/usr/bin/java -Xmx16000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s /storage/repos/CAV22/benchmarks/svcomp-Reach-32bit-Automizer_Default.epf --traceabstraction.order.of.the.error.locations.to.be.checked PROGRAM_FIRST -tc /storage/repos/CAV22/benchmarks/AutomizerCInline.xml -i /storage/repos/CAV22/benchmarks/increased_bounds/weaver_unroll-3.wvr_bound2.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-19404b3-m [2023-08-04 09:53:48,914 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-08-04 09:53:48,970 INFO L114 SettingsManager]: Loading settings from /storage/repos/CAV22/benchmarks/svcomp-Reach-32bit-Automizer_Default.epf [2023-08-04 09:53:48,975 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-08-04 09:53:48,975 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-08-04 09:53:48,976 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Translation Mode: [2023-08-04 09:53:48,976 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Checked method. Library mode if empty. [2023-08-04 09:53:48,997 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-04 09:53:48,997 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-04 09:53:49,000 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-04 09:53:49,000 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-04 09:53:49,000 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-04 09:53:49,001 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-04 09:53:49,002 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-08-04 09:53:49,002 INFO L153 SettingsManager]: * Use SBE=true [2023-08-04 09:53:49,002 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-04 09:53:49,002 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-04 09:53:49,003 INFO L153 SettingsManager]: * sizeof long=4 [2023-08-04 09:53:49,003 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-04 09:53:49,003 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-08-04 09:53:49,003 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-08-04 09:53:49,003 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-04 09:53:49,003 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-04 09:53:49,003 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-04 09:53:49,004 INFO L153 SettingsManager]: * sizeof long double=12 [2023-08-04 09:53:49,004 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-08-04 09:53:49,005 INFO L153 SettingsManager]: * Use constant arrays=true [2023-08-04 09:53:49,005 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-04 09:53:49,005 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-04 09:53:49,005 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-04 09:53:49,006 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-04 09:53:49,006 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-04 09:53:49,006 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-04 09:53:49,006 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-04 09:53:49,006 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-04 09:53:49,006 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-04 09:53:49,007 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-04 09:53:49,007 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-08-04 09:53:49,007 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-04 09:53:49,007 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-04 09:53:49,007 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-04 09:53:49,007 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Order of the error locations to be checked -> PROGRAM_FIRST [2023-08-04 09:53:49,169 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-04 09:53:49,183 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-04 09:53:49,185 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-04 09:53:49,186 INFO L270 PluginConnector]: Initializing CDTParser... [2023-08-04 09:53:49,188 INFO L274 PluginConnector]: CDTParser initialized [2023-08-04 09:53:49,189 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/CAV22/benchmarks/increased_bounds/weaver_unroll-3.wvr_bound2.c [2023-08-04 09:53:50,226 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-08-04 09:53:50,366 INFO L384 CDTParser]: Found 1 translation units. [2023-08-04 09:53:50,367 INFO L180 CDTParser]: Scanning /storage/repos/CAV22/benchmarks/increased_bounds/weaver_unroll-3.wvr_bound2.c [2023-08-04 09:53:50,385 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1076c3186/4d348669c358402d9c945f3721b8dd61/FLAG79f01eb5f [2023-08-04 09:53:50,397 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1076c3186/4d348669c358402d9c945f3721b8dd61 [2023-08-04 09:53:50,399 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-04 09:53:50,400 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-08-04 09:53:50,401 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-04 09:53:50,401 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-04 09:53:50,404 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-04 09:53:50,404 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.08 09:53:50" (1/1) ... [2023-08-04 09:53:50,405 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2199ddd5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 09:53:50, skipping insertion in model container [2023-08-04 09:53:50,405 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.08 09:53:50" (1/1) ... [2023-08-04 09:53:50,426 INFO L176 MainTranslator]: Built tables and reachable declarations [2023-08-04 09:53:50,622 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_unroll-3.wvr_bound2.c[2662,2675] [2023-08-04 09:53:50,625 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-04 09:53:50,631 INFO L201 MainTranslator]: Completed pre-run [2023-08-04 09:53:50,645 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_unroll-3.wvr_bound2.c[2662,2675] [2023-08-04 09:53:50,647 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-04 09:53:50,656 INFO L206 MainTranslator]: Completed translation [2023-08-04 09:53:50,656 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 09:53:50 WrapperNode [2023-08-04 09:53:50,656 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-04 09:53:50,657 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-04 09:53:50,657 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-04 09:53:50,657 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-04 09:53:50,668 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 09:53:50" (1/1) ... [2023-08-04 09:53:50,687 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 09:53:50" (1/1) ... [2023-08-04 09:53:50,723 INFO L138 Inliner]: procedures = 24, calls = 34, calls flagged for inlining = 12, calls inlined = 12, statements flattened = 179 [2023-08-04 09:53:50,724 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-04 09:53:50,724 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-04 09:53:50,724 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-04 09:53:50,724 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-08-04 09:53:50,733 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 09:53:50" (1/1) ... [2023-08-04 09:53:50,734 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 09:53:50" (1/1) ... [2023-08-04 09:53:50,746 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 09:53:50" (1/1) ... [2023-08-04 09:53:50,747 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 09:53:50" (1/1) ... [2023-08-04 09:53:50,752 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 09:53:50" (1/1) ... [2023-08-04 09:53:50,756 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 09:53:50" (1/1) ... [2023-08-04 09:53:50,757 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 09:53:50" (1/1) ... [2023-08-04 09:53:50,758 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 09:53:50" (1/1) ... [2023-08-04 09:53:50,760 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-04 09:53:50,761 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-04 09:53:50,761 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-08-04 09:53:50,761 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-08-04 09:53:50,762 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 09:53:50" (1/1) ... [2023-08-04 09:53:50,767 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-04 09:53:50,777 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 09:53:50,802 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 09:53:50,803 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 09:53:50,826 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-04 09:53:50,826 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-08-04 09:53:50,826 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-08-04 09:53:50,826 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-08-04 09:53:50,826 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-08-04 09:53:50,826 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-04 09:53:50,826 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-04 09:53:50,826 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-04 09:53:50,826 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-08-04 09:53:50,826 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-04 09:53:50,827 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-04 09:53:50,827 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-04 09:53:50,827 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-04 09:53:50,828 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 09:53:50,898 INFO L236 CfgBuilder]: Building ICFG [2023-08-04 09:53:50,900 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-04 09:53:51,128 INFO L277 CfgBuilder]: Performing block encoding [2023-08-04 09:53:51,134 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-04 09:53:51,134 INFO L302 CfgBuilder]: Removed 7 assume(true) statements. [2023-08-04 09:53:51,135 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.08 09:53:51 BoogieIcfgContainer [2023-08-04 09:53:51,136 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-04 09:53:51,137 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-04 09:53:51,137 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-08-04 09:53:51,139 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-08-04 09:53:51,139 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 04.08 09:53:50" (1/3) ... [2023-08-04 09:53:51,140 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@26b70397 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.08 09:53:51, skipping insertion in model container [2023-08-04 09:53:51,140 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 09:53:50" (2/3) ... [2023-08-04 09:53:51,140 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@26b70397 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.08 09:53:51, skipping insertion in model container [2023-08-04 09:53:51,140 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.08 09:53:51" (3/3) ... [2023-08-04 09:53:51,144 INFO L112 eAbstractionObserver]: Analyzing ICFG weaver_unroll-3.wvr_bound2.c [2023-08-04 09:53:51,149 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-08-04 09:53:51,156 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-04 09:53:51,156 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-08-04 09:53:51,156 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-04 09:53:51,236 INFO L144 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2023-08-04 09:53:51,268 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 182 places, 200 transitions, 422 flow [2023-08-04 09:53:51,367 INFO L124 PetriNetUnfolderBase]: 45/375 cut-off events. [2023-08-04 09:53:51,367 INFO L125 PetriNetUnfolderBase]: For 8/8 co-relation queries the response was YES. [2023-08-04 09:53:51,375 INFO L83 FinitePrefix]: Finished finitePrefix Result has 395 conditions, 375 events. 45/375 cut-off events. For 8/8 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 1275 event pairs, 0 based on Foata normal form. 0/320 useless extension candidates. Maximal degree in co-relation 201. Up to 8 conditions per place. [2023-08-04 09:53:51,375 INFO L82 GeneralOperation]: Start removeDead. Operand has 182 places, 200 transitions, 422 flow [2023-08-04 09:53:51,379 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 182 places, 200 transitions, 422 flow [2023-08-04 09:53:51,381 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-04 09:53:51,389 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 182 places, 200 transitions, 422 flow [2023-08-04 09:53:51,391 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 182 places, 200 transitions, 422 flow [2023-08-04 09:53:51,391 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 182 places, 200 transitions, 422 flow [2023-08-04 09:53:51,433 INFO L124 PetriNetUnfolderBase]: 45/375 cut-off events. [2023-08-04 09:53:51,433 INFO L125 PetriNetUnfolderBase]: For 8/8 co-relation queries the response was YES. [2023-08-04 09:53:51,437 INFO L83 FinitePrefix]: Finished finitePrefix Result has 395 conditions, 375 events. 45/375 cut-off events. For 8/8 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 1275 event pairs, 0 based on Foata normal form. 0/320 useless extension candidates. Maximal degree in co-relation 201. Up to 8 conditions per place. [2023-08-04 09:53:51,442 INFO L119 LiptonReduction]: Number of co-enabled transitions 8386 [2023-08-04 09:53:55,545 INFO L134 LiptonReduction]: Checked pairs total: 11483 [2023-08-04 09:53:55,546 INFO L136 LiptonReduction]: Total number of compositions: 208 [2023-08-04 09:53:55,556 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-04 09:53:55,566 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;@3130dc46, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-04 09:53:55,566 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-04 09:53:55,569 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-04 09:53:55,569 INFO L124 PetriNetUnfolderBase]: 1/14 cut-off events. [2023-08-04 09:53:55,569 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 09:53:55,569 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 09:53:55,569 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-08-04 09:53:55,570 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 09:53:55,574 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 09:53:55,574 INFO L85 PathProgramCache]: Analyzing trace with hash -2038358687, now seen corresponding path program 1 times [2023-08-04 09:53:55,580 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 09:53:55,580 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [189594547] [2023-08-04 09:53:55,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:53:55,581 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 09:53:55,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:53:55,779 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 09:53:55,779 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 09:53:55,779 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [189594547] [2023-08-04 09:53:55,780 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [189594547] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 09:53:55,780 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 09:53:55,780 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-04 09:53:55,781 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [407068562] [2023-08-04 09:53:55,782 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 09:53:55,788 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 09:53:55,792 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 09:53:55,808 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 09:53:55,808 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-04 09:53:55,824 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 173 out of 408 [2023-08-04 09:53:55,827 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 36 places, 41 transitions, 104 flow. Second operand has 3 states, 3 states have (on average 175.0) internal successors, (525), 3 states have internal predecessors, (525), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:53:55,828 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 09:53:55,828 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 173 of 408 [2023-08-04 09:53:55,828 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 09:53:55,953 INFO L124 PetriNetUnfolderBase]: 705/1105 cut-off events. [2023-08-04 09:53:55,953 INFO L125 PetriNetUnfolderBase]: For 49/49 co-relation queries the response was YES. [2023-08-04 09:53:55,954 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2230 conditions, 1105 events. 705/1105 cut-off events. For 49/49 co-relation queries the response was YES. Maximal size of possible extension queue 71. Compared 4909 event pairs, 460 based on Foata normal form. 0/745 useless extension candidates. Maximal degree in co-relation 1909. Up to 1065 conditions per place. [2023-08-04 09:53:55,959 INFO L140 encePairwiseOnDemand]: 401/408 looper letters, 32 selfloop transitions, 2 changer transitions 3/41 dead transitions. [2023-08-04 09:53:55,959 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 37 places, 41 transitions, 174 flow [2023-08-04 09:53:55,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 09:53:55,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 09:53:55,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 559 transitions. [2023-08-04 09:53:55,973 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45669934640522875 [2023-08-04 09:53:55,974 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 559 transitions. [2023-08-04 09:53:55,974 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 559 transitions. [2023-08-04 09:53:55,977 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 09:53:55,978 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 559 transitions. [2023-08-04 09:53:55,982 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 186.33333333333334) internal successors, (559), 3 states have internal predecessors, (559), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:53:55,986 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 408.0) internal successors, (1632), 4 states have internal predecessors, (1632), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:53:55,987 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 408.0) internal successors, (1632), 4 states have internal predecessors, (1632), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:53:55,988 INFO L175 Difference]: Start difference. First operand has 36 places, 41 transitions, 104 flow. Second operand 3 states and 559 transitions. [2023-08-04 09:53:55,989 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 37 places, 41 transitions, 174 flow [2023-08-04 09:53:55,991 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 37 places, 41 transitions, 174 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-04 09:53:55,993 INFO L231 Difference]: Finished difference. Result has 38 places, 35 transitions, 96 flow [2023-08-04 09:53:55,994 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=408, PETRI_DIFFERENCE_MINUEND_FLOW=96, PETRI_DIFFERENCE_MINUEND_PLACES=35, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=96, PETRI_PLACES=38, PETRI_TRANSITIONS=35} [2023-08-04 09:53:55,996 INFO L281 CegarLoopForPetriNet]: 36 programPoint places, 2 predicate places. [2023-08-04 09:53:55,997 INFO L495 AbstractCegarLoop]: Abstraction has has 38 places, 35 transitions, 96 flow [2023-08-04 09:53:55,997 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 175.0) internal successors, (525), 3 states have internal predecessors, (525), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:53:55,997 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 09:53:55,998 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 09:53:55,998 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-04 09:53:55,998 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 09:53:55,999 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 09:53:55,999 INFO L85 PathProgramCache]: Analyzing trace with hash -148738033, now seen corresponding path program 1 times [2023-08-04 09:53:55,999 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 09:53:56,000 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [134124207] [2023-08-04 09:53:56,000 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:53:56,000 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 09:53:56,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:53:56,088 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 09:53:56,088 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 09:53:56,088 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [134124207] [2023-08-04 09:53:56,089 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [134124207] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 09:53:56,089 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1091357642] [2023-08-04 09:53:56,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:53:56,089 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 09:53:56,089 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 09:53:56,101 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 09:53:56,101 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 09:53:56,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:53:56,157 INFO L262 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 09:53:56,160 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 09:53:56,189 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 09:53:56,189 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 09:53:56,189 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1091357642] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 09:53:56,189 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 09:53:56,189 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2023-08-04 09:53:56,190 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1658645941] [2023-08-04 09:53:56,190 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 09:53:56,190 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 09:53:56,191 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 09:53:56,191 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 09:53:56,191 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 09:53:56,204 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 173 out of 408 [2023-08-04 09:53:56,205 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 38 places, 35 transitions, 96 flow. Second operand has 3 states, 3 states have (on average 176.0) internal successors, (528), 3 states have internal predecessors, (528), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:53:56,205 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 09:53:56,205 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 173 of 408 [2023-08-04 09:53:56,205 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 09:53:56,304 INFO L124 PetriNetUnfolderBase]: 701/1092 cut-off events. [2023-08-04 09:53:56,304 INFO L125 PetriNetUnfolderBase]: For 50/50 co-relation queries the response was YES. [2023-08-04 09:53:56,305 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2213 conditions, 1092 events. 701/1092 cut-off events. For 50/50 co-relation queries the response was YES. Maximal size of possible extension queue 65. Compared 4735 event pairs, 412 based on Foata normal form. 0/744 useless extension candidates. Maximal degree in co-relation 1887. Up to 982 conditions per place. [2023-08-04 09:53:56,308 INFO L140 encePairwiseOnDemand]: 405/408 looper letters, 39 selfloop transitions, 2 changer transitions 1/46 dead transitions. [2023-08-04 09:53:56,308 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 38 places, 46 transitions, 202 flow [2023-08-04 09:53:56,308 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 09:53:56,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 09:53:56,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 562 transitions. [2023-08-04 09:53:56,310 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4591503267973856 [2023-08-04 09:53:56,311 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 562 transitions. [2023-08-04 09:53:56,312 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 562 transitions. [2023-08-04 09:53:56,313 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 09:53:56,316 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 562 transitions. [2023-08-04 09:53:56,317 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 187.33333333333334) internal successors, (562), 3 states have internal predecessors, (562), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:53:56,319 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 408.0) internal successors, (1632), 4 states have internal predecessors, (1632), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:53:56,319 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 408.0) internal successors, (1632), 4 states have internal predecessors, (1632), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:53:56,319 INFO L175 Difference]: Start difference. First operand has 38 places, 35 transitions, 96 flow. Second operand 3 states and 562 transitions. [2023-08-04 09:53:56,319 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 38 places, 46 transitions, 202 flow [2023-08-04 09:53:56,321 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 34 places, 46 transitions, 192 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-08-04 09:53:56,321 INFO L231 Difference]: Finished difference. Result has 35 places, 35 transitions, 94 flow [2023-08-04 09:53:56,321 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=408, PETRI_DIFFERENCE_MINUEND_FLOW=86, PETRI_DIFFERENCE_MINUEND_PLACES=32, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=35, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=94, PETRI_PLACES=35, PETRI_TRANSITIONS=35} [2023-08-04 09:53:56,322 INFO L281 CegarLoopForPetriNet]: 36 programPoint places, -1 predicate places. [2023-08-04 09:53:56,322 INFO L495 AbstractCegarLoop]: Abstraction has has 35 places, 35 transitions, 94 flow [2023-08-04 09:53:56,322 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 176.0) internal successors, (528), 3 states have internal predecessors, (528), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:53:56,323 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 09:53:56,323 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 09:53:56,329 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 09:53:56,529 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 09:53:56,529 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 09:53:56,530 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 09:53:56,530 INFO L85 PathProgramCache]: Analyzing trace with hash -1741338424, now seen corresponding path program 1 times [2023-08-04 09:53:56,530 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 09:53:56,530 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1995498263] [2023-08-04 09:53:56,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:53:56,530 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 09:53:56,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:53:56,601 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 09:53:56,602 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 09:53:56,602 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1995498263] [2023-08-04 09:53:56,602 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1995498263] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 09:53:56,602 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1223548268] [2023-08-04 09:53:56,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:53:56,602 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 09:53:56,602 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 09:53:56,605 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 09:53:56,607 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 09:53:56,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:53:56,652 INFO L262 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 09:53:56,653 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 09:53:56,658 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 09:53:56,658 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 09:53:56,658 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1223548268] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 09:53:56,658 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 09:53:56,658 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2023-08-04 09:53:56,658 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [654375333] [2023-08-04 09:53:56,658 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 09:53:56,659 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 09:53:56,659 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 09:53:56,659 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 09:53:56,659 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 09:53:56,670 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 173 out of 408 [2023-08-04 09:53:56,670 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 35 places, 35 transitions, 94 flow. Second operand has 3 states, 3 states have (on average 177.0) internal successors, (531), 3 states have internal predecessors, (531), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:53:56,670 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 09:53:56,670 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 173 of 408 [2023-08-04 09:53:56,670 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 09:53:56,755 INFO L124 PetriNetUnfolderBase]: 447/723 cut-off events. [2023-08-04 09:53:56,756 INFO L125 PetriNetUnfolderBase]: For 54/54 co-relation queries the response was YES. [2023-08-04 09:53:56,756 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1554 conditions, 723 events. 447/723 cut-off events. For 54/54 co-relation queries the response was YES. Maximal size of possible extension queue 40. Compared 3002 event pairs, 182 based on Foata normal form. 0/545 useless extension candidates. Maximal degree in co-relation 662. Up to 463 conditions per place. [2023-08-04 09:53:56,758 INFO L140 encePairwiseOnDemand]: 405/408 looper letters, 43 selfloop transitions, 2 changer transitions 0/49 dead transitions. [2023-08-04 09:53:56,758 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 37 places, 49 transitions, 216 flow [2023-08-04 09:53:56,758 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 09:53:56,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 09:53:56,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 565 transitions. [2023-08-04 09:53:56,760 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4616013071895425 [2023-08-04 09:53:56,760 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 565 transitions. [2023-08-04 09:53:56,760 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 565 transitions. [2023-08-04 09:53:56,760 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 09:53:56,760 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 565 transitions. [2023-08-04 09:53:56,761 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 188.33333333333334) internal successors, (565), 3 states have internal predecessors, (565), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:53:56,763 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 408.0) internal successors, (1632), 4 states have internal predecessors, (1632), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:53:56,763 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 408.0) internal successors, (1632), 4 states have internal predecessors, (1632), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:53:56,763 INFO L175 Difference]: Start difference. First operand has 35 places, 35 transitions, 94 flow. Second operand 3 states and 565 transitions. [2023-08-04 09:53:56,763 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 37 places, 49 transitions, 216 flow [2023-08-04 09:53:56,764 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 35 places, 49 transitions, 212 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-04 09:53:56,765 INFO L231 Difference]: Finished difference. Result has 36 places, 36 transitions, 102 flow [2023-08-04 09:53:56,765 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=408, PETRI_DIFFERENCE_MINUEND_FLOW=90, PETRI_DIFFERENCE_MINUEND_PLACES=33, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=35, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=102, PETRI_PLACES=36, PETRI_TRANSITIONS=36} [2023-08-04 09:53:56,765 INFO L281 CegarLoopForPetriNet]: 36 programPoint places, 0 predicate places. [2023-08-04 09:53:56,765 INFO L495 AbstractCegarLoop]: Abstraction has has 36 places, 36 transitions, 102 flow [2023-08-04 09:53:56,766 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 177.0) internal successors, (531), 3 states have internal predecessors, (531), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:53:56,766 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 09:53:56,766 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 09:53:56,787 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-08-04 09:53:56,972 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2023-08-04 09:53:56,973 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 09:53:56,973 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 09:53:56,973 INFO L85 PathProgramCache]: Analyzing trace with hash -432762888, now seen corresponding path program 1 times [2023-08-04 09:53:56,973 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 09:53:56,973 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [608297223] [2023-08-04 09:53:56,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:53:56,973 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 09:53:56,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:53:57,058 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 09:53:57,059 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 09:53:57,059 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [608297223] [2023-08-04 09:53:57,059 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [608297223] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 09:53:57,059 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [479675057] [2023-08-04 09:53:57,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:53:57,060 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 09:53:57,060 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 09:53:57,061 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 09:53:57,062 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 09:53:57,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:53:57,119 INFO L262 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 09:53:57,121 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 09:53:57,129 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 09:53:57,130 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 09:53:57,130 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [479675057] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 09:53:57,130 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 09:53:57,130 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [4] total 5 [2023-08-04 09:53:57,130 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [351556342] [2023-08-04 09:53:57,130 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 09:53:57,131 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 09:53:57,131 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 09:53:57,132 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 09:53:57,132 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 09:53:57,139 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 173 out of 408 [2023-08-04 09:53:57,139 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 36 places, 36 transitions, 102 flow. Second operand has 3 states, 3 states have (on average 178.33333333333334) internal successors, (535), 3 states have internal predecessors, (535), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:53:57,139 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 09:53:57,139 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 173 of 408 [2023-08-04 09:53:57,139 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 09:53:57,242 INFO L124 PetriNetUnfolderBase]: 432/696 cut-off events. [2023-08-04 09:53:57,243 INFO L125 PetriNetUnfolderBase]: For 156/156 co-relation queries the response was YES. [2023-08-04 09:53:57,244 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1541 conditions, 696 events. 432/696 cut-off events. For 156/156 co-relation queries the response was YES. Maximal size of possible extension queue 40. Compared 2771 event pairs, 267 based on Foata normal form. 0/546 useless extension candidates. Maximal degree in co-relation 689. Up to 624 conditions per place. [2023-08-04 09:53:57,245 INFO L140 encePairwiseOnDemand]: 405/408 looper letters, 39 selfloop transitions, 2 changer transitions 2/47 dead transitions. [2023-08-04 09:53:57,245 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 38 places, 47 transitions, 210 flow [2023-08-04 09:53:57,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 09:53:57,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 09:53:57,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 562 transitions. [2023-08-04 09:53:57,247 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4591503267973856 [2023-08-04 09:53:57,247 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 562 transitions. [2023-08-04 09:53:57,247 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 562 transitions. [2023-08-04 09:53:57,248 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 09:53:57,248 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 562 transitions. [2023-08-04 09:53:57,249 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 187.33333333333334) internal successors, (562), 3 states have internal predecessors, (562), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:53:57,251 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 408.0) internal successors, (1632), 4 states have internal predecessors, (1632), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:53:57,251 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 408.0) internal successors, (1632), 4 states have internal predecessors, (1632), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:53:57,251 INFO L175 Difference]: Start difference. First operand has 36 places, 36 transitions, 102 flow. Second operand 3 states and 562 transitions. [2023-08-04 09:53:57,252 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 38 places, 47 transitions, 210 flow [2023-08-04 09:53:57,253 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 37 places, 47 transitions, 208 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 09:53:57,253 INFO L231 Difference]: Finished difference. Result has 38 places, 35 transitions, 104 flow [2023-08-04 09:53:57,254 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=408, PETRI_DIFFERENCE_MINUEND_FLOW=100, PETRI_DIFFERENCE_MINUEND_PLACES=35, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=36, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=104, PETRI_PLACES=38, PETRI_TRANSITIONS=35} [2023-08-04 09:53:57,254 INFO L281 CegarLoopForPetriNet]: 36 programPoint places, 2 predicate places. [2023-08-04 09:53:57,254 INFO L495 AbstractCegarLoop]: Abstraction has has 38 places, 35 transitions, 104 flow [2023-08-04 09:53:57,255 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 178.33333333333334) internal successors, (535), 3 states have internal predecessors, (535), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:53:57,255 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 09:53:57,255 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] [2023-08-04 09:53:57,267 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-08-04 09:53:57,464 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 09:53:57,465 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 09:53:57,465 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 09:53:57,465 INFO L85 PathProgramCache]: Analyzing trace with hash 1216891642, now seen corresponding path program 1 times [2023-08-04 09:53:57,465 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 09:53:57,465 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [901387322] [2023-08-04 09:53:57,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:53:57,466 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 09:53:57,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:53:57,520 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 09:53:57,520 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 09:53:57,520 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [901387322] [2023-08-04 09:53:57,521 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [901387322] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 09:53:57,521 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [731241933] [2023-08-04 09:53:57,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:53:57,521 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 09:53:57,521 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 09:53:57,522 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 09:53:57,524 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 09:53:57,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:53:57,587 INFO L262 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 5 conjunts are in the unsatisfiable core [2023-08-04 09:53:57,589 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 09:53:57,622 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-08-04 09:53:57,622 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 09:53:57,622 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [731241933] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 09:53:57,622 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 09:53:57,622 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [4] total 5 [2023-08-04 09:53:57,623 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1156328957] [2023-08-04 09:53:57,623 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 09:53:57,623 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 09:53:57,623 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 09:53:57,624 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 09:53:57,624 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 09:53:57,636 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 173 out of 408 [2023-08-04 09:53:57,637 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 38 places, 35 transitions, 104 flow. Second operand has 3 states, 3 states have (on average 179.66666666666666) internal successors, (539), 3 states have internal predecessors, (539), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:53:57,637 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 09:53:57,637 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 173 of 408 [2023-08-04 09:53:57,637 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 09:53:57,757 INFO L124 PetriNetUnfolderBase]: 432/693 cut-off events. [2023-08-04 09:53:57,757 INFO L125 PetriNetUnfolderBase]: For 104/104 co-relation queries the response was YES. [2023-08-04 09:53:57,758 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1537 conditions, 693 events. 432/693 cut-off events. For 104/104 co-relation queries the response was YES. Maximal size of possible extension queue 40. Compared 2749 event pairs, 287 based on Foata normal form. 1/545 useless extension candidates. Maximal degree in co-relation 1384. Up to 676 conditions per place. [2023-08-04 09:53:57,759 INFO L140 encePairwiseOnDemand]: 405/408 looper letters, 30 selfloop transitions, 2 changer transitions 0/36 dead transitions. [2023-08-04 09:53:57,759 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 40 places, 36 transitions, 170 flow [2023-08-04 09:53:57,760 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 09:53:57,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 09:53:57,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 552 transitions. [2023-08-04 09:53:57,761 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45098039215686275 [2023-08-04 09:53:57,761 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 552 transitions. [2023-08-04 09:53:57,762 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 552 transitions. [2023-08-04 09:53:57,762 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 09:53:57,762 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 552 transitions. [2023-08-04 09:53:57,763 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 184.0) internal successors, (552), 3 states have internal predecessors, (552), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:53:57,764 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 408.0) internal successors, (1632), 4 states have internal predecessors, (1632), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:53:57,765 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 408.0) internal successors, (1632), 4 states have internal predecessors, (1632), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:53:57,765 INFO L175 Difference]: Start difference. First operand has 38 places, 35 transitions, 104 flow. Second operand 3 states and 552 transitions. [2023-08-04 09:53:57,765 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 40 places, 36 transitions, 170 flow [2023-08-04 09:53:57,768 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 38 places, 36 transitions, 166 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-04 09:53:57,768 INFO L231 Difference]: Finished difference. Result has 39 places, 36 transitions, 112 flow [2023-08-04 09:53:57,768 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=408, PETRI_DIFFERENCE_MINUEND_FLOW=100, PETRI_DIFFERENCE_MINUEND_PLACES=36, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=35, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=112, PETRI_PLACES=39, PETRI_TRANSITIONS=36} [2023-08-04 09:53:57,770 INFO L281 CegarLoopForPetriNet]: 36 programPoint places, 3 predicate places. [2023-08-04 09:53:57,770 INFO L495 AbstractCegarLoop]: Abstraction has has 39 places, 36 transitions, 112 flow [2023-08-04 09:53:57,770 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 179.66666666666666) internal successors, (539), 3 states have internal predecessors, (539), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:53:57,770 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 09:53:57,770 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 09:53:57,777 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-08-04 09:53:57,974 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 09:53:57,974 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 09:53:57,975 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 09:53:57,975 INFO L85 PathProgramCache]: Analyzing trace with hash -1815583609, now seen corresponding path program 1 times [2023-08-04 09:53:57,975 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 09:53:57,975 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1721582662] [2023-08-04 09:53:57,975 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:53:57,975 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 09:53:57,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:53:58,034 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-08-04 09:53:58,035 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 09:53:58,035 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1721582662] [2023-08-04 09:53:58,035 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1721582662] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 09:53:58,035 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1460745543] [2023-08-04 09:53:58,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:53:58,035 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 09:53:58,035 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 09:53:58,036 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 09:53:58,038 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 09:53:58,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:53:58,098 INFO L262 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-04 09:53:58,099 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 09:53:58,111 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-08-04 09:53:58,111 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 09:53:58,134 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-08-04 09:53:58,134 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1460745543] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 09:53:58,134 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 09:53:58,134 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 5 [2023-08-04 09:53:58,134 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1148827214] [2023-08-04 09:53:58,134 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 09:53:58,135 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 09:53:58,135 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 09:53:58,136 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 09:53:58,136 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-04 09:53:58,147 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 172 out of 408 [2023-08-04 09:53:58,148 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 39 places, 36 transitions, 112 flow. Second operand has 5 states, 5 states have (on average 177.2) internal successors, (886), 5 states have internal predecessors, (886), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:53:58,148 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 09:53:58,148 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 172 of 408 [2023-08-04 09:53:58,148 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 09:53:58,188 INFO L124 PetriNetUnfolderBase]: 11/27 cut-off events. [2023-08-04 09:53:58,188 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2023-08-04 09:53:58,188 INFO L83 FinitePrefix]: Finished finitePrefix Result has 72 conditions, 27 events. 11/27 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 45 event pairs, 1 based on Foata normal form. 4/26 useless extension candidates. Maximal degree in co-relation 62. Up to 17 conditions per place. [2023-08-04 09:53:58,189 INFO L140 encePairwiseOnDemand]: 405/408 looper letters, 0 selfloop transitions, 0 changer transitions 15/15 dead transitions. [2023-08-04 09:53:58,189 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 21 places, 15 transitions, 72 flow [2023-08-04 09:53:58,189 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 09:53:58,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 09:53:58,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 702 transitions. [2023-08-04 09:53:58,191 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43014705882352944 [2023-08-04 09:53:58,191 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 702 transitions. [2023-08-04 09:53:58,191 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 702 transitions. [2023-08-04 09:53:58,192 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 09:53:58,192 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 702 transitions. [2023-08-04 09:53:58,194 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 175.5) internal successors, (702), 4 states have internal predecessors, (702), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:53:58,196 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 408.0) internal successors, (2040), 5 states have internal predecessors, (2040), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:53:58,198 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 408.0) internal successors, (2040), 5 states have internal predecessors, (2040), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:53:58,198 INFO L175 Difference]: Start difference. First operand has 39 places, 36 transitions, 112 flow. Second operand 4 states and 702 transitions. [2023-08-04 09:53:58,198 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 21 places, 15 transitions, 72 flow [2023-08-04 09:53:58,199 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 19 places, 15 transitions, 66 flow, removed 1 selfloop flow, removed 2 redundant places. [2023-08-04 09:53:58,199 INFO L231 Difference]: Finished difference. Result has 19 places, 0 transitions, 0 flow [2023-08-04 09:53:58,199 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=408, PETRI_DIFFERENCE_MINUEND_FLOW=30, PETRI_DIFFERENCE_MINUEND_PLACES=16, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=11, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=11, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=0, PETRI_PLACES=19, PETRI_TRANSITIONS=0} [2023-08-04 09:53:58,201 INFO L281 CegarLoopForPetriNet]: 36 programPoint places, -17 predicate places. [2023-08-04 09:53:58,201 INFO L495 AbstractCegarLoop]: Abstraction has has 19 places, 0 transitions, 0 flow [2023-08-04 09:53:58,202 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 177.2) internal successors, (886), 5 states have internal predecessors, (886), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:53:58,204 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2023-08-04 09:53:58,226 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 09:53:58,410 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 09:53:58,411 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1] [2023-08-04 09:53:58,414 INFO L307 ceAbstractionStarter]: Result for error location AllErrorsAtOnce was SAFE (1/2) [2023-08-04 09:53:58,419 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 182 places, 200 transitions, 422 flow [2023-08-04 09:53:58,448 INFO L124 PetriNetUnfolderBase]: 45/375 cut-off events. [2023-08-04 09:53:58,448 INFO L125 PetriNetUnfolderBase]: For 8/8 co-relation queries the response was YES. [2023-08-04 09:53:58,449 INFO L83 FinitePrefix]: Finished finitePrefix Result has 395 conditions, 375 events. 45/375 cut-off events. For 8/8 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 1275 event pairs, 0 based on Foata normal form. 0/320 useless extension candidates. Maximal degree in co-relation 201. Up to 8 conditions per place. [2023-08-04 09:53:58,450 INFO L82 GeneralOperation]: Start removeDead. Operand has 182 places, 200 transitions, 422 flow [2023-08-04 09:53:58,451 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 182 places, 200 transitions, 422 flow [2023-08-04 09:53:58,451 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-04 09:53:58,451 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 182 places, 200 transitions, 422 flow [2023-08-04 09:53:58,451 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 182 places, 200 transitions, 422 flow [2023-08-04 09:53:58,451 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 182 places, 200 transitions, 422 flow [2023-08-04 09:53:58,473 INFO L124 PetriNetUnfolderBase]: 45/375 cut-off events. [2023-08-04 09:53:58,473 INFO L125 PetriNetUnfolderBase]: For 8/8 co-relation queries the response was YES. [2023-08-04 09:53:58,474 INFO L83 FinitePrefix]: Finished finitePrefix Result has 395 conditions, 375 events. 45/375 cut-off events. For 8/8 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 1275 event pairs, 0 based on Foata normal form. 0/320 useless extension candidates. Maximal degree in co-relation 201. Up to 8 conditions per place. [2023-08-04 09:53:58,478 INFO L119 LiptonReduction]: Number of co-enabled transitions 8386 [2023-08-04 09:54:01,971 INFO L134 LiptonReduction]: Checked pairs total: 12515 [2023-08-04 09:54:01,971 INFO L136 LiptonReduction]: Total number of compositions: 202 [2023-08-04 09:54:01,980 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-04 09:54:01,981 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;@3130dc46, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-04 09:54:01,981 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2023-08-04 09:54:01,983 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-04 09:54:01,983 INFO L124 PetriNetUnfolderBase]: 3/30 cut-off events. [2023-08-04 09:54:01,983 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 09:54:01,983 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 09:54:01,983 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1] [2023-08-04 09:54:01,983 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-04 09:54:01,984 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 09:54:01,984 INFO L85 PathProgramCache]: Analyzing trace with hash 2098531994, now seen corresponding path program 1 times [2023-08-04 09:54:01,984 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 09:54:01,984 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [502625394] [2023-08-04 09:54:01,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:54:01,984 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 09:54:02,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:54:02,036 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 09:54:02,036 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 09:54:02,036 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [502625394] [2023-08-04 09:54:02,036 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [502625394] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 09:54:02,036 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 09:54:02,036 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-04 09:54:02,036 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1431483889] [2023-08-04 09:54:02,036 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 09:54:02,039 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 09:54:02,039 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 09:54:02,040 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 09:54:02,040 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-04 09:54:02,052 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 173 out of 402 [2023-08-04 09:54:02,052 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 37 places, 41 transitions, 104 flow. Second operand has 3 states, 3 states have (on average 174.66666666666666) internal successors, (524), 3 states have internal predecessors, (524), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:54:02,052 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 09:54:02,052 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 173 of 402 [2023-08-04 09:54:02,052 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 09:54:02,142 INFO L124 PetriNetUnfolderBase]: 815/1294 cut-off events. [2023-08-04 09:54:02,142 INFO L125 PetriNetUnfolderBase]: For 59/59 co-relation queries the response was YES. [2023-08-04 09:54:02,143 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2604 conditions, 1294 events. 815/1294 cut-off events. For 59/59 co-relation queries the response was YES. Maximal size of possible extension queue 88. Compared 6126 event pairs, 537 based on Foata normal form. 42/885 useless extension candidates. Maximal degree in co-relation 2112. Up to 1249 conditions per place. [2023-08-04 09:54:02,145 INFO L140 encePairwiseOnDemand]: 396/402 looper letters, 20 selfloop transitions, 2 changer transitions 13/39 dead transitions. [2023-08-04 09:54:02,145 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 38 places, 39 transitions, 166 flow [2023-08-04 09:54:02,145 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 09:54:02,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 09:54:02,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 556 transitions. [2023-08-04 09:54:02,147 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46102819237147596 [2023-08-04 09:54:02,147 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 556 transitions. [2023-08-04 09:54:02,147 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 556 transitions. [2023-08-04 09:54:02,147 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 09:54:02,147 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 556 transitions. [2023-08-04 09:54:02,148 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 185.33333333333334) internal successors, (556), 3 states have internal predecessors, (556), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:54:02,150 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 402.0) internal successors, (1608), 4 states have internal predecessors, (1608), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:54:02,151 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 402.0) internal successors, (1608), 4 states have internal predecessors, (1608), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:54:02,151 INFO L175 Difference]: Start difference. First operand has 37 places, 41 transitions, 104 flow. Second operand 3 states and 556 transitions. [2023-08-04 09:54:02,151 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 38 places, 39 transitions, 166 flow [2023-08-04 09:54:02,151 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 38 places, 39 transitions, 166 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-04 09:54:02,152 INFO L231 Difference]: Finished difference. Result has 39 places, 26 transitions, 72 flow [2023-08-04 09:54:02,152 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=402, PETRI_DIFFERENCE_MINUEND_FLOW=98, PETRI_DIFFERENCE_MINUEND_PLACES=36, 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=72, PETRI_PLACES=39, PETRI_TRANSITIONS=26} [2023-08-04 09:54:02,152 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 2 predicate places. [2023-08-04 09:54:02,152 INFO L495 AbstractCegarLoop]: Abstraction has has 39 places, 26 transitions, 72 flow [2023-08-04 09:54:02,153 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 174.66666666666666) internal successors, (524), 3 states have internal predecessors, (524), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:54:02,153 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 09:54:02,153 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1] [2023-08-04 09:54:02,153 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-08-04 09:54:02,153 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-04 09:54:02,153 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 09:54:02,153 INFO L85 PathProgramCache]: Analyzing trace with hash 278404138, now seen corresponding path program 1 times [2023-08-04 09:54:02,153 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 09:54:02,153 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [226125595] [2023-08-04 09:54:02,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:54:02,154 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 09:54:02,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-04 09:54:02,186 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-04 09:54:02,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-04 09:54:02,225 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-04 09:54:02,226 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-04 09:54:02,226 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2023-08-04 09:54:02,227 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 2 remaining) [2023-08-04 09:54:02,227 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-08-04 09:54:02,227 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1] [2023-08-04 09:54:02,227 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE,UNKNOWN (2/2) [2023-08-04 09:54:02,228 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-04 09:54:02,228 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-08-04 09:54:02,255 INFO L144 ThreadInstanceAdder]: Constructed 8 joinOtherThreadTransitions. [2023-08-04 09:54:02,257 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 244 places, 270 transitions, 588 flow [2023-08-04 09:54:02,338 INFO L124 PetriNetUnfolderBase]: 159/1099 cut-off events. [2023-08-04 09:54:02,338 INFO L125 PetriNetUnfolderBase]: For 72/72 co-relation queries the response was YES. [2023-08-04 09:54:02,347 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1196 conditions, 1099 events. 159/1099 cut-off events. For 72/72 co-relation queries the response was YES. Maximal size of possible extension queue 27. Compared 6256 event pairs, 1 based on Foata normal form. 0/937 useless extension candidates. Maximal degree in co-relation 662. Up to 32 conditions per place. [2023-08-04 09:54:02,347 INFO L82 GeneralOperation]: Start removeDead. Operand has 244 places, 270 transitions, 588 flow [2023-08-04 09:54:02,352 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 244 places, 270 transitions, 588 flow [2023-08-04 09:54:02,352 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-04 09:54:02,352 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 244 places, 270 transitions, 588 flow [2023-08-04 09:54:02,352 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 244 places, 270 transitions, 588 flow [2023-08-04 09:54:02,352 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 244 places, 270 transitions, 588 flow [2023-08-04 09:54:02,434 INFO L124 PetriNetUnfolderBase]: 159/1099 cut-off events. [2023-08-04 09:54:02,434 INFO L125 PetriNetUnfolderBase]: For 72/72 co-relation queries the response was YES. [2023-08-04 09:54:02,443 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1196 conditions, 1099 events. 159/1099 cut-off events. For 72/72 co-relation queries the response was YES. Maximal size of possible extension queue 27. Compared 6256 event pairs, 1 based on Foata normal form. 0/937 useless extension candidates. Maximal degree in co-relation 662. Up to 32 conditions per place. [2023-08-04 09:54:02,468 INFO L119 LiptonReduction]: Number of co-enabled transitions 26192 [2023-08-04 09:54:06,413 INFO L134 LiptonReduction]: Checked pairs total: 49291 [2023-08-04 09:54:06,414 INFO L136 LiptonReduction]: Total number of compositions: 255 [2023-08-04 09:54:06,416 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-04 09:54:06,416 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;@3130dc46, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-04 09:54:06,416 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-04 09:54:06,418 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-04 09:54:06,419 INFO L124 PetriNetUnfolderBase]: 1/15 cut-off events. [2023-08-04 09:54:06,419 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 09:54:06,419 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 09:54:06,419 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-08-04 09:54:06,419 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 09:54:06,419 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 09:54:06,419 INFO L85 PathProgramCache]: Analyzing trace with hash 13317757, now seen corresponding path program 1 times [2023-08-04 09:54:06,419 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 09:54:06,420 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1229827973] [2023-08-04 09:54:06,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:54:06,420 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 09:54:06,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:54:06,448 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 09:54:06,448 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 09:54:06,448 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1229827973] [2023-08-04 09:54:06,448 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1229827973] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 09:54:06,448 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 09:54:06,448 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-04 09:54:06,448 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1219687826] [2023-08-04 09:54:06,448 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 09:54:06,449 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 09:54:06,449 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 09:54:06,449 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 09:54:06,449 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-04 09:54:06,458 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 231 out of 525 [2023-08-04 09:54:06,459 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 73 transitions, 194 flow. Second operand has 3 states, 3 states have (on average 233.0) internal successors, (699), 3 states have internal predecessors, (699), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:54:06,459 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 09:54:06,459 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 231 of 525 [2023-08-04 09:54:06,459 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 09:54:22,172 INFO L124 PetriNetUnfolderBase]: 241557/301139 cut-off events. [2023-08-04 09:54:22,172 INFO L125 PetriNetUnfolderBase]: For 19031/19031 co-relation queries the response was YES. [2023-08-04 09:54:22,669 INFO L83 FinitePrefix]: Finished finitePrefix Result has 608401 conditions, 301139 events. 241557/301139 cut-off events. For 19031/19031 co-relation queries the response was YES. Maximal size of possible extension queue 7225. Compared 1726011 event pairs, 141613 based on Foata normal form. 16792/215817 useless extension candidates. Maximal degree in co-relation 200076. Up to 298967 conditions per place. [2023-08-04 09:54:23,756 INFO L140 encePairwiseOnDemand]: 517/525 looper letters, 62 selfloop transitions, 2 changer transitions 2/74 dead transitions. [2023-08-04 09:54:23,757 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 74 transitions, 324 flow [2023-08-04 09:54:23,757 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 09:54:23,757 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 09:54:23,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 763 transitions. [2023-08-04 09:54:23,759 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48444444444444446 [2023-08-04 09:54:23,759 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 763 transitions. [2023-08-04 09:54:23,759 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 763 transitions. [2023-08-04 09:54:23,759 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 09:54:23,759 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 763 transitions. [2023-08-04 09:54:23,760 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 254.33333333333334) internal successors, (763), 3 states have internal predecessors, (763), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:54:23,762 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 525.0) internal successors, (2100), 4 states have internal predecessors, (2100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:54:23,762 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 525.0) internal successors, (2100), 4 states have internal predecessors, (2100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:54:23,762 INFO L175 Difference]: Start difference. First operand has 65 places, 73 transitions, 194 flow. Second operand 3 states and 763 transitions. [2023-08-04 09:54:23,762 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 74 transitions, 324 flow [2023-08-04 09:54:23,771 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 74 transitions, 324 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-04 09:54:23,773 INFO L231 Difference]: Finished difference. Result has 67 places, 67 transitions, 184 flow [2023-08-04 09:54:23,774 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=525, PETRI_DIFFERENCE_MINUEND_FLOW=184, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=68, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=66, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=184, PETRI_PLACES=67, PETRI_TRANSITIONS=67} [2023-08-04 09:54:23,775 INFO L281 CegarLoopForPetriNet]: 65 programPoint places, 2 predicate places. [2023-08-04 09:54:23,775 INFO L495 AbstractCegarLoop]: Abstraction has has 67 places, 67 transitions, 184 flow [2023-08-04 09:54:23,775 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 233.0) internal successors, (699), 3 states have internal predecessors, (699), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:54:23,775 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 09:54:23,775 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 09:54:23,775 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-08-04 09:54:23,775 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 09:54:23,776 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 09:54:23,776 INFO L85 PathProgramCache]: Analyzing trace with hash 177757664, now seen corresponding path program 1 times [2023-08-04 09:54:23,776 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 09:54:23,776 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1180018308] [2023-08-04 09:54:23,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:54:23,776 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 09:54:23,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:54:23,802 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 09:54:23,803 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 09:54:23,803 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1180018308] [2023-08-04 09:54:23,803 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1180018308] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 09:54:23,803 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1423236000] [2023-08-04 09:54:23,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:54:23,803 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 09:54:23,803 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 09:54:23,804 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 09:54:23,806 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 09:54:23,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:54:23,864 INFO L262 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 09:54:23,865 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 09:54:23,869 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 09:54:23,869 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 09:54:23,869 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1423236000] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 09:54:23,869 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 09:54:23,869 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2023-08-04 09:54:23,871 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [884800736] [2023-08-04 09:54:23,871 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 09:54:23,871 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 09:54:23,872 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 09:54:23,872 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 09:54:23,872 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 09:54:23,878 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 231 out of 525 [2023-08-04 09:54:23,878 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 67 transitions, 184 flow. Second operand has 3 states, 3 states have (on average 234.0) internal successors, (702), 3 states have internal predecessors, (702), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:54:23,878 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 09:54:23,879 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 231 of 525 [2023-08-04 09:54:23,879 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 09:54:39,350 INFO L124 PetriNetUnfolderBase]: 240257/301062 cut-off events. [2023-08-04 09:54:39,350 INFO L125 PetriNetUnfolderBase]: For 16450/16450 co-relation queries the response was YES. [2023-08-04 09:54:39,958 INFO L83 FinitePrefix]: Finished finitePrefix Result has 606501 conditions, 301062 events. 240257/301062 cut-off events. For 16450/16450 co-relation queries the response was YES. Maximal size of possible extension queue 7289. Compared 1768798 event pairs, 125638 based on Foata normal form. 0/199336 useless extension candidates. Maximal degree in co-relation 606455. Up to 295881 conditions per place. [2023-08-04 09:54:40,792 INFO L140 encePairwiseOnDemand]: 522/525 looper letters, 79 selfloop transitions, 2 changer transitions 0/89 dead transitions. [2023-08-04 09:54:40,792 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 89 transitions, 390 flow [2023-08-04 09:54:40,792 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 09:54:40,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 09:54:40,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 774 transitions. [2023-08-04 09:54:40,794 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49142857142857144 [2023-08-04 09:54:40,794 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 774 transitions. [2023-08-04 09:54:40,794 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 774 transitions. [2023-08-04 09:54:40,794 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 09:54:40,794 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 774 transitions. [2023-08-04 09:54:40,795 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 258.0) internal successors, (774), 3 states have internal predecessors, (774), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:54:40,797 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 525.0) internal successors, (2100), 4 states have internal predecessors, (2100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:54:40,798 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 525.0) internal successors, (2100), 4 states have internal predecessors, (2100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:54:40,798 INFO L175 Difference]: Start difference. First operand has 67 places, 67 transitions, 184 flow. Second operand 3 states and 774 transitions. [2023-08-04 09:54:40,798 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 89 transitions, 390 flow [2023-08-04 09:54:40,824 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 89 transitions, 382 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-08-04 09:54:40,825 INFO L231 Difference]: Finished difference. Result has 65 places, 68 transitions, 188 flow [2023-08-04 09:54:40,825 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=525, PETRI_DIFFERENCE_MINUEND_FLOW=176, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=67, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=65, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=188, PETRI_PLACES=65, PETRI_TRANSITIONS=68} [2023-08-04 09:54:40,826 INFO L281 CegarLoopForPetriNet]: 65 programPoint places, 0 predicate places. [2023-08-04 09:54:40,826 INFO L495 AbstractCegarLoop]: Abstraction has has 65 places, 68 transitions, 188 flow [2023-08-04 09:54:40,826 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 234.0) internal successors, (702), 3 states have internal predecessors, (702), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:54:40,826 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 09:54:40,826 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 09:54:40,832 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2023-08-04 09:54:41,030 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 09:54:41,030 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 09:54:41,031 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 09:54:41,031 INFO L85 PathProgramCache]: Analyzing trace with hash -2020433935, now seen corresponding path program 1 times [2023-08-04 09:54:41,031 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 09:54:41,031 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1050152027] [2023-08-04 09:54:41,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:54:41,031 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 09:54:41,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:54:41,063 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 09:54:41,063 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 09:54:41,063 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1050152027] [2023-08-04 09:54:41,063 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1050152027] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 09:54:41,064 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [427573140] [2023-08-04 09:54:41,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:54:41,064 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 09:54:41,064 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 09:54:41,065 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 09:54:41,072 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 09:54:41,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:54:41,144 INFO L262 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 09:54:41,145 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 09:54:41,164 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 09:54:41,164 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 09:54:41,164 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [427573140] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 09:54:41,164 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 09:54:41,164 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2023-08-04 09:54:41,164 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1872386760] [2023-08-04 09:54:41,164 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 09:54:41,165 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 09:54:41,165 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 09:54:41,165 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 09:54:41,165 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 09:54:41,173 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 231 out of 525 [2023-08-04 09:54:41,174 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 68 transitions, 188 flow. Second operand has 3 states, 3 states have (on average 235.0) internal successors, (705), 3 states have internal predecessors, (705), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:54:41,174 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 09:54:41,174 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 231 of 525 [2023-08-04 09:54:41,174 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 09:54:52,439 INFO L124 PetriNetUnfolderBase]: 177097/225904 cut-off events. [2023-08-04 09:54:52,439 INFO L125 PetriNetUnfolderBase]: For 15370/15370 co-relation queries the response was YES. [2023-08-04 09:54:52,857 INFO L83 FinitePrefix]: Finished finitePrefix Result has 464708 conditions, 225904 events. 177097/225904 cut-off events. For 15370/15370 co-relation queries the response was YES. Maximal size of possible extension queue 5647. Compared 1380026 event pairs, 84047 based on Foata normal form. 0/159351 useless extension candidates. Maximal degree in co-relation 150909. Up to 149907 conditions per place. [2023-08-04 09:54:53,456 INFO L140 encePairwiseOnDemand]: 522/525 looper letters, 95 selfloop transitions, 2 changer transitions 0/105 dead transitions. [2023-08-04 09:54:53,456 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 105 transitions, 466 flow [2023-08-04 09:54:53,457 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 09:54:53,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 09:54:53,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 789 transitions. [2023-08-04 09:54:53,474 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5009523809523809 [2023-08-04 09:54:53,474 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 789 transitions. [2023-08-04 09:54:53,474 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 789 transitions. [2023-08-04 09:54:53,474 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 09:54:53,474 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 789 transitions. [2023-08-04 09:54:53,475 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 263.0) internal successors, (789), 3 states have internal predecessors, (789), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:54:53,490 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 525.0) internal successors, (2100), 4 states have internal predecessors, (2100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:54:53,491 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 525.0) internal successors, (2100), 4 states have internal predecessors, (2100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:54:53,491 INFO L175 Difference]: Start difference. First operand has 65 places, 68 transitions, 188 flow. Second operand 3 states and 789 transitions. [2023-08-04 09:54:53,491 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 105 transitions, 466 flow [2023-08-04 09:54:53,508 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 105 transitions, 464 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 09:54:53,509 INFO L231 Difference]: Finished difference. Result has 67 places, 69 transitions, 198 flow [2023-08-04 09:54:53,509 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=525, PETRI_DIFFERENCE_MINUEND_FLOW=186, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=68, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=66, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=198, PETRI_PLACES=67, PETRI_TRANSITIONS=69} [2023-08-04 09:54:53,510 INFO L281 CegarLoopForPetriNet]: 65 programPoint places, 2 predicate places. [2023-08-04 09:54:53,510 INFO L495 AbstractCegarLoop]: Abstraction has has 67 places, 69 transitions, 198 flow [2023-08-04 09:54:53,510 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 235.0) internal successors, (705), 3 states have internal predecessors, (705), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:54:53,510 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 09:54:53,510 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] [2023-08-04 09:54:53,515 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 09:54:53,714 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 09:54:53,714 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 09:54:53,715 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 09:54:53,715 INFO L85 PathProgramCache]: Analyzing trace with hash -2035401635, now seen corresponding path program 1 times [2023-08-04 09:54:53,715 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 09:54:53,715 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [973049632] [2023-08-04 09:54:53,715 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:54:53,715 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 09:54:53,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:54:53,752 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 09:54:53,753 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 09:54:53,753 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [973049632] [2023-08-04 09:54:53,753 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [973049632] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 09:54:53,753 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [868124798] [2023-08-04 09:54:53,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:54:53,753 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 09:54:53,753 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 09:54:53,754 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 09:54:53,756 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 09:54:53,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:54:53,819 INFO L262 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 09:54:53,820 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 09:54:53,825 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 09:54:53,825 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 09:54:53,825 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [868124798] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 09:54:53,825 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 09:54:53,825 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [4] total 5 [2023-08-04 09:54:53,825 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [624524739] [2023-08-04 09:54:53,825 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 09:54:53,825 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 09:54:53,826 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 09:54:53,826 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 09:54:53,826 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 09:54:53,832 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 231 out of 525 [2023-08-04 09:54:53,833 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 69 transitions, 198 flow. Second operand has 3 states, 3 states have (on average 236.33333333333334) internal successors, (709), 3 states have internal predecessors, (709), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:54:53,833 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 09:54:53,833 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 231 of 525 [2023-08-04 09:54:53,833 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 09:55:04,724 INFO L124 PetriNetUnfolderBase]: 170707/216739 cut-off events. [2023-08-04 09:55:04,724 INFO L125 PetriNetUnfolderBase]: For 50020/50020 co-relation queries the response was YES. [2023-08-04 09:55:05,126 INFO L83 FinitePrefix]: Finished finitePrefix Result has 461619 conditions, 216739 events. 170707/216739 cut-off events. For 50020/50020 co-relation queries the response was YES. Maximal size of possible extension queue 5323. Compared 1279782 event pairs, 108124 based on Foata normal form. 0/157244 useless extension candidates. Maximal degree in co-relation 175880. Up to 188010 conditions per place. [2023-08-04 09:55:05,637 INFO L140 encePairwiseOnDemand]: 522/525 looper letters, 96 selfloop transitions, 2 changer transitions 0/106 dead transitions. [2023-08-04 09:55:05,637 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 106 transitions, 478 flow [2023-08-04 09:55:05,637 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 09:55:05,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 09:55:05,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 789 transitions. [2023-08-04 09:55:05,640 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5009523809523809 [2023-08-04 09:55:05,640 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 789 transitions. [2023-08-04 09:55:05,640 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 789 transitions. [2023-08-04 09:55:05,640 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 09:55:05,640 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 789 transitions. [2023-08-04 09:55:05,642 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 263.0) internal successors, (789), 3 states have internal predecessors, (789), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:55:05,644 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 525.0) internal successors, (2100), 4 states have internal predecessors, (2100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:55:05,645 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 525.0) internal successors, (2100), 4 states have internal predecessors, (2100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:55:05,645 INFO L175 Difference]: Start difference. First operand has 67 places, 69 transitions, 198 flow. Second operand 3 states and 789 transitions. [2023-08-04 09:55:05,645 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 106 transitions, 478 flow [2023-08-04 09:55:06,153 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 106 transitions, 476 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 09:55:06,154 INFO L231 Difference]: Finished difference. Result has 69 places, 70 transitions, 208 flow [2023-08-04 09:55:06,155 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=525, PETRI_DIFFERENCE_MINUEND_FLOW=196, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=69, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=208, PETRI_PLACES=69, PETRI_TRANSITIONS=70} [2023-08-04 09:55:06,155 INFO L281 CegarLoopForPetriNet]: 65 programPoint places, 4 predicate places. [2023-08-04 09:55:06,155 INFO L495 AbstractCegarLoop]: Abstraction has has 69 places, 70 transitions, 208 flow [2023-08-04 09:55:06,155 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 236.33333333333334) internal successors, (709), 3 states have internal predecessors, (709), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:55:06,155 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 09:55:06,155 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 09:55:06,161 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 09:55:06,358 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2023-08-04 09:55:06,358 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 09:55:06,358 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 09:55:06,359 INFO L85 PathProgramCache]: Analyzing trace with hash 1087063397, now seen corresponding path program 1 times [2023-08-04 09:55:06,359 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 09:55:06,359 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [215686022] [2023-08-04 09:55:06,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:55:06,359 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 09:55:06,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:55:06,391 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 09:55:06,391 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 09:55:06,391 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [215686022] [2023-08-04 09:55:06,391 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [215686022] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 09:55:06,391 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [571457942] [2023-08-04 09:55:06,391 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:55:06,392 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 09:55:06,392 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 09:55:06,392 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 09:55:06,394 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 09:55:06,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:55:06,453 INFO L262 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 5 conjunts are in the unsatisfiable core [2023-08-04 09:55:06,454 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 09:55:06,466 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-08-04 09:55:06,467 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 09:55:06,467 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [571457942] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 09:55:06,467 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 09:55:06,467 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [4] total 5 [2023-08-04 09:55:06,467 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1621013050] [2023-08-04 09:55:06,467 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 09:55:06,468 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 09:55:06,468 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 09:55:06,468 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 09:55:06,468 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 09:55:06,480 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 231 out of 525 [2023-08-04 09:55:06,481 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 70 transitions, 208 flow. Second operand has 3 states, 3 states have (on average 237.66666666666666) internal successors, (713), 3 states have internal predecessors, (713), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:55:06,481 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 09:55:06,481 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 231 of 525 [2023-08-04 09:55:06,481 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 09:55:17,647 INFO L124 PetriNetUnfolderBase]: 170707/216733 cut-off events. [2023-08-04 09:55:17,647 INFO L125 PetriNetUnfolderBase]: For 43402/43402 co-relation queries the response was YES. [2023-08-04 09:55:18,217 INFO L83 FinitePrefix]: Finished finitePrefix Result has 463164 conditions, 216733 events. 170707/216733 cut-off events. For 43402/43402 co-relation queries the response was YES. Maximal size of possible extension queue 5323. Compared 1276044 event pairs, 122638 based on Foata normal form. 1/157706 useless extension candidates. Maximal degree in co-relation 392500. Up to 214201 conditions per place. [2023-08-04 09:55:18,777 INFO L140 encePairwiseOnDemand]: 522/525 looper letters, 61 selfloop transitions, 2 changer transitions 0/71 dead transitions. [2023-08-04 09:55:18,777 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 71 transitions, 336 flow [2023-08-04 09:55:18,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 09:55:18,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 09:55:18,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 753 transitions. [2023-08-04 09:55:18,779 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4780952380952381 [2023-08-04 09:55:18,779 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 753 transitions. [2023-08-04 09:55:18,779 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 753 transitions. [2023-08-04 09:55:18,779 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 09:55:18,779 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 753 transitions. [2023-08-04 09:55:18,780 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 251.0) internal successors, (753), 3 states have internal predecessors, (753), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:55:18,782 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 525.0) internal successors, (2100), 4 states have internal predecessors, (2100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:55:18,782 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 525.0) internal successors, (2100), 4 states have internal predecessors, (2100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:55:18,782 INFO L175 Difference]: Start difference. First operand has 69 places, 70 transitions, 208 flow. Second operand 3 states and 753 transitions. [2023-08-04 09:55:18,782 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 71 transitions, 336 flow [2023-08-04 09:55:20,594 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 71 transitions, 334 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 09:55:20,595 INFO L231 Difference]: Finished difference. Result has 71 places, 71 transitions, 218 flow [2023-08-04 09:55:20,595 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=525, PETRI_DIFFERENCE_MINUEND_FLOW=206, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=70, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=218, PETRI_PLACES=71, PETRI_TRANSITIONS=71} [2023-08-04 09:55:20,595 INFO L281 CegarLoopForPetriNet]: 65 programPoint places, 6 predicate places. [2023-08-04 09:55:20,595 INFO L495 AbstractCegarLoop]: Abstraction has has 71 places, 71 transitions, 218 flow [2023-08-04 09:55:20,596 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 237.66666666666666) internal successors, (713), 3 states have internal predecessors, (713), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:55:20,596 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 09:55:20,596 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 09:55:20,600 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 09:55:20,797 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-08-04 09:55:20,798 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 09:55:20,800 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 09:55:20,801 INFO L85 PathProgramCache]: Analyzing trace with hash -1123841492, now seen corresponding path program 1 times [2023-08-04 09:55:20,801 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 09:55:20,801 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [208834169] [2023-08-04 09:55:20,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:55:20,801 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 09:55:20,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:55:20,970 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-08-04 09:55:20,970 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 09:55:20,970 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [208834169] [2023-08-04 09:55:20,970 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [208834169] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 09:55:20,970 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1021011549] [2023-08-04 09:55:20,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:55:20,971 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 09:55:20,971 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 09:55:20,987 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 09:55:21,005 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 09:55:21,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:55:21,084 INFO L262 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-04 09:55:21,085 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 09:55:21,095 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-08-04 09:55:21,095 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 09:55:21,111 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-08-04 09:55:21,111 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1021011549] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 09:55:21,111 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 09:55:21,111 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 5 [2023-08-04 09:55:21,112 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [622347344] [2023-08-04 09:55:21,112 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 09:55:21,113 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 09:55:21,113 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 09:55:21,114 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 09:55:21,114 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-04 09:55:21,125 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 230 out of 525 [2023-08-04 09:55:21,126 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 71 transitions, 218 flow. Second operand has 5 states, 5 states have (on average 235.0) internal successors, (1175), 5 states have internal predecessors, (1175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:55:21,126 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 09:55:21,126 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 230 of 525 [2023-08-04 09:55:21,126 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 09:55:31,488 INFO L124 PetriNetUnfolderBase]: 157542/198877 cut-off events. [2023-08-04 09:55:31,488 INFO L125 PetriNetUnfolderBase]: For 34850/34850 co-relation queries the response was YES. [2023-08-04 09:55:31,999 INFO L83 FinitePrefix]: Finished finitePrefix Result has 424580 conditions, 198877 events. 157542/198877 cut-off events. For 34850/34850 co-relation queries the response was YES. Maximal size of possible extension queue 4999. Compared 1139928 event pairs, 64487 based on Foata normal form. 5/143663 useless extension candidates. Maximal degree in co-relation 424561. Up to 196716 conditions per place. [2023-08-04 09:55:32,513 INFO L140 encePairwiseOnDemand]: 521/525 looper letters, 74 selfloop transitions, 3 changer transitions 1/86 dead transitions. [2023-08-04 09:55:32,514 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 86 transitions, 404 flow [2023-08-04 09:55:32,514 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 09:55:32,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 09:55:32,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 995 transitions. [2023-08-04 09:55:32,516 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4738095238095238 [2023-08-04 09:55:32,516 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 995 transitions. [2023-08-04 09:55:32,516 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 995 transitions. [2023-08-04 09:55:32,516 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 09:55:32,516 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 995 transitions. [2023-08-04 09:55:32,518 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 248.75) internal successors, (995), 4 states have internal predecessors, (995), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:55:32,519 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 525.0) internal successors, (2625), 5 states have internal predecessors, (2625), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:55:32,520 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 525.0) internal successors, (2625), 5 states have internal predecessors, (2625), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:55:32,520 INFO L175 Difference]: Start difference. First operand has 71 places, 71 transitions, 218 flow. Second operand 4 states and 995 transitions. [2023-08-04 09:55:32,520 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 86 transitions, 404 flow [2023-08-04 09:55:33,555 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 73 places, 86 transitions, 400 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-08-04 09:55:33,557 INFO L231 Difference]: Finished difference. Result has 75 places, 71 transitions, 228 flow [2023-08-04 09:55:33,558 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=525, PETRI_DIFFERENCE_MINUEND_FLOW=214, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=71, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=228, PETRI_PLACES=75, PETRI_TRANSITIONS=71} [2023-08-04 09:55:33,558 INFO L281 CegarLoopForPetriNet]: 65 programPoint places, 10 predicate places. [2023-08-04 09:55:33,558 INFO L495 AbstractCegarLoop]: Abstraction has has 75 places, 71 transitions, 228 flow [2023-08-04 09:55:33,559 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 235.0) internal successors, (1175), 5 states have internal predecessors, (1175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:55:33,559 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 09:55:33,559 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 09:55:33,562 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2023-08-04 09:55:33,762 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2023-08-04 09:55:33,762 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 09:55:33,763 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 09:55:33,763 INFO L85 PathProgramCache]: Analyzing trace with hash 271772309, now seen corresponding path program 1 times [2023-08-04 09:55:33,763 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 09:55:33,763 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [351607296] [2023-08-04 09:55:33,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:55:33,763 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 09:55:33,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:55:33,814 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-08-04 09:55:33,814 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 09:55:33,814 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [351607296] [2023-08-04 09:55:33,814 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [351607296] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 09:55:33,814 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1192513445] [2023-08-04 09:55:33,814 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:55:33,814 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 09:55:33,814 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 09:55:33,831 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 09:55:33,833 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 09:55:33,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:55:33,923 INFO L262 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-04 09:55:33,924 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 09:55:33,934 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-08-04 09:55:33,935 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 09:55:33,950 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-08-04 09:55:33,950 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1192513445] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 09:55:33,950 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 09:55:33,950 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 5 [2023-08-04 09:55:33,951 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [115027312] [2023-08-04 09:55:33,951 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 09:55:33,951 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 09:55:33,951 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 09:55:33,952 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 09:55:33,952 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-04 09:55:33,962 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 230 out of 525 [2023-08-04 09:55:33,963 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 71 transitions, 228 flow. Second operand has 5 states, 5 states have (on average 235.2) internal successors, (1176), 5 states have internal predecessors, (1176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:55:33,964 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 09:55:33,964 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 230 of 525 [2023-08-04 09:55:33,964 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 09:55:43,975 INFO L124 PetriNetUnfolderBase]: 153218/195338 cut-off events. [2023-08-04 09:55:43,976 INFO L125 PetriNetUnfolderBase]: For 16666/16666 co-relation queries the response was YES. [2023-08-04 09:55:44,531 INFO L83 FinitePrefix]: Finished finitePrefix Result has 414486 conditions, 195338 events. 153218/195338 cut-off events. For 16666/16666 co-relation queries the response was YES. Maximal size of possible extension queue 5084. Compared 1166630 event pairs, 42595 based on Foata normal form. 360/142262 useless extension candidates. Maximal degree in co-relation 414459. Up to 142551 conditions per place. [2023-08-04 09:55:45,187 INFO L140 encePairwiseOnDemand]: 521/525 looper letters, 112 selfloop transitions, 3 changer transitions 1/124 dead transitions. [2023-08-04 09:55:45,187 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 124 transitions, 566 flow [2023-08-04 09:55:45,188 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 09:55:45,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 09:55:45,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1033 transitions. [2023-08-04 09:55:45,189 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4919047619047619 [2023-08-04 09:55:45,189 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1033 transitions. [2023-08-04 09:55:45,189 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1033 transitions. [2023-08-04 09:55:45,190 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 09:55:45,190 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1033 transitions. [2023-08-04 09:55:45,191 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 258.25) internal successors, (1033), 4 states have internal predecessors, (1033), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:55:45,193 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 525.0) internal successors, (2625), 5 states have internal predecessors, (2625), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:55:45,193 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 525.0) internal successors, (2625), 5 states have internal predecessors, (2625), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:55:45,193 INFO L175 Difference]: Start difference. First operand has 75 places, 71 transitions, 228 flow. Second operand 4 states and 1033 transitions. [2023-08-04 09:55:45,193 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 124 transitions, 566 flow [2023-08-04 09:55:50,660 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 124 transitions, 557 flow, removed 1 selfloop flow, removed 3 redundant places. [2023-08-04 09:55:50,661 INFO L231 Difference]: Finished difference. Result has 77 places, 71 transitions, 233 flow [2023-08-04 09:55:50,661 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=525, PETRI_DIFFERENCE_MINUEND_FLOW=219, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=71, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=233, PETRI_PLACES=77, PETRI_TRANSITIONS=71} [2023-08-04 09:55:50,661 INFO L281 CegarLoopForPetriNet]: 65 programPoint places, 12 predicate places. [2023-08-04 09:55:50,661 INFO L495 AbstractCegarLoop]: Abstraction has has 77 places, 71 transitions, 233 flow [2023-08-04 09:55:50,662 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 235.2) internal successors, (1176), 5 states have internal predecessors, (1176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:55:50,662 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 09:55:50,662 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 09:55:50,666 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 09:55:50,865 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-08-04 09:55:50,865 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 09:55:50,866 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 09:55:50,866 INFO L85 PathProgramCache]: Analyzing trace with hash -2128226135, now seen corresponding path program 1 times [2023-08-04 09:55:50,866 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 09:55:50,866 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [411755830] [2023-08-04 09:55:50,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:55:50,866 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 09:55:50,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:55:50,909 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2023-08-04 09:55:50,910 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 09:55:50,910 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [411755830] [2023-08-04 09:55:50,910 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [411755830] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 09:55:50,910 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [421692379] [2023-08-04 09:55:50,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:55:50,910 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 09:55:50,910 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 09:55:50,911 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 09:55:50,913 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-08-04 09:55:50,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:55:50,990 INFO L262 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-04 09:55:50,994 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 09:55:51,003 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2023-08-04 09:55:51,003 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 09:55:51,014 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2023-08-04 09:55:51,014 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [421692379] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 09:55:51,014 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 09:55:51,014 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 5 [2023-08-04 09:55:51,014 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [672931078] [2023-08-04 09:55:51,014 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 09:55:51,015 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 09:55:51,016 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 09:55:51,016 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 09:55:51,016 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-04 09:55:51,026 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 230 out of 525 [2023-08-04 09:55:51,037 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 77 places, 71 transitions, 233 flow. Second operand has 5 states, 5 states have (on average 235.4) internal successors, (1177), 5 states have internal predecessors, (1177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:55:51,037 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 09:55:51,037 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 230 of 525 [2023-08-04 09:55:51,037 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 09:55:58,517 INFO L124 PetriNetUnfolderBase]: 112406/143332 cut-off events. [2023-08-04 09:55:58,517 INFO L125 PetriNetUnfolderBase]: For 59146/59146 co-relation queries the response was YES. [2023-08-04 09:55:58,896 INFO L83 FinitePrefix]: Finished finitePrefix Result has 317155 conditions, 143332 events. 112406/143332 cut-off events. For 59146/59146 co-relation queries the response was YES. Maximal size of possible extension queue 3739. Compared 840604 event pairs, 30530 based on Foata normal form. 2304/105819 useless extension candidates. Maximal degree in co-relation 317129. Up to 60486 conditions per place. [2023-08-04 09:55:59,287 INFO L140 encePairwiseOnDemand]: 521/525 looper letters, 127 selfloop transitions, 4 changer transitions 0/139 dead transitions. [2023-08-04 09:55:59,288 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 80 places, 139 transitions, 640 flow [2023-08-04 09:55:59,288 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 09:55:59,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 09:55:59,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1048 transitions. [2023-08-04 09:55:59,290 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4990476190476191 [2023-08-04 09:55:59,290 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1048 transitions. [2023-08-04 09:55:59,290 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1048 transitions. [2023-08-04 09:55:59,290 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 09:55:59,290 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1048 transitions. [2023-08-04 09:55:59,292 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 262.0) internal successors, (1048), 4 states have internal predecessors, (1048), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:55:59,293 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 525.0) internal successors, (2625), 5 states have internal predecessors, (2625), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:55:59,294 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 525.0) internal successors, (2625), 5 states have internal predecessors, (2625), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:55:59,294 INFO L175 Difference]: Start difference. First operand has 77 places, 71 transitions, 233 flow. Second operand 4 states and 1048 transitions. [2023-08-04 09:55:59,294 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 80 places, 139 transitions, 640 flow [2023-08-04 09:56:00,074 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 77 places, 139 transitions, 630 flow, removed 1 selfloop flow, removed 3 redundant places. [2023-08-04 09:56:00,075 INFO L231 Difference]: Finished difference. Result has 79 places, 72 transitions, 244 flow [2023-08-04 09:56:00,075 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=525, PETRI_DIFFERENCE_MINUEND_FLOW=224, PETRI_DIFFERENCE_MINUEND_PLACES=74, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=71, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=244, PETRI_PLACES=79, PETRI_TRANSITIONS=72} [2023-08-04 09:56:00,075 INFO L281 CegarLoopForPetriNet]: 65 programPoint places, 14 predicate places. [2023-08-04 09:56:00,075 INFO L495 AbstractCegarLoop]: Abstraction has has 79 places, 72 transitions, 244 flow [2023-08-04 09:56:00,076 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 235.4) internal successors, (1177), 5 states have internal predecessors, (1177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:56:00,076 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 09:56:00,076 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 09:56:00,088 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-08-04 09:56:00,279 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2023-08-04 09:56:00,282 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 09:56:00,282 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 09:56:00,282 INFO L85 PathProgramCache]: Analyzing trace with hash 157711741, now seen corresponding path program 1 times [2023-08-04 09:56:00,282 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 09:56:00,282 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1726480777] [2023-08-04 09:56:00,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:56:00,283 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 09:56:00,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:56:00,340 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-08-04 09:56:00,340 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 09:56:00,340 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1726480777] [2023-08-04 09:56:00,340 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1726480777] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 09:56:00,340 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1026398115] [2023-08-04 09:56:00,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:56:00,341 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 09:56:00,341 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 09:56:00,345 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 09:56:00,347 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-08-04 09:56:00,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:56:00,607 INFO L262 TraceCheckSpWp]: Trace formula consists of 219 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-04 09:56:00,608 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 09:56:00,621 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-08-04 09:56:00,621 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 09:56:00,630 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-08-04 09:56:00,630 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1026398115] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 09:56:00,630 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 09:56:00,630 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 4 [2023-08-04 09:56:00,630 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [567113955] [2023-08-04 09:56:00,630 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 09:56:00,631 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 09:56:00,631 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 09:56:00,631 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 09:56:00,631 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-04 09:56:00,641 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 230 out of 525 [2023-08-04 09:56:00,641 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 79 places, 72 transitions, 244 flow. Second operand has 5 states, 5 states have (on average 235.8) internal successors, (1179), 5 states have internal predecessors, (1179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:56:00,641 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 09:56:00,641 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 230 of 525 [2023-08-04 09:56:00,642 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 09:56:08,913 INFO L124 PetriNetUnfolderBase]: 112365/142517 cut-off events. [2023-08-04 09:56:08,913 INFO L125 PetriNetUnfolderBase]: For 82857/82857 co-relation queries the response was YES. [2023-08-04 09:56:09,298 INFO L83 FinitePrefix]: Finished finitePrefix Result has 327227 conditions, 142517 events. 112365/142517 cut-off events. For 82857/82857 co-relation queries the response was YES. Maximal size of possible extension queue 3723. Compared 808238 event pairs, 78939 based on Foata normal form. 36/102564 useless extension candidates. Maximal degree in co-relation 327201. Up to 136668 conditions per place. [2023-08-04 09:56:09,592 INFO L140 encePairwiseOnDemand]: 521/525 looper letters, 118 selfloop transitions, 3 changer transitions 11/140 dead transitions. [2023-08-04 09:56:09,592 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 140 transitions, 652 flow [2023-08-04 09:56:09,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 09:56:09,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 09:56:09,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1048 transitions. [2023-08-04 09:56:09,594 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4990476190476191 [2023-08-04 09:56:09,594 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1048 transitions. [2023-08-04 09:56:09,594 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1048 transitions. [2023-08-04 09:56:09,595 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 09:56:09,595 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1048 transitions. [2023-08-04 09:56:09,596 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 262.0) internal successors, (1048), 4 states have internal predecessors, (1048), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:56:09,598 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 525.0) internal successors, (2625), 5 states have internal predecessors, (2625), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:56:09,598 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 525.0) internal successors, (2625), 5 states have internal predecessors, (2625), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:56:09,598 INFO L175 Difference]: Start difference. First operand has 79 places, 72 transitions, 244 flow. Second operand 4 states and 1048 transitions. [2023-08-04 09:56:09,598 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 140 transitions, 652 flow [2023-08-04 09:56:10,393 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 81 places, 140 transitions, 648 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-08-04 09:56:10,394 INFO L231 Difference]: Finished difference. Result has 83 places, 68 transitions, 242 flow [2023-08-04 09:56:10,394 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=525, PETRI_DIFFERENCE_MINUEND_FLOW=240, PETRI_DIFFERENCE_MINUEND_PLACES=78, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=72, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=69, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=242, PETRI_PLACES=83, PETRI_TRANSITIONS=68} [2023-08-04 09:56:10,395 INFO L281 CegarLoopForPetriNet]: 65 programPoint places, 18 predicate places. [2023-08-04 09:56:10,395 INFO L495 AbstractCegarLoop]: Abstraction has has 83 places, 68 transitions, 242 flow [2023-08-04 09:56:10,395 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 235.8) internal successors, (1179), 5 states have internal predecessors, (1179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:56:10,395 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 09:56:10,395 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 09:56:10,400 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2023-08-04 09:56:10,595 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2023-08-04 09:56:10,597 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 09:56:10,597 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 09:56:10,597 INFO L85 PathProgramCache]: Analyzing trace with hash 1576296832, now seen corresponding path program 1 times [2023-08-04 09:56:10,597 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 09:56:10,597 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [350145917] [2023-08-04 09:56:10,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:56:10,597 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 09:56:10,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:56:10,816 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2023-08-04 09:56:10,816 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 09:56:10,816 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [350145917] [2023-08-04 09:56:10,816 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [350145917] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 09:56:10,816 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 09:56:10,816 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-04 09:56:10,816 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1096200264] [2023-08-04 09:56:10,816 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 09:56:10,817 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 09:56:10,817 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 09:56:10,817 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 09:56:10,817 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-04 09:56:10,840 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 225 out of 525 [2023-08-04 09:56:10,840 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 83 places, 68 transitions, 242 flow. Second operand has 3 states, 3 states have (on average 234.0) internal successors, (702), 3 states have internal predecessors, (702), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:56:10,840 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 09:56:10,840 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 225 of 525 [2023-08-04 09:56:10,840 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 09:56:16,658 INFO L124 PetriNetUnfolderBase]: 85180/108192 cut-off events. [2023-08-04 09:56:16,658 INFO L125 PetriNetUnfolderBase]: For 66004/66004 co-relation queries the response was YES. [2023-08-04 09:56:16,991 INFO L83 FinitePrefix]: Finished finitePrefix Result has 248934 conditions, 108192 events. 85180/108192 cut-off events. For 66004/66004 co-relation queries the response was YES. Maximal size of possible extension queue 2848. Compared 613768 event pairs, 12196 based on Foata normal form. 1/86019 useless extension candidates. Maximal degree in co-relation 248906. Up to 99224 conditions per place. [2023-08-04 09:56:17,279 INFO L140 encePairwiseOnDemand]: 519/525 looper letters, 96 selfloop transitions, 5 changer transitions 1/110 dead transitions. [2023-08-04 09:56:17,279 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 110 transitions, 620 flow [2023-08-04 09:56:17,279 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 09:56:17,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 09:56:17,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 769 transitions. [2023-08-04 09:56:17,281 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4882539682539683 [2023-08-04 09:56:17,281 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 769 transitions. [2023-08-04 09:56:17,281 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 769 transitions. [2023-08-04 09:56:17,281 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 09:56:17,281 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 769 transitions. [2023-08-04 09:56:17,282 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 256.3333333333333) internal successors, (769), 3 states have internal predecessors, (769), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:56:17,283 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 525.0) internal successors, (2100), 4 states have internal predecessors, (2100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:56:17,283 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 525.0) internal successors, (2100), 4 states have internal predecessors, (2100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:56:17,283 INFO L175 Difference]: Start difference. First operand has 83 places, 68 transitions, 242 flow. Second operand 3 states and 769 transitions. [2023-08-04 09:56:17,283 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 110 transitions, 620 flow [2023-08-04 09:56:17,546 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 110 transitions, 604 flow, removed 2 selfloop flow, removed 3 redundant places. [2023-08-04 09:56:17,547 INFO L231 Difference]: Finished difference. Result has 80 places, 72 transitions, 267 flow [2023-08-04 09:56:17,547 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=525, PETRI_DIFFERENCE_MINUEND_FLOW=234, PETRI_DIFFERENCE_MINUEND_PLACES=77, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=68, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=267, PETRI_PLACES=80, PETRI_TRANSITIONS=72} [2023-08-04 09:56:17,547 INFO L281 CegarLoopForPetriNet]: 65 programPoint places, 15 predicate places. [2023-08-04 09:56:17,547 INFO L495 AbstractCegarLoop]: Abstraction has has 80 places, 72 transitions, 267 flow [2023-08-04 09:56:17,548 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 234.0) internal successors, (702), 3 states have internal predecessors, (702), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:56:17,548 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 09:56:17,548 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 09:56:17,548 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2023-08-04 09:56:17,548 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 09:56:17,548 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 09:56:17,548 INFO L85 PathProgramCache]: Analyzing trace with hash 1982393052, now seen corresponding path program 1 times [2023-08-04 09:56:17,548 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 09:56:17,548 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [681370526] [2023-08-04 09:56:17,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:56:17,548 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 09:56:17,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:56:17,631 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-08-04 09:56:17,631 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 09:56:17,631 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [681370526] [2023-08-04 09:56:17,631 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [681370526] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 09:56:17,631 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 09:56:17,631 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-04 09:56:17,631 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [203057025] [2023-08-04 09:56:17,631 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 09:56:17,632 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-04 09:56:17,632 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 09:56:17,632 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-04 09:56:17,632 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-04 09:56:17,653 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 226 out of 525 [2023-08-04 09:56:17,653 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 80 places, 72 transitions, 267 flow. Second operand has 4 states, 4 states have (on average 234.0) internal successors, (936), 4 states have internal predecessors, (936), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:56:17,653 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 09:56:17,654 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 226 of 525 [2023-08-04 09:56:17,654 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 09:56:28,059 INFO L124 PetriNetUnfolderBase]: 138922/181634 cut-off events. [2023-08-04 09:56:28,059 INFO L125 PetriNetUnfolderBase]: For 98274/98274 co-relation queries the response was YES. [2023-08-04 09:56:28,675 INFO L83 FinitePrefix]: Finished finitePrefix Result has 439752 conditions, 181634 events. 138922/181634 cut-off events. For 98274/98274 co-relation queries the response was YES. Maximal size of possible extension queue 4553. Compared 1149777 event pairs, 65146 based on Foata normal form. 0/153136 useless extension candidates. Maximal degree in co-relation 439723. Up to 95374 conditions per place. [2023-08-04 09:56:29,405 INFO L140 encePairwiseOnDemand]: 519/525 looper letters, 163 selfloop transitions, 4 changer transitions 3/177 dead transitions. [2023-08-04 09:56:29,405 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 83 places, 177 transitions, 1010 flow [2023-08-04 09:56:29,406 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 09:56:29,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 09:56:29,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1055 transitions. [2023-08-04 09:56:29,407 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5023809523809524 [2023-08-04 09:56:29,407 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1055 transitions. [2023-08-04 09:56:29,407 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1055 transitions. [2023-08-04 09:56:29,408 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 09:56:29,408 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1055 transitions. [2023-08-04 09:56:29,409 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 263.75) internal successors, (1055), 4 states have internal predecessors, (1055), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:56:29,411 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 525.0) internal successors, (2625), 5 states have internal predecessors, (2625), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:56:29,411 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 525.0) internal successors, (2625), 5 states have internal predecessors, (2625), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:56:29,411 INFO L175 Difference]: Start difference. First operand has 80 places, 72 transitions, 267 flow. Second operand 4 states and 1055 transitions. [2023-08-04 09:56:29,411 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 83 places, 177 transitions, 1010 flow [2023-08-04 09:56:30,867 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 82 places, 177 transitions, 999 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 09:56:30,869 INFO L231 Difference]: Finished difference. Result has 84 places, 74 transitions, 291 flow [2023-08-04 09:56:30,869 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=525, PETRI_DIFFERENCE_MINUEND_FLOW=262, PETRI_DIFFERENCE_MINUEND_PLACES=79, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=72, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=291, PETRI_PLACES=84, PETRI_TRANSITIONS=74} [2023-08-04 09:56:30,869 INFO L281 CegarLoopForPetriNet]: 65 programPoint places, 19 predicate places. [2023-08-04 09:56:30,869 INFO L495 AbstractCegarLoop]: Abstraction has has 84 places, 74 transitions, 291 flow [2023-08-04 09:56:30,869 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 234.0) internal successors, (936), 4 states have internal predecessors, (936), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:56:30,869 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 09:56:30,869 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 09:56:30,869 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2023-08-04 09:56:30,870 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 09:56:30,870 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 09:56:30,870 INFO L85 PathProgramCache]: Analyzing trace with hash 1060664956, now seen corresponding path program 1 times [2023-08-04 09:56:30,870 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 09:56:30,870 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [675152178] [2023-08-04 09:56:30,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:56:30,870 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 09:56:30,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:56:30,928 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-08-04 09:56:30,929 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 09:56:30,929 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [675152178] [2023-08-04 09:56:30,929 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [675152178] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 09:56:30,929 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 09:56:30,929 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-04 09:56:30,929 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1243671349] [2023-08-04 09:56:30,929 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 09:56:30,929 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-04 09:56:30,929 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 09:56:30,929 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-04 09:56:30,930 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-04 09:56:30,955 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 224 out of 525 [2023-08-04 09:56:30,956 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 84 places, 74 transitions, 291 flow. Second operand has 4 states, 4 states have (on average 232.0) internal successors, (928), 4 states have internal predecessors, (928), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:56:30,956 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 09:56:30,956 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 224 of 525 [2023-08-04 09:56:30,956 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 09:56:44,233 INFO L124 PetriNetUnfolderBase]: 165480/217817 cut-off events. [2023-08-04 09:56:44,233 INFO L125 PetriNetUnfolderBase]: For 185304/190663 co-relation queries the response was YES. [2023-08-04 09:56:45,308 INFO L83 FinitePrefix]: Finished finitePrefix Result has 585214 conditions, 217817 events. 165480/217817 cut-off events. For 185304/190663 co-relation queries the response was YES. Maximal size of possible extension queue 4948. Compared 1425926 event pairs, 88652 based on Foata normal form. 8800/226212 useless extension candidates. Maximal degree in co-relation 585183. Up to 150066 conditions per place. [2023-08-04 09:56:46,098 INFO L140 encePairwiseOnDemand]: 519/525 looper letters, 148 selfloop transitions, 4 changer transitions 0/159 dead transitions. [2023-08-04 09:56:46,098 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 87 places, 159 transitions, 946 flow [2023-08-04 09:56:46,098 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 09:56:46,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 09:56:46,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1025 transitions. [2023-08-04 09:56:46,100 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4880952380952381 [2023-08-04 09:56:46,100 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1025 transitions. [2023-08-04 09:56:46,100 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1025 transitions. [2023-08-04 09:56:46,101 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 09:56:46,101 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1025 transitions. [2023-08-04 09:56:46,120 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 256.25) internal successors, (1025), 4 states have internal predecessors, (1025), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:56:46,122 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 525.0) internal successors, (2625), 5 states have internal predecessors, (2625), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:56:46,122 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 525.0) internal successors, (2625), 5 states have internal predecessors, (2625), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:56:46,122 INFO L175 Difference]: Start difference. First operand has 84 places, 74 transitions, 291 flow. Second operand 4 states and 1025 transitions. [2023-08-04 09:56:46,122 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 87 places, 159 transitions, 946 flow [2023-08-04 09:56:48,153 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 86 places, 159 transitions, 939 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 09:56:48,155 INFO L231 Difference]: Finished difference. Result has 88 places, 76 transitions, 317 flow [2023-08-04 09:56:48,155 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=525, PETRI_DIFFERENCE_MINUEND_FLOW=288, PETRI_DIFFERENCE_MINUEND_PLACES=83, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=74, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=70, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=317, PETRI_PLACES=88, PETRI_TRANSITIONS=76} [2023-08-04 09:56:48,156 INFO L281 CegarLoopForPetriNet]: 65 programPoint places, 23 predicate places. [2023-08-04 09:56:48,156 INFO L495 AbstractCegarLoop]: Abstraction has has 88 places, 76 transitions, 317 flow [2023-08-04 09:56:48,156 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 232.0) internal successors, (928), 4 states have internal predecessors, (928), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:56:48,156 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 09:56:48,156 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 09:56:48,156 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2023-08-04 09:56:48,156 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 09:56:48,156 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 09:56:48,156 INFO L85 PathProgramCache]: Analyzing trace with hash 510706503, now seen corresponding path program 1 times [2023-08-04 09:56:48,156 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 09:56:48,157 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1900118853] [2023-08-04 09:56:48,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:56:48,157 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 09:56:48,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:56:48,340 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-08-04 09:56:48,340 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 09:56:48,340 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1900118853] [2023-08-04 09:56:48,340 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1900118853] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 09:56:48,340 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 09:56:48,340 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-04 09:56:48,340 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1793890434] [2023-08-04 09:56:48,340 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 09:56:48,340 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-04 09:56:48,340 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 09:56:48,341 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-04 09:56:48,341 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-08-04 09:56:48,386 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 226 out of 525 [2023-08-04 09:56:48,386 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 88 places, 76 transitions, 317 flow. Second operand has 4 states, 4 states have (on average 234.0) internal successors, (936), 4 states have internal predecessors, (936), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:56:48,386 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 09:56:48,386 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 226 of 525 [2023-08-04 09:56:48,386 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 09:57:08,533 INFO L124 PetriNetUnfolderBase]: 227800/301283 cut-off events. [2023-08-04 09:57:08,533 INFO L125 PetriNetUnfolderBase]: For 329274/341653 co-relation queries the response was YES. [2023-08-04 09:57:09,845 INFO L83 FinitePrefix]: Finished finitePrefix Result has 866959 conditions, 301283 events. 227800/301283 cut-off events. For 329274/341653 co-relation queries the response was YES. Maximal size of possible extension queue 6875. Compared 2059218 event pairs, 73940 based on Foata normal form. 20063/321346 useless extension candidates. Maximal degree in co-relation 866926. Up to 196098 conditions per place. [2023-08-04 09:57:10,787 INFO L140 encePairwiseOnDemand]: 518/525 looper letters, 142 selfloop transitions, 7 changer transitions 10/166 dead transitions. [2023-08-04 09:57:10,787 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 91 places, 166 transitions, 1043 flow [2023-08-04 09:57:10,788 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 09:57:10,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 09:57:10,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1037 transitions. [2023-08-04 09:57:10,789 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4938095238095238 [2023-08-04 09:57:10,789 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1037 transitions. [2023-08-04 09:57:10,789 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1037 transitions. [2023-08-04 09:57:10,790 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 09:57:10,790 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1037 transitions. [2023-08-04 09:57:10,791 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 259.25) internal successors, (1037), 4 states have internal predecessors, (1037), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:57:10,792 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 525.0) internal successors, (2625), 5 states have internal predecessors, (2625), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:57:10,793 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 525.0) internal successors, (2625), 5 states have internal predecessors, (2625), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:57:10,793 INFO L175 Difference]: Start difference. First operand has 88 places, 76 transitions, 317 flow. Second operand 4 states and 1037 transitions. [2023-08-04 09:57:10,793 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 91 places, 166 transitions, 1043 flow [2023-08-04 09:57:12,751 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 90 places, 166 transitions, 1038 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 09:57:12,752 INFO L231 Difference]: Finished difference. Result has 93 places, 83 transitions, 388 flow [2023-08-04 09:57:12,752 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=525, PETRI_DIFFERENCE_MINUEND_FLOW=314, PETRI_DIFFERENCE_MINUEND_PLACES=87, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=76, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=69, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=388, PETRI_PLACES=93, PETRI_TRANSITIONS=83} [2023-08-04 09:57:12,752 INFO L281 CegarLoopForPetriNet]: 65 programPoint places, 28 predicate places. [2023-08-04 09:57:12,752 INFO L495 AbstractCegarLoop]: Abstraction has has 93 places, 83 transitions, 388 flow [2023-08-04 09:57:12,753 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 234.0) internal successors, (936), 4 states have internal predecessors, (936), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:57:12,753 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 09:57:12,753 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 09:57:12,753 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2023-08-04 09:57:12,753 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 09:57:12,753 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 09:57:12,753 INFO L85 PathProgramCache]: Analyzing trace with hash -1283063377, now seen corresponding path program 1 times [2023-08-04 09:57:12,753 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 09:57:12,753 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1165012787] [2023-08-04 09:57:12,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:57:12,753 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 09:57:12,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:57:12,855 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2023-08-04 09:57:12,855 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 09:57:12,855 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1165012787] [2023-08-04 09:57:12,855 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1165012787] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 09:57:12,855 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 09:57:12,855 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-04 09:57:12,855 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1287607102] [2023-08-04 09:57:12,855 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 09:57:12,855 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-04 09:57:12,856 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 09:57:12,856 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-04 09:57:12,856 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-04 09:57:12,891 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 224 out of 525 [2023-08-04 09:57:12,891 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 93 places, 83 transitions, 388 flow. Second operand has 4 states, 4 states have (on average 232.0) internal successors, (928), 4 states have internal predecessors, (928), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:57:12,891 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 09:57:12,891 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 224 of 525 [2023-08-04 09:57:12,891 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 09:57:38,922 INFO L124 PetriNetUnfolderBase]: 279340/373634 cut-off events. [2023-08-04 09:57:38,922 INFO L125 PetriNetUnfolderBase]: For 609123/635117 co-relation queries the response was YES. [2023-08-04 09:57:40,617 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1160592 conditions, 373634 events. 279340/373634 cut-off events. For 609123/635117 co-relation queries the response was YES. Maximal size of possible extension queue 7389. Compared 2616809 event pairs, 148550 based on Foata normal form. 30229/403371 useless extension candidates. Maximal degree in co-relation 1160557. Up to 249143 conditions per place. [2023-08-04 09:57:41,958 INFO L140 encePairwiseOnDemand]: 519/525 looper letters, 163 selfloop transitions, 3 changer transitions 0/174 dead transitions. [2023-08-04 09:57:41,958 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 96 places, 174 transitions, 1163 flow [2023-08-04 09:57:41,958 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 09:57:41,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 09:57:41,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1022 transitions. [2023-08-04 09:57:41,960 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4866666666666667 [2023-08-04 09:57:41,960 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1022 transitions. [2023-08-04 09:57:41,960 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1022 transitions. [2023-08-04 09:57:41,960 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 09:57:41,960 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1022 transitions. [2023-08-04 09:57:41,961 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 255.5) internal successors, (1022), 4 states have internal predecessors, (1022), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:57:41,963 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 525.0) internal successors, (2625), 5 states have internal predecessors, (2625), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:57:41,963 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 525.0) internal successors, (2625), 5 states have internal predecessors, (2625), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:57:41,963 INFO L175 Difference]: Start difference. First operand has 93 places, 83 transitions, 388 flow. Second operand 4 states and 1022 transitions. [2023-08-04 09:57:41,963 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 96 places, 174 transitions, 1163 flow [2023-08-04 09:57:46,222 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 96 places, 174 transitions, 1163 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-04 09:57:46,223 INFO L231 Difference]: Finished difference. Result has 98 places, 85 transitions, 418 flow [2023-08-04 09:57:46,224 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=525, PETRI_DIFFERENCE_MINUEND_FLOW=388, PETRI_DIFFERENCE_MINUEND_PLACES=93, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=83, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=80, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=418, PETRI_PLACES=98, PETRI_TRANSITIONS=85} [2023-08-04 09:57:46,224 INFO L281 CegarLoopForPetriNet]: 65 programPoint places, 33 predicate places. [2023-08-04 09:57:46,224 INFO L495 AbstractCegarLoop]: Abstraction has has 98 places, 85 transitions, 418 flow [2023-08-04 09:57:46,224 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 232.0) internal successors, (928), 4 states have internal predecessors, (928), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:57:46,224 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 09:57:46,224 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 09:57:46,224 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2023-08-04 09:57:46,225 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 09:57:46,225 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 09:57:46,225 INFO L85 PathProgramCache]: Analyzing trace with hash -1122823887, now seen corresponding path program 2 times [2023-08-04 09:57:46,225 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 09:57:46,225 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1862673446] [2023-08-04 09:57:46,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:57:46,225 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 09:57:46,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:57:46,285 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2023-08-04 09:57:46,285 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 09:57:46,285 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1862673446] [2023-08-04 09:57:46,285 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1862673446] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 09:57:46,285 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 09:57:46,285 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-04 09:57:46,285 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [344422571] [2023-08-04 09:57:46,285 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 09:57:46,286 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-04 09:57:46,286 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 09:57:46,286 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-04 09:57:46,286 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-08-04 09:57:46,304 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 226 out of 525 [2023-08-04 09:57:46,305 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 98 places, 85 transitions, 418 flow. Second operand has 4 states, 4 states have (on average 234.0) internal successors, (936), 4 states have internal predecessors, (936), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:57:46,305 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 09:57:46,305 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 226 of 525 [2023-08-04 09:57:46,305 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 09:58:35,286 INFO L124 PetriNetUnfolderBase]: 467176/631145 cut-off events. [2023-08-04 09:58:35,286 INFO L125 PetriNetUnfolderBase]: For 1258361/1291776 co-relation queries the response was YES. [2023-08-04 09:58:38,753 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2079920 conditions, 631145 events. 467176/631145 cut-off events. For 1258361/1291776 co-relation queries the response was YES. Maximal size of possible extension queue 12595. Compared 4741506 event pairs, 257131 based on Foata normal form. 43568/674563 useless extension candidates. Maximal degree in co-relation 2079882. Up to 314881 conditions per place. [2023-08-04 09:58:41,051 INFO L140 encePairwiseOnDemand]: 518/525 looper letters, 180 selfloop transitions, 14 changer transitions 5/206 dead transitions. [2023-08-04 09:58:41,052 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 101 places, 206 transitions, 1394 flow [2023-08-04 09:58:41,052 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 09:58:41,052 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 09:58:41,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1055 transitions. [2023-08-04 09:58:41,053 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5023809523809524 [2023-08-04 09:58:41,054 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1055 transitions. [2023-08-04 09:58:41,054 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1055 transitions. [2023-08-04 09:58:41,054 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 09:58:41,054 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1055 transitions. [2023-08-04 09:58:41,055 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 263.75) internal successors, (1055), 4 states have internal predecessors, (1055), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:58:41,057 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 525.0) internal successors, (2625), 5 states have internal predecessors, (2625), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:58:41,057 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 525.0) internal successors, (2625), 5 states have internal predecessors, (2625), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:58:41,057 INFO L175 Difference]: Start difference. First operand has 98 places, 85 transitions, 418 flow. Second operand 4 states and 1055 transitions. [2023-08-04 09:58:41,057 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 101 places, 206 transitions, 1394 flow [2023-08-04 09:59:27,093 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 100 places, 206 transitions, 1390 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 09:59:27,095 INFO L231 Difference]: Finished difference. Result has 102 places, 93 transitions, 554 flow [2023-08-04 09:59:27,095 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=525, PETRI_DIFFERENCE_MINUEND_FLOW=416, PETRI_DIFFERENCE_MINUEND_PLACES=97, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=85, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=71, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=554, PETRI_PLACES=102, PETRI_TRANSITIONS=93} [2023-08-04 09:59:27,095 INFO L281 CegarLoopForPetriNet]: 65 programPoint places, 37 predicate places. [2023-08-04 09:59:27,095 INFO L495 AbstractCegarLoop]: Abstraction has has 102 places, 93 transitions, 554 flow [2023-08-04 09:59:27,095 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 234.0) internal successors, (936), 4 states have internal predecessors, (936), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:59:27,095 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 09:59:27,096 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 09:59:27,096 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2023-08-04 09:59:27,096 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 09:59:27,096 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 09:59:27,096 INFO L85 PathProgramCache]: Analyzing trace with hash 532536924, now seen corresponding path program 2 times [2023-08-04 09:59:27,096 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 09:59:27,096 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [199253017] [2023-08-04 09:59:27,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:59:27,096 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 09:59:27,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:59:27,175 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-08-04 09:59:27,175 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 09:59:27,175 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [199253017] [2023-08-04 09:59:27,176 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [199253017] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 09:59:27,176 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 09:59:27,176 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-04 09:59:27,176 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1401324418] [2023-08-04 09:59:27,176 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 09:59:27,176 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-04 09:59:27,176 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 09:59:27,176 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-04 09:59:27,176 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-08-04 09:59:27,199 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 226 out of 525 [2023-08-04 09:59:27,200 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 102 places, 93 transitions, 554 flow. Second operand has 4 states, 4 states have (on average 234.25) internal successors, (937), 4 states have internal predecessors, (937), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:59:27,200 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 09:59:27,200 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 226 of 525 [2023-08-04 09:59:27,200 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 10:00:39,741 INFO L124 PetriNetUnfolderBase]: 627032/842032 cut-off events. [2023-08-04 10:00:39,742 INFO L125 PetriNetUnfolderBase]: For 2468381/2512793 co-relation queries the response was YES. [2023-08-04 10:00:45,669 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2999996 conditions, 842032 events. 627032/842032 cut-off events. For 2468381/2512793 co-relation queries the response was YES. Maximal size of possible extension queue 16070. Compared 6433381 event pairs, 287948 based on Foata normal form. 58616/900604 useless extension candidates. Maximal degree in co-relation 2999956. Up to 639573 conditions per place. [2023-08-04 10:00:49,775 INFO L140 encePairwiseOnDemand]: 518/525 looper letters, 153 selfloop transitions, 10 changer transitions 15/186 dead transitions. [2023-08-04 10:00:49,776 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 105 places, 186 transitions, 1418 flow [2023-08-04 10:00:49,776 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 10:00:49,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 10:00:49,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1037 transitions. [2023-08-04 10:00:49,778 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4938095238095238 [2023-08-04 10:00:49,778 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1037 transitions. [2023-08-04 10:00:49,778 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1037 transitions. [2023-08-04 10:00:49,778 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 10:00:49,778 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1037 transitions. [2023-08-04 10:00:49,805 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 259.25) internal successors, (1037), 4 states have internal predecessors, (1037), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 10:00:49,807 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 525.0) internal successors, (2625), 5 states have internal predecessors, (2625), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 10:00:49,807 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 525.0) internal successors, (2625), 5 states have internal predecessors, (2625), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 10:00:49,807 INFO L175 Difference]: Start difference. First operand has 102 places, 93 transitions, 554 flow. Second operand 4 states and 1037 transitions. [2023-08-04 10:00:49,807 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 105 places, 186 transitions, 1418 flow [2023-08-04 10:02:06,348 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 104 places, 186 transitions, 1408 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 10:02:06,350 INFO L231 Difference]: Finished difference. Result has 106 places, 96 transitions, 605 flow [2023-08-04 10:02:06,350 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=525, PETRI_DIFFERENCE_MINUEND_FLOW=548, PETRI_DIFFERENCE_MINUEND_PLACES=101, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=93, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=83, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=605, PETRI_PLACES=106, PETRI_TRANSITIONS=96} [2023-08-04 10:02:06,351 INFO L281 CegarLoopForPetriNet]: 65 programPoint places, 41 predicate places. [2023-08-04 10:02:06,351 INFO L495 AbstractCegarLoop]: Abstraction has has 106 places, 96 transitions, 605 flow [2023-08-04 10:02:06,351 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 234.25) internal successors, (937), 4 states have internal predecessors, (937), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 10:02:06,351 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 10:02:06,351 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 10:02:06,351 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2023-08-04 10:02:06,351 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 10:02:06,353 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 10:02:06,353 INFO L85 PathProgramCache]: Analyzing trace with hash -283268411, now seen corresponding path program 1 times [2023-08-04 10:02:06,353 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 10:02:06,353 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1168711436] [2023-08-04 10:02:06,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 10:02:06,353 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 10:02:06,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 10:02:06,485 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-08-04 10:02:06,485 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 10:02:06,485 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1168711436] [2023-08-04 10:02:06,485 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1168711436] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 10:02:06,485 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 10:02:06,485 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-04 10:02:06,485 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1061763649] [2023-08-04 10:02:06,485 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 10:02:06,486 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-04 10:02:06,486 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 10:02:06,486 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-04 10:02:06,486 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-04 10:02:06,523 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 226 out of 525 [2023-08-04 10:02:06,524 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 106 places, 96 transitions, 605 flow. Second operand has 4 states, 4 states have (on average 234.25) internal successors, (937), 4 states have internal predecessors, (937), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 10:02:06,524 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 10:02:06,524 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 226 of 525 [2023-08-04 10:02:06,524 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand