24:33,454 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 08:24:33,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:24:35,471 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 08:24:35,471 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 08:24:35,471 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [173085329] [2023-08-04 08:24:35,471 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [173085329] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 08:24:35,472 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [363748212] [2023-08-04 08:24:35,472 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-04 08:24:35,472 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 08:24:35,472 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 08:24:35,473 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 08:24:35,478 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2023-08-04 08:24:35,643 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-04 08:24:35,643 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-04 08:24:35,646 INFO L262 TraceCheckSpWp]: Trace formula consists of 409 conjuncts, 58 conjunts are in the unsatisfiable core [2023-08-04 08:24:35,648 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 08:24:39,560 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 08:24:39,560 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 08:24:40,779 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 08:24:40,779 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [363748212] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 08:24:40,779 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 08:24:40,779 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 10 [2023-08-04 08:24:40,780 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [153508189] [2023-08-04 08:24:40,780 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 08:24:40,780 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-08-04 08:24:40,781 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 08:24:40,781 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-08-04 08:24:40,781 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2023-08-04 08:24:41,040 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 372 out of 972 [2023-08-04 08:24:41,042 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 94 places, 75 transitions, 400 flow. Second operand has 10 states, 10 states have (on average 378.9) internal successors, (3789), 10 states have internal predecessors, (3789), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:24:41,042 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 08:24:41,042 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 372 of 972 [2023-08-04 08:24:41,042 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 08:24:45,098 INFO L124 PetriNetUnfolderBase]: 15274/25592 cut-off events. [2023-08-04 08:24:45,098 INFO L125 PetriNetUnfolderBase]: For 77392/77392 co-relation queries the response was YES. [2023-08-04 08:24:45,265 INFO L83 FinitePrefix]: Finished finitePrefix Result has 97773 conditions, 25592 events. 15274/25592 cut-off events. For 77392/77392 co-relation queries the response was YES. Maximal size of possible extension queue 788. Compared 189165 event pairs, 2399 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 08:24:45,314 INFO L140 encePairwiseOnDemand]: 963/972 looper letters, 136 selfloop transitions, 9 changer transitions 74/226 dead transitions. [2023-08-04 08:24:45,315 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 97 places, 226 transitions, 1667 flow [2023-08-04 08:24:45,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-08-04 08:24:45,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-08-04 08:24:45,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 3170 transitions. [2023-08-04 08:24:45,319 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40766460905349794 [2023-08-04 08:24:45,319 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 3170 transitions. [2023-08-04 08:24:45,319 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 3170 transitions. [2023-08-04 08:24:45,320 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 08:24:45,320 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 3170 transitions. [2023-08-04 08:24:45,323 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 396.25) internal successors, (3170), 8 states have internal predecessors, (3170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:24:45,327 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 972.0) internal successors, (8748), 9 states have internal predecessors, (8748), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:24:45,328 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 972.0) internal successors, (8748), 9 states have internal predecessors, (8748), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:24:45,328 INFO L175 Difference]: Start difference. First operand has 94 places, 75 transitions, 400 flow. Second operand 8 states and 3170 transitions. [2023-08-04 08:24:45,328 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 97 places, 226 transitions, 1667 flow [2023-08-04 08:24:45,845 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 08:24:45,847 INFO L231 Difference]: Finished difference. Result has 99 places, 73 transitions, 428 flow [2023-08-04 08:24:45,847 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=972, 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 08:24:45,847 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 43 predicate places. [2023-08-04 08:24:45,847 INFO L495 AbstractCegarLoop]: Abstraction has has 99 places, 73 transitions, 428 flow [2023-08-04 08:24:45,848 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 378.9) internal successors, (3789), 10 states have internal predecessors, (3789), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:24:45,848 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 08:24:45,848 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 08:24:45,852 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2023-08-04 08:24:46,049 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 08:24:46,049 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 08:24:46,049 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 08:24:46,049 INFO L85 PathProgramCache]: Analyzing trace with hash -224247549, now seen corresponding path program 1 times [2023-08-04 08:24:46,050 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 08:24:46,050 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1982434000] [2023-08-04 08:24:46,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:24:46,050 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 08:24:46,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:24:47,378 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 5 proven. 15 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2023-08-04 08:24:47,378 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 08:24:47,378 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1982434000] [2023-08-04 08:24:47,379 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1982434000] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 08:24:47,379 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [667785510] [2023-08-04 08:24:47,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:24:47,379 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 08:24:47,379 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 08:24:47,381 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 08:24:47,409 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2023-08-04 08:24:47,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:24:47,554 INFO L262 TraceCheckSpWp]: Trace formula consists of 409 conjuncts, 58 conjunts are in the unsatisfiable core [2023-08-04 08:24:47,556 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 08:24:54,822 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 08:24:54,822 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 08:24:56,551 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 08:24:56,551 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [667785510] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 08:24:56,551 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 08:24:56,551 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 6, 6] total 25 [2023-08-04 08:24:56,551 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1537213652] [2023-08-04 08:24:56,551 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 08:24:56,551 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-08-04 08:24:56,552 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 08:24:56,552 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-08-04 08:24:56,552 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=522, Unknown=0, NotChecked=0, Total=600 [2023-08-04 08:24:58,254 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 350 out of 972 [2023-08-04 08:24:58,257 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 99 places, 73 transitions, 428 flow. Second operand has 25 states, 25 states have (on average 354.8) internal successors, (8870), 25 states have internal predecessors, (8870), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:24:58,257 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 08:24:58,257 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 350 of 972 [2023-08-04 08:24:58,257 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 08:25:12,539 INFO L124 PetriNetUnfolderBase]: 20979/36959 cut-off events. [2023-08-04 08:25:12,539 INFO L125 PetriNetUnfolderBase]: For 166174/166174 co-relation queries the response was YES. [2023-08-04 08:25:12,810 INFO L83 FinitePrefix]: Finished finitePrefix Result has 152652 conditions, 36959 events. 20979/36959 cut-off events. For 166174/166174 co-relation queries the response was YES. Maximal size of possible extension queue 1454. Compared 308454 event pairs, 2039 based on Foata normal form. 9/36900 useless extension candidates. Maximal degree in co-relation 152611. Up to 12854 conditions per place. [2023-08-04 08:25:12,873 INFO L140 encePairwiseOnDemand]: 946/972 looper letters, 330 selfloop transitions, 138 changer transitions 60/532 dead transitions. [2023-08-04 08:25:12,873 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 132 places, 532 transitions, 4446 flow [2023-08-04 08:25:12,874 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2023-08-04 08:25:12,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2023-08-04 08:25:12,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 13741 transitions. [2023-08-04 08:25:12,888 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3720218756768464 [2023-08-04 08:25:12,888 INFO L72 ComplementDD]: Start complementDD. Operand 38 states and 13741 transitions. [2023-08-04 08:25:12,888 INFO L73 IsDeterministic]: Start isDeterministic. Operand 38 states and 13741 transitions. [2023-08-04 08:25:12,895 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 08:25:12,895 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 38 states and 13741 transitions. [2023-08-04 08:25:12,910 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 39 states, 38 states have (on average 361.60526315789474) internal successors, (13741), 38 states have internal predecessors, (13741), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:25:12,936 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 39 states, 39 states have (on average 972.0) internal successors, (37908), 39 states have internal predecessors, (37908), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:25:12,941 INFO L81 ComplementDD]: Finished complementDD. Result has 39 states, 39 states have (on average 972.0) internal successors, (37908), 39 states have internal predecessors, (37908), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:25:12,942 INFO L175 Difference]: Start difference. First operand has 99 places, 73 transitions, 428 flow. Second operand 38 states and 13741 transitions. [2023-08-04 08:25:12,942 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 132 places, 532 transitions, 4446 flow [2023-08-04 08:25:14,028 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 127 places, 532 transitions, 4134 flow, removed 133 selfloop flow, removed 5 redundant places. [2023-08-04 08:25:14,033 INFO L231 Difference]: Finished difference. Result has 150 places, 225 transitions, 2118 flow [2023-08-04 08:25:14,033 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=972, PETRI_DIFFERENCE_MINUEND_FLOW=396, PETRI_DIFFERENCE_MINUEND_PLACES=90, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=73, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=38, PETRI_FLOW=2118, PETRI_PLACES=150, PETRI_TRANSITIONS=225} [2023-08-04 08:25:14,034 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 94 predicate places. [2023-08-04 08:25:14,034 INFO L495 AbstractCegarLoop]: Abstraction has has 150 places, 225 transitions, 2118 flow [2023-08-04 08:25:14,035 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 354.8) internal successors, (8870), 25 states have internal predecessors, (8870), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:25:14,035 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 08:25:14,035 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 08:25:14,040 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2023-08-04 08:25:14,239 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,SelfDestructingSolverStorable22 [2023-08-04 08:25:14,240 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 08:25:14,240 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 08:25:14,240 INFO L85 PathProgramCache]: Analyzing trace with hash -569979435, now seen corresponding path program 1 times [2023-08-04 08:25:14,240 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 08:25:14,240 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [955051908] [2023-08-04 08:25:14,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:25:14,240 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 08:25:14,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:25:15,560 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 2 proven. 17 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2023-08-04 08:25:15,560 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 08:25:15,560 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [955051908] [2023-08-04 08:25:15,561 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [955051908] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 08:25:15,561 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1048828581] [2023-08-04 08:25:15,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:25:15,561 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 08:25:15,561 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 08:25:15,565 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 08:25:15,572 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2023-08-04 08:25:15,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:25:15,738 INFO L262 TraceCheckSpWp]: Trace formula consists of 409 conjuncts, 86 conjunts are in the unsatisfiable core [2023-08-04 08:25:15,741 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 08:25:20,310 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2023-08-04 08:25:20,310 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 08:25:21,971 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2023-08-04 08:25:21,971 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1048828581] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 08:25:21,971 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 08:25:21,971 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 6, 7] total 21 [2023-08-04 08:25:21,971 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [750703173] [2023-08-04 08:25:21,971 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 08:25:21,971 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-08-04 08:25:21,972 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 08:25:21,972 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-08-04 08:25:21,972 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=370, Unknown=0, NotChecked=0, Total=420 [2023-08-04 08:25:23,578 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 349 out of 972 [2023-08-04 08:25:23,581 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 150 places, 225 transitions, 2118 flow. Second operand has 21 states, 21 states have (on average 354.4761904761905) internal successors, (7444), 21 states have internal predecessors, (7444), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:25:23,582 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 08:25:23,582 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 349 of 972 [2023-08-04 08:25:23,582 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 08:25:36,194 INFO L124 PetriNetUnfolderBase]: 22530/40313 cut-off events. [2023-08-04 08:25:36,194 INFO L125 PetriNetUnfolderBase]: For 276038/276038 co-relation queries the response was YES. [2023-08-04 08:25:36,592 INFO L83 FinitePrefix]: Finished finitePrefix Result has 206729 conditions, 40313 events. 22530/40313 cut-off events. For 276038/276038 co-relation queries the response was YES. Maximal size of possible extension queue 1629. Compared 345642 event pairs, 2599 based on Foata normal form. 123/40432 useless extension candidates. Maximal degree in co-relation 206668. Up to 20847 conditions per place. [2023-08-04 08:25:36,790 INFO L140 encePairwiseOnDemand]: 953/972 looper letters, 179 selfloop transitions, 78 changer transitions 289/554 dead transitions. [2023-08-04 08:25:36,790 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 179 places, 554 transitions, 5901 flow [2023-08-04 08:25:36,791 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2023-08-04 08:25:36,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2023-08-04 08:25:36,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 11107 transitions. [2023-08-04 08:25:36,802 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36861144298420284 [2023-08-04 08:25:36,802 INFO L72 ComplementDD]: Start complementDD. Operand 31 states and 11107 transitions. [2023-08-04 08:25:36,802 INFO L73 IsDeterministic]: Start isDeterministic. Operand 31 states and 11107 transitions. [2023-08-04 08:25:36,805 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 08:25:36,805 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 31 states and 11107 transitions. [2023-08-04 08:25:36,816 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 32 states, 31 states have (on average 358.2903225806452) internal successors, (11107), 31 states have internal predecessors, (11107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:25:36,833 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 32 states, 32 states have (on average 972.0) internal successors, (31104), 32 states have internal predecessors, (31104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:25:36,837 INFO L81 ComplementDD]: Finished complementDD. Result has 32 states, 32 states have (on average 972.0) internal successors, (31104), 32 states have internal predecessors, (31104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:25:36,837 INFO L175 Difference]: Start difference. First operand has 150 places, 225 transitions, 2118 flow. Second operand 31 states and 11107 transitions. [2023-08-04 08:25:36,837 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 179 places, 554 transitions, 5901 flow [2023-08-04 08:25:42,127 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 170 places, 554 transitions, 5326 flow, removed 259 selfloop flow, removed 9 redundant places. [2023-08-04 08:25:42,131 INFO L231 Difference]: Finished difference. Result has 178 places, 160 transitions, 1462 flow [2023-08-04 08:25:42,132 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=972, PETRI_DIFFERENCE_MINUEND_FLOW=1826, PETRI_DIFFERENCE_MINUEND_PLACES=140, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=225, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=186, PETRI_DIFFERENCE_SUBTRAHEND_STATES=31, PETRI_FLOW=1462, PETRI_PLACES=178, PETRI_TRANSITIONS=160} [2023-08-04 08:25:42,132 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 122 predicate places. [2023-08-04 08:25:42,132 INFO L495 AbstractCegarLoop]: Abstraction has has 178 places, 160 transitions, 1462 flow [2023-08-04 08:25:42,133 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 354.4761904761905) internal successors, (7444), 21 states have internal predecessors, (7444), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:25:42,134 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 08:25:42,134 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 08:25:42,139 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2023-08-04 08:25:42,334 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2023-08-04 08:25:42,334 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 08:25:42,335 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 08:25:42,335 INFO L85 PathProgramCache]: Analyzing trace with hash -1590767861, now seen corresponding path program 1 times [2023-08-04 08:25:42,335 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 08:25:42,335 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1997400931] [2023-08-04 08:25:42,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:25:42,335 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 08:25:42,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:25:43,211 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 08:25:43,212 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 08:25:43,212 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1997400931] [2023-08-04 08:25:43,212 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1997400931] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 08:25:43,212 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1861542955] [2023-08-04 08:25:43,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:25:43,212 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 08:25:43,212 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 08:25:43,217 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 08:25:43,220 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2023-08-04 08:25:43,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:25:43,390 INFO L262 TraceCheckSpWp]: Trace formula consists of 409 conjuncts, 58 conjunts are in the unsatisfiable core [2023-08-04 08:25:43,393 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 08:25:47,559 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 08:25:47,559 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 08:25:48,799 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 08:25:48,799 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1861542955] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 08:25:48,799 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 08:25:48,799 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 6, 6] total 21 [2023-08-04 08:25:48,799 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [267293580] [2023-08-04 08:25:48,799 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 08:25:48,799 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-08-04 08:25:48,800 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 08:25:48,800 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-08-04 08:25:48,800 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=370, Unknown=0, NotChecked=0, Total=420 [2023-08-04 08:25:50,482 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 350 out of 972 [2023-08-04 08:25:50,485 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 178 places, 160 transitions, 1462 flow. Second operand has 21 states, 21 states have (on average 355.4761904761905) internal successors, (7465), 21 states have internal predecessors, (7465), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:25:50,485 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 08:25:50,485 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 350 of 972 [2023-08-04 08:25:50,485 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 08:25:59,476 INFO L124 PetriNetUnfolderBase]: 9020/17732 cut-off events. [2023-08-04 08:25:59,476 INFO L125 PetriNetUnfolderBase]: For 126877/126877 co-relation queries the response was YES. [2023-08-04 08:25:59,595 INFO L83 FinitePrefix]: Finished finitePrefix Result has 95937 conditions, 17732 events. 9020/17732 cut-off events. For 126877/126877 co-relation queries the response was YES. Maximal size of possible extension queue 802. Compared 149193 event pairs, 838 based on Foata normal form. 64/17794 useless extension candidates. Maximal degree in co-relation 95877. Up to 7174 conditions per place. [2023-08-04 08:25:59,619 INFO L140 encePairwiseOnDemand]: 952/972 looper letters, 165 selfloop transitions, 101 changer transitions 48/323 dead transitions. [2023-08-04 08:25:59,620 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 175 places, 323 transitions, 3455 flow [2023-08-04 08:25:59,620 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2023-08-04 08:25:59,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2023-08-04 08:25:59,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 9300 transitions. [2023-08-04 08:25:59,626 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36799620132953464 [2023-08-04 08:25:59,626 INFO L72 ComplementDD]: Start complementDD. Operand 26 states and 9300 transitions. [2023-08-04 08:25:59,626 INFO L73 IsDeterministic]: Start isDeterministic. Operand 26 states and 9300 transitions. [2023-08-04 08:25:59,628 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 08:25:59,629 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 26 states and 9300 transitions. [2023-08-04 08:25:59,638 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 27 states, 26 states have (on average 357.6923076923077) internal successors, (9300), 26 states have internal predecessors, (9300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:25:59,653 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 27 states, 27 states have (on average 972.0) internal successors, (26244), 27 states have internal predecessors, (26244), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:25:59,656 INFO L81 ComplementDD]: Finished complementDD. Result has 27 states, 27 states have (on average 972.0) internal successors, (26244), 27 states have internal predecessors, (26244), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:25:59,656 INFO L175 Difference]: Start difference. First operand has 178 places, 160 transitions, 1462 flow. Second operand 26 states and 9300 transitions. [2023-08-04 08:25:59,656 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 175 places, 323 transitions, 3455 flow [2023-08-04 08:26:00,860 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 145 places, 323 transitions, 3230 flow, removed 84 selfloop flow, removed 30 redundant places. [2023-08-04 08:26:00,864 INFO L231 Difference]: Finished difference. Result has 158 places, 182 transitions, 1960 flow [2023-08-04 08:26:00,864 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=972, PETRI_DIFFERENCE_MINUEND_FLOW=1350, PETRI_DIFFERENCE_MINUEND_PLACES=120, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=160, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=79, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=26, PETRI_FLOW=1960, PETRI_PLACES=158, PETRI_TRANSITIONS=182} [2023-08-04 08:26:00,864 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 102 predicate places. [2023-08-04 08:26:00,864 INFO L495 AbstractCegarLoop]: Abstraction has has 158 places, 182 transitions, 1960 flow [2023-08-04 08:26:00,865 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 355.4761904761905) internal successors, (7465), 21 states have internal predecessors, (7465), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:26:00,865 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 08:26:00,865 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 08:26:00,870 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2023-08-04 08:26:01,065 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 08:26:01,066 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 08:26:01,066 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 08:26:01,066 INFO L85 PathProgramCache]: Analyzing trace with hash -1285751133, now seen corresponding path program 1 times [2023-08-04 08:26:01,066 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 08:26:01,066 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [761325211] [2023-08-04 08:26:01,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:26:01,067 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 08:26:01,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:26:01,721 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 7 proven. 12 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2023-08-04 08:26:01,721 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 08:26:01,721 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [761325211] [2023-08-04 08:26:01,721 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [761325211] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 08:26:01,721 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1936969020] [2023-08-04 08:26:01,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:26:01,722 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 08:26:01,722 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 08:26:01,725 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 08:26:01,756 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2023-08-04 08:26:01,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:26:01,909 INFO L262 TraceCheckSpWp]: Trace formula consists of 409 conjuncts, 72 conjunts are in the unsatisfiable core [2023-08-04 08:26:01,912 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 08:26:05,363 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 08:26:05,363 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 08:26:07,307 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 08:26:07,307 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1936969020] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 08:26:07,307 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 08:26:07,307 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 6, 7] total 22 [2023-08-04 08:26:07,307 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [294560493] [2023-08-04 08:26:07,308 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 08:26:07,308 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-08-04 08:26:07,308 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 08:26:07,308 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-08-04 08:26:07,309 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=402, Unknown=0, NotChecked=0, Total=462 [2023-08-04 08:26:08,463 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 353 out of 972 [2023-08-04 08:26:08,466 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 158 places, 182 transitions, 1960 flow. Second operand has 22 states, 22 states have (on average 358.3181818181818) internal successors, (7883), 22 states have internal predecessors, (7883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:26:08,466 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 08:26:08,467 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 353 of 972 [2023-08-04 08:26:08,467 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 08:26:16,785 INFO L124 PetriNetUnfolderBase]: 7993/16490 cut-off events. [2023-08-04 08:26:16,785 INFO L125 PetriNetUnfolderBase]: For 156058/156404 co-relation queries the response was YES. [2023-08-04 08:26:16,898 INFO L83 FinitePrefix]: Finished finitePrefix Result has 93237 conditions, 16490 events. 7993/16490 cut-off events. For 156058/156404 co-relation queries the response was YES. Maximal size of possible extension queue 777. Compared 145267 event pairs, 788 based on Foata normal form. 117/16543 useless extension candidates. Maximal degree in co-relation 93193. Up to 6569 conditions per place. [2023-08-04 08:26:16,915 INFO L140 encePairwiseOnDemand]: 950/972 looper letters, 0 selfloop transitions, 0 changer transitions 361/361 dead transitions. [2023-08-04 08:26:16,915 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 180 places, 361 transitions, 4559 flow [2023-08-04 08:26:16,915 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2023-08-04 08:26:16,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2023-08-04 08:26:16,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 10077 transitions. [2023-08-04 08:26:16,921 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37026014109347444 [2023-08-04 08:26:16,921 INFO L72 ComplementDD]: Start complementDD. Operand 28 states and 10077 transitions. [2023-08-04 08:26:16,921 INFO L73 IsDeterministic]: Start isDeterministic. Operand 28 states and 10077 transitions. [2023-08-04 08:26:16,923 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 08:26:16,923 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 28 states and 10077 transitions. [2023-08-04 08:26:16,934 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 29 states, 28 states have (on average 359.89285714285717) internal successors, (10077), 28 states have internal predecessors, (10077), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:26:16,951 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 29 states, 29 states have (on average 972.0) internal successors, (28188), 29 states have internal predecessors, (28188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:26:16,954 INFO L81 ComplementDD]: Finished complementDD. Result has 29 states, 29 states have (on average 972.0) internal successors, (28188), 29 states have internal predecessors, (28188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:26:16,954 INFO L175 Difference]: Start difference. First operand has 158 places, 182 transitions, 1960 flow. Second operand 28 states and 10077 transitions. [2023-08-04 08:26:16,954 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 180 places, 361 transitions, 4559 flow [2023-08-04 08:26:17,943 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 166 places, 361 transitions, 4365 flow, removed 61 selfloop flow, removed 14 redundant places. [2023-08-04 08:26:17,945 INFO L231 Difference]: Finished difference. Result has 166 places, 0 transitions, 0 flow [2023-08-04 08:26:17,945 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=972, PETRI_DIFFERENCE_MINUEND_FLOW=1845, PETRI_DIFFERENCE_MINUEND_PLACES=139, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=180, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=180, PETRI_DIFFERENCE_SUBTRAHEND_STATES=28, PETRI_FLOW=0, PETRI_PLACES=166, PETRI_TRANSITIONS=0} [2023-08-04 08:26:17,945 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 110 predicate places. [2023-08-04 08:26:17,945 INFO L495 AbstractCegarLoop]: Abstraction has has 166 places, 0 transitions, 0 flow [2023-08-04 08:26:17,946 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 358.3181818181818) internal successors, (7883), 22 states have internal predecessors, (7883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:26:17,946 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2023-08-04 08:26:17,952 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2023-08-04 08:26:18,147 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 08:26:18,147 INFO L445 BasicCegarLoop]: Path program histogram: [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 08:26:18,148 INFO L307 ceAbstractionStarter]: Result for error location AllErrorsAtOnce was SAFE (1/2) [2023-08-04 08:26:18,151 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 419 places, 456 transitions, 1002 flow [2023-08-04 08:26:19,056 INFO L124 PetriNetUnfolderBase]: 1002/5489 cut-off events. [2023-08-04 08:26:19,057 INFO L125 PetriNetUnfolderBase]: For 602/926 co-relation queries the response was YES. [2023-08-04 08:26:19,215 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6163 conditions, 5489 events. 1002/5489 cut-off events. For 602/926 co-relation queries the response was YES. Maximal size of possible extension queue 154. Compared 48058 event pairs, 26 based on Foata normal form. 0/4611 useless extension candidates. Maximal degree in co-relation 3278. Up to 192 conditions per place. [2023-08-04 08:26:19,215 INFO L82 GeneralOperation]: Start removeDead. Operand has 419 places, 456 transitions, 1002 flow [2023-08-04 08:26:19,264 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 419 places, 456 transitions, 1002 flow [2023-08-04 08:26:19,264 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-04 08:26:19,264 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 419 places, 456 transitions, 1002 flow [2023-08-04 08:26:19,264 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 419 places, 456 transitions, 1002 flow [2023-08-04 08:26:19,264 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 419 places, 456 transitions, 1002 flow [2023-08-04 08:26:20,342 INFO L124 PetriNetUnfolderBase]: 1002/5489 cut-off events. [2023-08-04 08:26:20,342 INFO L125 PetriNetUnfolderBase]: For 602/926 co-relation queries the response was YES. [2023-08-04 08:26:20,419 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6163 conditions, 5489 events. 1002/5489 cut-off events. For 602/926 co-relation queries the response was YES. Maximal size of possible extension queue 154. Compared 48058 event pairs, 26 based on Foata normal form. 0/4611 useless extension candidates. Maximal degree in co-relation 3278. Up to 192 conditions per place. [2023-08-04 08:26:20,605 INFO L119 LiptonReduction]: Number of co-enabled transitions 119004 [2023-08-04 08:26:31,117 INFO L134 LiptonReduction]: Checked pairs total: 136524 [2023-08-04 08:26:31,118 INFO L136 LiptonReduction]: Total number of compositions: 519 [2023-08-04 08:26:31,119 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-04 08:26:31,119 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;@67e45a27, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-04 08:26:31,119 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2023-08-04 08:26:31,126 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-04 08:26:31,126 INFO L124 PetriNetUnfolderBase]: 10/104 cut-off events. [2023-08-04 08:26:31,126 INFO L125 PetriNetUnfolderBase]: For 15/15 co-relation queries the response was YES. [2023-08-04 08:26:31,127 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 08:26:31,127 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1] [2023-08-04 08:26:31,127 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 08:26:31,127 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 08:26:31,127 INFO L85 PathProgramCache]: Analyzing trace with hash -1345931280, now seen corresponding path program 1 times [2023-08-04 08:26:31,127 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 08:26:31,127 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [4888252] [2023-08-04 08:26:31,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:26:31,128 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 08:26:31,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:26:31,160 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-04 08:26:31,161 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 08:26:31,161 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [4888252] [2023-08-04 08:26:31,161 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [4888252] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 08:26:31,161 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [170383814] [2023-08-04 08:26:31,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:26:31,161 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 08:26:31,161 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 08:26:31,165 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 08:26:31,174 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2023-08-04 08:26:31,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:26:31,281 INFO L262 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-04 08:26:31,282 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 08:26:31,294 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 08:26:31,295 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 08:26:31,295 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [170383814] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 08:26:31,295 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 08:26:31,295 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 5 [2023-08-04 08:26:31,296 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1131439906] [2023-08-04 08:26:31,296 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 08:26:31,296 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 08:26:31,296 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 08:26:31,297 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 08:26:31,297 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-08-04 08:26:31,308 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 394 out of 975 [2023-08-04 08:26:31,310 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 62 transitions, 214 flow. Second operand has 5 states, 5 states have (on average 395.6) internal successors, (1978), 5 states have internal predecessors, (1978), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:26:31,310 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 08:26:31,310 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 394 of 975 [2023-08-04 08:26:31,310 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 08:26:33,871 INFO L124 PetriNetUnfolderBase]: 21630/33355 cut-off events. [2023-08-04 08:26:33,871 INFO L125 PetriNetUnfolderBase]: For 6735/6735 co-relation queries the response was YES. [2023-08-04 08:26:33,953 INFO L83 FinitePrefix]: Finished finitePrefix Result has 68954 conditions, 33355 events. 21630/33355 cut-off events. For 6735/6735 co-relation queries the response was YES. Maximal size of possible extension queue 774. Compared 222026 event pairs, 11780 based on Foata normal form. 729/31495 useless extension candidates. Maximal degree in co-relation 27557. Up to 30577 conditions per place. [2023-08-04 08:26:33,978 INFO L140 encePairwiseOnDemand]: 969/975 looper letters, 23 selfloop transitions, 5 changer transitions 33/66 dead transitions. [2023-08-04 08:26:33,978 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 66 transitions, 332 flow [2023-08-04 08:26:33,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-04 08:26:33,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-04 08:26:33,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 2030 transitions. [2023-08-04 08:26:33,980 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4164102564102564 [2023-08-04 08:26:33,980 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 2030 transitions. [2023-08-04 08:26:33,980 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 2030 transitions. [2023-08-04 08:26:33,981 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 08:26:33,981 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 2030 transitions. [2023-08-04 08:26:33,982 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 406.0) internal successors, (2030), 5 states have internal predecessors, (2030), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:26:33,985 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 975.0) internal successors, (5850), 6 states have internal predecessors, (5850), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:26:33,985 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 975.0) internal successors, (5850), 6 states have internal predecessors, (5850), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:26:33,985 INFO L175 Difference]: Start difference. First operand has 56 places, 62 transitions, 214 flow. Second operand 5 states and 2030 transitions. [2023-08-04 08:26:33,985 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 66 transitions, 332 flow [2023-08-04 08:26:33,991 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 08:26:33,992 INFO L231 Difference]: Finished difference. Result has 57 places, 29 transitions, 105 flow [2023-08-04 08:26:33,993 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=975, 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 08:26:33,993 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 1 predicate places. [2023-08-04 08:26:33,993 INFO L495 AbstractCegarLoop]: Abstraction has has 57 places, 29 transitions, 105 flow [2023-08-04 08:26:33,993 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 395.6) internal successors, (1978), 5 states have internal predecessors, (1978), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:26:33,993 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 08:26:33,994 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1] [2023-08-04 08:26:34,001 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2023-08-04 08:26:34,201 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2023-08-04 08:26:34,201 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-04 08:26:34,201 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 08:26:34,201 INFO L85 PathProgramCache]: Analyzing trace with hash 357233228, now seen corresponding path program 1 times [2023-08-04 08:26:34,202 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 08:26:34,202 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [627222247] [2023-08-04 08:26:34,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:26:34,202 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 08:26:34,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:26:34,216 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 08:26:34,216 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 08:26:34,216 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [627222247] [2023-08-04 08:26:34,216 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [627222247] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 08:26:34,216 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 08:26:34,216 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-04 08:26:34,216 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1087424492] [2023-08-04 08:26:34,216 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 08:26:34,217 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 08:26:34,217 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 08:26:34,217 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 08:26:34,217 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-04 08:26:34,226 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 395 out of 975 [2023-08-04 08:26:34,227 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 29 transitions, 105 flow. Second operand has 3 states, 3 states have (on average 397.0) internal successors, (1191), 3 states have internal predecessors, (1191), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:26:34,227 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 08:26:34,227 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 395 of 975 [2023-08-04 08:26:34,227 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 08:26:34,509 INFO L124 PetriNetUnfolderBase]: 1984/3137 cut-off events. [2023-08-04 08:26:34,509 INFO L125 PetriNetUnfolderBase]: For 334/334 co-relation queries the response was YES. [2023-08-04 08:26:34,512 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 100. Compared 15289 event pairs, 1498 based on Foata normal form. 1/3090 useless extension candidates. Maximal degree in co-relation 2832. Up to 2957 conditions per place. [2023-08-04 08:26:34,516 INFO L140 encePairwiseOnDemand]: 972/975 looper letters, 23 selfloop transitions, 2 changer transitions 0/30 dead transitions. [2023-08-04 08:26:34,517 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 30 transitions, 156 flow [2023-08-04 08:26:34,517 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 08:26:34,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 08:26:34,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1210 transitions. [2023-08-04 08:26:34,519 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41367521367521365 [2023-08-04 08:26:34,519 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1210 transitions. [2023-08-04 08:26:34,519 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1210 transitions. [2023-08-04 08:26:34,519 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 08:26:34,519 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1210 transitions. [2023-08-04 08:26:34,520 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 403.3333333333333) internal successors, (1210), 3 states have internal predecessors, (1210), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:26:34,522 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 975.0) internal successors, (3900), 4 states have internal predecessors, (3900), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:26:34,522 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 975.0) internal successors, (3900), 4 states have internal predecessors, (3900), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:26:34,522 INFO L175 Difference]: Start difference. First operand has 57 places, 29 transitions, 105 flow. Second operand 3 states and 1210 transitions. [2023-08-04 08:26:34,522 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 30 transitions, 156 flow [2023-08-04 08:26:34,523 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 08:26:34,524 INFO L231 Difference]: Finished difference. Result has 43 places, 28 transitions, 99 flow [2023-08-04 08:26:34,524 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=975, 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 08:26:34,524 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, -13 predicate places. [2023-08-04 08:26:34,525 INFO L495 AbstractCegarLoop]: Abstraction has has 43 places, 28 transitions, 99 flow [2023-08-04 08:26:34,525 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 397.0) internal successors, (1191), 3 states have internal predecessors, (1191), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:26:34,525 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 08:26:34,525 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 08:26:34,525 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2023-08-04 08:26:34,525 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-04 08:26:34,525 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 08:26:34,526 INFO L85 PathProgramCache]: Analyzing trace with hash 1490034828, now seen corresponding path program 1 times [2023-08-04 08:26:34,526 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 08:26:34,526 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1521439246] [2023-08-04 08:26:34,526 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:26:34,526 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 08:26:34,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:26:34,555 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 08:26:34,555 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 08:26:34,555 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1521439246] [2023-08-04 08:26:34,555 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1521439246] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 08:26:34,555 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1605375994] [2023-08-04 08:26:34,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:26:34,555 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 08:26:34,555 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 08:26:34,556 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 08:26:34,559 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2023-08-04 08:26:34,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:26:34,662 INFO L262 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-04 08:26:34,663 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 08:26:34,670 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 08:26:34,671 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 08:26:34,680 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 08:26:34,680 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1605375994] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 08:26:34,680 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 08:26:34,680 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 4 [2023-08-04 08:26:34,681 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1240000376] [2023-08-04 08:26:34,681 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 08:26:34,681 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 08:26:34,681 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 08:26:34,681 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 08:26:34,681 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-04 08:26:34,692 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 394 out of 975 [2023-08-04 08:26:34,693 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 28 transitions, 99 flow. Second operand has 5 states, 5 states have (on average 396.6) internal successors, (1983), 5 states have internal predecessors, (1983), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:26:34,693 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 08:26:34,693 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 394 of 975 [2023-08-04 08:26:34,693 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 08:26:34,910 INFO L124 PetriNetUnfolderBase]: 1432/2207 cut-off events. [2023-08-04 08:26:34,910 INFO L125 PetriNetUnfolderBase]: For 182/182 co-relation queries the response was YES. [2023-08-04 08:26:34,914 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 9501 event pairs, 784 based on Foata normal form. 2/2173 useless extension candidates. Maximal degree in co-relation 2626. Up to 2073 conditions per place. [2023-08-04 08:26:34,918 INFO L140 encePairwiseOnDemand]: 972/975 looper letters, 23 selfloop transitions, 3 changer transitions 0/31 dead transitions. [2023-08-04 08:26:34,918 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 31 transitions, 156 flow [2023-08-04 08:26:34,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 08:26:34,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 08:26:34,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1603 transitions. [2023-08-04 08:26:34,920 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41102564102564104 [2023-08-04 08:26:34,920 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1603 transitions. [2023-08-04 08:26:34,920 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1603 transitions. [2023-08-04 08:26:34,920 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 08:26:34,920 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1603 transitions. [2023-08-04 08:26:34,921 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 400.75) internal successors, (1603), 4 states have internal predecessors, (1603), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:26:34,923 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 975.0) internal successors, (4875), 5 states have internal predecessors, (4875), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:26:34,923 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 975.0) internal successors, (4875), 5 states have internal predecessors, (4875), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:26:34,923 INFO L175 Difference]: Start difference. First operand has 43 places, 28 transitions, 99 flow. Second operand 4 states and 1603 transitions. [2023-08-04 08:26:34,923 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 31 transitions, 156 flow [2023-08-04 08:26:34,924 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 08:26:34,924 INFO L231 Difference]: Finished difference. Result has 44 places, 27 transitions, 96 flow [2023-08-04 08:26:34,924 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=975, 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 08:26:34,925 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, -12 predicate places. [2023-08-04 08:26:34,925 INFO L495 AbstractCegarLoop]: Abstraction has has 44 places, 27 transitions, 96 flow [2023-08-04 08:26:34,925 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 396.6) internal successors, (1983), 5 states have internal predecessors, (1983), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:26:34,925 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 08:26:34,925 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 08:26:34,930 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Ended with exit code 0 [2023-08-04 08:26:35,129 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2023-08-04 08:26:35,129 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-04 08:26:35,130 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 08:26:35,130 INFO L85 PathProgramCache]: Analyzing trace with hash -1083049877, now seen corresponding path program 1 times [2023-08-04 08:26:35,130 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 08:26:35,130 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1471100901] [2023-08-04 08:26:35,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:26:35,130 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 08:26:35,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:26:35,166 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 08:26:35,166 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 08:26:35,166 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1471100901] [2023-08-04 08:26:35,166 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1471100901] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 08:26:35,166 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1374033413] [2023-08-04 08:26:35,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:26:35,166 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 08:26:35,167 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 08:26:35,168 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 08:26:35,190 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2023-08-04 08:26:35,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:26:35,292 INFO L262 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-04 08:26:35,292 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 08:26:35,305 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 08:26:35,306 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 08:26:35,306 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1374033413] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 08:26:35,306 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 08:26:35,306 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 6 [2023-08-04 08:26:35,307 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1418290114] [2023-08-04 08:26:35,307 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 08:26:35,308 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 08:26:35,308 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 08:26:35,308 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 08:26:35,308 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-08-04 08:26:35,321 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 394 out of 975 [2023-08-04 08:26:35,322 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 27 transitions, 96 flow. Second operand has 5 states, 5 states have (on average 396.6) internal successors, (1983), 5 states have internal predecessors, (1983), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:26:35,322 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 08:26:35,322 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 394 of 975 [2023-08-04 08:26:35,322 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 08:26:35,591 INFO L124 PetriNetUnfolderBase]: 1400/2195 cut-off events. [2023-08-04 08:26:35,591 INFO L125 PetriNetUnfolderBase]: For 154/154 co-relation queries the response was YES. [2023-08-04 08:26:35,595 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 70. Compared 9751 event pairs, 344 based on Foata normal form. 0/2183 useless extension candidates. Maximal degree in co-relation 2583. Up to 1904 conditions per place. [2023-08-04 08:26:35,601 INFO L140 encePairwiseOnDemand]: 971/975 looper letters, 30 selfloop transitions, 5 changer transitions 0/39 dead transitions. [2023-08-04 08:26:35,601 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 39 transitions, 188 flow [2023-08-04 08:26:35,602 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-04 08:26:35,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-04 08:26:35,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 2005 transitions. [2023-08-04 08:26:35,604 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4112820512820513 [2023-08-04 08:26:35,604 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 2005 transitions. [2023-08-04 08:26:35,604 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 2005 transitions. [2023-08-04 08:26:35,604 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 08:26:35,604 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 2005 transitions. [2023-08-04 08:26:35,606 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 401.0) internal successors, (2005), 5 states have internal predecessors, (2005), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:26:35,608 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 975.0) internal successors, (5850), 6 states have internal predecessors, (5850), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:26:35,609 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 975.0) internal successors, (5850), 6 states have internal predecessors, (5850), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:26:35,609 INFO L175 Difference]: Start difference. First operand has 44 places, 27 transitions, 96 flow. Second operand 5 states and 2005 transitions. [2023-08-04 08:26:35,609 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 39 transitions, 188 flow [2023-08-04 08:26:35,609 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 08:26:35,610 INFO L231 Difference]: Finished difference. Result has 44 places, 29 transitions, 108 flow [2023-08-04 08:26:35,610 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=975, 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 08:26:35,612 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, -12 predicate places. [2023-08-04 08:26:35,612 INFO L495 AbstractCegarLoop]: Abstraction has has 44 places, 29 transitions, 108 flow [2023-08-04 08:26:35,612 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 396.6) internal successors, (1983), 5 states have internal predecessors, (1983), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:26:35,612 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 08:26:35,613 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 08:26:35,620 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2023-08-04 08:26:35,817 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 08:26:35,817 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-04 08:26:35,818 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 08:26:35,818 INFO L85 PathProgramCache]: Analyzing trace with hash -1563884959, now seen corresponding path program 1 times [2023-08-04 08:26:35,818 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 08:26:35,818 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1587271225] [2023-08-04 08:26:35,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:26:35,818 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 08:26:35,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:26:35,839 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 08:26:35,840 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 08:26:35,840 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1587271225] [2023-08-04 08:26:35,840 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1587271225] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 08:26:35,840 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 08:26:35,840 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-04 08:26:35,840 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1419953511] [2023-08-04 08:26:35,840 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 08:26:35,841 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 08:26:35,841 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 08:26:35,841 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 08:26:35,841 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-04 08:26:35,848 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 395 out of 975 [2023-08-04 08:26:35,849 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 29 transitions, 108 flow. Second operand has 3 states, 3 states have (on average 398.6666666666667) internal successors, (1196), 3 states have internal predecessors, (1196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:26:35,849 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 08:26:35,849 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 395 of 975 [2023-08-04 08:26:35,849 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 08:26:36,093 INFO L124 PetriNetUnfolderBase]: 1272/1967 cut-off events. [2023-08-04 08:26:36,094 INFO L125 PetriNetUnfolderBase]: For 182/182 co-relation queries the response was YES. [2023-08-04 08:26:36,098 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 67. Compared 8213 event pairs, 992 based on Foata normal form. 4/1971 useless extension candidates. Maximal degree in co-relation 2335. Up to 1801 conditions per place. [2023-08-04 08:26:36,103 INFO L140 encePairwiseOnDemand]: 972/975 looper letters, 26 selfloop transitions, 2 changer transitions 0/32 dead transitions. [2023-08-04 08:26:36,104 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 32 transitions, 169 flow [2023-08-04 08:26:36,104 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 08:26:36,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 08:26:36,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1212 transitions. [2023-08-04 08:26:36,105 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41435897435897434 [2023-08-04 08:26:36,106 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1212 transitions. [2023-08-04 08:26:36,106 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1212 transitions. [2023-08-04 08:26:36,106 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 08:26:36,106 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1212 transitions. [2023-08-04 08:26:36,107 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 404.0) internal successors, (1212), 3 states have internal predecessors, (1212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:26:36,109 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 975.0) internal successors, (3900), 4 states have internal predecessors, (3900), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:26:36,109 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 975.0) internal successors, (3900), 4 states have internal predecessors, (3900), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:26:36,109 INFO L175 Difference]: Start difference. First operand has 44 places, 29 transitions, 108 flow. Second operand 3 states and 1212 transitions. [2023-08-04 08:26:36,109 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 32 transitions, 169 flow [2023-08-04 08:26:36,110 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 08:26:36,110 INFO L231 Difference]: Finished difference. Result has 45 places, 28 transitions, 106 flow [2023-08-04 08:26:36,110 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=975, 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 08:26:36,111 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, -11 predicate places. [2023-08-04 08:26:36,111 INFO L495 AbstractCegarLoop]: Abstraction has has 45 places, 28 transitions, 106 flow [2023-08-04 08:26:36,111 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 398.6666666666667) internal successors, (1196), 3 states have internal predecessors, (1196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:26:36,111 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 08:26:36,111 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 08:26:36,111 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2023-08-04 08:26:36,111 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-04 08:26:36,112 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 08:26:36,112 INFO L85 PathProgramCache]: Analyzing trace with hash 214531911, now seen corresponding path program 1 times [2023-08-04 08:26:36,112 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 08:26:36,112 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1941712431] [2023-08-04 08:26:36,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:26:36,112 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 08:26:36,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:26:36,138 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 08:26:36,138 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 08:26:36,138 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1941712431] [2023-08-04 08:26:36,138 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1941712431] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 08:26:36,139 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [809291961] [2023-08-04 08:26:36,139 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:26:36,139 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 08:26:36,139 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 08:26:36,140 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 08:26:36,142 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2023-08-04 08:26:36,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:26:36,262 INFO L262 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-04 08:26:36,263 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 08:26:36,272 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 08:26:36,272 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 08:26:36,282 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 08:26:36,282 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [809291961] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 08:26:36,282 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 08:26:36,282 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 5 [2023-08-04 08:26:36,283 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1421339228] [2023-08-04 08:26:36,283 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 08:26:36,283 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 08:26:36,283 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 08:26:36,283 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 08:26:36,283 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-04 08:26:36,295 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 394 out of 975 [2023-08-04 08:26:36,296 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 28 transitions, 106 flow. Second operand has 5 states, 5 states have (on average 397.6) internal successors, (1988), 5 states have internal predecessors, (1988), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:26:36,296 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 08:26:36,296 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 394 of 975 [2023-08-04 08:26:36,296 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 08:26:36,495 INFO L124 PetriNetUnfolderBase]: 936/1431 cut-off events. [2023-08-04 08:26:36,496 INFO L125 PetriNetUnfolderBase]: For 158/158 co-relation queries the response was YES. [2023-08-04 08:26:36,499 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 5337 event pairs, 536 based on Foata normal form. 8/1439 useless extension candidates. Maximal degree in co-relation 1701. Up to 1225 conditions per place. [2023-08-04 08:26:36,502 INFO L140 encePairwiseOnDemand]: 972/975 looper letters, 28 selfloop transitions, 3 changer transitions 0/35 dead transitions. [2023-08-04 08:26:36,502 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 35 transitions, 181 flow [2023-08-04 08:26:36,503 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 08:26:36,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 08:26:36,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1607 transitions. [2023-08-04 08:26:36,504 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41205128205128205 [2023-08-04 08:26:36,504 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1607 transitions. [2023-08-04 08:26:36,504 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1607 transitions. [2023-08-04 08:26:36,505 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 08:26:36,505 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1607 transitions. [2023-08-04 08:26:36,506 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 401.75) internal successors, (1607), 4 states have internal predecessors, (1607), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:26:36,508 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 975.0) internal successors, (4875), 5 states have internal predecessors, (4875), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:26:36,508 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 975.0) internal successors, (4875), 5 states have internal predecessors, (4875), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:26:36,509 INFO L175 Difference]: Start difference. First operand has 45 places, 28 transitions, 106 flow. Second operand 4 states and 1607 transitions. [2023-08-04 08:26:36,509 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 35 transitions, 181 flow [2023-08-04 08:26:36,509 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 08:26:36,510 INFO L231 Difference]: Finished difference. Result has 46 places, 27 transitions, 103 flow [2023-08-04 08:26:36,510 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=975, 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 08:26:36,511 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, -10 predicate places. [2023-08-04 08:26:36,511 INFO L495 AbstractCegarLoop]: Abstraction has has 46 places, 27 transitions, 103 flow [2023-08-04 08:26:36,511 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 397.6) internal successors, (1988), 5 states have internal predecessors, (1988), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:26:36,511 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 08:26:36,511 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 08:26:36,519 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2023-08-04 08:26:36,716 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 08:26:36,717 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-04 08:26:36,717 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 08:26:36,717 INFO L85 PathProgramCache]: Analyzing trace with hash 951247564, now seen corresponding path program 1 times [2023-08-04 08:26:36,717 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 08:26:36,718 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2122645946] [2023-08-04 08:26:36,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:26:36,718 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 08:26:36,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:26:36,761 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 08:26:36,761 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 08:26:36,761 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2122645946] [2023-08-04 08:26:36,761 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2122645946] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 08:26:36,761 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1210375879] [2023-08-04 08:26:36,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:26:36,762 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 08:26:36,762 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 08:26:36,763 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 08:26:36,789 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2023-08-04 08:26:36,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:26:36,900 INFO L262 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-04 08:26:36,901 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 08:26:36,914 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 08:26:36,914 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 08:26:36,914 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1210375879] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 08:26:36,914 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 08:26:36,914 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 6 [2023-08-04 08:26:36,915 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [596303568] [2023-08-04 08:26:36,915 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 08:26:36,915 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 08:26:36,915 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 08:26:36,916 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 08:26:36,916 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-08-04 08:26:36,928 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 394 out of 975 [2023-08-04 08:26:36,929 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 27 transitions, 103 flow. Second operand has 5 states, 5 states have (on average 397.6) internal successors, (1988), 5 states have internal predecessors, (1988), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:26:36,929 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 08:26:36,929 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 394 of 975 [2023-08-04 08:26:36,929 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 08:26:37,117 INFO L124 PetriNetUnfolderBase]: 744/1143 cut-off events. [2023-08-04 08:26:37,117 INFO L125 PetriNetUnfolderBase]: For 190/190 co-relation queries the response was YES. [2023-08-04 08:26:37,120 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 3995 event pairs, 104 based on Foata normal form. 64/1207 useless extension candidates. Maximal degree in co-relation 1399. Up to 448 conditions per place. [2023-08-04 08:26:37,121 INFO L140 encePairwiseOnDemand]: 972/975 looper letters, 0 selfloop transitions, 0 changer transitions 43/43 dead transitions. [2023-08-04 08:26:37,121 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 43 transitions, 213 flow [2023-08-04 08:26:37,121 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-04 08:26:37,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-04 08:26:37,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 2009 transitions. [2023-08-04 08:26:37,124 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41210256410256413 [2023-08-04 08:26:37,125 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 2009 transitions. [2023-08-04 08:26:37,125 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 2009 transitions. [2023-08-04 08:26:37,125 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 08:26:37,125 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 2009 transitions. [2023-08-04 08:26:37,127 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 401.8) internal successors, (2009), 5 states have internal predecessors, (2009), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:26:37,129 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 975.0) internal successors, (5850), 6 states have internal predecessors, (5850), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:26:37,130 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 975.0) internal successors, (5850), 6 states have internal predecessors, (5850), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:26:37,131 INFO L175 Difference]: Start difference. First operand has 46 places, 27 transitions, 103 flow. Second operand 5 states and 2009 transitions. [2023-08-04 08:26:37,131 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 49 places, 43 transitions, 213 flow [2023-08-04 08:26:37,132 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 08:26:37,132 INFO L231 Difference]: Finished difference. Result has 45 places, 0 transitions, 0 flow [2023-08-04 08:26:37,132 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=975, 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 08:26:37,133 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, -11 predicate places. [2023-08-04 08:26:37,133 INFO L495 AbstractCegarLoop]: Abstraction has has 45 places, 0 transitions, 0 flow [2023-08-04 08:26:37,134 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 397.6) internal successors, (1988), 5 states have internal predecessors, (1988), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:26:37,134 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (2 of 3 remaining) [2023-08-04 08:26:37,134 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 3 remaining) [2023-08-04 08:26:37,134 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 3 remaining) [2023-08-04 08:26:37,141 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2023-08-04 08:26:37,338 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 08:26:37,339 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1, 1] [2023-08-04 08:26:37,339 INFO L307 ceAbstractionStarter]: Result for error location InUseError was SAFE,SAFE,SAFE (2/2) [2023-08-04 08:26:37,339 INFO L228 ceAbstractionStarter]: Analysis of concurrent program completed with 2 thread instances [2023-08-04 08:26:37,339 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2023-08-04 08:26:37,344 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 04.08 08:26:37 BasicIcfg [2023-08-04 08:26:37,344 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-08-04 08:26:37,344 INFO L158 Benchmark]: Toolchain (without parser) took 215988.48ms. Allocated memory was 339.7MB in the beginning and 12.9GB in the end (delta: 12.6GB). Free memory was 277.3MB in the beginning and 10.3GB in the end (delta: -10.0GB). Peak memory consumption was 2.5GB. Max. memory is 16.0GB. [2023-08-04 08:26:37,344 INFO L158 Benchmark]: CDTParser took 0.11ms. Allocated memory is still 339.7MB. Free memory is still 288.5MB. There was no memory consumed. Max. memory is 16.0GB. [2023-08-04 08:26:37,344 INFO L158 Benchmark]: CACSL2BoogieTranslator took 209.79ms. Allocated memory is still 339.7MB. Free memory was 277.0MB in the beginning and 265.3MB in the end (delta: 11.8MB). Peak memory consumption was 10.5MB. Max. memory is 16.0GB. [2023-08-04 08:26:37,345 INFO L158 Benchmark]: Boogie Procedure Inliner took 36.84ms. Allocated memory is still 339.7MB. Free memory was 265.0MB in the beginning and 262.6MB in the end (delta: 2.4MB). Peak memory consumption was 4.2MB. Max. memory is 16.0GB. [2023-08-04 08:26:37,345 INFO L158 Benchmark]: Boogie Preprocessor took 39.39ms. Allocated memory is still 339.7MB. Free memory was 262.6MB in the beginning and 260.8MB in the end (delta: 1.8MB). There was no memory consumed. Max. memory is 16.0GB. [2023-08-04 08:26:37,345 INFO L158 Benchmark]: RCFGBuilder took 599.13ms. Allocated memory was 339.7MB in the beginning and 559.9MB in the end (delta: 220.2MB). Free memory was 260.5MB in the beginning and 508.5MB in the end (delta: -248.0MB). Peak memory consumption was 11.2MB. Max. memory is 16.0GB. [2023-08-04 08:26:37,345 INFO L158 Benchmark]: TraceAbstraction took 215098.09ms. Allocated memory was 559.9MB in the beginning and 12.9GB in the end (delta: 12.3GB). Free memory was 507.5MB in the beginning and 10.3GB in the end (delta: -9.8GB). Peak memory consumption was 2.6GB. Max. memory is 16.0GB. [2023-08-04 08:26:37,346 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.11ms. Allocated memory is still 339.7MB. Free memory is still 288.5MB. There was no memory consumed. Max. memory is 16.0GB. * CACSL2BoogieTranslator took 209.79ms. Allocated memory is still 339.7MB. Free memory was 277.0MB in the beginning and 265.3MB in the end (delta: 11.8MB). Peak memory consumption was 10.5MB. Max. memory is 16.0GB. * Boogie Procedure Inliner took 36.84ms. Allocated memory is still 339.7MB. Free memory was 265.0MB in the beginning and 262.6MB in the end (delta: 2.4MB). Peak memory consumption was 4.2MB. Max. memory is 16.0GB. * Boogie Preprocessor took 39.39ms. Allocated memory is still 339.7MB. Free memory was 262.6MB in the beginning and 260.8MB in the end (delta: 1.8MB). There was no memory consumed. Max. memory is 16.0GB. * RCFGBuilder took 599.13ms. Allocated memory was 339.7MB in the beginning and 559.9MB in the end (delta: 220.2MB). Free memory was 260.5MB in the beginning and 508.5MB in the end (delta: -248.0MB). Peak memory consumption was 11.2MB. Max. memory is 16.0GB. * TraceAbstraction took 215098.09ms. Allocated memory was 559.9MB in the beginning and 12.9GB in the end (delta: 12.3GB). Free memory was 507.5MB in the beginning and 10.3GB in the end (delta: -9.8GB). Peak memory consumption was 2.6GB. Max. memory is 16.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 8.2s, 281 PlacesBefore, 41 PlacesAfterwards, 303 TransitionsBefore, 44 TransitionsAfterwards, 36660 CoEnabledTransitionPairs, 8 FixpointIterations, 60 TrivialSequentialCompositions, 181 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 65 ConcurrentYvCompositions, 19 ChoiceCompositions, 325 TotalNumberOfCompositions, 38222 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 37602, independent: 37560, independent conditional: 0, independent unconditional: 37560, dependent: 42, dependent conditional: 0, dependent unconditional: 42, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: SyntacticIndependenceRelation.Independence Queries: [ total: 21322, independent: 21309, independent conditional: 0, independent unconditional: 21309, dependent: 13, dependent conditional: 0, dependent unconditional: 13, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Cache Queries: [ total: 37602, independent: 16251, independent conditional: 0, independent unconditional: 16251, dependent: 29, dependent conditional: 0, dependent unconditional: 29, unknown: 21322, unknown conditional: 0, unknown unconditional: 21322] , Statistics on independence cache: Total cache size (in pairs): 89, Positive cache size: 86, Positive conditional cache size: 0, Positive unconditional cache size: 86, 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: 7.5s, 281 PlacesBefore, 41 PlacesAfterwards, 303 TransitionsBefore, 44 TransitionsAfterwards, 36660 CoEnabledTransitionPairs, 8 FixpointIterations, 60 TrivialSequentialCompositions, 182 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 67 ConcurrentYvCompositions, 19 ChoiceCompositions, 328 TotalNumberOfCompositions, 38528 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 37607, independent: 37568, independent conditional: 0, independent unconditional: 37568, dependent: 39, dependent conditional: 0, dependent unconditional: 39, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: SyntacticIndependenceRelation.Independence Queries: [ total: 21416, independent: 21400, independent conditional: 0, independent unconditional: 21400, dependent: 16, dependent conditional: 0, dependent unconditional: 16, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Cache Queries: [ total: 37607, independent: 16168, independent conditional: 0, independent unconditional: 16168, dependent: 23, dependent conditional: 0, dependent unconditional: 23, unknown: 21416, unknown conditional: 0, unknown unconditional: 21416] , Statistics on independence cache: Total cache size (in pairs): 81, Positive cache size: 78, Positive conditional cache size: 0, Positive unconditional cache size: 78, 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: 13.1s, 419 PlacesBefore, 56 PlacesAfterwards, 456 TransitionsBefore, 62 TransitionsAfterwards, 119004 CoEnabledTransitionPairs, 8 FixpointIterations, 60 TrivialSequentialCompositions, 299 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 126 ConcurrentYvCompositions, 31 ChoiceCompositions, 516 TotalNumberOfCompositions, 136689 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 132892, independent: 132818, independent conditional: 0, independent unconditional: 132818, dependent: 74, dependent conditional: 0, dependent unconditional: 74, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: SyntacticIndependenceRelation.Independence Queries: [ total: 71056, independent: 71024, independent conditional: 0, independent unconditional: 71024, dependent: 32, dependent conditional: 0, dependent unconditional: 32, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Cache Queries: [ total: 132892, independent: 61794, independent conditional: 0, independent unconditional: 61794, dependent: 42, dependent conditional: 0, dependent unconditional: 42, unknown: 71056, unknown conditional: 0, unknown unconditional: 71056] , Statistics on independence cache: Total cache size (in pairs): 243, Positive cache size: 238, Positive conditional cache size: 0, Positive unconditional cache size: 238, 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: 11.9s, 419 PlacesBefore, 56 PlacesAfterwards, 456 TransitionsBefore, 62 TransitionsAfterwards, 119004 CoEnabledTransitionPairs, 8 FixpointIterations, 60 TrivialSequentialCompositions, 297 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 131 ConcurrentYvCompositions, 31 ChoiceCompositions, 519 TotalNumberOfCompositions, 136524 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 132931, independent: 132864, independent conditional: 0, independent unconditional: 132864, dependent: 67, dependent conditional: 0, dependent unconditional: 67, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: SyntacticIndependenceRelation.Independence Queries: [ total: 71641, independent: 71611, independent conditional: 0, independent unconditional: 71611, dependent: 30, dependent conditional: 0, dependent unconditional: 30, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Cache Queries: [ total: 132931, independent: 61253, independent conditional: 0, independent unconditional: 61253, dependent: 37, dependent conditional: 0, dependent unconditional: 37, unknown: 71641, unknown conditional: 0, unknown unconditional: 71641] , Statistics on independence cache: Total cache size (in pairs): 250, Positive cache size: 244, Positive conditional cache size: 0, Positive unconditional cache size: 244, 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: 89]: 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 with 1 thread instances CFG has 7 procedures, 407 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: 12.5s, OverallIterations: 7, TraceHistogramMax: 1, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 1.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 8.5s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 127 SdHoareTripleChecker+Valid, 0.4s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 68 mSDsluCounter, 4 SdHoareTripleChecker+Invalid, 0.3s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 0 mSDsCounter, 20 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 515 IncrementalHoareTripleChecker+Invalid, 535 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 20 mSolverCounterUnsat, 4 mSDtfsCounter, 515 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 175 GetRequests, 154 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=136occurred in iteration=5, InterpolantAutomatonStates: 22, 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, 0.2s SatisfiabilityAnalysisTime, 0.7s InterpolantComputationTime, 266 NumberOfCodeBlocks, 266 NumberOfCodeBlocksAsserted, 13 NumberOfCheckSat, 285 ConstructedInterpolants, 0 QuantifiedInterpolants, 371 SizeOfPredicates, 0 NumberOfNonLiveVariables, 1047 ConjunctsInSsa, 13 ConjunctsInUnsatCore, 14 InterpolantComputations, 6 PerfectInterpolantSequences, 40/48 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - StatisticsResult: Ultimate Automizer benchmark data with 2 thread instances CFG has 10 procedures, 539 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: 175.6s, OverallIterations: 18, TraceHistogramMax: 2, PathProgramHistogramMax: 2, EmptinessCheckTime: 0.0s, AutomataDifference: 104.7s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 14.4s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 6834 SdHoareTripleChecker+Valid, 13.4s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 6364 mSDsluCounter, 19542 SdHoareTripleChecker+Invalid, 11.6s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 19490 mSDsCounter, 254 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 20899 IncrementalHoareTripleChecker+Invalid, 21153 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 254 mSolverCounterUnsat, 52 mSDtfsCounter, 20899 mSolverCounterSat, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 1675 GetRequests, 1401 SyntacticMatches, 18 SemanticMatches, 256 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2004 ImplicationChecksByTransitivity, 31.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=2118occurred in iteration=15, InterpolantAutomatonStates: 183, 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: 0.4s SsaConstructionTime, 1.2s SatisfiabilityAnalysisTime, 49.9s InterpolantComputationTime, 1538 NumberOfCodeBlocks, 1538 NumberOfCodeBlocksAsserted, 36 NumberOfCheckSat, 2148 ConstructedInterpolants, 0 QuantifiedInterpolants, 52186 SizeOfPredicates, 281 NumberOfNonLiveVariables, 5105 ConjunctsInSsa, 418 ConjunctsInUnsatCore, 47 InterpolantComputations, 6 PerfectInterpolantSequences, 817/948 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - StatisticsResult: Ultimate Automizer benchmark data for thread instance sufficiency with 1 thread instances CFG has 7 procedures, 407 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: 7.6s, OverallIterations: 1, TraceHistogramMax: 2, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 0.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 7.6s, 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, 539 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: 19.2s, OverallIterations: 7, TraceHistogramMax: 3, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 4.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 13.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 273 SdHoareTripleChecker+Valid, 0.4s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 218 mSDsluCounter, 11 SdHoareTripleChecker+Invalid, 0.3s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 0 mSDsCounter, 26 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 517 IncrementalHoareTripleChecker+Invalid, 543 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 26 mSolverCounterUnsat, 11 mSDtfsCounter, 517 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 161 GetRequests, 137 SyntacticMatches, 4 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 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, 0.2s InterpolantComputationTime, 235 NumberOfCodeBlocks, 235 NumberOfCodeBlocksAsserted, 12 NumberOfCheckSat, 262 ConstructedInterpolants, 0 QuantifiedInterpolants, 434 SizeOfPredicates, 0 NumberOfNonLiveVariables, 758 ConjunctsInSsa, 18 ConjunctsInUnsatCore, 14 InterpolantComputations, 5 PerfectInterpolantSequences, 157/178 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 08:26:37,379 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...