./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/weaver/parallel-misc-2.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 3289d67d Calling Ultimate with: /root/.sdkman/candidates/java/11.0.12-open/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/weaver/parallel-misc-2.wvr.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash c558e00c0dd9b5f4cf40cba6e03e276a996696c71c282947f4c8d13390dc25bf --- Real Ultimate output --- This is Ultimate 0.2.5-tmp.fs.icfgbuilder-eval-3289d67-m [2024-11-16 19:27:03,739 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-16 19:27:03,795 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-11-16 19:27:03,801 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-16 19:27:03,803 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-16 19:27:03,825 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-16 19:27:03,827 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-16 19:27:03,827 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-16 19:27:03,828 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-16 19:27:03,829 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-16 19:27:03,829 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-16 19:27:03,829 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-16 19:27:03,830 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-16 19:27:03,831 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-16 19:27:03,832 INFO L153 SettingsManager]: * Use SBE=true [2024-11-16 19:27:03,832 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-16 19:27:03,832 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-11-16 19:27:03,832 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-16 19:27:03,832 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-16 19:27:03,833 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-16 19:27:03,833 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-16 19:27:03,835 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-11-16 19:27:03,835 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-16 19:27:03,835 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-11-16 19:27:03,835 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-16 19:27:03,835 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-16 19:27:03,836 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-11-16 19:27:03,836 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-16 19:27:03,836 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2024-11-16 19:27:03,836 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-16 19:27:03,836 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-16 19:27:03,836 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-16 19:27:03,837 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-16 19:27:03,837 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-16 19:27:03,837 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-16 19:27:03,837 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-11-16 19:27:03,837 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-16 19:27:03,837 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-16 19:27:03,838 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-16 19:27:03,838 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-16 19:27:03,838 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-16 19:27:03,838 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-16 19:27:03,838 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> c558e00c0dd9b5f4cf40cba6e03e276a996696c71c282947f4c8d13390dc25bf [2024-11-16 19:27:04,043 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-16 19:27:04,065 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-16 19:27:04,067 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-16 19:27:04,068 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-16 19:27:04,068 INFO L274 PluginConnector]: CDTParser initialized [2024-11-16 19:27:04,069 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/weaver/parallel-misc-2.wvr.c [2024-11-16 19:27:05,298 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-16 19:27:05,435 INFO L384 CDTParser]: Found 1 translation units. [2024-11-16 19:27:05,436 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/parallel-misc-2.wvr.c [2024-11-16 19:27:05,443 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/fc7d821b0/11a1c31bbd4245f194f2bebabb40d097/FLAG7d233fed1 [2024-11-16 19:27:05,453 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/fc7d821b0/11a1c31bbd4245f194f2bebabb40d097 [2024-11-16 19:27:05,455 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-16 19:27:05,456 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-16 19:27:05,457 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-16 19:27:05,457 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-16 19:27:05,461 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-16 19:27:05,461 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.11 07:27:05" (1/1) ... [2024-11-16 19:27:05,462 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6a300dfc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:27:05, skipping insertion in model container [2024-11-16 19:27:05,462 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.11 07:27:05" (1/1) ... [2024-11-16 19:27:05,476 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-16 19:27:05,623 WARN L250 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/parallel-misc-2.wvr.c[2249,2262] [2024-11-16 19:27:05,627 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-16 19:27:05,633 INFO L200 MainTranslator]: Completed pre-run [2024-11-16 19:27:05,655 WARN L250 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/parallel-misc-2.wvr.c[2249,2262] [2024-11-16 19:27:05,656 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-16 19:27:05,670 INFO L204 MainTranslator]: Completed translation [2024-11-16 19:27:05,671 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:27:05 WrapperNode [2024-11-16 19:27:05,671 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-16 19:27:05,672 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-16 19:27:05,673 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-16 19:27:05,673 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-16 19:27:05,678 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:27:05" (1/1) ... [2024-11-16 19:27:05,683 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:27:05" (1/1) ... [2024-11-16 19:27:05,695 INFO L138 Inliner]: procedures = 18, calls = 10, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 62 [2024-11-16 19:27:05,695 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-16 19:27:05,696 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-16 19:27:05,696 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-16 19:27:05,696 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-16 19:27:05,704 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:27:05" (1/1) ... [2024-11-16 19:27:05,704 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:27:05" (1/1) ... [2024-11-16 19:27:05,705 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:27:05" (1/1) ... [2024-11-16 19:27:05,714 INFO L175 MemorySlicer]: Split 2 memory accesses to 1 slices as follows [2]. 100 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2]. The 0 writes are split as follows [0]. [2024-11-16 19:27:05,715 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:27:05" (1/1) ... [2024-11-16 19:27:05,715 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:27:05" (1/1) ... [2024-11-16 19:27:05,718 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:27:05" (1/1) ... [2024-11-16 19:27:05,724 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:27:05" (1/1) ... [2024-11-16 19:27:05,726 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:27:05" (1/1) ... [2024-11-16 19:27:05,726 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:27:05" (1/1) ... [2024-11-16 19:27:05,727 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-16 19:27:05,728 INFO L112 PluginConnector]: ------------------------IcfgBuilder---------------------------- [2024-11-16 19:27:05,728 INFO L270 PluginConnector]: Initializing IcfgBuilder... [2024-11-16 19:27:05,728 INFO L274 PluginConnector]: IcfgBuilder initialized [2024-11-16 19:27:05,729 INFO L184 PluginConnector]: Executing the observer IcfgBuilderObserver from plugin IcfgBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:27:05" (1/1) ... [2024-11-16 19:27:05,735 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-16 19:27:05,743 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-16 19:27:05,758 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-11-16 19:27:05,767 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-11-16 19:27:05,801 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-16 19:27:05,801 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2024-11-16 19:27:05,802 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2024-11-16 19:27:05,802 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2024-11-16 19:27:05,802 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2024-11-16 19:27:05,802 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-11-16 19:27:05,803 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-16 19:27:05,803 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-16 19:27:05,805 WARN L225 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2024-11-16 19:27:05,883 INFO L256 CfgBuilder]: Building ICFG [2024-11-16 19:27:05,886 INFO L286 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-16 19:27:06,061 INFO L303 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2024-11-16 19:27:06,062 INFO L307 CfgBuilder]: Performing block encoding [2024-11-16 19:27:06,223 INFO L331 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-16 19:27:06,224 INFO L336 CfgBuilder]: Removed 0 assume(true) statements. [2024-11-16 19:27:06,224 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 16.11 07:27:06 BoogieIcfgContainer [2024-11-16 19:27:06,224 INFO L131 PluginConnector]: ------------------------ END IcfgBuilder---------------------------- [2024-11-16 19:27:06,226 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-16 19:27:06,226 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-16 19:27:06,229 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-16 19:27:06,229 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 16.11 07:27:05" (1/3) ... [2024-11-16 19:27:06,230 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1295899a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.11 07:27:06, skipping insertion in model container [2024-11-16 19:27:06,230 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:27:05" (2/3) ... [2024-11-16 19:27:06,231 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1295899a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.11 07:27:06, skipping insertion in model container [2024-11-16 19:27:06,231 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 16.11 07:27:06" (3/3) ... [2024-11-16 19:27:06,232 INFO L112 eAbstractionObserver]: Analyzing ICFG parallel-misc-2.wvr.c [2024-11-16 19:27:06,248 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-16 19:27:06,249 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-11-16 19:27:06,249 INFO L489 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-11-16 19:27:06,289 INFO L143 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2024-11-16 19:27:06,316 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 39 places, 38 transitions, 90 flow [2024-11-16 19:27:06,339 INFO L124 PetriNetUnfolderBase]: 6/36 cut-off events. [2024-11-16 19:27:06,339 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-11-16 19:27:06,342 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45 conditions, 36 events. 6/36 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 67 event pairs, 0 based on Foata normal form. 0/29 useless extension candidates. Maximal degree in co-relation 29. Up to 2 conditions per place. [2024-11-16 19:27:06,342 INFO L82 GeneralOperation]: Start removeDead. Operand has 39 places, 38 transitions, 90 flow [2024-11-16 19:27:06,344 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 36 places, 35 transitions, 82 flow [2024-11-16 19:27:06,350 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-16 19:27:06,355 INFO L333 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, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopHeads, 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;@7ce7aed, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-16 19:27:06,355 INFO L334 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2024-11-16 19:27:06,369 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-11-16 19:27:06,370 INFO L124 PetriNetUnfolderBase]: 6/34 cut-off events. [2024-11-16 19:27:06,370 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-11-16 19:27:06,370 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-16 19:27:06,371 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-16 19:27:06,371 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-16 19:27:06,375 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-16 19:27:06,376 INFO L85 PathProgramCache]: Analyzing trace with hash -612727728, now seen corresponding path program 1 times [2024-11-16 19:27:06,383 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-16 19:27:06,384 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1413811733] [2024-11-16 19:27:06,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 19:27:06,384 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-16 19:27:06,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 19:27:06,538 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-16 19:27:06,541 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-16 19:27:06,541 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1413811733] [2024-11-16 19:27:06,541 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1413811733] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-16 19:27:06,542 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-16 19:27:06,542 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-16 19:27:06,543 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [209187158] [2024-11-16 19:27:06,545 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-16 19:27:06,551 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2024-11-16 19:27:06,556 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-16 19:27:06,584 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2024-11-16 19:27:06,585 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-11-16 19:27:06,586 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 38 [2024-11-16 19:27:06,589 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 36 places, 35 transitions, 82 flow. Second operand has 2 states, 2 states have (on average 24.0) internal successors, (48), 2 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-16 19:27:06,589 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-16 19:27:06,589 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 38 [2024-11-16 19:27:06,590 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-16 19:27:06,672 INFO L124 PetriNetUnfolderBase]: 110/266 cut-off events. [2024-11-16 19:27:06,674 INFO L125 PetriNetUnfolderBase]: For 8/8 co-relation queries the response was YES. [2024-11-16 19:27:06,675 INFO L83 FinitePrefix]: Finished finitePrefix Result has 450 conditions, 266 events. 110/266 cut-off events. For 8/8 co-relation queries the response was YES. Maximal size of possible extension queue 30. Compared 1226 event pairs, 45 based on Foata normal form. 36/229 useless extension candidates. Maximal degree in co-relation 399. Up to 164 conditions per place. [2024-11-16 19:27:06,678 INFO L140 encePairwiseOnDemand]: 36/38 looper letters, 18 selfloop transitions, 0 changer transitions 0/33 dead transitions. [2024-11-16 19:27:06,680 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 37 places, 33 transitions, 114 flow [2024-11-16 19:27:06,681 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2024-11-16 19:27:06,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2024-11-16 19:27:06,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 54 transitions. [2024-11-16 19:27:06,690 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.7105263157894737 [2024-11-16 19:27:06,691 INFO L175 Difference]: Start difference. First operand has 36 places, 35 transitions, 82 flow. Second operand 2 states and 54 transitions. [2024-11-16 19:27:06,692 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 37 places, 33 transitions, 114 flow [2024-11-16 19:27:06,693 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 33 places, 33 transitions, 106 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-11-16 19:27:06,695 INFO L231 Difference]: Finished difference. Result has 33 places, 33 transitions, 70 flow [2024-11-16 19:27:06,696 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=38, PETRI_DIFFERENCE_MINUEND_FLOW=70, PETRI_DIFFERENCE_MINUEND_PLACES=32, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=70, PETRI_PLACES=33, PETRI_TRANSITIONS=33} [2024-11-16 19:27:06,699 INFO L277 CegarLoopForPetriNet]: 36 programPoint places, -3 predicate places. [2024-11-16 19:27:06,701 INFO L471 AbstractCegarLoop]: Abstraction has has 33 places, 33 transitions, 70 flow [2024-11-16 19:27:06,701 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 24.0) internal successors, (48), 2 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-16 19:27:06,702 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-16 19:27:06,702 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-16 19:27:06,702 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-16 19:27:06,703 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-16 19:27:06,703 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-16 19:27:06,704 INFO L85 PathProgramCache]: Analyzing trace with hash -2130749885, now seen corresponding path program 1 times [2024-11-16 19:27:06,704 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-16 19:27:06,704 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [724161133] [2024-11-16 19:27:06,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 19:27:06,705 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-16 19:27:06,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 19:27:06,860 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-16 19:27:06,860 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-16 19:27:06,861 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [724161133] [2024-11-16 19:27:06,861 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [724161133] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-16 19:27:06,861 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-16 19:27:06,862 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-16 19:27:06,862 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1433666797] [2024-11-16 19:27:06,862 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-16 19:27:06,863 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-16 19:27:06,864 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-16 19:27:06,864 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-16 19:27:06,865 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-16 19:27:06,865 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 38 [2024-11-16 19:27:06,865 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 33 places, 33 transitions, 70 flow. Second operand has 3 states, 3 states have (on average 21.0) internal successors, (63), 3 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-16 19:27:06,865 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-16 19:27:06,866 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 38 [2024-11-16 19:27:06,866 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-16 19:27:06,956 INFO L124 PetriNetUnfolderBase]: 146/326 cut-off events. [2024-11-16 19:27:06,957 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2024-11-16 19:27:06,958 INFO L83 FinitePrefix]: Finished finitePrefix Result has 546 conditions, 326 events. 146/326 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 36. Compared 1473 event pairs, 12 based on Foata normal form. 1/270 useless extension candidates. Maximal degree in co-relation 543. Up to 186 conditions per place. [2024-11-16 19:27:06,961 INFO L140 encePairwiseOnDemand]: 30/38 looper letters, 21 selfloop transitions, 7 changer transitions 1/44 dead transitions. [2024-11-16 19:27:06,961 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 35 places, 44 transitions, 153 flow [2024-11-16 19:27:06,962 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-16 19:27:06,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-16 19:27:06,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 81 transitions. [2024-11-16 19:27:06,963 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.7105263157894737 [2024-11-16 19:27:06,963 INFO L175 Difference]: Start difference. First operand has 33 places, 33 transitions, 70 flow. Second operand 3 states and 81 transitions. [2024-11-16 19:27:06,963 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 35 places, 44 transitions, 153 flow [2024-11-16 19:27:06,964 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 35 places, 44 transitions, 153 flow, removed 0 selfloop flow, removed 0 redundant places. [2024-11-16 19:27:06,965 INFO L231 Difference]: Finished difference. Result has 36 places, 37 transitions, 109 flow [2024-11-16 19:27:06,966 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=38, PETRI_DIFFERENCE_MINUEND_FLOW=70, PETRI_DIFFERENCE_MINUEND_PLACES=33, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=109, PETRI_PLACES=36, PETRI_TRANSITIONS=37} [2024-11-16 19:27:06,966 INFO L277 CegarLoopForPetriNet]: 36 programPoint places, 0 predicate places. [2024-11-16 19:27:06,966 INFO L471 AbstractCegarLoop]: Abstraction has has 36 places, 37 transitions, 109 flow [2024-11-16 19:27:06,967 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 21.0) internal successors, (63), 3 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-16 19:27:06,967 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-16 19:27:06,967 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-16 19:27:06,967 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-16 19:27:06,967 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-16 19:27:06,967 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-16 19:27:06,968 INFO L85 PathProgramCache]: Analyzing trace with hash -1828935182, now seen corresponding path program 1 times [2024-11-16 19:27:06,968 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-16 19:27:06,968 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [338335671] [2024-11-16 19:27:06,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 19:27:06,968 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-16 19:27:06,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 19:27:07,077 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-16 19:27:07,077 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-16 19:27:07,078 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [338335671] [2024-11-16 19:27:07,078 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [338335671] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-16 19:27:07,078 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-16 19:27:07,078 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-16 19:27:07,079 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1629961665] [2024-11-16 19:27:07,079 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-16 19:27:07,079 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-16 19:27:07,080 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-16 19:27:07,080 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-16 19:27:07,080 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-16 19:27:07,089 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 38 [2024-11-16 19:27:07,090 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 36 places, 37 transitions, 109 flow. Second operand has 4 states, 4 states have (on average 17.25) internal successors, (69), 4 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-16 19:27:07,090 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-16 19:27:07,090 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 38 [2024-11-16 19:27:07,090 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-16 19:27:07,251 INFO L124 PetriNetUnfolderBase]: 308/586 cut-off events. [2024-11-16 19:27:07,252 INFO L125 PetriNetUnfolderBase]: For 117/117 co-relation queries the response was YES. [2024-11-16 19:27:07,254 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1253 conditions, 586 events. 308/586 cut-off events. For 117/117 co-relation queries the response was YES. Maximal size of possible extension queue 49. Compared 2995 event pairs, 31 based on Foata normal form. 0/474 useless extension candidates. Maximal degree in co-relation 1248. Up to 210 conditions per place. [2024-11-16 19:27:07,257 INFO L140 encePairwiseOnDemand]: 30/38 looper letters, 50 selfloop transitions, 10 changer transitions 5/76 dead transitions. [2024-11-16 19:27:07,257 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 40 places, 76 transitions, 350 flow [2024-11-16 19:27:07,260 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-16 19:27:07,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-16 19:27:07,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 125 transitions. [2024-11-16 19:27:07,261 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6578947368421053 [2024-11-16 19:27:07,262 INFO L175 Difference]: Start difference. First operand has 36 places, 37 transitions, 109 flow. Second operand 5 states and 125 transitions. [2024-11-16 19:27:07,262 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 40 places, 76 transitions, 350 flow [2024-11-16 19:27:07,263 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 39 places, 76 transitions, 339 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-16 19:27:07,264 INFO L231 Difference]: Finished difference. Result has 42 places, 44 transitions, 163 flow [2024-11-16 19:27:07,264 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=38, PETRI_DIFFERENCE_MINUEND_FLOW=102, PETRI_DIFFERENCE_MINUEND_PLACES=35, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=163, PETRI_PLACES=42, PETRI_TRANSITIONS=44} [2024-11-16 19:27:07,269 INFO L277 CegarLoopForPetriNet]: 36 programPoint places, 6 predicate places. [2024-11-16 19:27:07,269 INFO L471 AbstractCegarLoop]: Abstraction has has 42 places, 44 transitions, 163 flow [2024-11-16 19:27:07,269 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 17.25) internal successors, (69), 4 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-16 19:27:07,272 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-16 19:27:07,272 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-16 19:27:07,272 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-11-16 19:27:07,273 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-16 19:27:07,273 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-16 19:27:07,273 INFO L85 PathProgramCache]: Analyzing trace with hash -986808580, now seen corresponding path program 2 times [2024-11-16 19:27:07,273 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-16 19:27:07,273 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1663753238] [2024-11-16 19:27:07,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 19:27:07,274 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-16 19:27:07,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 19:27:07,418 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-16 19:27:07,423 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-16 19:27:07,436 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1663753238] [2024-11-16 19:27:07,436 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1663753238] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-16 19:27:07,437 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-16 19:27:07,437 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-16 19:27:07,437 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [140310914] [2024-11-16 19:27:07,438 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-16 19:27:07,438 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-16 19:27:07,438 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-16 19:27:07,439 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-16 19:27:07,439 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-16 19:27:07,448 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 38 [2024-11-16 19:27:07,448 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 44 transitions, 163 flow. Second operand has 4 states, 4 states have (on average 17.25) internal successors, (69), 4 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-16 19:27:07,448 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-16 19:27:07,448 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 38 [2024-11-16 19:27:07,449 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-16 19:27:07,604 INFO L124 PetriNetUnfolderBase]: 297/608 cut-off events. [2024-11-16 19:27:07,604 INFO L125 PetriNetUnfolderBase]: For 408/408 co-relation queries the response was YES. [2024-11-16 19:27:07,606 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1461 conditions, 608 events. 297/608 cut-off events. For 408/408 co-relation queries the response was YES. Maximal size of possible extension queue 46. Compared 3161 event pairs, 28 based on Foata normal form. 14/582 useless extension candidates. Maximal degree in co-relation 1453. Up to 149 conditions per place. [2024-11-16 19:27:07,609 INFO L140 encePairwiseOnDemand]: 31/38 looper letters, 49 selfloop transitions, 12 changer transitions 5/77 dead transitions. [2024-11-16 19:27:07,609 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 77 transitions, 410 flow [2024-11-16 19:27:07,609 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-16 19:27:07,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-16 19:27:07,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 123 transitions. [2024-11-16 19:27:07,611 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6473684210526316 [2024-11-16 19:27:07,611 INFO L175 Difference]: Start difference. First operand has 42 places, 44 transitions, 163 flow. Second operand 5 states and 123 transitions. [2024-11-16 19:27:07,612 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 77 transitions, 410 flow [2024-11-16 19:27:07,616 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 77 transitions, 410 flow, removed 0 selfloop flow, removed 0 redundant places. [2024-11-16 19:27:07,617 INFO L231 Difference]: Finished difference. Result has 50 places, 49 transitions, 249 flow [2024-11-16 19:27:07,617 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=38, PETRI_DIFFERENCE_MINUEND_FLOW=158, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=249, PETRI_PLACES=50, PETRI_TRANSITIONS=49} [2024-11-16 19:27:07,618 INFO L277 CegarLoopForPetriNet]: 36 programPoint places, 14 predicate places. [2024-11-16 19:27:07,618 INFO L471 AbstractCegarLoop]: Abstraction has has 50 places, 49 transitions, 249 flow [2024-11-16 19:27:07,618 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 17.25) internal successors, (69), 4 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-16 19:27:07,618 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-16 19:27:07,618 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-16 19:27:07,618 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-11-16 19:27:07,618 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-16 19:27:07,619 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-16 19:27:07,619 INFO L85 PathProgramCache]: Analyzing trace with hash 1302020225, now seen corresponding path program 1 times [2024-11-16 19:27:07,619 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-16 19:27:07,621 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1862818979] [2024-11-16 19:27:07,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 19:27:07,622 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-16 19:27:07,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 19:27:07,707 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-16 19:27:07,707 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-16 19:27:07,707 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1862818979] [2024-11-16 19:27:07,708 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1862818979] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-16 19:27:07,708 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-16 19:27:07,708 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-16 19:27:07,708 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [585660925] [2024-11-16 19:27:07,709 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-16 19:27:07,709 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-16 19:27:07,709 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-16 19:27:07,709 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-16 19:27:07,709 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-16 19:27:07,716 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 38 [2024-11-16 19:27:07,717 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 49 transitions, 249 flow. Second operand has 4 states, 4 states have (on average 17.25) internal successors, (69), 4 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-16 19:27:07,717 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-16 19:27:07,718 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 38 [2024-11-16 19:27:07,718 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-16 19:27:07,831 INFO L124 PetriNetUnfolderBase]: 303/601 cut-off events. [2024-11-16 19:27:07,831 INFO L125 PetriNetUnfolderBase]: For 1082/1082 co-relation queries the response was YES. [2024-11-16 19:27:07,833 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1747 conditions, 601 events. 303/601 cut-off events. For 1082/1082 co-relation queries the response was YES. Maximal size of possible extension queue 52. Compared 3183 event pairs, 35 based on Foata normal form. 4/558 useless extension candidates. Maximal degree in co-relation 1735. Up to 248 conditions per place. [2024-11-16 19:27:07,835 INFO L140 encePairwiseOnDemand]: 30/38 looper letters, 57 selfloop transitions, 9 changer transitions 2/79 dead transitions. [2024-11-16 19:27:07,835 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 79 transitions, 506 flow [2024-11-16 19:27:07,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-16 19:27:07,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-16 19:27:07,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 121 transitions. [2024-11-16 19:27:07,836 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6368421052631579 [2024-11-16 19:27:07,836 INFO L175 Difference]: Start difference. First operand has 50 places, 49 transitions, 249 flow. Second operand 5 states and 121 transitions. [2024-11-16 19:27:07,836 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 79 transitions, 506 flow [2024-11-16 19:27:07,840 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 79 transitions, 502 flow, removed 2 selfloop flow, removed 0 redundant places. [2024-11-16 19:27:07,841 INFO L231 Difference]: Finished difference. Result has 56 places, 52 transitions, 300 flow [2024-11-16 19:27:07,843 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=38, PETRI_DIFFERENCE_MINUEND_FLOW=245, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=300, PETRI_PLACES=56, PETRI_TRANSITIONS=52} [2024-11-16 19:27:07,844 INFO L277 CegarLoopForPetriNet]: 36 programPoint places, 20 predicate places. [2024-11-16 19:27:07,845 INFO L471 AbstractCegarLoop]: Abstraction has has 56 places, 52 transitions, 300 flow [2024-11-16 19:27:07,845 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 17.25) internal successors, (69), 4 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-16 19:27:07,845 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-16 19:27:07,845 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-16 19:27:07,845 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-11-16 19:27:07,845 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-16 19:27:07,846 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-16 19:27:07,846 INFO L85 PathProgramCache]: Analyzing trace with hash -1037622871, now seen corresponding path program 2 times [2024-11-16 19:27:07,846 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-16 19:27:07,846 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [631973627] [2024-11-16 19:27:07,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 19:27:07,848 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-16 19:27:07,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 19:27:07,918 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-16 19:27:07,918 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-16 19:27:07,918 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [631973627] [2024-11-16 19:27:07,919 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [631973627] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-16 19:27:07,919 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-16 19:27:07,919 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-16 19:27:07,919 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1834102775] [2024-11-16 19:27:07,919 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-16 19:27:07,920 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-16 19:27:07,922 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-16 19:27:07,922 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-16 19:27:07,922 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-16 19:27:07,932 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 38 [2024-11-16 19:27:07,932 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 52 transitions, 300 flow. Second operand has 4 states, 4 states have (on average 17.25) internal successors, (69), 4 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-16 19:27:07,933 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-16 19:27:07,933 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 38 [2024-11-16 19:27:07,933 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-16 19:27:08,040 INFO L124 PetriNetUnfolderBase]: 281/592 cut-off events. [2024-11-16 19:27:08,041 INFO L125 PetriNetUnfolderBase]: For 1382/1382 co-relation queries the response was YES. [2024-11-16 19:27:08,042 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1746 conditions, 592 events. 281/592 cut-off events. For 1382/1382 co-relation queries the response was YES. Maximal size of possible extension queue 40. Compared 2840 event pairs, 29 based on Foata normal form. 19/567 useless extension candidates. Maximal degree in co-relation 1731. Up to 180 conditions per place. [2024-11-16 19:27:08,045 INFO L140 encePairwiseOnDemand]: 31/38 looper letters, 54 selfloop transitions, 12 changer transitions 2/79 dead transitions. [2024-11-16 19:27:08,045 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 79 transitions, 558 flow [2024-11-16 19:27:08,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-16 19:27:08,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-16 19:27:08,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 118 transitions. [2024-11-16 19:27:08,046 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6210526315789474 [2024-11-16 19:27:08,046 INFO L175 Difference]: Start difference. First operand has 56 places, 52 transitions, 300 flow. Second operand 5 states and 118 transitions. [2024-11-16 19:27:08,046 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 79 transitions, 558 flow [2024-11-16 19:27:08,050 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 79 transitions, 542 flow, removed 6 selfloop flow, removed 1 redundant places. [2024-11-16 19:27:08,051 INFO L231 Difference]: Finished difference. Result has 62 places, 55 transitions, 363 flow [2024-11-16 19:27:08,051 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=38, PETRI_DIFFERENCE_MINUEND_FLOW=275, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=363, PETRI_PLACES=62, PETRI_TRANSITIONS=55} [2024-11-16 19:27:08,053 INFO L277 CegarLoopForPetriNet]: 36 programPoint places, 26 predicate places. [2024-11-16 19:27:08,053 INFO L471 AbstractCegarLoop]: Abstraction has has 62 places, 55 transitions, 363 flow [2024-11-16 19:27:08,053 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 17.25) internal successors, (69), 4 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-16 19:27:08,053 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-16 19:27:08,054 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-16 19:27:08,054 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-11-16 19:27:08,054 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-16 19:27:08,054 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-16 19:27:08,054 INFO L85 PathProgramCache]: Analyzing trace with hash -298378052, now seen corresponding path program 1 times [2024-11-16 19:27:08,054 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-16 19:27:08,054 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2107676944] [2024-11-16 19:27:08,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 19:27:08,054 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-16 19:27:08,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 19:27:08,253 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-16 19:27:08,253 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-16 19:27:08,254 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2107676944] [2024-11-16 19:27:08,254 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2107676944] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-16 19:27:08,254 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1236336090] [2024-11-16 19:27:08,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 19:27:08,256 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-16 19:27:08,256 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-16 19:27:08,258 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) [2024-11-16 19:27:08,259 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-16 19:27:08,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 19:27:08,316 INFO L255 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 5 conjuncts are in the unsatisfiable core [2024-11-16 19:27:08,319 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-16 19:27:08,480 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-16 19:27:08,481 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-16 19:27:08,650 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-16 19:27:08,651 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1236336090] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-16 19:27:08,651 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-16 19:27:08,651 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 11 [2024-11-16 19:27:08,652 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2146388806] [2024-11-16 19:27:08,652 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-16 19:27:08,652 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-11-16 19:27:08,653 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-16 19:27:08,653 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-11-16 19:27:08,653 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2024-11-16 19:27:08,676 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 38 [2024-11-16 19:27:08,676 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 55 transitions, 363 flow. Second operand has 11 states, 11 states have (on average 17.636363636363637) internal successors, (194), 11 states have internal predecessors, (194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-16 19:27:08,676 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-16 19:27:08,676 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 38 [2024-11-16 19:27:08,676 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-16 19:27:08,941 INFO L124 PetriNetUnfolderBase]: 631/1318 cut-off events. [2024-11-16 19:27:08,942 INFO L125 PetriNetUnfolderBase]: For 4649/4649 co-relation queries the response was YES. [2024-11-16 19:27:08,944 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4128 conditions, 1318 events. 631/1318 cut-off events. For 4649/4649 co-relation queries the response was YES. Maximal size of possible extension queue 48. Compared 6898 event pairs, 54 based on Foata normal form. 28/1258 useless extension candidates. Maximal degree in co-relation 4110. Up to 282 conditions per place. [2024-11-16 19:27:08,949 INFO L140 encePairwiseOnDemand]: 27/38 looper letters, 100 selfloop transitions, 26 changer transitions 0/139 dead transitions. [2024-11-16 19:27:08,949 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 139 transitions, 1134 flow [2024-11-16 19:27:08,949 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-16 19:27:08,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-11-16 19:27:08,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 235 transitions. [2024-11-16 19:27:08,950 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.618421052631579 [2024-11-16 19:27:08,951 INFO L175 Difference]: Start difference. First operand has 62 places, 55 transitions, 363 flow. Second operand 10 states and 235 transitions. [2024-11-16 19:27:08,951 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 139 transitions, 1134 flow [2024-11-16 19:27:08,954 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 139 transitions, 1107 flow, removed 12 selfloop flow, removed 1 redundant places. [2024-11-16 19:27:08,956 INFO L231 Difference]: Finished difference. Result has 74 places, 67 transitions, 556 flow [2024-11-16 19:27:08,956 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=38, PETRI_DIFFERENCE_MINUEND_FLOW=352, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=55, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=556, PETRI_PLACES=74, PETRI_TRANSITIONS=67} [2024-11-16 19:27:08,956 INFO L277 CegarLoopForPetriNet]: 36 programPoint places, 38 predicate places. [2024-11-16 19:27:08,956 INFO L471 AbstractCegarLoop]: Abstraction has has 74 places, 67 transitions, 556 flow [2024-11-16 19:27:08,957 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 17.636363636363637) internal successors, (194), 11 states have internal predecessors, (194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-16 19:27:08,957 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-16 19:27:08,957 INFO L204 CegarLoopForPetriNet]: trace histogram [3, 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] [2024-11-16 19:27:08,971 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-11-16 19:27:09,157 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-16 19:27:09,158 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-16 19:27:09,158 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-16 19:27:09,158 INFO L85 PathProgramCache]: Analyzing trace with hash 887096580, now seen corresponding path program 2 times [2024-11-16 19:27:09,159 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-16 19:27:09,159 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [307030123] [2024-11-16 19:27:09,159 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 19:27:09,159 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-16 19:27:09,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 19:27:09,250 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-16 19:27:09,251 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-16 19:27:09,251 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [307030123] [2024-11-16 19:27:09,251 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [307030123] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-16 19:27:09,251 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-16 19:27:09,251 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-16 19:27:09,251 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1974769669] [2024-11-16 19:27:09,252 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-16 19:27:09,252 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-16 19:27:09,252 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-16 19:27:09,252 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-16 19:27:09,252 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-16 19:27:09,254 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 38 [2024-11-16 19:27:09,255 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 67 transitions, 556 flow. Second operand has 4 states, 4 states have (on average 20.0) internal successors, (80), 4 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-16 19:27:09,255 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-16 19:27:09,255 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 38 [2024-11-16 19:27:09,255 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-16 19:27:09,486 INFO L124 PetriNetUnfolderBase]: 1205/2645 cut-off events. [2024-11-16 19:27:09,486 INFO L125 PetriNetUnfolderBase]: For 10529/10733 co-relation queries the response was YES. [2024-11-16 19:27:09,492 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8835 conditions, 2645 events. 1205/2645 cut-off events. For 10529/10733 co-relation queries the response was YES. Maximal size of possible extension queue 111. Compared 17587 event pairs, 338 based on Foata normal form. 18/2340 useless extension candidates. Maximal degree in co-relation 8813. Up to 660 conditions per place. [2024-11-16 19:27:09,502 INFO L140 encePairwiseOnDemand]: 33/38 looper letters, 71 selfloop transitions, 25 changer transitions 0/123 dead transitions. [2024-11-16 19:27:09,503 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 77 places, 123 transitions, 1204 flow [2024-11-16 19:27:09,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-16 19:27:09,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-16 19:27:09,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 109 transitions. [2024-11-16 19:27:09,506 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.7171052631578947 [2024-11-16 19:27:09,506 INFO L175 Difference]: Start difference. First operand has 74 places, 67 transitions, 556 flow. Second operand 4 states and 109 transitions. [2024-11-16 19:27:09,507 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 77 places, 123 transitions, 1204 flow [2024-11-16 19:27:09,516 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 123 transitions, 1172 flow, removed 9 selfloop flow, removed 3 redundant places. [2024-11-16 19:27:09,518 INFO L231 Difference]: Finished difference. Result has 77 places, 90 transitions, 948 flow [2024-11-16 19:27:09,518 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=38, PETRI_DIFFERENCE_MINUEND_FLOW=538, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=67, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=948, PETRI_PLACES=77, PETRI_TRANSITIONS=90} [2024-11-16 19:27:09,519 INFO L277 CegarLoopForPetriNet]: 36 programPoint places, 41 predicate places. [2024-11-16 19:27:09,521 INFO L471 AbstractCegarLoop]: Abstraction has has 77 places, 90 transitions, 948 flow [2024-11-16 19:27:09,521 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 20.0) internal successors, (80), 4 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-16 19:27:09,521 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-16 19:27:09,521 INFO L204 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-16 19:27:09,521 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-11-16 19:27:09,522 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-16 19:27:09,522 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-16 19:27:09,522 INFO L85 PathProgramCache]: Analyzing trace with hash 278117787, now seen corresponding path program 1 times [2024-11-16 19:27:09,522 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-16 19:27:09,522 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1673445358] [2024-11-16 19:27:09,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 19:27:09,522 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-16 19:27:09,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 19:27:17,941 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 8 refuted. 2 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-16 19:27:17,942 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-16 19:27:17,942 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1673445358] [2024-11-16 19:27:17,942 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1673445358] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-16 19:27:17,942 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [922016972] [2024-11-16 19:27:17,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 19:27:17,942 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-16 19:27:17,942 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-16 19:27:17,944 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) [2024-11-16 19:27:17,945 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-16 19:27:18,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 19:27:18,048 INFO L255 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 5 conjuncts are in the unsatisfiable core [2024-11-16 19:27:18,049 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-16 19:27:18,280 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-16 19:27:18,280 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-16 19:27:18,530 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-16 19:27:18,530 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [922016972] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-16 19:27:18,530 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-16 19:27:18,530 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 5, 5] total 16 [2024-11-16 19:27:18,531 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2005143262] [2024-11-16 19:27:18,531 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-16 19:27:18,531 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-11-16 19:27:18,531 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-16 19:27:18,533 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-11-16 19:27:18,533 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=192, Unknown=2, NotChecked=0, Total=240 [2024-11-16 19:27:18,573 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 38 [2024-11-16 19:27:18,574 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 77 places, 90 transitions, 948 flow. Second operand has 16 states, 16 states have (on average 16.375) internal successors, (262), 16 states have internal predecessors, (262), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-16 19:27:18,574 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-16 19:27:18,574 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 38 [2024-11-16 19:27:18,574 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-16 19:27:19,732 INFO L124 PetriNetUnfolderBase]: 2625/5388 cut-off events. [2024-11-16 19:27:19,732 INFO L125 PetriNetUnfolderBase]: For 26856/26856 co-relation queries the response was YES. [2024-11-16 19:27:19,743 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19099 conditions, 5388 events. 2625/5388 cut-off events. For 26856/26856 co-relation queries the response was YES. Maximal size of possible extension queue 192. Compared 38976 event pairs, 148 based on Foata normal form. 124/5258 useless extension candidates. Maximal degree in co-relation 19074. Up to 1174 conditions per place. [2024-11-16 19:27:19,764 INFO L140 encePairwiseOnDemand]: 25/38 looper letters, 167 selfloop transitions, 56 changer transitions 0/235 dead transitions. [2024-11-16 19:27:19,764 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 93 places, 235 transitions, 2505 flow [2024-11-16 19:27:19,764 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-11-16 19:27:19,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2024-11-16 19:27:19,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 367 transitions. [2024-11-16 19:27:19,765 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5681114551083591 [2024-11-16 19:27:19,766 INFO L175 Difference]: Start difference. First operand has 77 places, 90 transitions, 948 flow. Second operand 17 states and 367 transitions. [2024-11-16 19:27:19,766 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 93 places, 235 transitions, 2505 flow [2024-11-16 19:27:19,781 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 93 places, 235 transitions, 2505 flow, removed 0 selfloop flow, removed 0 redundant places. [2024-11-16 19:27:19,784 INFO L231 Difference]: Finished difference. Result has 102 places, 124 transitions, 1596 flow [2024-11-16 19:27:19,785 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=38, PETRI_DIFFERENCE_MINUEND_FLOW=948, PETRI_DIFFERENCE_MINUEND_PLACES=77, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=90, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=1596, PETRI_PLACES=102, PETRI_TRANSITIONS=124} [2024-11-16 19:27:19,785 INFO L277 CegarLoopForPetriNet]: 36 programPoint places, 66 predicate places. [2024-11-16 19:27:19,785 INFO L471 AbstractCegarLoop]: Abstraction has has 102 places, 124 transitions, 1596 flow [2024-11-16 19:27:19,786 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 16.375) internal successors, (262), 16 states have internal predecessors, (262), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-16 19:27:19,786 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-16 19:27:19,786 INFO L204 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-16 19:27:19,799 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-11-16 19:27:19,986 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2024-11-16 19:27:19,988 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-16 19:27:19,989 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-16 19:27:19,989 INFO L85 PathProgramCache]: Analyzing trace with hash 1303729855, now seen corresponding path program 1 times [2024-11-16 19:27:19,989 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-16 19:27:19,989 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2079278141] [2024-11-16 19:27:19,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 19:27:19,989 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-16 19:27:20,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 19:27:20,153 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-16 19:27:20,153 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-16 19:27:20,154 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2079278141] [2024-11-16 19:27:20,154 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2079278141] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-16 19:27:20,154 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-16 19:27:20,154 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-16 19:27:20,154 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [890057200] [2024-11-16 19:27:20,154 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-16 19:27:20,155 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-16 19:27:20,155 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-16 19:27:20,155 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-16 19:27:20,156 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-16 19:27:20,158 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 38 [2024-11-16 19:27:20,159 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 102 places, 124 transitions, 1596 flow. Second operand has 4 states, 4 states have (on average 20.25) internal successors, (81), 4 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-16 19:27:20,159 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-16 19:27:20,159 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 38 [2024-11-16 19:27:20,159 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-16 19:27:20,513 INFO L124 PetriNetUnfolderBase]: 1466/3351 cut-off events. [2024-11-16 19:27:20,513 INFO L125 PetriNetUnfolderBase]: For 22839/23011 co-relation queries the response was YES. [2024-11-16 19:27:20,522 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13075 conditions, 3351 events. 1466/3351 cut-off events. For 22839/23011 co-relation queries the response was YES. Maximal size of possible extension queue 117. Compared 23472 event pairs, 314 based on Foata normal form. 44/3046 useless extension candidates. Maximal degree in co-relation 13041. Up to 1038 conditions per place. [2024-11-16 19:27:20,538 INFO L140 encePairwiseOnDemand]: 34/38 looper letters, 82 selfloop transitions, 33 changer transitions 0/152 dead transitions. [2024-11-16 19:27:20,538 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 105 places, 152 transitions, 1955 flow [2024-11-16 19:27:20,539 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-16 19:27:20,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-16 19:27:20,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 104 transitions. [2024-11-16 19:27:20,540 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6842105263157895 [2024-11-16 19:27:20,540 INFO L175 Difference]: Start difference. First operand has 102 places, 124 transitions, 1596 flow. Second operand 4 states and 104 transitions. [2024-11-16 19:27:20,540 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 105 places, 152 transitions, 1955 flow [2024-11-16 19:27:20,567 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 100 places, 152 transitions, 1857 flow, removed 30 selfloop flow, removed 5 redundant places. [2024-11-16 19:27:20,569 INFO L231 Difference]: Finished difference. Result has 102 places, 113 transitions, 1442 flow [2024-11-16 19:27:20,569 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=38, PETRI_DIFFERENCE_MINUEND_FLOW=1333, PETRI_DIFFERENCE_MINUEND_PLACES=97, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=112, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=79, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=1442, PETRI_PLACES=102, PETRI_TRANSITIONS=113} [2024-11-16 19:27:20,570 INFO L277 CegarLoopForPetriNet]: 36 programPoint places, 66 predicate places. [2024-11-16 19:27:20,570 INFO L471 AbstractCegarLoop]: Abstraction has has 102 places, 113 transitions, 1442 flow [2024-11-16 19:27:20,570 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 20.25) internal successors, (81), 4 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-16 19:27:20,570 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-16 19:27:20,570 INFO L204 CegarLoopForPetriNet]: trace histogram [3, 3, 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] [2024-11-16 19:27:20,570 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-11-16 19:27:20,571 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-16 19:27:20,571 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-16 19:27:20,571 INFO L85 PathProgramCache]: Analyzing trace with hash -67037824, now seen corresponding path program 2 times [2024-11-16 19:27:20,572 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-16 19:27:20,572 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1926190839] [2024-11-16 19:27:20,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 19:27:20,572 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-16 19:27:20,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 19:27:20,671 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-16 19:27:20,671 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-16 19:27:20,671 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1926190839] [2024-11-16 19:27:20,674 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1926190839] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-16 19:27:20,674 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-16 19:27:20,674 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-16 19:27:20,674 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [95621730] [2024-11-16 19:27:20,674 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-16 19:27:20,674 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-16 19:27:20,675 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-16 19:27:20,675 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-16 19:27:20,675 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-16 19:27:20,677 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 38 [2024-11-16 19:27:20,677 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 102 places, 113 transitions, 1442 flow. Second operand has 4 states, 4 states have (on average 20.5) internal successors, (82), 4 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-16 19:27:20,678 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-16 19:27:20,678 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 38 [2024-11-16 19:27:20,678 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-16 19:27:21,489 INFO L124 PetriNetUnfolderBase]: 3423/7329 cut-off events. [2024-11-16 19:27:21,490 INFO L125 PetriNetUnfolderBase]: For 57804/57994 co-relation queries the response was YES. [2024-11-16 19:27:21,509 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30070 conditions, 7329 events. 3423/7329 cut-off events. For 57804/57994 co-relation queries the response was YES. Maximal size of possible extension queue 290. Compared 60448 event pairs, 1264 based on Foata normal form. 28/6831 useless extension candidates. Maximal degree in co-relation 30034. Up to 2152 conditions per place. [2024-11-16 19:27:21,530 INFO L140 encePairwiseOnDemand]: 33/38 looper letters, 156 selfloop transitions, 29 changer transitions 0/224 dead transitions. [2024-11-16 19:27:21,530 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 105 places, 224 transitions, 3449 flow [2024-11-16 19:27:21,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-16 19:27:21,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-16 19:27:21,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 105 transitions. [2024-11-16 19:27:21,532 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6907894736842105 [2024-11-16 19:27:21,532 INFO L175 Difference]: Start difference. First operand has 102 places, 113 transitions, 1442 flow. Second operand 4 states and 105 transitions. [2024-11-16 19:27:21,532 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 105 places, 224 transitions, 3449 flow [2024-11-16 19:27:21,600 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 104 places, 224 transitions, 3440 flow, removed 1 selfloop flow, removed 1 redundant places. [2024-11-16 19:27:21,602 INFO L231 Difference]: Finished difference. Result has 107 places, 140 transitions, 1903 flow [2024-11-16 19:27:21,603 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=38, PETRI_DIFFERENCE_MINUEND_FLOW=1436, PETRI_DIFFERENCE_MINUEND_PLACES=101, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=113, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=94, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=1903, PETRI_PLACES=107, PETRI_TRANSITIONS=140} [2024-11-16 19:27:21,603 INFO L277 CegarLoopForPetriNet]: 36 programPoint places, 71 predicate places. [2024-11-16 19:27:21,603 INFO L471 AbstractCegarLoop]: Abstraction has has 107 places, 140 transitions, 1903 flow [2024-11-16 19:27:21,604 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 20.5) internal successors, (82), 4 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-16 19:27:21,604 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-16 19:27:21,604 INFO L204 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-16 19:27:21,604 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-11-16 19:27:21,604 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-16 19:27:21,604 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-16 19:27:21,604 INFO L85 PathProgramCache]: Analyzing trace with hash 760992710, now seen corresponding path program 1 times [2024-11-16 19:27:21,605 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-16 19:27:21,605 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1840826131] [2024-11-16 19:27:21,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 19:27:21,605 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-16 19:27:21,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 19:27:21,778 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-16 19:27:21,779 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-16 19:27:21,779 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1840826131] [2024-11-16 19:27:21,780 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1840826131] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-16 19:27:21,780 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [447248884] [2024-11-16 19:27:21,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 19:27:21,780 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-16 19:27:21,780 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-16 19:27:21,782 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) [2024-11-16 19:27:21,784 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-16 19:27:21,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 19:27:21,829 INFO L255 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-11-16 19:27:21,830 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-16 19:27:21,909 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-16 19:27:21,909 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-16 19:27:21,998 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-16 19:27:21,999 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [447248884] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-16 19:27:21,999 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-16 19:27:21,999 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 6 [2024-11-16 19:27:21,999 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1197474345] [2024-11-16 19:27:21,999 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-16 19:27:22,000 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-16 19:27:22,000 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-16 19:27:22,000 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-16 19:27:22,000 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-11-16 19:27:22,000 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 38 [2024-11-16 19:27:22,001 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 107 places, 140 transitions, 1903 flow. Second operand has 6 states, 6 states have (on average 20.333333333333332) internal successors, (122), 6 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-16 19:27:22,001 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-16 19:27:22,001 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 38 [2024-11-16 19:27:22,001 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-16 19:27:23,612 INFO L124 PetriNetUnfolderBase]: 4467/10900 cut-off events. [2024-11-16 19:27:23,612 INFO L125 PetriNetUnfolderBase]: For 105678/105968 co-relation queries the response was YES. [2024-11-16 19:27:23,653 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48765 conditions, 10900 events. 4467/10900 cut-off events. For 105678/105968 co-relation queries the response was YES. Maximal size of possible extension queue 381. Compared 102059 event pairs, 1117 based on Foata normal form. 54/10508 useless extension candidates. Maximal degree in co-relation 48727. Up to 3750 conditions per place. [2024-11-16 19:27:23,703 INFO L140 encePairwiseOnDemand]: 30/38 looper letters, 262 selfloop transitions, 23 changer transitions 1/328 dead transitions. [2024-11-16 19:27:23,704 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 112 places, 328 transitions, 5231 flow [2024-11-16 19:27:23,704 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-16 19:27:23,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-16 19:27:23,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 172 transitions. [2024-11-16 19:27:23,705 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.7543859649122807 [2024-11-16 19:27:23,705 INFO L175 Difference]: Start difference. First operand has 107 places, 140 transitions, 1903 flow. Second operand 6 states and 172 transitions. [2024-11-16 19:27:23,705 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 112 places, 328 transitions, 5231 flow [2024-11-16 19:27:23,846 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 112 places, 328 transitions, 5231 flow, removed 0 selfloop flow, removed 0 redundant places. [2024-11-16 19:27:23,850 INFO L231 Difference]: Finished difference. Result has 113 places, 156 transitions, 2037 flow [2024-11-16 19:27:23,850 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=38, PETRI_DIFFERENCE_MINUEND_FLOW=1903, PETRI_DIFFERENCE_MINUEND_PLACES=107, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=140, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=129, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2037, PETRI_PLACES=113, PETRI_TRANSITIONS=156} [2024-11-16 19:27:23,851 INFO L277 CegarLoopForPetriNet]: 36 programPoint places, 77 predicate places. [2024-11-16 19:27:23,852 INFO L471 AbstractCegarLoop]: Abstraction has has 113 places, 156 transitions, 2037 flow [2024-11-16 19:27:23,852 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 20.333333333333332) internal successors, (122), 6 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-16 19:27:23,852 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-16 19:27:23,853 INFO L204 CegarLoopForPetriNet]: trace histogram [3, 3, 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] [2024-11-16 19:27:23,867 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2024-11-16 19:27:24,056 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-16 19:27:24,057 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-16 19:27:24,057 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-16 19:27:24,057 INFO L85 PathProgramCache]: Analyzing trace with hash 129161692, now seen corresponding path program 1 times [2024-11-16 19:27:24,057 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-16 19:27:24,057 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2118792989] [2024-11-16 19:27:24,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 19:27:24,058 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-16 19:27:24,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 19:27:24,159 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-16 19:27:24,159 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-16 19:27:24,159 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2118792989] [2024-11-16 19:27:24,159 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2118792989] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-16 19:27:24,159 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-16 19:27:24,160 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-16 19:27:24,160 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [770905460] [2024-11-16 19:27:24,160 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-16 19:27:24,160 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-16 19:27:24,160 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-16 19:27:24,161 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-16 19:27:24,161 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-16 19:27:24,163 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 38 [2024-11-16 19:27:24,163 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 113 places, 156 transitions, 2037 flow. Second operand has 4 states, 4 states have (on average 20.5) internal successors, (82), 4 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-16 19:27:24,163 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-16 19:27:24,164 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 38 [2024-11-16 19:27:24,164 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-16 19:27:25,297 INFO L124 PetriNetUnfolderBase]: 4882/10936 cut-off events. [2024-11-16 19:27:25,297 INFO L125 PetriNetUnfolderBase]: For 105828/106030 co-relation queries the response was YES. [2024-11-16 19:27:25,332 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50783 conditions, 10936 events. 4882/10936 cut-off events. For 105828/106030 co-relation queries the response was YES. Maximal size of possible extension queue 359. Compared 96802 event pairs, 1114 based on Foata normal form. 184/10746 useless extension candidates. Maximal degree in co-relation 50743. Up to 3556 conditions per place. [2024-11-16 19:27:25,366 INFO L140 encePairwiseOnDemand]: 34/38 looper letters, 153 selfloop transitions, 29 changer transitions 0/221 dead transitions. [2024-11-16 19:27:25,367 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 116 places, 221 transitions, 3309 flow [2024-11-16 19:27:25,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-16 19:27:25,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-16 19:27:25,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 101 transitions. [2024-11-16 19:27:25,368 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6644736842105263 [2024-11-16 19:27:25,368 INFO L175 Difference]: Start difference. First operand has 113 places, 156 transitions, 2037 flow. Second operand 4 states and 101 transitions. [2024-11-16 19:27:25,368 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 116 places, 221 transitions, 3309 flow [2024-11-16 19:27:25,618 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 116 places, 221 transitions, 3251 flow, removed 29 selfloop flow, removed 0 redundant places. [2024-11-16 19:27:25,620 INFO L231 Difference]: Finished difference. Result has 118 places, 146 transitions, 1957 flow [2024-11-16 19:27:25,621 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=38, PETRI_DIFFERENCE_MINUEND_FLOW=1862, PETRI_DIFFERENCE_MINUEND_PLACES=113, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=145, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=116, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=1957, PETRI_PLACES=118, PETRI_TRANSITIONS=146} [2024-11-16 19:27:25,621 INFO L277 CegarLoopForPetriNet]: 36 programPoint places, 82 predicate places. [2024-11-16 19:27:25,621 INFO L471 AbstractCegarLoop]: Abstraction has has 118 places, 146 transitions, 1957 flow [2024-11-16 19:27:25,622 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 20.5) internal successors, (82), 4 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-16 19:27:25,622 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-16 19:27:25,622 INFO L204 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-16 19:27:25,622 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-11-16 19:27:25,622 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-16 19:27:25,622 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-16 19:27:25,623 INFO L85 PathProgramCache]: Analyzing trace with hash 377934246, now seen corresponding path program 2 times [2024-11-16 19:27:25,623 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-16 19:27:25,623 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1428696729] [2024-11-16 19:27:25,623 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 19:27:25,623 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-16 19:27:25,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 19:27:25,779 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-16 19:27:25,779 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-16 19:27:25,779 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1428696729] [2024-11-16 19:27:25,779 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1428696729] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-16 19:27:25,779 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1001676415] [2024-11-16 19:27:25,780 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-16 19:27:25,780 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-16 19:27:25,780 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-16 19:27:25,782 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) [2024-11-16 19:27:25,783 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-16 19:27:25,834 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-16 19:27:25,834 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-16 19:27:25,835 INFO L255 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-11-16 19:27:25,838 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-16 19:27:25,910 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-16 19:27:25,910 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-16 19:27:25,992 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-16 19:27:25,993 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1001676415] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-16 19:27:25,993 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-16 19:27:25,993 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 6 [2024-11-16 19:27:25,993 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [747408988] [2024-11-16 19:27:25,994 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-16 19:27:25,994 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-16 19:27:25,994 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-16 19:27:25,995 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-16 19:27:25,995 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-11-16 19:27:25,995 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 38 [2024-11-16 19:27:25,995 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 118 places, 146 transitions, 1957 flow. Second operand has 6 states, 6 states have (on average 20.333333333333332) internal successors, (122), 6 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-16 19:27:25,995 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-16 19:27:25,995 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 38 [2024-11-16 19:27:25,996 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-16 19:27:27,546 INFO L124 PetriNetUnfolderBase]: 4582/11546 cut-off events. [2024-11-16 19:27:27,546 INFO L125 PetriNetUnfolderBase]: For 132084/132514 co-relation queries the response was YES. [2024-11-16 19:27:27,585 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55508 conditions, 11546 events. 4582/11546 cut-off events. For 132084/132514 co-relation queries the response was YES. Maximal size of possible extension queue 360. Compared 111184 event pairs, 1088 based on Foata normal form. 82/11283 useless extension candidates. Maximal degree in co-relation 55466. Up to 5068 conditions per place. [2024-11-16 19:27:27,619 INFO L140 encePairwiseOnDemand]: 30/38 looper letters, 239 selfloop transitions, 25 changer transitions 1/308 dead transitions. [2024-11-16 19:27:27,619 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 123 places, 308 transitions, 4897 flow [2024-11-16 19:27:27,619 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-16 19:27:27,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-16 19:27:27,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 169 transitions. [2024-11-16 19:27:27,620 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.7412280701754386 [2024-11-16 19:27:27,620 INFO L175 Difference]: Start difference. First operand has 118 places, 146 transitions, 1957 flow. Second operand 6 states and 169 transitions. [2024-11-16 19:27:27,620 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 123 places, 308 transitions, 4897 flow [2024-11-16 19:27:27,765 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 123 places, 308 transitions, 4897 flow, removed 0 selfloop flow, removed 0 redundant places. [2024-11-16 19:27:27,768 INFO L231 Difference]: Finished difference. Result has 125 places, 163 transitions, 2133 flow [2024-11-16 19:27:27,768 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=38, PETRI_DIFFERENCE_MINUEND_FLOW=1957, PETRI_DIFFERENCE_MINUEND_PLACES=118, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=146, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=129, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2133, PETRI_PLACES=125, PETRI_TRANSITIONS=163} [2024-11-16 19:27:27,768 INFO L277 CegarLoopForPetriNet]: 36 programPoint places, 89 predicate places. [2024-11-16 19:27:27,768 INFO L471 AbstractCegarLoop]: Abstraction has has 125 places, 163 transitions, 2133 flow [2024-11-16 19:27:27,768 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 20.333333333333332) internal successors, (122), 6 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-16 19:27:27,768 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-16 19:27:27,769 INFO L204 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-16 19:27:27,781 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-11-16 19:27:27,969 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-16 19:27:27,969 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-16 19:27:27,970 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-16 19:27:27,970 INFO L85 PathProgramCache]: Analyzing trace with hash 1827276840, now seen corresponding path program 3 times [2024-11-16 19:27:27,970 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-16 19:27:27,970 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1080972878] [2024-11-16 19:27:27,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 19:27:27,970 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-16 19:27:27,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 19:27:28,116 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-16 19:27:28,117 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-16 19:27:28,117 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1080972878] [2024-11-16 19:27:28,117 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1080972878] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-16 19:27:28,117 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1173601083] [2024-11-16 19:27:28,117 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-16 19:27:28,117 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-16 19:27:28,117 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-16 19:27:28,119 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) [2024-11-16 19:27:28,120 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-16 19:27:28,175 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-11-16 19:27:28,175 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-16 19:27:28,176 INFO L255 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-11-16 19:27:28,177 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-16 19:27:28,246 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-16 19:27:28,247 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-16 19:27:28,324 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-16 19:27:28,325 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1173601083] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-16 19:27:28,325 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-16 19:27:28,325 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 6 [2024-11-16 19:27:28,326 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1848605041] [2024-11-16 19:27:28,326 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-16 19:27:28,326 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-16 19:27:28,326 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-16 19:27:28,326 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-16 19:27:28,326 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-11-16 19:27:28,327 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 38 [2024-11-16 19:27:28,327 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 125 places, 163 transitions, 2133 flow. Second operand has 6 states, 6 states have (on average 20.333333333333332) internal successors, (122), 6 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-16 19:27:28,327 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-16 19:27:28,328 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 38 [2024-11-16 19:27:28,328 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-16 19:27:30,532 INFO L124 PetriNetUnfolderBase]: 6130/15345 cut-off events. [2024-11-16 19:27:30,532 INFO L125 PetriNetUnfolderBase]: For 181602/182260 co-relation queries the response was YES. [2024-11-16 19:27:30,583 INFO L83 FinitePrefix]: Finished finitePrefix Result has 76100 conditions, 15345 events. 6130/15345 cut-off events. For 181602/182260 co-relation queries the response was YES. Maximal size of possible extension queue 480. Compared 154889 event pairs, 1436 based on Foata normal form. 151/14948 useless extension candidates. Maximal degree in co-relation 76055. Up to 4929 conditions per place. [2024-11-16 19:27:30,629 INFO L140 encePairwiseOnDemand]: 30/38 looper letters, 272 selfloop transitions, 42 changer transitions 1/358 dead transitions. [2024-11-16 19:27:30,629 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 130 places, 358 transitions, 5774 flow [2024-11-16 19:27:30,630 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-16 19:27:30,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-16 19:27:30,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 171 transitions. [2024-11-16 19:27:30,631 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.75 [2024-11-16 19:27:30,631 INFO L175 Difference]: Start difference. First operand has 125 places, 163 transitions, 2133 flow. Second operand 6 states and 171 transitions. [2024-11-16 19:27:30,631 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 130 places, 358 transitions, 5774 flow [2024-11-16 19:27:30,840 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 130 places, 358 transitions, 5760 flow, removed 7 selfloop flow, removed 0 redundant places. [2024-11-16 19:27:30,844 INFO L231 Difference]: Finished difference. Result has 134 places, 186 transitions, 2462 flow [2024-11-16 19:27:30,844 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=38, PETRI_DIFFERENCE_MINUEND_FLOW=2123, PETRI_DIFFERENCE_MINUEND_PLACES=125, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=163, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=125, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2462, PETRI_PLACES=134, PETRI_TRANSITIONS=186} [2024-11-16 19:27:30,844 INFO L277 CegarLoopForPetriNet]: 36 programPoint places, 98 predicate places. [2024-11-16 19:27:30,844 INFO L471 AbstractCegarLoop]: Abstraction has has 134 places, 186 transitions, 2462 flow [2024-11-16 19:27:30,845 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 20.333333333333332) internal successors, (122), 6 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-16 19:27:30,845 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-16 19:27:30,845 INFO L204 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-16 19:27:30,857 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2024-11-16 19:27:31,045 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2024-11-16 19:27:31,045 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-16 19:27:31,046 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-16 19:27:31,046 INFO L85 PathProgramCache]: Analyzing trace with hash 977859948, now seen corresponding path program 4 times [2024-11-16 19:27:31,046 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-16 19:27:31,046 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [433808319] [2024-11-16 19:27:31,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 19:27:31,046 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-16 19:27:31,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 19:27:31,170 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-16 19:27:31,170 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-16 19:27:31,171 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [433808319] [2024-11-16 19:27:31,171 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [433808319] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-16 19:27:31,171 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1844587226] [2024-11-16 19:27:31,171 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-16 19:27:31,171 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-16 19:27:31,171 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-16 19:27:31,173 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) [2024-11-16 19:27:31,173 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-11-16 19:27:31,219 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-16 19:27:31,219 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-16 19:27:31,220 INFO L255 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 16 conjuncts are in the unsatisfiable core [2024-11-16 19:27:31,221 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-16 19:27:31,288 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-16 19:27:31,288 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-16 19:27:31,366 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-16 19:27:31,367 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1844587226] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-16 19:27:31,367 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-16 19:27:31,367 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 6 [2024-11-16 19:27:31,367 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1746008112] [2024-11-16 19:27:31,367 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-16 19:27:31,367 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-16 19:27:31,368 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-16 19:27:31,368 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-16 19:27:31,368 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-11-16 19:27:31,368 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 38 [2024-11-16 19:27:31,368 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 134 places, 186 transitions, 2462 flow. Second operand has 6 states, 6 states have (on average 20.333333333333332) internal successors, (122), 6 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-16 19:27:31,369 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-16 19:27:31,369 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 38 [2024-11-16 19:27:31,369 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-16 19:27:33,834 INFO L124 PetriNetUnfolderBase]: 6666/16880 cut-off events. [2024-11-16 19:27:33,834 INFO L125 PetriNetUnfolderBase]: For 209158/210026 co-relation queries the response was YES. [2024-11-16 19:27:33,898 INFO L83 FinitePrefix]: Finished finitePrefix Result has 86896 conditions, 16880 events. 6666/16880 cut-off events. For 209158/210026 co-relation queries the response was YES. Maximal size of possible extension queue 521. Compared 173937 event pairs, 1553 based on Foata normal form. 185/16585 useless extension candidates. Maximal degree in co-relation 86846. Up to 7529 conditions per place. [2024-11-16 19:27:33,949 INFO L140 encePairwiseOnDemand]: 30/38 looper letters, 271 selfloop transitions, 31 changer transitions 1/346 dead transitions. [2024-11-16 19:27:33,949 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 139 places, 346 transitions, 5551 flow [2024-11-16 19:27:33,949 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-16 19:27:33,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-16 19:27:33,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 169 transitions. [2024-11-16 19:27:33,950 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.7412280701754386 [2024-11-16 19:27:33,950 INFO L175 Difference]: Start difference. First operand has 134 places, 186 transitions, 2462 flow. Second operand 6 states and 169 transitions. [2024-11-16 19:27:33,950 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 139 places, 346 transitions, 5551 flow [2024-11-16 19:27:34,247 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 139 places, 346 transitions, 5533 flow, removed 9 selfloop flow, removed 0 redundant places. [2024-11-16 19:27:34,250 INFO L231 Difference]: Finished difference. Result has 142 places, 201 transitions, 2704 flow [2024-11-16 19:27:34,250 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=38, PETRI_DIFFERENCE_MINUEND_FLOW=2448, PETRI_DIFFERENCE_MINUEND_PLACES=134, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=186, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=159, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2704, PETRI_PLACES=142, PETRI_TRANSITIONS=201} [2024-11-16 19:27:34,251 INFO L277 CegarLoopForPetriNet]: 36 programPoint places, 106 predicate places. [2024-11-16 19:27:34,251 INFO L471 AbstractCegarLoop]: Abstraction has has 142 places, 201 transitions, 2704 flow [2024-11-16 19:27:34,251 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 20.333333333333332) internal successors, (122), 6 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-16 19:27:34,251 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-16 19:27:34,251 INFO L204 CegarLoopForPetriNet]: trace histogram [4, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-16 19:27:34,263 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-11-16 19:27:34,451 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2024-11-16 19:27:34,452 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-16 19:27:34,452 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-16 19:27:34,452 INFO L85 PathProgramCache]: Analyzing trace with hash 2106951091, now seen corresponding path program 5 times [2024-11-16 19:27:34,452 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-16 19:27:34,452 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2058579437] [2024-11-16 19:27:34,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 19:27:34,453 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-16 19:27:34,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 19:27:34,832 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 2 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-16 19:27:34,832 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-16 19:27:34,832 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2058579437] [2024-11-16 19:27:34,832 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2058579437] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-16 19:27:34,832 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [981482024] [2024-11-16 19:27:34,832 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-16 19:27:34,832 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-16 19:27:34,833 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-16 19:27:34,834 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) [2024-11-16 19:27:34,835 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-11-16 19:27:34,902 INFO L227 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2024-11-16 19:27:34,903 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-16 19:27:34,905 INFO L255 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 11 conjuncts are in the unsatisfiable core [2024-11-16 19:27:34,907 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-16 19:27:35,404 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-16 19:27:35,404 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-16 19:27:35,838 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-16 19:27:35,838 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [981482024] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-16 19:27:35,838 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-16 19:27:35,839 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 8] total 19 [2024-11-16 19:27:35,839 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1398441602] [2024-11-16 19:27:35,839 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-16 19:27:35,839 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-11-16 19:27:35,839 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-16 19:27:35,840 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-11-16 19:27:35,840 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=265, Unknown=0, NotChecked=0, Total=342 [2024-11-16 19:27:35,861 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 38 [2024-11-16 19:27:35,862 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 142 places, 201 transitions, 2704 flow. Second operand has 19 states, 19 states have (on average 16.526315789473685) internal successors, (314), 19 states have internal predecessors, (314), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-16 19:27:35,862 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-16 19:27:35,862 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 38 [2024-11-16 19:27:35,862 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-16 19:27:47,950 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-11-16 19:28:00,256 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.30s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-11-16 19:28:05,363 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-11-16 19:28:15,106 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.23s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-11-16 19:28:24,161 INFO L124 PetriNetUnfolderBase]: 36861/79092 cut-off events. [2024-11-16 19:28:24,162 INFO L125 PetriNetUnfolderBase]: For 939945/939945 co-relation queries the response was YES. [2024-11-16 19:28:24,763 INFO L83 FinitePrefix]: Finished finitePrefix Result has 402838 conditions, 79092 events. 36861/79092 cut-off events. For 939945/939945 co-relation queries the response was YES. Maximal size of possible extension queue 1986. Compared 876972 event pairs, 2220 based on Foata normal form. 712/79802 useless extension candidates. Maximal degree in co-relation 402784. Up to 12620 conditions per place. [2024-11-16 19:28:25,159 INFO L140 encePairwiseOnDemand]: 25/38 looper letters, 1280 selfloop transitions, 316 changer transitions 1/1612 dead transitions. [2024-11-16 19:28:25,159 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 185 places, 1612 transitions, 21243 flow [2024-11-16 19:28:25,160 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2024-11-16 19:28:25,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2024-11-16 19:28:25,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 971 transitions. [2024-11-16 19:28:25,162 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5807416267942583 [2024-11-16 19:28:25,162 INFO L175 Difference]: Start difference. First operand has 142 places, 201 transitions, 2704 flow. Second operand 44 states and 971 transitions. [2024-11-16 19:28:25,162 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 185 places, 1612 transitions, 21243 flow [2024-11-16 19:28:27,295 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 184 places, 1612 transitions, 20833 flow, removed 181 selfloop flow, removed 1 redundant places. [2024-11-16 19:28:27,307 INFO L231 Difference]: Finished difference. Result has 203 places, 481 transitions, 8843 flow [2024-11-16 19:28:27,307 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=38, PETRI_DIFFERENCE_MINUEND_FLOW=2671, PETRI_DIFFERENCE_MINUEND_PLACES=141, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=201, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=82, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=109, PETRI_DIFFERENCE_SUBTRAHEND_STATES=44, PETRI_FLOW=8843, PETRI_PLACES=203, PETRI_TRANSITIONS=481} [2024-11-16 19:28:27,307 INFO L277 CegarLoopForPetriNet]: 36 programPoint places, 167 predicate places. [2024-11-16 19:28:27,308 INFO L471 AbstractCegarLoop]: Abstraction has has 203 places, 481 transitions, 8843 flow [2024-11-16 19:28:27,308 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 16.526315789473685) internal successors, (314), 19 states have internal predecessors, (314), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-16 19:28:27,308 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-16 19:28:27,308 INFO L204 CegarLoopForPetriNet]: trace histogram [4, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-16 19:28:27,320 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2024-11-16 19:28:27,512 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-16 19:28:27,513 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-16 19:28:27,513 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-16 19:28:27,513 INFO L85 PathProgramCache]: Analyzing trace with hash 1654191765, now seen corresponding path program 6 times [2024-11-16 19:28:27,513 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-16 19:28:27,513 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1451447531] [2024-11-16 19:28:27,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 19:28:27,513 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-16 19:28:27,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 19:28:27,757 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-16 19:28:27,757 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-16 19:28:27,757 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1451447531] [2024-11-16 19:28:27,757 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1451447531] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-16 19:28:27,757 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [675813705] [2024-11-16 19:28:27,757 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-16 19:28:27,758 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-16 19:28:27,758 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-16 19:28:27,759 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) [2024-11-16 19:28:27,760 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-11-16 19:28:27,833 INFO L227 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2024-11-16 19:28:27,833 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-16 19:28:27,834 INFO L255 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 11 conjuncts are in the unsatisfiable core [2024-11-16 19:28:27,835 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-16 19:28:28,078 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 11 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-16 19:28:28,078 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-16 19:28:28,313 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 11 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-16 19:28:28,313 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [675813705] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-16 19:28:28,313 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-16 19:28:28,313 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8, 8] total 23 [2024-11-16 19:28:28,313 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1853115488] [2024-11-16 19:28:28,313 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-16 19:28:28,314 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2024-11-16 19:28:28,314 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-16 19:28:28,314 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2024-11-16 19:28:28,315 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=432, Unknown=0, NotChecked=0, Total=506 [2024-11-16 19:28:28,371 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 38 [2024-11-16 19:28:28,372 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 203 places, 481 transitions, 8843 flow. Second operand has 23 states, 23 states have (on average 16.217391304347824) internal successors, (373), 23 states have internal predecessors, (373), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-16 19:28:28,372 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-16 19:28:28,372 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 38 [2024-11-16 19:28:28,372 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-16 19:28:37,128 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers []