/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-match-symm.wvr_bound2.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-19404b3-m [2023-08-04 02:04:53,638 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-08-04 02:04:53,682 INFO L114 SettingsManager]: Loading settings from /storage/repos/CAV22/benchmarks/svcomp-Reach-32bit-Automizer_Default.epf [2023-08-04 02:04:53,685 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-08-04 02:04:53,685 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-08-04 02:04:53,685 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Translation Mode: [2023-08-04 02:04:53,686 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Checked method. Library mode if empty. [2023-08-04 02:04:53,708 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-04 02:04:53,709 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-04 02:04:53,709 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-04 02:04:53,709 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-04 02:04:53,710 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-04 02:04:53,710 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-04 02:04:53,710 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-08-04 02:04:53,711 INFO L153 SettingsManager]: * Use SBE=true [2023-08-04 02:04:53,711 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-04 02:04:53,711 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-04 02:04:53,711 INFO L153 SettingsManager]: * sizeof long=4 [2023-08-04 02:04:53,712 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-04 02:04:53,712 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-08-04 02:04:53,712 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-08-04 02:04:53,718 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-04 02:04:53,718 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-04 02:04:53,718 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-04 02:04:53,719 INFO L153 SettingsManager]: * sizeof long double=12 [2023-08-04 02:04:53,719 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-08-04 02:04:53,719 INFO L153 SettingsManager]: * Use constant arrays=true [2023-08-04 02:04:53,719 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-04 02:04:53,720 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-04 02:04:53,720 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-04 02:04:53,720 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-04 02:04:53,720 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-04 02:04:53,721 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-04 02:04:53,721 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-04 02:04:53,721 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-04 02:04:53,721 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-04 02:04:53,722 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-04 02:04:53,722 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-08-04 02:04:53,722 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-04 02:04:53,722 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-04 02:04:53,723 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-04 02:04:53,727 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Order of the error locations to be checked -> INSUFFICIENT_FIRST [2023-08-04 02:04:53,921 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-04 02:04:53,940 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-04 02:04:53,942 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-04 02:04:53,943 INFO L270 PluginConnector]: Initializing CDTParser... [2023-08-04 02:04:53,943 INFO L274 PluginConnector]: CDTParser initialized [2023-08-04 02:04:53,944 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/CAV22/benchmarks/increased_bounds/weaver_chl-match-symm.wvr_bound2.c [2023-08-04 02:04:54,889 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-08-04 02:04:55,077 INFO L384 CDTParser]: Found 1 translation units. [2023-08-04 02:04:55,078 INFO L180 CDTParser]: Scanning /storage/repos/CAV22/benchmarks/increased_bounds/weaver_chl-match-symm.wvr_bound2.c [2023-08-04 02:04:55,083 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5902c1749/f66529b5239642d99ed9a03a24b66e9e/FLAG9412f4102 [2023-08-04 02:04:55,098 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5902c1749/f66529b5239642d99ed9a03a24b66e9e [2023-08-04 02:04:55,103 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-04 02:04:55,104 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-08-04 02:04:55,107 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-04 02:04:55,107 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-04 02:04:55,109 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-04 02:04:55,110 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.08 02:04:55" (1/1) ... [2023-08-04 02:04:55,110 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@70bfb593 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 02:04:55, skipping insertion in model container [2023-08-04 02:04:55,111 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.08 02:04:55" (1/1) ... [2023-08-04 02:04:55,133 INFO L176 MainTranslator]: Built tables and reachable declarations [2023-08-04 02:04:55,258 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/CAV22/benchmarks/increased_bounds/weaver_chl-match-symm.wvr_bound2.c[2746,2759] [2023-08-04 02:04:55,260 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-04 02:04:55,266 INFO L201 MainTranslator]: Completed pre-run [2023-08-04 02:04:55,282 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/CAV22/benchmarks/increased_bounds/weaver_chl-match-symm.wvr_bound2.c[2746,2759] [2023-08-04 02:04:55,283 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-04 02:04:55,292 INFO L206 MainTranslator]: Completed translation [2023-08-04 02:04:55,292 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 02:04:55 WrapperNode [2023-08-04 02:04:55,292 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-04 02:04:55,293 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-04 02:04:55,293 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-04 02:04:55,293 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-04 02:04:55,297 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 02:04:55" (1/1) ... [2023-08-04 02:04:55,303 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 02:04:55" (1/1) ... [2023-08-04 02:04:55,319 INFO L138 Inliner]: procedures = 22, calls = 27, calls flagged for inlining = 11, calls inlined = 17, statements flattened = 186 [2023-08-04 02:04:55,319 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-04 02:04:55,319 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-04 02:04:55,319 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-04 02:04:55,320 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-08-04 02:04:55,325 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 02:04:55" (1/1) ... [2023-08-04 02:04:55,325 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 02:04:55" (1/1) ... [2023-08-04 02:04:55,327 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 02:04:55" (1/1) ... [2023-08-04 02:04:55,328 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 02:04:55" (1/1) ... [2023-08-04 02:04:55,332 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 02:04:55" (1/1) ... [2023-08-04 02:04:55,335 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 02:04:55" (1/1) ... [2023-08-04 02:04:55,336 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 02:04:55" (1/1) ... [2023-08-04 02:04:55,337 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 02:04:55" (1/1) ... [2023-08-04 02:04:55,338 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-04 02:04:55,339 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-04 02:04:55,339 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-08-04 02:04:55,339 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-08-04 02:04:55,345 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 02:04:55" (1/1) ... [2023-08-04 02:04:55,349 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-04 02:04:55,358 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 02:04:55,374 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 02:04:55,391 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 02:04:55,402 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-04 02:04:55,402 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-08-04 02:04:55,402 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-08-04 02:04:55,402 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-08-04 02:04:55,402 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-08-04 02:04:55,402 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-04 02:04:55,403 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-04 02:04:55,403 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-04 02:04:55,403 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-04 02:04:55,403 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-04 02:04:55,403 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-04 02:04:55,404 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-04 02:04:55,405 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 02:04:55,493 INFO L236 CfgBuilder]: Building ICFG [2023-08-04 02:04:55,495 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-04 02:04:55,772 INFO L277 CfgBuilder]: Performing block encoding [2023-08-04 02:04:55,778 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-04 02:04:55,778 INFO L302 CfgBuilder]: Removed 4 assume(true) statements. [2023-08-04 02:04:55,780 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.08 02:04:55 BoogieIcfgContainer [2023-08-04 02:04:55,780 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-04 02:04:55,781 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-04 02:04:55,782 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-08-04 02:04:55,783 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-08-04 02:04:55,784 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 04.08 02:04:55" (1/3) ... [2023-08-04 02:04:55,784 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1e0af032 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.08 02:04:55, skipping insertion in model container [2023-08-04 02:04:55,784 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 02:04:55" (2/3) ... [2023-08-04 02:04:55,784 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1e0af032 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.08 02:04:55, skipping insertion in model container [2023-08-04 02:04:55,784 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.08 02:04:55" (3/3) ... [2023-08-04 02:04:55,785 INFO L112 eAbstractionObserver]: Analyzing ICFG weaver_chl-match-symm.wvr_bound2.c [2023-08-04 02:04:55,790 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-08-04 02:04:55,797 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-04 02:04:55,797 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-08-04 02:04:55,798 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-04 02:04:55,868 INFO L144 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2023-08-04 02:04:55,892 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 201 places, 215 transitions, 452 flow [2023-08-04 02:04:56,006 INFO L124 PetriNetUnfolderBase]: 46/428 cut-off events. [2023-08-04 02:04:56,006 INFO L125 PetriNetUnfolderBase]: For 8/16 co-relation queries the response was YES. [2023-08-04 02:04:56,019 INFO L83 FinitePrefix]: Finished finitePrefix Result has 448 conditions, 428 events. 46/428 cut-off events. For 8/16 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 1603 event pairs, 0 based on Foata normal form. 0/370 useless extension candidates. Maximal degree in co-relation 216. Up to 8 conditions per place. [2023-08-04 02:04:56,019 INFO L82 GeneralOperation]: Start removeDead. Operand has 201 places, 215 transitions, 452 flow [2023-08-04 02:04:56,024 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 201 places, 215 transitions, 452 flow [2023-08-04 02:04:56,026 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-04 02:04:56,031 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 201 places, 215 transitions, 452 flow [2023-08-04 02:04:56,036 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 201 places, 215 transitions, 452 flow [2023-08-04 02:04:56,036 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 201 places, 215 transitions, 452 flow [2023-08-04 02:04:56,089 INFO L124 PetriNetUnfolderBase]: 46/428 cut-off events. [2023-08-04 02:04:56,089 INFO L125 PetriNetUnfolderBase]: For 8/16 co-relation queries the response was YES. [2023-08-04 02:04:56,094 INFO L83 FinitePrefix]: Finished finitePrefix Result has 448 conditions, 428 events. 46/428 cut-off events. For 8/16 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 1603 event pairs, 0 based on Foata normal form. 0/370 useless extension candidates. Maximal degree in co-relation 216. Up to 8 conditions per place. [2023-08-04 02:04:56,104 INFO L119 LiptonReduction]: Number of co-enabled transitions 17014 [2023-08-04 02:05:00,891 INFO L134 LiptonReduction]: Checked pairs total: 16783 [2023-08-04 02:05:00,891 INFO L136 LiptonReduction]: Total number of compositions: 234 [2023-08-04 02:05:00,901 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-04 02:05:00,905 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;@365da651, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-04 02:05:00,905 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2023-08-04 02:05:00,910 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-04 02:05:00,910 INFO L124 PetriNetUnfolderBase]: 1/26 cut-off events. [2023-08-04 02:05:00,910 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 02:05:00,910 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 02:05:00,910 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2023-08-04 02:05:00,911 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-04 02:05:00,914 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 02:05:00,914 INFO L85 PathProgramCache]: Analyzing trace with hash -54955259, now seen corresponding path program 1 times [2023-08-04 02:05:00,920 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 02:05:00,920 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [190107509] [2023-08-04 02:05:00,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 02:05:00,921 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 02:05:00,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-04 02:05:00,993 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-04 02:05:01,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-04 02:05:01,020 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-04 02:05:01,022 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-04 02:05:01,023 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2023-08-04 02:05:01,024 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 2 remaining) [2023-08-04 02:05:01,024 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-04 02:05:01,024 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-04 02:05:01,026 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE,UNKNOWN (1/2) [2023-08-04 02:05:01,027 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-04 02:05:01,027 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-08-04 02:05:01,071 INFO L144 ThreadInstanceAdder]: Constructed 8 joinOtherThreadTransitions. [2023-08-04 02:05:01,079 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 293 places, 315 transitions, 678 flow [2023-08-04 02:05:01,271 INFO L124 PetriNetUnfolderBase]: 181/1332 cut-off events. [2023-08-04 02:05:01,271 INFO L125 PetriNetUnfolderBase]: For 72/128 co-relation queries the response was YES. [2023-08-04 02:05:01,288 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1429 conditions, 1332 events. 181/1332 cut-off events. For 72/128 co-relation queries the response was YES. Maximal size of possible extension queue 30. Compared 7587 event pairs, 1 based on Foata normal form. 0/1130 useless extension candidates. Maximal degree in co-relation 783. Up to 32 conditions per place. [2023-08-04 02:05:01,288 INFO L82 GeneralOperation]: Start removeDead. Operand has 293 places, 315 transitions, 678 flow [2023-08-04 02:05:01,296 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 293 places, 315 transitions, 678 flow [2023-08-04 02:05:01,296 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-04 02:05:01,296 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 293 places, 315 transitions, 678 flow [2023-08-04 02:05:01,296 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 293 places, 315 transitions, 678 flow [2023-08-04 02:05:01,296 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 293 places, 315 transitions, 678 flow [2023-08-04 02:05:01,444 INFO L124 PetriNetUnfolderBase]: 181/1332 cut-off events. [2023-08-04 02:05:01,444 INFO L125 PetriNetUnfolderBase]: For 72/128 co-relation queries the response was YES. [2023-08-04 02:05:01,462 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1429 conditions, 1332 events. 181/1332 cut-off events. For 72/128 co-relation queries the response was YES. Maximal size of possible extension queue 30. Compared 7587 event pairs, 1 based on Foata normal form. 0/1130 useless extension candidates. Maximal degree in co-relation 783. Up to 32 conditions per place. [2023-08-04 02:05:01,505 INFO L119 LiptonReduction]: Number of co-enabled transitions 53580 [2023-08-04 02:05:08,069 INFO L134 LiptonReduction]: Checked pairs total: 56826 [2023-08-04 02:05:08,069 INFO L136 LiptonReduction]: Total number of compositions: 364 [2023-08-04 02:05:08,071 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-04 02:05:08,071 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;@365da651, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-04 02:05:08,071 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2023-08-04 02:05:08,077 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-04 02:05:08,077 INFO L124 PetriNetUnfolderBase]: 6/72 cut-off events. [2023-08-04 02:05:08,078 INFO L125 PetriNetUnfolderBase]: For 9/9 co-relation queries the response was YES. [2023-08-04 02:05:08,078 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 02:05:08,078 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1] [2023-08-04 02:05:08,080 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-04 02:05:08,080 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 02:05:08,080 INFO L85 PathProgramCache]: Analyzing trace with hash 211444645, now seen corresponding path program 1 times [2023-08-04 02:05:08,080 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 02:05:08,081 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1880437267] [2023-08-04 02:05:08,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 02:05:08,081 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 02:05:08,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 02:05:08,245 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 02:05:08,246 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 02:05:08,246 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1880437267] [2023-08-04 02:05:08,246 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1880437267] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 02:05:08,246 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [235494499] [2023-08-04 02:05:08,247 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 02:05:08,247 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 02:05:08,247 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 02:05:08,248 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 02:05:08,251 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 02:05:08,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 02:05:08,318 INFO L262 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-04 02:05:08,319 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 02:05:08,360 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 02:05:08,360 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 02:05:08,360 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [235494499] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 02:05:08,360 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 02:05:08,360 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 5 [2023-08-04 02:05:08,361 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1536169147] [2023-08-04 02:05:08,365 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 02:05:08,369 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 02:05:08,372 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 02:05:08,389 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 02:05:08,390 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-08-04 02:05:08,413 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 274 out of 679 [2023-08-04 02:05:08,417 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 40 places, 40 transitions, 128 flow. Second operand has 5 states, 5 states have (on average 275.6) internal successors, (1378), 5 states have internal predecessors, (1378), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:05:08,417 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 02:05:08,417 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 274 of 679 [2023-08-04 02:05:08,417 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 02:05:08,651 INFO L124 PetriNetUnfolderBase]: 1392/2494 cut-off events. [2023-08-04 02:05:08,652 INFO L125 PetriNetUnfolderBase]: For 348/348 co-relation queries the response was YES. [2023-08-04 02:05:08,654 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5134 conditions, 2494 events. 1392/2494 cut-off events. For 348/348 co-relation queries the response was YES. Maximal size of possible extension queue 91. Compared 13473 event pairs, 596 based on Foata normal form. 0/2280 useless extension candidates. Maximal degree in co-relation 1955. Up to 2310 conditions per place. [2023-08-04 02:05:08,658 INFO L140 encePairwiseOnDemand]: 673/679 looper letters, 16 selfloop transitions, 5 changer transitions 20/44 dead transitions. [2023-08-04 02:05:08,658 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 42 places, 44 transitions, 210 flow [2023-08-04 02:05:08,659 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-04 02:05:08,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-04 02:05:08,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1412 transitions. [2023-08-04 02:05:08,670 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4159057437407953 [2023-08-04 02:05:08,671 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1412 transitions. [2023-08-04 02:05:08,671 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1412 transitions. [2023-08-04 02:05:08,673 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 02:05:08,674 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1412 transitions. [2023-08-04 02:05:08,678 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 282.4) internal successors, (1412), 5 states have internal predecessors, (1412), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:05:08,684 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 679.0) internal successors, (4074), 6 states have internal predecessors, (4074), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:05:08,685 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 679.0) internal successors, (4074), 6 states have internal predecessors, (4074), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:05:08,686 INFO L175 Difference]: Start difference. First operand has 40 places, 40 transitions, 128 flow. Second operand 5 states and 1412 transitions. [2023-08-04 02:05:08,687 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 42 places, 44 transitions, 210 flow [2023-08-04 02:05:08,690 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 40 places, 44 transitions, 204 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-04 02:05:08,691 INFO L231 Difference]: Finished difference. Result has 41 places, 20 transitions, 75 flow [2023-08-04 02:05:08,692 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=679, PETRI_DIFFERENCE_MINUEND_FLOW=112, PETRI_DIFFERENCE_MINUEND_PLACES=36, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=75, PETRI_PLACES=41, PETRI_TRANSITIONS=20} [2023-08-04 02:05:08,694 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 1 predicate places. [2023-08-04 02:05:08,694 INFO L495 AbstractCegarLoop]: Abstraction has has 41 places, 20 transitions, 75 flow [2023-08-04 02:05:08,695 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 275.6) internal successors, (1378), 5 states have internal predecessors, (1378), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:05:08,695 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 02:05:08,695 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1] [2023-08-04 02:05:08,703 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 02:05:08,898 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 02:05:08,900 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-04 02:05:08,900 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 02:05:08,900 INFO L85 PathProgramCache]: Analyzing trace with hash 1188483888, now seen corresponding path program 1 times [2023-08-04 02:05:08,900 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 02:05:08,900 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [743502391] [2023-08-04 02:05:08,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 02:05:08,900 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 02:05:08,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 02:05:08,953 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 02:05:08,954 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 02:05:08,954 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [743502391] [2023-08-04 02:05:08,954 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [743502391] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 02:05:08,954 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 02:05:08,954 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-04 02:05:08,954 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1005603513] [2023-08-04 02:05:08,954 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 02:05:08,954 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 02:05:08,954 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 02:05:08,955 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 02:05:08,955 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-04 02:05:08,961 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 275 out of 679 [2023-08-04 02:05:08,962 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 20 transitions, 75 flow. Second operand has 3 states, 3 states have (on average 277.0) internal successors, (831), 3 states have internal predecessors, (831), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:05:08,962 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 02:05:08,962 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 275 of 679 [2023-08-04 02:05:08,962 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 02:05:09,017 INFO L124 PetriNetUnfolderBase]: 180/349 cut-off events. [2023-08-04 02:05:09,017 INFO L125 PetriNetUnfolderBase]: For 52/52 co-relation queries the response was YES. [2023-08-04 02:05:09,018 INFO L83 FinitePrefix]: Finished finitePrefix Result has 766 conditions, 349 events. 180/349 cut-off events. For 52/52 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 1275 event pairs, 114 based on Foata normal form. 1/350 useless extension candidates. Maximal degree in co-relation 308. Up to 313 conditions per place. [2023-08-04 02:05:09,019 INFO L140 encePairwiseOnDemand]: 676/679 looper letters, 16 selfloop transitions, 2 changer transitions 0/21 dead transitions. [2023-08-04 02:05:09,019 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 31 places, 21 transitions, 112 flow [2023-08-04 02:05:09,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 02:05:09,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 02:05:09,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 843 transitions. [2023-08-04 02:05:09,021 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41384388807069217 [2023-08-04 02:05:09,021 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 843 transitions. [2023-08-04 02:05:09,021 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 843 transitions. [2023-08-04 02:05:09,021 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 02:05:09,021 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 843 transitions. [2023-08-04 02:05:09,023 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 281.0) internal successors, (843), 3 states have internal predecessors, (843), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:05:09,025 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 679.0) internal successors, (2716), 4 states have internal predecessors, (2716), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:05:09,026 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 679.0) internal successors, (2716), 4 states have internal predecessors, (2716), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:05:09,026 INFO L175 Difference]: Start difference. First operand has 41 places, 20 transitions, 75 flow. Second operand 3 states and 843 transitions. [2023-08-04 02:05:09,026 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 31 places, 21 transitions, 112 flow [2023-08-04 02:05:09,027 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 30 places, 21 transitions, 109 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-08-04 02:05:09,027 INFO L231 Difference]: Finished difference. Result has 30 places, 19 transitions, 71 flow [2023-08-04 02:05:09,027 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=679, PETRI_DIFFERENCE_MINUEND_FLOW=67, PETRI_DIFFERENCE_MINUEND_PLACES=28, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=19, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=17, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=71, PETRI_PLACES=30, PETRI_TRANSITIONS=19} [2023-08-04 02:05:09,028 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, -10 predicate places. [2023-08-04 02:05:09,028 INFO L495 AbstractCegarLoop]: Abstraction has has 30 places, 19 transitions, 71 flow [2023-08-04 02:05:09,028 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 277.0) internal successors, (831), 3 states have internal predecessors, (831), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:05:09,028 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 02:05:09,028 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 02:05:09,028 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-08-04 02:05:09,029 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-04 02:05:09,029 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 02:05:09,029 INFO L85 PathProgramCache]: Analyzing trace with hash -783648855, now seen corresponding path program 1 