/usr/bin/java -Xmx16000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s /storage/repos/CAV22/benchmarks/svcomp-Reach-32bit-Automizer_Default.epf --traceabstraction.order.of.the.error.locations.to.be.checked INSUFFICIENT_FIRST -tc /storage/repos/CAV22/benchmarks/AutomizerCInline.xml -i /storage/repos/CAV22/benchmarks/increased_bounds/weaver_chl-exp-term-subst.wvr_bound2.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-19404b3-m [2023-08-04 02:02:07,897 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-08-04 02:02:07,934 INFO L114 SettingsManager]: Loading settings from /storage/repos/CAV22/benchmarks/svcomp-Reach-32bit-Automizer_Default.epf [2023-08-04 02:02:07,938 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-08-04 02:02:07,939 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-08-04 02:02:07,939 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Translation Mode: [2023-08-04 02:02:07,939 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Checked method. Library mode if empty. [2023-08-04 02:02:07,953 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-04 02:02:07,953 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-04 02:02:07,953 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-04 02:02:07,954 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-04 02:02:07,954 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-04 02:02:07,954 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-04 02:02:07,955 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-08-04 02:02:07,955 INFO L153 SettingsManager]: * Use SBE=true [2023-08-04 02:02:07,955 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-04 02:02:07,955 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-04 02:02:07,956 INFO L153 SettingsManager]: * sizeof long=4 [2023-08-04 02:02:07,956 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-04 02:02:07,956 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-08-04 02:02:07,957 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-08-04 02:02:07,960 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-04 02:02:07,960 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-04 02:02:07,960 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-04 02:02:07,960 INFO L153 SettingsManager]: * sizeof long double=12 [2023-08-04 02:02:07,960 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-08-04 02:02:07,961 INFO L153 SettingsManager]: * Use constant arrays=true [2023-08-04 02:02:07,961 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-04 02:02:07,961 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-04 02:02:07,961 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-04 02:02:07,961 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-04 02:02:07,961 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-04 02:02:07,961 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-04 02:02:07,962 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-04 02:02:07,962 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-04 02:02:07,962 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-04 02:02:07,962 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-04 02:02:07,962 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-08-04 02:02:07,962 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-04 02:02:07,962 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-04 02:02:07,963 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-04 02:02:07,964 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Order of the error locations to be checked -> INSUFFICIENT_FIRST [2023-08-04 02:02:08,146 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-04 02:02:08,163 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-04 02:02:08,165 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-04 02:02:08,165 INFO L270 PluginConnector]: Initializing CDTParser... [2023-08-04 02:02:08,166 INFO L274 PluginConnector]: CDTParser initialized [2023-08-04 02:02:08,167 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/CAV22/benchmarks/increased_bounds/weaver_chl-exp-term-subst.wvr_bound2.c [2023-08-04 02:02:09,111 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-08-04 02:02:09,267 INFO L384 CDTParser]: Found 1 translation units. [2023-08-04 02:02:09,267 INFO L180 CDTParser]: Scanning /storage/repos/CAV22/benchmarks/increased_bounds/weaver_chl-exp-term-subst.wvr_bound2.c [2023-08-04 02:02:09,273 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7bcdcb73a/055867746f3f4e66ba4a119f4d727f97/FLAG624c40114 [2023-08-04 02:02:09,282 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7bcdcb73a/055867746f3f4e66ba4a119f4d727f97 [2023-08-04 02:02:09,284 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-04 02:02:09,284 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-08-04 02:02:09,285 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-04 02:02:09,285 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-04 02:02:09,288 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-04 02:02:09,288 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.08 02:02:09" (1/1) ... [2023-08-04 02:02:09,289 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@f1bb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 02:02:09, skipping insertion in model container [2023-08-04 02:02:09,289 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.08 02:02:09" (1/1) ... [2023-08-04 02:02:09,304 INFO L176 MainTranslator]: Built tables and reachable declarations [2023-08-04 02:02:09,423 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-exp-term-subst.wvr_bound2.c[3315,3328] [2023-08-04 02:02:09,425 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-04 02:02:09,431 INFO L201 MainTranslator]: Completed pre-run [2023-08-04 02:02:09,453 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-exp-term-subst.wvr_bound2.c[3315,3328] [2023-08-04 02:02:09,454 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-04 02:02:09,463 INFO L206 MainTranslator]: Completed translation [2023-08-04 02:02:09,464 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 02:02:09 WrapperNode [2023-08-04 02:02:09,464 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-04 02:02:09,465 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-04 02:02:09,465 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-04 02:02:09,465 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-04 02:02:09,469 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 02:02:09" (1/1) ... [2023-08-04 02:02:09,477 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 02:02:09" (1/1) ... [2023-08-04 02:02:09,494 INFO L138 Inliner]: procedures = 23, calls = 31, calls flagged for inlining = 9, calls inlined = 13, statements flattened = 230 [2023-08-04 02:02:09,494 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-04 02:02:09,495 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-04 02:02:09,495 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-04 02:02:09,495 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-08-04 02:02:09,500 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 02:02:09" (1/1) ... [2023-08-04 02:02:09,501 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 02:02:09" (1/1) ... [2023-08-04 02:02:09,505 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 02:02:09" (1/1) ... [2023-08-04 02:02:09,505 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 02:02:09" (1/1) ... [2023-08-04 02:02:09,510 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 02:02:09" (1/1) ... [2023-08-04 02:02:09,516 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 02:02:09" (1/1) ... [2023-08-04 02:02:09,521 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 02:02:09" (1/1) ... [2023-08-04 02:02:09,522 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 02:02:09" (1/1) ... [2023-08-04 02:02:09,524 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-04 02:02:09,525 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-04 02:02:09,525 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-08-04 02:02:09,525 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-08-04 02:02:09,525 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 02:02:09" (1/1) ... [2023-08-04 02:02:09,537 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-04 02:02:09,547 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 02:02:09,557 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-08-04 02:02:09,577 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-08-04 02:02:09,591 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-04 02:02:09,591 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-08-04 02:02:09,591 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-08-04 02:02:09,591 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-08-04 02:02:09,591 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-08-04 02:02:09,591 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2023-08-04 02:02:09,591 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2023-08-04 02:02:09,591 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-04 02:02:09,591 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-04 02:02:09,591 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-04 02:02:09,592 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-04 02:02:09,592 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-04 02:02:09,592 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-04 02:02:09,592 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-04 02:02:09,593 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-08-04 02:02:09,670 INFO L236 CfgBuilder]: Building ICFG [2023-08-04 02:02:09,671 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-04 02:02:09,928 INFO L277 CfgBuilder]: Performing block encoding [2023-08-04 02:02:09,935 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-04 02:02:09,935 INFO L302 CfgBuilder]: Removed 6 assume(true) statements. [2023-08-04 02:02:09,937 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.08 02:02:09 BoogieIcfgContainer [2023-08-04 02:02:09,937 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-04 02:02:09,939 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-04 02:02:09,939 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-08-04 02:02:09,941 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-08-04 02:02:09,941 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 04.08 02:02:09" (1/3) ... [2023-08-04 02:02:09,941 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5ef83438 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.08 02:02:09, skipping insertion in model container [2023-08-04 02:02:09,941 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 02:02:09" (2/3) ... [2023-08-04 02:02:09,942 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5ef83438 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.08 02:02:09, skipping insertion in model container [2023-08-04 02:02:09,942 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.08 02:02:09" (3/3) ... [2023-08-04 02:02:09,943 INFO L112 eAbstractionObserver]: Analyzing ICFG weaver_chl-exp-term-subst.wvr_bound2.c [2023-08-04 02:02:09,948 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-08-04 02:02:09,953 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-04 02:02:09,954 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-08-04 02:02:09,954 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-04 02:02:10,043 INFO L144 ThreadInstanceAdder]: Constructed 9 joinOtherThreadTransitions. [2023-08-04 02:02:10,089 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 236 places, 261 transitions, 564 flow [2023-08-04 02:02:10,250 INFO L124 PetriNetUnfolderBase]: 125/887 cut-off events. [2023-08-04 02:02:10,250 INFO L125 PetriNetUnfolderBase]: For 36/36 co-relation queries the response was YES. [2023-08-04 02:02:10,263 INFO L83 FinitePrefix]: Finished finitePrefix Result has 948 conditions, 887 events. 125/887 cut-off events. For 36/36 co-relation queries the response was YES. Maximal size of possible extension queue 30. Compared 5420 event pairs, 0 based on Foata normal form. 0/752 useless extension candidates. Maximal degree in co-relation 460. Up to 16 conditions per place. [2023-08-04 02:02:10,263 INFO L82 GeneralOperation]: Start removeDead. Operand has 236 places, 261 transitions, 564 flow [2023-08-04 02:02:10,273 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 236 places, 261 transitions, 564 flow [2023-08-04 02:02:10,276 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-04 02:02:10,285 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 236 places, 261 transitions, 564 flow [2023-08-04 02:02:10,290 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 236 places, 261 transitions, 564 flow [2023-08-04 02:02:10,290 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 236 places, 261 transitions, 564 flow [2023-08-04 02:02:10,374 INFO L124 PetriNetUnfolderBase]: 125/887 cut-off events. [2023-08-04 02:02:10,374 INFO L125 PetriNetUnfolderBase]: For 36/36 co-relation queries the response was YES. [2023-08-04 02:02:10,382 INFO L83 FinitePrefix]: Finished finitePrefix Result has 948 conditions, 887 events. 125/887 cut-off events. For 36/36 co-relation queries the response was YES. Maximal size of possible extension queue 30. Compared 5420 event pairs, 0 based on Foata normal form. 0/752 useless extension candidates. Maximal degree in co-relation 460. Up to 16 conditions per place. [2023-08-04 02:02:10,409 INFO L119 LiptonReduction]: Number of co-enabled transitions 28548 [2023-08-04 02:02:16,253 INFO L134 LiptonReduction]: Checked pairs total: 31843 [2023-08-04 02:02:16,254 INFO L136 LiptonReduction]: Total number of compositions: 289 [2023-08-04 02:02:16,271 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-04 02:02:16,275 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;@37027289, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-04 02:02:16,276 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2023-08-04 02:02:16,280 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-04 02:02:16,280 INFO L124 PetriNetUnfolderBase]: 0/26 cut-off events. [2023-08-04 02:02:16,280 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 02:02:16,280 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 02:02:16,281 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2023-08-04 02:02:16,281 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-04 02:02:16,284 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 02:02:16,284 INFO L85 PathProgramCache]: Analyzing trace with hash 1792378657, now seen corresponding path program 1 times [2023-08-04 02:02:16,291 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 02:02:16,291 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1757729149] [2023-08-04 02:02:16,291 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 02:02:16,291 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 02:02:16,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-04 02:02:16,378 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-04 02:02:16,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-04 02:02:16,418 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-04 02:02:16,419 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-04 02:02:16,420 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (2 of 3 remaining) [2023-08-04 02:02:16,421 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 3 remaining) [2023-08-04 02:02:16,421 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 3 remaining) [2023-08-04 02:02:16,422 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-04 02:02:16,422 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-04 02:02:16,425 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE,UNKNOWN,UNKNOWN (1/2) [2023-08-04 02:02:16,425 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-04 02:02:16,425 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-08-04 02:02:16,467 INFO L144 ThreadInstanceAdder]: Constructed 18 joinOtherThreadTransitions. [2023-08-04 02:02:16,470 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 347 places, 390 transitions, 870 flow [2023-08-04 02:02:17,331 INFO L124 PetriNetUnfolderBase]: 1028/5263 cut-off events. [2023-08-04 02:02:17,331 INFO L125 PetriNetUnfolderBase]: For 602/602 co-relation queries the response was YES. [2023-08-04 02:02:17,417 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5937 conditions, 5263 events. 1028/5263 cut-off events. For 602/602 co-relation queries the response was YES. Maximal size of possible extension queue 123. Compared 46649 event pairs, 22 based on Foata normal form. 0/4479 useless extension candidates. Maximal degree in co-relation 3136. Up to 192 conditions per place. [2023-08-04 02:02:17,417 INFO L82 GeneralOperation]: Start removeDead. Operand has 347 places, 390 transitions, 870 flow [2023-08-04 02:02:17,452 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 347 places, 390 transitions, 870 flow [2023-08-04 02:02:17,452 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-04 02:02:17,452 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 347 places, 390 transitions, 870 flow [2023-08-04 02:02:17,453 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 347 places, 390 transitions, 870 flow [2023-08-04 02:02:17,453 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 347 places, 390 transitions, 870 flow [2023-08-04 02:02:18,086 INFO L124 PetriNetUnfolderBase]: 1028/5263 cut-off events. [2023-08-04 02:02:18,087 INFO L125 PetriNetUnfolderBase]: For 602/602 co-relation queries the response was YES. [2023-08-04 02:02:18,182 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5937 conditions, 5263 events. 1028/5263 cut-off events. For 602/602 co-relation queries the response was YES. Maximal size of possible extension queue 123. Compared 46649 event pairs, 22 based on Foata normal form. 0/4479 useless extension candidates. Maximal degree in co-relation 3136. Up to 192 conditions per place. [2023-08-04 02:02:18,445 INFO L119 LiptonReduction]: Number of co-enabled transitions 89388 [2023-08-04 02:02:27,029 INFO L134 LiptonReduction]: Checked pairs total: 110186 [2023-08-04 02:02:27,029 INFO L136 LiptonReduction]: Total number of compositions: 450 [2023-08-04 02:02:27,031 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-04 02:02:27,036 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;@37027289, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-04 02:02:27,039 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2023-08-04 02:02:27,044 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-04 02:02:27,045 INFO L124 PetriNetUnfolderBase]: 10/104 cut-off events. [2023-08-04 02:02:27,045 INFO L125 PetriNetUnfolderBase]: For 15/15 co-relation queries the response was YES. [2023-08-04 02:02:27,045 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 02:02:27,045 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1] [2023-08-04 02:02:27,045 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-04 02:02:27,045 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 02:02:27,045 INFO L85 PathProgramCache]: Analyzing trace with hash 1098786401, now seen corresponding path program 1 times [2023-08-04 02:02:27,045 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 02:02:27,046 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [901402127] [2023-08-04 02:02:27,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 02:02:27,046 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 02:02:27,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 02:02:27,180 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-04 02:02:27,181 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 02:02:27,181 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [901402127] [2023-08-04 02:02:27,181 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [901402127] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 02:02:27,181 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2117080848] [2023-08-04 02:02:27,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 02:02:27,181 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 02:02:27,182 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 02:02:27,185 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 02:02:27,188 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-08-04 02:02:27,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 02:02:27,245 INFO L262 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-04 02:02:27,246 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 02:02:27,274 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-04 02:02:27,275 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 02:02:27,275 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2117080848] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 02:02:27,275 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 02:02:27,275 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 5 [2023-08-04 02:02:27,275 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [654607910] [2023-08-04 02:02:27,276 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 02:02:27,280 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 02:02:27,283 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 02:02:27,304 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 02:02:27,305 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-08-04 02:02:27,336 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 340 out of 840 [2023-08-04 02:02:27,342 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 62 transitions, 214 flow. Second operand has 5 states, 5 states have (on average 341.6) internal successors, (1708), 5 states have internal predecessors, (1708), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:02:27,342 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 02:02:27,342 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 340 of 840 [2023-08-04 02:02:27,343 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 02:02:31,586 INFO L124 PetriNetUnfolderBase]: 21630/33446 cut-off events. [2023-08-04 02:02:31,586 INFO L125 PetriNetUnfolderBase]: For 6363/6363 co-relation queries the response was YES. [2023-08-04 02:02:31,631 INFO L83 FinitePrefix]: Finished finitePrefix Result has 69101 conditions, 33446 events. 21630/33446 cut-off events. For 6363/6363 co-relation queries the response was YES. Maximal size of possible extension queue 771. Compared 223583 event pairs, 11780 based on Foata normal form. 729/31586 useless extension candidates. Maximal degree in co-relation 27599. Up to 30577 conditions per place. [2023-08-04 02:02:31,659 INFO L140 encePairwiseOnDemand]: 834/840 looper letters, 23 selfloop transitions, 5 changer transitions 33/66 dead transitions. [2023-08-04 02:02:31,659 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 66 transitions, 332 flow [2023-08-04 02:02:31,660 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-04 02:02:31,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-04 02:02:31,670 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1760 transitions. [2023-08-04 02:02:31,673 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41904761904761906 [2023-08-04 02:02:31,673 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1760 transitions. [2023-08-04 02:02:31,674 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1760 transitions. [2023-08-04 02:02:31,676 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 02:02:31,677 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1760 transitions. [2023-08-04 02:02:31,682 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 352.0) internal successors, (1760), 5 states have internal predecessors, (1760), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:02:31,691 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 840.0) internal successors, (5040), 6 states have internal predecessors, (5040), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:02:31,692 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 840.0) internal successors, (5040), 6 states have internal predecessors, (5040), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:02:31,694 INFO L175 Difference]: Start difference. First operand has 56 places, 62 transitions, 214 flow. Second operand 5 states and 1760 transitions. [2023-08-04 02:02:31,694 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 66 transitions, 332 flow [2023-08-04 02:02:31,702 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 66 transitions, 324 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-04 02:02:31,704 INFO L231 Difference]: Finished difference. Result has 57 places, 29 transitions, 105 flow [2023-08-04 02:02:31,705 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=840, PETRI_DIFFERENCE_MINUEND_FLOW=196, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=105, PETRI_PLACES=57, PETRI_TRANSITIONS=29} [2023-08-04 02:02:31,707 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 1 predicate places. [2023-08-04 02:02:31,708 INFO L495 AbstractCegarLoop]: Abstraction has has 57 places, 29 transitions, 105 flow [2023-08-04 02:02:31,709 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 341.6) internal successors, (1708), 5 states have internal predecessors, (1708), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:02:31,709 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 02:02:31,709 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1] [2023-08-04 02:02:31,725 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-08-04 02:02:31,917 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 02:02:31,917 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-04 02:02:31,917 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 02:02:31,917 INFO L85 PathProgramCache]: Analyzing trace with hash 1511338492, now seen corresponding path program 1 times [2023-08-04 02:02:31,918 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 02:02:31,918 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [455172270] [2023-08-04 02:02:31,918 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 02:02:31,918 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 02:02:31,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 02:02:31,966 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-08-04 02:02:31,966 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 02:02:31,966 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [455172270] [2023-08-04 02:02:31,966 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [455172270] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 02:02:31,966 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 02:02:31,966 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-04 02:02:31,966 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1306408661] [2023-08-04 02:02:31,966 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 02:02:31,967 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 02:02:31,967 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 02:02:31,967 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 02:02:31,967 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-04 02:02:31,988 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 341 out of 840 [2023-08-04 02:02:31,989 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 29 transitions, 105 flow. Second operand has 3 states, 3 states have (on average 343.0) internal successors, (1029), 3 states have internal predecessors, (1029), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:02:31,989 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 02:02:31,990 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 341 of 840 [2023-08-04 02:02:31,990 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 02:02:32,383 INFO L124 PetriNetUnfolderBase]: 1984/3191 cut-off events. [2023-08-04 02:02:32,383 INFO L125 PetriNetUnfolderBase]: For 346/346 co-relation queries the response was YES. [2023-08-04 02:02:32,387 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6758 conditions, 3191 events. 1984/3191 cut-off events. For 346/346 co-relation queries the response was YES. Maximal size of possible extension queue 102. Compared 15939 event pairs, 1498 based on Foata normal form. 1/3144 useless extension candidates. Maximal degree in co-relation 2883. Up to 2957 conditions per place. [2023-08-04 02:02:32,394 INFO L140 encePairwiseOnDemand]: 837/840 looper letters, 23 selfloop transitions, 2 changer transitions 0/30 dead transitions. [2023-08-04 02:02:32,394 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 30 transitions, 156 flow [2023-08-04 02:02:32,395 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 02:02:32,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 02:02:32,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1048 transitions. [2023-08-04 02:02:32,397 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4158730158730159 [2023-08-04 02:02:32,397 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1048 transitions. [2023-08-04 02:02:32,397 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1048 transitions. [2023-08-04 02:02:32,398 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 02:02:32,398 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1048 transitions. [2023-08-04 02:02:32,399 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 349.3333333333333) internal successors, (1048), 3 states have internal predecessors, (1048), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:02:32,402 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 840.0) internal successors, (3360), 4 states have internal predecessors, (3360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:02:32,404 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 840.0) internal successors, (3360), 4 states have internal predecessors, (3360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:02:32,404 INFO L175 Difference]: Start difference. First operand has 57 places, 29 transitions, 105 flow. Second operand 3 states and 1048 transitions. [2023-08-04 02:02:32,404 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 30 transitions, 156 flow [2023-08-04 02:02:32,405 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 43 places, 30 transitions, 151 flow, removed 2 selfloop flow, removed 1 redundant places. [2023-08-04 02:02:32,406 INFO L231 Difference]: Finished difference. Result has 43 places, 28 transitions, 99 flow [2023-08-04 02:02:32,406 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=840, PETRI_DIFFERENCE_MINUEND_FLOW=95, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=28, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=99, PETRI_PLACES=43, PETRI_TRANSITIONS=28} [2023-08-04 02:02:32,406 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, -13 predicate places. [2023-08-04 02:02:32,407 INFO L495 AbstractCegarLoop]: Abstraction has has 43 places, 28 transitions, 99 flow [2023-08-04 02:02:32,407 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 343.0) internal successors, (1029), 3 states have internal predecessors, (1029), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:02:32,407 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 02:02:32,407 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 02:02:32,407 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-08-04 02:02:32,408 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-04 02:02:32,408 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 02:02:32,408 INFO L85 PathProgramCache]: Analyzing trace with hash 940435565, now seen corresponding path program 1 times [2023-08-04 02:02:32,408 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 02:02:32,408 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [253315883] [2023-08-04 02:02:32,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 02:02:32,408 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 02:02:32,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 02:02:32,497 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-08-04 02:02:32,497 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 02:02:32,497 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [253315883] [2023-08-04 02:02:32,497 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [253315883] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 02:02:32,498 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1950371703] [2023-08-04 02:02:32,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 02:02:32,498 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 02:02:32,498 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 02:02:32,500 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 02:02:32,520 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-08-04 02:02:32,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 02:02:32,588 INFO L262 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-04 02:02:32,589 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 02:02:32,599 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-08-04 02:02:32,600 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 02:02:32,615 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-08-04 02:02:32,615 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1950371703] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 02:02:32,616 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 02:02:32,616 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 4 [2023-08-04 02:02:32,616 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1362771989] [2023-08-04 02:02:32,616 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 02:02:32,617 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 02:02:32,617 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 02:02:32,617 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 02:02:32,617 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-04 02:02:32,628 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 340 out of 840 [2023-08-04 02:02:32,630 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 28 transitions, 99 flow. Second operand has 5 states, 5 states have (on average 342.6) internal successors, (1713), 5 states have internal predecessors, (1713), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:02:32,630 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 02:02:32,630 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 340 of 840 [2023-08-04 02:02:32,630 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 02:02:33,000 INFO L124 PetriNetUnfolderBase]: 1432/2243 cut-off events. [2023-08-04 02:02:33,000 INFO L125 PetriNetUnfolderBase]: For 174/174 co-relation queries the response was YES. [2023-08-04 02:02:33,003 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4683 conditions, 2243 events. 1432/2243 cut-off events. For 174/174 co-relation queries the response was YES. Maximal size of possible extension queue 69. Compared 9903 event pairs, 784 based on Foata normal form. 2/2213 useless extension candidates. Maximal degree in co-relation 2652. Up to 2073 conditions per place. [2023-08-04 02:02:33,008 INFO L140 encePairwiseOnDemand]: 837/840 looper letters, 23 selfloop transitions, 3 changer transitions 0/31 dead transitions. [2023-08-04 02:02:33,008 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 31 transitions, 156 flow [2023-08-04 02:02:33,009 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 02:02:33,009 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 02:02:33,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1387 transitions. [2023-08-04 02:02:33,011 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.412797619047619 [2023-08-04 02:02:33,012 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1387 transitions. [2023-08-04 02:02:33,012 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1387 transitions. [2023-08-04 02:02:33,012 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 02:02:33,012 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1387 transitions. [2023-08-04 02:02:33,014 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 346.75) internal successors, (1387), 4 states have internal predecessors, (1387), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:02:33,018 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 840.0) internal successors, (4200), 5 states have internal predecessors, (4200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:02:33,020 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 840.0) internal successors, (4200), 5 states have internal predecessors, (4200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:02:33,020 INFO L175 Difference]: Start difference. First operand has 43 places, 28 transitions, 99 flow. Second operand 4 states and 1387 transitions. [2023-08-04 02:02:33,020 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 31 transitions, 156 flow [2023-08-04 02:02:33,020 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 31 transitions, 152 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-04 02:02:33,021 INFO L231 Difference]: Finished difference. Result has 44 places, 27 transitions, 96 flow [2023-08-04 02:02:33,021 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=840, PETRI_DIFFERENCE_MINUEND_FLOW=90, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=27, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=96, PETRI_PLACES=44, PETRI_TRANSITIONS=27} [2023-08-04 02:02:33,021 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, -12 predicate places. [2023-08-04 02:02:33,021 INFO L495 AbstractCegarLoop]: Abstraction has has 44 places, 27 transitions, 96 flow [2023-08-04 02:02:33,022 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 342.6) internal successors, (1713), 5 states have internal predecessors, (1713), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:02:33,022 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 02:02:33,022 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 02:02:33,029 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-08-04 02:02:33,227 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2023-08-04 02:02:33,227 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-04 02:02:33,227 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 02:02:33,227 INFO L85 PathProgramCache]: Analyzing trace with hash 1188153341, now seen corresponding path program 1 times [2023-08-04 02:02:33,227 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 02:02:33,228 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [693925959] [2023-08-04 02:02:33,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 02:02:33,228 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 02:02:33,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 02:02:33,289 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-04 02:02:33,290 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 02:02:33,290 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [693925959] [2023-08-04 02:02:33,290 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [693925959] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 02:02:33,290 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [213773247] [2023-08-04 02:02:33,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 02:02:33,290 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 02:02:33,290 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 02:02:33,292 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 02:02:33,294 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-08-04 02:02:33,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 02:02:33,367 INFO L262 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-04 02:02:33,368 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 02:02:33,386 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-04 02:02:33,386 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 02:02:33,386 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [213773247] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 02:02:33,386 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 02:02:33,386 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 6 [2023-08-04 02:02:33,386 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [320778069] [2023-08-04 02:02:33,386 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 02:02:33,387 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 02:02:33,387 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 02:02:33,387 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 02:02:33,387 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-08-04 02:02:33,399 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 340 out of 840 [2023-08-04 02:02:33,400 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 27 transitions, 96 flow. Second operand has 5 states, 5 states have (on average 342.6) internal successors, (1713), 5 states have internal predecessors, (1713), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:02:33,400 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 02:02:33,400 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 340 of 840 [2023-08-04 02:02:33,401 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 02:02:33,776 INFO L124 PetriNetUnfolderBase]: 1400/2195 cut-off events. [2023-08-04 02:02:33,776 INFO L125 PetriNetUnfolderBase]: For 154/154 co-relation queries the response was YES. [2023-08-04 02:02:33,778 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4583 conditions, 2195 events. 1400/2195 cut-off events. For 154/154 co-relation queries the response was YES. Maximal size of possible extension queue 69. Compared 9698 event pairs, 344 based on Foata normal form. 0/2179 useless extension candidates. Maximal degree in co-relation 2583. Up to 1904 conditions per place. [2023-08-04 02:02:33,782 INFO L140 encePairwiseOnDemand]: 836/840 looper letters, 30 selfloop transitions, 5 changer transitions 0/39 dead transitions. [2023-08-04 02:02:33,782 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 39 transitions, 188 flow [2023-08-04 02:02:33,782 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-04 02:02:33,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-04 02:02:33,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1735 transitions. [2023-08-04 02:02:33,786 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41309523809523807 [2023-08-04 02:02:33,786 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1735 transitions. [2023-08-04 02:02:33,786 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1735 transitions. [2023-08-04 02:02:33,786 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 02:02:33,786 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1735 transitions. [2023-08-04 02:02:33,789 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 347.0) internal successors, (1735), 5 states have internal predecessors, (1735), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:02:33,794 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 840.0) internal successors, (5040), 6 states have internal predecessors, (5040), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:02:33,795 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 840.0) internal successors, (5040), 6 states have internal predecessors, (5040), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:02:33,795 INFO L175 Difference]: Start difference. First operand has 44 places, 27 transitions, 96 flow. Second operand 5 states and 1735 transitions. [2023-08-04 02:02:33,795 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 39 transitions, 188 flow [2023-08-04 02:02:33,797 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 43 places, 39 transitions, 181 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-08-04 02:02:33,797 INFO L231 Difference]: Finished difference. Result has 44 places, 29 transitions, 108 flow [2023-08-04 02:02:33,797 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=840, PETRI_DIFFERENCE_MINUEND_FLOW=85, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=26, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=108, PETRI_PLACES=44, PETRI_TRANSITIONS=29} [2023-08-04 02:02:33,799 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, -12 predicate places. [2023-08-04 02:02:33,799 INFO L495 AbstractCegarLoop]: Abstraction has has 44 places, 29 transitions, 108 flow [2023-08-04 02:02:33,799 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 342.6) internal successors, (1713), 5 states have internal predecessors, (1713), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:02:33,799 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 02:02:33,800 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 02:02:33,806 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-08-04 02:02:34,003 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 02:02:34,004 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-04 02:02:34,004 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 02:02:34,004 INFO L85 PathProgramCache]: Analyzing trace with hash -650540950, now seen corresponding path program 1 times [2023-08-04 02:02:34,004 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 02:02:34,004 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2090240483] [2023-08-04 02:02:34,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 02:02:34,004 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 02:02:34,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 02:02:34,034 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2023-08-04 02:02:34,035 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 02:02:34,035 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2090240483] [2023-08-04 02:02:34,035 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2090240483] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 02:02:34,035 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 02:02:34,035 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-04 02:02:34,035 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [160292070] [2023-08-04 02:02:34,035 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 02:02:34,035 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 02:02:34,035 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 02:02:34,036 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 02:02:34,036 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-04 02:02:34,043 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 341 out of 840 [2023-08-04 02:02:34,044 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 29 transitions, 108 flow. Second operand has 3 states, 3 states have (on average 344.6666666666667) internal successors, (1034), 3 states have internal predecessors, (1034), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:02:34,044 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 02:02:34,044 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 341 of 840 [2023-08-04 02:02:34,044 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 02:02:34,317 INFO L124 PetriNetUnfolderBase]: 1272/1967 cut-off events. [2023-08-04 02:02:34,317 INFO L125 PetriNetUnfolderBase]: For 182/182 co-relation queries the response was YES. [2023-08-04 02:02:34,320 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4164 conditions, 1967 events. 1272/1967 cut-off events. For 182/182 co-relation queries the response was YES. Maximal size of possible extension queue 66. Compared 8193 event pairs, 992 based on Foata normal form. 4/1967 useless extension candidates. Maximal degree in co-relation 2335. Up to 1801 conditions per place. [2023-08-04 02:02:34,323 INFO L140 encePairwiseOnDemand]: 837/840 looper letters, 26 selfloop transitions, 2 changer transitions 0/32 dead transitions. [2023-08-04 02:02:34,323 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 32 transitions, 169 flow [2023-08-04 02:02:34,324 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 02:02:34,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 02:02:34,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1050 transitions. [2023-08-04 02:02:34,326 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4166666666666667 [2023-08-04 02:02:34,326 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1050 transitions. [2023-08-04 02:02:34,326 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1050 transitions. [2023-08-04 02:02:34,327 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 02:02:34,327 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1050 transitions. [2023-08-04 02:02:34,329 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 350.0) internal successors, (1050), 3 states have internal predecessors, (1050), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:02:34,331 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 840.0) internal successors, (3360), 4 states have internal predecessors, (3360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:02:34,332 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 840.0) internal successors, (3360), 4 states have internal predecessors, (3360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:02:34,332 INFO L175 Difference]: Start difference. First operand has 44 places, 29 transitions, 108 flow. Second operand 3 states and 1050 transitions. [2023-08-04 02:02:34,332 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 32 transitions, 169 flow [2023-08-04 02:02:34,333 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 32 transitions, 168 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 02:02:34,333 INFO L231 Difference]: Finished difference. Result has 45 places, 28 transitions, 106 flow [2023-08-04 02:02:34,333 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=840, PETRI_DIFFERENCE_MINUEND_FLOW=102, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=28, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=106, PETRI_PLACES=45, PETRI_TRANSITIONS=28} [2023-08-04 02:02:34,335 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, -11 predicate places. [2023-08-04 02:02:34,336 INFO L495 AbstractCegarLoop]: Abstraction has has 45 places, 28 transitions, 106 flow [2023-08-04 02:02:34,336 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 344.6666666666667) internal successors, (1034), 3 states have internal predecessors, (1034), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:02:34,336 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 02:02:34,336 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 02:02:34,336 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-08-04 02:02:34,336 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-04 02:02:34,337 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 02:02:34,337 INFO L85 PathProgramCache]: Analyzing trace with hash 712613604, now seen corresponding path program 1 times [2023-08-04 02:02:34,337 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 02:02:34,337 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1278585086] [2023-08-04 02:02:34,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 02:02:34,338 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 02:02:34,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 02:02:34,380 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2023-08-04 02:02:34,381 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 02:02:34,381 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1278585086] [2023-08-04 02:02:34,382 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1278585086] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 02:02:34,382 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1551258709] [2023-08-04 02:02:34,382 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 02:02:34,382 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 02:02:34,382 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 02:02:34,383 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 02:02:34,410 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-08-04 02:02:34,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 02:02:34,487 INFO L262 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-04 02:02:34,488 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 02:02:34,504 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2023-08-04 02:02:34,505 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 02:02:34,517 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2023-08-04 02:02:34,517 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1551258709] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 02:02:34,517 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 02:02:34,517 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 5 [2023-08-04 02:02:34,517 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [670280341] [2023-08-04 02:02:34,517 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 02:02:34,518 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 02:02:34,518 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 02:02:34,518 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 02:02:34,518 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-04 02:02:34,528 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 340 out of 840 [2023-08-04 02:02:34,529 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 28 transitions, 106 flow. Second operand has 5 states, 5 states have (on average 343.6) internal successors, (1718), 5 states have internal predecessors, (1718), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:02:34,529 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 02:02:34,529 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 340 of 840 [2023-08-04 02:02:34,529 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 02:02:34,762 INFO L124 PetriNetUnfolderBase]: 936/1431 cut-off events. [2023-08-04 02:02:34,763 INFO L125 PetriNetUnfolderBase]: For 158/158 co-relation queries the response was YES. [2023-08-04 02:02:34,765 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 5338 event pairs, 536 based on Foata normal form. 8/1435 useless extension candidates. Maximal degree in co-relation 1701. Up to 1225 conditions per place. [2023-08-04 02:02:34,768 INFO L140 encePairwiseOnDemand]: 837/840 looper letters, 28 selfloop transitions, 3 changer transitions 0/35 dead transitions. [2023-08-04 02:02:34,768 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 35 transitions, 181 flow [2023-08-04 02:02:34,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 02:02:34,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 02:02:34,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1391 transitions. [2023-08-04 02:02:34,771 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4139880952380952 [2023-08-04 02:02:34,771 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1391 transitions. [2023-08-04 02:02:34,771 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1391 transitions. [2023-08-04 02:02:34,772 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 02:02:34,772 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1391 transitions. [2023-08-04 02:02:34,773 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 347.75) internal successors, (1391), 4 states have internal predecessors, (1391), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:02:34,776 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 840.0) internal successors, (4200), 5 states have internal predecessors, (4200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:02:34,777 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 840.0) internal successors, (4200), 5 states have internal predecessors, (4200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:02:34,777 INFO L175 Difference]: Start difference. First operand has 45 places, 28 transitions, 106 flow. Second operand 4 states and 1391 transitions. [2023-08-04 02:02:34,777 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 35 transitions, 181 flow [2023-08-04 02:02:34,778 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 35 transitions, 177 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-04 02:02:34,778 INFO L231 Difference]: Finished difference. Result has 46 places, 27 transitions, 103 flow [2023-08-04 02:02:34,778 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=840, PETRI_DIFFERENCE_MINUEND_FLOW=97, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=27, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=103, PETRI_PLACES=46, PETRI_TRANSITIONS=27} [2023-08-04 02:02:34,778 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, -10 predicate places. [2023-08-04 02:02:34,779 INFO L495 AbstractCegarLoop]: Abstraction has has 46 places, 27 transitions, 103 flow [2023-08-04 02:02:34,779 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 343.6) internal successors, (1718), 5 states have internal predecessors, (1718), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:02:34,779 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 02:02:34,779 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 02:02:34,785 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-08-04 02:02:34,983 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 02:02:34,984 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-04 02:02:34,984 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 02:02:34,984 INFO L85 PathProgramCache]: Analyzing trace with hash -95178243, now seen corresponding path program 1 times [2023-08-04 02:02:34,984 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 02:02:34,984 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1032943310] [2023-08-04 02:02:34,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 02:02:34,984 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 02:02:34,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 02:02:35,020 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-08-04 02:02:35,020 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 02:02:35,020 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1032943310] [2023-08-04 02:02:35,020 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1032943310] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 02:02:35,020 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [842930064] [2023-08-04 02:02:35,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 02:02:35,020 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 02:02:35,020 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 02:02:35,021 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 02:02:35,023 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-08-04 02:02:35,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 02:02:35,102 INFO L262 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-04 02:02:35,102 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 02:02:35,120 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-08-04 02:02:35,120 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 02:02:35,120 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [842930064] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 02:02:35,120 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 02:02:35,120 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 6 [2023-08-04 02:02:35,121 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1350817915] [2023-08-04 02:02:35,121 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 02:02:35,121 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 02:02:35,121 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 02:02:35,121 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 02:02:35,121 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-08-04 02:02:35,132 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 340 out of 840 [2023-08-04 02:02:35,133 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 27 transitions, 103 flow. Second operand has 5 states, 5 states have (on average 343.6) internal successors, (1718), 5 states have internal predecessors, (1718), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:02:35,133 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 02:02:35,133 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 340 of 840 [2023-08-04 02:02:35,133 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 02:02:35,436 INFO L124 PetriNetUnfolderBase]: 744/1143 cut-off events. [2023-08-04 02:02:35,436 INFO L125 PetriNetUnfolderBase]: For 190/190 co-relation queries the response was YES. [2023-08-04 02:02:35,438 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 3998 event pairs, 104 based on Foata normal form. 64/1203 useless extension candidates. Maximal degree in co-relation 1399. Up to 448 conditions per place. [2023-08-04 02:02:35,438 INFO L140 encePairwiseOnDemand]: 837/840 looper letters, 0 selfloop transitions, 0 changer transitions 43/43 dead transitions. [2023-08-04 02:02:35,438 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 43 transitions, 213 flow [2023-08-04 02:02:35,439 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-04 02:02:35,439 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-04 02:02:35,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1739 transitions. [2023-08-04 02:02:35,442 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41404761904761905 [2023-08-04 02:02:35,442 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1739 transitions. [2023-08-04 02:02:35,442 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1739 transitions. [2023-08-04 02:02:35,443 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 02:02:35,443 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1739 transitions. [2023-08-04 02:02:35,446 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 347.8) internal successors, (1739), 5 states have internal predecessors, (1739), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:02:35,450 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 840.0) internal successors, (5040), 6 states have internal predecessors, (5040), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:02:35,455 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 840.0) internal successors, (5040), 6 states have internal predecessors, (5040), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:02:35,456 INFO L175 Difference]: Start difference. First operand has 46 places, 27 transitions, 103 flow. Second operand 5 states and 1739 transitions. [2023-08-04 02:02:35,456 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 49 places, 43 transitions, 213 flow [2023-08-04 02:02:35,457 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 43 transitions, 206 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-08-04 02:02:35,457 INFO L231 Difference]: Finished difference. Result has 45 places, 0 transitions, 0 flow [2023-08-04 02:02:35,457 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=840, PETRI_DIFFERENCE_MINUEND_FLOW=92, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=26, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=0, PETRI_PLACES=45, PETRI_TRANSITIONS=0} [2023-08-04 02:02:35,457 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, -11 predicate places. [2023-08-04 02:02:35,458 INFO L495 AbstractCegarLoop]: Abstraction has has 45 places, 0 transitions, 0 flow [2023-08-04 02:02:35,458 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 343.6) internal successors, (1718), 5 states have internal predecessors, (1718), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:02:35,458 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (2 of 3 remaining) [2023-08-04 02:02:35,459 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 3 remaining) [2023-08-04 02:02:35,459 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 3 remaining) [2023-08-04 02:02:35,464 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-08-04 02:02:35,663 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 02:02:35,664 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1, 1] [2023-08-04 02:02:35,664 INFO L307 ceAbstractionStarter]: Result for error location InUseError was SAFE,SAFE,SAFE (1/2) [2023-08-04 02:02:35,668 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 347 places, 390 transitions, 870 flow [2023-08-04 02:02:36,449 INFO L124 PetriNetUnfolderBase]: 1028/5263 cut-off events. [2023-08-04 02:02:36,450 INFO L125 PetriNetUnfolderBase]: For 602/602 co-relation queries the response was YES. [2023-08-04 02:02:36,559 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5937 conditions, 5263 events. 1028/5263 cut-off events. For 602/602 co-relation queries the response was YES. Maximal size of possible extension queue 123. Compared 46649 event pairs, 22 based on Foata normal form. 0/4479 useless extension candidates. Maximal degree in co-relation 3136. Up to 192 conditions per place. [2023-08-04 02:02:36,560 INFO L82 GeneralOperation]: Start removeDead. Operand has 347 places, 390 transitions, 870 flow [2023-08-04 02:02:36,599 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 347 places, 390 transitions, 870 flow [2023-08-04 02:02:36,599 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-04 02:02:36,600 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 347 places, 390 transitions, 870 flow [2023-08-04 02:02:36,600 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 347 places, 390 transitions, 870 flow [2023-08-04 02:02:36,600 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 347 places, 390 transitions, 870 flow [2023-08-04 02:02:37,364 INFO L124 PetriNetUnfolderBase]: 1028/5263 cut-off events. [2023-08-04 02:02:37,364 INFO L125 PetriNetUnfolderBase]: For 602/602 co-relation queries the response was YES. [2023-08-04 02:02:37,470 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5937 conditions, 5263 events. 1028/5263 cut-off events. For 602/602 co-relation queries the response was YES. Maximal size of possible extension queue 123. Compared 46649 event pairs, 22 based on Foata normal form. 0/4479 useless extension candidates. Maximal degree in co-relation 3136. Up to 192 conditions per place. [2023-08-04 02:02:37,680 INFO L119 LiptonReduction]: Number of co-enabled transitions 89388 [2023-08-04 02:02:45,990 INFO L134 LiptonReduction]: Checked pairs total: 107399 [2023-08-04 02:02:45,991 INFO L136 LiptonReduction]: Total number of compositions: 441 [2023-08-04 02:02:45,992 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-04 02:02:45,992 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;@37027289, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-04 02:02:45,992 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-04 02:02:45,995 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-04 02:02:45,995 INFO L124 PetriNetUnfolderBase]: 1/34 cut-off events. [2023-08-04 02:02:45,995 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-08-04 02:02:45,995 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 02:02:45,995 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 02:02:45,995 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 02:02:45,995 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 02:02:45,995 INFO L85 PathProgramCache]: Analyzing trace with hash 759554834, now seen corresponding path program 1 times [2023-08-04 02:02:45,995 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 02:02:45,997 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1607387896] [2023-08-04 02:02:45,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 02:02:45,997 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 02:02:46,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 02:02:46,010 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-04 02:02:46,011 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 02:02:46,011 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1607387896] [2023-08-04 02:02:46,011 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1607387896] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 02:02:46,011 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 02:02:46,011 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-04 02:02:46,011 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [917158176] [2023-08-04 02:02:46,011 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 02:02:46,013 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 02:02:46,013 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 02:02:46,014 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 02:02:46,014 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-04 02:02:46,023 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 341 out of 831 [2023-08-04 02:02:46,024 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 62 transitions, 214 flow. Second operand has 3 states, 3 states have (on average 343.3333333333333) internal successors, (1030), 3 states have internal predecessors, (1030), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:02:46,024 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 02:02:46,024 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 341 of 831 [2023-08-04 02:02:46,024 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 02:02:49,768 INFO L124 PetriNetUnfolderBase]: 21389/32791 cut-off events. [2023-08-04 02:02:49,769 INFO L125 PetriNetUnfolderBase]: For 6700/6700 co-relation queries the response was YES. [2023-08-04 02:02:49,811 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 215714 event pairs, 14517 based on Foata normal form. 729/30967 useless extension candidates. Maximal degree in co-relation 27444. Up to 30193 conditions per place. [2023-08-04 02:02:49,876 INFO L140 encePairwiseOnDemand]: 826/831 looper letters, 51 selfloop transitions, 2 changer transitions 3/63 dead transitions. [2023-08-04 02:02:49,877 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 63 transitions, 322 flow [2023-08-04 02:02:49,877 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 02:02:49,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 02:02:49,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1079 transitions. [2023-08-04 02:02:49,879 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43281187324508624 [2023-08-04 02:02:49,879 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1079 transitions. [2023-08-04 02:02:49,879 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1079 transitions. [2023-08-04 02:02:49,880 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 02:02:49,880 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1079 transitions. [2023-08-04 02:02:49,881 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 359.6666666666667) internal successors, (1079), 3 states have internal predecessors, (1079), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:02:49,883 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 831.0) internal successors, (3324), 4 states have internal predecessors, (3324), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:02:49,883 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 831.0) internal successors, (3324), 4 states have internal predecessors, (3324), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:02:49,884 INFO L175 Difference]: Start difference. First operand has 56 places, 62 transitions, 214 flow. Second operand 3 states and 1079 transitions. [2023-08-04 02:02:49,884 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 63 transitions, 322 flow [2023-08-04 02:02:49,887 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 63 transitions, 322 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-04 02:02:49,888 INFO L231 Difference]: Finished difference. Result has 58 places, 58 transitions, 204 flow [2023-08-04 02:02:49,888 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=831, PETRI_DIFFERENCE_MINUEND_FLOW=210, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=60, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=204, PETRI_PLACES=58, PETRI_TRANSITIONS=58} [2023-08-04 02:02:49,889 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 2 predicate places. [2023-08-04 02:02:49,889 INFO L495 AbstractCegarLoop]: Abstraction has has 58 places, 58 transitions, 204 flow [2023-08-04 02:02:49,889 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 343.3333333333333) internal successors, (1030), 3 states have internal predecessors, (1030), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:02:49,889 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 02:02:49,889 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 02:02:49,890 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-08-04 02:02:49,890 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 02:02:49,890 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 02:02:49,890 INFO L85 PathProgramCache]: Analyzing trace with hash -286788410, now seen corresponding path program 1 times [2023-08-04 02:02:49,890 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 02:02:49,890 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1793754961] [2023-08-04 02:02:49,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 02:02:49,890 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 02:02:49,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 02:02:49,930 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-04 02:02:49,931 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 02:02:49,931 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1793754961] [2023-08-04 02:02:49,931 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1793754961] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 02:02:49,931 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1801185782] [2023-08-04 02:02:49,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 02:02:49,931 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 02:02:49,931 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 02:02:49,932 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 02:02:49,937 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-08-04 02:02:50,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 02:02:50,011 INFO L262 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 02:02:50,012 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 02:02:50,017 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-04 02:02:50,017 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 02:02:50,017 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1801185782] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 02:02:50,017 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 02:02:50,017 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2023-08-04 02:02:50,019 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1483093096] [2023-08-04 02:02:50,019 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 02:02:50,019 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 02:02:50,020 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 02:02:50,020 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 02:02:50,020 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 02:02:50,027 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 341 out of 831 [2023-08-04 02:02:50,028 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 58 transitions, 204 flow. Second operand has 3 states, 3 states have (on average 344.6666666666667) internal successors, (1034), 3 states have internal predecessors, (1034), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:02:50,028 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 02:02:50,028 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 341 of 831 [2023-08-04 02:02:50,028 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 02:02:53,438 INFO L124 PetriNetUnfolderBase]: 21175/32283 cut-off events. [2023-08-04 02:02:53,438 INFO L125 PetriNetUnfolderBase]: For 6457/6457 co-relation queries the response was YES. [2023-08-04 02:02:53,484 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 209949 event pairs, 14444 based on Foata normal form. 0/29802 useless extension candidates. Maximal degree in co-relation 66858. Up to 29819 conditions per place. [2023-08-04 02:02:53,556 INFO L140 encePairwiseOnDemand]: 828/831 looper letters, 54 selfloop transitions, 2 changer transitions 0/63 dead transitions. [2023-08-04 02:02:53,556 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 63 transitions, 326 flow [2023-08-04 02:02:53,556 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 02:02:53,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 02:02:53,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1079 transitions. [2023-08-04 02:02:53,558 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43281187324508624 [2023-08-04 02:02:53,558 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1079 transitions. [2023-08-04 02:02:53,559 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1079 transitions. [2023-08-04 02:02:53,559 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 02:02:53,559 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1079 transitions. [2023-08-04 02:02:53,560 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 359.6666666666667) internal successors, (1079), 3 states have internal predecessors, (1079), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:02:53,562 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 831.0) internal successors, (3324), 4 states have internal predecessors, (3324), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:02:53,563 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 831.0) internal successors, (3324), 4 states have internal predecessors, (3324), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:02:53,563 INFO L175 Difference]: Start difference. First operand has 58 places, 58 transitions, 204 flow. Second operand 3 states and 1079 transitions. [2023-08-04 02:02:53,563 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 63 transitions, 326 flow [2023-08-04 02:02:53,577 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 63 transitions, 312 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-08-04 02:02:53,579 INFO L231 Difference]: Finished difference. Result has 54 places, 59 transitions, 202 flow [2023-08-04 02:02:53,580 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=831, PETRI_DIFFERENCE_MINUEND_FLOW=190, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=58, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=202, PETRI_PLACES=54, PETRI_TRANSITIONS=59} [2023-08-04 02:02:53,580 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, -2 predicate places. [2023-08-04 02:02:53,580 INFO L495 AbstractCegarLoop]: Abstraction has has 54 places, 59 transitions, 202 flow [2023-08-04 02:02:53,581 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 344.6666666666667) internal successors, (1034), 3 states have internal predecessors, (1034), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:02:53,581 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 02:02:53,581 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 02:02:53,591 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2023-08-04 02:02:53,785 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 02:02:53,785 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 02:02:53,785 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 02:02:53,785 INFO L85 PathProgramCache]: Analyzing trace with hash -2143478259, now seen corresponding path program 1 times [2023-08-04 02:02:53,786 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 02:02:53,786 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1260326368] [2023-08-04 02:02:53,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 02:02:53,786 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 02:02:53,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 02:02:53,813 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-04 02:02:53,814 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 02:02:53,814 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1260326368] [2023-08-04 02:02:53,814 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1260326368] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 02:02:53,814 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1766052591] [2023-08-04 02:02:53,814 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 02:02:53,814 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 02:02:53,814 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 02:02:53,818 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 02:02:53,836 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-08-04 02:02:53,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 02:02:53,898 INFO L262 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 02:02:53,898 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 02:02:53,902 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-04 02:02:53,902 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 02:02:53,903 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1766052591] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 02:02:53,903 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 02:02:53,903 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2023-08-04 02:02:53,903 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [8317072] [2023-08-04 02:02:53,903 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 02:02:53,903 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 02:02:53,903 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 02:02:53,903 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 02:02:53,904 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 02:02:53,910 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 341 out of 831 [2023-08-04 02:02:53,911 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 59 transitions, 202 flow. Second operand has 3 states, 3 states have (on average 345.6666666666667) internal successors, (1037), 3 states have internal predecessors, (1037), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:02:53,911 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 02:02:53,911 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 341 of 831 [2023-08-04 02:02:53,911 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 02:02:57,282 INFO L124 PetriNetUnfolderBase]: 21139/32679 cut-off events. [2023-08-04 02:02:57,282 INFO L125 PetriNetUnfolderBase]: For 2634/2634 co-relation queries the response was YES. [2023-08-04 02:02:57,356 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 218330 event pairs, 14389 based on Foata normal form. 0/30270 useless extension candidates. Maximal degree in co-relation 29434. Up to 29443 conditions per place. [2023-08-04 02:02:57,434 INFO L140 encePairwiseOnDemand]: 828/831 looper letters, 57 selfloop transitions, 2 changer transitions 0/66 dead transitions. [2023-08-04 02:02:57,434 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 66 transitions, 334 flow [2023-08-04 02:02:57,435 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 02:02:57,435 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 02:02:57,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1081 transitions. [2023-08-04 02:02:57,436 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43361411953469714 [2023-08-04 02:02:57,437 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1081 transitions. [2023-08-04 02:02:57,437 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1081 transitions. [2023-08-04 02:02:57,437 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 02:02:57,437 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1081 transitions. [2023-08-04 02:02:57,438 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 360.3333333333333) internal successors, (1081), 3 states have internal predecessors, (1081), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:02:57,440 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 831.0) internal successors, (3324), 4 states have internal predecessors, (3324), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:02:57,441 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 831.0) internal successors, (3324), 4 states have internal predecessors, (3324), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:02:57,441 INFO L175 Difference]: Start difference. First operand has 54 places, 59 transitions, 202 flow. Second operand 3 states and 1081 transitions. [2023-08-04 02:02:57,441 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 66 transitions, 334 flow [2023-08-04 02:02:57,444 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 66 transitions, 332 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 02:02:57,445 INFO L231 Difference]: Finished difference. Result has 56 places, 60 transitions, 212 flow [2023-08-04 02:02:57,445 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=831, PETRI_DIFFERENCE_MINUEND_FLOW=200, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=212, PETRI_PLACES=56, PETRI_TRANSITIONS=60} [2023-08-04 02:02:57,445 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 0 predicate places. [2023-08-04 02:02:57,446 INFO L495 AbstractCegarLoop]: Abstraction has has 56 places, 60 transitions, 212 flow [2023-08-04 02:02:57,446 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 345.6666666666667) internal successors, (1037), 3 states have internal predecessors, (1037), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:02:57,446 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 02:02:57,446 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 02:02:57,461 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2023-08-04 02:02:57,661 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 02:02:57,663 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 02:02:57,663 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 02:02:57,664 INFO L85 PathProgramCache]: Analyzing trace with hash 1937717527, now seen corresponding path program 1 times [2023-08-04 02:02:57,664 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 02:02:57,664 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [122019302] [2023-08-04 02:02:57,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 02:02:57,664 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 02:02:57,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 02:02:57,704 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-04 02:02:57,704 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 02:02:57,704 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [122019302] [2023-08-04 02:02:57,704 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [122019302] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 02:02:57,704 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1289072096] [2023-08-04 02:02:57,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 02:02:57,705 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 02:02:57,705 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 02:02:57,706 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 02:02:57,707 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-08-04 02:02:57,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 02:02:57,775 INFO L262 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 02:02:57,776 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 02:02:57,780 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-04 02:02:57,780 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 02:02:57,780 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1289072096] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 02:02:57,780 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 02:02:57,780 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2023-08-04 02:02:57,780 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1136125030] [2023-08-04 02:02:57,780 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 02:02:57,781 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 02:02:57,781 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 02:02:57,781 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 02:02:57,781 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 02:02:57,788 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 341 out of 831 [2023-08-04 02:02:57,789 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 60 transitions, 212 flow. Second operand has 3 states, 3 states have (on average 346.6666666666667) internal successors, (1040), 3 states have internal predecessors, (1040), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:02:57,789 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 02:02:57,789 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 341 of 831 [2023-08-04 02:02:57,789 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 02:03:01,160 INFO L124 PetriNetUnfolderBase]: 20051/31247 cut-off events. [2023-08-04 02:03:01,160 INFO L125 PetriNetUnfolderBase]: For 2910/2910 co-relation queries the response was YES. [2023-08-04 02:03:01,219 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 211346 event pairs, 14329 based on Foata normal form. 0/29246 useless extension candidates. Maximal degree in co-relation 30954. Up to 25511 conditions per place. [2023-08-04 02:03:01,286 INFO L140 encePairwiseOnDemand]: 828/831 looper letters, 65 selfloop transitions, 2 changer transitions 0/74 dead transitions. [2023-08-04 02:03:01,286 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 74 transitions, 389 flow [2023-08-04 02:03:01,287 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 02:03:01,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 02:03:01,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1088 transitions. [2023-08-04 02:03:01,288 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43642198154833534 [2023-08-04 02:03:01,289 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1088 transitions. [2023-08-04 02:03:01,289 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1088 transitions. [2023-08-04 02:03:01,289 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 02:03:01,289 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1088 transitions. [2023-08-04 02:03:01,290 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 362.6666666666667) internal successors, (1088), 3 states have internal predecessors, (1088), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:03:01,292 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 831.0) internal successors, (3324), 4 states have internal predecessors, (3324), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:03:01,293 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 831.0) internal successors, (3324), 4 states have internal predecessors, (3324), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:03:01,293 INFO L175 Difference]: Start difference. First operand has 56 places, 60 transitions, 212 flow. Second operand 3 states and 1088 transitions. [2023-08-04 02:03:01,293 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 74 transitions, 389 flow [2023-08-04 02:03:01,296 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 74 transitions, 387 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 02:03:01,296 INFO L231 Difference]: Finished difference. Result has 58 places, 61 transitions, 222 flow [2023-08-04 02:03:01,297 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=831, PETRI_DIFFERENCE_MINUEND_FLOW=210, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=60, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=222, PETRI_PLACES=58, PETRI_TRANSITIONS=61} [2023-08-04 02:03:01,297 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 2 predicate places. [2023-08-04 02:03:01,297 INFO L495 AbstractCegarLoop]: Abstraction has has 58 places, 61 transitions, 222 flow [2023-08-04 02:03:01,297 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 346.6666666666667) internal successors, (1040), 3 states have internal predecessors, (1040), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:03:01,297 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 02:03:01,297 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 02:03:01,306 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-08-04 02:03:01,509 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,SelfDestructingSolverStorable11 [2023-08-04 02:03:01,509 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 02:03:01,509 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 02:03:01,509 INFO L85 PathProgramCache]: Analyzing trace with hash -1754208954, now seen corresponding path program 1 times [2023-08-04 02:03:01,510 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 02:03:01,510 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1026660551] [2023-08-04 02:03:01,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 02:03:01,510 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 02:03:01,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 02:03:01,550 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-04 02:03:01,550 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 02:03:01,550 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1026660551] [2023-08-04 02:03:01,550 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1026660551] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 02:03:01,550 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1931015607] [2023-08-04 02:03:01,550 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 02:03:01,550 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 02:03:01,551 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 02:03:01,552 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 02:03:01,576 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-08-04 02:03:01,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 02:03:01,638 INFO L262 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 02:03:01,638 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 02:03:01,644 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-08-04 02:03:01,644 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 02:03:01,644 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1931015607] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 02:03:01,644 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 02:03:01,644 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2023-08-04 02:03:01,644 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [355225700] [2023-08-04 02:03:01,645 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 02:03:01,645 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 02:03:01,645 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 02:03:01,645 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 02:03:01,645 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 02:03:01,652 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 341 out of 831 [2023-08-04 02:03:01,653 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 61 transitions, 222 flow. Second operand has 3 states, 3 states have (on average 348.0) internal successors, (1044), 3 states have internal predecessors, (1044), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:03:01,653 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 02:03:01,653 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 341 of 831 [2023-08-04 02:03:01,653 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 02:03:04,806 INFO L124 PetriNetUnfolderBase]: 19362/30530 cut-off events. [2023-08-04 02:03:04,807 INFO L125 PetriNetUnfolderBase]: For 4852/4852 co-relation queries the response was YES. [2023-08-04 02:03:04,874 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 205755 event pairs, 13038 based on Foata normal form. 0/29578 useless extension candidates. Maximal degree in co-relation 34160. Up to 22127 conditions per place. [2023-08-04 02:03:04,941 INFO L140 encePairwiseOnDemand]: 828/831 looper letters, 66 selfloop transitions, 2 changer transitions 0/75 dead transitions. [2023-08-04 02:03:04,942 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 75 transitions, 401 flow [2023-08-04 02:03:04,942 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 02:03:04,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 02:03:04,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1088 transitions. [2023-08-04 02:03:04,944 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43642198154833534 [2023-08-04 02:03:04,944 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1088 transitions. [2023-08-04 02:03:04,944 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1088 transitions. [2023-08-04 02:03:04,944 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 02:03:04,944 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1088 transitions. [2023-08-04 02:03:04,946 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 362.6666666666667) internal successors, (1088), 3 states have internal predecessors, (1088), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:03:04,948 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 831.0) internal successors, (3324), 4 states have internal predecessors, (3324), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:03:04,949 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 831.0) internal successors, (3324), 4 states have internal predecessors, (3324), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:03:04,949 INFO L175 Difference]: Start difference. First operand has 58 places, 61 transitions, 222 flow. Second operand 3 states and 1088 transitions. [2023-08-04 02:03:04,949 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 75 transitions, 401 flow [2023-08-04 02:03:04,959 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 75 transitions, 399 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 02:03:04,960 INFO L231 Difference]: Finished difference. Result has 60 places, 62 transitions, 232 flow [2023-08-04 02:03:04,961 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=831, PETRI_DIFFERENCE_MINUEND_FLOW=220, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=61, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=232, PETRI_PLACES=60, PETRI_TRANSITIONS=62} [2023-08-04 02:03:04,961 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 4 predicate places. [2023-08-04 02:03:04,961 INFO L495 AbstractCegarLoop]: Abstraction has has 60 places, 62 transitions, 232 flow [2023-08-04 02:03:04,961 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 348.0) internal successors, (1044), 3 states have internal predecessors, (1044), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:03:04,961 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 02:03:04,961 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 02:03:04,971 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-08-04 02:03:05,165 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-08-04 02:03:05,166 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 02:03:05,166 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 02:03:05,166 INFO L85 PathProgramCache]: Analyzing trace with hash 245505747, now seen corresponding path program 1 times [2023-08-04 02:03:05,166 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 02:03:05,166 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1537512815] [2023-08-04 02:03:05,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 02:03:05,166 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 02:03:05,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 02:03:05,202 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-08-04 02:03:05,202 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 02:03:05,202 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1537512815] [2023-08-04 02:03:05,202 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1537512815] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 02:03:05,203 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1143413960] [2023-08-04 02:03:05,203 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 02:03:05,203 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 02:03:05,203 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 02:03:05,204 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 02:03:05,229 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-08-04 02:03:05,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 02:03:05,308 INFO L262 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 02:03:05,312 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 02:03:05,317 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-08-04 02:03:05,317 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 02:03:05,317 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1143413960] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 02:03:05,317 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 02:03:05,317 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2023-08-04 02:03:05,318 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1526649410] [2023-08-04 02:03:05,318 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 02:03:05,318 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 02:03:05,319 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 02:03:05,319 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 02:03:05,319 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 02:03:05,325 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 341 out of 831 [2023-08-04 02:03:05,326 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 62 transitions, 232 flow. Second operand has 3 states, 3 states have (on average 349.3333333333333) internal successors, (1048), 3 states have internal predecessors, (1048), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:03:05,326 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 02:03:05,326 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 341 of 831 [2023-08-04 02:03:05,326 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 02:03:08,483 INFO L124 PetriNetUnfolderBase]: 19153/30213 cut-off events. [2023-08-04 02:03:08,483 INFO L125 PetriNetUnfolderBase]: For 5944/5944 co-relation queries the response was YES. [2023-08-04 02:03:08,562 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 199071 event pairs, 14429 based on Foata normal form. 0/29974 useless extension candidates. Maximal degree in co-relation 36015. Up to 24281 conditions per place. [2023-08-04 02:03:08,633 INFO L140 encePairwiseOnDemand]: 828/831 looper letters, 67 selfloop transitions, 2 changer transitions 0/76 dead transitions. [2023-08-04 02:03:08,633 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 76 transitions, 413 flow [2023-08-04 02:03:08,633 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 02:03:08,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 02:03:08,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1088 transitions. [2023-08-04 02:03:08,636 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43642198154833534 [2023-08-04 02:03:08,636 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1088 transitions. [2023-08-04 02:03:08,636 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1088 transitions. [2023-08-04 02:03:08,636 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 02:03:08,636 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1088 transitions. [2023-08-04 02:03:08,638 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 362.6666666666667) internal successors, (1088), 3 states have internal predecessors, (1088), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:03:08,640 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 831.0) internal successors, (3324), 4 states have internal predecessors, (3324), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:03:08,641 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 831.0) internal successors, (3324), 4 states have internal predecessors, (3324), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:03:08,641 INFO L175 Difference]: Start difference. First operand has 60 places, 62 transitions, 232 flow. Second operand 3 states and 1088 transitions. [2023-08-04 02:03:08,641 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 76 transitions, 413 flow [2023-08-04 02:03:08,771 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 76 transitions, 411 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 02:03:08,772 INFO L231 Difference]: Finished difference. Result has 62 places, 63 transitions, 242 flow [2023-08-04 02:03:08,772 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=831, PETRI_DIFFERENCE_MINUEND_FLOW=230, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=62, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=242, PETRI_PLACES=62, PETRI_TRANSITIONS=63} [2023-08-04 02:03:08,773 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 6 predicate places. [2023-08-04 02:03:08,773 INFO L495 AbstractCegarLoop]: Abstraction has has 62 places, 63 transitions, 242 flow [2023-08-04 02:03:08,773 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 349.3333333333333) internal successors, (1048), 3 states have internal predecessors, (1048), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:03:08,773 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 02:03:08,773 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 02:03:08,780 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-08-04 02:03:08,978 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,SelfDestructingSolverStorable13 [2023-08-04 02:03:08,978 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 02:03:08,979 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 02:03:08,979 INFO L85 PathProgramCache]: Analyzing trace with hash -703672794, now seen corresponding path program 1 times [2023-08-04 02:03:08,979 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 02:03:08,979 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1057985970] [2023-08-04 02:03:08,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 02:03:08,979 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 02:03:08,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 02:03:09,024 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-08-04 02:03:09,024 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 02:03:09,024 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1057985970] [2023-08-04 02:03:09,024 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1057985970] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 02:03:09,024 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [339605894] [2023-08-04 02:03:09,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 02:03:09,024 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 02:03:09,024 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 02:03:09,025 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 02:03:09,027 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-08-04 02:03:09,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 02:03:09,110 INFO L262 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-04 02:03:09,110 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 02:03:09,119 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-08-04 02:03:09,119 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 02:03:09,133 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-08-04 02:03:09,134 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [339605894] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 02:03:09,134 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 02:03:09,134 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 4 [2023-08-04 02:03:09,134 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [41639477] [2023-08-04 02:03:09,134 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 02:03:09,134 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 02:03:09,135 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 02:03:09,135 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 02:03:09,135 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-04 02:03:09,145 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 340 out of 831 [2023-08-04 02:03:09,146 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 63 transitions, 242 flow. Second operand has 5 states, 5 states have (on average 346.6) internal successors, (1733), 5 states have internal predecessors, (1733), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:03:09,146 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 02:03:09,146 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 340 of 831 [2023-08-04 02:03:09,146 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 02:03:12,150 INFO L124 PetriNetUnfolderBase]: 17997/28375 cut-off events. [2023-08-04 02:03:12,150 INFO L125 PetriNetUnfolderBase]: For 5479/5479 co-relation queries the response was YES. [2023-08-04 02:03:12,210 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 188188 event pairs, 10395 based on Foata normal form. 2/28373 useless extension candidates. Maximal degree in co-relation 48888. Up to 26179 conditions per place. [2023-08-04 02:03:12,269 INFO L140 encePairwiseOnDemand]: 827/831 looper letters, 57 selfloop transitions, 3 changer transitions 1/68 dead transitions. [2023-08-04 02:03:12,269 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 68 transitions, 374 flow [2023-08-04 02:03:12,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 02:03:12,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 02:03:12,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1417 transitions. [2023-08-04 02:03:12,271 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4262936221419976 [2023-08-04 02:03:12,271 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1417 transitions. [2023-08-04 02:03:12,271 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1417 transitions. [2023-08-04 02:03:12,272 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 02:03:12,272 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1417 transitions. [2023-08-04 02:03:12,273 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 354.25) internal successors, (1417), 4 states have internal predecessors, (1417), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:03:12,276 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 831.0) internal successors, (4155), 5 states have internal predecessors, (4155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:03:12,276 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 831.0) internal successors, (4155), 5 states have internal predecessors, (4155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:03:12,276 INFO L175 Difference]: Start difference. First operand has 62 places, 63 transitions, 242 flow. Second operand 4 states and 1417 transitions. [2023-08-04 02:03:12,276 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 68 transitions, 374 flow [2023-08-04 02:03:12,477 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 68 transitions, 372 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 02:03:12,478 INFO L231 Difference]: Finished difference. Result has 66 places, 63 transitions, 254 flow [2023-08-04 02:03:12,478 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=831, PETRI_DIFFERENCE_MINUEND_FLOW=240, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=63, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=254, PETRI_PLACES=66, PETRI_TRANSITIONS=63} [2023-08-04 02:03:12,479 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 10 predicate places. [2023-08-04 02:03:12,480 INFO L495 AbstractCegarLoop]: Abstraction has has 66 places, 63 transitions, 254 flow [2023-08-04 02:03:12,480 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 346.6) internal successors, (1733), 5 states have internal predecessors, (1733), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:03:12,480 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 02:03:12,480 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 02:03:12,491 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-08-04 02:03:12,685 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,SelfDestructingSolverStorable14 [2023-08-04 02:03:12,685 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 02:03:12,685 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 02:03:12,685 INFO L85 PathProgramCache]: Analyzing trace with hash 1565865284, now seen corresponding path program 1 times [2023-08-04 02:03:12,685 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 02:03:12,686 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [273683772] [2023-08-04 02:03:12,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 02:03:12,686 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 02:03:12,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 02:03:12,728 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-08-04 02:03:12,728 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 02:03:12,728 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [273683772] [2023-08-04 02:03:12,728 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [273683772] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 02:03:12,729 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1590740939] [2023-08-04 02:03:12,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 02:03:12,729 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 02:03:12,729 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 02:03:12,730 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 02:03:12,732 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-08-04 02:03:12,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 02:03:12,820 INFO L262 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-04 02:03:12,821 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 02:03:12,833 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 02:03:12,833 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 02:03:12,848 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-08-04 02:03:12,848 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1590740939] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 02:03:12,848 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 02:03:12,848 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 5 [2023-08-04 02:03:12,848 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1829813784] [2023-08-04 02:03:12,849 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 02:03:12,849 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 02:03:12,849 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 02:03:12,849 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 02:03:12,849 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-04 02:03:12,860 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 340 out of 831 [2023-08-04 02:03:12,861 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 63 transitions, 254 flow. Second operand has 5 states, 5 states have (on average 346.8) internal successors, (1734), 5 states have internal predecessors, (1734), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:03:12,861 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 02:03:12,861 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 340 of 831 [2023-08-04 02:03:12,861 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 02:03:16,012 INFO L124 PetriNetUnfolderBase]: 17145/27047 cut-off events. [2023-08-04 02:03:16,012 INFO L125 PetriNetUnfolderBase]: For 4623/4623 co-relation queries the response was YES. [2023-08-04 02:03:16,055 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 179624 event pairs, 10068 based on Foata normal form. 8/27051 useless extension candidates. Maximal degree in co-relation 45955. Up to 24835 conditions per place. [2023-08-04 02:03:16,106 INFO L140 encePairwiseOnDemand]: 827/831 looper letters, 61 selfloop transitions, 3 changer transitions 1/72 dead transitions. [2023-08-04 02:03:16,106 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 72 transitions, 402 flow [2023-08-04 02:03:16,106 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 02:03:16,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 02:03:16,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1421 transitions. [2023-08-04 02:03:16,109 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42749699157641396 [2023-08-04 02:03:16,109 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1421 transitions. [2023-08-04 02:03:16,109 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1421 transitions. [2023-08-04 02:03:16,109 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 02:03:16,109 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1421 transitions. [2023-08-04 02:03:16,111 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 355.25) internal successors, (1421), 4 states have internal predecessors, (1421), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:03:16,113 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 831.0) internal successors, (4155), 5 states have internal predecessors, (4155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:03:16,113 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 831.0) internal successors, (4155), 5 states have internal predecessors, (4155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:03:16,113 INFO L175 Difference]: Start difference. First operand has 66 places, 63 transitions, 254 flow. Second operand 4 states and 1421 transitions. [2023-08-04 02:03:16,113 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 72 transitions, 402 flow [2023-08-04 02:03:16,219 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 72 transitions, 392 flow, removed 1 selfloop flow, removed 3 redundant places. [2023-08-04 02:03:16,220 INFO L231 Difference]: Finished difference. Result has 68 places, 63 transitions, 258 flow [2023-08-04 02:03:16,220 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=831, PETRI_DIFFERENCE_MINUEND_FLOW=244, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=63, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=258, PETRI_PLACES=68, PETRI_TRANSITIONS=63} [2023-08-04 02:03:16,220 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 12 predicate places. [2023-08-04 02:03:16,221 INFO L495 AbstractCegarLoop]: Abstraction has has 68 places, 63 transitions, 258 flow [2023-08-04 02:03:16,221 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 346.8) internal successors, (1734), 5 states have internal predecessors, (1734), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:03:16,221 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 02:03:16,221 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 02:03:16,226 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-08-04 02:03:16,421 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,SelfDestructingSolverStorable15 [2023-08-04 02:03:16,422 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 02:03:16,422 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 02:03:16,422 INFO L85 PathProgramCache]: Analyzing trace with hash 541670080, now seen corresponding path program 1 times [2023-08-04 02:03:16,422 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 02:03:16,422 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1017721420] [2023-08-04 02:03:16,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 02:03:16,422 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 02:03:16,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 02:03:16,469 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-08-04 02:03:16,469 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 02:03:16,469 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1017721420] [2023-08-04 02:03:16,470 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1017721420] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 02:03:16,470 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1988523335] [2023-08-04 02:03:16,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 02:03:16,470 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 02:03:16,470 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 02:03:16,471 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 02:03:16,473 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-08-04 02:03:16,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 02:03:16,576 INFO L262 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-04 02:03:16,578 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 02:03:16,587 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-08-04 02:03:16,587 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 02:03:16,597 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-08-04 02:03:16,598 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1988523335] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 02:03:16,598 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 02:03:16,598 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 5 [2023-08-04 02:03:16,598 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1690061204] [2023-08-04 02:03:16,598 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 02:03:16,598 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 02:03:16,598 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 02:03:16,598 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 02:03:16,599 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-04 02:03:16,607 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 340 out of 831 [2023-08-04 02:03:16,609 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 63 transitions, 258 flow. Second operand has 5 states, 5 states have (on average 347.0) internal successors, (1735), 5 states have internal predecessors, (1735), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:03:16,609 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 02:03:16,609 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 340 of 831 [2023-08-04 02:03:16,609 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 02:03:19,410 INFO L124 PetriNetUnfolderBase]: 16713/26375 cut-off events. [2023-08-04 02:03:19,410 INFO L125 PetriNetUnfolderBase]: For 4364/4364 co-relation queries the response was YES. [2023-08-04 02:03:19,485 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 173664 event pairs, 9727 based on Foata normal form. 32/26403 useless extension candidates. Maximal degree in co-relation 43949. Up to 23507 conditions per place. [2023-08-04 02:03:19,555 INFO L140 encePairwiseOnDemand]: 827/831 looper letters, 65 selfloop transitions, 3 changer transitions 1/76 dead transitions. [2023-08-04 02:03:19,555 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 76 transitions, 422 flow [2023-08-04 02:03:19,556 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 02:03:19,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 02:03:19,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1425 transitions. [2023-08-04 02:03:19,558 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4287003610108303 [2023-08-04 02:03:19,558 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1425 transitions. [2023-08-04 02:03:19,558 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1425 transitions. [2023-08-04 02:03:19,558 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 02:03:19,558 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1425 transitions. [2023-08-04 02:03:19,560 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 356.25) internal successors, (1425), 4 states have internal predecessors, (1425), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:03:19,562 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 831.0) internal successors, (4155), 5 states have internal predecessors, (4155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:03:19,562 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 831.0) internal successors, (4155), 5 states have internal predecessors, (4155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:03:19,562 INFO L175 Difference]: Start difference. First operand has 68 places, 63 transitions, 258 flow. Second operand 4 states and 1425 transitions. [2023-08-04 02:03:19,562 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 76 transitions, 422 flow [2023-08-04 02:03:19,695 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 76 transitions, 412 flow, removed 1 selfloop flow, removed 3 redundant places. [2023-08-04 02:03:19,696 INFO L231 Difference]: Finished difference. Result has 70 places, 63 transitions, 262 flow [2023-08-04 02:03:19,696 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=831, PETRI_DIFFERENCE_MINUEND_FLOW=248, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=63, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=262, PETRI_PLACES=70, PETRI_TRANSITIONS=63} [2023-08-04 02:03:19,696 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 14 predicate places. [2023-08-04 02:03:19,696 INFO L495 AbstractCegarLoop]: Abstraction has has 70 places, 63 transitions, 262 flow [2023-08-04 02:03:19,696 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 347.0) internal successors, (1735), 5 states have internal predecessors, (1735), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:03:19,696 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 02:03:19,696 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 02:03:19,701 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2023-08-04 02:03:19,897 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,SelfDestructingSolverStorable16 [2023-08-04 02:03:19,897 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 02:03:19,897 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 02:03:19,897 INFO L85 PathProgramCache]: Analyzing trace with hash 711377631, now seen corresponding path program 1 times [2023-08-04 02:03:19,898 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 02:03:19,898 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1634954698] [2023-08-04 02:03:19,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 02:03:19,898 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 02:03:19,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 02:03:19,983 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2023-08-04 02:03:19,983 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 02:03:19,983 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1634954698] [2023-08-04 02:03:19,983 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1634954698] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 02:03:19,983 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [571116334] [2023-08-04 02:03:19,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 02:03:19,983 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 02:03:19,983 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 02:03:19,984 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 02:03:19,991 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-08-04 02:03:20,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 02:03:20,089 INFO L262 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-04 02:03:20,090 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 02:03:20,107 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2023-08-04 02:03:20,107 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 02:03:20,121 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2023-08-04 02:03:20,121 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [571116334] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 02:03:20,121 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 02:03:20,121 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 5 [2023-08-04 02:03:20,121 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2007732188] [2023-08-04 02:03:20,121 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 02:03:20,122 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 02:03:20,122 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 02:03:20,122 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 02:03:20,122 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-04 02:03:20,133 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 340 out of 831 [2023-08-04 02:03:20,134 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 70 places, 63 transitions, 262 flow. Second operand has 5 states, 5 states have (on average 347.2) internal successors, (1736), 5 states have internal predecessors, (1736), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:03:20,134 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 02:03:20,134 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 340 of 831 [2023-08-04 02:03:20,134 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 02:03:21,941 INFO L124 PetriNetUnfolderBase]: 10381/16595 cut-off events. [2023-08-04 02:03:21,942 INFO L125 PetriNetUnfolderBase]: For 3584/3584 co-relation queries the response was YES. [2023-08-04 02:03:21,977 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 100947 event pairs, 5440 based on Foata normal form. 192/16783 useless extension candidates. Maximal degree in co-relation 32048. Up to 9564 conditions per place. [2023-08-04 02:03:22,012 INFO L140 encePairwiseOnDemand]: 827/831 looper letters, 72 selfloop transitions, 4 changer transitions 0/83 dead transitions. [2023-08-04 02:03:22,012 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 83 transitions, 467 flow [2023-08-04 02:03:22,013 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 02:03:22,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 02:03:22,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1432 transitions. [2023-08-04 02:03:22,015 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43080625752105894 [2023-08-04 02:03:22,015 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1432 transitions. [2023-08-04 02:03:22,015 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1432 transitions. [2023-08-04 02:03:22,015 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 02:03:22,015 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1432 transitions. [2023-08-04 02:03:22,017 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 358.0) internal successors, (1432), 4 states have internal predecessors, (1432), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:03:22,019 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 831.0) internal successors, (4155), 5 states have internal predecessors, (4155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:03:22,019 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 831.0) internal successors, (4155), 5 states have internal predecessors, (4155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:03:22,019 INFO L175 Difference]: Start difference. First operand has 70 places, 63 transitions, 262 flow. Second operand 4 states and 1432 transitions. [2023-08-04 02:03:22,019 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 83 transitions, 467 flow [2023-08-04 02:03:22,090 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 83 transitions, 456 flow, removed 1 selfloop flow, removed 3 redundant places. [2023-08-04 02:03:22,090 INFO L231 Difference]: Finished difference. Result has 72 places, 64 transitions, 272 flow [2023-08-04 02:03:22,091 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=831, PETRI_DIFFERENCE_MINUEND_FLOW=252, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=63, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=272, PETRI_PLACES=72, PETRI_TRANSITIONS=64} [2023-08-04 02:03:22,091 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 16 predicate places. [2023-08-04 02:03:22,091 INFO L495 AbstractCegarLoop]: Abstraction has has 72 places, 64 transitions, 272 flow [2023-08-04 02:03:22,091 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 347.2) internal successors, (1736), 5 states have internal predecessors, (1736), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:03:22,091 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 02:03:22,091 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 02:03:22,098 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2023-08-04 02:03:22,296 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 02:03:22,297 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 02:03:22,297 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 02:03:22,297 INFO L85 PathProgramCache]: Analyzing trace with hash -1305751058, now seen corresponding path program 1 times [2023-08-04 02:03:22,297 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 02:03:22,297 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1656133466] [2023-08-04 02:03:22,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 02:03:22,297 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 02:03:22,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 02:03:22,370 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2023-08-04 02:03:22,370 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 02:03:22,370 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1656133466] [2023-08-04 02:03:22,370 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1656133466] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 02:03:22,370 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [138796594] [2023-08-04 02:03:22,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 02:03:22,370 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 02:03:22,370 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 02:03:22,371 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 02:03:22,373 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-08-04 02:03:22,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 02:03:22,473 INFO L262 TraceCheckSpWp]: Trace formula consists of 217 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-04 02:03:22,474 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 02:03:22,483 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2023-08-04 02:03:22,483 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 02:03:22,492 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2023-08-04 02:03:22,492 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [138796594] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 02:03:22,492 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 02:03:22,492 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 5 [2023-08-04 02:03:22,492 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1273382324] [2023-08-04 02:03:22,492 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 02:03:22,493 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 02:03:22,493 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 02:03:22,493 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 02:03:22,493 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-04 02:03:22,501 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 340 out of 831 [2023-08-04 02:03:22,502 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 64 transitions, 272 flow. Second operand has 5 states, 5 states have (on average 347.6) internal successors, (1738), 5 states have internal predecessors, (1738), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:03:22,502 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 02:03:22,502 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 340 of 831 [2023-08-04 02:03:22,502 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 02:03:24,191 INFO L124 PetriNetUnfolderBase]: 9421/14944 cut-off events. [2023-08-04 02:03:24,192 INFO L125 PetriNetUnfolderBase]: For 6527/6527 co-relation queries the response was YES. [2023-08-04 02:03:24,243 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 88178 event pairs, 5948 based on Foata normal form. 233/15173 useless extension candidates. Maximal degree in co-relation 34698. Up to 8751 conditions per place. [2023-08-04 02:03:24,275 INFO L140 encePairwiseOnDemand]: 827/831 looper letters, 73 selfloop transitions, 4 changer transitions 0/84 dead transitions. [2023-08-04 02:03:24,276 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 84 transitions, 478 flow [2023-08-04 02:03:24,276 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 02:03:24,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 02:03:24,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1432 transitions. [2023-08-04 02:03:24,278 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43080625752105894 [2023-08-04 02:03:24,278 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1432 transitions. [2023-08-04 02:03:24,278 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1432 transitions. [2023-08-04 02:03:24,279 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 02:03:24,279 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1432 transitions. [2023-08-04 02:03:24,280 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 358.0) internal successors, (1432), 4 states have internal predecessors, (1432), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:03:24,282 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 831.0) internal successors, (4155), 5 states have internal predecessors, (4155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:03:24,282 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 831.0) internal successors, (4155), 5 states have internal predecessors, (4155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:03:24,282 INFO L175 Difference]: Start difference. First operand has 72 places, 64 transitions, 272 flow. Second operand 4 states and 1432 transitions. [2023-08-04 02:03:24,282 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 84 transitions, 478 flow [2023-08-04 02:03:24,345 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 84 transitions, 474 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-08-04 02:03:24,346 INFO L231 Difference]: Finished difference. Result has 76 places, 65 transitions, 288 flow [2023-08-04 02:03:24,346 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=831, PETRI_DIFFERENCE_MINUEND_FLOW=268, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=64, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=288, PETRI_PLACES=76, PETRI_TRANSITIONS=65} [2023-08-04 02:03:24,346 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 20 predicate places. [2023-08-04 02:03:24,346 INFO L495 AbstractCegarLoop]: Abstraction has has 76 places, 65 transitions, 288 flow [2023-08-04 02:03:24,347 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 347.6) internal successors, (1738), 5 states have internal predecessors, (1738), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:03:24,347 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 02:03:24,347 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 02:03:24,351 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2023-08-04 02:03:24,547 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 02:03:24,548 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 02:03:24,548 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 02:03:24,548 INFO L85 PathProgramCache]: Analyzing trace with hash -226061707, now seen corresponding path program 1 times [2023-08-04 02:03:24,548 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 02:03:24,548 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [829091877] [2023-08-04 02:03:24,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 02:03:24,548 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 02:03:24,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 02:03:24,613 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2023-08-04 02:03:24,613 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 02:03:24,613 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [829091877] [2023-08-04 02:03:24,613 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [829091877] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 02:03:24,613 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2034482530] [2023-08-04 02:03:24,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 02:03:24,613 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 02:03:24,613 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 02:03:24,614 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 02:03:24,616 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-08-04 02:03:24,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 02:03:24,725 INFO L262 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-04 02:03:24,726 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 02:03:24,738 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2023-08-04 02:03:24,739 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 02:03:24,753 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2023-08-04 02:03:24,753 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2034482530] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 02:03:24,753 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 02:03:24,753 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 5 [2023-08-04 02:03:24,753 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2051086923] [2023-08-04 02:03:24,754 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 02:03:24,754 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 02:03:24,754 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 02:03:24,754 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 02:03:24,754 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-04 02:03:24,762 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 340 out of 831 [2023-08-04 02:03:24,763 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 65 transitions, 288 flow. Second operand has 5 states, 5 states have (on average 348.0) internal successors, (1740), 5 states have internal predecessors, (1740), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:03:24,763 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 02:03:24,763 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 340 of 831 [2023-08-04 02:03:24,763 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 02:03:26,471 INFO L124 PetriNetUnfolderBase]: 9409/14897 cut-off events. [2023-08-04 02:03:26,471 INFO L125 PetriNetUnfolderBase]: For 7481/7481 co-relation queries the response was YES. [2023-08-04 02:03:26,503 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 87868 event pairs, 8414 based on Foata normal form. 13/14906 useless extension candidates. Maximal degree in co-relation 36338. Up to 13454 conditions per place. [2023-08-04 02:03:26,529 INFO L140 encePairwiseOnDemand]: 827/831 looper letters, 72 selfloop transitions, 3 changer transitions 3/85 dead transitions. [2023-08-04 02:03:26,529 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 85 transitions, 496 flow [2023-08-04 02:03:26,529 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 02:03:26,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 02:03:26,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1432 transitions. [2023-08-04 02:03:26,531 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43080625752105894 [2023-08-04 02:03:26,531 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1432 transitions. [2023-08-04 02:03:26,531 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1432 transitions. [2023-08-04 02:03:26,532 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 02:03:26,532 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1432 transitions. [2023-08-04 02:03:26,533 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 358.0) internal successors, (1432), 4 states have internal predecessors, (1432), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:03:26,535 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 831.0) internal successors, (4155), 5 states have internal predecessors, (4155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:03:26,535 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 831.0) internal successors, (4155), 5 states have internal predecessors, (4155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:03:26,535 INFO L175 Difference]: Start difference. First operand has 76 places, 65 transitions, 288 flow. Second operand 4 states and 1432 transitions. [2023-08-04 02:03:26,535 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 85 transitions, 496 flow [2023-08-04 02:03:26,672 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 78 places, 85 transitions, 492 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-08-04 02:03:26,673 INFO L231 Difference]: Finished difference. Result has 80 places, 63 transitions, 286 flow [2023-08-04 02:03:26,673 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=831, PETRI_DIFFERENCE_MINUEND_FLOW=284, PETRI_DIFFERENCE_MINUEND_PLACES=75, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=65, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=286, PETRI_PLACES=80, PETRI_TRANSITIONS=63} [2023-08-04 02:03:26,674 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 24 predicate places. [2023-08-04 02:03:26,674 INFO L495 AbstractCegarLoop]: Abstraction has has 80 places, 63 transitions, 286 flow [2023-08-04 02:03:26,674 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 348.0) internal successors, (1740), 5 states have internal predecessors, (1740), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:03:26,674 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 02:03:26,674 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 02:03:26,680 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2023-08-04 02:03:26,875 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 02:03:26,875 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 02:03:26,875 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 02:03:26,875 INFO L85 PathProgramCache]: Analyzing trace with hash -121142042, now seen corresponding path program 1 times [2023-08-04 02:03:26,875 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 02:03:26,875 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [178662527] [2023-08-04 02:03:26,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 02:03:26,876 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 02:03:27,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 02:03:29,300 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2023-08-04 02:03:29,301 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 02:03:29,301 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [178662527] [2023-08-04 02:03:29,301 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [178662527] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 02:03:29,301 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [585673299] [2023-08-04 02:03:29,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 02:03:29,301 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 02:03:29,301 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 02:03:29,302 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 02:03:29,305 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2023-08-04 02:03:29,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 02:03:29,422 INFO L262 TraceCheckSpWp]: Trace formula consists of 235 conjuncts, 13 conjunts are in the unsatisfiable core [2023-08-04 02:03:29,425 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 02:03:32,518 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2023-08-04 02:03:32,518 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 02:03:34,718 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2023-08-04 02:03:34,719 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [585673299] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 02:03:34,719 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 02:03:34,719 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 15 [2023-08-04 02:03:34,719 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2099516783] [2023-08-04 02:03:34,719 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 02:03:34,720 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-08-04 02:03:34,721 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 02:03:34,722 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-08-04 02:03:34,722 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2023-08-04 02:03:35,687 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 292 out of 831 [2023-08-04 02:03:35,689 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 80 places, 63 transitions, 286 flow. Second operand has 15 states, 15 states have (on average 298.8666666666667) internal successors, (4483), 15 states have internal predecessors, (4483), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:03:35,689 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 02:03:35,689 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 292 of 831 [2023-08-04 02:03:35,689 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 02:03:40,453 INFO L124 PetriNetUnfolderBase]: 15094/24040 cut-off events. [2023-08-04 02:03:40,453 INFO L125 PetriNetUnfolderBase]: For 16333/16333 co-relation queries the response was YES. [2023-08-04 02:03:40,523 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60049 conditions, 24040 events. 15094/24040 cut-off events. For 16333/16333 co-relation queries the response was YES. Maximal size of possible extension queue 684. Compared 163065 event pairs, 1432 based on Foata normal form. 2/23907 useless extension candidates. Maximal degree in co-relation 59936. Up to 6570 conditions per place. [2023-08-04 02:03:40,559 INFO L140 encePairwiseOnDemand]: 822/831 looper letters, 160 selfloop transitions, 13 changer transitions 93/273 dead transitions. [2023-08-04 02:03:40,560 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 89 places, 273 transitions, 1819 flow [2023-08-04 02:03:40,560 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-08-04 02:03:40,560 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-08-04 02:03:40,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 3159 transitions. [2023-08-04 02:03:40,565 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38014440433213 [2023-08-04 02:03:40,565 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 3159 transitions. [2023-08-04 02:03:40,565 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 3159 transitions. [2023-08-04 02:03:40,566 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 02:03:40,566 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 3159 transitions. [2023-08-04 02:03:40,570 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 315.9) internal successors, (3159), 10 states have internal predecessors, (3159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:03:40,575 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 831.0) internal successors, (9141), 11 states have internal predecessors, (9141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:03:40,575 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 831.0) internal successors, (9141), 11 states have internal predecessors, (9141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:03:40,576 INFO L175 Difference]: Start difference. First operand has 80 places, 63 transitions, 286 flow. Second operand 10 states and 3159 transitions. [2023-08-04 02:03:40,576 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 89 places, 273 transitions, 1819 flow [2023-08-04 02:03:40,867 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 85 places, 273 transitions, 1769 flow, removed 4 selfloop flow, removed 4 redundant places. [2023-08-04 02:03:40,869 INFO L231 Difference]: Finished difference. Result has 94 places, 75 transitions, 400 flow [2023-08-04 02:03:40,869 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=831, PETRI_DIFFERENCE_MINUEND_FLOW=276, PETRI_DIFFERENCE_MINUEND_PLACES=76, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=63, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=400, PETRI_PLACES=94, PETRI_TRANSITIONS=75} [2023-08-04 02:03:40,870 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 38 predicate places. [2023-08-04 02:03:40,870 INFO L495 AbstractCegarLoop]: Abstraction has has 94 places, 75 transitions, 400 flow [2023-08-04 02:03:40,870 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 298.8666666666667) internal successors, (4483), 15 states have internal predecessors, (4483), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:03:40,870 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 02:03:40,871 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 02:03:40,878 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2023-08-04 02:03:41,071 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 02:03:41,071 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 02:03:41,071 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 02:03:41,071 INFO L85 PathProgramCache]: Analyzing trace with hash 783087274, now seen corresponding path program 2 times [2023-08-04 02:03:41,072 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 02:03:41,072 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [959991688] [2023-08-04 02:03:41,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 02:03:41,072 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 02:03:41,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 02:03:43,928 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2023-08-04 02:03:43,928 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 02:03:43,929 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [959991688] [2023-08-04 02:03:43,929 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [959991688] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 02:03:43,929 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1573266809] [2023-08-04 02:03:43,929 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-04 02:03:43,929 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 02:03:43,929 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 02:03:43,930 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 02:03:43,936 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2023-08-04 02:03:44,063 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-04 02:03:44,063 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-04 02:03:44,064 INFO L262 TraceCheckSpWp]: Trace formula consists of 235 conjuncts, 13 conjunts are in the unsatisfiable core [2023-08-04 02:03:44,066 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 02:03:45,616 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2023-08-04 02:03:45,616 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 02:03:46,997 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2023-08-04 02:03:46,997 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1573266809] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 02:03:46,997 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 02:03:46,997 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 15 [2023-08-04 02:03:46,997 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1745732429] [2023-08-04 02:03:46,997 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 02:03:46,997 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-08-04 02:03:46,998 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 02:03:46,998 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-08-04 02:03:46,998 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2023-08-04 02:03:48,259 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 292 out of 831 [2023-08-04 02:03:48,261 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 94 places, 75 transitions, 400 flow. Second operand has 15 states, 15 states have (on average 297.6) internal successors, (4464), 15 states have internal predecessors, (4464), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:03:48,261 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 02:03:48,261 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 292 of 831 [2023-08-04 02:03:48,261 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 02:03:52,669 INFO L124 PetriNetUnfolderBase]: 15274/25592 cut-off events. [2023-08-04 02:03:52,670 INFO L125 PetriNetUnfolderBase]: For 77364/77364 co-relation queries the response was YES. [2023-08-04 02:03:52,765 INFO L83 FinitePrefix]: Finished finitePrefix Result has 97773 conditions, 25592 events. 15274/25592 cut-off events. For 77364/77364 co-relation queries the response was YES. Maximal size of possible extension queue 788. Compared 189315 event pairs, 2391 based on Foata normal form. 1/25486 useless extension candidates. Maximal degree in co-relation 97732. Up to 10924 conditions per place. [2023-08-04 02:03:52,806 INFO L140 encePairwiseOnDemand]: 822/831 looper letters, 136 selfloop transitions, 9 changer transitions 74/226 dead transitions. [2023-08-04 02:03:52,806 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 97 places, 226 transitions, 1667 flow [2023-08-04 02:03:52,806 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-08-04 02:03:52,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-08-04 02:03:52,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 2530 transitions. [2023-08-04 02:03:52,809 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3805655836341757 [2023-08-04 02:03:52,809 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 2530 transitions. [2023-08-04 02:03:52,809 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 2530 transitions. [2023-08-04 02:03:52,810 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 02:03:52,810 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 2530 transitions. [2023-08-04 02:03:52,813 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 316.25) internal successors, (2530), 8 states have internal predecessors, (2530), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:03:52,816 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 831.0) internal successors, (7479), 9 states have internal predecessors, (7479), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:03:52,816 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 831.0) internal successors, (7479), 9 states have internal predecessors, (7479), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:03:52,817 INFO L175 Difference]: Start difference. First operand has 94 places, 75 transitions, 400 flow. Second operand 8 states and 2530 transitions. [2023-08-04 02:03:52,817 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 97 places, 226 transitions, 1667 flow [2023-08-04 02:03:53,268 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 95 places, 226 transitions, 1659 flow, removed 4 selfloop flow, removed 2 redundant places. [2023-08-04 02:03:53,271 INFO L231 Difference]: Finished difference. Result has 99 places, 73 transitions, 428 flow [2023-08-04 02:03:53,271 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=831, PETRI_DIFFERENCE_MINUEND_FLOW=396, PETRI_DIFFERENCE_MINUEND_PLACES=88, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=75, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=66, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=428, PETRI_PLACES=99, PETRI_TRANSITIONS=73} [2023-08-04 02:03:53,271 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 43 predicate places. [2023-08-04 02:03:53,272 INFO L495 AbstractCegarLoop]: Abstraction has has 99 places, 73 transitions, 428 flow [2023-08-04 02:03:53,272 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 297.6) internal successors, (4464), 15 states have internal predecessors, (4464), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:03:53,272 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 02:03:53,272 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 02:03:53,280 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2023-08-04 02:03:53,473 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 02:03:53,473 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 02:03:53,473 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 02:03:53,473 INFO L85 PathProgramCache]: Analyzing trace with hash -1417154900, now seen corresponding path program 1 times [2023-08-04 02:03:53,473 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 02:03:53,473 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [910263946] [2023-08-04 02:03:53,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 02:03:53,474 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 02:03:53,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 02:03:54,206 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 2 proven. 14 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2023-08-04 02:03:54,206 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 02:03:54,206 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [910263946] [2023-08-04 02:03:54,207 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [910263946] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 02:03:54,207 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [14175178] [2023-08-04 02:03:54,207 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 02:03:54,207 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 02:03:54,207 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 02:03:54,208 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 02:03:54,232 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2023-08-04 02:03:54,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 02:03:54,344 INFO L262 TraceCheckSpWp]: Trace formula consists of 235 conjuncts, 13 conjunts are in the unsatisfiable core [2023-08-04 02:03:54,347 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 02:03:56,607 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2023-08-04 02:03:56,607 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 02:03:57,853 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2023-08-04 02:03:57,854 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [14175178] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 02:03:57,854 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 02:03:57,854 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 6, 6] total 19 [2023-08-04 02:03:57,854 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1352401824] [2023-08-04 02:03:57,854 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 02:03:57,854 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-08-04 02:03:57,855 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 02:03:57,855 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-08-04 02:03:57,856 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=300, Unknown=0, NotChecked=0, Total=342 [2023-08-04 02:04:00,232 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 288 out of 831 [2023-08-04 02:04:00,234 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 99 places, 73 transitions, 428 flow. Second operand has 19 states, 19 states have (on average 293.94736842105266) internal successors, (5585), 19 states have internal predecessors, (5585), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:04:00,234 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 02:04:00,234 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 288 of 831 [2023-08-04 02:04:00,234 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 02:04:07,960 INFO L124 PetriNetUnfolderBase]: 18158/30800 cut-off events. [2023-08-04 02:04:07,961 INFO L125 PetriNetUnfolderBase]: For 141894/141894 co-relation queries the response was YES. [2023-08-04 02:04:08,077 INFO L83 FinitePrefix]: Finished finitePrefix Result has 129708 conditions, 30800 events. 18158/30800 cut-off events. For 141894/141894 co-relation queries the response was YES. Maximal size of possible extension queue 956. Compared 237611 event pairs, 3130 based on Foata normal form. 113/30893 useless extension candidates. Maximal degree in co-relation 129667. Up to 10984 conditions per place. [2023-08-04 02:04:08,123 INFO L140 encePairwiseOnDemand]: 812/831 looper letters, 224 selfloop transitions, 87 changer transitions 18/334 dead transitions. [2023-08-04 02:04:08,123 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 119 places, 334 transitions, 2893 flow [2023-08-04 02:04:08,123 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2023-08-04 02:04:08,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2023-08-04 02:04:08,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 7469 transitions. [2023-08-04 02:04:08,131 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35951865222623347 [2023-08-04 02:04:08,131 INFO L72 ComplementDD]: Start complementDD. Operand 25 states and 7469 transitions. [2023-08-04 02:04:08,131 INFO L73 IsDeterministic]: Start isDeterministic. Operand 25 states and 7469 transitions. [2023-08-04 02:04:08,133 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 02:04:08,133 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 25 states and 7469 transitions. [2023-08-04 02:04:08,139 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 26 states, 25 states have (on average 298.76) internal successors, (7469), 25 states have internal predecessors, (7469), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:04:08,151 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 26 states, 26 states have (on average 831.0) internal successors, (21606), 26 states have internal predecessors, (21606), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:04:08,152 INFO L81 ComplementDD]: Finished complementDD. Result has 26 states, 26 states have (on average 831.0) internal successors, (21606), 26 states have internal predecessors, (21606), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:04:08,152 INFO L175 Difference]: Start difference. First operand has 99 places, 73 transitions, 428 flow. Second operand 25 states and 7469 transitions. [2023-08-04 02:04:08,152 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 119 places, 334 transitions, 2893 flow [2023-08-04 02:04:08,827 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 114 places, 334 transitions, 2667 flow, removed 89 selfloop flow, removed 5 redundant places. [2023-08-04 02:04:08,830 INFO L231 Difference]: Finished difference. Result has 130 places, 151 transitions, 1378 flow [2023-08-04 02:04:08,830 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=831, PETRI_DIFFERENCE_MINUEND_FLOW=396, PETRI_DIFFERENCE_MINUEND_PLACES=90, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=73, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=25, PETRI_FLOW=1378, PETRI_PLACES=130, PETRI_TRANSITIONS=151} [2023-08-04 02:04:08,830 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 74 predicate places. [2023-08-04 02:04:08,830 INFO L495 AbstractCegarLoop]: Abstraction has has 130 places, 151 transitions, 1378 flow [2023-08-04 02:04:08,831 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 293.94736842105266) internal successors, (5585), 19 states have internal predecessors, (5585), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:04:08,831 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 02:04:08,831 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 02:04:08,837 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2023-08-04 02:04:09,031 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 02:04:09,032 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 02:04:09,032 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 02:04:09,032 INFO L85 PathProgramCache]: Analyzing trace with hash -2105822562, now seen corresponding path program 2 times [2023-08-04 02:04:09,032 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 02:04:09,032 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [968273695] [2023-08-04 02:04:09,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 02:04:09,032 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 02:04:09,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 02:04:11,260 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 02:04:11,260 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 02:04:11,261 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [968273695] [2023-08-04 02:04:11,261 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [968273695] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 02:04:11,261 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1351307258] [2023-08-04 02:04:11,261 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-04 02:04:11,261 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 02:04:11,261 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 02:04:11,262 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 02:04:11,264 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2023-08-04 02:04:11,379 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-04 02:04:11,379 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-04 02:04:11,380 INFO L262 TraceCheckSpWp]: Trace formula consists of 235 conjuncts, 13 conjunts are in the unsatisfiable core [2023-08-04 02:04:11,383 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 02:04:13,580 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 02:04:13,580 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 02:04:15,900 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 02:04:15,900 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1351307258] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 02:04:15,900 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 02:04:15,900 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 15 [2023-08-04 02:04:15,901 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1055331504] [2023-08-04 02:04:15,901 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 02:04:15,901 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-08-04 02:04:15,901 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 02:04:15,901 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-08-04 02:04:15,901 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2023-08-04 02:04:17,258 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 298 out of 831 [2023-08-04 02:04:17,260 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 130 places, 151 transitions, 1378 flow. Second operand has 15 states, 15 states have (on average 303.6666666666667) internal successors, (4555), 15 states have internal predecessors, (4555), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:04:17,260 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 02:04:17,260 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 298 of 831 [2023-08-04 02:04:17,260 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 02:04:23,774 INFO L124 PetriNetUnfolderBase]: 18377/32436 cut-off events. [2023-08-04 02:04:23,774 INFO L125 PetriNetUnfolderBase]: For 301744/303333 co-relation queries the response was YES. [2023-08-04 02:04:23,958 INFO L83 FinitePrefix]: Finished finitePrefix Result has 174808 conditions, 32436 events. 18377/32436 cut-off events. For 301744/303333 co-relation queries the response was YES. Maximal size of possible extension queue 1076. Compared 266362 event pairs, 3893 based on Foata normal form. 263/32610 useless extension candidates. Maximal degree in co-relation 174754. Up to 18097 conditions per place. [2023-08-04 02:04:24,000 INFO L140 encePairwiseOnDemand]: 822/831 looper letters, 126 selfloop transitions, 23 changer transitions 112/271 dead transitions. [2023-08-04 02:04:24,000 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 135 places, 271 transitions, 2668 flow [2023-08-04 02:04:24,000 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-04 02:04:24,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-04 02:04:24,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 2254 transitions. [2023-08-04 02:04:24,002 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38748495788206977 [2023-08-04 02:04:24,002 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 2254 transitions. [2023-08-04 02:04:24,002 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 2254 transitions. [2023-08-04 02:04:24,003 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 02:04:24,003 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 2254 transitions. [2023-08-04 02:04:24,004 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 322.0) internal successors, (2254), 7 states have internal predecessors, (2254), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:04:24,008 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 831.0) internal successors, (6648), 8 states have internal predecessors, (6648), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:04:24,008 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 831.0) internal successors, (6648), 8 states have internal predecessors, (6648), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:04:24,008 INFO L175 Difference]: Start difference. First operand has 130 places, 151 transitions, 1378 flow. Second operand 7 states and 2254 transitions. [2023-08-04 02:04:24,008 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 135 places, 271 transitions, 2668 flow [2023-08-04 02:04:25,179 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 128 places, 271 transitions, 2540 flow, removed 43 selfloop flow, removed 7 redundant places. [2023-08-04 02:04:25,181 INFO L231 Difference]: Finished difference. Result has 131 places, 101 transitions, 823 flow [2023-08-04 02:04:25,181 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=831, PETRI_DIFFERENCE_MINUEND_FLOW=1266, PETRI_DIFFERENCE_MINUEND_PLACES=122, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=151, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=128, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=823, PETRI_PLACES=131, PETRI_TRANSITIONS=101} [2023-08-04 02:04:25,182 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 75 predicate places. [2023-08-04 02:04:25,182 INFO L495 AbstractCegarLoop]: Abstraction has has 131 places, 101 transitions, 823 flow [2023-08-04 02:04:25,182 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 303.6666666666667) internal successors, (4555), 15 states have internal predecessors, (4555), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:04:25,182 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 02:04:25,182 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 02:04:25,189 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 02:04:25,382 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,SelfDestructingSolverStorable23 [2023-08-04 02:04:25,383 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 02:04:25,383 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 02:04:25,383 INFO L85 PathProgramCache]: Analyzing trace with hash 70115738, now seen corresponding path program 1 times [2023-08-04 02:04:25,384 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 02:04:25,384 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [310683996] [2023-08-04 02:04:25,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 02:04:25,384 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 02:04:25,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 02:04:27,509 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2023-08-04 02:04:27,510 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 02:04:27,510 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [310683996] [2023-08-04 02:04:27,510 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [310683996] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 02:04:27,510 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [873374614] [2023-08-04 02:04:27,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 02:04:27,510 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 02:04:27,510 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 02:04:27,511 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 02:04:27,513 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 02:04:27,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 02:04:27,634 INFO L262 TraceCheckSpWp]: Trace formula consists of 235 conjuncts, 13 conjunts are in the unsatisfiable core [2023-08-04 02:04:27,636 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 02:04:29,646 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2023-08-04 02:04:29,646 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 02:04:30,929 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2023-08-04 02:04:30,929 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [873374614] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 02:04:30,929 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 02:04:30,929 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 15 [2023-08-04 02:04:30,929 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [320035043] [2023-08-04 02:04:30,930 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 02:04:30,930 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-08-04 02:04:30,930 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 02:04:30,930 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-08-04 02:04:30,930 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2023-08-04 02:04:32,158 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 298 out of 831 [2023-08-04 02:04:32,161 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 131 places, 101 transitions, 823 flow. Second operand has 15 states, 15 states have (on average 303.8666666666667) internal successors, (4558), 15 states have internal predecessors, (4558), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:04:32,161 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 02:04:32,161 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 298 of 831 [2023-08-04 02:04:32,161 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 02:04:35,230 INFO L124 PetriNetUnfolderBase]: 8190/15279 cut-off events. [2023-08-04 02:04:35,230 INFO L125 PetriNetUnfolderBase]: For 131533/132165 co-relation queries the response was YES. [2023-08-04 02:04:35,293 INFO L83 FinitePrefix]: Finished finitePrefix Result has 81068 conditions, 15279 events. 8190/15279 cut-off events. For 131533/132165 co-relation queries the response was YES. Maximal size of possible extension queue 557. Compared 121868 event pairs, 1130 based on Foata normal form. 178/15389 useless extension candidates. Maximal degree in co-relation 81017. Up to 6963 conditions per place. [2023-08-04 02:04:35,315 INFO L140 encePairwiseOnDemand]: 822/831 looper letters, 119 selfloop transitions, 27 changer transitions 10/166 dead transitions. [2023-08-04 02:04:35,315 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 127 places, 166 transitions, 1528 flow [2023-08-04 02:04:35,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-04 02:04:35,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-04 02:04:35,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 2202 transitions. [2023-08-04 02:04:35,317 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37854564208354824 [2023-08-04 02:04:35,317 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 2202 transitions. [2023-08-04 02:04:35,317 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 2202 transitions. [2023-08-04 02:04:35,317 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 02:04:35,318 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 2202 transitions. [2023-08-04 02:04:35,319 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 314.57142857142856) internal successors, (2202), 7 states have internal predecessors, (2202), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:04:35,322 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 831.0) internal successors, (6648), 8 states have internal predecessors, (6648), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:04:35,322 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 831.0) internal successors, (6648), 8 states have internal predecessors, (6648), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:04:35,322 INFO L175 Difference]: Start difference. First operand has 131 places, 101 transitions, 823 flow. Second operand 7 states and 2202 transitions. [2023-08-04 02:04:35,322 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 127 places, 166 transitions, 1528 flow [2023-08-04 02:04:35,948 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 114 places, 166 transitions, 1396 flow, removed 49 selfloop flow, removed 13 redundant places. [2023-08-04 02:04:35,950 INFO L231 Difference]: Finished difference. Result has 117 places, 103 transitions, 837 flow [2023-08-04 02:04:35,950 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=831, PETRI_DIFFERENCE_MINUEND_FLOW=719, PETRI_DIFFERENCE_MINUEND_PLACES=108, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=101, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=74, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=837, PETRI_PLACES=117, PETRI_TRANSITIONS=103} [2023-08-04 02:04:35,950 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 61 predicate places. [2023-08-04 02:04:35,951 INFO L495 AbstractCegarLoop]: Abstraction has has 117 places, 103 transitions, 837 flow [2023-08-04 02:04:35,951 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 303.8666666666667) internal successors, (4558), 15 states have internal predecessors, (4558), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:04:35,951 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 02:04:35,951 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 02:04:35,956 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 02:04:36,152 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,SelfDestructingSolverStorable24 [2023-08-04 02:04:36,152 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 02:04:36,152 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 02:04:36,152 INFO L85 PathProgramCache]: Analyzing trace with hash 1038677884, now seen corresponding path program 1 times [2023-08-04 02:04:36,152 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 02:04:36,152 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1060170013] [2023-08-04 02:04:36,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 02:04:36,153 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 02:04:36,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 02:04:36,664 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 4 proven. 10 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2023-08-04 02:04:36,665 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 02:04:36,665 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1060170013] [2023-08-04 02:04:36,665 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1060170013] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 02:04:36,665 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1930073156] [2023-08-04 02:04:36,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 02:04:36,665 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 02:04:36,665 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 02:04:36,666 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 02:04:36,677 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 02:04:36,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 02:04:36,812 INFO L262 TraceCheckSpWp]: Trace formula consists of 235 conjuncts, 13 conjunts are in the unsatisfiable core [2023-08-04 02:04:36,815 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 02:04:39,234 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2023-08-04 02:04:39,234 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 02:04:41,236 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2023-08-04 02:04:41,236 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1930073156] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 02:04:41,236 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 02:04:41,237 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 6, 6] total 20 [2023-08-04 02:04:41,237 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [291467730] [2023-08-04 02:04:41,237 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 02:04:41,237 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-08-04 02:04:41,237 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 02:04:41,237 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-08-04 02:04:41,237 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=327, Unknown=0, NotChecked=0, Total=380 [2023-08-04 02:04:43,359 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 293 out of 831 [2023-08-04 02:04:43,363 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 117 places, 103 transitions, 837 flow. Second operand has 20 states, 20 states have (on average 298.55) internal successors, (5971), 20 states have internal predecessors, (5971), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:04:43,363 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 02:04:43,363 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 293 of 831 [2023-08-04 02:04:43,363 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 02:04:49,345 INFO L124 PetriNetUnfolderBase]: 7683/14772 cut-off events. [2023-08-04 02:04:49,346 INFO L125 PetriNetUnfolderBase]: For 114123/114645 co-relation queries the response was YES. [2023-08-04 02:04:49,397 INFO L83 FinitePrefix]: Finished finitePrefix Result has 77333 conditions, 14772 events. 7683/14772 cut-off events. For 114123/114645 co-relation queries the response was YES. Maximal size of possible extension queue 559. Compared 121113 event pairs, 877 based on Foata normal form. 157/14849 useless extension candidates. Maximal degree in co-relation 77298. Up to 6008 conditions per place. [2023-08-04 02:04:49,409 INFO L140 encePairwiseOnDemand]: 810/831 looper letters, 0 selfloop transitions, 0 changer transitions 258/258 dead transitions. [2023-08-04 02:04:49,409 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 141 places, 258 transitions, 2822 flow [2023-08-04 02:04:49,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2023-08-04 02:04:49,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2023-08-04 02:04:49,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 8396 transitions. [2023-08-04 02:04:49,416 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3608389204057074 [2023-08-04 02:04:49,416 INFO L72 ComplementDD]: Start complementDD. Operand 28 states and 8396 transitions. [2023-08-04 02:04:49,416 INFO L73 IsDeterministic]: Start isDeterministic. Operand 28 states and 8396 transitions. [2023-08-04 02:04:49,417 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 02:04:49,417 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 28 states and 8396 transitions. [2023-08-04 02:04:49,423 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 29 states, 28 states have (on average 299.85714285714283) internal successors, (8396), 28 states have internal predecessors, (8396), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:04:49,433 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 29 states, 29 states have (on average 831.0) internal successors, (24099), 29 states have internal predecessors, (24099), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:04:49,434 INFO L81 ComplementDD]: Finished complementDD. Result has 29 states, 29 states have (on average 831.0) internal successors, (24099), 29 states have internal predecessors, (24099), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:04:49,434 INFO L175 Difference]: Start difference. First operand has 117 places, 103 transitions, 837 flow. Second operand 28 states and 8396 transitions. [2023-08-04 02:04:49,434 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 141 places, 258 transitions, 2822 flow [2023-08-04 02:04:49,687 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 136 places, 258 transitions, 2632 flow, removed 41 selfloop flow, removed 5 redundant places. [2023-08-04 02:04:49,689 INFO L231 Difference]: Finished difference. Result has 136 places, 0 transitions, 0 flow [2023-08-04 02:04:49,689 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=831, PETRI_DIFFERENCE_MINUEND_FLOW=767, PETRI_DIFFERENCE_MINUEND_PLACES=109, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=101, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=101, PETRI_DIFFERENCE_SUBTRAHEND_STATES=28, PETRI_FLOW=0, PETRI_PLACES=136, PETRI_TRANSITIONS=0} [2023-08-04 02:04:49,689 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 80 predicate places. [2023-08-04 02:04:49,689 INFO L495 AbstractCegarLoop]: Abstraction has has 136 places, 0 transitions, 0 flow [2023-08-04 02:04:49,690 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 298.55) internal successors, (5971), 20 states have internal predecessors, (5971), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:04:49,690 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2023-08-04 02:04:49,695 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 02:04:49,891 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2023-08-04 02:04:49,891 INFO L445 BasicCegarLoop]: Path program histogram: [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 02:04:49,892 INFO L307 ceAbstractionStarter]: Result for error location AllErrorsAtOnce was SAFE (2/2) [2023-08-04 02:04:49,892 INFO L228 ceAbstractionStarter]: Analysis of concurrent program completed with 2 thread instances [2023-08-04 02:04:49,892 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2023-08-04 02:04:49,895 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 04.08 02:04:49 BasicIcfg [2023-08-04 02:04:49,895 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-08-04 02:04:49,895 INFO L158 Benchmark]: Toolchain (without parser) took 160610.83ms. Allocated memory was 528.5MB in the beginning and 5.1GB in the end (delta: 4.6GB). Free memory was 488.8MB in the beginning and 3.0GB in the end (delta: -2.5GB). Peak memory consumption was 2.0GB. Max. memory is 16.0GB. [2023-08-04 02:04:49,895 INFO L158 Benchmark]: CDTParser took 0.08ms. Allocated memory is still 337.6MB. Free memory is still 288.4MB. There was no memory consumed. Max. memory is 16.0GB. [2023-08-04 02:04:49,895 INFO L158 Benchmark]: CACSL2BoogieTranslator took 178.86ms. Allocated memory is still 528.5MB. Free memory was 488.5MB in the beginning and 476.7MB in the end (delta: 11.8MB). Peak memory consumption was 10.5MB. Max. memory is 16.0GB. [2023-08-04 02:04:49,896 INFO L158 Benchmark]: Boogie Procedure Inliner took 29.35ms. Allocated memory is still 528.5MB. Free memory was 476.7MB in the beginning and 474.5MB in the end (delta: 2.3MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. [2023-08-04 02:04:49,896 INFO L158 Benchmark]: Boogie Preprocessor took 29.56ms. Allocated memory is still 528.5MB. Free memory was 474.5MB in the beginning and 472.5MB in the end (delta: 2.0MB). There was no memory consumed. Max. memory is 16.0GB. [2023-08-04 02:04:49,896 INFO L158 Benchmark]: RCFGBuilder took 412.74ms. Allocated memory is still 528.5MB. Free memory was 472.5MB in the beginning and 451.1MB in the end (delta: 21.4MB). Peak memory consumption was 23.1MB. Max. memory is 16.0GB. [2023-08-04 02:04:49,896 INFO L158 Benchmark]: TraceAbstraction took 159956.27ms. Allocated memory was 528.5MB in the beginning and 5.1GB in the end (delta: 4.6GB). Free memory was 450.4MB in the beginning and 3.0GB in the end (delta: -2.6GB). Peak memory consumption was 2.0GB. Max. memory is 16.0GB. [2023-08-04 02:04:49,897 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.08ms. Allocated memory is still 337.6MB. Free memory is still 288.4MB. There was no memory consumed. Max. memory is 16.0GB. * CACSL2BoogieTranslator took 178.86ms. Allocated memory is still 528.5MB. Free memory was 488.5MB in the beginning and 476.7MB in the end (delta: 11.8MB). Peak memory consumption was 10.5MB. Max. memory is 16.0GB. * Boogie Procedure Inliner took 29.35ms. Allocated memory is still 528.5MB. Free memory was 476.7MB in the beginning and 474.5MB in the end (delta: 2.3MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. * Boogie Preprocessor took 29.56ms. Allocated memory is still 528.5MB. Free memory was 474.5MB in the beginning and 472.5MB in the end (delta: 2.0MB). There was no memory consumed. Max. memory is 16.0GB. * RCFGBuilder took 412.74ms. Allocated memory is still 528.5MB. Free memory was 472.5MB in the beginning and 451.1MB in the end (delta: 21.4MB). Peak memory consumption was 23.1MB. Max. memory is 16.0GB. * TraceAbstraction took 159956.27ms. Allocated memory was 528.5MB in the beginning and 5.1GB in the end (delta: 4.6GB). Free memory was 450.4MB in the beginning and 3.0GB in the end (delta: -2.6GB). Peak memory consumption was 2.0GB. Max. memory is 16.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 6.0s, 236 PlacesBefore, 41 PlacesAfterwards, 261 TransitionsBefore, 44 TransitionsAfterwards, 28548 CoEnabledTransitionPairs, 8 FixpointIterations, 42 TrivialSequentialCompositions, 151 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 74 ConcurrentYvCompositions, 22 ChoiceCompositions, 289 TotalNumberOfCompositions, 31843 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 30869, independent: 30817, independent conditional: 0, independent unconditional: 30817, dependent: 52, dependent conditional: 0, dependent unconditional: 52, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: SyntacticIndependenceRelation.Independence Queries: [ total: 17016, independent: 16991, independent conditional: 0, independent unconditional: 16991, dependent: 25, dependent conditional: 0, dependent unconditional: 25, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Cache Queries: [ total: 30869, independent: 13826, independent conditional: 0, independent unconditional: 13826, dependent: 27, dependent conditional: 0, dependent unconditional: 27, unknown: 17016, unknown conditional: 0, unknown unconditional: 17016] , 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: 9.6s, 347 PlacesBefore, 56 PlacesAfterwards, 390 TransitionsBefore, 62 TransitionsAfterwards, 89388 CoEnabledTransitionPairs, 8 FixpointIterations, 42 TrivialSequentialCompositions, 238 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 133 ConcurrentYvCompositions, 37 ChoiceCompositions, 450 TotalNumberOfCompositions, 110186 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 106462, independent: 106379, independent conditional: 0, independent unconditional: 106379, dependent: 83, dependent conditional: 0, dependent unconditional: 83, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: SyntacticIndependenceRelation.Independence Queries: [ total: 53771, independent: 53723, independent conditional: 0, independent unconditional: 53723, dependent: 48, dependent conditional: 0, dependent unconditional: 48, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Cache Queries: [ total: 106462, independent: 52656, independent conditional: 0, independent unconditional: 52656, dependent: 35, dependent conditional: 0, dependent unconditional: 35, unknown: 53771, unknown conditional: 0, unknown unconditional: 53771] , Statistics on independence cache: Total cache size (in pairs): 215, Positive cache size: 210, Positive conditional cache size: 0, Positive unconditional cache size: 210, 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: 9.4s, 347 PlacesBefore, 56 PlacesAfterwards, 390 TransitionsBefore, 62 TransitionsAfterwards, 89388 CoEnabledTransitionPairs, 7 FixpointIterations, 42 TrivialSequentialCompositions, 234 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 128 ConcurrentYvCompositions, 37 ChoiceCompositions, 441 TotalNumberOfCompositions, 107399 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 103477, independent: 103411, independent conditional: 0, independent unconditional: 103411, dependent: 66, dependent conditional: 0, dependent unconditional: 66, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: SyntacticIndependenceRelation.Independence Queries: [ total: 53251, independent: 53210, independent conditional: 0, independent unconditional: 53210, dependent: 41, dependent conditional: 0, dependent unconditional: 41, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Cache Queries: [ total: 103477, independent: 50201, independent conditional: 0, independent unconditional: 50201, dependent: 25, dependent conditional: 0, dependent unconditional: 25, unknown: 53251, unknown conditional: 0, unknown unconditional: 53251] , Statistics on independence cache: Total cache size (in pairs): 193, Positive cache size: 188, Positive conditional cache size: 0, Positive unconditional cache size: 188, 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 - PositiveResult [Line: 81]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data for thread instance sufficiency with 1 thread instances CFG has 7 procedures, 335 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: 6.4s, OverallIterations: 1, TraceHistogramMax: 2, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 0.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 6.2s, 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, 440 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: 6.6s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 10.6s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 268 SdHoareTripleChecker+Valid, 0.4s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 209 mSDsluCounter, 10 SdHoareTripleChecker+Invalid, 0.3s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 0 mSDsCounter, 26 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 505 IncrementalHoareTripleChecker+Invalid, 531 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 26 mSolverCounterUnsat, 10 mSDtfsCounter, 505 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, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=214occurred in iteration=0, InterpolantAutomatonStates: 29, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.5s InterpolantComputationTime, 235 NumberOfCodeBlocks, 235 NumberOfCodeBlocksAsserted, 12 NumberOfCheckSat, 262 ConstructedInterpolants, 0 QuantifiedInterpolants, 434 SizeOfPredicates, 0 NumberOfNonLiveVariables, 698 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 - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 10 procedures, 440 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: 134.2s, OverallIterations: 18, TraceHistogramMax: 2, PathProgramHistogramMax: 2, EmptinessCheckTime: 0.0s, AutomataDifference: 83.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 10.3s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 7262 SdHoareTripleChecker+Valid, 14.9s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 6655 mSDsluCounter, 18191 SdHoareTripleChecker+Invalid, 13.1s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 17947 mSDsCounter, 316 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 21658 IncrementalHoareTripleChecker+Invalid, 21974 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 316 mSolverCounterUnsat, 244 mSDtfsCounter, 21658 mSolverCounterSat, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 1593 GetRequests, 1348 SyntacticMatches, 56 SemanticMatches, 189 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1107 ImplicationChecksByTransitivity, 12.5s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=1378occurred in iteration=15, InterpolantAutomatonStates: 127, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.3s SsaConstructionTime, 1.0s SatisfiabilityAnalysisTime, 34.9s InterpolantComputationTime, 1538 NumberOfCodeBlocks, 1538 NumberOfCodeBlocksAsserted, 37 NumberOfCheckSat, 2148 ConstructedInterpolants, 0 QuantifiedInterpolants, 47492 SizeOfPredicates, 354 NumberOfNonLiveVariables, 3281 ConjunctsInSsa, 106 ConjunctsInUnsatCore, 47 InterpolantComputations, 6 PerfectInterpolantSequences, 845/948 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 - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2023-08-04 02:04:49,919 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...