/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 TOGETHER -tc /storage/repos/CAV22/benchmarks/AutomizerCInline.xml -i /storage/repos/CAV22/benchmarks/increased_bounds/weaver_unroll-4.wvr_bound2.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-19404b3-m [2023-08-03 21:12:16,741 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-08-03 21:12:16,789 INFO L114 SettingsManager]: Loading settings from /storage/repos/CAV22/benchmarks/svcomp-Reach-32bit-Automizer_Default.epf [2023-08-03 21:12:16,793 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-08-03 21:12:16,794 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-08-03 21:12:16,794 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Translation Mode: [2023-08-03 21:12:16,795 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Checked method. Library mode if empty. [2023-08-03 21:12:16,816 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-03 21:12:16,817 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-03 21:12:16,817 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-03 21:12:16,818 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-03 21:12:16,818 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-03 21:12:16,819 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-03 21:12:16,819 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-08-03 21:12:16,819 INFO L153 SettingsManager]: * Use SBE=true [2023-08-03 21:12:16,820 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-03 21:12:16,820 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-03 21:12:16,820 INFO L153 SettingsManager]: * sizeof long=4 [2023-08-03 21:12:16,824 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-03 21:12:16,824 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-08-03 21:12:16,827 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-08-03 21:12:16,828 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-03 21:12:16,828 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-03 21:12:16,829 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-03 21:12:16,831 INFO L153 SettingsManager]: * sizeof long double=12 [2023-08-03 21:12:16,831 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-08-03 21:12:16,831 INFO L153 SettingsManager]: * Use constant arrays=true [2023-08-03 21:12:16,832 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-03 21:12:16,832 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-03 21:12:16,832 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-03 21:12:16,833 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-03 21:12:16,833 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-03 21:12:16,834 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-03 21:12:16,834 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-03 21:12:16,834 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-03 21:12:16,834 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-03 21:12:16,834 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-03 21:12:16,834 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-08-03 21:12:16,835 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-03 21:12:16,835 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-03 21:12:16,835 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-03 21:12:16,835 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Order of the error locations to be checked -> TOGETHER [2023-08-03 21:12:17,094 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-03 21:12:17,119 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-03 21:12:17,121 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-03 21:12:17,122 INFO L270 PluginConnector]: Initializing CDTParser... [2023-08-03 21:12:17,123 INFO L274 PluginConnector]: CDTParser initialized [2023-08-03 21:12:17,123 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/CAV22/benchmarks/increased_bounds/weaver_unroll-4.wvr_bound2.c [2023-08-03 21:12:18,344 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-08-03 21:12:18,522 INFO L384 CDTParser]: Found 1 translation units. [2023-08-03 21:12:18,523 INFO L180 CDTParser]: Scanning /storage/repos/CAV22/benchmarks/increased_bounds/weaver_unroll-4.wvr_bound2.c [2023-08-03 21:12:18,530 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3fb63ae7b/99985f12921a42bbb11ca685842409e9/FLAG36cdc09f6 [2023-08-03 21:12:18,544 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3fb63ae7b/99985f12921a42bbb11ca685842409e9 [2023-08-03 21:12:18,547 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-03 21:12:18,548 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-08-03 21:12:18,549 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-03 21:12:18,549 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-03 21:12:18,552 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-03 21:12:18,553 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.08 09:12:18" (1/1) ... [2023-08-03 21:12:18,554 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5293f926 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 09:12:18, skipping insertion in model container [2023-08-03 21:12:18,554 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.08 09:12:18" (1/1) ... [2023-08-03 21:12:18,574 INFO L176 MainTranslator]: Built tables and reachable declarations [2023-08-03 21:12:18,732 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/CAV22/benchmarks/increased_bounds/weaver_unroll-4.wvr_bound2.c[2734,2747] [2023-08-03 21:12:18,744 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-03 21:12:18,754 INFO L201 MainTranslator]: Completed pre-run [2023-08-03 21:12:18,781 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/CAV22/benchmarks/increased_bounds/weaver_unroll-4.wvr_bound2.c[2734,2747] [2023-08-03 21:12:18,784 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-03 21:12:18,796 INFO L206 MainTranslator]: Completed translation [2023-08-03 21:12:18,797 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 09:12:18 WrapperNode [2023-08-03 21:12:18,797 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-03 21:12:18,798 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-03 21:12:18,798 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-03 21:12:18,798 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-03 21:12:18,809 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 09:12:18" (1/1) ... [2023-08-03 21:12:18,816 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 09:12:18" (1/1) ... [2023-08-03 21:12:18,838 INFO L138 Inliner]: procedures = 24, calls = 36, calls flagged for inlining = 13, calls inlined = 13, statements flattened = 189 [2023-08-03 21:12:18,839 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-03 21:12:18,839 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-03 21:12:18,840 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-03 21:12:18,840 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-08-03 21:12:18,848 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 09:12:18" (1/1) ... [2023-08-03 21:12:18,849 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 09:12:18" (1/1) ... [2023-08-03 21:12:18,861 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 09:12:18" (1/1) ... [2023-08-03 21:12:18,861 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 09:12:18" (1/1) ... [2023-08-03 21:12:18,873 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 09:12:18" (1/1) ... [2023-08-03 21:12:18,877 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 09:12:18" (1/1) ... [2023-08-03 21:12:18,879 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 09:12:18" (1/1) ... [2023-08-03 21:12:18,885 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 09:12:18" (1/1) ... [2023-08-03 21:12:18,888 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-03 21:12:18,889 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-03 21:12:18,889 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-08-03 21:12:18,889 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-08-03 21:12:18,889 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 09:12:18" (1/1) ... [2023-08-03 21:12:18,895 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-03 21:12:18,908 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-03 21:12:18,920 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) [2023-08-03 21:12:18,921 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 [2023-08-03 21:12:18,945 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-03 21:12:18,945 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-08-03 21:12:18,945 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-08-03 21:12:18,946 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-08-03 21:12:18,946 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-08-03 21:12:18,946 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-03 21:12:18,946 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-03 21:12:18,946 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-03 21:12:18,946 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-08-03 21:12:18,946 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-03 21:12:18,946 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-03 21:12:18,947 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-03 21:12:18,947 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-03 21:12:18,948 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-08-03 21:12:19,044 INFO L236 CfgBuilder]: Building ICFG [2023-08-03 21:12:19,046 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-03 21:12:19,427 INFO L277 CfgBuilder]: Performing block encoding [2023-08-03 21:12:19,435 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-03 21:12:19,435 INFO L302 CfgBuilder]: Removed 7 assume(true) statements. [2023-08-03 21:12:19,437 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.08 09:12:19 BoogieIcfgContainer [2023-08-03 21:12:19,437 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-03 21:12:19,439 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-03 21:12:19,439 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-08-03 21:12:19,442 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-08-03 21:12:19,442 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.08 09:12:18" (1/3) ... [2023-08-03 21:12:19,443 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@52880215 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.08 09:12:19, skipping insertion in model container [2023-08-03 21:12:19,443 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 09:12:18" (2/3) ... [2023-08-03 21:12:19,443 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@52880215 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.08 09:12:19, skipping insertion in model container [2023-08-03 21:12:19,444 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.08 09:12:19" (3/3) ... [2023-08-03 21:12:19,445 INFO L112 eAbstractionObserver]: Analyzing ICFG weaver_unroll-4.wvr_bound2.c [2023-08-03 21:12:19,455 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-08-03 21:12:19,464 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-03 21:12:19,467 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-08-03 21:12:19,467 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-03 21:12:19,570 INFO L144 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2023-08-03 21:12:19,616 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 194 places, 213 transitions, 448 flow [2023-08-03 21:12:19,784 INFO L124 PetriNetUnfolderBase]: 47/401 cut-off events. [2023-08-03 21:12:19,785 INFO L125 PetriNetUnfolderBase]: For 8/8 co-relation queries the response was YES. [2023-08-03 21:12:19,796 INFO L83 FinitePrefix]: Finished finitePrefix Result has 421 conditions, 401 events. 