/usr/bin/java -Xmx16000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s /storage/repos/CAV22/benchmarks/svcomp-Reach-32bit-Automizer_Default.epf --traceabstraction.order.of.the.error.locations.to.be.checked PROGRAM_FIRST -tc /storage/repos/CAV22/benchmarks/AutomizerCInline.xml -i /storage/repos/CAV22/benchmarks/increased_bounds/weaver_chl-match-symm.wvr_bound2.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-19404b3-m [2023-08-04 08:23:30,357 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-08-04 08:23:30,420 INFO L114 SettingsManager]: Loading settings from /storage/repos/CAV22/benchmarks/svcomp-Reach-32bit-Automizer_Default.epf [2023-08-04 08:23:30,423 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-08-04 08:23:30,424 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-08-04 08:23:30,424 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Translation Mode: [2023-08-04 08:23:30,424 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Checked method. Library mode if empty. [2023-08-04 08:23:30,454 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-04 08:23:30,455 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-04 08:23:30,458 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-04 08:23:30,459 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-04 08:23:30,459 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-04 08:23:30,460 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-04 08:23:30,461 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-08-04 08:23:30,461 INFO L153 SettingsManager]: * Use SBE=true [2023-08-04 08:23:30,461 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-04 08:23:30,462 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-04 08:23:30,462 INFO L153 SettingsManager]: * sizeof long=4 [2023-08-04 08:23:30,462 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-04 08:23:30,462 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-08-04 08:23:30,462 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-08-04 08:23:30,463 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-04 08:23:30,463 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-04 08:23:30,463 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-04 08:23:30,464 INFO L153 SettingsManager]: * sizeof long double=12 [2023-08-04 08:23:30,465 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-08-04 08:23:30,465 INFO L153 SettingsManager]: * Use constant arrays=true [2023-08-04 08:23:30,465 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-04 08:23:30,465 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-04 08:23:30,466 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-04 08:23:30,466 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-04 08:23:30,467 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-04 08:23:30,467 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-04 08:23:30,467 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-04 08:23:30,467 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-04 08:23:30,467 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-04 08:23:30,467 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-04 08:23:30,468 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-08-04 08:23:30,468 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-04 08:23:30,468 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-04 08:23:30,468 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-04 08:23:30,468 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Order of the error locations to be checked -> PROGRAM_FIRST [2023-08-04 08:23:30,701 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-04 08:23:30,724 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-04 08:23:30,726 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-04 08:23:30,727 INFO L270 PluginConnector]: Initializing CDTParser... [2023-08-04 08:23:30,728 INFO L274 PluginConnector]: CDTParser initialized [2023-08-04 08:23:30,728 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/CAV22/benchmarks/increased_bounds/weaver_chl-match-symm.wvr_bound2.c [2023-08-04 08:23:31,947 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-08-04 08:23:32,135 INFO L384 CDTParser]: Found 1 translation units. [2023-08-04 08:23:32,136 INFO L180 CDTParser]: Scanning /storage/repos/CAV22/benchmarks/increased_bounds/weaver_chl-match-symm.wvr_bound2.c [2023-08-04 08:23:32,143 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/aa0dd74e2/76e6194d7b5a4b2580298bac8ed39b34/FLAG5aac08fe0 [2023-08-04 08:23:32,159 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/aa0dd74e2/76e6194d7b5a4b2580298bac8ed39b34 [2023-08-04 08:23:32,164 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-04 08:23:32,165 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-08-04 08:23:32,168 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-04 08:23:32,168 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-04 08:23:32,171 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-04 08:23:32,171 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.08 08:23:32" (1/1) ... [2023-08-04 08:23:32,172 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@556546ce and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 08:23:32, skipping insertion in model container [2023-08-04 08:23:32,172 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.08 08:23:32" (1/1) ... [2023-08-04 08:23:32,196 INFO L176 MainTranslator]: Built tables and reachable declarations [2023-08-04 08:23:32,382 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/CAV22/benchmarks/increased_bounds/weaver_chl-match-symm.wvr_bound2.c[2746,2759] [2023-08-04 08:23:32,390 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-04 08:23:32,400 INFO L201 MainTranslator]: Completed pre-run [2023-08-04 08:23:32,436 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/CAV22/benchmarks/increased_bounds/weaver_chl-match-symm.wvr_bound2.c[2746,2759] [2023-08-04 08:23:32,438 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-04 08:23:32,450 INFO L206 MainTranslator]: Completed translation [2023-08-04 08:23:32,450 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 08:23:32 WrapperNode [2023-08-04 08:23:32,450 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-04 08:23:32,451 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-04 08:23:32,451 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-04 08:23:32,451 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-04 08:23:32,457 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 08:23:32" (1/1) ... [2023-08-04 08:23:32,474 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 08:23:32" (1/1) ... [2023-08-04 08:23:32,508 INFO L138 Inliner]: procedures = 22, calls = 27, calls flagged for inlining = 11, calls inlined = 17, statements flattened = 186 [2023-08-04 08:23:32,508 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-04 08:23:32,509 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-04 08:23:32,509 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-04 08:23:32,509 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-08-04 08:23:32,517 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 08:23:32" (1/1) ... [2023-08-04 08:23:32,517 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 08:23:32" (1/1) ... [2023-08-04 08:23:32,520 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 08:23:32" (1/1) ... [2023-08-04 08:23:32,520 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 08:23:32" (1/1) ... [2023-08-04 08:23:32,525 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 08:23:32" (1/1) ... [2023-08-04 08:23:32,529 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 08:23:32" (1/1) ... [2023-08-04 08:23:32,530 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 08:23:32" (1/1) ... [2023-08-04 08:23:32,531 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 08:23:32" (1/1) ... [2023-08-04 08:23:32,534 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-04 08:23:32,534 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-04 08:23:32,535 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-08-04 08:23:32,535 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-08-04 08:23:32,535 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 08:23:32" (1/1) ... [2023-08-04 08:23:32,543 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-04 08:23:32,554 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 08:23:32,565 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-08-04 08:23:32,586 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-08-04 08:23:32,606 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-04 08:23:32,606 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-08-04 08:23:32,606 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-08-04 08:23:32,606 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-08-04 08:23:32,606 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-08-04 08:23:32,606 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-04 08:23:32,606 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-04 08:23:32,606 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-04 08:23:32,607 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-04 08:23:32,607 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-04 08:23:32,607 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-04 08:23:32,607 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-04 08:23:32,608 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-08-04 08:23:32,688 INFO L236 CfgBuilder]: Building ICFG [2023-08-04 08:23:32,689 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-04 08:23:33,093 INFO L277 CfgBuilder]: Performing block encoding [2023-08-04 08:23:33,100 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-04 08:23:33,100 INFO L302 CfgBuilder]: Removed 4 assume(true) statements. [2023-08-04 08:23:33,102 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.08 08:23:33 BoogieIcfgContainer [2023-08-04 08:23:33,103 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-04 08:23:33,105 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-04 08:23:33,105 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-08-04 08:23:33,108 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-08-04 08:23:33,108 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 04.08 08:23:32" (1/3) ... [2023-08-04 08:23:33,109 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@624779ff and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.08 08:23:33, skipping insertion in model container [2023-08-04 08:23:33,109 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 08:23:32" (2/3) ... [2023-08-04 08:23:33,109 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@624779ff and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.08 08:23:33, skipping insertion in model container [2023-08-04 08:23:33,109 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.08 08:23:33" (3/3) ... [2023-08-04 08:23:33,110 INFO L112 eAbstractionObserver]: Analyzing ICFG weaver_chl-match-symm.wvr_bound2.c [2023-08-04 08:23:33,118 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-08-04 08:23:33,136 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-04 08:23:33,137 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-08-04 08:23:33,138 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-04 08:23:33,260 INFO L144 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2023-08-04 08:23:33,293 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 201 places, 215 transitions, 452 flow [2023-08-04 08:23:33,470 INFO L124 PetriNetUnfolderBase]: 46/428 cut-off events. [2023-08-04 08:23:33,470 INFO L125 PetriNetUnfolderBase]: For 8/16 co-relation queries the response was YES. [2023-08-04 08:23:33,481 INFO L83 FinitePrefix]: Finished finitePrefix Result has 448 conditions, 428 events. 46/428 cut-off events. For 8/16 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 1603 event pairs, 0 based on Foata normal form. 0/370 useless extension candidates. Maximal degree in co-relation 216. Up to 8 conditions per place. [2023-08-04 08:23:33,482 INFO L82 GeneralOperation]: Start removeDead. Operand has 201 places, 215 transitions, 452 flow [2023-08-04 08:23:33,493 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 201 places, 215 transitions, 452 flow [2023-08-04 08:23:33,497 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-04 08:23:33,508 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 201 places, 215 transitions, 452 flow [2023-08-04 08:23:33,512 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 201 places, 215 transitions, 452 flow [2023-08-04 08:23:33,512 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 201 places, 215 transitions, 452 flow [2023-08-04 08:23:33,570 INFO L124 PetriNetUnfolderBase]: 46/428 cut-off events. [2023-08-04 08:23:33,571 INFO L125 PetriNetUnfolderBase]: For 8/16 co-relation queries the response was YES. [2023-08-04 08:23:33,574 INFO L83 FinitePrefix]: Finished finitePrefix Result has 448 conditions, 428 events. 46/428 cut-off events. For 8/16 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 1603 event pairs, 0 based on Foata normal form. 0/370 useless extension candidates. Maximal degree in co-relation 216. Up to 8 conditions per place. [2023-08-04 08:23:33,586 INFO L119 LiptonReduction]: Number of co-enabled transitions 17014 [2023-08-04 08:23:39,216 INFO L134 LiptonReduction]: Checked pairs total: 16783 [2023-08-04 08:23:39,217 INFO L136 LiptonReduction]: Total number of compositions: 234 [2023-08-04 08:23:39,229 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-04 08:23:39,235 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;@27a6b8b0, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-04 08:23:39,235 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-04 08:23:39,244 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-04 08:23:39,244 INFO L124 PetriNetUnfolderBase]: 1/20 cut-off events. [2023-08-04 08:23:39,244 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 08:23:39,245 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 08:23:39,245 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-08-04 08:23:39,246 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 08:23:39,250 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 08:23:39,251 INFO L85 PathProgramCache]: Analyzing trace with hash -130577394, now seen corresponding path program 1 times [2023-08-04 08:23:39,258 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 08:23:39,258 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [848897851] [2023-08-04 08:23:39,259 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:23:39,259 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 08:23:39,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:23:39,484 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-04 08:23:39,484 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 08:23:39,485 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [848897851] [2023-08-04 08:23:39,485 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [848897851] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 08:23:39,485 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 08:23:39,485 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-04 08:23:39,486 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1638281503] [2023-08-04 08:23:39,487 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 08:23:39,494 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 08:23:39,499 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 08:23:39,519 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 08:23:39,520 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-04 08:23:39,543 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 189 out of 449 [2023-08-04 08:23:39,548 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 30 places, 30 transitions, 82 flow. Second operand has 3 states, 3 states have (on average 190.66666666666666) internal successors, (572), 3 states have internal predecessors, (572), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:23:39,548 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 08:23:39,548 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 189 of 449 [2023-08-04 08:23:39,549 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 08:23:39,635 INFO L124 PetriNetUnfolderBase]: 69/191 cut-off events. [2023-08-04 08:23:39,635 INFO L125 PetriNetUnfolderBase]: For 12/12 co-relation queries the response was YES. [2023-08-04 08:23:39,636 INFO L83 FinitePrefix]: Finished finitePrefix Result has 385 conditions, 191 events. 69/191 cut-off events. For 12/12 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 737 event pairs, 27 based on Foata normal form. 9/174 useless extension candidates. Maximal degree in co-relation 270. Up to 163 conditions per place. [2023-08-04 08:23:39,637 INFO L140 encePairwiseOnDemand]: 444/449 looper letters, 22 selfloop transitions, 2 changer transitions 3/30 dead transitions. [2023-08-04 08:23:39,637 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 31 places, 30 transitions, 132 flow [2023-08-04 08:23:39,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 08:23:39,641 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 08:23:39,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 595 transitions. [2023-08-04 08:23:39,659 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4417223459539718 [2023-08-04 08:23:39,660 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 595 transitions. [2023-08-04 08:23:39,661 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 595 transitions. [2023-08-04 08:23:39,664 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 08:23:39,666 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 595 transitions. [2023-08-04 08:23:39,671 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 198.33333333333334) internal successors, (595), 3 states have internal predecessors, (595), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:23:39,678 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 449.0) internal successors, (1796), 4 states have internal predecessors, (1796), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:23:39,679 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 449.0) internal successors, (1796), 4 states have internal predecessors, (1796), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:23:39,681 INFO L175 Difference]: Start difference. First operand has 30 places, 30 transitions, 82 flow. Second operand 3 states and 595 transitions. [2023-08-04 08:23:39,682 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 31 places, 30 transitions, 132 flow [2023-08-04 08:23:39,686 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 31 places, 30 transitions, 132 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-04 08:23:39,687 INFO L231 Difference]: Finished difference. Result has 32 places, 26 transitions, 78 flow [2023-08-04 08:23:39,689 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=449, PETRI_DIFFERENCE_MINUEND_FLOW=78, PETRI_DIFFERENCE_MINUEND_PLACES=29, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=28, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=78, PETRI_PLACES=32, PETRI_TRANSITIONS=26} [2023-08-04 08:23:39,692 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 2 predicate places. [2023-08-04 08:23:39,693 INFO L495 AbstractCegarLoop]: Abstraction has has 32 places, 26 transitions, 78 flow [2023-08-04 08:23:39,694 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 190.66666666666666) internal successors, (572), 3 states have internal predecessors, (572), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:23:39,694 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 08:23:39,694 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 08:23:39,694 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-04 08:23:39,695 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 08:23:39,695 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 08:23:39,695 INFO L85 PathProgramCache]: Analyzing trace with hash -1757493209, now seen corresponding path program 1 times [2023-08-04 08:23:39,695 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 08:23:39,696 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1502105183] [2023-08-04 08:23:39,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:23:39,696 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 08:23:39,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:23:39,815 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-04 08:23:39,815 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 08:23:39,815 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1502105183] [2023-08-04 08:23:39,815 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1502105183] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 08:23:39,816 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1670651712] [2023-08-04 08:23:39,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:23:39,816 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 08:23:39,816 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 08:23:39,827 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 08:23:39,829 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-08-04 08:23:39,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:23:39,887 INFO L262 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 08:23:39,890 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 08:23:39,916 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-04 08:23:39,917 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 08:23:39,917 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1670651712] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 08:23:39,917 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 08:23:39,917 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2023-08-04 08:23:39,918 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1069180895] [2023-08-04 08:23:39,918 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 08:23:39,919 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 08:23:39,919 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 08:23:39,919 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 08:23:39,919 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 08:23:39,929 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 189 out of 449 [2023-08-04 08:23:39,930 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 32 places, 26 transitions, 78 flow. Second operand has 3 states, 3 states have (on average 192.33333333333334) internal successors, (577), 3 states have internal predecessors, (577), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:23:39,930 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 08:23:39,930 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 189 of 449 [2023-08-04 08:23:39,930 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 08:23:39,987 INFO L124 PetriNetUnfolderBase]: 67/183 cut-off events. [2023-08-04 08:23:39,987 INFO L125 PetriNetUnfolderBase]: For 14/14 co-relation queries the response was YES. [2023-08-04 08:23:39,987 INFO L83 FinitePrefix]: Finished finitePrefix Result has 378 conditions, 183 events. 67/183 cut-off events. For 14/14 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 595 event pairs, 30 based on Foata normal form. 0/161 useless extension candidates. Maximal degree in co-relation 353. Up to 153 conditions per place. [2023-08-04 08:23:39,988 INFO L140 encePairwiseOnDemand]: 446/449 looper letters, 23 selfloop transitions, 2 changer transitions 1/29 dead transitions. [2023-08-04 08:23:39,988 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 32 places, 29 transitions, 136 flow [2023-08-04 08:23:39,989 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 08:23:39,989 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 08:23:39,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 594 transitions. [2023-08-04 08:23:39,991 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44097995545657015 [2023-08-04 08:23:39,991 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 594 transitions. [2023-08-04 08:23:39,991 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 594 transitions. [2023-08-04 08:23:39,991 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 08:23:39,991 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 594 transitions. [2023-08-04 08:23:39,993 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 198.0) internal successors, (594), 3 states have internal predecessors, (594), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:23:39,995 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 449.0) internal successors, (1796), 4 states have internal predecessors, (1796), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:23:39,996 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 449.0) internal successors, (1796), 4 states have internal predecessors, (1796), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:23:39,996 INFO L175 Difference]: Start difference. First operand has 32 places, 26 transitions, 78 flow. Second operand 3 states and 594 transitions. [2023-08-04 08:23:39,996 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 32 places, 29 transitions, 136 flow [2023-08-04 08:23:39,997 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 28 places, 29 transitions, 126 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-08-04 08:23:39,998 INFO L231 Difference]: Finished difference. Result has 29 places, 26 transitions, 76 flow [2023-08-04 08:23:39,998 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=449, PETRI_DIFFERENCE_MINUEND_FLOW=68, PETRI_DIFFERENCE_MINUEND_PLACES=26, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=26, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=76, PETRI_PLACES=29, PETRI_TRANSITIONS=26} [2023-08-04 08:23:39,999 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, -1 predicate places. [2023-08-04 08:23:39,999 INFO L495 AbstractCegarLoop]: Abstraction has has 29 places, 26 transitions, 76 flow [2023-08-04 08:23:39,999 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 192.33333333333334) internal successors, (577), 3 states have internal predecessors, (577), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:23:40,000 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 08:23:40,000 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 08:23:40,010 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 08:23:40,207 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 08:23:40,208 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 08:23:40,208 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 08:23:40,209 INFO L85 PathProgramCache]: Analyzing trace with hash 1548904607, now seen corresponding path program 1 times [2023-08-04 08:23:40,209 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 08:23:40,209 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1073835836] [2023-08-04 08:23:40,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:23:40,209 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 08:23:40,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:23:40,310 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-04 08:23:40,310 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 08:23:40,311 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1073835836] [2023-08-04 08:23:40,311 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1073835836] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 08:23:40,311 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1976991058] [2023-08-04 08:23:40,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:23:40,311 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 08:23:40,311 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 08:23:40,317 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 08:23:40,342 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-08-04 08:23:40,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:23:40,390 INFO L262 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 08:23:40,392 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 08:23:40,403 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-04 08:23:40,403 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 08:23:40,404 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1976991058] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 08:23:40,404 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 08:23:40,404 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2023-08-04 08:23:40,404 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [635459910] [2023-08-04 08:23:40,404 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 08:23:40,405 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 08:23:40,405 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 08:23:40,405 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 08:23:40,406 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 08:23:40,431 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 189 out of 449 [2023-08-04 08:23:40,432 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 29 places, 26 transitions, 76 flow. Second operand has 3 states, 3 states have (on average 193.33333333333334) internal successors, (580), 3 states have internal predecessors, (580), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:23:40,432 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 08:23:40,432 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 189 of 449 [2023-08-04 08:23:40,432 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 08:23:40,505 INFO L124 PetriNetUnfolderBase]: 41/125 cut-off events. [2023-08-04 08:23:40,506 INFO L125 PetriNetUnfolderBase]: For 9/9 co-relation queries the response was YES. [2023-08-04 08:23:40,506 INFO L83 FinitePrefix]: Finished finitePrefix Result has 275 conditions, 125 events. 41/125 cut-off events. For 9/9 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 323 event pairs, 28 based on Foata normal form. 0/115 useless extension candidates. Maximal degree in co-relation 141. Up to 93 conditions per place. [2023-08-04 08:23:40,507 INFO L140 encePairwiseOnDemand]: 446/449 looper letters, 27 selfloop transitions, 2 changer transitions 0/32 dead transitions. [2023-08-04 08:23:40,507 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 31 places, 32 transitions, 150 flow [2023-08-04 08:23:40,507 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 08:23:40,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 08:23:40,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 597 transitions. [2023-08-04 08:23:40,509 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44320712694877507 [2023-08-04 08:23:40,509 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 597 transitions. [2023-08-04 08:23:40,509 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 597 transitions. [2023-08-04 08:23:40,510 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 08:23:40,510 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 597 transitions. [2023-08-04 08:23:40,511 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 199.0) internal successors, (597), 3 states have internal predecessors, (597), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:23:40,513 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 449.0) internal successors, (1796), 4 states have internal predecessors, (1796), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:23:40,514 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 449.0) internal successors, (1796), 4 states have internal predecessors, (1796), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:23:40,514 INFO L175 Difference]: Start difference. First operand has 29 places, 26 transitions, 76 flow. Second operand 3 states and 597 transitions. [2023-08-04 08:23:40,514 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 31 places, 32 transitions, 150 flow [2023-08-04 08:23:40,516 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 29 places, 32 transitions, 146 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-04 08:23:40,516 INFO L231 Difference]: Finished difference. Result has 30 places, 27 transitions, 84 flow [2023-08-04 08:23:40,517 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=449, PETRI_DIFFERENCE_MINUEND_FLOW=72, PETRI_DIFFERENCE_MINUEND_PLACES=27, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=26, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=84, PETRI_PLACES=30, PETRI_TRANSITIONS=27} [2023-08-04 08:23:40,518 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 0 predicate places. [2023-08-04 08:23:40,518 INFO L495 AbstractCegarLoop]: Abstraction has has 30 places, 27 transitions, 84 flow [2023-08-04 08:23:40,518 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 193.33333333333334) internal successors, (580), 3 states have internal predecessors, (580), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:23:40,518 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 08:23:40,519 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 08:23:40,538 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-08-04 08:23:40,724 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2023-08-04 08:23:40,724 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 08:23:40,725 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 08:23:40,725 INFO L85 PathProgramCache]: Analyzing trace with hash 224362433, now seen corresponding path program 1 times [2023-08-04 08:23:40,725 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 08:23:40,725 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2071433012] [2023-08-04 08:23:40,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:23:40,725 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 08:23:40,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:23:40,823 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-04 08:23:40,824 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 08:23:40,824 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2071433012] [2023-08-04 08:23:40,824 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2071433012] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 08:23:40,824 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1571967389] [2023-08-04 08:23:40,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:23:40,825 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 08:23:40,825 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 08:23:40,826 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 08:23:40,828 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-08-04 08:23:40,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:23:40,892 INFO L262 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 08:23:40,893 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 08:23:40,901 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-04 08:23:40,901 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 08:23:40,902 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1571967389] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 08:23:40,902 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 08:23:40,902 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2023-08-04 08:23:40,902 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [99636663] [2023-08-04 08:23:40,902 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 08:23:40,903 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 08:23:40,903 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 08:23:40,903 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 08:23:40,904 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 08:23:40,914 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 189 out of 449 [2023-08-04 08:23:40,915 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 30 places, 27 transitions, 84 flow. Second operand has 3 states, 3 states have (on average 194.66666666666666) internal successors, (584), 3 states have internal predecessors, (584), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:23:40,915 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 08:23:40,915 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 189 of 449 [2023-08-04 08:23:40,915 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 08:23:40,982 INFO L124 PetriNetUnfolderBase]: 34/104 cut-off events. [2023-08-04 08:23:40,982 INFO L125 PetriNetUnfolderBase]: For 12/12 co-relation queries the response was YES. [2023-08-04 08:23:40,982 INFO L83 FinitePrefix]: Finished finitePrefix Result has 250 conditions, 104 events. 34/104 cut-off events. For 12/12 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 218 event pairs, 29 based on Foata normal form. 0/103 useless extension candidates. Maximal degree in co-relation 127. Up to 82 conditions per place. [2023-08-04 08:23:40,983 INFO L140 encePairwiseOnDemand]: 446/449 looper letters, 23 selfloop transitions, 2 changer transitions 2/30 dead transitions. [2023-08-04 08:23:40,983 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 32 places, 30 transitions, 144 flow [2023-08-04 08:23:40,984 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 08:23:40,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 08:23:40,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 594 transitions. [2023-08-04 08:23:40,987 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44097995545657015 [2023-08-04 08:23:40,989 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 594 transitions. [2023-08-04 08:23:40,989 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 594 transitions. [2023-08-04 08:23:40,994 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 08:23:40,994 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 594 transitions. [2023-08-04 08:23:40,996 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 198.0) internal successors, (594), 3 states have internal predecessors, (594), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:23:40,998 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 449.0) internal successors, (1796), 4 states have internal predecessors, (1796), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:23:40,999 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 449.0) internal successors, (1796), 4 states have internal predecessors, (1796), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:23:40,999 INFO L175 Difference]: Start difference. First operand has 30 places, 27 transitions, 84 flow. Second operand 3 states and 594 transitions. [2023-08-04 08:23:40,999 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 32 places, 30 transitions, 144 flow [2023-08-04 08:23:41,002 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 31 places, 30 transitions, 142 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 08:23:41,003 INFO L231 Difference]: Finished difference. Result has 32 places, 26 transitions, 86 flow [2023-08-04 08:23:41,003 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=449, PETRI_DIFFERENCE_MINUEND_FLOW=82, PETRI_DIFFERENCE_MINUEND_PLACES=29, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=27, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=86, PETRI_PLACES=32, PETRI_TRANSITIONS=26} [2023-08-04 08:23:41,004 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 2 predicate places. [2023-08-04 08:23:41,004 INFO L495 AbstractCegarLoop]: Abstraction has has 32 places, 26 transitions, 86 flow [2023-08-04 08:23:41,005 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 194.66666666666666) internal successors, (584), 3 states have internal predecessors, (584), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:23:41,005 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 08:23:41,005 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 08:23:41,013 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 08:23:41,210 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 08:23:41,211 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 08:23:41,211 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 08:23:41,211 INFO L85 PathProgramCache]: Analyzing trace with hash -595486395, now seen corresponding path program 1 times [2023-08-04 08:23:41,212 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 08:23:41,212 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1334982239] [2023-08-04 08:23:41,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:23:41,212 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 08:23:41,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:23:41,323 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-04 08:23:41,324 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 08:23:41,324 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1334982239] [2023-08-04 08:23:41,324 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1334982239] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 08:23:41,324 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [540087799] [2023-08-04 08:23:41,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:23:41,325 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 08:23:41,325 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 08:23:41,326 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 08:23:41,328 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-08-04 08:23:41,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:23:41,404 INFO L262 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-04 08:23:41,406 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 08:23:41,442 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-04 08:23:41,442 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 08:23:41,465 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-04 08:23:41,465 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [540087799] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 08:23:41,466 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 08:23:41,466 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 4 [2023-08-04 08:23:41,466 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1554107950] [2023-08-04 08:23:41,466 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 08:23:41,466 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 08:23:41,467 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 08:23:41,467 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 08:23:41,467 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-04 08:23:41,485 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 188 out of 449 [2023-08-04 08:23:41,486 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 32 places, 26 transitions, 86 flow. Second operand has 5 states, 5 states have (on average 193.0) internal successors, (965), 5 states have internal predecessors, (965), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:23:41,486 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 08:23:41,486 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 188 of 449 [2023-08-04 08:23:41,487 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 08:23:41,497 INFO L124 PetriNetUnfolderBase]: 2/10 cut-off events. [2023-08-04 08:23:41,497 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 08:23:41,498 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32 conditions, 10 events. 2/10 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 8 event pairs, 0 based on Foata normal form. 2/12 useless extension candidates. Maximal degree in co-relation 23. Up to 6 conditions per place. [2023-08-04 08:23:41,498 INFO L140 encePairwiseOnDemand]: 446/449 looper letters, 0 selfloop transitions, 0 changer transitions 7/7 dead transitions. [2023-08-04 08:23:41,498 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 16 places, 7 transitions, 32 flow [2023-08-04 08:23:41,498 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 08:23:41,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 08:23:41,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 760 transitions. [2023-08-04 08:23:41,501 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42316258351893093 [2023-08-04 08:23:41,501 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 760 transitions. [2023-08-04 08:23:41,501 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 760 transitions. [2023-08-04 08:23:41,502 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 08:23:41,502 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 760 transitions. [2023-08-04 08:23:41,504 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 190.0) internal successors, (760), 4 states have internal predecessors, (760), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:23:41,507 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 449.0) internal successors, (2245), 5 states have internal predecessors, (2245), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:23:41,508 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 449.0) internal successors, (2245), 5 states have internal predecessors, (2245), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:23:41,508 INFO L175 Difference]: Start difference. First operand has 32 places, 26 transitions, 86 flow. Second operand 4 states and 760 transitions. [2023-08-04 08:23:41,508 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 16 places, 7 transitions, 32 flow [2023-08-04 08:23:41,508 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 15 places, 7 transitions, 30 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 08:23:41,508 INFO L231 Difference]: Finished difference. Result has 15 places, 0 transitions, 0 flow [2023-08-04 08:23:41,509 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=449, PETRI_DIFFERENCE_MINUEND_FLOW=12, PETRI_DIFFERENCE_MINUEND_PLACES=12, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=5, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=5, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=0, PETRI_PLACES=15, PETRI_TRANSITIONS=0} [2023-08-04 08:23:41,509 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, -15 predicate places. [2023-08-04 08:23:41,509 INFO L495 AbstractCegarLoop]: Abstraction has has 15 places, 0 transitions, 0 flow [2023-08-04 08:23:41,510 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 193.0) internal successors, (965), 5 states have internal predecessors, (965), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:23:41,512 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2023-08-04 08:23:41,523 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-08-04 08:23:41,719 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 08:23:41,719 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1] [2023-08-04 08:23:41,721 INFO L307 ceAbstractionStarter]: Result for error location AllErrorsAtOnce was SAFE (1/2) [2023-08-04 08:23:41,725 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 201 places, 215 transitions, 452 flow [2023-08-04 08:23:41,774 INFO L124 PetriNetUnfolderBase]: 46/428 cut-off events. [2023-08-04 08:23:41,775 INFO L125 PetriNetUnfolderBase]: For 8/16 co-relation queries the response was YES. [2023-08-04 08:23:41,778 INFO L83 FinitePrefix]: Finished finitePrefix Result has 448 conditions, 428 events. 46/428 cut-off events. For 8/16 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 1603 event pairs, 0 based on Foata normal form. 0/370 useless extension candidates. Maximal degree in co-relation 216. Up to 8 conditions per place. [2023-08-04 08:23:41,779 INFO L82 GeneralOperation]: Start removeDead. Operand has 201 places, 215 transitions, 452 flow [2023-08-04 08:23:41,782 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 201 places, 215 transitions, 452 flow [2023-08-04 08:23:41,782 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-04 08:23:41,782 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 201 places, 215 transitions, 452 flow [2023-08-04 08:23:41,783 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 201 places, 215 transitions, 452 flow [2023-08-04 08:23:41,783 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 201 places, 215 transitions, 452 flow [2023-08-04 08:23:41,843 INFO L124 PetriNetUnfolderBase]: 46/428 cut-off events. [2023-08-04 08:23:41,844 INFO L125 PetriNetUnfolderBase]: For 8/16 co-relation queries the response was YES. [2023-08-04 08:23:41,847 INFO L83 FinitePrefix]: Finished finitePrefix Result has 448 conditions, 428 events. 46/428 cut-off events. For 8/16 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 1603 event pairs, 0 based on Foata normal form. 0/370 useless extension candidates. Maximal degree in co-relation 216. Up to 8 conditions per place. [2023-08-04 08:23:41,858 INFO L119 LiptonReduction]: Number of co-enabled transitions 17014 [2023-08-04 08:23:47,028 INFO L134 LiptonReduction]: Checked pairs total: 17147 [2023-08-04 08:23:47,029 INFO L136 LiptonReduction]: Total number of compositions: 239 [2023-08-04 08:23:47,030 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-04 08:23:47,031 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;@27a6b8b0, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-04 08:23:47,031 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2023-08-04 08:23:47,034 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-04 08:23:47,034 INFO L124 PetriNetUnfolderBase]: 1/26 cut-off events. [2023-08-04 08:23:47,034 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 08:23:47,034 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 08:23:47,034 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2023-08-04 08:23:47,034 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-04 08:23:47,035 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 08:23:47,035 INFO L85 PathProgramCache]: Analyzing trace with hash -1643450788, now seen corresponding path program 1 times [2023-08-04 08:23:47,035 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 08:23:47,035 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1998434406] [2023-08-04 08:23:47,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:23:47,035 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 08:23:47,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-04 08:23:47,048 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-04 08:23:47,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-04 08:23:47,067 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-04 08:23:47,067 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-04 08:23:47,067 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2023-08-04 08:23:47,067 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 2 remaining) [2023-08-04 08:23:47,068 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-08-04 08:23:47,068 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-04 08:23:47,068 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE,UNKNOWN (2/2) [2023-08-04 08:23:47,069 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-04 08:23:47,069 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-08-04 08:23:47,098 INFO L144 ThreadInstanceAdder]: Constructed 8 joinOtherThreadTransitions. [2023-08-04 08:23:47,101 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 293 places, 315 transitions, 678 flow [2023-08-04 08:23:47,284 INFO L124 PetriNetUnfolderBase]: 181/1332 cut-off events. [2023-08-04 08:23:47,284 INFO L125 PetriNetUnfolderBase]: For 72/128 co-relation queries the response was YES. [2023-08-04 08:23:47,308 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1429 conditions, 1332 events. 181/1332 cut-off events. For 72/128 co-relation queries the response was YES. Maximal size of possible extension queue 30. Compared 7587 event pairs, 1 based on Foata normal form. 0/1130 useless extension candidates. Maximal degree in co-relation 783. Up to 32 conditions per place. [2023-08-04 08:23:47,309 INFO L82 GeneralOperation]: Start removeDead. Operand has 293 places, 315 transitions, 678 flow [2023-08-04 08:23:47,316 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 293 places, 315 transitions, 678 flow [2023-08-04 08:23:47,317 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-04 08:23:47,317 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 293 places, 315 transitions, 678 flow [2023-08-04 08:23:47,317 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 293 places, 315 transitions, 678 flow [2023-08-04 08:23:47,317 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 293 places, 315 transitions, 678 flow [2023-08-04 08:23:47,512 INFO L124 PetriNetUnfolderBase]: 181/1332 cut-off events. [2023-08-04 08:23:47,512 INFO L125 PetriNetUnfolderBase]: For 72/128 co-relation queries the response was YES. [2023-08-04 08:23:47,541 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1429 conditions, 1332 events. 181/1332 cut-off events. For 72/128 co-relation queries the response was YES. Maximal size of possible extension queue 30. Compared 7587 event pairs, 1 based on Foata normal form. 0/1130 useless extension candidates. Maximal degree in co-relation 783. Up to 32 conditions per place. [2023-08-04 08:23:47,600 INFO L119 LiptonReduction]: Number of co-enabled transitions 53580 [2023-08-04 08:23:54,232 INFO L134 LiptonReduction]: Checked pairs total: 55976 [2023-08-04 08:23:54,232 INFO L136 LiptonReduction]: Total number of compositions: 355 [2023-08-04 08:23:54,234 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-04 08:23:54,234 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;@27a6b8b0, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-04 08:23:54,234 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-04 08:23:54,236 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-04 08:23:54,236 INFO L124 PetriNetUnfolderBase]: 1/19 cut-off events. [2023-08-04 08:23:54,237 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 08:23:54,237 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 08:23:54,237 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-08-04 08:23:54,237 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 08:23:54,237 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 08:23:54,237 INFO L85 PathProgramCache]: Analyzing trace with hash -536469029, now seen corresponding path program 1 times [2023-08-04 08:23:54,237 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 08:23:54,237 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1982598513] [2023-08-04 08:23:54,238 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:23:54,238 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 08:23:54,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:23:54,267 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-04 08:23:54,268 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 08:23:54,268 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1982598513] [2023-08-04 08:23:54,268 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1982598513] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 08:23:54,268 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 08:23:54,268 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-04 08:23:54,268 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [403089919] [2023-08-04 08:23:54,269 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 08:23:54,269 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 08:23:54,269 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 08:23:54,269 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 08:23:54,269 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-04 08:23:54,278 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 275 out of 670 [2023-08-04 08:23:54,279 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 40 places, 40 transitions, 128 flow. Second operand has 3 states, 3 states have (on average 276.6666666666667) internal successors, (830), 3 states have internal predecessors, (830), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:23:54,279 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 08:23:54,279 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 275 of 670 [2023-08-04 08:23:54,279 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 08:23:54,598 INFO L124 PetriNetUnfolderBase]: 1269/2322 cut-off events. [2023-08-04 08:23:54,598 INFO L125 PetriNetUnfolderBase]: For 362/362 co-relation queries the response was YES. [2023-08-04 08:23:54,601 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4734 conditions, 2322 events. 1269/2322 cut-off events. For 362/362 co-relation queries the response was YES. Maximal size of possible extension queue 90. Compared 12499 event pairs, 803 based on Foata normal form. 81/2193 useless extension candidates. Maximal degree in co-relation 1825. Up to 2103 conditions per place. [2023-08-04 08:23:54,612 INFO L140 encePairwiseOnDemand]: 665/670 looper letters, 32 selfloop transitions, 2 changer transitions 2/41 dead transitions. [2023-08-04 08:23:54,612 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 41 places, 41 transitions, 198 flow [2023-08-04 08:23:54,612 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 08:23:54,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 08:23:54,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 862 transitions. [2023-08-04 08:23:54,617 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42885572139303485 [2023-08-04 08:23:54,617 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 862 transitions. [2023-08-04 08:23:54,617 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 862 transitions. [2023-08-04 08:23:54,618 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 08:23:54,618 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 862 transitions. [2023-08-04 08:23:54,621 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 287.3333333333333) internal successors, (862), 3 states have internal predecessors, (862), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:23:54,627 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 670.0) internal successors, (2680), 4 states have internal predecessors, (2680), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:23:54,627 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 670.0) internal successors, (2680), 4 states have internal predecessors, (2680), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:23:54,628 INFO L175 Difference]: Start difference. First operand has 40 places, 40 transitions, 128 flow. Second operand 3 states and 862 transitions. [2023-08-04 08:23:54,628 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 41 places, 41 transitions, 198 flow [2023-08-04 08:23:54,630 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 41 transitions, 198 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-04 08:23:54,630 INFO L231 Difference]: Finished difference. Result has 42 places, 37 transitions, 124 flow [2023-08-04 08:23:54,631 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=670, PETRI_DIFFERENCE_MINUEND_FLOW=124, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=124, PETRI_PLACES=42, PETRI_TRANSITIONS=37} [2023-08-04 08:23:54,632 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 2 predicate places. [2023-08-04 08:23:54,632 INFO L495 AbstractCegarLoop]: Abstraction has has 42 places, 37 transitions, 124 flow [2023-08-04 08:23:54,632 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 276.6666666666667) internal successors, (830), 3 states have internal predecessors, (830), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:23:54,633 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 08:23:54,633 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 08:23:54,633 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-08-04 08:23:54,633 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 08:23:54,633 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 08:23:54,633 INFO L85 PathProgramCache]: Analyzing trace with hash -198638091, now seen corresponding path program 1 times [2023-08-04 08:23:54,633 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 08:23:54,634 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1882189638] [2023-08-04 08:23:54,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:23:54,634 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 08:23:54,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:23:54,675 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-04 08:23:54,675 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 08:23:54,676 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1882189638] [2023-08-04 08:23:54,676 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1882189638] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 08:23:54,676 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1622800470] [2023-08-04 08:23:54,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:23:54,676 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 08:23:54,676 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 08:23:54,681 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 08:23:54,692 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-08-04 08:23:54,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:23:54,748 INFO L262 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 08:23:54,749 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 08:23:54,761 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-04 08:23:54,761 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 08:23:54,761 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1622800470] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 08:23:54,761 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 08:23:54,761 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2023-08-04 08:23:54,762 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [807472621] [2023-08-04 08:23:54,762 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 08:23:54,762 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 08:23:54,763 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 08:23:54,763 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 08:23:54,763 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 08:23:54,771 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 275 out of 670 [2023-08-04 08:23:54,772 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 37 transitions, 124 flow. Second operand has 3 states, 3 states have (on average 278.3333333333333) internal successors, (835), 3 states have internal predecessors, (835), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:23:54,772 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 08:23:54,772 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 275 of 670 [2023-08-04 08:23:54,772 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 08:23:55,058 INFO L124 PetriNetUnfolderBase]: 1263/2332 cut-off events. [2023-08-04 08:23:55,059 INFO L125 PetriNetUnfolderBase]: For 305/305 co-relation queries the response was YES. [2023-08-04 08:23:55,063 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4727 conditions, 2332 events. 1263/2332 cut-off events. For 305/305 co-relation queries the response was YES. Maximal size of possible extension queue 98. Compared 12756 event pairs, 806 based on Foata normal form. 0/2134 useless extension candidates. Maximal degree in co-relation 4699. Up to 2057 conditions per place. [2023-08-04 08:23:55,074 INFO L140 encePairwiseOnDemand]: 667/670 looper letters, 35 selfloop transitions, 2 changer transitions 0/42 dead transitions. [2023-08-04 08:23:55,074 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 42 places, 42 transitions, 208 flow [2023-08-04 08:23:55,075 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 08:23:55,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 08:23:55,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 862 transitions. [2023-08-04 08:23:55,077 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42885572139303485 [2023-08-04 08:23:55,077 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 862 transitions. [2023-08-04 08:23:55,078 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 862 transitions. [2023-08-04 08:23:55,078 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 08:23:55,080 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 862 transitions. [2023-08-04 08:23:55,082 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 287.3333333333333) internal successors, (862), 3 states have internal predecessors, (862), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:23:55,086 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 670.0) internal successors, (2680), 4 states have internal predecessors, (2680), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:23:55,087 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 670.0) internal successors, (2680), 4 states have internal predecessors, (2680), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:23:55,087 INFO L175 Difference]: Start difference. First operand has 42 places, 37 transitions, 124 flow. Second operand 3 states and 862 transitions. [2023-08-04 08:23:55,087 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 42 places, 42 transitions, 208 flow [2023-08-04 08:23:55,091 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 39 places, 42 transitions, 200 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-08-04 08:23:55,092 INFO L231 Difference]: Finished difference. Result has 40 places, 38 transitions, 128 flow [2023-08-04 08:23:55,092 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=670, PETRI_DIFFERENCE_MINUEND_FLOW=116, PETRI_DIFFERENCE_MINUEND_PLACES=37, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=128, PETRI_PLACES=40, PETRI_TRANSITIONS=38} [2023-08-04 08:23:55,094 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 0 predicate places. [2023-08-04 08:23:55,094 INFO L495 AbstractCegarLoop]: Abstraction has has 40 places, 38 transitions, 128 flow [2023-08-04 08:23:55,094 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 278.3333333333333) internal successors, (835), 3 states have internal predecessors, (835), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:23:55,094 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 08:23:55,095 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 08:23:55,105 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-08-04 08:23:55,305 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 08:23:55,305 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 08:23:55,305 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 08:23:55,305 INFO L85 PathProgramCache]: Analyzing trace with hash 511031043, now seen corresponding path program 1 times [2023-08-04 08:23:55,306 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 08:23:55,306 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1349566633] [2023-08-04 08:23:55,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:23:55,306 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 08:23:55,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:23:55,355 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-04 08:23:55,355 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 08:23:55,357 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1349566633] [2023-08-04 08:23:55,357 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1349566633] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 08:23:55,357 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1681346307] [2023-08-04 08:23:55,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:23:55,358 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 08:23:55,358 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 08:23:55,359 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 08:23:55,361 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-08-04 08:23:55,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:23:55,419 INFO L262 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 08:23:55,420 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 08:23:55,425 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-04 08:23:55,426 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 08:23:55,426 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1681346307] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 08:23:55,426 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 08:23:55,426 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2023-08-04 08:23:55,426 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [810653954] [2023-08-04 08:23:55,426 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 08:23:55,427 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 08:23:55,427 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 08:23:55,427 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 08:23:55,427 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 08:23:55,435 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 275 out of 670 [2023-08-04 08:23:55,436 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 40 places, 38 transitions, 128 flow. Second operand has 3 states, 3 states have (on average 279.3333333333333) internal successors, (838), 3 states have internal predecessors, (838), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:23:55,437 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 08:23:55,437 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 275 of 670 [2023-08-04 08:23:55,437 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 08:23:55,708 INFO L124 PetriNetUnfolderBase]: 1109/2106 cut-off events. [2023-08-04 08:23:55,708 INFO L125 PetriNetUnfolderBase]: For 223/223 co-relation queries the response was YES. [2023-08-04 08:23:55,712 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4370 conditions, 2106 events. 1109/2106 cut-off events. For 223/223 co-relation queries the response was YES. Maximal size of possible extension queue 87. Compared 11486 event pairs, 772 based on Foata normal form. 0/1976 useless extension candidates. Maximal degree in co-relation 1994. Up to 1577 conditions per place. [2023-08-04 08:23:55,719 INFO L140 encePairwiseOnDemand]: 667/670 looper letters, 41 selfloop transitions, 2 changer transitions 0/48 dead transitions. [2023-08-04 08:23:55,720 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 42 places, 48 transitions, 244 flow [2023-08-04 08:23:55,720 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 08:23:55,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 08:23:55,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 867 transitions. [2023-08-04 08:23:55,723 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43134328358208956 [2023-08-04 08:23:55,723 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 867 transitions. [2023-08-04 08:23:55,723 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 867 transitions. [2023-08-04 08:23:55,723 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 08:23:55,723 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 867 transitions. [2023-08-04 08:23:55,725 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 289.0) internal successors, (867), 3 states have internal predecessors, (867), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:23:55,728 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 670.0) internal successors, (2680), 4 states have internal predecessors, (2680), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:23:55,729 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 670.0) internal successors, (2680), 4 states have internal predecessors, (2680), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:23:55,729 INFO L175 Difference]: Start difference. First operand has 40 places, 38 transitions, 128 flow. Second operand 3 states and 867 transitions. [2023-08-04 08:23:55,729 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 42 places, 48 transitions, 244 flow [2023-08-04 08:23:55,730 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 48 transitions, 242 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 08:23:55,731 INFO L231 Difference]: Finished difference. Result has 42 places, 39 transitions, 138 flow [2023-08-04 08:23:55,731 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=670, PETRI_DIFFERENCE_MINUEND_FLOW=126, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=138, PETRI_PLACES=42, PETRI_TRANSITIONS=39} [2023-08-04 08:23:55,731 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 2 predicate places. [2023-08-04 08:23:55,731 INFO L495 AbstractCegarLoop]: Abstraction has has 42 places, 39 transitions, 138 flow [2023-08-04 08:23:55,732 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 279.3333333333333) internal successors, (838), 3 states have internal predecessors, (838), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:23:55,732 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 08:23:55,732 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 08:23:55,737 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-08-04 08:23:55,937 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 08:23:55,937 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 08:23:55,937 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 08:23:55,938 INFO L85 PathProgramCache]: Analyzing trace with hash 1602111721, now seen corresponding path program 1 times [2023-08-04 08:23:55,938 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 08:23:55,938 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [39065706] [2023-08-04 08:23:55,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:23:55,938 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 08:23:55,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:23:55,984 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-04 08:23:55,985 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 08:23:55,985 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [39065706] [2023-08-04 08:23:55,985 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [39065706] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 08:23:55,985 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1733752170] [2023-08-04 08:23:55,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:23:55,985 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 08:23:55,986 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 08:23:55,987 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 08:23:55,989 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-08-04 08:23:56,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:23:56,063 INFO L262 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 08:23:56,064 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 08:23:56,070 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-04 08:23:56,070 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 08:23:56,071 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1733752170] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 08:23:56,071 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 08:23:56,071 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2023-08-04 08:23:56,072 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1189410011] [2023-08-04 08:23:56,073 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 08:23:56,073 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 08:23:56,074 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 08:23:56,074 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 08:23:56,074 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 08:23:56,082 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 275 out of 670 [2023-08-04 08:23:56,083 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 39 transitions, 138 flow. Second operand has 3 states, 3 states have (on average 280.6666666666667) internal successors, (842), 3 states have internal predecessors, (842), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:23:56,083 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 08:23:56,083 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 275 of 670 [2023-08-04 08:23:56,083 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 08:23:56,325 INFO L124 PetriNetUnfolderBase]: 1020/1973 cut-off events. [2023-08-04 08:23:56,325 INFO L125 PetriNetUnfolderBase]: For 450/450 co-relation queries the response was YES. [2023-08-04 08:23:56,329 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4390 conditions, 1973 events. 1020/1973 cut-off events. For 450/450 co-relation queries the response was YES. Maximal size of possible extension queue 69. Compared 10310 event pairs, 731 based on Foata normal form. 0/1940 useless extension candidates. Maximal degree in co-relation 2146. Up to 1403 conditions per place. [2023-08-04 08:23:56,339 INFO L140 encePairwiseOnDemand]: 667/670 looper letters, 42 selfloop transitions, 2 changer transitions 0/49 dead transitions. [2023-08-04 08:23:56,339 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 49 transitions, 256 flow [2023-08-04 08:23:56,339 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 08:23:56,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 08:23:56,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 867 transitions. [2023-08-04 08:23:56,342 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43134328358208956 [2023-08-04 08:23:56,342 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 867 transitions. [2023-08-04 08:23:56,342 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 867 transitions. [2023-08-04 08:23:56,342 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 08:23:56,342 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 867 transitions. [2023-08-04 08:23:56,344 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 289.0) internal successors, (867), 3 states have internal predecessors, (867), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:23:56,347 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 670.0) internal successors, (2680), 4 states have internal predecessors, (2680), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:23:56,347 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 670.0) internal successors, (2680), 4 states have internal predecessors, (2680), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:23:56,347 INFO L175 Difference]: Start difference. First operand has 42 places, 39 transitions, 138 flow. Second operand 3 states and 867 transitions. [2023-08-04 08:23:56,347 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 49 transitions, 256 flow [2023-08-04 08:23:56,349 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 43 places, 49 transitions, 254 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 08:23:56,350 INFO L231 Difference]: Finished difference. Result has 44 places, 40 transitions, 148 flow [2023-08-04 08:23:56,350 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=670, PETRI_DIFFERENCE_MINUEND_FLOW=136, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=148, PETRI_PLACES=44, PETRI_TRANSITIONS=40} [2023-08-04 08:23:56,351 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 4 predicate places. [2023-08-04 08:23:56,351 INFO L495 AbstractCegarLoop]: Abstraction has has 44 places, 40 transitions, 148 flow [2023-08-04 08:23:56,352 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 280.6666666666667) internal successors, (842), 3 states have internal predecessors, (842), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:23:56,352 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 08:23:56,352 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 08:23:56,362 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-08-04 08:23:56,562 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 08:23:56,562 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 08:23:56,562 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 08:23:56,562 INFO L85 PathProgramCache]: Analyzing trace with hash -847966343, now seen corresponding path program 1 times [2023-08-04 08:23:56,563 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 08:23:56,563 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [495131861] [2023-08-04 08:23:56,563 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:23:56,563 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 08:23:56,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:23:56,612 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-04 08:23:56,612 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 08:23:56,612 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [495131861] [2023-08-04 08:23:56,612 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [495131861] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 08:23:56,612 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1904667479] [2023-08-04 08:23:56,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:23:56,613 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 08:23:56,613 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 08:23:56,614 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 08:23:56,616 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-08-04 08:23:56,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:23:56,691 INFO L262 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-04 08:23:56,692 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 08:23:56,704 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-04 08:23:56,704 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 08:23:56,718 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-04 08:23:56,718 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1904667479] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 08:23:56,718 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 08:23:56,718 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 4 [2023-08-04 08:23:56,718 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [514650816] [2023-08-04 08:23:56,718 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 08:23:56,719 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 08:23:56,719 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 08:23:56,719 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 08:23:56,719 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-04 08:23:56,734 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 274 out of 670 [2023-08-04 08:23:56,735 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 40 transitions, 148 flow. Second operand has 5 states, 5 states have (on average 279.0) internal successors, (1395), 5 states have internal predecessors, (1395), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:23:56,735 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 08:23:56,735 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 274 of 670 [2023-08-04 08:23:56,735 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 08:23:56,998 INFO L124 PetriNetUnfolderBase]: 918/1777 cut-off events. [2023-08-04 08:23:56,998 INFO L125 PetriNetUnfolderBase]: For 402/402 co-relation queries the response was YES. [2023-08-04 08:23:57,003 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4054 conditions, 1777 events. 918/1777 cut-off events. For 402/402 co-relation queries the response was YES. Maximal size of possible extension queue 69. Compared 9160 event pairs, 415 based on Foata normal form. 2/1779 useless extension candidates. Maximal degree in co-relation 2162. Up to 1587 conditions per place. [2023-08-04 08:23:57,010 INFO L140 encePairwiseOnDemand]: 666/670 looper letters, 36 selfloop transitions, 3 changer transitions 1/45 dead transitions. [2023-08-04 08:23:57,010 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 45 transitions, 238 flow [2023-08-04 08:23:57,010 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 08:23:57,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 08:23:57,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1134 transitions. [2023-08-04 08:23:57,013 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42313432835820897 [2023-08-04 08:23:57,014 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1134 transitions. [2023-08-04 08:23:57,014 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1134 transitions. [2023-08-04 08:23:57,014 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 08:23:57,014 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1134 transitions. [2023-08-04 08:23:57,016 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 283.5) internal successors, (1134), 4 states have internal predecessors, (1134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:23:57,020 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 670.0) internal successors, (3350), 5 states have internal predecessors, (3350), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:23:57,021 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 670.0) internal successors, (3350), 5 states have internal predecessors, (3350), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:23:57,021 INFO L175 Difference]: Start difference. First operand has 44 places, 40 transitions, 148 flow. Second operand 4 states and 1134 transitions. [2023-08-04 08:23:57,021 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 45 transitions, 238 flow [2023-08-04 08:23:57,025 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 45 transitions, 236 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 08:23:57,026 INFO L231 Difference]: Finished difference. Result has 48 places, 40 transitions, 160 flow [2023-08-04 08:23:57,026 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=670, PETRI_DIFFERENCE_MINUEND_FLOW=146, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=160, PETRI_PLACES=48, PETRI_TRANSITIONS=40} [2023-08-04 08:23:57,027 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 8 predicate places. [2023-08-04 08:23:57,027 INFO L495 AbstractCegarLoop]: Abstraction has has 48 places, 40 transitions, 160 flow [2023-08-04 08:23:57,028 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 279.0) internal successors, (1395), 5 states have internal predecessors, (1395), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:23:57,028 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 08:23:57,028 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 08:23:57,038 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-08-04 08:23:57,238 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2023-08-04 08:23:57,238 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 08:23:57,238 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 08:23:57,239 INFO L85 PathProgramCache]: Analyzing trace with hash -1270342084, now seen corresponding path program 1 times [2023-08-04 08:23:57,239 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 08:23:57,239 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [871811053] [2023-08-04 08:23:57,239 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:23:57,239 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 08:23:57,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:23:57,290 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-08-04 08:23:57,290 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 08:23:57,290 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [871811053] [2023-08-04 08:23:57,290 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [871811053] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 08:23:57,290 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2146232316] [2023-08-04 08:23:57,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:23:57,291 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 08:23:57,291 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 08:23:57,292 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 08:23:57,294 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-08-04 08:23:57,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:23:57,371 INFO L262 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-04 08:23:57,372 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 08:23:57,382 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-08-04 08:23:57,382 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 08:23:57,394 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-08-04 08:23:57,395 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2146232316] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 08:23:57,395 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 08:23:57,395 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 5 [2023-08-04 08:23:57,395 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1550075475] [2023-08-04 08:23:57,395 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 08:23:57,395 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 08:23:57,396 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 08:23:57,396 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 08:23:57,396 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-04 08:23:57,407 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 274 out of 670 [2023-08-04 08:23:57,409 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 48 places, 40 transitions, 160 flow. Second operand has 5 states, 5 states have (on average 279.2) internal successors, (1396), 5 states have internal predecessors, (1396), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:23:57,409 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 08:23:57,409 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 274 of 670 [2023-08-04 08:23:57,409 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 08:23:57,630 INFO L124 PetriNetUnfolderBase]: 866/1681 cut-off events. [2023-08-04 08:23:57,631 INFO L125 PetriNetUnfolderBase]: For 298/298 co-relation queries the response was YES. [2023-08-04 08:23:57,634 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3821 conditions, 1681 events. 866/1681 cut-off events. For 298/298 co-relation queries the response was YES. Maximal size of possible extension queue 74. Compared 8375 event pairs, 392 based on Foata normal form. 8/1689 useless extension candidates. Maximal degree in co-relation 2393. Up to 1367 conditions per place. [2023-08-04 08:23:57,639 INFO L140 encePairwiseOnDemand]: 666/670 looper letters, 40 selfloop transitions, 3 changer transitions 1/49 dead transitions. [2023-08-04 08:23:57,639 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 51 places, 49 transitions, 266 flow [2023-08-04 08:23:57,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 08:23:57,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 08:23:57,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1138 transitions. [2023-08-04 08:23:57,642 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4246268656716418 [2023-08-04 08:23:57,642 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1138 transitions. [2023-08-04 08:23:57,642 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1138 transitions. [2023-08-04 08:23:57,643 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 08:23:57,643 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1138 transitions. [2023-08-04 08:23:57,645 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 284.5) internal successors, (1138), 4 states have internal predecessors, (1138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:23:57,648 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 670.0) internal successors, (3350), 5 states have internal predecessors, (3350), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:23:57,649 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 670.0) internal successors, (3350), 5 states have internal predecessors, (3350), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:23:57,649 INFO L175 Difference]: Start difference. First operand has 48 places, 40 transitions, 160 flow. Second operand 4 states and 1138 transitions. [2023-08-04 08:23:57,649 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 51 places, 49 transitions, 266 flow [2023-08-04 08:23:57,652 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 48 places, 49 transitions, 257 flow, removed 1 selfloop flow, removed 3 redundant places. [2023-08-04 08:23:57,653 INFO L231 Difference]: Finished difference. Result has 50 places, 40 transitions, 165 flow [2023-08-04 08:23:57,653 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=670, PETRI_DIFFERENCE_MINUEND_FLOW=151, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=165, PETRI_PLACES=50, PETRI_TRANSITIONS=40} [2023-08-04 08:23:57,654 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 10 predicate places. [2023-08-04 08:23:57,654 INFO L495 AbstractCegarLoop]: Abstraction has has 50 places, 40 transitions, 165 flow [2023-08-04 08:23:57,655 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 279.2) internal successors, (1396), 5 states have internal predecessors, (1396), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:23:57,655 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 08:23:57,655 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 08:23:57,662 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-08-04 08:23:57,862 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 08:23:57,862 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 08:23:57,863 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 08:23:57,863 INFO L85 PathProgramCache]: Analyzing trace with hash -1227963885, now seen corresponding path program 1 times [2023-08-04 08:23:57,863 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 08:23:57,863 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [64321314] [2023-08-04 08:23:57,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:23:57,863 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 08:23:57,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:23:57,936 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2023-08-04 08:23:57,936 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 08:23:57,936 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [64321314] [2023-08-04 08:23:57,936 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [64321314] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 08:23:57,936 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [687976937] [2023-08-04 08:23:57,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:23:57,936 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 08:23:57,937 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 08:23:57,938 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 08:23:57,968 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-08-04 08:23:58,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:23:58,036 INFO L262 TraceCheckSpWp]: Trace formula consists of 213 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-04 08:23:58,038 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 08:23:58,052 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2023-08-04 08:23:58,053 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 08:23:58,065 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2023-08-04 08:23:58,065 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [687976937] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 08:23:58,065 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 08:23:58,065 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 5 [2023-08-04 08:23:58,065 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2116265486] [2023-08-04 08:23:58,065 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 08:23:58,066 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 08:23:58,066 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 08:23:58,066 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 08:23:58,066 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-04 08:23:58,078 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 274 out of 670 [2023-08-04 08:23:58,079 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 40 transitions, 165 flow. Second operand has 5 states, 5 states have (on average 279.4) internal successors, (1397), 5 states have internal predecessors, (1397), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:23:58,079 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 08:23:58,079 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 274 of 670 [2023-08-04 08:23:58,079 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 08:23:58,317 INFO L124 PetriNetUnfolderBase]: 542/1069 cut-off events. [2023-08-04 08:23:58,317 INFO L125 PetriNetUnfolderBase]: For 403/403 co-relation queries the response was YES. [2023-08-04 08:23:58,319 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2493 conditions, 1069 events. 542/1069 cut-off events. For 403/403 co-relation queries the response was YES. Maximal size of possible extension queue 42. Compared 4510 event pairs, 223 based on Foata normal form. 32/1101 useless extension candidates. Maximal degree in co-relation 1905. Up to 470 conditions per place. [2023-08-04 08:23:58,322 INFO L140 encePairwiseOnDemand]: 666/670 looper letters, 45 selfloop transitions, 4 changer transitions 0/54 dead transitions. [2023-08-04 08:23:58,322 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 54 transitions, 300 flow [2023-08-04 08:23:58,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 08:23:58,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 08:23:58,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1143 transitions. [2023-08-04 08:23:58,326 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42649253731343284 [2023-08-04 08:23:58,326 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1143 transitions. [2023-08-04 08:23:58,326 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1143 transitions. [2023-08-04 08:23:58,326 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 08:23:58,327 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1143 transitions. [2023-08-04 08:23:58,328 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 285.75) internal successors, (1143), 4 states have internal predecessors, (1143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:23:58,332 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 670.0) internal successors, (3350), 5 states have internal predecessors, (3350), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:23:58,332 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 670.0) internal successors, (3350), 5 states have internal predecessors, (3350), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:23:58,332 INFO L175 Difference]: Start difference. First operand has 50 places, 40 transitions, 165 flow. Second operand 4 states and 1143 transitions. [2023-08-04 08:23:58,332 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 54 transitions, 300 flow [2023-08-04 08:23:58,335 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 54 transitions, 290 flow, removed 1 selfloop flow, removed 3 redundant places. [2023-08-04 08:23:58,335 INFO L231 Difference]: Finished difference. Result has 52 places, 41 transitions, 176 flow [2023-08-04 08:23:58,336 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=670, PETRI_DIFFERENCE_MINUEND_FLOW=156, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=176, PETRI_PLACES=52, PETRI_TRANSITIONS=41} [2023-08-04 08:23:58,336 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 12 predicate places. [2023-08-04 08:23:58,336 INFO L495 AbstractCegarLoop]: Abstraction has has 52 places, 41 transitions, 176 flow [2023-08-04 08:23:58,337 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 279.4) internal successors, (1397), 5 states have internal predecessors, (1397), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:23:58,337 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 08:23:58,337 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 08:23:58,345 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-08-04 08:23:58,542 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-08-04 08:23:58,542 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 08:23:58,543 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 08:23:58,543 INFO L85 PathProgramCache]: Analyzing trace with hash 338923344, now seen corresponding path program 1 times [2023-08-04 08:23:58,543 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 08:23:58,543 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1175665399] [2023-08-04 08:23:58,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:23:58,543 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 08:23:58,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:23:58,603 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2023-08-04 08:23:58,604 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 08:23:58,604 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1175665399] [2023-08-04 08:23:58,604 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1175665399] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 08:23:58,604 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1741314666] [2023-08-04 08:23:58,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:23:58,604 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 08:23:58,604 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 08:23:58,605 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 08:23:58,608 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-08-04 08:23:58,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:23:58,697 INFO L262 TraceCheckSpWp]: Trace formula consists of 249 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-04 08:23:58,698 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 08:23:58,708 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2023-08-04 08:23:58,708 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 08:23:58,719 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2023-08-04 08:23:58,719 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1741314666] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 08:23:58,719 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 08:23:58,720 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 5 [2023-08-04 08:23:58,720 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [932643574] [2023-08-04 08:23:58,720 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 08:23:58,720 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 08:23:58,720 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 08:23:58,721 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 08:23:58,721 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-04 08:23:58,731 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 274 out of 670 [2023-08-04 08:23:58,733 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 41 transitions, 176 flow. Second operand has 5 states, 5 states have (on average 279.8) internal successors, (1399), 5 states have internal predecessors, (1399), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:23:58,733 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 08:23:58,733 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 274 of 670 [2023-08-04 08:23:58,733 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 08:23:58,895 INFO L124 PetriNetUnfolderBase]: 530/1026 cut-off events. [2023-08-04 08:23:58,895 INFO L125 PetriNetUnfolderBase]: For 688/688 co-relation queries the response was YES. [2023-08-04 08:23:58,897 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2613 conditions, 1026 events. 530/1026 cut-off events. For 688/688 co-relation queries the response was YES. Maximal size of possible extension queue 42. Compared 4242 event pairs, 439 based on Foata normal form. 9/1035 useless extension candidates. Maximal degree in co-relation 2086. Up to 751 conditions per place. [2023-08-04 08:23:58,900 INFO L140 encePairwiseOnDemand]: 666/670 looper letters, 45 selfloop transitions, 3 changer transitions 2/55 dead transitions. [2023-08-04 08:23:58,900 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 55 transitions, 312 flow [2023-08-04 08:23:58,900 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 08:23:58,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 08:23:58,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1143 transitions. [2023-08-04 08:23:58,903 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42649253731343284 [2023-08-04 08:23:58,903 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1143 transitions. [2023-08-04 08:23:58,903 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1143 transitions. [2023-08-04 08:23:58,904 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 08:23:58,904 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1143 transitions. [2023-08-04 08:23:58,906 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 285.75) internal successors, (1143), 4 states have internal predecessors, (1143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:23:58,909 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 670.0) internal successors, (3350), 5 states have internal predecessors, (3350), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:23:58,909 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 670.0) internal successors, (3350), 5 states have internal predecessors, (3350), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:23:58,909 INFO L175 Difference]: Start difference. First operand has 52 places, 41 transitions, 176 flow. Second operand 4 states and 1143 transitions. [2023-08-04 08:23:58,909 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 55 transitions, 312 flow [2023-08-04 08:23:58,912 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 55 transitions, 308 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-08-04 08:23:58,913 INFO L231 Difference]: Finished difference. Result has 56 places, 40 transitions, 180 flow [2023-08-04 08:23:58,913 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=670, PETRI_DIFFERENCE_MINUEND_FLOW=172, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=180, PETRI_PLACES=56, PETRI_TRANSITIONS=40} [2023-08-04 08:23:58,913 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 16 predicate places. [2023-08-04 08:23:58,913 INFO L495 AbstractCegarLoop]: Abstraction has has 56 places, 40 transitions, 180 flow [2023-08-04 08:23:58,914 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 279.8) internal successors, (1399), 5 states have internal predecessors, (1399), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:23:58,914 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 08:23:58,914 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 08:23:58,923 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 08:23:59,123 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2023-08-04 08:23:59,123 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 08:23:59,123 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 08:23:59,123 INFO L85 PathProgramCache]: Analyzing trace with hash -2047236226, now seen corresponding path program 1 times [2023-08-04 08:23:59,123 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 08:23:59,124 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [400644600] [2023-08-04 08:23:59,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:23:59,124 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 08:23:59,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:24:00,205 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-08-04 08:24:00,205 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 08:24:00,205 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [400644600] [2023-08-04 08:24:00,205 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [400644600] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 08:24:00,205 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [966745700] [2023-08-04 08:24:00,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:24:00,206 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 08:24:00,206 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 08:24:00,207 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 08:24:00,209 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-08-04 08:24:00,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:24:00,323 INFO L262 TraceCheckSpWp]: Trace formula consists of 285 conjuncts, 46 conjunts are in the unsatisfiable core [2023-08-04 08:24:00,325 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 08:24:02,016 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-08-04 08:24:02,017 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 08:24:03,772 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-08-04 08:24:03,772 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [966745700] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 08:24:03,773 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 08:24:03,773 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 11 [2023-08-04 08:24:03,773 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1767152078] [2023-08-04 08:24:03,773 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 08:24:03,773 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-08-04 08:24:03,774 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 08:24:03,774 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-08-04 08:24:03,775 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2023-08-04 08:24:03,949 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 258 out of 670 [2023-08-04 08:24:03,951 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 40 transitions, 180 flow. Second operand has 11 states, 11 states have (on average 262.54545454545456) internal successors, (2888), 11 states have internal predecessors, (2888), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:24:03,951 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 08:24:03,951 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 258 of 670 [2023-08-04 08:24:03,952 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 08:24:04,547 INFO L124 PetriNetUnfolderBase]: 725/1401 cut-off events. [2023-08-04 08:24:04,547 INFO L125 PetriNetUnfolderBase]: For 1073/1073 co-relation queries the response was YES. [2023-08-04 08:24:04,551 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3654 conditions, 1401 events. 725/1401 cut-off events. For 1073/1073 co-relation queries the response was YES. Maximal size of possible extension queue 56. Compared 6950 event pairs, 121 based on Foata normal form. 1/1395 useless extension candidates. Maximal degree in co-relation 3547. Up to 670 conditions per place. [2023-08-04 08:24:04,554 INFO L140 encePairwiseOnDemand]: 662/670 looper letters, 49 selfloop transitions, 5 changer transitions 39/98 dead transitions. [2023-08-04 08:24:04,554 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 98 transitions, 643 flow [2023-08-04 08:24:04,554 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-04 08:24:04,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-04 08:24:04,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1889 transitions. [2023-08-04 08:24:04,559 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.402771855010661 [2023-08-04 08:24:04,559 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1889 transitions. [2023-08-04 08:24:04,559 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1889 transitions. [2023-08-04 08:24:04,560 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 08:24:04,560 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1889 transitions. [2023-08-04 08:24:04,563 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 269.85714285714283) internal successors, (1889), 7 states have internal predecessors, (1889), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:24:04,570 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 670.0) internal successors, (5360), 8 states have internal predecessors, (5360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:24:04,571 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 670.0) internal successors, (5360), 8 states have internal predecessors, (5360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:24:04,571 INFO L175 Difference]: Start difference. First operand has 56 places, 40 transitions, 180 flow. Second operand 7 states and 1889 transitions. [2023-08-04 08:24:04,571 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 98 transitions, 643 flow [2023-08-04 08:24:04,576 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 98 transitions, 622 flow, removed 2 selfloop flow, removed 3 redundant places. [2023-08-04 08:24:04,577 INFO L231 Difference]: Finished difference. Result has 65 places, 44 transitions, 222 flow [2023-08-04 08:24:04,578 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=670, PETRI_DIFFERENCE_MINUEND_FLOW=172, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=222, PETRI_PLACES=65, PETRI_TRANSITIONS=44} [2023-08-04 08:24:04,578 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 25 predicate places. [2023-08-04 08:24:04,578 INFO L495 AbstractCegarLoop]: Abstraction has has 65 places, 44 transitions, 222 flow [2023-08-04 08:24:04,579 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 262.54545454545456) internal successors, (2888), 11 states have internal predecessors, (2888), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:24:04,579 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 08:24:04,579 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 08:24:04,585 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2023-08-04 08:24:04,784 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-08-04 08:24:04,784 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 08:24:04,785 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 08:24:04,785 INFO L85 PathProgramCache]: Analyzing trace with hash -1053052924, now seen corresponding path program 2 times [2023-08-04 08:24:04,785 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 08:24:04,785 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [459605312] [2023-08-04 08:24:04,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:24:04,785 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 08:24:04,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:24:05,627 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-08-04 08:24:05,628 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 08:24:05,628 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [459605312] [2023-08-04 08:24:05,628 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [459605312] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 08:24:05,628 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 08:24:05,628 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-08-04 08:24:05,628 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1995083880] [2023-08-04 08:24:05,628 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 08:24:05,628 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-04 08:24:05,629 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 08:24:05,629 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-04 08:24:05,629 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2023-08-04 08:24:05,709 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 258 out of 670 [2023-08-04 08:24:05,710 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 44 transitions, 222 flow. Second operand has 6 states, 6 states have (on average 262.6666666666667) internal successors, (1576), 6 states have internal predecessors, (1576), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:24:05,710 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 08:24:05,710 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 258 of 670 [2023-08-04 08:24:05,710 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 08:24:06,034 INFO L124 PetriNetUnfolderBase]: 235/564 cut-off events. [2023-08-04 08:24:06,034 INFO L125 PetriNetUnfolderBase]: For 891/891 co-relation queries the response was YES. [2023-08-04 08:24:06,036 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1932 conditions, 564 events. 235/564 cut-off events. For 891/891 co-relation queries the response was YES. Maximal size of possible extension queue 28. Compared 2644 event pairs, 43 based on Foata normal form. 1/560 useless extension candidates. Maximal degree in co-relation 1914. Up to 443 conditions per place. [2023-08-04 08:24:06,037 INFO L140 encePairwiseOnDemand]: 662/670 looper letters, 0 selfloop transitions, 0 changer transitions 60/60 dead transitions. [2023-08-04 08:24:06,037 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 60 transitions, 426 flow [2023-08-04 08:24:06,037 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-04 08:24:06,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-04 08:24:06,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1856 transitions. [2023-08-04 08:24:06,044 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3957356076759062 [2023-08-04 08:24:06,044 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1856 transitions. [2023-08-04 08:24:06,044 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1856 transitions. [2023-08-04 08:24:06,045 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 08:24:06,045 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1856 transitions. [2023-08-04 08:24:06,048 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 265.14285714285717) internal successors, (1856), 7 states have internal predecessors, (1856), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:24:06,053 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 670.0) internal successors, (5360), 8 states have internal predecessors, (5360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:24:06,054 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 670.0) internal successors, (5360), 8 states have internal predecessors, (5360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:24:06,054 INFO L175 Difference]: Start difference. First operand has 65 places, 44 transitions, 222 flow. Second operand 7 states and 1856 transitions. [2023-08-04 08:24:06,054 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 60 transitions, 426 flow [2023-08-04 08:24:06,057 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 60 transitions, 422 flow, removed 2 selfloop flow, removed 2 redundant places. [2023-08-04 08:24:06,057 INFO L231 Difference]: Finished difference. Result has 64 places, 0 transitions, 0 flow [2023-08-04 08:24:06,058 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=670, PETRI_DIFFERENCE_MINUEND_FLOW=212, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=0, PETRI_PLACES=64, PETRI_TRANSITIONS=0} [2023-08-04 08:24:06,058 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 24 predicate places. [2023-08-04 08:24:06,059 INFO L495 AbstractCegarLoop]: Abstraction has has 64 places, 0 transitions, 0 flow [2023-08-04 08:24:06,059 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 262.6666666666667) internal successors, (1576), 6 states have internal predecessors, (1576), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:24:06,059 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2023-08-04 08:24:06,059 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2023-08-04 08:24:06,060 INFO L445 BasicCegarLoop]: Path program histogram: [2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 08:24:06,060 INFO L307 ceAbstractionStarter]: Result for error location AllErrorsAtOnce was SAFE (1/2) [2023-08-04 08:24:06,066 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 293 places, 315 transitions, 678 flow [2023-08-04 08:24:06,228 INFO L124 PetriNetUnfolderBase]: 181/1332 cut-off events. [2023-08-04 08:24:06,229 INFO L125 PetriNetUnfolderBase]: For 72/128 co-relation queries the response was YES. [2023-08-04 08:24:06,248 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1429 conditions, 1332 events. 181/1332 cut-off events. For 72/128 co-relation queries the response was YES. Maximal size of possible extension queue 30. Compared 7587 event pairs, 1 based on Foata normal form. 0/1130 useless extension candidates. Maximal degree in co-relation 783. Up to 32 conditions per place. [2023-08-04 08:24:06,248 INFO L82 GeneralOperation]: Start removeDead. Operand has 293 places, 315 transitions, 678 flow [2023-08-04 08:24:06,255 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 293 places, 315 transitions, 678 flow [2023-08-04 08:24:06,256 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-04 08:24:06,256 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 293 places, 315 transitions, 678 flow [2023-08-04 08:24:06,256 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 293 places, 315 transitions, 678 flow [2023-08-04 08:24:06,256 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 293 places, 315 transitions, 678 flow [2023-08-04 08:24:06,431 INFO L124 PetriNetUnfolderBase]: 181/1332 cut-off events. [2023-08-04 08:24:06,431 INFO L125 PetriNetUnfolderBase]: For 72/128 co-relation queries the response was YES. [2023-08-04 08:24:06,457 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1429 conditions, 1332 events. 181/1332 cut-off events. For 72/128 co-relation queries the response was YES. Maximal size of possible extension queue 30. Compared 7587 event pairs, 1 based on Foata normal form. 0/1130 useless extension candidates. Maximal degree in co-relation 783. Up to 32 conditions per place. [2023-08-04 08:24:06,508 INFO L119 LiptonReduction]: Number of co-enabled transitions 53580 [2023-08-04 08:24:13,454 INFO L134 LiptonReduction]: Checked pairs total: 56145 [2023-08-04 08:24:13,454 INFO L136 LiptonReduction]: Total number of compositions: 357 [2023-08-04 08:24:13,455 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-04 08:24:13,455 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;@27a6b8b0, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-04 08:24:13,456 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2023-08-04 08:24:13,460 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-04 08:24:13,460 INFO L124 PetriNetUnfolderBase]: 6/72 cut-off events. [2023-08-04 08:24:13,460 INFO L125 PetriNetUnfolderBase]: For 9/9 co-relation queries the response was YES. [2023-08-04 08:24:13,461 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 08:24:13,461 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1] [2023-08-04 08:24:13,461 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-04 08:24:13,461 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 08:24:13,461 INFO L85 PathProgramCache]: Analyzing trace with hash -817784076, now seen corresponding path program 1 times [2023-08-04 08:24:13,461 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 08:24:13,461 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1434660364] [2023-08-04 08:24:13,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:24:13,461 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 08:24:13,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:24:13,492 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-04 08:24:13,492 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 08:24:13,492 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1434660364] [2023-08-04 08:24:13,492 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1434660364] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 08:24:13,492 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [165504926] [2023-08-04 08:24:13,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:24:13,492 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 08:24:13,493 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 08:24:13,497 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 08:24:13,500 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-08-04 08:24:13,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:24:13,572 INFO L262 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-04 08:24:13,573 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 08:24:13,587 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-04 08:24:13,587 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 08:24:13,587 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [165504926] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 08:24:13,587 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 08:24:13,587 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 5 [2023-08-04 08:24:13,587 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [332046688] [2023-08-04 08:24:13,587 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 08:24:13,588 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 08:24:13,588 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 08:24:13,588 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 08:24:13,588 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-08-04 08:24:13,599 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 274 out of 672 [2023-08-04 08:24:13,600 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 40 places, 40 transitions, 128 flow. Second operand has 5 states, 5 states have (on average 275.6) internal successors, (1378), 5 states have internal predecessors, (1378), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:24:13,600 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 08:24:13,600 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 274 of 672 [2023-08-04 08:24:13,600 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 08:24:13,849 INFO L124 PetriNetUnfolderBase]: 1284/2372 cut-off events. [2023-08-04 08:24:13,849 INFO L125 PetriNetUnfolderBase]: For 348/348 co-relation queries the response was YES. [2023-08-04 08:24:13,852 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4823 conditions, 2372 events. 1284/2372 cut-off events. For 348/348 co-relation queries the response was YES. Maximal size of possible extension queue 91. Compared 13119 event pairs, 542 based on Foata normal form. 81/2239 useless extension candidates. Maximal degree in co-relation 1831. Up to 2121 conditions per place. [2023-08-04 08:24:13,855 INFO L140 encePairwiseOnDemand]: 666/672 looper letters, 16 selfloop transitions, 5 changer transitions 20/44 dead transitions. [2023-08-04 08:24:13,855 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 42 places, 44 transitions, 208 flow [2023-08-04 08:24:13,856 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-04 08:24:13,856 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-04 08:24:13,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1411 transitions. [2023-08-04 08:24:13,859 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4199404761904762 [2023-08-04 08:24:13,859 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1411 transitions. [2023-08-04 08:24:13,859 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1411 transitions. [2023-08-04 08:24:13,859 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 08:24:13,859 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1411 transitions. [2023-08-04 08:24:13,862 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 282.2) internal successors, (1411), 5 states have internal predecessors, (1411), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:24:13,866 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 672.0) internal successors, (4032), 6 states have internal predecessors, (4032), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:24:13,867 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 672.0) internal successors, (4032), 6 states have internal predecessors, (4032), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:24:13,868 INFO L175 Difference]: Start difference. First operand has 40 places, 40 transitions, 128 flow. Second operand 5 states and 1411 transitions. [2023-08-04 08:24:13,868 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 42 places, 44 transitions, 208 flow [2023-08-04 08:24:13,869 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 40 places, 44 transitions, 202 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-04 08:24:13,869 INFO L231 Difference]: Finished difference. Result has 41 places, 20 transitions, 75 flow [2023-08-04 08:24:13,870 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=672, PETRI_DIFFERENCE_MINUEND_FLOW=112, PETRI_DIFFERENCE_MINUEND_PLACES=36, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=75, PETRI_PLACES=41, PETRI_TRANSITIONS=20} [2023-08-04 08:24:13,870 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 1 predicate places. [2023-08-04 08:24:13,870 INFO L495 AbstractCegarLoop]: Abstraction has has 41 places, 20 transitions, 75 flow [2023-08-04 08:24:13,871 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 275.6) internal successors, (1378), 5 states have internal predecessors, (1378), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:24:13,871 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 08:24:13,871 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1] [2023-08-04 08:24:13,876 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2023-08-04 08:24:14,075 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 08:24:14,076 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-04 08:24:14,076 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 08:24:14,076 INFO L85 PathProgramCache]: Analyzing trace with hash 1960449335, now seen corresponding path program 1 times [2023-08-04 08:24:14,076 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 08:24:14,076 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1929928589] [2023-08-04 08:24:14,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:24:14,077 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 08:24:14,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:24:14,095 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-08-04 08:24:14,096 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 08:24:14,096 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1929928589] [2023-08-04 08:24:14,096 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1929928589] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 08:24:14,096 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 08:24:14,096 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-04 08:24:14,096 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [361413291] [2023-08-04 08:24:14,096 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 08:24:14,096 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 08:24:14,096 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 08:24:14,097 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 08:24:14,097 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-04 08:24:14,104 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 275 out of 672 [2023-08-04 08:24:14,105 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 20 transitions, 75 flow. Second operand has 3 states, 3 states have (on average 277.0) internal successors, (831), 3 states have internal predecessors, (831), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:24:14,105 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 08:24:14,105 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 275 of 672 [2023-08-04 08:24:14,105 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 08:24:14,159 INFO L124 PetriNetUnfolderBase]: 180/349 cut-off events. [2023-08-04 08:24:14,160 INFO L125 PetriNetUnfolderBase]: For 52/52 co-relation queries the response was YES. [2023-08-04 08:24:14,160 INFO L83 FinitePrefix]: Finished finitePrefix Result has 766 conditions, 349 events. 180/349 cut-off events. For 52/52 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 1275 event pairs, 114 based on Foata normal form. 1/350 useless extension candidates. Maximal degree in co-relation 308. Up to 313 conditions per place. [2023-08-04 08:24:14,161 INFO L140 encePairwiseOnDemand]: 669/672 looper letters, 16 selfloop transitions, 2 changer transitions 0/21 dead transitions. [2023-08-04 08:24:14,161 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 31 places, 21 transitions, 112 flow [2023-08-04 08:24:14,162 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 08:24:14,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 08:24:14,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 843 transitions. [2023-08-04 08:24:14,164 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4181547619047619 [2023-08-04 08:24:14,164 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 843 transitions. [2023-08-04 08:24:14,164 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 843 transitions. [2023-08-04 08:24:14,165 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 08:24:14,165 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 843 transitions. [2023-08-04 08:24:14,166 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 281.0) internal successors, (843), 3 states have internal predecessors, (843), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:24:14,169 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 672.0) internal successors, (2688), 4 states have internal predecessors, (2688), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:24:14,169 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 672.0) internal successors, (2688), 4 states have internal predecessors, (2688), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:24:14,169 INFO L175 Difference]: Start difference. First operand has 41 places, 20 transitions, 75 flow. Second operand 3 states and 843 transitions. [2023-08-04 08:24:14,169 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 31 places, 21 transitions, 112 flow [2023-08-04 08:24:14,170 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 30 places, 21 transitions, 109 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-08-04 08:24:14,170 INFO L231 Difference]: Finished difference. Result has 30 places, 19 transitions, 71 flow [2023-08-04 08:24:14,171 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=672, PETRI_DIFFERENCE_MINUEND_FLOW=67, PETRI_DIFFERENCE_MINUEND_PLACES=28, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=19, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=17, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=71, PETRI_PLACES=30, PETRI_TRANSITIONS=19} [2023-08-04 08:24:14,171 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, -10 predicate places. [2023-08-04 08:24:14,171 INFO L495 AbstractCegarLoop]: Abstraction has has 30 places, 19 transitions, 71 flow [2023-08-04 08:24:14,172 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 277.0) internal successors, (831), 3 states have internal predecessors, (831), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:24:14,172 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 08:24:14,172 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 08:24:14,172 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2023-08-04 08:24:14,172 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-04 08:24:14,172 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 08:24:14,172 INFO L85 PathProgramCache]: Analyzing trace with hash -1436873457, now seen corresponding path program 1 times [2023-08-04 08:24:14,172 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 08:24:14,172 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1002811902] [2023-08-04 08:24:14,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:24:14,173 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 08:24:14,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:24:14,201 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-08-04 08:24:14,201 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 08:24:14,201 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1002811902] [2023-08-04 08:24:14,201 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1002811902] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 08:24:14,201 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [320451507] [2023-08-04 08:24:14,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:24:14,201 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 08:24:14,201 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 08:24:14,202 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 08:24:14,206 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-08-04 08:24:14,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:24:14,281 INFO L262 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-04 08:24:14,282 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 08:24:14,292 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-08-04 08:24:14,292 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 08:24:14,303 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-08-04 08:24:14,304 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [320451507] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 08:24:14,304 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 08:24:14,304 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 4 [2023-08-04 08:24:14,304 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1981935752] [2023-08-04 08:24:14,304 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 08:24:14,304 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 08:24:14,306 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 08:24:14,306 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 08:24:14,306 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-04 08:24:14,319 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 274 out of 672 [2023-08-04 08:24:14,320 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 30 places, 19 transitions, 71 flow. Second operand has 5 states, 5 states have (on average 276.6) internal successors, (1383), 5 states have internal predecessors, (1383), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:24:14,320 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 08:24:14,320 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 274 of 672 [2023-08-04 08:24:14,320 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 08:24:14,370 INFO L124 PetriNetUnfolderBase]: 136/255 cut-off events. [2023-08-04 08:24:14,370 INFO L125 PetriNetUnfolderBase]: For 34/34 co-relation queries the response was YES. [2023-08-04 08:24:14,371 INFO L83 FinitePrefix]: Finished finitePrefix Result has 557 conditions, 255 events. 136/255 cut-off events. For 34/34 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 771 event pairs, 48 based on Foata normal form. 2/257 useless extension candidates. Maximal degree in co-relation 310. Up to 217 conditions per place. [2023-08-04 08:24:14,371 INFO L140 encePairwiseOnDemand]: 669/672 looper letters, 16 selfloop transitions, 3 changer transitions 0/22 dead transitions. [2023-08-04 08:24:14,371 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 33 places, 22 transitions, 114 flow [2023-08-04 08:24:14,372 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 08:24:14,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 08:24:14,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1116 transitions. [2023-08-04 08:24:14,374 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41517857142857145 [2023-08-04 08:24:14,374 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1116 transitions. [2023-08-04 08:24:14,374 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1116 transitions. [2023-08-04 08:24:14,375 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 08:24:14,375 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1116 transitions. [2023-08-04 08:24:14,377 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 279.0) internal successors, (1116), 4 states have internal predecessors, (1116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:24:14,379 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 672.0) internal successors, (3360), 5 states have internal predecessors, (3360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:24:14,380 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 672.0) internal successors, (3360), 5 states have internal predecessors, (3360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:24:14,380 INFO L175 Difference]: Start difference. First operand has 30 places, 19 transitions, 71 flow. Second operand 4 states and 1116 transitions. [2023-08-04 08:24:14,380 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 33 places, 22 transitions, 114 flow [2023-08-04 08:24:14,381 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 31 places, 22 transitions, 110 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-04 08:24:14,381 INFO L231 Difference]: Finished difference. Result has 31 places, 18 transitions, 68 flow [2023-08-04 08:24:14,381 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=672, PETRI_DIFFERENCE_MINUEND_FLOW=62, PETRI_DIFFERENCE_MINUEND_PLACES=28, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=18, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=15, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=68, PETRI_PLACES=31, PETRI_TRANSITIONS=18} [2023-08-04 08:24:14,382 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, -9 predicate places. [2023-08-04 08:24:14,382 INFO L495 AbstractCegarLoop]: Abstraction has has 31 places, 18 transitions, 68 flow [2023-08-04 08:24:14,382 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 276.6) internal successors, (1383), 5 states have internal predecessors, (1383), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:24:14,382 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 08:24:14,382 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 08:24:14,391 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2023-08-04 08:24:14,587 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 08:24:14,587 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-04 08:24:14,588 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 08:24:14,588 INFO L85 PathProgramCache]: Analyzing trace with hash -1505090938, now seen corresponding path program 1 times [2023-08-04 08:24:14,588 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 08:24:14,588 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1187187184] [2023-08-04 08:24:14,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:24:14,588 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 08:24:14,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:24:14,628 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-04 08:24:14,628 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 08:24:14,628 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1187187184] [2023-08-04 08:24:14,628 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1187187184] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 08:24:14,628 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [44955158] [2023-08-04 08:24:14,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:24:14,628 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 08:24:14,628 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 08:24:14,629 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 08:24:14,632 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-08-04 08:24:14,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:24:14,709 INFO L262 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-04 08:24:14,709 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 08:24:14,723 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-04 08:24:14,723 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 08:24:14,723 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [44955158] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 08:24:14,723 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 08:24:14,723 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 6 [2023-08-04 08:24:14,723 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [412037917] [2023-08-04 08:24:14,723 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 08:24:14,724 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 08:24:14,724 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 08:24:14,724 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 08:24:14,724 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-08-04 08:24:14,736 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 274 out of 672 [2023-08-04 08:24:14,737 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 31 places, 18 transitions, 68 flow. Second operand has 5 states, 5 states have (on average 276.6) internal successors, (1383), 5 states have internal predecessors, (1383), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:24:14,737 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 08:24:14,738 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 274 of 672 [2023-08-04 08:24:14,738 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 08:24:14,800 INFO L124 PetriNetUnfolderBase]: 104/199 cut-off events. [2023-08-04 08:24:14,800 INFO L125 PetriNetUnfolderBase]: For 42/42 co-relation queries the response was YES. [2023-08-04 08:24:14,801 INFO L83 FinitePrefix]: Finished finitePrefix Result has 449 conditions, 199 events. 104/199 cut-off events. For 42/42 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 532 event pairs, 8 based on Foata normal form. 16/215 useless extension candidates. Maximal degree in co-relation 237. Up to 80 conditions per place. [2023-08-04 08:24:14,801 INFO L140 encePairwiseOnDemand]: 669/672 looper letters, 0 selfloop transitions, 0 changer transitions 28/28 dead transitions. [2023-08-04 08:24:14,801 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 34 places, 28 transitions, 138 flow [2023-08-04 08:24:14,802 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-04 08:24:14,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-04 08:24:14,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1396 transitions. [2023-08-04 08:24:14,804 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4154761904761905 [2023-08-04 08:24:14,804 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1396 transitions. [2023-08-04 08:24:14,804 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1396 transitions. [2023-08-04 08:24:14,805 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 08:24:14,805 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1396 transitions. [2023-08-04 08:24:14,807 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 279.2) internal successors, (1396), 5 states have internal predecessors, (1396), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:24:14,811 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 672.0) internal successors, (4032), 6 states have internal predecessors, (4032), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:24:14,812 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 672.0) internal successors, (4032), 6 states have internal predecessors, (4032), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:24:14,812 INFO L175 Difference]: Start difference. First operand has 31 places, 18 transitions, 68 flow. Second operand 5 states and 1396 transitions. [2023-08-04 08:24:14,812 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 34 places, 28 transitions, 138 flow [2023-08-04 08:24:14,812 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 30 places, 28 transitions, 131 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-08-04 08:24:14,812 INFO L231 Difference]: Finished difference. Result has 30 places, 0 transitions, 0 flow [2023-08-04 08:24:14,813 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=672, PETRI_DIFFERENCE_MINUEND_FLOW=57, PETRI_DIFFERENCE_MINUEND_PLACES=26, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=17, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=17, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=0, PETRI_PLACES=30, PETRI_TRANSITIONS=0} [2023-08-04 08:24:14,813 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, -10 predicate places. [2023-08-04 08:24:14,813 INFO L495 AbstractCegarLoop]: Abstraction has has 30 places, 0 transitions, 0 flow [2023-08-04 08:24:14,813 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 276.6) internal successors, (1383), 5 states have internal predecessors, (1383), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:24:14,814 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2023-08-04 08:24:14,814 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 2 remaining) [2023-08-04 08:24:14,821 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2023-08-04 08:24:15,018 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 08:24:15,018 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1] [2023-08-04 08:24:15,019 INFO L307 ceAbstractionStarter]: Result for error location InUseError was SAFE,SAFE (2/2) [2023-08-04 08:24:15,019 INFO L228 ceAbstractionStarter]: Analysis of concurrent program completed with 2 thread instances [2023-08-04 08:24:15,019 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2023-08-04 08:24:15,024 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 04.08 08:24:15 BasicIcfg [2023-08-04 08:24:15,024 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-08-04 08:24:15,025 INFO L158 Benchmark]: Toolchain (without parser) took 42859.67ms. Allocated memory was 534.8MB in the beginning and 926.9MB in the end (delta: 392.2MB). Free memory was 481.5MB in the beginning and 388.6MB in the end (delta: 92.9MB). Peak memory consumption was 486.5MB. Max. memory is 16.0GB. [2023-08-04 08:24:15,025 INFO L158 Benchmark]: CDTParser took 0.11ms. Allocated memory is still 350.2MB. Free memory is still 297.5MB. There was no memory consumed. Max. memory is 16.0GB. [2023-08-04 08:24:15,025 INFO L158 Benchmark]: CACSL2BoogieTranslator took 282.92ms. Allocated memory is still 534.8MB. Free memory was 481.5MB in the beginning and 470.0MB in the end (delta: 11.5MB). Peak memory consumption was 10.5MB. Max. memory is 16.0GB. [2023-08-04 08:24:15,025 INFO L158 Benchmark]: Boogie Procedure Inliner took 57.30ms. Allocated memory is still 534.8MB. Free memory was 470.0MB in the beginning and 467.9MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. [2023-08-04 08:24:15,025 INFO L158 Benchmark]: Boogie Preprocessor took 24.71ms. Allocated memory is still 534.8MB. Free memory was 467.9MB in the beginning and 466.1MB in the end (delta: 1.7MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. [2023-08-04 08:24:15,026 INFO L158 Benchmark]: RCFGBuilder took 568.27ms. Allocated memory is still 534.8MB. Free memory was 466.1MB in the beginning and 447.2MB in the end (delta: 18.9MB). Peak memory consumption was 18.9MB. Max. memory is 16.0GB. [2023-08-04 08:24:15,026 INFO L158 Benchmark]: TraceAbstraction took 41919.45ms. Allocated memory was 534.8MB in the beginning and 926.9MB in the end (delta: 392.2MB). Free memory was 446.5MB in the beginning and 388.6MB in the end (delta: 57.9MB). Peak memory consumption was 452.9MB. Max. memory is 16.0GB. [2023-08-04 08:24:15,027 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.11ms. Allocated memory is still 350.2MB. Free memory is still 297.5MB. There was no memory consumed. Max. memory is 16.0GB. * CACSL2BoogieTranslator took 282.92ms. Allocated memory is still 534.8MB. Free memory was 481.5MB in the beginning and 470.0MB in the end (delta: 11.5MB). Peak memory consumption was 10.5MB. Max. memory is 16.0GB. * Boogie Procedure Inliner took 57.30ms. Allocated memory is still 534.8MB. Free memory was 470.0MB in the beginning and 467.9MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. * Boogie Preprocessor took 24.71ms. Allocated memory is still 534.8MB. Free memory was 467.9MB in the beginning and 466.1MB in the end (delta: 1.7MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. * RCFGBuilder took 568.27ms. Allocated memory is still 534.8MB. Free memory was 466.1MB in the beginning and 447.2MB in the end (delta: 18.9MB). Peak memory consumption was 18.9MB. Max. memory is 16.0GB. * TraceAbstraction took 41919.45ms. Allocated memory was 534.8MB in the beginning and 926.9MB in the end (delta: 392.2MB). Free memory was 446.5MB in the beginning and 388.6MB in the end (delta: 57.9MB). Peak memory consumption was 452.9MB. Max. memory is 16.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 5.7s, 201 PlacesBefore, 30 PlacesAfterwards, 215 TransitionsBefore, 30 TransitionsAfterwards, 17014 CoEnabledTransitionPairs, 8 FixpointIterations, 43 TrivialSequentialCompositions, 127 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 50 ConcurrentYvCompositions, 14 ChoiceCompositions, 234 TotalNumberOfCompositions, 16783 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 16137, independent: 16090, independent conditional: 0, independent unconditional: 16090, dependent: 47, dependent conditional: 0, dependent unconditional: 47, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: SyntacticIndependenceRelation.Independence Queries: [ total: 10019, independent: 9997, independent conditional: 0, independent unconditional: 9997, dependent: 22, dependent conditional: 0, dependent unconditional: 22, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Cache Queries: [ total: 16137, independent: 6093, independent conditional: 0, independent unconditional: 6093, dependent: 25, dependent conditional: 0, dependent unconditional: 25, unknown: 10019, unknown conditional: 0, unknown unconditional: 10019] , Statistics on independence cache: Total cache size (in pairs): 34, Positive cache size: 30, Positive conditional cache size: 0, Positive unconditional cache size: 30, Negative cache size: 4, Negative conditional cache size: 0, Negative unconditional cache size: 4, Unknown cache size: 0, Unknown conditional cache size: 0, Unknown unconditional cache size: 0 - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 5.2s, 201 PlacesBefore, 30 PlacesAfterwards, 215 TransitionsBefore, 30 TransitionsAfterwards, 17014 CoEnabledTransitionPairs, 8 FixpointIterations, 43 TrivialSequentialCompositions, 131 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 51 ConcurrentYvCompositions, 14 ChoiceCompositions, 239 TotalNumberOfCompositions, 17147 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 16435, independent: 16392, independent conditional: 0, independent unconditional: 16392, dependent: 43, dependent conditional: 0, dependent unconditional: 43, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: SyntacticIndependenceRelation.Independence Queries: [ total: 10127, independent: 10106, independent conditional: 0, independent unconditional: 10106, dependent: 21, dependent conditional: 0, dependent unconditional: 21, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Cache Queries: [ total: 16435, independent: 6286, independent conditional: 0, independent unconditional: 6286, dependent: 22, dependent conditional: 0, dependent unconditional: 22, unknown: 10127, unknown conditional: 0, unknown unconditional: 10127] , Statistics on independence cache: Total cache size (in pairs): 24, Positive cache size: 20, Positive conditional cache size: 0, Positive unconditional cache size: 20, Negative cache size: 4, Negative conditional cache size: 0, Negative unconditional cache size: 4, Unknown cache size: 0, Unknown conditional cache size: 0, Unknown unconditional cache size: 0 - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 6.9s, 293 PlacesBefore, 40 PlacesAfterwards, 315 TransitionsBefore, 40 TransitionsAfterwards, 53580 CoEnabledTransitionPairs, 8 FixpointIterations, 43 TrivialSequentialCompositions, 201 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 89 ConcurrentYvCompositions, 22 ChoiceCompositions, 355 TotalNumberOfCompositions, 55976 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 53494, independent: 53434, independent conditional: 0, independent unconditional: 53434, dependent: 60, dependent conditional: 0, dependent unconditional: 60, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: SyntacticIndependenceRelation.Independence Queries: [ total: 31703, independent: 31671, independent conditional: 0, independent unconditional: 31671, dependent: 32, dependent conditional: 0, dependent unconditional: 32, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Cache Queries: [ total: 53494, independent: 21763, independent conditional: 0, independent unconditional: 21763, dependent: 28, dependent conditional: 0, dependent unconditional: 28, unknown: 31703, unknown conditional: 0, unknown unconditional: 31703] , Statistics on independence cache: Total cache size (in pairs): 64, Positive cache size: 58, Positive conditional cache size: 0, Positive unconditional cache size: 58, Negative cache size: 6, Negative conditional cache size: 0, Negative unconditional cache size: 6, Unknown cache size: 0, Unknown conditional cache size: 0, Unknown unconditional cache size: 0 - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 7.2s, 293 PlacesBefore, 40 PlacesAfterwards, 315 TransitionsBefore, 40 TransitionsAfterwards, 53580 CoEnabledTransitionPairs, 8 FixpointIterations, 43 TrivialSequentialCompositions, 200 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 92 ConcurrentYvCompositions, 22 ChoiceCompositions, 357 TotalNumberOfCompositions, 56145 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 54209, independent: 54154, independent conditional: 0, independent unconditional: 54154, dependent: 55, dependent conditional: 0, dependent unconditional: 55, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: SyntacticIndependenceRelation.Independence Queries: [ total: 31742, independent: 31716, independent conditional: 0, independent unconditional: 31716, dependent: 26, dependent conditional: 0, dependent unconditional: 26, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Cache Queries: [ total: 54209, independent: 22438, independent conditional: 0, independent unconditional: 22438, dependent: 29, dependent conditional: 0, dependent unconditional: 29, unknown: 31742, unknown conditional: 0, unknown unconditional: 31742] , Statistics on independence cache: Total cache size (in pairs): 93, Positive cache size: 88, Positive conditional cache size: 0, Positive unconditional cache size: 88, Negative cache size: 5, Negative conditional cache size: 0, Negative unconditional cache size: 5, Unknown cache size: 0, Unknown conditional cache size: 0, Unknown unconditional cache size: 0 - PositiveResult [Line: 77]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 5 procedures, 285 locations, 3 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 0.0s, RemoveRedundantFlowTime: 0.0s, RemoveRedundantFlowUnfoldingTime: 0.0s, BackfoldingTime: 0.0s, BackfoldingUnfoldingTime: 0.0s, FlowIncreaseByBackfolding: 0, BasicCegarLoop: OverallTime: 8.4s, OverallIterations: 5, TraceHistogramMax: 1, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 0.5s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 5.9s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 95 SdHoareTripleChecker+Valid, 0.2s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 43 mSDsluCounter, 10 SdHoareTripleChecker+Invalid, 0.2s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 0 mSDsCounter, 14 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 245 IncrementalHoareTripleChecker+Invalid, 259 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 14 mSolverCounterUnsat, 10 mSDtfsCounter, 245 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 101 GetRequests, 86 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=86occurred in iteration=4, InterpolantAutomatonStates: 16, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.6s InterpolantComputationTime, 142 NumberOfCodeBlocks, 142 NumberOfCodeBlocksAsserted, 9 NumberOfCheckSat, 156 ConstructedInterpolants, 0 QuantifiedInterpolants, 220 SizeOfPredicates, 0 NumberOfNonLiveVariables, 539 ConjunctsInSsa, 9 ConjunctsInUnsatCore, 10 InterpolantComputations, 4 PerfectInterpolantSequences, 18/24 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - StatisticsResult: Ultimate Automizer benchmark data with 2 thread instances CFG has 7 procedures, 373 locations, 3 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 0.0s, RemoveRedundantFlowTime: 0.0s, RemoveRedundantFlowUnfoldingTime: 0.0s, BackfoldingTime: 0.0s, BackfoldingUnfoldingTime: 0.0s, FlowIncreaseByBackfolding: 0, BasicCegarLoop: OverallTime: 19.0s, OverallIterations: 10, TraceHistogramMax: 2, PathProgramHistogramMax: 2, EmptinessCheckTime: 0.0s, AutomataDifference: 3.5s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 7.1s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 545 SdHoareTripleChecker+Valid, 1.1s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 438 mSDsluCounter, 176 SdHoareTripleChecker+Invalid, 0.9s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 162 mSDsCounter, 50 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 1513 IncrementalHoareTripleChecker+Invalid, 1563 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 50 mSolverCounterUnsat, 14 mSDtfsCounter, 1513 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 431 GetRequests, 378 SyntacticMatches, 11 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.7s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=222occurred in iteration=9, InterpolantAutomatonStates: 42, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.4s SatisfiabilityAnalysisTime, 5.6s InterpolantComputationTime, 494 NumberOfCodeBlocks, 494 NumberOfCodeBlocksAsserted, 18 NumberOfCheckSat, 644 ConstructedInterpolants, 0 QuantifiedInterpolants, 6140 SizeOfPredicates, 28 NumberOfNonLiveVariables, 1492 ConjunctsInSsa, 64 ConjunctsInUnsatCore, 23 InterpolantComputations, 5 PerfectInterpolantSequences, 214/235 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - StatisticsResult: Ultimate Automizer benchmark data for thread instance sufficiency with 1 thread instances CFG has 5 procedures, 285 locations, 3 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 0.0s, RemoveRedundantFlowTime: 0.0s, RemoveRedundantFlowUnfoldingTime: 0.0s, BackfoldingTime: 0.0s, BackfoldingUnfoldingTime: 0.0s, FlowIncreaseByBackfolding: 0, BasicCegarLoop: OverallTime: 5.3s, OverallIterations: 1, TraceHistogramMax: 2, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 0.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 5.3s, HoareTripleCheckerStatistics: , PredicateUnifierStatistics: No data available, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=82occurred in iteration=0, InterpolantAutomatonStates: 0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.0s InterpolantComputationTime, 6 NumberOfCodeBlocks, 6 NumberOfCodeBlocksAsserted, 1 NumberOfCheckSat, 0 ConstructedInterpolants, 0 QuantifiedInterpolants, 0 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 0 InterpolantComputations, 0 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - StatisticsResult: Ultimate Automizer benchmark data for thread instance sufficiency with 2 thread instances CFG has 7 procedures, 373 locations, 3 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 0.0s, RemoveRedundantFlowTime: 0.0s, RemoveRedundantFlowUnfoldingTime: 0.0s, BackfoldingTime: 0.0s, BackfoldingUnfoldingTime: 0.0s, FlowIncreaseByBackfolding: 0, BasicCegarLoop: OverallTime: 9.0s, OverallIterations: 4, TraceHistogramMax: 3, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 0.5s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 7.4s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 134 SdHoareTripleChecker+Valid, 0.2s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 101 mSDsluCounter, 8 SdHoareTripleChecker+Invalid, 0.1s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 0 mSDsCounter, 12 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 225 IncrementalHoareTripleChecker+Invalid, 237 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 12 mSolverCounterUnsat, 8 mSDtfsCounter, 225 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 73 GetRequests, 59 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=128occurred in iteration=0, InterpolantAutomatonStates: 17, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.1s InterpolantComputationTime, 106 NumberOfCodeBlocks, 106 NumberOfCodeBlocksAsserted, 7 NumberOfCheckSat, 114 ConstructedInterpolants, 0 QuantifiedInterpolants, 218 SizeOfPredicates, 0 NumberOfNonLiveVariables, 345 ConjunctsInSsa, 11 ConjunctsInUnsatCore, 8 InterpolantComputations, 3 PerfectInterpolantSequences, 66/79 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2023-08-04 08:24:15,059 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...