times [2023-08-04 02:05:09,029 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 02:05:09,029 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [278266315] [2023-08-04 02:05:09,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 02:05:09,029 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 02:05:09,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 02:05:09,057 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 02:05:09,057 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 02:05:09,057 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [278266315] [2023-08-04 02:05:09,057 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [278266315] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 02:05:09,057 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [343359962] [2023-08-04 02:05:09,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 02:05:09,057 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 02:05:09,058 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 02:05:09,059 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 02:05:09,062 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 02:05:09,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 02:05:09,115 INFO L262 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-04 02:05:09,116 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 02:05:09,123 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 02:05:09,123 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 02:05:09,138 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 02:05:09,138 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [343359962] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 02:05:09,138 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 02:05:09,138 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 3 [2023-08-04 02:05:09,138 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1646238289] [2023-08-04 02:05:09,139 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 02:05:09,139 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-04 02:05:09,139 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 02:05:09,139 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-04 02:05:09,139 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-08-04 02:05:09,150 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 274 out of 679 [2023-08-04 02:05:09,151 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 30 places, 19 transitions, 71 flow. Second operand has 4 states, 4 states have (on average 276.25) internal successors, (1105), 4 states have internal predecessors, (1105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:05:09,151 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 02:05:09,151 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 274 of 679 [2023-08-04 02:05:09,151 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 02:05:09,197 INFO L124 PetriNetUnfolderBase]: 136/255 cut-off events. [2023-08-04 02:05:09,197 INFO L125 PetriNetUnfolderBase]: For 34/34 co-relation queries the response was YES. [2023-08-04 02:05:09,198 INFO L83 FinitePrefix]: Finished finitePrefix Result has 557 conditions, 255 events. 136/255 cut-off events. For 34/34 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 771 event pairs, 48 based on Foata normal form. 2/257 useless extension candidates. Maximal degree in co-relation 310. Up to 217 conditions per place. [2023-08-04 02:05:09,198 INFO L140 encePairwiseOnDemand]: 676/679 looper letters, 16 selfloop transitions, 3 changer transitions 0/22 dead transitions. [2023-08-04 02:05:09,199 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 33 places, 22 transitions, 114 flow [2023-08-04 02:05:09,200 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 02:05:09,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 02:05:09,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1116 transitions. [2023-08-04 02:05:09,202 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4108983799705449 [2023-08-04 02:05:09,202 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1116 transitions. [2023-08-04 02:05:09,202 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1116 transitions. [2023-08-04 02:05:09,202 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 02:05:09,202 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1116 transitions. [2023-08-04 02:05:09,204 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 279.0) internal successors, (1116), 4 states have internal predecessors, (1116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:05:09,207 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 679.0) internal successors, (3395), 5 states have internal predecessors, (3395), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:05:09,208 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 679.0) internal successors, (3395), 5 states have internal predecessors, (3395), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:05:09,208 INFO L175 Difference]: Start difference. First operand has 30 places, 19 transitions, 71 flow. Second operand 4 states and 1116 transitions. [2023-08-04 02:05:09,208 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 33 places, 22 transitions, 114 flow [2023-08-04 02:05:09,209 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 31 places, 22 transitions, 110 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-04 02:05:09,209 INFO L231 Difference]: Finished difference. Result has 31 places, 18 transitions, 68 flow [2023-08-04 02:05:09,209 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=679, PETRI_DIFFERENCE_MINUEND_FLOW=62, PETRI_DIFFERENCE_MINUEND_PLACES=28, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=18, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=15, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=68, PETRI_PLACES=31, PETRI_TRANSITIONS=18} [2023-08-04 02:05:09,210 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, -9 predicate places. [2023-08-04 02:05:09,210 INFO L495 AbstractCegarLoop]: Abstraction has has 31 places, 18 transitions, 68 flow [2023-08-04 02:05:09,211 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 276.25) internal successors, (1105), 4 states have internal predecessors, (1105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:05:09,211 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 02:05:09,211 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 02:05:09,229 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-08-04 02:05:09,416 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 02:05:09,416 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-04 02:05:09,417 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 02:05:09,417 INFO L85 PathProgramCache]: Analyzing trace with hash -640483007, now seen corresponding path program 1 times [2023-08-04 02:05:09,417 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 02:05:09,417 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [799030968] [2023-08-04 02:05:09,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 02:05:09,417 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 02:05:09,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 02:05:09,466 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 02:05:09,467 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 02:05:09,467 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [799030968] [2023-08-04 02:05:09,467 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [799030968] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 02:05:09,467 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1972727220] [2023-08-04 02:05:09,467 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 02:05:09,467 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 02:05:09,467 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 02:05:09,469 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 02:05:09,472 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 02:05:09,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 02:05:09,527 INFO L262 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-04 02:05:09,528 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 02:05:09,545 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 02:05:09,545 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 02:05:09,546 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1972727220] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 02:05:09,546 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 02:05:09,546 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 6 [2023-08-04 02:05:09,546 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [168961270] [2023-08-04 02:05:09,546 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 02:05:09,546 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 02:05:09,546 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 02:05:09,547 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 02:05:09,547 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-08-04 02:05:09,559 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 274 out of 679 [2023-08-04 02:05:09,561 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 31 places, 18 transitions, 68 flow. Second operand has 5 states, 5 states have (on average 276.6) internal successors, (1383), 5 states have internal predecessors, (1383), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:05:09,561 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 02:05:09,561 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 274 of 679 [2023-08-04 02:05:09,561 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 02:05:09,612 INFO L124 PetriNetUnfolderBase]: 104/199 cut-off events. [2023-08-04 02:05:09,612 INFO L125 PetriNetUnfolderBase]: For 42/42 co-relation queries the response was YES. [2023-08-04 02:05:09,612 INFO L83 FinitePrefix]: Finished finitePrefix Result has 449 conditions, 199 events. 104/199 cut-off events. For 42/42 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 532 event pairs, 8 based on Foata normal form. 16/215 useless extension candidates. Maximal degree in co-relation 237. Up to 80 conditions per place. [2023-08-04 02:05:09,612 INFO L140 encePairwiseOnDemand]: 676/679 looper letters, 0 selfloop transitions, 0 changer transitions 28/28 dead transitions. [2023-08-04 02:05:09,612 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 34 places, 28 transitions, 138 flow [2023-08-04 02:05:09,613 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-04 02:05:09,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-04 02:05:09,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1396 transitions. [2023-08-04 02:05:09,615 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41119293078055963 [2023-08-04 02:05:09,615 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1396 transitions. [2023-08-04 02:05:09,615 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1396 transitions. [2023-08-04 02:05:09,616 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 02:05:09,616 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1396 transitions. [2023-08-04 02:05:09,618 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 279.2) internal successors, (1396), 5 states have internal predecessors, (1396), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:05:09,621 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 679.0) internal successors, (4074), 6 states have internal predecessors, (4074), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:05:09,623 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 679.0) internal successors, (4074), 6 states have internal predecessors, (4074), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:05:09,623 INFO L175 Difference]: Start difference. First operand has 31 places, 18 transitions, 68 flow. Second operand 5 states and 1396 transitions. [2023-08-04 02:05:09,623 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 34 places, 28 transitions, 138 flow [2023-08-04 02:05:09,623 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 30 places, 28 transitions, 131 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-08-04 02:05:09,623 INFO L231 Difference]: Finished difference. Result has 30 places, 0 transitions, 0 flow [2023-08-04 02:05:09,624 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=679, PETRI_DIFFERENCE_MINUEND_FLOW=57, PETRI_DIFFERENCE_MINUEND_PLACES=26, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=17, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=17, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=0, PETRI_PLACES=30, PETRI_TRANSITIONS=0} [2023-08-04 02:05:09,624 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, -10 predicate places. [2023-08-04 02:05:09,624 INFO L495 AbstractCegarLoop]: Abstraction has has 30 places, 0 transitions, 0 flow [2023-08-04 02:05:09,625 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 276.6) internal successors, (1383), 5 states have internal predecessors, (1383), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:05:09,625 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2023-08-04 02:05:09,625 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 2 remaining) [2023-08-04 02:05:09,644 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 02:05:09,829 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 02:05:09,830 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1] [2023-08-04 02:05:09,830 INFO L307 ceAbstractionStarter]: Result for error location InUseError was SAFE,SAFE (1/2) [2023-08-04 02:05:09,833 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 293 places, 315 transitions, 678 flow [2023-08-04 02:05:09,956 INFO L124 PetriNetUnfolderBase]: 181/1332 cut-off events. [2023-08-04 02:05:09,957 INFO L125 PetriNetUnfolderBase]: For 72/128 co-relation queries the response was YES. [2023-08-04 02:05:09,974 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1429 conditions, 1332 events. 181/1332 cut-off events. For 72/128 co-relation queries the response was YES. Maximal size of possible extension queue 30. Compared 7587 event pairs, 1 based on Foata normal form. 0/1130 useless extension candidates. Maximal degree in co-relation 783. Up to 32 conditions per place. [2023-08-04 02:05:09,975 INFO L82 GeneralOperation]: Start removeDead. Operand has 293 places, 315 transitions, 678 flow [2023-08-04 02:05:09,981 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 293 places, 315 transitions, 678 flow [2023-08-04 02:05:09,982 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-04 02:05:09,982 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 293 places, 315 transitions, 678 flow [2023-08-04 02:05:09,982 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 293 places, 315 transitions, 678 flow [2023-08-04 02:05:09,982 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 293 places, 315 transitions, 678 flow [2023-08-04 02:05:10,102 INFO L124 PetriNetUnfolderBase]: 181/1332 cut-off events. [2023-08-04 02:05:10,102 INFO L125 PetriNetUnfolderBase]: For 72/128 co-relation queries the response was YES. [2023-08-04 02:05:10,119 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1429 conditions, 1332 events. 181/1332 cut-off events. For 72/128 co-relation queries the response was YES. Maximal size of possible extension queue 30. Compared 7587 event pairs, 1 based on Foata normal form. 0/1130 useless extension candidates. Maximal degree in co-relation 783. Up to 32 conditions per place. [2023-08-04 02:05:10,155 INFO L119 LiptonReduction]: Number of co-enabled transitions 53580 [2023-08-04 02:05:16,335 INFO L134 LiptonReduction]: Checked pairs total: 55620 [2023-08-04 02:05:16,335 INFO L136 LiptonReduction]: Total number of compositions: 355 [2023-08-04 02:05:16,336 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-04 02:05:16,337 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;@365da651, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-04 02:05:16,337 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-04 02:05:16,339 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-04 02:05:16,339 INFO L124 PetriNetUnfolderBase]: 1/19 cut-off events. [2023-08-04 02:05:16,339 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 02:05:16,340 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 02:05:16,340 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-08-04 02:05:16,340 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 02:05:16,340 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 02:05:16,340 INFO L85 PathProgramCache]: Analyzing trace with hash -1247067936, now seen corresponding path program 1 times [2023-08-04 02:05:16,340 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 02:05:16,340 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1060804001] [2023-08-04 02:05:16,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 02:05:16,340 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 02:05:16,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 02:05:16,365 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 02:05:16,365 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 02:05:16,365 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1060804001] [2023-08-04 02:05:16,365 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1060804001] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 02:05:16,365 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 02:05:16,365 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-04 02:05:16,365 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1296964815] [2023-08-04 02:05:16,365 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 02:05:16,365 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 02:05:16,366 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 02:05:16,366 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 02:05:16,366 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-04 02:05:16,376 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 275 out of 670 [2023-08-04 02:05:16,376 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 40 places, 40 transitions, 128 flow. Second operand has 3 states, 3 states have (on average 277.0) internal successors, (831), 3 states have internal predecessors, (831), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:05:16,376 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 02:05:16,376 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 275 of 670 [2023-08-04 02:05:16,377 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 02:05:16,617 INFO L124 PetriNetUnfolderBase]: 1377/2446 cut-off events. [2023-08-04 02:05:16,617 INFO L125 PetriNetUnfolderBase]: For 370/370 co-relation queries the response was YES. [2023-08-04 02:05:16,619 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5047 conditions, 2446 events. 1377/2446 cut-off events. For 370/370 co-relation queries the response was YES. Maximal size of possible extension queue 91. Compared 12906 event pairs, 884 based on Foata normal form. 0/2234 useless extension candidates. Maximal degree in co-relation 1952. Up to 2292 conditions per place. [2023-08-04 02:05:16,626 INFO L140 encePairwiseOnDemand]: 665/670 looper letters, 33 selfloop transitions, 2 changer transitions 2/41 dead transitions. [2023-08-04 02:05:16,626 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 41 places, 41 transitions, 200 flow [2023-08-04 02:05:16,626 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 02:05:16,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 02:05:16,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 863 transitions. [2023-08-04 02:05:16,628 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4293532338308458 [2023-08-04 02:05:16,628 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 863 transitions. [2023-08-04 02:05:16,628 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 863 transitions. [2023-08-04 02:05:16,628 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 02:05:16,628 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 863 transitions. [2023-08-04 02:05:16,631 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 287.6666666666667) internal successors, (863), 3 states have internal predecessors, (863), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:05:16,634 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 670.0) internal successors, (2680), 4 states have internal predecessors, (2680), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:05:16,638 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 670.0) internal successors, (2680), 4 states have internal predecessors, (2680), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:05:16,638 INFO L175 Difference]: Start difference. First operand has 40 places, 40 transitions, 128 flow. Second operand 3 states and 863 transitions. [2023-08-04 02:05:16,638 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 41 places, 41 transitions, 200 flow [2023-08-04 02:05:16,639 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 41 transitions, 200 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-04 02:05:16,641 INFO L231 Difference]: Finished difference. Result has 42 places, 37 transitions, 124 flow [2023-08-04 02:05:16,641 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=670, PETRI_DIFFERENCE_MINUEND_FLOW=124, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=124, PETRI_PLACES=42, PETRI_TRANSITIONS=37} [2023-08-04 02:05:16,643 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 2 predicate places. [2023-08-04 02:05:16,643 INFO L495 AbstractCegarLoop]: Abstraction has has 42 places, 37 transitions, 124 flow [2023-08-04 02:05:16,643 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 277.0) internal successors, (831), 3 states have internal predecessors, (831), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:05:16,643 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 02:05:16,643 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 02:05:16,644 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-08-04 02:05:16,644 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 02:05:16,644 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 02:05:16,644 INFO L85 PathProgramCache]: Analyzing trace with hash -440548800, now seen corresponding path program 1 times [2023-08-04 02:05:16,644 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 02:05:16,644 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1218009439] [2023-08-04 02:05:16,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 02:05:16,644 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 02:05:16,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 02:05:16,689 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 02:05:16,690 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 02:05:16,690 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1218009439] [2023-08-04 02:05:16,690 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1218009439] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 02:05:16,690 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1162248045] [2023-08-04 02:05:16,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 02:05:16,690 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 02:05:16,690 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 02:05:16,692 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 02:05:16,693 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 02:05:16,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 02:05:16,745 INFO L262 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 02:05:16,746 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 02:05:16,753 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 02:05:16,753 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 02:05:16,753 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1162248045] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 02:05:16,753 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 02:05:16,753 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2023-08-04 02:05:16,754 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [882265585] [2023-08-04 02:05:16,754 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 02:05:16,754 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 02:05:16,754 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 02:05:16,754 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 02:05:16,754 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 02:05:16,761 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 275 out of 670 [2023-08-04 02:05:16,762 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 37 transitions, 124 flow. Second operand has 3 states, 3 states have (on average 278.6666666666667) internal successors, (836), 3 states have internal predecessors, (836), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:05:16,762 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 02:05:16,762 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 275 of 670 [2023-08-04 02:05:16,762 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 02:05:16,973 INFO L124 PetriNetUnfolderBase]: 1371/2440 cut-off events. [2023-08-04 02:05:16,973 INFO L125 PetriNetUnfolderBase]: For 305/305 co-relation queries the response was YES. [2023-08-04 02:05:16,976 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5024 conditions, 2440 events. 1371/2440 cut-off events. For 305/305 co-relation queries the response was YES. Maximal size of possible extension queue 98. Compared 12866 event pairs, 887 based on Foata normal form. 0/2242 useless extension candidates. Maximal degree in co-relation 4996. Up to 2246 conditions per place. [2023-08-04 02:05:16,982 INFO L140 encePairwiseOnDemand]: 667/670 looper letters, 36 selfloop transitions, 2 changer transitions 0/42 dead transitions. [2023-08-04 02:05:16,982 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 42 places, 42 transitions, 210 flow [2023-08-04 02:05:16,982 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 02:05:16,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 02:05:16,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 863 transitions. [2023-08-04 02:05:16,984 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4293532338308458 [2023-08-04 02:05:16,984 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 863 transitions. [2023-08-04 02:05:16,984 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 863 transitions. [2023-08-04 02:05:16,985 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 02:05:16,985 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 863 transitions. [2023-08-04 02:05:16,986 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 287.6666666666667) internal successors, (863), 3 states have internal predecessors, (863), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:05:16,988 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 670.0) internal successors, (2680), 4 states have internal predecessors, (2680), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:05:16,988 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 670.0) internal successors, (2680), 4 states have internal predecessors, (2680), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:05:16,988 INFO L175 Difference]: Start difference. First operand has 42 places, 37 transitions, 124 flow. Second operand 3 states and 863 transitions. [2023-08-04 02:05:16,988 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 42 places, 42 transitions, 210 flow [2023-08-04 02:05:16,992 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 39 places, 42 transitions, 202 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-08-04 02:05:16,993 INFO L231 Difference]: Finished difference. Result has 40 places, 38 transitions, 128 flow [2023-08-04 02:05:16,993 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=670, PETRI_DIFFERENCE_MINUEND_FLOW=116, PETRI_DIFFERENCE_MINUEND_PLACES=37, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=128, PETRI_PLACES=40, PETRI_TRANSITIONS=38} [2023-08-04 02:05:16,994 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 0 predicate places. [2023-08-04 02:05:16,994 INFO L495 AbstractCegarLoop]: Abstraction has has 40 places, 38 transitions, 128 flow [2023-08-04 02:05:16,995 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 278.6666666666667) internal successors, (836), 3 states have internal predecessors, (836), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:05:16,995 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 02:05:16,995 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 02:05:17,001 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2023-08-04 02:05:17,199 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 02:05:17,199 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 02:05:17,200 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 02:05:17,200 INFO L85 PathProgramCache]: Analyzing trace with hash -536598349, now seen corresponding path program 1 times [2023-08-04 02:05:17,200 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 02:05:17,200 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [444279738] [2023-08-04 02:05:17,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 02:05:17,200 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 02:05:17,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 02:05:17,253 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 02:05:17,253 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 02:05:17,253 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [444279738] [2023-08-04 02:05:17,254 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [444279738] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 02:05:17,254 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1739078693] [2023-08-04 02:05:17,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 02:05:17,254 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 02:05:17,254 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 02:05:17,257 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 02:05:17,284 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 02:05:17,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 02:05:17,329 INFO L262 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 02:05:17,329 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 02:05:17,334 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 02:05:17,334 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 02:05:17,334 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1739078693] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 02:05:17,334 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 02:05:17,335 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2023-08-04 02:05:17,335 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [752176461] [2023-08-04 02:05:17,335 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 02:05:17,335 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 02:05:17,335 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 02:05:17,335 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 02:05:17,335 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 02:05:17,343 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 275 out of 670 [2023-08-04 02:05:17,344 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 40 places, 38 transitions, 128 flow. Second operand has 3 states, 3 states have (on average 279.6666666666667) internal successors, (839), 3 states have internal predecessors, (839), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:05:17,344 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 02:05:17,344 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 275 of 670 [2023-08-04 02:05:17,344 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 02:05:17,577 INFO L124 PetriNetUnfolderBase]: 1185/2182 cut-off events. [2023-08-04 02:05:17,577 INFO L125 PetriNetUnfolderBase]: For 223/223 co-relation queries the response was YES. [2023-08-04 02:05:17,580 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4587 conditions, 2182 events. 1185/2182 cut-off events. For 223/223 co-relation queries the response was YES. Maximal size of possible extension queue 87. Compared 11562 event pairs, 848 based on Foata normal form. 0/2052 useless extension candidates. Maximal degree in co-relation 2098. Up to 1718 conditions per place. [2023-08-04 02:05:17,587 INFO L140 encePairwiseOnDemand]: 667/670 looper letters, 42 selfloop transitions, 2 changer transitions 0/48 dead transitions. [2023-08-04 02:05:17,587 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 42 places, 48 transitions, 246 flow [2023-08-04 02:05:17,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 02:05:17,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 02:05:17,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 868 transitions. [2023-08-04 02:05:17,591 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4318407960199005 [2023-08-04 02:05:17,591 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 868 transitions. [2023-08-04 02:05:17,591 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 868 transitions. [2023-08-04 02:05:17,591 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 02:05:17,592 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 868 transitions. [2023-08-04 02:05:17,594 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 289.3333333333333) internal successors, (868), 3 states have internal predecessors, (868), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:05:17,597 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 670.0) internal successors, (2680), 4 states have internal predecessors, (2680), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:05:17,598 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 670.0) internal successors, (2680), 4 states have internal predecessors, (2680), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:05:17,598 INFO L175 Difference]: Start difference. First operand has 40 places, 38 transitions, 128 flow. Second operand 3 states and 868 transitions. [2023-08-04 02:05:17,598 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 42 places, 48 transitions, 246 flow [2023-08-04 02:05:17,600 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 48 transitions, 244 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 02:05:17,601 INFO L231 Difference]: Finished difference. Result has 42 places, 39 transitions, 138 flow [2023-08-04 02:05:17,601 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=670, PETRI_DIFFERENCE_MINUEND_FLOW=126, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=138, PETRI_PLACES=42, PETRI_TRANSITIONS=39} [2023-08-04 02:05:17,602 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 2 predicate places. [2023-08-04 02:05:17,602 INFO L495 AbstractCegarLoop]: Abstraction has has 42 places, 39 transitions, 138 flow [2023-08-04 02:05:17,603 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 279.6666666666667) internal successors, (839), 3 states have internal predecessors, (839), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:05:17,603 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 02:05:17,603 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 02:05:17,611 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 02:05:17,812 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 02:05:17,815 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 02:05:17,815 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 02:05:17,816 INFO L85 PathProgramCache]: Analyzing trace with hash -122446268, now seen corresponding path program 1 times [2023-08-04 02:05:17,816 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 02:05:17,816 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [906218440] [2023-08-04 02:05:17,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 02:05:17,816 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 02:05:17,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 02:05:17,875 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 02:05:17,875 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 02:05:17,875 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [906218440] [2023-08-04 02:05:17,875 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [906218440] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 02:05:17,875 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [401240767] [2023-08-04 02:05:17,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 02:05:17,875 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 02:05:17,875 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 02:05:17,879 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 02:05:17,879 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 02:05:17,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 02:05:17,936 INFO L262 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 02:05:17,936 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 02:05:17,946 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 02:05:17,946 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 02:05:17,946 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [401240767] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 02:05:17,946 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 02:05:17,946 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2023-08-04 02:05:17,946 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [387419053] [2023-08-04 02:05:17,946 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 02:05:17,946 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 02:05:17,946 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 02:05:17,947 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 02:05:17,947 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 02:05:17,953 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 275 out of 670 [2023-08-04 02:05:17,954 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 39 transitions, 138 flow. Second operand has 3 states, 3 states have (on average 281.0) internal successors, (843), 3 states have internal predecessors, (843), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:05:17,954 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 02:05:17,954 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 275 of 670 [2023-08-04 02:05:17,954 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 02:05:18,129 INFO L124 PetriNetUnfolderBase]: 1048/2001 cut-off events. [2023-08-04 02:05:18,129 INFO L125 PetriNetUnfolderBase]: For 450/450 co-relation queries the response was YES. [2023-08-04 02:05:18,132 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4479 conditions, 2001 events. 1048/2001 cut-off events. For 450/450 co-relation queries the response was YES. Maximal size of possible extension queue 69. Compared 10338 event pairs, 759 based on Foata normal form. 0/1968 useless extension candidates. Maximal degree in co-relation 2203. Up to 1464 conditions per place. [2023-08-04 02:05:18,136 INFO L140 encePairwiseOnDemand]: 667/670 looper letters, 43 selfloop transitions, 2 changer transitions 0/49 dead transitions. [2023-08-04 02:05:18,136 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 49 transitions, 258 flow [2023-08-04 02:05:18,136 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 02:05:18,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 02:05:18,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 868 transitions. [2023-08-04 02:05:18,138 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4318407960199005 [2023-08-04 02:05:18,138 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 868 transitions. [2023-08-04 02:05:18,138 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 868 transitions. [2023-08-04 02:05:18,138 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 02:05:18,139 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 868 transitions. [2023-08-04 02:05:18,140 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 289.3333333333333) internal successors, (868), 3 states have internal predecessors, (868), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:05:18,142 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 670.0) internal successors, (2680), 4 states have internal predecessors, (2680), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:05:18,142 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 670.0) internal successors, (2680), 4 states have internal predecessors, (2680), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:05:18,142 INFO L175 Difference]: Start difference. First operand has 42 places, 39 transitions, 138 flow. Second operand 3 states and 868 transitions. [2023-08-04 02:05:18,142 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 49 transitions, 258 flow [2023-08-04 02:05:18,143 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 43 places, 49 transitions, 256 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 02:05:18,144 INFO L231 Difference]: Finished difference. Result has 44 places, 40 transitions, 148 flow [2023-08-04 02:05:18,144 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=670, PETRI_DIFFERENCE_MINUEND_FLOW=136, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=148, PETRI_PLACES=44, PETRI_TRANSITIONS=40} [2023-08-04 02:05:18,144 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 4 predicate places. [2023-08-04 02:05:18,145 INFO L495 AbstractCegarLoop]: Abstraction has has 44 places, 40 transitions, 148 flow [2023-08-04 02:05:18,145 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 281.0) internal successors, (843), 3 states have internal predecessors, (843), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:05:18,145 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 02:05:18,145 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 02:05:18,167 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-08-04 02:05:18,349 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 02:05:18,349 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 02:05:18,349 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 02:05:18,350 INFO L85 PathProgramCache]: Analyzing trace with hash -1912915521, now seen corresponding path program 1 times [2023-08-04 02:05:18,350 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 02:05:18,350 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [356182355] [2023-08-04 02:05:18,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 02:05:18,350 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 02:05:18,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 02:05:18,387 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 02:05:18,387 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 02:05:18,387 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [356182355] [2023-08-04 02:05:18,387 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [356182355] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 02:05:18,387 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1334136005] [2023-08-04 02:05:18,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 02:05:18,387 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 02:05:18,387 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 02:05:18,390 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 02:05:18,392 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 02:05:18,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 02:05:18,458 INFO L262 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-04 02:05:18,459 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 02:05:18,471 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 02:05:18,472 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 02:05:18,484 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 02:05:18,485 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1334136005] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 02:05:18,485 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 02:05:18,485 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 4 [2023-08-04 02:05:18,486 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1579895803] [2023-08-04 02:05:18,486 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 02:05:18,487 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 02:05:18,487 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 02:05:18,487 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 02:05:18,487 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-04 02:05:18,502 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 274 out of 670 [2023-08-04 02:05:18,503 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 40 transitions, 148 flow. Second operand has 5 states, 5 states have (on average 279.2) internal successors, (1396), 5 states have internal predecessors, (1396), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:05:18,503 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 02:05:18,503 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 274 of 670 [2023-08-04 02:05:18,503 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 02:05:18,679 INFO L124 PetriNetUnfolderBase]: 946/1805 cut-off events. [2023-08-04 02:05:18,679 INFO L125 PetriNetUnfolderBase]: For 402/402 co-relation queries the response was YES. [2023-08-04 02:05:18,681 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4143 conditions, 1805 events. 946/1805 cut-off events. For 402/402 co-relation queries the response was YES. Maximal size of possible extension queue 69. Compared 9188 event pairs, 429 based on Foata normal form. 2/1807 useless extension candidates. Maximal degree in co-relation 2162. Up to 1648 conditions per place. [2023-08-04 02:05:18,685 INFO L140 encePairwiseOnDemand]: 666/670 looper letters, 37 selfloop transitions, 3 changer transitions 1/45 dead transitions. [2023-08-04 02:05:18,685 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 45 transitions, 240 flow [2023-08-04 02:05:18,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 02:05:18,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 02:05:18,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1135 transitions. [2023-08-04 02:05:18,687 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42350746268656714 [2023-08-04 02:05:18,687 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1135 transitions. [2023-08-04 02:05:18,687 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1135 transitions. [2023-08-04 02:05:18,688 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 02:05:18,688 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1135 transitions. [2023-08-04 02:05:18,689 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 283.75) internal successors, (1135), 4 states have internal predecessors, (1135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:05:18,691 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 670.0) internal successors, (3350), 5 states have internal predecessors, (3350), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:05:18,692 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 670.0) internal successors, (3350), 5 states have internal predecessors, (3350), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:05:18,692 INFO L175 Difference]: Start difference. First operand has 44 places, 40 transitions, 148 flow. Second operand 4 states and 1135 transitions. [2023-08-04 02:05:18,692 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 45 transitions, 240 flow [2023-08-04 02:05:18,695 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 45 transitions, 238 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 02:05:18,695 INFO L231 Difference]: Finished difference. Result has 48 places, 40 transitions, 160 flow [2023-08-04 02:05:18,695 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=670, PETRI_DIFFERENCE_MINUEND_FLOW=146, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=160, PETRI_PLACES=48, PETRI_TRANSITIONS=40} [2023-08-04 02:05:18,696 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 8 predicate places. [2023-08-04 02:05:18,696 INFO L495 AbstractCegarLoop]: Abstraction has has 48 places, 40 transitions, 160 flow [2023-08-04 02:05:18,696 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 279.2) internal successors, (1396), 5 states have internal predecessors, (1396), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:05:18,696 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 02:05:18,696 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] [2023-08-04 02:05:18,701 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 02:05:18,901 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 02:05:18,901 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 02:05:18,902 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 02:05:18,902 INFO L85 PathProgramCache]: Analyzing trace with hash 1792535824, now seen corresponding path program 1 times [2023-08-04 02:05:18,902 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 02:05:18,902 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1565608665] [2023-08-04 02:05:18,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 02:05:18,902 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 02:05:18,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 02:05:18,939 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 02:05:18,940 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 02:05:18,940 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1565608665] [2023-08-04 02:05:18,940 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1565608665] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 02:05:18,940 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1067675480] [2023-08-04 02:05:18,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 02:05:18,940 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 02:05:18,940 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 02:05:18,941 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 02:05:18,943 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 02:05:19,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 02:05:19,008 INFO L262 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-04 02:05:19,009 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 02:05:19,017 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 02:05:19,017 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 02:05:19,029 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 02:05:19,029 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1067675480] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 02:05:19,029 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 02:05:19,029 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 5 [2023-08-04 02:05:19,029 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [516212158] [2023-08-04 02:05:19,029 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 02:05:19,030 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 02:05:19,030 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 02:05:19,030 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 02:05:19,030 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-04 02:05:19,039 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 274 out of 670 [2023-08-04 02:05:19,040 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 48 places, 40 transitions, 160 flow. Second operand has 5 states, 5 states have (on average 279.4) internal successors, (1397), 5 states have internal predecessors, (1397), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:05:19,040 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 02:05:19,040 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 274 of 670 [2023-08-04 02:05:19,040 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 02:05:19,246 INFO L124 PetriNetUnfolderBase]: 894/1709 cut-off events. [2023-08-04 02:05:19,247 INFO L125 PetriNetUnfolderBase]: For 298/298 co-relation queries the response was YES. [2023-08-04 02:05:19,250 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3910 conditions, 1709 events. 894/1709 cut-off events. For 298/298 co-relation queries the response was YES. Maximal size of possible extension queue 74. Compared 8403 event pairs, 406 based on Foata normal form. 8/1717 useless extension candidates. Maximal degree in co-relation 2455. Up to 1428 conditions per place. [2023-08-04 02:05:19,255 INFO L140 encePairwiseOnDemand]: 666/670 looper letters, 41 selfloop transitions, 3 changer transitions 1/49 dead transitions. [2023-08-04 02:05:19,255 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 51 places, 49 transitions, 268 flow [2023-08-04 02:05:19,255 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 02:05:19,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 02:05:19,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1139 transitions. [2023-08-04 02:05:19,257 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.425 [2023-08-04 02:05:19,257 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1139 transitions. [2023-08-04 02:05:19,257 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1139 transitions. [2023-08-04 02:05:19,258 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 02:05:19,258 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1139 transitions. [2023-08-04 02:05:19,260 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 284.75) internal successors, (1139), 4 states have internal predecessors, (1139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:05:19,262 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 670.0) internal successors, (3350), 5 states have internal predecessors, (3350), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:05:19,262 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 670.0) internal successors, (3350), 5 states have internal predecessors, (3350), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:05:19,262 INFO L175 Difference]: Start difference. First operand has 48 places, 40 transitions, 160 flow. Second operand 4 states and 1139 transitions. [2023-08-04 02:05:19,262 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 51 places, 49 transitions, 268 flow [2023-08-04 02:05:19,264 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 48 places, 49 transitions, 259 flow, removed 1 selfloop flow, removed 3 redundant places. [2023-08-04 02:05:19,265 INFO L231 Difference]: Finished difference. Result has 50 places, 40 transitions, 165 flow [2023-08-04 02:05:19,265 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=670, PETRI_DIFFERENCE_MINUEND_FLOW=151, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=165, PETRI_PLACES=50, PETRI_TRANSITIONS=40} [2023-08-04 02:05:19,265 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 10 predicate places. [2023-08-04 02:05:19,265 INFO L495 AbstractCegarLoop]: Abstraction has has 50 places, 40 transitions, 165 flow [2023-08-04 02:05:19,266 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 279.4) internal successors, (1397), 5 states have internal predecessors, (1397), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:05:19,266 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 02:05:19,266 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] [2023-08-04 02:05:19,275 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 02:05:19,473 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2023-08-04 02:05:19,473 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 02:05:19,473 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 02:05:19,473 INFO L85 PathProgramCache]: Analyzing trace with hash -1667699594, now seen corresponding path program 1 times [2023-08-04 02:05:19,473 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 02:05:19,474 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1101861205] [2023-08-04 02:05:19,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 02:05:19,474 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 02:05:19,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 02:05:19,513 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2023-08-04 02:05:19,513 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 02:05:19,513 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1101861205] [2023-08-04 02:05:19,513 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1101861205] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 02:05:19,513 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [793350458] [2023-08-04 02:05:19,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 02:05:19,513 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 02:05:19,514 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 02:05:19,515 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 02:05:19,517 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 02:05:19,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 02:05:19,584 INFO L262 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-04 02:05:19,585 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 02:05:19,594 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2023-08-04 02:05:19,594 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 02:05:19,603 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2023-08-04 02:05:19,604 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [793350458] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 02:05:19,604 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 02:05:19,604 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 5 [2023-08-04 02:05:19,604 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [264319816] [2023-08-04 02:05:19,604 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 02:05:19,604 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 02:05:19,604 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 02:05:19,605 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 02:05:19,605 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-04 02:05:19,614 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 274 out of 670 [2023-08-04 02:05:19,615 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 40 transitions, 165 flow. Second operand has 5 states, 5 states have (on average 279.6) internal successors, (1398), 5 states have internal predecessors, (1398), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:05:19,615 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 02:05:19,615 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 274 of 670 [2023-08-04 02:05:19,615 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 02:05:19,766 INFO L124 PetriNetUnfolderBase]: 546/1073 cut-off events. [2023-08-04 02:05:19,766 INFO L125 PetriNetUnfolderBase]: For 403/403 co-relation queries the response was YES. [2023-08-04 02:05:19,768 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2510 conditions, 1073 events. 546/1073 cut-off events. For 403/403 co-relation queries the response was YES. Maximal size of possible extension queue 42. Compared 4514 event pairs, 227 based on Foata normal form. 32/1105 useless extension candidates. Maximal degree in co-relation 1905. Up to 483 conditions per place. [2023-08-04 02:05:19,770 INFO L140 encePairwiseOnDemand]: 666/670 looper letters, 46 selfloop transitions, 4 changer transitions 0/54 dead transitions. [2023-08-04 02:05:19,770 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 54 transitions, 302 flow [2023-08-04 02:05:19,771 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 02:05:19,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 02:05:19,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1144 transitions. [2023-08-04 02:05:19,773 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42686567164179107 [2023-08-04 02:05:19,773 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1144 transitions. [2023-08-04 02:05:19,773 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1144 transitions. [2023-08-04 02:05:19,773 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 02:05:19,773 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1144 transitions. [2023-08-04 02:05:19,775 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 286.0) internal successors, (1144), 4 states have internal predecessors, (1144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:05:19,777 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 670.0) internal successors, (3350), 5 states have internal predecessors, (3350), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:05:19,777 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 670.0) internal successors, (3350), 5 states have internal predecessors, (3350), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:05:19,777 INFO L175 Difference]: Start difference. First operand has 50 places, 40 transitions, 165 flow. Second operand 4 states and 1144 transitions. [2023-08-04 02:05:19,777 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 54 transitions, 302 flow [2023-08-04 02:05:19,779 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 54 transitions, 292 flow, removed 1 selfloop flow, removed 3 redundant places. [2023-08-04 02:05:19,779 INFO L231 Difference]: Finished difference. Result has 52 places, 41 transitions, 176 flow [2023-08-04 02:05:19,779 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=670, PETRI_DIFFERENCE_MINUEND_FLOW=156, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=176, PETRI_PLACES=52, PETRI_TRANSITIONS=41} [2023-08-04 02:05:19,780 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 12 predicate places. [2023-08-04 02:05:19,780 INFO L495 AbstractCegarLoop]: Abstraction has has 52 places, 41 transitions, 176 flow [2023-08-04 02:05:19,780 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 279.6) internal successors, (1398), 5 states have internal predecessors, (1398), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:05:19,780 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 02:05:19,780 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] [2023-08-04 02:05:19,785 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 02:05:19,985 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 02:05:19,985 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 02:05:19,985 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 02:05:19,985 INFO L85 PathProgramCache]: Analyzing trace with hash -16732494, now seen corresponding path program 1 times [2023-08-04 02:05:19,985 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 02:05:19,985 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1631113851] [2023-08-04 02:05:19,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 02:05:19,986 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 02:05:19,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 02:05:20,035 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2023-08-04 02:05:20,035 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 02:05:20,035 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1631113851] [2023-08-04 02:05:20,036 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1631113851] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 02:05:20,036 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1925095100] [2023-08-04 02:05:20,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 02:05:20,036 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 02:05:20,036 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 02:05:20,037 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 02:05:20,039 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 02:05:20,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 02:05:20,112 INFO L262 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-04 02:05:20,113 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 02:05:20,122 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2023-08-04 02:05:20,122 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 02:05:20,131 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2023-08-04 02:05:20,131 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1925095100] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 02:05:20,131 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 02:05:20,131 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 5 [2023-08-04 02:05:20,131 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [361960693] [2023-08-04 02:05:20,131 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 02:05:20,131 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 02:05:20,132 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 02:05:20,132 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 02:05:20,132 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-04 02:05:20,141 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 274 out of 670 [2023-08-04 02:05:20,142 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 41 transitions, 176 flow. Second operand has 5 states, 5 states have (on average 280.0) internal successors, (1400), 5 states have internal predecessors, (1400), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:05:20,142 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 02:05:20,142 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 274 of 670 [2023-08-04 02:05:20,142 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 02:05:20,259 INFO L124 PetriNetUnfolderBase]: 530/1026 cut-off events. [2023-08-04 02:05:20,259 INFO L125 PetriNetUnfolderBase]: For 688/688 co-relation queries the response was YES. [2023-08-04 02:05:20,261 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2614 conditions, 1026 events. 530/1026 cut-off events. For 688/688 co-relation queries the response was YES. Maximal size of possible extension queue 42. Compared 4242 event pairs, 439 based on Foata normal form. 9/1035 useless extension candidates. Maximal degree in co-relation 2086. Up to 752 conditions per place. [2023-08-04 02:05:20,262 INFO L140 encePairwiseOnDemand]: 666/670 looper letters, 46 selfloop transitions, 3 changer transitions 2/55 dead transitions. [2023-08-04 02:05:20,262 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 55 transitions, 314 flow [2023-08-04 02:05:20,263 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 02:05:20,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 02:05:20,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1144 transitions. [2023-08-04 02:05:20,265 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42686567164179107 [2023-08-04 02:05:20,265 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1144 transitions. [2023-08-04 02:05:20,265 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1144 transitions. [2023-08-04 02:05:20,265 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 02:05:20,265 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1144 transitions. [2023-08-04 02:05:20,267 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 286.0) internal successors, (1144), 4 states have internal predecessors, (1144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:05:20,269 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 670.0) internal successors, (3350), 5 states have internal predecessors, (3350), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:05:20,269 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 670.0) internal successors, (3350), 5 states have internal predecessors, (3350), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:05:20,269 INFO L175 Difference]: Start difference. First operand has 52 places, 41 transitions, 176 flow. Second operand 4 states and 1144 transitions. [2023-08-04 02:05:20,269 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 55 transitions, 314 flow [2023-08-04 02:05:20,271 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 55 transitions, 310 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-08-04 02:05:20,272 INFO L231 Difference]: Finished difference. Result has 56 places, 40 transitions, 180 flow [2023-08-04 02:05:20,272 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=670, PETRI_DIFFERENCE_MINUEND_FLOW=172, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=180, PETRI_PLACES=56, PETRI_TRANSITIONS=40} [2023-08-04 02:05:20,272 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 16 predicate places. [2023-08-04 02:05:20,272 INFO L495 AbstractCegarLoop]: Abstraction has has 56 places, 40 transitions, 180 flow [2023-08-04 02:05:20,272 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 280.0) internal successors, (1400), 5 states have internal predecessors, (1400), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:05:20,272 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 02:05:20,273 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] [2023-08-04 02:05:20,280 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 02:05:20,477 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-08-04 02:05:20,477 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 02:05:20,477 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 02:05:20,478 INFO L85 PathProgramCache]: Analyzing trace with hash -173959395, now seen corresponding path program 1 times [2023-08-04 02:05:20,478 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 02:05:20,478 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1248208592] [2023-08-04 02:05:20,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 02:05:20,478 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 02:05:20,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 02:05:21,178 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-08-04 02:05:21,178 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 02:05:21,178 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1248208592] [2023-08-04 02:05:21,178 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1248208592] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 02:05:21,178 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [498674708] [2023-08-04 02:05:21,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 02:05:21,179 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 02:05:21,179 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 02:05:21,180 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 02:05:21,182 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 02:05:21,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 02:05:21,266 INFO L262 TraceCheckSpWp]: Trace formula consists of 284 conjuncts, 45 conjunts are in the unsatisfiable core [2023-08-04 02:05:21,268 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 02:05:22,365 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-08-04 02:05:22,365 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 02:05:23,395 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-08-04 02:05:23,395 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [498674708] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 02:05:23,395 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 02:05:23,395 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 11 [2023-08-04 02:05:23,396 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1659671986] [2023-08-04 02:05:23,396 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 02:05:23,396 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-08-04 02:05:23,397 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 02:05:23,398 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-08-04 02:05:23,398 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2023-08-04 02:05:23,557 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 246 out of 670 [2023-08-04 02:05:23,559 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 40 transitions, 180 flow. Second operand has 12 states, 12 states have (on average 250.25) internal successors, (3003), 12 states have internal predecessors, (3003), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:05:23,559 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 02:05:23,559 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 246 of 670 [2023-08-04 02:05:23,559 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 02:05:24,187 INFO L124 PetriNetUnfolderBase]: 725/1402 cut-off events. [2023-08-04 02:05:24,187 INFO L125 PetriNetUnfolderBase]: For 1073/1073 co-relation queries the response was YES. [2023-08-04 02:05:24,190 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3657 conditions, 1402 events. 725/1402 cut-off events. For 1073/1073 co-relation queries the response was YES. Maximal size of possible extension queue 56. Compared 6952 event pairs, 121 based on Foata normal form. 1/1396 useless extension candidates. Maximal degree in co-relation 3550. Up to 670 conditions per place. [2023-08-04 02:05:24,191 INFO L140 encePairwiseOnDemand]: 661/670 looper letters, 50 selfloop transitions, 5 changer transitions 40/99 dead transitions. [2023-08-04 02:05:24,191 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 99 transitions, 649 flow [2023-08-04 02:05:24,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-08-04 02:05:24,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-08-04 02:05:24,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 2053 transitions. [2023-08-04 02:05:24,204 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3830223880597015 [2023-08-04 02:05:24,204 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 2053 transitions. [2023-08-04 02:05:24,204 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 2053 transitions. [2023-08-04 02:05:24,205 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 02:05:24,205 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 2053 transitions. [2023-08-04 02:05:24,208 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 256.625) internal successors, (2053), 8 states have internal predecessors, (2053), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:05:24,214 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 670.0) internal successors, (6030), 9 states have internal predecessors, (6030), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:05:24,215 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 670.0) internal successors, (6030), 9 states have internal predecessors, (6030), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:05:24,215 INFO L175 Difference]: Start difference. First operand has 56 places, 40 transitions, 180 flow. Second operand 8 states and 2053 transitions. [2023-08-04 02:05:24,215 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 99 transitions, 649 flow [2023-08-04 02:05:24,220 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 99 transitions, 628 flow, removed 2 selfloop flow, removed 3 redundant places. [2023-08-04 02:05:24,221 INFO L231 Difference]: Finished difference. Result has 67 places, 44 transitions, 224 flow [2023-08-04 02:05:24,221 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=670, PETRI_DIFFERENCE_MINUEND_FLOW=172, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=224, PETRI_PLACES=67, PETRI_TRANSITIONS=44} [2023-08-04 02:05:24,222 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 27 predicate places. [2023-08-04 02:05:24,222 INFO L495 AbstractCegarLoop]: Abstraction has has 67 places, 44 transitions, 224 flow [2023-08-04 02:05:24,223 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 250.25) internal successors, (3003), 12 states have internal predecessors, (3003), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:05:24,223 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 02:05:24,223 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] [2023-08-04 02:05:24,243 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 02:05:24,429 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2023-08-04 02:05:24,430 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 02:05:24,430 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 02:05:24,430 INFO L85 PathProgramCache]: Analyzing trace with hash 13401721, now seen corresponding path program 2 times [2023-08-04 02:05:24,430 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 02:05:24,430 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1564121395] [2023-08-04 02:05:24,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 02:05:24,430 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 02:05:24,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 02:05:25,181 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-08-04 02:05:25,181 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 02:05:25,182 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1564121395] [2023-08-04 02:05:25,182 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1564121395] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 02:05:25,182 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 02:05:25,182 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-08-04 02:05:25,182 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1970884770] [2023-08-04 02:05:25,182 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 02:05:25,182 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-04 02:05:25,182 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 02:05:25,182 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-04 02:05:25,183 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2023-08-04 02:05:25,321 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 246 out of 670 [2023-08-04 02:05:25,322 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 44 transitions, 224 flow. Second operand has 7 states, 7 states have (on average 250.14285714285714) internal successors, (1751), 7 states have internal predecessors, (1751), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:05:25,322 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 02:05:25,322 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 246 of 670 [2023-08-04 02:05:25,322 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 02:05:25,668 INFO L124 PetriNetUnfolderBase]: 235/565 cut-off events. [2023-08-04 02:05:25,674 INFO L125 PetriNetUnfolderBase]: For 911/911 co-relation queries the response was YES. [2023-08-04 02:05:25,675 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1936 conditions, 565 events. 235/565 cut-off events. For 911/911 co-relation queries the response was YES. Maximal size of possible extension queue 28. Compared 2666 event pairs, 42 based on Foata normal form. 1/561 useless extension candidates. Maximal degree in co-relation 1917. Up to 443 conditions per place. [2023-08-04 02:05:25,676 INFO L140 encePairwiseOnDemand]: 661/670 looper letters, 0 selfloop transitions, 0 changer transitions 61/61 dead transitions. [2023-08-04 02:05:25,676 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 61 transitions, 432 flow [2023-08-04 02:05:25,676 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-08-04 02:05:25,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-08-04 02:05:25,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 2019 transitions. [2023-08-04 02:05:25,680 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37667910447761194 [2023-08-04 02:05:25,680 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 2019 transitions. [2023-08-04 02:05:25,680 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 2019 transitions. [2023-08-04 02:05:25,681 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 02:05:25,681 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 2019 transitions. [2023-08-04 02:05:25,684 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 252.375) internal successors, (2019), 8 states have internal predecessors, (2019), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:05:25,688 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 670.0) internal successors, (6030), 9 states have internal predecessors, (6030), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:05:25,689 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 670.0) internal successors, (6030), 9 states have internal predecessors, (6030), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:05:25,689 INFO L175 Difference]: Start difference. First operand has 67 places, 44 transitions, 224 flow. Second operand 8 states and 2019 transitions. [2023-08-04 02:05:25,689 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 61 transitions, 432 flow [2023-08-04 02:05:25,691 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 61 transitions, 426 flow, removed 3 selfloop flow, removed 3 redundant places. [2023-08-04 02:05:25,692 INFO L231 Difference]: Finished difference. Result has 66 places, 0 transitions, 0 flow [2023-08-04 02:05:25,692 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=670, PETRI_DIFFERENCE_MINUEND_FLOW=214, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=0, PETRI_PLACES=66, PETRI_TRANSITIONS=0} [2023-08-04 02:05:25,693 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 26 predicate places. [2023-08-04 02:05:25,693 INFO L495 AbstractCegarLoop]: Abstraction has has 66 places, 0 transitions, 0 flow [2023-08-04 02:05:25,694 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 250.14285714285714) internal successors, (1751), 7 states have internal predecessors, (1751), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:05:25,694 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2023-08-04 02:05:25,694 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2023-08-04 02:05:25,694 INFO L445 BasicCegarLoop]: Path program histogram: [2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 02:05:25,694 INFO L307 ceAbstractionStarter]: Result for error location AllErrorsAtOnce was SAFE (2/2) [2023-08-04 02:05:25,695 INFO L228 ceAbstractionStarter]: Analysis of concurrent program completed with 2 thread instances [2023-08-04 02:05:25,695 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2023-08-04 02:05:25,698 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 04.08 02:05:25 BasicIcfg [2023-08-04 02:05:25,698 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-08-04 02:05:25,698 INFO L158 Benchmark]: Toolchain (without parser) took 30594.33ms. Allocated memory was 580.9MB in the beginning and 698.4MB in the end (delta: 117.4MB). Free memory was 542.0MB in the beginning and 514.5MB in the end (delta: 27.5MB). Peak memory consumption was 148.1MB. Max. memory is 16.0GB. [2023-08-04 02:05:25,698 INFO L158 Benchmark]: CDTParser took 0.08ms. Allocated memory is still 388.0MB. Free memory is still 337.7MB. There was no memory consumed. Max. memory is 16.0GB. [2023-08-04 02:05:25,698 INFO L158 Benchmark]: CACSL2BoogieTranslator took 185.57ms. Allocated memory is still 580.9MB. Free memory was 541.6MB in the beginning and 530.2MB in the end (delta: 11.4MB). Peak memory consumption was 10.5MB. Max. memory is 16.0GB. [2023-08-04 02:05:25,698 INFO L158 Benchmark]: Boogie Procedure Inliner took 25.83ms. Allocated memory is still 580.9MB. Free memory was 530.2MB in the beginning and 527.9MB in the end (delta: 2.4MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. [2023-08-04 02:05:25,699 INFO L158 Benchmark]: Boogie Preprocessor took 19.05ms. Allocated memory is still 580.9MB. Free memory was 527.9MB in the beginning and 526.6MB in the end (delta: 1.3MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. [2023-08-04 02:05:25,699 INFO L158 Benchmark]: RCFGBuilder took 441.07ms. Allocated memory is still 580.9MB. Free memory was 526.2MB in the beginning and 507.7MB in the end (delta: 18.5MB). Peak memory consumption was 18.9MB. Max. memory is 16.0GB. [2023-08-04 02:05:25,699 INFO L158 Benchmark]: TraceAbstraction took 29916.21ms. Allocated memory was 580.9MB in the beginning and 698.4MB in the end (delta: 117.4MB). Free memory was 506.9MB in the beginning and 514.5MB in the end (delta: -7.6MB). Peak memory consumption was 112.4MB. Max. memory is 16.0GB. [2023-08-04 02:05:25,700 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 388.0MB. Free memory is still 337.7MB. There was no memory consumed. Max. memory is 16.0GB. * CACSL2BoogieTranslator took 185.57ms. Allocated memory is still 580.9MB. Free memory was 541.6MB in the beginning and 530.2MB in the end (delta: 11.4MB). Peak memory consumption was 10.5MB. Max. memory is 16.0GB. * Boogie Procedure Inliner took 25.83ms. Allocated memory is still 580.9MB. Free memory was 530.2MB in the beginning and 527.9MB in the end (delta: 2.4MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. * Boogie Preprocessor took 19.05ms. Allocated memory is still 580.9MB. Free memory was 527.9MB in the beginning and 526.6MB in the end (delta: 1.3MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. * RCFGBuilder took 441.07ms. Allocated memory is still 580.9MB. Free memory was 526.2MB in the beginning and 507.7MB in the end (delta: 18.5MB). Peak memory consumption was 18.9MB. Max. memory is 16.0GB. * TraceAbstraction took 29916.21ms. Allocated memory was 580.9MB in the beginning and 698.4MB in the end (delta: 117.4MB). Free memory was 506.9MB in the beginning and 514.5MB in the end (delta: -7.6MB). Peak memory consumption was 112.4MB. Max. memory is 16.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 4.9s, 201 PlacesBefore, 30 PlacesAfterwards, 215 TransitionsBefore, 30 TransitionsAfterwards, 17014 CoEnabledTransitionPairs, 8 FixpointIterations, 43 TrivialSequentialCompositions, 127 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 50 ConcurrentYvCompositions, 14 ChoiceCompositions, 234 TotalNumberOfCompositions, 16783 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 16137, independent: 16090, independent conditional: 0, independent unconditional: 16090, dependent: 47, dependent conditional: 0, dependent unconditional: 47, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: SyntacticIndependenceRelation.Independence Queries: [ total: 10019, independent: 9997, independent conditional: 0, independent unconditional: 9997, dependent: 22, dependent conditional: 0, dependent unconditional: 22, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Cache Queries: [ total: 16137, independent: 6093, independent conditional: 0, independent unconditional: 6093, dependent: 25, dependent conditional: 0, dependent unconditional: 25, unknown: 10019, unknown conditional: 0, unknown unconditional: 10019] , Statistics on independence cache: Total cache size (in pairs): 34, Positive cache size: 30, Positive conditional cache size: 0, Positive unconditional cache size: 30, Negative cache size: 4, Negative conditional cache size: 0, Negative unconditional cache size: 4, Unknown cache size: 0, Unknown conditional cache size: 0, Unknown unconditional cache size: 0 - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 6.8s, 293 PlacesBefore, 40 PlacesAfterwards, 315 TransitionsBefore, 40 TransitionsAfterwards, 53580 CoEnabledTransitionPairs, 8 FixpointIterations, 43 TrivialSequentialCompositions, 208 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 91 ConcurrentYvCompositions, 22 ChoiceCompositions, 364 TotalNumberOfCompositions, 56826 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 54534, independent: 54480, independent conditional: 0, independent unconditional: 54480, dependent: 54, dependent conditional: 0, dependent unconditional: 54, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: SyntacticIndependenceRelation.Independence Queries: [ total: 31842, independent: 31811, independent conditional: 0, independent unconditional: 31811, dependent: 31, dependent conditional: 0, dependent unconditional: 31, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Cache Queries: [ total: 54534, independent: 22669, independent conditional: 0, independent unconditional: 22669, dependent: 23, dependent conditional: 0, dependent unconditional: 23, unknown: 31842, unknown conditional: 0, unknown unconditional: 31842] , Statistics on independence cache: Total cache size (in pairs): 63, Positive cache size: 57, Positive conditional cache size: 0, Positive unconditional cache size: 57, Negative cache size: 6, Negative conditional cache size: 0, Negative unconditional cache size: 6, Unknown cache size: 0, Unknown conditional cache size: 0, Unknown unconditional cache size: 0 - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 6.4s, 293 PlacesBefore, 40 PlacesAfterwards, 315 TransitionsBefore, 40 TransitionsAfterwards, 53580 CoEnabledTransitionPairs, 8 FixpointIterations, 43 TrivialSequentialCompositions, 206 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 84 ConcurrentYvCompositions, 22 ChoiceCompositions, 355 TotalNumberOfCompositions, 55620 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 53113, independent: 53053, independent conditional: 0, independent unconditional: 53053, dependent: 60, dependent conditional: 0, dependent unconditional: 60, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: SyntacticIndependenceRelation.Independence Queries: [ total: 31516, independent: 31486, independent conditional: 0, independent unconditional: 31486, dependent: 30, dependent conditional: 0, dependent unconditional: 30, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Cache Queries: [ total: 53113, independent: 21567, independent conditional: 0, independent unconditional: 21567, dependent: 30, dependent conditional: 0, dependent unconditional: 30, unknown: 31516, unknown conditional: 0, unknown unconditional: 31516] , Statistics on independence cache: Total cache size (in pairs): 71, Positive cache size: 65, Positive conditional cache size: 0, Positive unconditional cache size: 65, Negative cache size: 6, Negative conditional cache size: 0, Negative unconditional cache size: 6, Unknown cache size: 0, Unknown conditional cache size: 0, Unknown unconditional cache size: 0 - PositiveResult [Line: 77]: 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 5 procedures, 285 locations, 3 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: 5.1s, OverallIterations: 1, TraceHistogramMax: 2, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 0.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 5.0s, HoareTripleCheckerStatistics: , PredicateUnifierStatistics: No data available, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=82occurred 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 7 procedures, 373 locations, 3 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: 8.8s, OverallIterations: 4, TraceHistogramMax: 3, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 0.5s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 7.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 132 SdHoareTripleChecker+Valid, 0.2s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 99 mSDsluCounter, 8 SdHoareTripleChecker+Invalid, 0.1s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 0 mSDsCounter, 12 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 233 IncrementalHoareTripleChecker+Invalid, 245 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 12 mSolverCounterUnsat, 8 mSDtfsCounter, 233 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 73 GetRequests, 60 SyntacticMatches, 2 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=128occurred in iteration=0, InterpolantAutomatonStates: 17, 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, 0.1s SatisfiabilityAnalysisTime, 0.3s InterpolantComputationTime, 106 NumberOfCodeBlocks, 106 NumberOfCodeBlocksAsserted, 7 NumberOfCheckSat, 114 ConstructedInterpolants, 0 QuantifiedInterpolants, 218 SizeOfPredicates, 0 NumberOfNonLiveVariables, 345 ConjunctsInSsa, 11 ConjunctsInUnsatCore, 8 InterpolantComputations, 3 PerfectInterpolantSequences, 66/79 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 7 procedures, 373 locations, 3 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: 15.9s, OverallIterations: 10, TraceHistogramMax: 2, PathProgramHistogramMax: 2, EmptinessCheckTime: 0.0s, AutomataDifference: 3.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 6.5s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 634 SdHoareTripleChecker+Valid, 1.0s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 506 mSDsluCounter, 414 SdHoareTripleChecker+Invalid, 0.8s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 387 mSDsCounter, 62 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 1765 IncrementalHoareTripleChecker+Invalid, 1827 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 62 mSolverCounterUnsat, 27 mSDtfsCounter, 1765 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 433 GetRequests, 376 SyntacticMatches, 11 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.8s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=224occurred in iteration=9, InterpolantAutomatonStates: 44, 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, 0.3s SatisfiabilityAnalysisTime, 3.8s InterpolantComputationTime, 494 NumberOfCodeBlocks, 494 NumberOfCodeBlocksAsserted, 18 NumberOfCheckSat, 644 ConstructedInterpolants, 0 QuantifiedInterpolants, 6052 SizeOfPredicates, 31 NumberOfNonLiveVariables, 1484 ConjunctsInSsa, 63 ConjunctsInUnsatCore, 23 InterpolantComputations, 5 PerfectInterpolantSequences, 214/235 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 02:05:25,729 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...