47/401 cut-off events. For 8/8 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 1299 event pairs, 0 based on Foata normal form. 0/344 useless extension candidates. Maximal degree in co-relation 214. Up to 8 conditions per place. [2023-08-03 21:12:19,796 INFO L82 GeneralOperation]: Start removeDead. Operand has 194 places, 213 transitions, 448 flow [2023-08-03 21:12:19,804 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 194 places, 213 transitions, 448 flow [2023-08-03 21:12:19,806 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-03 21:12:19,813 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 194 places, 213 transitions, 448 flow [2023-08-03 21:12:19,815 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 194 places, 213 transitions, 448 flow [2023-08-03 21:12:19,816 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 194 places, 213 transitions, 448 flow [2023-08-03 21:12:19,856 INFO L124 PetriNetUnfolderBase]: 47/401 cut-off events. [2023-08-03 21:12:19,856 INFO L125 PetriNetUnfolderBase]: For 8/8 co-relation queries the response was YES. [2023-08-03 21:12:19,858 INFO L83 FinitePrefix]: Finished finitePrefix Result has 421 conditions, 401 events. 47/401 cut-off events. For 8/8 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 1299 event pairs, 0 based on Foata normal form. 0/344 useless extension candidates. Maximal degree in co-relation 214. Up to 8 conditions per place. [2023-08-03 21:12:19,865 INFO L119 LiptonReduction]: Number of co-enabled transitions 10128 [2023-08-03 21:12:24,294 INFO L134 LiptonReduction]: Checked pairs total: 13811 [2023-08-03 21:12:24,295 INFO L136 LiptonReduction]: Total number of compositions: 222 [2023-08-03 21:12:24,317 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-03 21:12:24,324 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;@6e5e7385, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-03 21:12:24,324 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2023-08-03 21:12:24,332 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-03 21:12:24,332 INFO L124 PetriNetUnfolderBase]: 2/15 cut-off events. [2023-08-03 21:12:24,332 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-03 21:12:24,332 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 21:12:24,333 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-08-03 21:12:24,333 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-03 21:12:24,338 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 21:12:24,338 INFO L85 PathProgramCache]: Analyzing trace with hash -357889986, now seen corresponding path program 1 times [2023-08-03 21:12:24,345 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 21:12:24,346 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [806911319] [2023-08-03 21:12:24,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 21:12:24,346 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 21:12:24,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 21:12:24,578 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-03 21:12:24,579 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 21:12:24,579 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [806911319] [2023-08-03 21:12:24,579 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [806911319] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-03 21:12:24,580 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-03 21:12:24,580 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-03 21:12:24,581 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [761445520] [2023-08-03 21:12:24,581 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-03 21:12:24,588 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-03 21:12:24,592 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 21:12:24,608 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-03 21:12:24,609 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-03 21:12:24,628 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 185 out of 435 [2023-08-03 21:12:24,633 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 38 places, 41 transitions, 104 flow. Second operand has 3 states, 3 states have (on average 187.0) internal successors, (561), 3 states have internal predecessors, (561), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 21:12:24,633 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 21:12:24,633 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 185 of 435 [2023-08-03 21:12:24,634 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 21:12:24,832 INFO L124 PetriNetUnfolderBase]: 857/1337 cut-off events. [2023-08-03 21:12:24,833 INFO L125 PetriNetUnfolderBase]: For 61/61 co-relation queries the response was YES. [2023-08-03 21:12:24,835 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2698 conditions, 1337 events. 857/1337 cut-off events. For 61/61 co-relation queries the response was YES. Maximal size of possible extension queue 72. Compared 5965 event pairs, 400 based on Foata normal form. 0/917 useless extension candidates. Maximal degree in co-relation 2309. Up to 1295 conditions per place. [2023-08-03 21:12:24,842 INFO L140 encePairwiseOnDemand]: 430/435 looper letters, 35 selfloop transitions, 2 changer transitions 0/43 dead transitions. [2023-08-03 21:12:24,842 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 39 places, 43 transitions, 182 flow [2023-08-03 21:12:24,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-03 21:12:24,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-03 21:12:24,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 596 transitions. [2023-08-03 21:12:24,863 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4567049808429119 [2023-08-03 21:12:24,864 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 596 transitions. [2023-08-03 21:12:24,864 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 596 transitions. [2023-08-03 21:12:24,868 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 21:12:24,870 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 596 transitions. [2023-08-03 21:12:24,875 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 198.66666666666666) internal successors, (596), 3 states have internal predecessors, (596), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 21:12:24,882 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 435.0) internal successors, (1740), 4 states have internal predecessors, (1740), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 21:12:24,883 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 435.0) internal successors, (1740), 4 states have internal predecessors, (1740), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 21:12:24,885 INFO L175 Difference]: Start difference. First operand has 38 places, 41 transitions, 104 flow. Second operand 3 states and 596 transitions. [2023-08-03 21:12:24,886 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 39 places, 43 transitions, 182 flow [2023-08-03 21:12:24,891 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 39 places, 43 transitions, 182 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-03 21:12:24,893 INFO L231 Difference]: Finished difference. Result has 40 places, 39 transitions, 108 flow [2023-08-03 21:12:24,895 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=435, PETRI_DIFFERENCE_MINUEND_FLOW=100, PETRI_DIFFERENCE_MINUEND_PLACES=37, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=108, PETRI_PLACES=40, PETRI_TRANSITIONS=39} [2023-08-03 21:12:24,898 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 2 predicate places. [2023-08-03 21:12:24,899 INFO L495 AbstractCegarLoop]: Abstraction has has 40 places, 39 transitions, 108 flow [2023-08-03 21:12:24,899 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 187.0) internal successors, (561), 3 states have internal predecessors, (561), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 21:12:24,899 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 21:12:24,899 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1] [2023-08-03 21:12:24,900 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-03 21:12:24,900 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-03 21:12:24,907 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 21:12:24,907 INFO L85 PathProgramCache]: Analyzing trace with hash 1864065581, now seen corresponding path program 1 times [2023-08-03 21:12:24,908 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 21:12:24,908 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1984694149] [2023-08-03 21:12:24,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 21:12:24,908 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 21:12:24,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 21:12:25,072 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-03 21:12:25,072 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 21:12:25,073 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1984694149] [2023-08-03 21:12:25,073 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1984694149] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-03 21:12:25,073 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-03 21:12:25,073 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-03 21:12:25,073 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [205835961] [2023-08-03 21:12:25,073 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-03 21:12:25,074 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-03 21:12:25,074 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 21:12:25,075 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-03 21:12:25,075 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-03 21:12:25,092 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 185 out of 435 [2023-08-03 21:12:25,093 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 40 places, 39 transitions, 108 flow. Second operand has 3 states, 3 states have (on average 186.66666666666666) internal successors, (560), 3 states have internal predecessors, (560), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 21:12:25,093 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 21:12:25,093 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 185 of 435 [2023-08-03 21:12:25,093 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 21:12:25,258 INFO L124 PetriNetUnfolderBase]: 857/1338 cut-off events. [2023-08-03 21:12:25,258 INFO L125 PetriNetUnfolderBase]: For 65/65 co-relation queries the response was YES. [2023-08-03 21:12:25,260 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2713 conditions, 1338 events. 857/1338 cut-off events. For 65/65 co-relation queries the response was YES. Maximal size of possible extension queue 72. Compared 5950 event pairs, 580 based on Foata normal form. 1/924 useless extension candidates. Maximal degree in co-relation 2319. Up to 1301 conditions per place. [2023-08-03 21:12:25,265 INFO L140 encePairwiseOnDemand]: 432/435 looper letters, 32 selfloop transitions, 2 changer transitions 0/40 dead transitions. [2023-08-03 21:12:25,266 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 42 places, 40 transitions, 178 flow [2023-08-03 21:12:25,267 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-03 21:12:25,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-03 21:12:25,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 590 transitions. [2023-08-03 21:12:25,268 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4521072796934866 [2023-08-03 21:12:25,268 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 590 transitions. [2023-08-03 21:12:25,268 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 590 transitions. [2023-08-03 21:12:25,269 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 21:12:25,269 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 590 transitions. [2023-08-03 21:12:25,270 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 196.66666666666666) internal successors, (590), 3 states have internal predecessors, (590), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 21:12:25,272 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 435.0) internal successors, (1740), 4 states have internal predecessors, (1740), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 21:12:25,273 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 435.0) internal successors, (1740), 4 states have internal predecessors, (1740), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 21:12:25,273 INFO L175 Difference]: Start difference. First operand has 40 places, 39 transitions, 108 flow. Second operand 3 states and 590 transitions. [2023-08-03 21:12:25,273 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 42 places, 40 transitions, 178 flow [2023-08-03 21:12:25,275 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 40 places, 40 transitions, 174 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-03 21:12:25,275 INFO L231 Difference]: Finished difference. Result has 41 places, 40 transitions, 116 flow [2023-08-03 21:12:25,276 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=435, PETRI_DIFFERENCE_MINUEND_FLOW=104, PETRI_DIFFERENCE_MINUEND_PLACES=38, 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=116, PETRI_PLACES=41, PETRI_TRANSITIONS=40} [2023-08-03 21:12:25,276 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 3 predicate places. [2023-08-03 21:12:25,277 INFO L495 AbstractCegarLoop]: Abstraction has has 41 places, 40 transitions, 116 flow [2023-08-03 21:12:25,277 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 186.66666666666666) internal successors, (560), 3 states have internal predecessors, (560), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 21:12:25,277 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 21:12:25,277 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1] [2023-08-03 21:12:25,277 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-08-03 21:12:25,278 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-03 21:12:25,278 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 21:12:25,278 INFO L85 PathProgramCache]: Analyzing trace with hash 1627013295, now seen corresponding path program 1 times [2023-08-03 21:12:25,278 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 21:12:25,278 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [531456179] [2023-08-03 21:12:25,279 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 21:12:25,279 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 21:12:25,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-03 21:12:25,301 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-03 21:12:25,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-03 21:12:25,338 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-03 21:12:25,338 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-03 21:12:25,339 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (2 of 3 remaining) [2023-08-03 21:12:25,340 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (1 of 3 remaining) [2023-08-03 21:12:25,340 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 3 remaining) [2023-08-03 21:12:25,341 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-08-03 21:12:25,341 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1] [2023-08-03 21:12:25,343 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-03 21:12:25,343 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-08-03 21:12:25,399 INFO L144 ThreadInstanceAdder]: Constructed 8 joinOtherThreadTransitions. [2023-08-03 21:12:25,408 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 268 places, 296 transitions, 640 flow [2023-08-03 21:12:25,591 INFO L124 PetriNetUnfolderBase]: 165/1177 cut-off events. [2023-08-03 21:12:25,591 INFO L125 PetriNetUnfolderBase]: For 72/72 co-relation queries the response was YES. [2023-08-03 21:12:25,606 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1274 conditions, 1177 events. 165/1177 cut-off events. For 72/72 co-relation queries the response was YES. Maximal size of possible extension queue 27. Compared 6750 event pairs, 2 based on Foata normal form. 0/1009 useless extension candidates. Maximal degree in co-relation 730. Up to 32 conditions per place. [2023-08-03 21:12:25,607 INFO L82 GeneralOperation]: Start removeDead. Operand has 268 places, 296 transitions, 640 flow [2023-08-03 21:12:25,616 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 268 places, 296 transitions, 640 flow [2023-08-03 21:12:25,616 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-03 21:12:25,616 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 268 places, 296 transitions, 640 flow [2023-08-03 21:12:25,616 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 268 places, 296 transitions, 640 flow [2023-08-03 21:12:25,617 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 268 places, 296 transitions, 640 flow [2023-08-03 21:12:25,839 INFO L124 PetriNetUnfolderBase]: 165/1177 cut-off events. [2023-08-03 21:12:25,839 INFO L125 PetriNetUnfolderBase]: For 72/72 co-relation queries the response was YES. [2023-08-03 21:12:25,847 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1274 conditions, 1177 events. 165/1177 cut-off events. For 72/72 co-relation queries the response was YES. Maximal size of possible extension queue 27. Compared 6750 event pairs, 2 based on Foata normal form. 0/1009 useless extension candidates. Maximal degree in co-relation 730. Up to 32 conditions per place. [2023-08-03 21:12:25,889 INFO L119 LiptonReduction]: Number of co-enabled transitions 33576 [2023-08-03 21:12:30,691 INFO L134 LiptonReduction]: Checked pairs total: 62008 [2023-08-03 21:12:30,691 INFO L136 LiptonReduction]: Total number of compositions: 280 [2023-08-03 21:12:30,693 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-03 21:12:30,694 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;@6e5e7385, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-03 21:12:30,694 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2023-08-03 21:12:30,697 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-03 21:12:30,697 INFO L124 PetriNetUnfolderBase]: 1/14 cut-off events. [2023-08-03 21:12:30,697 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-03 21:12:30,697 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 21:12:30,697 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-08-03 21:12:30,697 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-03 21:12:30,698 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 21:12:30,698 INFO L85 PathProgramCache]: Analyzing trace with hash 1912697259, now seen corresponding path program 1 times [2023-08-03 21:12:30,698 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 21:12:30,698 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [457126725] [2023-08-03 21:12:30,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 21:12:30,698 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 21:12:30,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 21:12:30,726 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-03 21:12:30,727 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 21:12:30,727 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [457126725] [2023-08-03 21:12:30,727 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [457126725] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-03 21:12:30,727 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-03 21:12:30,727 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-03 21:12:30,727 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1120780527] [2023-08-03 21:12:30,727 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-03 21:12:30,728 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-03 21:12:30,728 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 21:12:30,728 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-03 21:12:30,728 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-03 21:12:30,738 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 255 out of 576 [2023-08-03 21:12:30,739 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 80 transitions, 208 flow. Second operand has 3 states, 3 states have (on average 257.0) internal successors, (771), 3 states have internal predecessors, (771), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 21:12:30,740 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 21:12:30,740 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 255 of 576 [2023-08-03 21:12:30,740 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 21:12:56,667 INFO L124 PetriNetUnfolderBase]: 334737/416393 cut-off events. [2023-08-03 21:12:56,667 INFO L125 PetriNetUnfolderBase]: For 26107/26107 co-relation queries the response was YES. [2023-08-03 21:12:57,424 INFO L83 FinitePrefix]: Finished finitePrefix Result has 841439 conditions, 416393 events. 334737/416393 cut-off events. For 26107/26107 co-relation queries the response was YES. Maximal size of possible extension queue 8540. Compared 2456080 event pairs, 197425 based on Foata normal form. 27202/299361 useless extension candidates. Maximal degree in co-relation 271599. Up to 414305 conditions per place. [2023-08-03 21:12:59,226 INFO L140 encePairwiseOnDemand]: 568/576 looper letters, 68 selfloop transitions, 2 changer transitions 0/81 dead transitions. [2023-08-03 21:12:59,226 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 81 transitions, 350 flow [2023-08-03 21:12:59,227 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-03 21:12:59,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-03 21:12:59,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 841 transitions. [2023-08-03 21:12:59,230 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4866898148148148 [2023-08-03 21:12:59,230 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 841 transitions. [2023-08-03 21:12:59,230 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 841 transitions. [2023-08-03 21:12:59,230 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 21:12:59,230 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 841 transitions. [2023-08-03 21:12:59,232 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 280.3333333333333) internal successors, (841), 3 states have internal predecessors, (841), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 21:12:59,236 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 576.0) internal successors, (2304), 4 states have internal predecessors, (2304), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 21:12:59,237 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 576.0) internal successors, (2304), 4 states have internal predecessors, (2304), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 21:12:59,237 INFO L175 Difference]: Start difference. First operand has 72 places, 80 transitions, 208 flow. Second operand 3 states and 841 transitions. [2023-08-03 21:12:59,237 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 81 transitions, 350 flow [2023-08-03 21:12:59,249 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 73 places, 81 transitions, 350 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-03 21:12:59,250 INFO L231 Difference]: Finished difference. Result has 74 places, 76 transitions, 210 flow [2023-08-03 21:12:59,250 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=576, PETRI_DIFFERENCE_MINUEND_FLOW=198, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=75, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=210, PETRI_PLACES=74, PETRI_TRANSITIONS=76} [2023-08-03 21:12:59,251 INFO L281 CegarLoopForPetriNet]: 72 programPoint places, 2 predicate places. [2023-08-03 21:12:59,251 INFO L495 AbstractCegarLoop]: Abstraction has has 74 places, 76 transitions, 210 flow [2023-08-03 21:12:59,252 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 257.0) internal successors, (771), 3 states have internal predecessors, (771), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 21:12:59,252 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 21:12:59,252 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-03 21:12:59,252 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-08-03 21:12:59,252 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-03 21:12:59,253 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 21:12:59,253 INFO L85 PathProgramCache]: Analyzing trace with hash 430413332, now seen corresponding path program 1 times [2023-08-03 21:12:59,253 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 21:12:59,253 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [18835290] [2023-08-03 21:12:59,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 21:12:59,253 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 21:12:59,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 21:12:59,303 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-03 21:12:59,303 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 21:12:59,303 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [18835290] [2023-08-03 21:12:59,303 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [18835290] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-03 21:12:59,303 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [70944987] [2023-08-03 21:12:59,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 21:12:59,304 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 21:12:59,304 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-03 21:12:59,307 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) [2023-08-03 21:12:59,309 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-08-03 21:12:59,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 21:12:59,385 INFO L262 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-03 21:12:59,386 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-03 21:12:59,398 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-03 21:12:59,398 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-03 21:12:59,398 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [70944987] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-03 21:12:59,398 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-03 21:12:59,398 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2023-08-03 21:12:59,399 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1956253784] [2023-08-03 21:12:59,399 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-03 21:12:59,399 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-03 21:12:59,399 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 21:12:59,400 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-03 21:12:59,400 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-03 21:12:59,410 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 255 out of 576 [2023-08-03 21:12:59,411 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 76 transitions, 210 flow. Second operand has 3 states, 3 states have (on average 258.0) internal successors, (774), 3 states have internal predecessors, (774), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 21:12:59,411 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 21:12:59,411 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 255 of 576 [2023-08-03 21:12:59,411 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 21:13:23,543 INFO L124 PetriNetUnfolderBase]: 332980/417054 cut-off events. [2023-08-03 21:13:23,543 INFO L125 PetriNetUnfolderBase]: For 23378/23378 co-relation queries the response was YES. [2023-08-03 21:13:24,218 INFO L83 FinitePrefix]: Finished finitePrefix Result has 840683 conditions, 417054 events. 332980/417054 cut-off events. For 23378/23378 co-relation queries the response was YES. Maximal size of possible extension queue 8683. Compared 2513502 event pairs, 171213 based on Foata normal form. 0/273396 useless extension candidates. Maximal degree in co-relation 840637. Up to 410486 conditions per place. [2023-08-03 21:13:26,035 INFO L140 encePairwiseOnDemand]: 573/576 looper letters, 88 selfloop transitions, 2 changer transitions 0/101 dead transitions. [2023-08-03 21:13:26,036 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 101 transitions, 440 flow [2023-08-03 21:13:26,037 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-03 21:13:26,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-03 21:13:26,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 855 transitions. [2023-08-03 21:13:26,039 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4947916666666667 [2023-08-03 21:13:26,040 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 855 transitions. [2023-08-03 21:13:26,040 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 855 transitions. [2023-08-03 21:13:26,040 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 21:13:26,040 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 855 transitions. [2023-08-03 21:13:26,042 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 285.0) internal successors, (855), 3 states have internal predecessors, (855), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 21:13:26,045 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 576.0) internal successors, (2304), 4 states have internal predecessors, (2304), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 21:13:26,047 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 576.0) internal successors, (2304), 4 states have internal predecessors, (2304), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 21:13:26,047 INFO L175 Difference]: Start difference. First operand has 74 places, 76 transitions, 210 flow. Second operand 3 states and 855 transitions. [2023-08-03 21:13:26,047 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 101 transitions, 440 flow [2023-08-03 21:13:26,057 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 101 transitions, 438 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-03 21:13:26,059 INFO L231 Difference]: Finished difference. Result has 76 places, 77 transitions, 220 flow [2023-08-03 21:13:26,059 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=576, PETRI_DIFFERENCE_MINUEND_FLOW=208, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=76, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=74, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=220, PETRI_PLACES=76, PETRI_TRANSITIONS=77} [2023-08-03 21:13:26,059 INFO L281 CegarLoopForPetriNet]: 72 programPoint places, 4 predicate places. [2023-08-03 21:13:26,060 INFO L495 AbstractCegarLoop]: Abstraction has has 76 places, 77 transitions, 220 flow [2023-08-03 21:13:26,060 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 258.0) internal successors, (774), 3 states have internal predecessors, (774), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 21:13:26,060 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 21:13:26,060 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1] [2023-08-03 21:13:26,069 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-08-03 21:13:26,265 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 21:13:26,265 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-03 21:13:26,266 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 21:13:26,266 INFO L85 PathProgramCache]: Analyzing trace with hash 168513799, now seen corresponding path program 1 times [2023-08-03 21:13:26,266 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 21:13:26,266 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [658612843] [2023-08-03 21:13:26,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 21:13:26,266 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 21:13:26,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 21:13:26,354 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-08-03 21:13:26,354 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 21:13:26,354 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [658612843] [2023-08-03 21:13:26,354 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [658612843] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-03 21:13:26,355 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-03 21:13:26,355 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-03 21:13:26,355 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [762047096] [2023-08-03 21:13:26,355 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-03 21:13:26,355 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-03 21:13:26,355 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 21:13:26,356 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-03 21:13:26,356 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-03 21:13:26,371 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 255 out of 576 [2023-08-03 21:13:26,372 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 77 transitions, 220 flow. Second operand has 3 states, 3 states have (on average 257.0) internal successors, (771), 3 states have internal predecessors, (771), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 21:13:26,372 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 21:13:26,373 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 255 of 576 [2023-08-03 21:13:26,373 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 21:13:50,645 INFO L124 PetriNetUnfolderBase]: 334694/417623 cut-off events. [2023-08-03 21:13:50,645 INFO L125 PetriNetUnfolderBase]: For 40819/40819 co-relation queries the response was YES. [2023-08-03 21:13:51,387 INFO L83 FinitePrefix]: Finished finitePrefix Result has 858384 conditions, 417623 events. 334694/417623 cut-off events. For 40819/40819 co-relation queries the response was YES. Maximal size of possible extension queue 8648. Compared 2493144 event pairs, 238310 based on Foata normal form. 1/280974 useless extension candidates. Maximal degree in co-relation 277154. Up to 414267 conditions per place. [2023-08-03 21:13:53,380 INFO L140 encePairwiseOnDemand]: 573/576 looper letters, 65 selfloop transitions, 2 changer transitions 0/78 dead transitions. [2023-08-03 21:13:53,380 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 78 transitions, 356 flow [2023-08-03 21:13:53,381 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-03 21:13:53,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-03 21:13:53,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 831 transitions. [2023-08-03 21:13:53,385 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4809027777777778 [2023-08-03 21:13:53,385 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 831 transitions. [2023-08-03 21:13:53,385 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 831 transitions. [2023-08-03 21:13:53,386 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 21:13:53,386 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 831 transitions. [2023-08-03 21:13:53,414 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 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) [2023-08-03 21:13:53,419 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 576.0) internal successors, (2304), 4 states have internal predecessors, (2304), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 21:13:53,421 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 576.0) internal successors, (2304), 4 states have internal predecessors, (2304), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 21:13:53,421 INFO L175 Difference]: Start difference. First operand has 76 places, 77 transitions, 220 flow. Second operand 3 states and 831 transitions. [2023-08-03 21:13:53,421 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 78 transitions, 356 flow [2023-08-03 21:13:53,428 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 77 places, 78 transitions, 354 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-03 21:13:53,445 INFO L231 Difference]: Finished difference. Result has 78 places, 78 transitions, 230 flow [2023-08-03 21:13:53,445 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=576, PETRI_DIFFERENCE_MINUEND_FLOW=218, PETRI_DIFFERENCE_MINUEND_PLACES=75, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=77, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=75, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=230, PETRI_PLACES=78, PETRI_TRANSITIONS=78} [2023-08-03 21:13:53,450 INFO L281 CegarLoopForPetriNet]: 72 programPoint places, 6 predicate places. [2023-08-03 21:13:53,450 INFO L495 AbstractCegarLoop]: Abstraction has has 78 places, 78 transitions, 230 flow [2023-08-03 21:13:53,451 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 257.0) internal successors, (771), 3 states have internal predecessors, (771), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 21:13:53,451 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 21:13:53,451 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1] [2023-08-03 21:13:53,451 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-08-03 21:13:53,451 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-03 21:13:53,453 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 21:13:53,453 INFO L85 PathProgramCache]: Analyzing trace with hash 74675617, now seen corresponding path program 1 times [2023-08-03 21:13:53,453 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 21:13:53,453 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1656036657] [2023-08-03 21:13:53,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 21:13:53,454 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 21:13:53,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 21:13:53,561 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-03 21:13:53,561 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 21:13:53,561 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1656036657] [2023-08-03 21:13:53,562 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1656036657] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-03 21:13:53,562 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [491072778] [2023-08-03 21:13:53,562 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 21:13:53,562 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 21:13:53,562 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-03 21:13:53,564 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) [2023-08-03 21:13:53,627 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-08-03 21:13:53,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 21:13:53,699 INFO L262 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-03 21:13:53,699 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-03 21:13:53,760 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-03 21:13:53,761 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-03 21:13:53,761 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [491072778] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-03 21:13:53,762 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-03 21:13:53,762 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 6 [2023-08-03 21:13:53,762 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [992386985] [2023-08-03 21:13:53,762 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-03 21:13:53,762 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-03 21:13:53,763 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 21:13:53,763 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-03 21:13:53,764 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-08-03 21:13:53,794 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 254 out of 576 [2023-08-03 21:13:53,795 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 78 transitions, 230 flow. Second operand has 5 states, 5 states have (on average 256.0) internal successors, (1280), 5 states have internal predecessors, (1280), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 21:13:53,795 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 21:13:53,796 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 254 of 576 [2023-08-03 21:13:53,796 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 21:14:20,388 INFO L124 PetriNetUnfolderBase]: 334553/417419 cut-off events. [2023-08-03 21:14:20,389 INFO L125 PetriNetUnfolderBase]: For 40623/40623 co-relation queries the response was YES. [2023-08-03 21:14:21,174 INFO L83 FinitePrefix]: Finished finitePrefix Result has 857510 conditions, 417419 events. 334553/417419 cut-off events. For 40623/40623 co-relation queries the response was YES. Maximal size of possible extension queue 8648. Compared 2477604 event pairs, 143027 based on Foata normal form. 25/280866 useless extension candidates. Maximal degree in co-relation 857493. Up to 414000 conditions per place. [2023-08-03 21:14:22,674 INFO L140 encePairwiseOnDemand]: 572/576 looper letters, 77 selfloop transitions, 4 changer transitions 0/91 dead transitions. [2023-08-03 21:14:22,675 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 81 places, 91 transitions, 418 flow [2023-08-03 21:14:22,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-03 21:14:22,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-03 21:14:22,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1350 transitions. [2023-08-03 21:14:22,678 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46875 [2023-08-03 21:14:22,679 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1350 transitions. [2023-08-03 21:14:22,679 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1350 transitions. [2023-08-03 21:14:22,679 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 21:14:22,680 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1350 transitions. [2023-08-03 21:14:22,682 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 270.0) internal successors, (1350), 5 states have internal predecessors, (1350), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 21:14:22,687 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 576.0) internal successors, (3456), 6 states have internal predecessors, (3456), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 21:14:22,688 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 576.0) internal successors, (3456), 6 states have internal predecessors, (3456), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 21:14:22,688 INFO L175 Difference]: Start difference. First operand has 78 places, 78 transitions, 230 flow. Second operand 5 states and 1350 transitions. [2023-08-03 21:14:22,688 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 81 places, 91 transitions, 418 flow [2023-08-03 21:14:22,710 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 78 places, 91 transitions, 408 flow, removed 1 selfloop flow, removed 3 redundant places. [2023-08-03 21:14:22,711 INFO L231 Difference]: Finished difference. Result has 80 places, 78 transitions, 237 flow [2023-08-03 21:14:22,711 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=576, PETRI_DIFFERENCE_MINUEND_FLOW=214, PETRI_DIFFERENCE_MINUEND_PLACES=74, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=77, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=237, PETRI_PLACES=80, PETRI_TRANSITIONS=78} [2023-08-03 21:14:22,718 INFO L281 CegarLoopForPetriNet]: 72 programPoint places, 8 predicate places. [2023-08-03 21:14:22,718 INFO L495 AbstractCegarLoop]: Abstraction has has 80 places, 78 transitions, 237 flow [2023-08-03 21:14:22,719 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 256.0) internal successors, (1280), 5 states have internal predecessors, (1280), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 21:14:22,719 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 21:14:22,719 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-03 21:14:22,730 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-08-03 21:14:22,923 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,SelfDestructingSolverStorable6 [2023-08-03 21:14:22,924 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-03 21:14:22,924 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 21:14:22,924 INFO L85 PathProgramCache]: Analyzing trace with hash -522675288, now seen corresponding path program 1 times [2023-08-03 21:14:22,925 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 21:14:22,925 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1776558187] [2023-08-03 21:14:22,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 21:14:22,925 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 21:14:22,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 21:14:22,971 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-03 21:14:22,971 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 21:14:22,971 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1776558187] [2023-08-03 21:14:22,971 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1776558187] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-03 21:14:22,972 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1810818196] [2023-08-03 21:14:22,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 21:14:22,972 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 21:14:22,972 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-03 21:14:22,974 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) [2023-08-03 21:14:22,977 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-08-03 21:14:23,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 21:14:23,056 INFO L262 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-03 21:14:23,057 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-03 21:14:23,065 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-03 21:14:23,068 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-03 21:14:23,068 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1810818196] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-03 21:14:23,068 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-03 21:14:23,068 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2023-08-03 21:14:23,068 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1963119714] [2023-08-03 21:14:23,069 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-03 21:14:23,069 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-03 21:14:23,069 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 21:14:23,069 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-03 21:14:23,070 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-03 21:14:23,079 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 255 out of 576 [2023-08-03 21:14:23,080 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 80 places, 78 transitions, 237 flow. Second operand has 3 states, 3 states have (on average 259.3333333333333) internal successors, (778), 3 states have internal predecessors, (778), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 21:14:23,080 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 21:14:23,080 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 255 of 576 [2023-08-03 21:14:23,080 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 21:14:40,994 INFO L124 PetriNetUnfolderBase]: 245441/313059 cut-off events. [2023-08-03 21:14:40,994 INFO L125 PetriNetUnfolderBase]: For 22526/22526 co-relation queries the response was YES. [2023-08-03 21:14:41,547 INFO L83 FinitePrefix]: Finished finitePrefix Result has 642100 conditions, 313059 events. 245441/313059 cut-off events. For 22526/22526 co-relation queries the response was YES. Maximal size of possible extension queue 6732. Compared 1976868 event pairs, 117258 based on Foata normal form. 0/219432 useless extension candidates. Maximal degree in co-relation 642076. Up to 207130 conditions per place. [2023-08-03 21:14:42,516 INFO L140 encePairwiseOnDemand]: 573/576 looper letters, 109 selfloop transitions, 2 changer transitions 0/121 dead transitions. [2023-08-03 21:14:42,516 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 121 transitions, 555 flow [2023-08-03 21:14:42,517 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-03 21:14:42,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-03 21:14:42,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 873 transitions. [2023-08-03 21:14:42,519 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5052083333333334 [2023-08-03 21:14:42,519 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 873 transitions. [2023-08-03 21:14:42,519 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 873 transitions. [2023-08-03 21:14:42,519 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 21:14:42,519 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 873 transitions. [2023-08-03 21:14:42,521 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 291.0) internal successors, (873), 3 states have internal predecessors, (873), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 21:14:42,523 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 576.0) internal successors, (2304), 4 states have internal predecessors, (2304), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 21:14:42,524 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 576.0) internal successors, (2304), 4 states have internal predecessors, (2304), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 21:14:42,524 INFO L175 Difference]: Start difference. First operand has 80 places, 78 transitions, 237 flow. Second operand 3 states and 873 transitions. [2023-08-03 21:14:42,524 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 121 transitions, 555 flow [2023-08-03 21:14:42,531 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 80 places, 121 transitions, 548 flow, removed 2 selfloop flow, removed 2 redundant places. [2023-08-03 21:14:42,532 INFO L231 Difference]: Finished difference. Result has 81 places, 79 transitions, 242 flow [2023-08-03 21:14:42,532 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=576, PETRI_DIFFERENCE_MINUEND_FLOW=230, PETRI_DIFFERENCE_MINUEND_PLACES=78, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=78, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=76, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=242, PETRI_PLACES=81, PETRI_TRANSITIONS=79} [2023-08-03 21:14:42,533 INFO L281 CegarLoopForPetriNet]: 72 programPoint places, 9 predicate places. [2023-08-03 21:14:42,533 INFO L495 AbstractCegarLoop]: Abstraction has has 81 places, 79 transitions, 242 flow [2023-08-03 21:14:42,534 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 259.3333333333333) internal successors, (778), 3 states have internal predecessors, (778), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 21:14:42,534 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 21:14:42,534 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-03 21:14:42,538 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-08-03 21:14:42,738 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 21:14:42,738 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-03 21:14:42,739 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 21:14:42,739 INFO L85 PathProgramCache]: Analyzing trace with hash 272175640, now seen corresponding path program 1 times [2023-08-03 21:14:42,739 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 21:14:42,739 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [8514002] [2023-08-03 21:14:42,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 21:14:42,739 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 21:14:42,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 21:14:42,788 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-08-03 21:14:42,789 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 21:14:42,790 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [8514002] [2023-08-03 21:14:42,790 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [8514002] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-03 21:14:42,790 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1138148414] [2023-08-03 21:14:42,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 21:14:42,790 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 21:14:42,791 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-03 21:14:42,792 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) [2023-08-03 21:14:42,797 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-08-03 21:14:42,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 21:14:42,870 INFO L262 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-03 21:14:42,872 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-03 21:14:42,889 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-08-03 21:14:42,890 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-03 21:14:42,926 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-08-03 21:14:42,927 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1138148414] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-03 21:14:42,927 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-03 21:14:42,927 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 5 [2023-08-03 21:14:42,927 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [507710101] [2023-08-03 21:14:42,927 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-03 21:14:42,928 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-03 21:14:42,928 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 21:14:42,928 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-03 21:14:42,928 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-03 21:14:42,942 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 254 out of 576 [2023-08-03 21:14:42,943 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 81 places, 79 transitions, 242 flow. Second operand has 5 states, 5 states have (on average 257.0) internal successors, (1285), 5 states have internal predecessors, (1285), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 21:14:42,943 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 21:14:42,943 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 254 of 576 [2023-08-03 21:14:42,943 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 21:15:00,251 INFO L124 PetriNetUnfolderBase]: 224334/281812 cut-off events. [2023-08-03 21:15:00,252 INFO L125 PetriNetUnfolderBase]: For 62442/62442 co-relation queries the response was YES. [2023-08-03 21:15:00,779 INFO L83 FinitePrefix]: Finished finitePrefix Result has 597272 conditions, 281812 events. 224334/281812 cut-off events. For 62442/62442 co-relation queries the response was YES. Maximal size of possible extension queue 6124. Compared 1648489 event pairs, 96764 based on Foata normal form. 5/197722 useless extension candidates. Maximal degree in co-relation 597248. Up to 279771 conditions per place. [2023-08-03 21:15:01,627 INFO L140 encePairwiseOnDemand]: 573/576 looper letters, 78 selfloop transitions, 3 changer transitions 0/91 dead transitions. [2023-08-03 21:15:01,628 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 84 places, 91 transitions, 424 flow [2023-08-03 21:15:01,628 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-03 21:15:01,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-03 21:15:01,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1095 transitions. [2023-08-03 21:15:01,630 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4752604166666667 [2023-08-03 21:15:01,630 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1095 transitions. [2023-08-03 21:15:01,630 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1095 transitions. [2023-08-03 21:15:01,631 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 21:15:01,631 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1095 transitions. [2023-08-03 21:15:01,633 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 273.75) internal successors, (1095), 4 states have internal predecessors, (1095), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 21:15:01,635 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 576.0) internal successors, (2880), 5 states have internal predecessors, (2880), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 21:15:01,636 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 576.0) internal successors, (2880), 5 states have internal predecessors, (2880), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 21:15:01,636 INFO L175 Difference]: Start difference. First operand has 81 places, 79 transitions, 242 flow. Second operand 4 states and 1095 transitions. [2023-08-03 21:15:01,636 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 84 places, 91 transitions, 424 flow [2023-08-03 21:15:02,178 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 83 places, 91 transitions, 422 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-03 21:15:02,179 INFO L231 Difference]: Finished difference. Result has 83 places, 78 transitions, 238 flow [2023-08-03 21:15:02,180 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=576, PETRI_DIFFERENCE_MINUEND_FLOW=232, PETRI_DIFFERENCE_MINUEND_PLACES=80, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=78, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=75, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=238, PETRI_PLACES=83, PETRI_TRANSITIONS=78} [2023-08-03 21:15:02,180 INFO L281 CegarLoopForPetriNet]: 72 programPoint places, 11 predicate places. [2023-08-03 21:15:02,180 INFO L495 AbstractCegarLoop]: Abstraction has has 83 places, 78 transitions, 238 flow [2023-08-03 21:15:02,181 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 257.0) internal successors, (1285), 5 states have internal predecessors, (1285), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 21:15:02,181 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 21:15:02,181 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-03 21:15:02,185 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2023-08-03 21:15:02,382 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 21:15:02,382 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-03 21:15:02,382 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 21:15:02,382 INFO L85 PathProgramCache]: Analyzing trace with hash 279234734, now seen corresponding path program 1 times [2023-08-03 21:15:02,382 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 21:15:02,383 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [751489666] [2023-08-03 21:15:02,383 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 21:15:02,383 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 21:15:02,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 21:15:02,440 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-08-03 21:15:02,440 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 21:15:02,441 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [751489666] [2023-08-03 21:15:02,441 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [751489666] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-03 21:15:02,441 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [610527298] [2023-08-03 21:15:02,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 21:15:02,441 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 21:15:02,441 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-03 21:15:02,443 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) [2023-08-03 21:15:02,445 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-08-03 21:15:02,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 21:15:02,526 INFO L262 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-03 21:15:02,527 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-03 21:15:02,557 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-08-03 21:15:02,557 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-03 21:15:02,557 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [610527298] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-03 21:15:02,557 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-03 21:15:02,557 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 6 [2023-08-03 21:15:02,558 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1395905919] [2023-08-03 21:15:02,558 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-03 21:15:02,558 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-03 21:15:02,558 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 21:15:02,559 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-03 21:15:02,559 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-08-03 21:15:02,571 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 254 out of 576 [2023-08-03 21:15:02,572 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 83 places, 78 transitions, 238 flow. Second operand has 5 states, 5 states have (on average 257.0) internal successors, (1285), 5 states have internal predecessors, (1285), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 21:15:02,572 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 21:15:02,572 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 254 of 576 [2023-08-03 21:15:02,572 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 21:15:16,512 INFO L124 PetriNetUnfolderBase]: 194184/248638 cut-off events. [2023-08-03 21:15:16,512 INFO L125 PetriNetUnfolderBase]: For 16334/16334 co-relation queries the response was YES. [2023-08-03 21:15:17,014 INFO L83 FinitePrefix]: Finished finitePrefix Result has 523864 conditions, 248638 events. 194184/248638 cut-off events. For 16334/16334 co-relation queries the response was YES. Maximal size of possible extension queue 5493. Compared 1564858 event pairs, 3049 based on Foata normal form. 6000/181576 useless extension candidates. Maximal degree in co-relation 523839. Up to 210921 conditions per place. [2023-08-03 21:15:17,946 INFO L140 encePairwiseOnDemand]: 572/576 looper letters, 134 selfloop transitions, 4 changer transitions 0/147 dead transitions. [2023-08-03 21:15:17,946 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 86 places, 147 transitions, 652 flow [2023-08-03 21:15:17,946 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-03 21:15:17,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-03 21:15:17,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1406 transitions. [2023-08-03 21:15:17,949 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48819444444444443 [2023-08-03 21:15:17,949 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1406 transitions. [2023-08-03 21:15:17,949 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1406 transitions. [2023-08-03 21:15:17,950 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 21:15:17,950 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1406 transitions. [2023-08-03 21:15:17,952 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 281.2) internal successors, (1406), 5 states have internal predecessors, (1406), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 21:15:17,956 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 576.0) internal successors, (3456), 6 states have internal predecessors, (3456), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 21:15:17,956 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 576.0) internal successors, (3456), 6 states have internal predecessors, (3456), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 21:15:17,957 INFO L175 Difference]: Start difference. First operand has 83 places, 78 transitions, 238 flow. Second operand 5 states and 1406 transitions. [2023-08-03 21:15:17,957 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 86 places, 147 transitions, 652 flow [2023-08-03 21:15:24,709 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 81 places, 147 transitions, 640 flow, removed 0 selfloop flow, removed 5 redundant places. [2023-08-03 21:15:24,711 INFO L231 Difference]: Finished difference. Result has 83 places, 78 transitions, 243 flow [2023-08-03 21:15:24,711 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=576, PETRI_DIFFERENCE_MINUEND_FLOW=220, PETRI_DIFFERENCE_MINUEND_PLACES=77, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=77, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=243, PETRI_PLACES=83, PETRI_TRANSITIONS=78} [2023-08-03 21:15:24,711 INFO L281 CegarLoopForPetriNet]: 72 programPoint places, 11 predicate places. [2023-08-03 21:15:24,711 INFO L495 AbstractCegarLoop]: Abstraction has has 83 places, 78 transitions, 243 flow [2023-08-03 21:15:24,712 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 257.0) internal successors, (1285), 5 states have internal predecessors, (1285), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 21:15:24,712 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 21:15:24,712 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] [2023-08-03 21:15:24,718 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2023-08-03 21:15:24,918 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-08-03 21:15:24,918 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-03 21:15:24,919 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 21:15:24,919 INFO L85 PathProgramCache]: Analyzing trace with hash 1450886272, now seen corresponding path program 1 times [2023-08-03 21:15:24,919 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 21:15:24,919 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [509764202] [2023-08-03 21:15:24,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 21:15:24,919 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 21:15:24,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 21:15:24,964 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-08-03 21:15:24,964 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 21:15:24,964 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [509764202] [2023-08-03 21:15:24,964 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [509764202] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-03 21:15:24,964 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [493503337] [2023-08-03 21:15:24,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 21:15:24,964 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 21:15:24,965 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-03 21:15:24,966 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) [2023-08-03 21:15:24,972 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-08-03 21:15:25,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 21:15:25,049 INFO L262 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-03 21:15:25,051 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-03 21:15:25,060 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-08-03 21:15:25,060 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-03 21:15:25,062 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [493503337] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-03 21:15:25,062 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-03 21:15:25,062 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [4] total 5 [2023-08-03 21:15:25,064 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [438684775] [2023-08-03 21:15:25,064 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-03 21:15:25,065 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-03 21:15:25,065 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 21:15:25,066 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-03 21:15:25,066 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-03 21:15:25,075 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 255 out of 576 [2023-08-03 21:15:25,076 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 83 places, 78 transitions, 243 flow. Second operand has 3 states, 3 states have (on average 261.0) internal successors, (783), 3 states have internal predecessors, (783), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 21:15:25,076 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 21:15:25,076 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 255 of 576 [2023-08-03 21:15:25,077 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 21:15:39,068 INFO L124 PetriNetUnfolderBase]: 186658/236267 cut-off events. [2023-08-03 21:15:39,068 INFO L125 PetriNetUnfolderBase]: For 92139/92139 co-relation queries the response was YES. [2023-08-03 21:15:39,528 INFO L83 FinitePrefix]: Finished finitePrefix Result has 520757 conditions, 236267 events. 186658/236267 cut-off events. For 92139/92139 co-relation queries the response was YES. Maximal size of possible extension queue 5197. Compared 1401710 event pairs, 114521 based on Foata normal form. 0/168563 useless extension candidates. Maximal degree in co-relation 520732. Up to 198784 conditions per place. [2023-08-03 21:15:40,281 INFO L140 encePairwiseOnDemand]: 573/576 looper letters, 110 selfloop transitions, 2 changer transitions 0/121 dead transitions. [2023-08-03 21:15:40,281 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 85 places, 121 transitions, 561 flow [2023-08-03 21:15:40,282 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-03 21:15:40,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-03 21:15:40,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 873 transitions. [2023-08-03 21:15:40,284 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5052083333333334 [2023-08-03 21:15:40,284 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 873 transitions. [2023-08-03 21:15:40,284 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 873 transitions. [2023-08-03 21:15:40,284 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 21:15:40,284 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 873 transitions. [2023-08-03 21:15:40,286 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 291.0) internal successors, (873), 3 states have internal predecessors, (873), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 21:15:40,288 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 576.0) internal successors, (2304), 4 states have internal predecessors, (2304), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 21:15:40,288 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 576.0) internal successors, (2304), 4 states have internal predecessors, (2304), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 21:15:40,289 INFO L175 Difference]: Start difference. First operand has 83 places, 78 transitions, 243 flow. Second operand 3 states and 873 transitions. [2023-08-03 21:15:40,289 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 85 places, 121 transitions, 561 flow [2023-08-03 21:15:40,537 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 83 places, 121 transitions, 554 flow, removed 2 selfloop flow, removed 2 redundant places. [2023-08-03 21:15:40,538 INFO L231 Difference]: Finished difference. Result has 84 places, 79 transitions, 248 flow [2023-08-03 21:15:40,538 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=576, PETRI_DIFFERENCE_MINUEND_FLOW=236, PETRI_DIFFERENCE_MINUEND_PLACES=81, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=78, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=76, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=248, PETRI_PLACES=84, PETRI_TRANSITIONS=79} [2023-08-03 21:15:40,539 INFO L281 CegarLoopForPetriNet]: 72 programPoint places, 12 predicate places. [2023-08-03 21:15:40,539 INFO L495 AbstractCegarLoop]: Abstraction has has 84 places, 79 transitions, 248 flow [2023-08-03 21:15:40,539 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 261.0) internal successors, (783), 3 states have internal predecessors, (783), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 21:15:40,539 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 21:15:40,540 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-03 21:15:40,544 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2023-08-03 21:15:40,740 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 21:15:40,740 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-03 21:15:40,741 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 21:15:40,741 INFO L85 PathProgramCache]: Analyzing trace with hash 202423909, now seen corresponding path program 1 times [2023-08-03 21:15:40,741 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 21:15:40,741 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1315886787] [2023-08-03 21:15:40,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 21:15:40,741 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 21:15:40,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 21:15:40,787 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-08-03 21:15:40,788 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 21:15:40,788 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1315886787] [2023-08-03 21:15:40,788 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1315886787] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-03 21:15:40,788 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1668005239] [2023-08-03 21:15:40,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 21:15:40,788 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 21:15:40,788 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-03 21:15:40,790 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) [2023-08-03 21:15:40,813 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-08-03 21:15:40,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 21:15:40,877 INFO L262 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-03 21:15:40,880 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-03 21:15:40,898 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-08-03 21:15:40,898 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-03 21:15:40,916 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-08-03 21:15:40,916 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1668005239] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-03 21:15:40,916 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-03 21:15:40,916 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 5 [2023-08-03 21:15:40,917 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1592331057] [2023-08-03 21:15:40,917 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-03 21:15:40,918 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-03 21:15:40,919 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 21:15:40,919 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-03 21:15:40,919 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-03 21:15:40,931 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 254 out of 576 [2023-08-03 21:15:40,932 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 84 places, 79 transitions, 248 flow. Second operand has 5 states, 5 states have (on average 259.2) internal successors, (1296), 5 states have internal predecessors, (1296), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 21:15:40,932 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 21:15:40,932 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 254 of 576 [2023-08-03 21:15:40,932 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 21:15:55,232 INFO L124 PetriNetUnfolderBase]: 181640/233066 cut-off events. [2023-08-03 21:15:55,233 INFO L125 PetriNetUnfolderBase]: For 39292/39292 co-relation queries the response was YES. [2023-08-03 21:15:55,777 INFO L83 FinitePrefix]: Finished finitePrefix Result has 508699 conditions, 233066 events. 181640/233066 cut-off events. For 39292/39292 co-relation queries the response was YES. Maximal size of possible extension queue 5401. Compared 1434690 event pairs, 50268 based on Foata normal form. 400/168502 useless extension candidates. Maximal degree in co-relation 508673. Up to 195665 conditions per place. [2023-08-03 21:15:56,668 INFO L140 encePairwiseOnDemand]: 573/576 looper letters, 127 selfloop transitions, 3 changer transitions 0/139 dead transitions. [2023-08-03 21:15:56,668 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 87 places, 139 transitions, 624 flow [2023-08-03 21:15:56,668 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-03 21:15:56,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-03 21:15:56,670 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1143 transitions. [2023-08-03 21:15:56,670 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49609375 [2023-08-03 21:15:56,671 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1143 transitions. [2023-08-03 21:15:56,671 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1143 transitions. [2023-08-03 21:15:56,671 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 21:15:56,671 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1143 transitions. [2023-08-03 21:15:56,673 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) [2023-08-03 21:15:56,676 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 576.0) internal successors, (2880), 5 states have internal predecessors, (2880), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 21:15:56,676 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 576.0) internal successors, (2880), 5 states have internal predecessors, (2880), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 21:15:56,677 INFO L175 Difference]: Start difference. First operand has 84 places, 79 transitions, 248 flow. Second operand 4 states and 1143 transitions. [2023-08-03 21:15:56,677 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 87 places, 139 transitions, 624 flow [2023-08-03 21:16:11,927 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 86 places, 139 transitions, 622 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-03 21:16:11,928 INFO L231 Difference]: Finished difference. Result has 86 places, 78 transitions, 244 flow [2023-08-03 21:16:11,928 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=576, PETRI_DIFFERENCE_MINUEND_FLOW=238, PETRI_DIFFERENCE_MINUEND_PLACES=83, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=78, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=75, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=244, PETRI_PLACES=86, PETRI_TRANSITIONS=78} [2023-08-03 21:16:11,929 INFO L281 CegarLoopForPetriNet]: 72 programPoint places, 14 predicate places. [2023-08-03 21:16:11,929 INFO L495 AbstractCegarLoop]: Abstraction has has 86 places, 78 transitions, 244 flow [2023-08-03 21:16:11,930 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 259.2) internal successors, (1296), 5 states have internal predecessors, (1296), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 21:16:11,930 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 21:16:11,930 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-03 21:16:11,935 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2023-08-03 21:16:12,135 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 21:16:12,136 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-03 21:16:12,136 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 21:16:12,136 INFO L85 PathProgramCache]: Analyzing trace with hash -496089986, now seen corresponding path program 1 times [2023-08-03 21:16:12,136 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 21:16:12,136 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [797808610] [2023-08-03 21:16:12,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 21:16:12,136 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 21:16:12,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 21:16:12,200 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2023-08-03 21:16:12,200 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 21:16:12,200 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [797808610] [2023-08-03 21:16:12,200 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [797808610] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-03 21:16:12,200 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [298238007] [2023-08-03 21:16:12,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 21:16:12,200 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 21:16:12,201 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-03 21:16:12,202 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) [2023-08-03 21:16:12,205 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-08-03 21:16:12,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 21:16:12,300 INFO L262 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-03 21:16:12,301 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-03 21:16:12,312 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2023-08-03 21:16:12,313 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-03 21:16:12,330 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2023-08-03 21:16:12,331 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [298238007] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-03 21:16:12,331 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-03 21:16:12,331 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 5 [2023-08-03 21:16:12,331 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [393874142] [2023-08-03 21:16:12,331 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-03 21:16:12,333 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-03 21:16:12,333 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 21:16:12,334 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-03 21:16:12,334 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-03 21:16:12,345 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 254 out of 576 [2023-08-03 21:16:12,346 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 78 transitions, 244 flow. Second operand has 5 states, 5 states have (on average 259.4) internal successors, (1297), 5 states have internal predecessors, (1297), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 21:16:12,346 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 21:16:12,346 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 254 of 576 [2023-08-03 21:16:12,347 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand