./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/weaver/popl20-figure1.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/popl20-figure1.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 facd7612076746f2d167aef7303c13ba7b66236eba7a99773acf1e3861338848 --- Real Ultimate output --- This is Ultimate 0.2.5-tmp.fs.icfgbuilder-eval-3289d67-m [2024-11-16 19:29:18,761 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-16 19:29:18,846 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-11-16 19:29:18,851 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-16 19:29:18,851 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-16 19:29:18,887 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-16 19:29:18,888 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-16 19:29:18,888 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-16 19:29:18,889 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-16 19:29:18,892 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-16 19:29:18,892 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-16 19:29:18,893 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-16 19:29:18,893 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-16 19:29:18,893 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-16 19:29:18,894 INFO L153 SettingsManager]: * Use SBE=true [2024-11-16 19:29:18,894 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-16 19:29:18,894 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-11-16 19:29:18,894 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-16 19:29:18,895 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-16 19:29:18,897 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-16 19:29:18,898 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-16 19:29:18,898 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-11-16 19:29:18,898 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-16 19:29:18,898 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-11-16 19:29:18,899 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-16 19:29:18,899 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-16 19:29:18,899 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-11-16 19:29:18,899 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-16 19:29:18,900 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2024-11-16 19:29:18,900 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-16 19:29:18,900 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-16 19:29:18,900 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-16 19:29:18,900 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-16 19:29:18,901 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-16 19:29:18,901 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-16 19:29:18,901 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-11-16 19:29:18,901 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-16 19:29:18,901 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-16 19:29:18,902 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-16 19:29:18,902 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-16 19:29:18,902 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-16 19:29:18,903 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-16 19:29:18,903 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> facd7612076746f2d167aef7303c13ba7b66236eba7a99773acf1e3861338848 [2024-11-16 19:29:19,162 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-16 19:29:19,185 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-16 19:29:19,188 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-16 19:29:19,189 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-16 19:29:19,190 INFO L274 PluginConnector]: CDTParser initialized [2024-11-16 19:29:19,191 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/weaver/popl20-figure1.wvr.c [2024-11-16 19:29:20,690 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-16 19:29:20,873 INFO L384 CDTParser]: Found 1 translation units. [2024-11-16 19:29:20,873 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/popl20-figure1.wvr.c [2024-11-16 19:29:20,885 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d2303b880/f7cb8e5e42f5459cafb1dd73a4571cb3/FLAG65c43feea [2024-11-16 19:29:21,275 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d2303b880/f7cb8e5e42f5459cafb1dd73a4571cb3 [2024-11-16 19:29:21,280 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-16 19:29:21,281 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-16 19:29:21,283 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-16 19:29:21,284 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-16 19:29:21,289 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-16 19:29:21,290 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.11 07:29:21" (1/1) ... [2024-11-16 19:29:21,291 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@458eabbe and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:29:21, skipping insertion in model container [2024-11-16 19:29:21,291 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.11 07:29:21" (1/1) ... [2024-11-16 19:29:21,311 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-16 19:29:21,491 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/popl20-figure1.wvr.c[1825,1838] [2024-11-16 19:29:21,495 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-16 19:29:21,506 INFO L200 MainTranslator]: Completed pre-run [2024-11-16 19:29:21,520 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/popl20-figure1.wvr.c[1825,1838] [2024-11-16 19:29:21,521 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-16 19:29:21,535 INFO L204 MainTranslator]: Completed translation [2024-11-16 19:29:21,536 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:29:21 WrapperNode [2024-11-16 19:29:21,536 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-16 19:29:21,537 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-16 19:29:21,537 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-16 19:29:21,537 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-16 19:29:21,543 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:29:21" (1/1) ... [2024-11-16 19:29:21,549 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:29:21" (1/1) ... [2024-11-16 19:29:21,564 INFO L138 Inliner]: procedures = 18, calls = 10, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 56 [2024-11-16 19:29:21,565 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-16 19:29:21,565 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-16 19:29:21,565 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-16 19:29:21,566 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-16 19:29:21,575 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:29:21" (1/1) ... [2024-11-16 19:29:21,576 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:29:21" (1/1) ... [2024-11-16 19:29:21,577 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:29:21" (1/1) ... [2024-11-16 19:29:21,587 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 19:29:21,588 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:29:21" (1/1) ... [2024-11-16 19:29:21,588 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:29:21" (1/1) ... [2024-11-16 19:29:21,591 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:29:21" (1/1) ... [2024-11-16 19:29:21,592 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:29:21" (1/1) ... [2024-11-16 19:29:21,593 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:29:21" (1/1) ... [2024-11-16 19:29:21,593 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:29:21" (1/1) ... [2024-11-16 19:29:21,595 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-16 19:29:21,596 INFO L112 PluginConnector]: ------------------------IcfgBuilder---------------------------- [2024-11-16 19:29:21,596 INFO L270 PluginConnector]: Initializing IcfgBuilder... [2024-11-16 19:29:21,596 INFO L274 PluginConnector]: IcfgBuilder initialized [2024-11-16 19:29:21,597 INFO L184 PluginConnector]: Executing the observer IcfgBuilderObserver from plugin IcfgBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:29:21" (1/1) ... [2024-11-16 19:29:21,607 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-16 19:29:21,621 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-16 19:29:21,641 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 19:29:21,645 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 19:29:21,695 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-16 19:29:21,695 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2024-11-16 19:29:21,696 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2024-11-16 19:29:21,696 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2024-11-16 19:29:21,696 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2024-11-16 19:29:21,696 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-11-16 19:29:21,696 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-16 19:29:21,696 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-16 19:29:21,698 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 19:29:21,774 INFO L256 CfgBuilder]: Building ICFG [2024-11-16 19:29:21,776 INFO L286 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-16 19:29:21,927 INFO L303 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2024-11-16 19:29:21,927 INFO L307 CfgBuilder]: Performing block encoding [2024-11-16 19:29:22,052 INFO L331 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-16 19:29:22,052 INFO L336 CfgBuilder]: Removed 0 assume(true) statements. [2024-11-16 19:29:22,052 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 16.11 07:29:22 BoogieIcfgContainer [2024-11-16 19:29:22,052 INFO L131 PluginConnector]: ------------------------ END IcfgBuilder---------------------------- [2024-11-16 19:29:22,054 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-16 19:29:22,055 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-16 19:29:22,058 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-16 19:29:22,059 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 16.11 07:29:21" (1/3) ... [2024-11-16 19:29:22,059 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@14682554 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.11 07:29:22, skipping insertion in model container [2024-11-16 19:29:22,060 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:29:21" (2/3) ... [2024-11-16 19:29:22,060 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@14682554 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.11 07:29:22, skipping insertion in model container [2024-11-16 19:29:22,061 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 16.11 07:29:22" (3/3) ... [2024-11-16 19:29:22,062 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-figure1.wvr.c [2024-11-16 19:29:22,075 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-16 19:29:22,075 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-11-16 19:29:22,075 INFO L489 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-11-16 19:29:22,124 INFO L143 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2024-11-16 19:29:22,158 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 31 places, 28 transitions, 70 flow [2024-11-16 19:29:22,182 INFO L124 PetriNetUnfolderBase]: 4/26 cut-off events. [2024-11-16 19:29:22,182 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-11-16 19:29:22,185 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35 conditions, 26 events. 4/26 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 41 event pairs, 0 based on Foata normal form. 0/21 useless extension candidates. Maximal degree in co-relation 21. Up to 2 conditions per place. [2024-11-16 19:29:22,185 INFO L82 GeneralOperation]: Start removeDead. Operand has 31 places, 28 transitions, 70 flow [2024-11-16 19:29:22,188 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 28 places, 25 transitions, 62 flow [2024-11-16 19:29:22,196 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-16 19:29:22,202 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;@5be040bc, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-16 19:29:22,202 INFO L334 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2024-11-16 19:29:22,212 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-11-16 19:29:22,212 INFO L124 PetriNetUnfolderBase]: 4/24 cut-off events. [2024-11-16 19:29:22,212 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-11-16 19:29:22,212 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-16 19:29:22,213 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-16 19:29:22,213 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 19:29:22,220 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-16 19:29:22,221 INFO L85 PathProgramCache]: Analyzing trace with hash -709866742, now seen corresponding path program 1 times [2024-11-16 19:29:22,229 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-16 19:29:22,230 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1326560252] [2024-11-16 19:29:22,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 19:29:22,231 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-16 19:29:22,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 19:29:22,382 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 19:29:22,382 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-16 19:29:22,383 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1326560252] [2024-11-16 19:29:22,384 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1326560252] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-16 19:29:22,384 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-16 19:29:22,384 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-16 19:29:22,386 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [93680618] [2024-11-16 19:29:22,387 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-16 19:29:22,394 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2024-11-16 19:29:22,399 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-16 19:29:22,425 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2024-11-16 19:29:22,427 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-11-16 19:29:22,428 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 28 [2024-11-16 19:29:22,431 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 28 places, 25 transitions, 62 flow. Second operand has 2 states, 2 states have (on average 15.0) internal successors, (30), 2 states have internal predecessors, (30), 0 states have call successors, (0), 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 19:29:22,431 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-16 19:29:22,431 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 28 [2024-11-16 19:29:22,432 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-16 19:29:22,516 INFO L124 PetriNetUnfolderBase]: 74/150 cut-off events. [2024-11-16 19:29:22,520 INFO L125 PetriNetUnfolderBase]: For 14/14 co-relation queries the response was YES. [2024-11-16 19:29:22,522 INFO L83 FinitePrefix]: Finished finitePrefix Result has 300 conditions, 150 events. 74/150 cut-off events. For 14/14 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 553 event pairs, 53 based on Foata normal form. 21/165 useless extension candidates. Maximal degree in co-relation 259. Up to 131 conditions per place. [2024-11-16 19:29:22,524 INFO L140 encePairwiseOnDemand]: 26/28 looper letters, 17 selfloop transitions, 0 changer transitions 0/23 dead transitions. [2024-11-16 19:29:22,524 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 29 places, 23 transitions, 92 flow [2024-11-16 19:29:22,528 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2024-11-16 19:29:22,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2024-11-16 19:29:22,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 35 transitions. [2024-11-16 19:29:22,536 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.625 [2024-11-16 19:29:22,538 INFO L175 Difference]: Start difference. First operand has 28 places, 25 transitions, 62 flow. Second operand 2 states and 35 transitions. [2024-11-16 19:29:22,539 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 29 places, 23 transitions, 92 flow [2024-11-16 19:29:22,569 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 25 places, 23 transitions, 84 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-11-16 19:29:22,571 INFO L231 Difference]: Finished difference. Result has 25 places, 23 transitions, 50 flow [2024-11-16 19:29:22,622 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=50, PETRI_DIFFERENCE_MINUEND_PLACES=24, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=23, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=50, PETRI_PLACES=25, PETRI_TRANSITIONS=23} [2024-11-16 19:29:22,627 INFO L277 CegarLoopForPetriNet]: 28 programPoint places, -3 predicate places. [2024-11-16 19:29:22,628 INFO L471 AbstractCegarLoop]: Abstraction has has 25 places, 23 transitions, 50 flow [2024-11-16 19:29:22,629 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 15.0) internal successors, (30), 2 states have internal predecessors, (30), 0 states have call successors, (0), 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 19:29:22,629 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-16 19:29:22,630 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 19:29:22,630 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-16 19:29:22,630 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 19:29:22,631 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-16 19:29:22,632 INFO L85 PathProgramCache]: Analyzing trace with hash -143131856, now seen corresponding path program 1 times [2024-11-16 19:29:22,632 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-16 19:29:22,632 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1795095987] [2024-11-16 19:29:22,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 19:29:22,633 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-16 19:29:22,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 19:29:22,724 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 19:29:22,724 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-16 19:29:22,725 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1795095987] [2024-11-16 19:29:22,725 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1795095987] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-16 19:29:22,725 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-16 19:29:22,726 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-16 19:29:22,726 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1141422610] [2024-11-16 19:29:22,726 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-16 19:29:22,728 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-16 19:29:22,728 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-16 19:29:22,729 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-16 19:29:22,729 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-16 19:29:22,729 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 28 [2024-11-16 19:29:22,730 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 25 places, 23 transitions, 50 flow. Second operand has 3 states, 3 states have (on average 12.0) internal successors, (36), 3 states have internal predecessors, (36), 0 states have call successors, (0), 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 19:29:22,730 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-16 19:29:22,730 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 28 [2024-11-16 19:29:22,730 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-16 19:29:22,821 INFO L124 PetriNetUnfolderBase]: 86/198 cut-off events. [2024-11-16 19:29:22,821 INFO L125 PetriNetUnfolderBase]: For 4/4 co-relation queries the response was YES. [2024-11-16 19:29:22,822 INFO L83 FinitePrefix]: Finished finitePrefix Result has 366 conditions, 198 events. 86/198 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 791 event pairs, 32 based on Foata normal form. 8/192 useless extension candidates. Maximal degree in co-relation 363. Up to 108 conditions per place. [2024-11-16 19:29:22,823 INFO L140 encePairwiseOnDemand]: 24/28 looper letters, 21 selfloop transitions, 2 changer transitions 3/32 dead transitions. [2024-11-16 19:29:22,823 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 27 places, 32 transitions, 123 flow [2024-11-16 19:29:22,824 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-16 19:29:22,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-16 19:29:22,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 52 transitions. [2024-11-16 19:29:22,826 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6190476190476191 [2024-11-16 19:29:22,826 INFO L175 Difference]: Start difference. First operand has 25 places, 23 transitions, 50 flow. Second operand 3 states and 52 transitions. [2024-11-16 19:29:22,826 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 27 places, 32 transitions, 123 flow [2024-11-16 19:29:22,827 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 27 places, 32 transitions, 123 flow, removed 0 selfloop flow, removed 0 redundant places. [2024-11-16 19:29:22,829 INFO L231 Difference]: Finished difference. Result has 28 places, 24 transitions, 64 flow [2024-11-16 19:29:22,830 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=50, PETRI_DIFFERENCE_MINUEND_PLACES=25, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=23, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=64, PETRI_PLACES=28, PETRI_TRANSITIONS=24} [2024-11-16 19:29:22,830 INFO L277 CegarLoopForPetriNet]: 28 programPoint places, 0 predicate places. [2024-11-16 19:29:22,830 INFO L471 AbstractCegarLoop]: Abstraction has has 28 places, 24 transitions, 64 flow [2024-11-16 19:29:22,831 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 12.0) internal successors, (36), 3 states have internal predecessors, (36), 0 states have call successors, (0), 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 19:29:22,831 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-16 19:29:22,831 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] [2024-11-16 19:29:22,831 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-16 19:29:22,831 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 19:29:22,832 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-16 19:29:22,832 INFO L85 PathProgramCache]: Analyzing trace with hash 1260616708, now seen corresponding path program 1 times [2024-11-16 19:29:22,832 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-16 19:29:22,832 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1387355727] [2024-11-16 19:29:22,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 19:29:22,833 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-16 19:29:22,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 19:29:23,039 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 19:29:23,041 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-16 19:29:23,042 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1387355727] [2024-11-16 19:29:23,042 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1387355727] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-16 19:29:23,044 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-16 19:29:23,044 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-16 19:29:23,044 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1381093984] [2024-11-16 19:29:23,044 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-16 19:29:23,046 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-16 19:29:23,046 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-16 19:29:23,047 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-16 19:29:23,047 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2024-11-16 19:29:23,059 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 28 [2024-11-16 19:29:23,059 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 28 places, 24 transitions, 64 flow. Second operand has 5 states, 5 states have (on average 8.4) internal successors, (42), 5 states have internal predecessors, (42), 0 states have call successors, (0), 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 19:29:23,060 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-16 19:29:23,060 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 28 [2024-11-16 19:29:23,061 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-16 19:29:23,236 INFO L124 PetriNetUnfolderBase]: 227/435 cut-off events. [2024-11-16 19:29:23,236 INFO L125 PetriNetUnfolderBase]: For 29/29 co-relation queries the response was YES. [2024-11-16 19:29:23,238 INFO L83 FinitePrefix]: Finished finitePrefix Result has 916 conditions, 435 events. 227/435 cut-off events. For 29/29 co-relation queries the response was YES. Maximal size of possible extension queue 33. Compared 1986 event pairs, 91 based on Foata normal form. 0/408 useless extension candidates. Maximal degree in co-relation 911. Up to 257 conditions per place. [2024-11-16 19:29:23,243 INFO L140 encePairwiseOnDemand]: 19/28 looper letters, 38 selfloop transitions, 9 changer transitions 12/62 dead transitions. [2024-11-16 19:29:23,243 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 33 places, 62 transitions, 273 flow [2024-11-16 19:29:23,244 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-16 19:29:23,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-16 19:29:23,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 91 transitions. [2024-11-16 19:29:23,245 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5416666666666666 [2024-11-16 19:29:23,245 INFO L175 Difference]: Start difference. First operand has 28 places, 24 transitions, 64 flow. Second operand 6 states and 91 transitions. [2024-11-16 19:29:23,245 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 33 places, 62 transitions, 273 flow [2024-11-16 19:29:23,246 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 32 places, 62 transitions, 268 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-16 19:29:23,248 INFO L231 Difference]: Finished difference. Result has 36 places, 32 transitions, 133 flow [2024-11-16 19:29:23,249 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=62, PETRI_DIFFERENCE_MINUEND_PLACES=27, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=24, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=18, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=133, PETRI_PLACES=36, PETRI_TRANSITIONS=32} [2024-11-16 19:29:23,250 INFO L277 CegarLoopForPetriNet]: 28 programPoint places, 8 predicate places. [2024-11-16 19:29:23,251 INFO L471 AbstractCegarLoop]: Abstraction has has 36 places, 32 transitions, 133 flow [2024-11-16 19:29:23,251 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 8.4) internal successors, (42), 5 states have internal predecessors, (42), 0 states have call successors, (0), 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 19:29:23,251 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-16 19:29:23,251 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] [2024-11-16 19:29:23,252 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-11-16 19:29:23,252 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 19:29:23,253 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-16 19:29:23,253 INFO L85 PathProgramCache]: Analyzing trace with hash -1194060656, now seen corresponding path program 2 times [2024-11-16 19:29:23,253 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-16 19:29:23,254 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1394674267] [2024-11-16 19:29:23,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 19:29:23,254 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-16 19:29:23,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 19:29:23,375 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-16 19:29:23,376 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-16 19:29:23,376 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1394674267] [2024-11-16 19:29:23,378 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1394674267] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-16 19:29:23,378 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [665386535] [2024-11-16 19:29:23,378 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-16 19:29:23,385 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-16 19:29:23,386 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-16 19:29:23,388 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 19:29:23,390 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 19:29:23,446 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-16 19:29:23,447 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-16 19:29:23,448 INFO L255 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 4 conjuncts are in the unsatisfiable core [2024-11-16 19:29:23,452 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-16 19:29:23,512 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-16 19:29:23,512 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-16 19:29:23,552 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-16 19:29:23,553 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [665386535] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-16 19:29:23,553 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-16 19:29:23,553 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 9 [2024-11-16 19:29:23,553 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [465696709] [2024-11-16 19:29:23,553 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-16 19:29:23,554 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-11-16 19:29:23,554 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-16 19:29:23,555 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-11-16 19:29:23,555 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2024-11-16 19:29:23,571 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 28 [2024-11-16 19:29:23,572 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 36 places, 32 transitions, 133 flow. Second operand has 9 states, 9 states have (on average 7.777777777777778) internal successors, (70), 9 states have internal predecessors, (70), 0 states have call successors, (0), 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 19:29:23,572 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-16 19:29:23,572 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 28 [2024-11-16 19:29:23,572 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-16 19:29:23,875 INFO L124 PetriNetUnfolderBase]: 250/477 cut-off events. [2024-11-16 19:29:23,876 INFO L125 PetriNetUnfolderBase]: For 387/387 co-relation queries the response was YES. [2024-11-16 19:29:23,879 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1382 conditions, 477 events. 250/477 cut-off events. For 387/387 co-relation queries the response was YES. Maximal size of possible extension queue 36. Compared 2154 event pairs, 9 based on Foata normal form. 15/492 useless extension candidates. Maximal degree in co-relation 1373. Up to 112 conditions per place. [2024-11-16 19:29:23,884 INFO L140 encePairwiseOnDemand]: 20/28 looper letters, 65 selfloop transitions, 25 changer transitions 3/96 dead transitions. [2024-11-16 19:29:23,884 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 96 transitions, 562 flow [2024-11-16 19:29:23,885 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-11-16 19:29:23,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-11-16 19:29:23,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 147 transitions. [2024-11-16 19:29:23,888 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4375 [2024-11-16 19:29:23,889 INFO L175 Difference]: Start difference. First operand has 36 places, 32 transitions, 133 flow. Second operand 12 states and 147 transitions. [2024-11-16 19:29:23,889 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 96 transitions, 562 flow [2024-11-16 19:29:23,894 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 96 transitions, 560 flow, removed 1 selfloop flow, removed 0 redundant places. [2024-11-16 19:29:23,896 INFO L231 Difference]: Finished difference. Result has 54 places, 49 transitions, 320 flow [2024-11-16 19:29:23,897 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=131, PETRI_DIFFERENCE_MINUEND_PLACES=36, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=32, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=20, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=320, PETRI_PLACES=54, PETRI_TRANSITIONS=49} [2024-11-16 19:29:23,898 INFO L277 CegarLoopForPetriNet]: 28 programPoint places, 26 predicate places. [2024-11-16 19:29:23,899 INFO L471 AbstractCegarLoop]: Abstraction has has 54 places, 49 transitions, 320 flow [2024-11-16 19:29:23,899 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 7.777777777777778) internal successors, (70), 9 states have internal predecessors, (70), 0 states have call successors, (0), 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 19:29:23,899 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-16 19:29:23,899 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] [2024-11-16 19:29:23,918 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2024-11-16 19:29:24,100 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-16 19:29:24,101 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 19:29:24,101 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-16 19:29:24,101 INFO L85 PathProgramCache]: Analyzing trace with hash -375299726, now seen corresponding path program 3 times [2024-11-16 19:29:24,102 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-16 19:29:24,102 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1397192069] [2024-11-16 19:29:24,102 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 19:29:24,102 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-16 19:29:24,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 19:29:24,190 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 19:29:24,191 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-16 19:29:24,191 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1397192069] [2024-11-16 19:29:24,191 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1397192069] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-16 19:29:24,191 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-16 19:29:24,191 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-16 19:29:24,191 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2028726678] [2024-11-16 19:29:24,192 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-16 19:29:24,192 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-16 19:29:24,192 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-16 19:29:24,193 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-16 19:29:24,193 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-16 19:29:24,200 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 28 [2024-11-16 19:29:24,200 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 49 transitions, 320 flow. Second operand has 5 states, 5 states have (on average 9.2) internal successors, (46), 5 states have internal predecessors, (46), 0 states have call successors, (0), 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 19:29:24,200 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-16 19:29:24,200 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 28 [2024-11-16 19:29:24,200 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-16 19:29:24,368 INFO L124 PetriNetUnfolderBase]: 314/606 cut-off events. [2024-11-16 19:29:24,368 INFO L125 PetriNetUnfolderBase]: For 1498/1502 co-relation queries the response was YES. [2024-11-16 19:29:24,371 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2169 conditions, 606 events. 314/606 cut-off events. For 1498/1502 co-relation queries the response was YES. Maximal size of possible extension queue 36. Compared 2789 event pairs, 95 based on Foata normal form. 4/605 useless extension candidates. Maximal degree in co-relation 2152. Up to 229 conditions per place. [2024-11-16 19:29:24,374 INFO L140 encePairwiseOnDemand]: 22/28 looper letters, 70 selfloop transitions, 16 changer transitions 5/95 dead transitions. [2024-11-16 19:29:24,374 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 95 transitions, 772 flow [2024-11-16 19:29:24,375 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-16 19:29:24,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-11-16 19:29:24,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 94 transitions. [2024-11-16 19:29:24,378 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.47959183673469385 [2024-11-16 19:29:24,378 INFO L175 Difference]: Start difference. First operand has 54 places, 49 transitions, 320 flow. Second operand 7 states and 94 transitions. [2024-11-16 19:29:24,378 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 95 transitions, 772 flow [2024-11-16 19:29:24,389 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 95 transitions, 754 flow, removed 9 selfloop flow, removed 0 redundant places. [2024-11-16 19:29:24,391 INFO L231 Difference]: Finished difference. Result has 65 places, 54 transitions, 409 flow [2024-11-16 19:29:24,393 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=306, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=409, PETRI_PLACES=65, PETRI_TRANSITIONS=54} [2024-11-16 19:29:24,394 INFO L277 CegarLoopForPetriNet]: 28 programPoint places, 37 predicate places. [2024-11-16 19:29:24,396 INFO L471 AbstractCegarLoop]: Abstraction has has 65 places, 54 transitions, 409 flow [2024-11-16 19:29:24,396 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 9.2) internal successors, (46), 5 states have internal predecessors, (46), 0 states have call successors, (0), 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 19:29:24,396 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-16 19:29:24,397 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] [2024-11-16 19:29:24,397 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-11-16 19:29:24,397 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 19:29:24,398 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-16 19:29:24,398 INFO L85 PathProgramCache]: Analyzing trace with hash 651851792, now seen corresponding path program 4 times [2024-11-16 19:29:24,401 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-16 19:29:24,401 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1684568480] [2024-11-16 19:29:24,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 19:29:24,401 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-16 19:29:24,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 19:29:24,517 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-16 19:29:24,519 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-16 19:29:24,519 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1684568480] [2024-11-16 19:29:24,519 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1684568480] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-16 19:29:24,519 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [713665556] [2024-11-16 19:29:24,519 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-16 19:29:24,520 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-16 19:29:24,520 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-16 19:29:24,522 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 19:29:24,523 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 19:29:24,571 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-16 19:29:24,571 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-16 19:29:24,572 INFO L255 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 4 conjuncts are in the unsatisfiable core [2024-11-16 19:29:24,574 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-16 19:29:24,675 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-16 19:29:24,675 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-16 19:29:24,729 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-16 19:29:24,730 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [713665556] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-16 19:29:24,730 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-16 19:29:24,730 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 11 [2024-11-16 19:29:24,730 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1065238731] [2024-11-16 19:29:24,730 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-16 19:29:24,731 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-11-16 19:29:24,731 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-16 19:29:24,731 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-11-16 19:29:24,732 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=73, Unknown=0, NotChecked=0, Total=110 [2024-11-16 19:29:24,739 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 28 [2024-11-16 19:29:24,739 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 54 transitions, 409 flow. Second operand has 11 states, 11 states have (on average 8.363636363636363) internal successors, (92), 11 states have internal predecessors, (92), 0 states have call successors, (0), 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 19:29:24,740 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-16 19:29:24,740 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 28 [2024-11-16 19:29:24,740 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-16 19:29:25,168 INFO L124 PetriNetUnfolderBase]: 469/870 cut-off events. [2024-11-16 19:29:25,168 INFO L125 PetriNetUnfolderBase]: For 2974/2978 co-relation queries the response was YES. [2024-11-16 19:29:25,172 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3358 conditions, 870 events. 469/870 cut-off events. For 2974/2978 co-relation queries the response was YES. Maximal size of possible extension queue 65. Compared 4320 event pairs, 35 based on Foata normal form. 15/885 useless extension candidates. Maximal degree in co-relation 3335. Up to 200 conditions per place. [2024-11-16 19:29:25,176 INFO L140 encePairwiseOnDemand]: 18/28 looper letters, 83 selfloop transitions, 47 changer transitions 4/137 dead transitions. [2024-11-16 19:29:25,177 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 137 transitions, 1145 flow [2024-11-16 19:29:25,177 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-11-16 19:29:25,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2024-11-16 19:29:25,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 196 transitions. [2024-11-16 19:29:25,178 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4375 [2024-11-16 19:29:25,178 INFO L175 Difference]: Start difference. First operand has 65 places, 54 transitions, 409 flow. Second operand 16 states and 196 transitions. [2024-11-16 19:29:25,179 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 137 transitions, 1145 flow [2024-11-16 19:29:25,184 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 137 transitions, 1100 flow, removed 13 selfloop flow, removed 3 redundant places. [2024-11-16 19:29:25,186 INFO L231 Difference]: Finished difference. Result has 84 places, 76 transitions, 754 flow [2024-11-16 19:29:25,187 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=369, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=52, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=754, PETRI_PLACES=84, PETRI_TRANSITIONS=76} [2024-11-16 19:29:25,187 INFO L277 CegarLoopForPetriNet]: 28 programPoint places, 56 predicate places. [2024-11-16 19:29:25,188 INFO L471 AbstractCegarLoop]: Abstraction has has 84 places, 76 transitions, 754 flow [2024-11-16 19:29:25,188 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.363636363636363) internal successors, (92), 11 states have internal predecessors, (92), 0 states have call successors, (0), 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 19:29:25,188 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-16 19:29:25,188 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] [2024-11-16 19:29:25,205 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 19:29:25,392 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,SelfDestructingSolverStorable5 [2024-11-16 19:29:25,393 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 19:29:25,393 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-16 19:29:25,393 INFO L85 PathProgramCache]: Analyzing trace with hash -2096563180, now seen corresponding path program 5 times [2024-11-16 19:29:25,394 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-16 19:29:25,394 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [317424998] [2024-11-16 19:29:25,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 19:29:25,394 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-16 19:29:25,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 19:29:25,484 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-16 19:29:25,484 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-16 19:29:25,484 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [317424998] [2024-11-16 19:29:25,485 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [317424998] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-16 19:29:25,485 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2118986814] [2024-11-16 19:29:25,485 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-16 19:29:25,485 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-16 19:29:25,485 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-16 19:29:25,487 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 19:29:25,488 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 19:29:25,547 INFO L227 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-16 19:29:25,548 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-16 19:29:25,548 INFO L255 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 4 conjuncts are in the unsatisfiable core [2024-11-16 19:29:25,549 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-16 19:29:25,610 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-16 19:29:25,611 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-16 19:29:25,650 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-16 19:29:25,650 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2118986814] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-16 19:29:25,651 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-16 19:29:25,651 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 11 [2024-11-16 19:29:25,651 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1060346867] [2024-11-16 19:29:25,651 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-16 19:29:25,661 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-11-16 19:29:25,662 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-16 19:29:25,663 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-11-16 19:29:25,663 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2024-11-16 19:29:25,762 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 28 [2024-11-16 19:29:25,762 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 84 places, 76 transitions, 754 flow. Second operand has 11 states, 11 states have (on average 7.909090909090909) internal successors, (87), 11 states have internal predecessors, (87), 0 states have call successors, (0), 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 19:29:25,762 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-16 19:29:25,762 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 28 [2024-11-16 19:29:25,763 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-16 19:29:26,023 INFO L124 PetriNetUnfolderBase]: 466/867 cut-off events. [2024-11-16 19:29:26,023 INFO L125 PetriNetUnfolderBase]: For 5000/5000 co-relation queries the response was YES. [2024-11-16 19:29:26,026 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3805 conditions, 867 events. 466/867 cut-off events. For 5000/5000 co-relation queries the response was YES. Maximal size of possible extension queue 67. Compared 4235 event pairs, 98 based on Foata normal form. 15/881 useless extension candidates. Maximal degree in co-relation 3776. Up to 283 conditions per place. [2024-11-16 19:29:26,031 INFO L140 encePairwiseOnDemand]: 18/28 looper letters, 70 selfloop transitions, 56 changer transitions 2/131 dead transitions. [2024-11-16 19:29:26,031 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 90 places, 131 transitions, 1428 flow [2024-11-16 19:29:26,032 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-16 19:29:26,032 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-11-16 19:29:26,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 122 transitions. [2024-11-16 19:29:26,033 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.48412698412698413 [2024-11-16 19:29:26,033 INFO L175 Difference]: Start difference. First operand has 84 places, 76 transitions, 754 flow. Second operand 9 states and 122 transitions. [2024-11-16 19:29:26,033 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 90 places, 131 transitions, 1428 flow [2024-11-16 19:29:26,046 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 86 places, 131 transitions, 1294 flow, removed 45 selfloop flow, removed 4 redundant places. [2024-11-16 19:29:26,050 INFO L231 Difference]: Finished difference. Result has 93 places, 98 transitions, 1122 flow [2024-11-16 19:29:26,050 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=644, PETRI_DIFFERENCE_MINUEND_PLACES=78, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=76, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1122, PETRI_PLACES=93, PETRI_TRANSITIONS=98} [2024-11-16 19:29:26,051 INFO L277 CegarLoopForPetriNet]: 28 programPoint places, 65 predicate places. [2024-11-16 19:29:26,051 INFO L471 AbstractCegarLoop]: Abstraction has has 93 places, 98 transitions, 1122 flow [2024-11-16 19:29:26,052 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 7.909090909090909) internal successors, (87), 11 states have internal predecessors, (87), 0 states have call successors, (0), 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 19:29:26,052 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-16 19:29:26,052 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] [2024-11-16 19:29:26,069 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-11-16 19:29:26,252 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-16 19:29:26,253 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 19:29:26,253 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-16 19:29:26,253 INFO L85 PathProgramCache]: Analyzing trace with hash -2077332804, now seen corresponding path program 6 times [2024-11-16 19:29:26,254 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-16 19:29:26,254 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2009344600] [2024-11-16 19:29:26,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 19:29:26,254 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-16 19:29:26,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 19:29:26,340 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 19:29:26,344 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-16 19:29:26,344 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2009344600] [2024-11-16 19:29:26,344 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2009344600] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-16 19:29:26,345 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-16 19:29:26,345 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-16 19:29:26,345 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2038005176] [2024-11-16 19:29:26,345 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-16 19:29:26,345 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-16 19:29:26,345 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-16 19:29:26,346 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-16 19:29:26,346 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-16 19:29:26,357 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 28 [2024-11-16 19:29:26,358 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 93 places, 98 transitions, 1122 flow. Second operand has 5 states, 5 states have (on average 8.4) internal successors, (42), 5 states have internal predecessors, (42), 0 states have call successors, (0), 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 19:29:26,358 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-16 19:29:26,358 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 28 [2024-11-16 19:29:26,358 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-16 19:29:26,574 INFO L124 PetriNetUnfolderBase]: 432/791 cut-off events. [2024-11-16 19:29:26,575 INFO L125 PetriNetUnfolderBase]: For 5428/5428 co-relation queries the response was YES. [2024-11-16 19:29:26,578 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3778 conditions, 791 events. 432/791 cut-off events. For 5428/5428 co-relation queries the response was YES. Maximal size of possible extension queue 62. Compared 3710 event pairs, 141 based on Foata normal form. 4/794 useless extension candidates. Maximal degree in co-relation 3744. Up to 419 conditions per place. [2024-11-16 19:29:26,582 INFO L140 encePairwiseOnDemand]: 21/28 looper letters, 75 selfloop transitions, 26 changer transitions 5/109 dead transitions. [2024-11-16 19:29:26,582 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 98 places, 109 transitions, 1373 flow [2024-11-16 19:29:26,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-16 19:29:26,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-16 19:29:26,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 75 transitions. [2024-11-16 19:29:26,583 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.44642857142857145 [2024-11-16 19:29:26,584 INFO L175 Difference]: Start difference. First operand has 93 places, 98 transitions, 1122 flow. Second operand 6 states and 75 transitions. [2024-11-16 19:29:26,584 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 98 places, 109 transitions, 1373 flow [2024-11-16 19:29:26,598 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 95 places, 109 transitions, 1315 flow, removed 13 selfloop flow, removed 3 redundant places. [2024-11-16 19:29:26,600 INFO L231 Difference]: Finished difference. Result has 97 places, 93 transitions, 1053 flow [2024-11-16 19:29:26,600 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=1028, PETRI_DIFFERENCE_MINUEND_PLACES=90, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=95, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=69, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1053, PETRI_PLACES=97, PETRI_TRANSITIONS=93} [2024-11-16 19:29:26,601 INFO L277 CegarLoopForPetriNet]: 28 programPoint places, 69 predicate places. [2024-11-16 19:29:26,601 INFO L471 AbstractCegarLoop]: Abstraction has has 97 places, 93 transitions, 1053 flow [2024-11-16 19:29:26,601 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 8.4) internal successors, (42), 5 states have internal predecessors, (42), 0 states have call successors, (0), 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 19:29:26,601 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-16 19:29:26,601 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] [2024-11-16 19:29:26,601 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-11-16 19:29:26,601 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 19:29:26,602 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-16 19:29:26,602 INFO L85 PathProgramCache]: Analyzing trace with hash 1890462148, now seen corresponding path program 1 times [2024-11-16 19:29:26,602 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-16 19:29:26,602 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1002398961] [2024-11-16 19:29:26,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 19:29:26,602 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-16 19:29:26,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 19:29:26,676 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-16 19:29:26,677 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-16 19:29:26,677 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1002398961] [2024-11-16 19:29:26,677 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1002398961] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-16 19:29:26,677 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [975467990] [2024-11-16 19:29:26,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 19:29:26,678 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-16 19:29:26,678 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-16 19:29:26,679 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 19:29:26,681 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 19:29:26,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 19:29:26,726 INFO L255 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-11-16 19:29:26,727 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-16 19:29:26,766 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-16 19:29:26,767 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-16 19:29:26,767 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [975467990] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-16 19:29:26,767 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-16 19:29:26,767 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [3] total 5 [2024-11-16 19:29:26,768 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1998628582] [2024-11-16 19:29:26,768 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-16 19:29:26,768 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-16 19:29:26,768 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-16 19:29:26,769 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-16 19:29:26,769 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-11-16 19:29:26,769 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 28 [2024-11-16 19:29:26,769 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 97 places, 93 transitions, 1053 flow. Second operand has 6 states, 6 states have (on average 10.833333333333334) internal successors, (65), 6 states have internal predecessors, (65), 0 states have call successors, (0), 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 19:29:26,769 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-16 19:29:26,770 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 28 [2024-11-16 19:29:26,770 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-16 19:29:26,947 INFO L124 PetriNetUnfolderBase]: 614/1234 cut-off events. [2024-11-16 19:29:26,948 INFO L125 PetriNetUnfolderBase]: For 9192/9229 co-relation queries the response was YES. [2024-11-16 19:29:26,952 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5900 conditions, 1234 events. 614/1234 cut-off events. For 9192/9229 co-relation queries the response was YES. Maximal size of possible extension queue 77. Compared 7012 event pairs, 90 based on Foata normal form. 26/1225 useless extension candidates. Maximal degree in co-relation 5866. Up to 484 conditions per place. [2024-11-16 19:29:26,958 INFO L140 encePairwiseOnDemand]: 23/28 looper letters, 161 selfloop transitions, 5 changer transitions 2/182 dead transitions. [2024-11-16 19:29:26,959 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 96 places, 182 transitions, 2470 flow [2024-11-16 19:29:26,959 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-16 19:29:26,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-16 19:29:26,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 76 transitions. [2024-11-16 19:29:26,960 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6785714285714286 [2024-11-16 19:29:26,960 INFO L175 Difference]: Start difference. First operand has 97 places, 93 transitions, 1053 flow. Second operand 4 states and 76 transitions. [2024-11-16 19:29:26,960 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 96 places, 182 transitions, 2470 flow [2024-11-16 19:29:26,980 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 85 places, 182 transitions, 2179 flow, removed 8 selfloop flow, removed 11 redundant places. [2024-11-16 19:29:26,982 INFO L231 Difference]: Finished difference. Result has 87 places, 93 transitions, 927 flow [2024-11-16 19:29:26,982 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=889, PETRI_DIFFERENCE_MINUEND_PLACES=82, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=90, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=86, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=927, PETRI_PLACES=87, PETRI_TRANSITIONS=93} [2024-11-16 19:29:26,983 INFO L277 CegarLoopForPetriNet]: 28 programPoint places, 59 predicate places. [2024-11-16 19:29:26,983 INFO L471 AbstractCegarLoop]: Abstraction has has 87 places, 93 transitions, 927 flow [2024-11-16 19:29:26,983 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 10.833333333333334) internal successors, (65), 6 states have internal predecessors, (65), 0 states have call successors, (0), 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 19:29:26,984 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-16 19:29:26,984 INFO L204 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-16 19:29:27,000 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 19:29:27,187 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-16 19:29:27,188 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 19:29:27,188 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-16 19:29:27,188 INFO L85 PathProgramCache]: Analyzing trace with hash -1798190042, now seen corresponding path program 2 times [2024-11-16 19:29:27,188 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-16 19:29:27,188 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2039599670] [2024-11-16 19:29:27,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 19:29:27,189 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-16 19:29:27,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 19:29:27,266 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-16 19:29:27,267 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-16 19:29:27,267 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2039599670] [2024-11-16 19:29:27,267 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2039599670] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-16 19:29:27,267 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [635050832] [2024-11-16 19:29:27,267 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-16 19:29:27,268 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-16 19:29:27,268 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-16 19:29:27,269 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 19:29:27,271 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 19:29:27,319 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-16 19:29:27,319 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-16 19:29:27,320 INFO L255 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-11-16 19:29:27,321 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-16 19:29:27,429 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-16 19:29:27,430 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-16 19:29:27,515 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-16 19:29:27,516 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [635050832] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-16 19:29:27,516 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-16 19:29:27,516 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 15 [2024-11-16 19:29:27,516 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [375336374] [2024-11-16 19:29:27,517 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-16 19:29:27,517 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-11-16 19:29:27,517 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-16 19:29:27,518 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-11-16 19:29:27,518 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2024-11-16 19:29:27,540 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 28 [2024-11-16 19:29:27,541 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 87 places, 93 transitions, 927 flow. Second operand has 15 states, 15 states have (on average 8.133333333333333) internal successors, (122), 15 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 19:29:27,541 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-16 19:29:27,541 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 28 [2024-11-16 19:29:27,541 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-16 19:29:28,427 INFO L124 PetriNetUnfolderBase]: 1604/2889 cut-off events. [2024-11-16 19:29:28,427 INFO L125 PetriNetUnfolderBase]: For 15652/15652 co-relation queries the response was YES. [2024-11-16 19:29:28,436 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13478 conditions, 2889 events. 1604/2889 cut-off events. For 15652/15652 co-relation queries the response was YES. Maximal size of possible extension queue 148. Compared 17249 event pairs, 70 based on Foata normal form. 90/2979 useless extension candidates. Maximal degree in co-relation 13449. Up to 489 conditions per place. [2024-11-16 19:29:28,451 INFO L140 encePairwiseOnDemand]: 18/28 looper letters, 172 selfloop transitions, 134 changer transitions 19/328 dead transitions. [2024-11-16 19:29:28,451 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 116 places, 328 transitions, 3440 flow [2024-11-16 19:29:28,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2024-11-16 19:29:28,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2024-11-16 19:29:28,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 372 transitions. [2024-11-16 19:29:28,453 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.44285714285714284 [2024-11-16 19:29:28,453 INFO L175 Difference]: Start difference. First operand has 87 places, 93 transitions, 927 flow. Second operand 30 states and 372 transitions. [2024-11-16 19:29:28,453 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 116 places, 328 transitions, 3440 flow [2024-11-16 19:29:28,486 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 116 places, 328 transitions, 3440 flow, removed 0 selfloop flow, removed 0 redundant places. [2024-11-16 19:29:28,491 INFO L231 Difference]: Finished difference. Result has 134 places, 172 transitions, 2277 flow [2024-11-16 19:29:28,491 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=927, PETRI_DIFFERENCE_MINUEND_PLACES=87, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=93, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=59, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=30, PETRI_FLOW=2277, PETRI_PLACES=134, PETRI_TRANSITIONS=172} [2024-11-16 19:29:28,492 INFO L277 CegarLoopForPetriNet]: 28 programPoint places, 106 predicate places. [2024-11-16 19:29:28,492 INFO L471 AbstractCegarLoop]: Abstraction has has 134 places, 172 transitions, 2277 flow [2024-11-16 19:29:28,492 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 8.133333333333333) internal successors, (122), 15 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 19:29:28,492 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-16 19:29:28,492 INFO L204 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-16 19:29:28,510 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-11-16 19:29:28,693 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,SelfDestructingSolverStorable9 [2024-11-16 19:29:28,694 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 19:29:28,694 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-16 19:29:28,695 INFO L85 PathProgramCache]: Analyzing trace with hash -14673226, now seen corresponding path program 3 times [2024-11-16 19:29:28,695 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-16 19:29:28,695 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1830789478] [2024-11-16 19:29:28,695 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 19:29:28,695 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-16 19:29:28,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 19:29:28,773 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-16 19:29:28,773 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-16 19:29:28,773 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1830789478] [2024-11-16 19:29:28,774 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1830789478] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-16 19:29:28,774 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1259628073] [2024-11-16 19:29:28,774 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-16 19:29:28,774 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-16 19:29:28,774 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-16 19:29:28,776 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 19:29:28,777 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 19:29:28,830 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2024-11-16 19:29:28,831 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-16 19:29:28,832 INFO L255 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-11-16 19:29:28,833 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-16 19:29:28,909 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-16 19:29:28,909 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-16 19:29:28,964 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-16 19:29:28,965 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1259628073] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-16 19:29:28,965 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-16 19:29:28,965 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 15 [2024-11-16 19:29:28,965 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1004155519] [2024-11-16 19:29:28,965 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-16 19:29:28,966 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-11-16 19:29:28,966 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-16 19:29:28,966 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-11-16 19:29:28,967 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=153, Unknown=0, NotChecked=0, Total=210 [2024-11-16 19:29:28,981 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 28 [2024-11-16 19:29:28,982 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 134 places, 172 transitions, 2277 flow. Second operand has 15 states, 15 states have (on average 7.733333333333333) internal successors, (116), 15 states have internal predecessors, (116), 0 states have call successors, (0), 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 19:29:28,982 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-16 19:29:28,982 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 28 [2024-11-16 19:29:28,982 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-16 19:29:30,459 INFO L124 PetriNetUnfolderBase]: 2554/4568 cut-off events. [2024-11-16 19:29:30,460 INFO L125 PetriNetUnfolderBase]: For 63350/63350 co-relation queries the response was YES. [2024-11-16 19:29:30,480 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27739 conditions, 4568 events. 2554/4568 cut-off events. For 63350/63350 co-relation queries the response was YES. Maximal size of possible extension queue 218. Compared 28894 event pairs, 189 based on Foata normal form. 44/4612 useless extension candidates. Maximal degree in co-relation 27692. Up to 814 conditions per place. [2024-11-16 19:29:30,509 INFO L140 encePairwiseOnDemand]: 18/28 looper letters, 212 selfloop transitions, 213 changer transitions 14/442 dead transitions. [2024-11-16 19:29:30,509 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 161 places, 442 transitions, 6292 flow [2024-11-16 19:29:30,510 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2024-11-16 19:29:30,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2024-11-16 19:29:30,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 337 transitions. [2024-11-16 19:29:30,511 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4298469387755102 [2024-11-16 19:29:30,511 INFO L175 Difference]: Start difference. First operand has 134 places, 172 transitions, 2277 flow. Second operand 28 states and 337 transitions. [2024-11-16 19:29:30,512 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 161 places, 442 transitions, 6292 flow [2024-11-16 19:29:30,748 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 156 places, 442 transitions, 5990 flow, removed 130 selfloop flow, removed 5 redundant places. [2024-11-16 19:29:30,754 INFO L231 Difference]: Finished difference. Result has 173 places, 303 transitions, 4717 flow [2024-11-16 19:29:30,755 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=2084, PETRI_DIFFERENCE_MINUEND_PLACES=129, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=170, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=99, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=28, PETRI_FLOW=4717, PETRI_PLACES=173, PETRI_TRANSITIONS=303} [2024-11-16 19:29:30,755 INFO L277 CegarLoopForPetriNet]: 28 programPoint places, 145 predicate places. [2024-11-16 19:29:30,755 INFO L471 AbstractCegarLoop]: Abstraction has has 173 places, 303 transitions, 4717 flow [2024-11-16 19:29:30,756 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 7.733333333333333) internal successors, (116), 15 states have internal predecessors, (116), 0 states have call successors, (0), 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 19:29:30,756 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-16 19:29:30,756 INFO L204 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-16 19:29:30,773 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 19:29:30,956 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-16 19:29:30,957 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 19:29:30,957 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-16 19:29:30,958 INFO L85 PathProgramCache]: Analyzing trace with hash -793211254, now seen corresponding path program 4 times [2024-11-16 19:29:30,958 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-16 19:29:30,958 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1924071386] [2024-11-16 19:29:30,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 19:29:30,958 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-16 19:29:30,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 19:29:31,060 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-16 19:29:31,060 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-16 19:29:31,061 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1924071386] [2024-11-16 19:29:31,061 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1924071386] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-16 19:29:31,061 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2130818259] [2024-11-16 19:29:31,061 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-16 19:29:31,061 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-16 19:29:31,061 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-16 19:29:31,063 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 19:29:31,064 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 19:29:31,111 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-16 19:29:31,111 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-16 19:29:31,112 INFO L255 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-11-16 19:29:31,113 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-16 19:29:31,171 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-16 19:29:31,172 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-16 19:29:31,225 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-16 19:29:31,225 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2130818259] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-16 19:29:31,225 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-16 19:29:31,225 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 11 [2024-11-16 19:29:31,226 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1749272000] [2024-11-16 19:29:31,226 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-16 19:29:31,226 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-11-16 19:29:31,226 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-16 19:29:31,227 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-11-16 19:29:31,227 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2024-11-16 19:29:31,238 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 28 [2024-11-16 19:29:31,238 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 173 places, 303 transitions, 4717 flow. Second operand has 11 states, 11 states have (on average 8.454545454545455) internal successors, (93), 11 states have internal predecessors, (93), 0 states have call successors, (0), 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 19:29:31,238 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-16 19:29:31,238 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 28 [2024-11-16 19:29:31,238 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-16 19:29:32,669 INFO L124 PetriNetUnfolderBase]: 3127/5549 cut-off events. [2024-11-16 19:29:32,669 INFO L125 PetriNetUnfolderBase]: For 126437/126437 co-relation queries the response was YES. [2024-11-16 19:29:32,695 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39378 conditions, 5549 events. 3127/5549 cut-off events. For 126437/126437 co-relation queries the response was YES. Maximal size of possible extension queue 288. Compared 36138 event pairs, 229 based on Foata normal form. 40/5589 useless extension candidates. Maximal degree in co-relation 39313. Up to 1606 conditions per place. [2024-11-16 19:29:32,728 INFO L140 encePairwiseOnDemand]: 20/28 looper letters, 210 selfloop transitions, 256 changer transitions 56/525 dead transitions. [2024-11-16 19:29:32,728 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 187 places, 525 transitions, 8933 flow [2024-11-16 19:29:32,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-11-16 19:29:32,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2024-11-16 19:29:32,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 185 transitions. [2024-11-16 19:29:32,731 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.44047619047619047 [2024-11-16 19:29:32,731 INFO L175 Difference]: Start difference. First operand has 173 places, 303 transitions, 4717 flow. Second operand 15 states and 185 transitions. [2024-11-16 19:29:32,731 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 187 places, 525 transitions, 8933 flow [2024-11-16 19:29:33,202 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 182 places, 525 transitions, 7726 flow, removed 531 selfloop flow, removed 5 redundant places. [2024-11-16 19:29:33,209 INFO L231 Difference]: Finished difference. Result has 189 places, 386 transitions, 6151 flow [2024-11-16 19:29:33,209 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=3948, PETRI_DIFFERENCE_MINUEND_PLACES=168, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=303, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=171, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=115, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=6151, PETRI_PLACES=189, PETRI_TRANSITIONS=386} [2024-11-16 19:29:33,210 INFO L277 CegarLoopForPetriNet]: 28 programPoint places, 161 predicate places. [2024-11-16 19:29:33,210 INFO L471 AbstractCegarLoop]: Abstraction has has 189 places, 386 transitions, 6151 flow [2024-11-16 19:29:33,210 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.454545454545455) internal successors, (93), 11 states have internal predecessors, (93), 0 states have call successors, (0), 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 19:29:33,210 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-16 19:29:33,211 INFO L204 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-16 19:29:33,223 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2024-11-16 19:29:33,411 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-16 19:29:33,411 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 19:29:33,412 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-16 19:29:33,412 INFO L85 PathProgramCache]: Analyzing trace with hash -1339881128, now seen corresponding path program 5 times [2024-11-16 19:29:33,412 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-16 19:29:33,412 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [230408307] [2024-11-16 19:29:33,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 19:29:33,412 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-16 19:29:33,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 19:29:33,485 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-16 19:29:33,485 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-16 19:29:33,485 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [230408307] [2024-11-16 19:29:33,485 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [230408307] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-16 19:29:33,485 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [364648770] [2024-11-16 19:29:33,485 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-16 19:29:33,486 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-16 19:29:33,486 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-16 19:29:33,488 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 19:29:33,491 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 19:29:33,543 INFO L227 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2024-11-16 19:29:33,543 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-16 19:29:33,545 INFO L255 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-11-16 19:29:33,546 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-16 19:29:33,606 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-16 19:29:33,607 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-16 19:29:33,654 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-16 19:29:33,655 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [364648770] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-16 19:29:33,655 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-16 19:29:33,655 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 12 [2024-11-16 19:29:33,655 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1112699767] [2024-11-16 19:29:33,655 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-16 19:29:33,655 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-11-16 19:29:33,656 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-16 19:29:33,656 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-11-16 19:29:33,656 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2024-11-16 19:29:33,661 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 28 [2024-11-16 19:29:33,661 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 189 places, 386 transitions, 6151 flow. Second operand has 12 states, 12 states have (on average 8.083333333333334) internal successors, (97), 12 states have internal predecessors, (97), 0 states have call successors, (0), 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 19:29:33,661 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-16 19:29:33,662 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 28 [2024-11-16 19:29:33,662 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-16 19:29:35,778 INFO L124 PetriNetUnfolderBase]: 3634/6503 cut-off events. [2024-11-16 19:29:35,779 INFO L125 PetriNetUnfolderBase]: For 166448/166448 co-relation queries the response was YES. [2024-11-16 19:29:35,817 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45397 conditions, 6503 events. 3634/6503 cut-off events. For 166448/166448 co-relation queries the response was YES. Maximal size of possible extension queue 312. Compared 44110 event pairs, 169 based on Foata normal form. 68/6561 useless extension candidates. Maximal degree in co-relation 45329. Up to 1129 conditions per place. [2024-11-16 19:29:35,883 INFO L140 encePairwiseOnDemand]: 18/28 looper letters, 237 selfloop transitions, 370 changer transitions 9/619 dead transitions. [2024-11-16 19:29:35,887 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 213 places, 619 transitions, 10645 flow [2024-11-16 19:29:35,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2024-11-16 19:29:35,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2024-11-16 19:29:35,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 333 transitions. [2024-11-16 19:29:35,897 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4574175824175824 [2024-11-16 19:29:35,897 INFO L175 Difference]: Start difference. First operand has 189 places, 386 transitions, 6151 flow. Second operand 26 states and 333 transitions. [2024-11-16 19:29:35,897 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 213 places, 619 transitions, 10645 flow [2024-11-16 19:29:36,681 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 210 places, 619 transitions, 10532 flow, removed 49 selfloop flow, removed 3 redundant places. [2024-11-16 19:29:36,689 INFO L231 Difference]: Finished difference. Result has 225 places, 472 transitions, 9250 flow [2024-11-16 19:29:36,689 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=6031, PETRI_DIFFERENCE_MINUEND_PLACES=185, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=381, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=280, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=82, PETRI_DIFFERENCE_SUBTRAHEND_STATES=26, PETRI_FLOW=9250, PETRI_PLACES=225, PETRI_TRANSITIONS=472} [2024-11-16 19:29:36,690 INFO L277 CegarLoopForPetriNet]: 28 programPoint places, 197 predicate places. [2024-11-16 19:29:36,690 INFO L471 AbstractCegarLoop]: Abstraction has has 225 places, 472 transitions, 9250 flow [2024-11-16 19:29:36,690 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 8.083333333333334) internal successors, (97), 12 states have internal predecessors, (97), 0 states have call successors, (0), 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 19:29:36,690 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-16 19:29:36,690 INFO L204 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-16 19:29:36,702 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2024-11-16 19:29:36,891 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2024-11-16 19:29:36,891 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 19:29:36,892 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-16 19:29:36,892 INFO L85 PathProgramCache]: Analyzing trace with hash 1591961652, now seen corresponding path program 6 times [2024-11-16 19:29:36,892 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-16 19:29:36,892 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1044438466] [2024-11-16 19:29:36,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 19:29:36,892 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-16 19:29:36,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 19:29:37,008 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-16 19:29:37,009 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-16 19:29:37,009 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1044438466] [2024-11-16 19:29:37,009 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1044438466] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-16 19:29:37,009 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [143317951] [2024-11-16 19:29:37,010 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-16 19:29:37,010 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-16 19:29:37,010 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-16 19:29:37,012 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-16 19:29:37,013 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-11-16 19:29:37,064 INFO L227 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2024-11-16 19:29:37,064 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-16 19:29:37,066 INFO L255 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-11-16 19:29:37,067 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-16 19:29:37,153 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-16 19:29:37,153 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-16 19:29:37,218 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-16 19:29:37,219 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [143317951] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-16 19:29:37,219 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-16 19:29:37,219 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 13 [2024-11-16 19:29:37,219 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2025627001] [2024-11-16 19:29:37,219 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-16 19:29:37,220 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-11-16 19:29:37,220 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-16 19:29:37,221 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-11-16 19:29:37,221 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2024-11-16 19:29:37,239 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 28 [2024-11-16 19:29:37,239 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 225 places, 472 transitions, 9250 flow. Second operand has 13 states, 13 states have (on average 8.538461538461538) internal successors, (111), 13 states have internal predecessors, (111), 0 states have call successors, (0), 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 19:29:37,239 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-16 19:29:37,240 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 28 [2024-11-16 19:29:37,240 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-16 19:29:39,081 INFO L124 PetriNetUnfolderBase]: 4433/7961 cut-off events. [2024-11-16 19:29:39,081 INFO L125 PetriNetUnfolderBase]: For 288233/288233 co-relation queries the response was YES. [2024-11-16 19:29:39,125 INFO L83 FinitePrefix]: Finished finitePrefix Result has 63554 conditions, 7961 events. 4433/7961 cut-off events. For 288233/288233 co-relation queries the response was YES. Maximal size of possible extension queue 359. Compared 56008 event pairs, 172 based on Foata normal form. 44/8000 useless extension candidates. Maximal degree in co-relation 63473. Up to 2090 conditions per place. [2024-11-16 19:29:39,174 INFO L140 encePairwiseOnDemand]: 19/28 looper letters, 276 selfloop transitions, 440 changer transitions 6/725 dead transitions. [2024-11-16 19:29:39,174 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 240 places, 725 transitions, 15408 flow [2024-11-16 19:29:39,174 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-11-16 19:29:39,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2024-11-16 19:29:39,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 211 transitions. [2024-11-16 19:29:39,176 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4432773109243697 [2024-11-16 19:29:39,176 INFO L175 Difference]: Start difference. First operand has 225 places, 472 transitions, 9250 flow. Second operand 17 states and 211 transitions. [2024-11-16 19:29:39,176 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 240 places, 725 transitions, 15408 flow [2024-11-16 19:29:40,576 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 231 places, 725 transitions, 14915 flow, removed 206 selfloop flow, removed 9 redundant places. [2024-11-16 19:29:40,592 INFO L231 Difference]: Finished difference. Result has 239 places, 602 transitions, 13521 flow [2024-11-16 19:29:40,593 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=8889, PETRI_DIFFERENCE_MINUEND_PLACES=215, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=472, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=310, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=128, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=13521, PETRI_PLACES=239, PETRI_TRANSITIONS=602} [2024-11-16 19:29:40,593 INFO L277 CegarLoopForPetriNet]: 28 programPoint places, 211 predicate places. [2024-11-16 19:29:40,593 INFO L471 AbstractCegarLoop]: Abstraction has has 239 places, 602 transitions, 13521 flow [2024-11-16 19:29:40,594 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 8.538461538461538) internal successors, (111), 13 states have internal predecessors, (111), 0 states have call successors, (0), 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 19:29:40,594 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-16 19:29:40,594 INFO L204 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-16 19:29:40,606 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2024-11-16 19:29:40,794 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2024-11-16 19:29:40,795 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 19:29:40,795 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-16 19:29:40,795 INFO L85 PathProgramCache]: Analyzing trace with hash -237004480, now seen corresponding path program 7 times [2024-11-16 19:29:40,795 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-16 19:29:40,795 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [900442577] [2024-11-16 19:29:40,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 19:29:40,795 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-16 19:29:40,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 19:29:40,923 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-16 19:29:40,924 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-16 19:29:40,924 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [900442577] [2024-11-16 19:29:40,924 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [900442577] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-16 19:29:40,924 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [296561119] [2024-11-16 19:29:40,924 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-16 19:29:40,924 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-16 19:29:40,925 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-16 19:29:40,934 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-16 19:29:40,959 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-11-16 19:29:41,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 19:29:41,043 INFO L255 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-11-16 19:29:41,044 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-16 19:29:41,100 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-16 19:29:41,101 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-16 19:29:41,131 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-16 19:29:41,131 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [296561119] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-16 19:29:41,131 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-16 19:29:41,131 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 12 [2024-11-16 19:29:41,131 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [67150975] [2024-11-16 19:29:41,131 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-16 19:29:41,132 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-11-16 19:29:41,132 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-16 19:29:41,132 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-11-16 19:29:41,132 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2024-11-16 19:29:41,138 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 28 [2024-11-16 19:29:41,139 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 239 places, 602 transitions, 13521 flow. Second operand has 12 states, 12 states have (on average 8.083333333333334) internal successors, (97), 12 states have internal predecessors, (97), 0 states have call successors, (0), 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 19:29:41,139 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-16 19:29:41,139 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 28 [2024-11-16 19:29:41,139 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-16 19:29:43,362 INFO L124 PetriNetUnfolderBase]: 4386/7964 cut-off events. [2024-11-16 19:29:43,362 INFO L125 PetriNetUnfolderBase]: For 323409/323409 co-relation queries the response was YES. [2024-11-16 19:29:43,410 INFO L83 FinitePrefix]: Finished finitePrefix Result has 67560 conditions, 7964 events. 4386/7964 cut-off events. For 323409/323409 co-relation queries the response was YES. Maximal size of possible extension queue 350. Compared 56945 event pairs, 429 based on Foata normal form. 24/7988 useless extension candidates. Maximal degree in co-relation 67472. Up to 1622 conditions per place. [2024-11-16 19:29:43,450 INFO L140 encePairwiseOnDemand]: 18/28 looper letters, 313 selfloop transitions, 409 changer transitions 16/741 dead transitions. [2024-11-16 19:29:43,451 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 256 places, 741 transitions, 17335 flow [2024-11-16 19:29:43,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2024-11-16 19:29:43,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2024-11-16 19:29:43,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 256 transitions. [2024-11-16 19:29:43,453 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.45714285714285713 [2024-11-16 19:29:43,453 INFO L175 Difference]: Start difference. First operand has 239 places, 602 transitions, 13521 flow. Second operand 20 states and 256 transitions. [2024-11-16 19:29:43,453 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 256 places, 741 transitions, 17335 flow [2024-11-16 19:29:44,994 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 252 places, 741 transitions, 17199 flow, removed 35 selfloop flow, removed 4 redundant places. [2024-11-16 19:29:45,006 INFO L231 Difference]: Finished difference. Result has 258 places, 598 transitions, 14611 flow [2024-11-16 19:29:45,006 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=13124, PETRI_DIFFERENCE_MINUEND_PLACES=233, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=580, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=388, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=181, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=14611, PETRI_PLACES=258, PETRI_TRANSITIONS=598} [2024-11-16 19:29:45,006 INFO L277 CegarLoopForPetriNet]: 28 programPoint places, 230 predicate places. [2024-11-16 19:29:45,007 INFO L471 AbstractCegarLoop]: Abstraction has has 258 places, 598 transitions, 14611 flow [2024-11-16 19:29:45,007 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 8.083333333333334) internal successors, (97), 12 states have internal predecessors, (97), 0 states have call successors, (0), 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 19:29:45,007 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-16 19:29:45,007 INFO L204 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-16 19:29:45,022 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2024-11-16 19:29:45,209 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2024-11-16 19:29:45,210 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 19:29:45,210 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-16 19:29:45,210 INFO L85 PathProgramCache]: Analyzing trace with hash 801523958, now seen corresponding path program 8 times [2024-11-16 19:29:45,210 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-16 19:29:45,210 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1930094773] [2024-11-16 19:29:45,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 19:29:45,210 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-16 19:29:45,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 19:29:45,283 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-16 19:29:45,283 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-16 19:29:45,283 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1930094773] [2024-11-16 19:29:45,283 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1930094773] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-16 19:29:45,284 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [420878905] [2024-11-16 19:29:45,284 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-16 19:29:45,284 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-16 19:29:45,284 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-16 19:29:45,286 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-16 19:29:45,288 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-11-16 19:29:45,328 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-16 19:29:45,328 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-16 19:29:45,328 INFO L255 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-11-16 19:29:45,329 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-16 19:29:45,392 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-16 19:29:45,393 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-16 19:29:45,458 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-16 19:29:45,458 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [420878905] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-16 19:29:45,458 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-16 19:29:45,458 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 6] total 13 [2024-11-16 19:29:45,458 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [86149063] [2024-11-16 19:29:45,458 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-16 19:29:45,459 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-11-16 19:29:45,459 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-16 19:29:45,459 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-11-16 19:29:45,459 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=109, Unknown=0, NotChecked=0, Total=156 [2024-11-16 19:29:45,489 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 28 [2024-11-16 19:29:45,490 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 258 places, 598 transitions, 14611 flow. Second operand has 13 states, 13 states have (on average 8.076923076923077) internal successors, (105), 13 states have internal predecessors, (105), 0 states have call successors, (0), 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 19:29:45,490 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-16 19:29:45,490 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 28 [2024-11-16 19:29:45,490 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-16 19:29:48,116 INFO L124 PetriNetUnfolderBase]: 4776/8557 cut-off events. [2024-11-16 19:29:48,116 INFO L125 PetriNetUnfolderBase]: For 416685/416685 co-relation queries the response was YES. [2024-11-16 19:29:48,173 INFO L83 FinitePrefix]: Finished finitePrefix Result has 78753 conditions, 8557 events. 4776/8557 cut-off events. For 416685/416685 co-relation queries the response was YES. Maximal size of possible extension queue 379. Compared 61112 event pairs, 398 based on Foata normal form. 66/8611 useless extension candidates. Maximal degree in co-relation 78658. Up to 1703 conditions per place. [2024-11-16 19:29:48,221 INFO L140 encePairwiseOnDemand]: 18/28 looper letters, 249 selfloop transitions, 544 changer transitions 17/813 dead transitions. [2024-11-16 19:29:48,221 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 277 places, 813 transitions, 20402 flow [2024-11-16 19:29:48,222 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2024-11-16 19:29:48,222 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2024-11-16 19:29:48,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 317 transitions. [2024-11-16 19:29:48,223 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.43543956043956045 [2024-11-16 19:29:48,223 INFO L175 Difference]: Start difference. First operand has 258 places, 598 transitions, 14611 flow. Second operand 26 states and 317 transitions. [2024-11-16 19:29:48,223 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 277 places, 813 transitions, 20402 flow [2024-11-16 19:29:50,063 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 266 places, 813 transitions, 19876 flow, removed 58 selfloop flow, removed 11 redundant places. [2024-11-16 19:29:50,078 INFO L231 Difference]: Finished difference. Result has 275 places, 676 transitions, 18458 flow [2024-11-16 19:29:50,078 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=14058, PETRI_DIFFERENCE_MINUEND_PLACES=241, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=587, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=462, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=108, PETRI_DIFFERENCE_SUBTRAHEND_STATES=26, PETRI_FLOW=18458, PETRI_PLACES=275, PETRI_TRANSITIONS=676} [2024-11-16 19:29:50,079 INFO L277 CegarLoopForPetriNet]: 28 programPoint places, 247 predicate places. [2024-11-16 19:29:50,079 INFO L471 AbstractCegarLoop]: Abstraction has has 275 places, 676 transitions, 18458 flow [2024-11-16 19:29:50,079 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 8.076923076923077) internal successors, (105), 13 states have internal predecessors, (105), 0 states have call successors, (0), 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 19:29:50,079 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-16 19:29:50,079 INFO L204 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-16 19:29:50,094 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2024-11-16 19:29:50,280 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2024-11-16 19:29:50,280 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 19:29:50,280 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-16 19:29:50,280 INFO L85 PathProgramCache]: Analyzing trace with hash -1165218914, now seen corresponding path program 9 times [2024-11-16 19:29:50,280 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-16 19:29:50,280 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1433338912] [2024-11-16 19:29:50,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 19:29:50,281 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-16 19:29:50,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 19:29:50,343 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-16 19:29:50,344 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-16 19:29:50,344 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1433338912] [2024-11-16 19:29:50,344 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1433338912] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-16 19:29:50,344 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [346091980] [2024-11-16 19:29:50,344 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-16 19:29:50,344 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-16 19:29:50,344 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-16 19:29:50,346 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-16 19:29:50,347 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-11-16 19:29:50,398 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2024-11-16 19:29:50,398 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-16 19:29:50,399 INFO L255 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-11-16 19:29:50,400 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-16 19:29:50,471 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-16 19:29:50,471 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-16 19:29:50,513 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-16 19:29:50,513 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [346091980] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-16 19:29:50,513 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-16 19:29:50,513 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 15 [2024-11-16 19:29:50,514 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1607515432] [2024-11-16 19:29:50,514 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-16 19:29:50,514 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-11-16 19:29:50,514 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-16 19:29:50,515 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-11-16 19:29:50,515 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=160, Unknown=0, NotChecked=0, Total=210 [2024-11-16 19:29:50,527 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 28 [2024-11-16 19:29:50,527 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 275 places, 676 transitions, 18458 flow. Second operand has 15 states, 15 states have (on average 7.866666666666666) internal successors, (118), 15 states have internal predecessors, (118), 0 states have call successors, (0), 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 19:29:50,527 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-16 19:29:50,527 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 28 [2024-11-16 19:29:50,527 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-16 19:29:53,606 INFO L124 PetriNetUnfolderBase]: 5607/10002 cut-off events. [2024-11-16 19:29:53,606 INFO L125 PetriNetUnfolderBase]: For 568338/568338 co-relation queries the response was YES. [2024-11-16 19:29:53,678 INFO L83 FinitePrefix]: Finished finitePrefix Result has 98008 conditions, 10002 events. 5607/10002 cut-off events. For 568338/568338 co-relation queries the response was YES. Maximal size of possible extension queue 456. Compared 72980 event pairs, 1346 based on Foata normal form. 36/10037 useless extension candidates. Maximal degree in co-relation 97910. Up to 5195 conditions per place. [2024-11-16 19:29:53,741 INFO L140 encePairwiseOnDemand]: 18/28 looper letters, 447 selfloop transitions, 509 changer transitions 15/974 dead transitions. [2024-11-16 19:29:53,741 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 300 places, 974 transitions, 26595 flow [2024-11-16 19:29:53,742 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2024-11-16 19:29:53,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2024-11-16 19:29:53,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 331 transitions. [2024-11-16 19:29:53,744 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4221938775510204 [2024-11-16 19:29:53,744 INFO L175 Difference]: Start difference. First operand has 275 places, 676 transitions, 18458 flow. Second operand 28 states and 331 transitions. [2024-11-16 19:29:53,744 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 300 places, 974 transitions, 26595 flow [2024-11-16 19:29:57,763 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 286 places, 974 transitions, 25844 flow, removed 171 selfloop flow, removed 14 redundant places. [2024-11-16 19:29:57,786 INFO L231 Difference]: Finished difference. Result has 299 places, 843 transitions, 24206 flow [2024-11-16 19:29:57,786 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=17812, PETRI_DIFFERENCE_MINUEND_PLACES=259, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=676, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=364, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=279, PETRI_DIFFERENCE_SUBTRAHEND_STATES=28, PETRI_FLOW=24206, PETRI_PLACES=299, PETRI_TRANSITIONS=843} [2024-11-16 19:29:57,787 INFO L277 CegarLoopForPetriNet]: 28 programPoint places, 271 predicate places. [2024-11-16 19:29:57,787 INFO L471 AbstractCegarLoop]: Abstraction has has 299 places, 843 transitions, 24206 flow [2024-11-16 19:29:57,787 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 7.866666666666666) internal successors, (118), 15 states have internal predecessors, (118), 0 states have call successors, (0), 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 19:29:57,787 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-16 19:29:57,788 INFO L204 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-16 19:29:57,804 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2024-11-16 19:29:57,988 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2024-11-16 19:29:57,988 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 19:29:57,989 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-16 19:29:57,989 INFO L85 PathProgramCache]: Analyzing trace with hash -391801664, now seen corresponding path program 10 times [2024-11-16 19:29:57,989 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-16 19:29:57,989 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1909535796] [2024-11-16 19:29:57,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 19:29:57,989 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-16 19:29:57,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 19:29:58,171 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-16 19:29:58,171 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-16 19:29:58,172 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1909535796] [2024-11-16 19:29:58,172 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1909535796] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-16 19:29:58,172 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [526395038] [2024-11-16 19:29:58,172 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-16 19:29:58,172 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-16 19:29:58,172 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-16 19:29:58,174 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-16 19:29:58,176 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-11-16 19:29:58,218 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-16 19:29:58,219 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-16 19:29:58,219 INFO L255 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-11-16 19:29:58,220 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-16 19:29:58,290 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-16 19:29:58,290 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-16 19:29:58,333 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-16 19:29:58,333 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [526395038] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-16 19:29:58,333 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-16 19:29:58,333 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 15 [2024-11-16 19:29:58,333 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1754156887] [2024-11-16 19:29:58,333 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-16 19:29:58,333 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-11-16 19:29:58,334 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-16 19:29:58,334 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-11-16 19:29:58,334 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=153, Unknown=0, NotChecked=0, Total=210 [2024-11-16 19:29:58,345 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 28 [2024-11-16 19:29:58,345 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 299 places, 843 transitions, 24206 flow. Second operand has 15 states, 15 states have (on average 8.133333333333333) internal successors, (122), 15 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 19:29:58,345 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-16 19:29:58,345 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 28 [2024-11-16 19:29:58,345 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-16 19:30:02,078 INFO L124 PetriNetUnfolderBase]: 6166/10903 cut-off events. [2024-11-16 19:30:02,079 INFO L125 PetriNetUnfolderBase]: For 789900/789900 co-relation queries the response was YES. [2024-11-16 19:30:02,156 INFO L83 FinitePrefix]: Finished finitePrefix Result has 115428 conditions, 10903 events. 6166/10903 cut-off events. For 789900/789900 co-relation queries the response was YES. Maximal size of possible extension queue 535. Compared 79867 event pairs, 921 based on Foata normal form. 120/11022 useless extension candidates. Maximal degree in co-relation 115320. Up to 3780 conditions per place. [2024-11-16 19:30:02,207 INFO L140 encePairwiseOnDemand]: 18/28 looper letters, 468 selfloop transitions, 577 changer transitions 14/1062 dead transitions. [2024-11-16 19:30:02,207 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 318 places, 1062 transitions, 31276 flow [2024-11-16 19:30:02,207 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2024-11-16 19:30:02,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2024-11-16 19:30:02,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 260 transitions. [2024-11-16 19:30:02,208 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4642857142857143 [2024-11-16 19:30:02,208 INFO L175 Difference]: Start difference. First operand has 299 places, 843 transitions, 24206 flow. Second operand 20 states and 260 transitions. [2024-11-16 19:30:02,208 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 318 places, 1062 transitions, 31276 flow [2024-11-16 19:30:08,373 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 311 places, 1062 transitions, 29578 flow, removed 609 selfloop flow, removed 7 redundant places. [2024-11-16 19:30:08,395 INFO L231 Difference]: Finished difference. Result has 323 places, 921 transitions, 27771 flow [2024-11-16 19:30:08,396 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=22718, PETRI_DIFFERENCE_MINUEND_PLACES=292, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=834, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=496, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=314, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=27771, PETRI_PLACES=323, PETRI_TRANSITIONS=921} [2024-11-16 19:30:08,396 INFO L277 CegarLoopForPetriNet]: 28 programPoint places, 295 predicate places. [2024-11-16 19:30:08,397 INFO L471 AbstractCegarLoop]: Abstraction has has 323 places, 921 transitions, 27771 flow [2024-11-16 19:30:08,397 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 8.133333333333333) internal successors, (122), 15 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 19:30:08,397 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-16 19:30:08,397 INFO L204 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-16 19:30:08,410 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2024-11-16 19:30:08,600 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2024-11-16 19:30:08,601 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-16 19:30:08,601 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-16 19:30:08,601 INFO L85 PathProgramCache]: Analyzing trace with hash 325113732, now seen corresponding path program 11 times [2024-11-16 19:30:08,601 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-16 19:30:08,601 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1605803005] [2024-11-16 19:30:08,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 19:30:08,602 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-16 19:30:08,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 19:30:08,662 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-16 19:30:08,663 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-16 19:30:08,663 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1605803005] [2024-11-16 19:30:08,663 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1605803005] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-16 19:30:08,663 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [739846948] [2024-11-16 19:30:08,663 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-16 19:30:08,664 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-16 19:30:08,664 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-16 19:30:08,666 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-16 19:30:08,670 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2024-11-16 19:30:08,731 INFO L227 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2024-11-16 19:30:08,731 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-16 19:30:08,732 INFO L255 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-11-16 19:30:08,733 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-16 19:30:08,808 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-16 19:30:08,809 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-16 19:30:08,858 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-16 19:30:08,859 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [739846948] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-16 19:30:08,859 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-16 19:30:08,859 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 6] total 13 [2024-11-16 19:30:08,859 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2056191777] [2024-11-16 19:30:08,859 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-16 19:30:08,859 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-11-16 19:30:08,859 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-16 19:30:08,860 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-11-16 19:30:08,860 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=113, Unknown=0, NotChecked=0, Total=156 [2024-11-16 19:30:08,890 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 28 [2024-11-16 19:30:08,891 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 323 places, 921 transitions, 27771 flow. Second operand has 13 states, 13 states have (on average 8.23076923076923) internal successors, (107), 13 states have internal predecessors, (107), 0 states have call successors, (0), 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 19:30:08,891 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-16 19:30:08,891 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 28 [2024-11-16 19:30:08,891 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-16 19:30:12,849 INFO L124 PetriNetUnfolderBase]: 6508/11499 cut-off events. [2024-11-16 19:30:12,849 INFO L125 PetriNetUnfolderBase]: For 827673/827673 co-relation queries the response was YES. [2024-11-16 19:30:12,923 INFO L83 FinitePrefix]: Finished finitePrefix Result has 123731 conditions, 11499 events. 6508/11499 cut-off events. For 827673/827673 co-relation queries the response was YES. Maximal size of possible extension queue 570. Compared 84756 event pairs, 895 based on Foata normal form. 66/11564 useless extension candidates. Maximal degree in co-relation 123616. Up to 3535 conditions per place. [2024-11-16 19:30:12,972 INFO L140 encePairwiseOnDemand]: 18/28 looper letters, 433 selfloop transitions, 626 changer transitions 11/1073 dead transitions. [2024-11-16 19:30:12,972 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 340 places, 1073 transitions, 33135 flow [2024-11-16 19:30:12,972 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2024-11-16 19:30:12,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2024-11-16 19:30:12,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 238 transitions. [2024-11-16 19:30:12,973 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4473684210526316 [2024-11-16 19:30:12,973 INFO L175 Difference]: Start difference. First operand has 323 places, 921 transitions, 27771 flow. Second operand 19 states and 238 transitions. [2024-11-16 19:30:12,973 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 340 places, 1073 transitions, 33135 flow [2024-11-16 19:30:17,896 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 336 places, 1073 transitions, 32716 flow, removed 156 selfloop flow, removed 4 redundant places. [2024-11-16 19:30:17,920 INFO L231 Difference]: Finished difference. Result has 344 places, 963 transitions, 31396 flow [2024-11-16 19:30:17,921 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=27304, PETRI_DIFFERENCE_MINUEND_PLACES=318, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=912, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=577, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=316, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=31396, PETRI_PLACES=344, PETRI_TRANSITIONS=963} [2024-11-16 19:30:17,921 INFO L277 CegarLoopForPetriNet]: 28 programPoint places, 316 predicate places. [2024-11-16 19:30:17,922 INFO L471 AbstractCegarLoop]: Abstraction has has 344 places, 963 transitions, 31396 flow [2024-11-16 19:30:17,922 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 8.23076923076923) internal successors, (107), 13 states have internal predecessors, (107), 0 states have call successors, (0), 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 19:30:17,922 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-16 19:30:17,922 INFO L204 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-16 19:30:17,934 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2024-11-16 19:30:18,122 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-16 19:30:18,123 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-16 19:30:18,123 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-16 19:30:18,123 INFO L85 PathProgramCache]: Analyzing trace with hash 26406450, now seen corresponding path program 12 times [2024-11-16 19:30:18,123 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-16 19:30:18,123 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [329655839] [2024-11-16 19:30:18,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 19:30:18,123 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-16 19:30:18,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 19:30:18,185 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-16 19:30:18,186 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-16 19:30:18,186 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [329655839] [2024-11-16 19:30:18,186 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [329655839] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-16 19:30:18,186 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [10385324] [2024-11-16 19:30:18,186 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-16 19:30:18,187 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-16 19:30:18,187 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-16 19:30:18,188 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-16 19:30:18,191 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2024-11-16 19:30:18,235 INFO L227 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2024-11-16 19:30:18,235 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-16 19:30:18,236 INFO L255 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-11-16 19:30:18,237 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-16 19:30:18,307 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-16 19:30:18,307 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-16 19:30:18,346 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-16 19:30:18,346 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [10385324] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-16 19:30:18,346 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-16 19:30:18,346 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 6] total 13 [2024-11-16 19:30:18,347 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1412268652] [2024-11-16 19:30:18,347 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-16 19:30:18,347 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-11-16 19:30:18,347 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-16 19:30:18,347 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-11-16 19:30:18,348 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2024-11-16 19:30:18,351 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 28 [2024-11-16 19:30:18,351 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 344 places, 963 transitions, 31396 flow. Second operand has 13 states, 13 states have (on average 8.076923076923077) internal successors, (105), 13 states have internal predecessors, (105), 0 states have call successors, (0), 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 19:30:18,351 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-16 19:30:18,351 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 28 [2024-11-16 19:30:18,351 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-16 19:30:22,250 INFO L124 PetriNetUnfolderBase]: 6499/11558 cut-off events. [2024-11-16 19:30:22,251 INFO L125 PetriNetUnfolderBase]: For 893617/893617 co-relation queries the response was YES. [2024-11-16 19:30:22,345 INFO L83 FinitePrefix]: Finished finitePrefix Result has 129819 conditions, 11558 events. 6499/11558 cut-off events. For 893617/893617 co-relation queries the response was YES. Maximal size of possible extension queue 564. Compared 86161 event pairs, 1645 based on Foata normal form. 16/11573 useless extension candidates. Maximal degree in co-relation 129696. Up to 6394 conditions per place. [2024-11-16 19:30:22,655 INFO L140 encePairwiseOnDemand]: 18/28 looper letters, 451 selfloop transitions, 574 changer transitions 13/1041 dead transitions. [2024-11-16 19:30:22,655 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 355 places, 1041 transitions, 34541 flow [2024-11-16 19:30:22,656 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2024-11-16 19:30:22,656 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2024-11-16 19:30:22,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 219 transitions. [2024-11-16 19:30:22,657 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.43452380952380953 [2024-11-16 19:30:22,657 INFO L175 Difference]: Start difference. First operand has 344 places, 963 transitions, 31396 flow. Second operand 18 states and 219 transitions. [2024-11-16 19:30:22,657 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 355 places, 1041 transitions, 34541 flow [2024-11-16 19:30:28,212 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 340 places, 1041 transitions, 34228 flow, removed 74 selfloop flow, removed 15 redundant places. [2024-11-16 19:30:28,234 INFO L231 Difference]: Finished difference. Result has 346 places, 957 transitions, 33287 flow [2024-11-16 19:30:28,235 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=30835, PETRI_DIFFERENCE_MINUEND_PLACES=323, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=946, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=561, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=379, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=33287, PETRI_PLACES=346, PETRI_TRANSITIONS=957} [2024-11-16 19:30:28,235 INFO L277 CegarLoopForPetriNet]: 28 programPoint places, 318 predicate places. [2024-11-16 19:30:28,235 INFO L471 AbstractCegarLoop]: Abstraction has has 346 places, 957 transitions, 33287 flow [2024-11-16 19:30:28,236 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 8.076923076923077) internal successors, (105), 13 states have internal predecessors, (105), 0 states have call successors, (0), 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 19:30:28,236 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-16 19:30:28,236 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] [2024-11-16 19:30:28,247 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2024-11-16 19:30:28,436 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-16 19:30:28,436 INFO L396 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-16 19:30:28,437 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-16 19:30:28,437 INFO L85 PathProgramCache]: Analyzing trace with hash 565595982, now seen corresponding path program 13 times [2024-11-16 19:30:28,437 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-16 19:30:28,437 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [396288269] [2024-11-16 19:30:28,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 19:30:28,437 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-16 19:30:28,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 19:30:28,499 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 19:30:28,500 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-16 19:30:28,500 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [396288269] [2024-11-16 19:30:28,500 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [396288269] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-16 19:30:28,500 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [891303897] [2024-11-16 19:30:28,500 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-16 19:30:28,500 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-16 19:30:28,501 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-16 19:30:28,502 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-16 19:30:28,504 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2024-11-16 19:30:28,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 19:30:28,551 INFO L255 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 13 conjuncts are in the unsatisfiable core [2024-11-16 19:30:28,552 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-16 19:30:28,593 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 12 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-16 19:30:28,594 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-16 19:30:28,643 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 12 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-16 19:30:28,643 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [891303897] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-16 19:30:28,643 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-16 19:30:28,644 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 6, 6] total 7 [2024-11-16 19:30:28,644 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [642937574] [2024-11-16 19:30:28,644 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-16 19:30:28,644 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-11-16 19:30:28,644 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-16 19:30:28,645 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-11-16 19:30:28,645 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2024-11-16 19:30:28,645 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 28 [2024-11-16 19:30:28,645 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 346 places, 957 transitions, 33287 flow. Second operand has 8 states, 8 states have (on average 12.625) internal successors, (101), 8 states have internal predecessors, (101), 0 states have call successors, (0), 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 19:30:28,645 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-16 19:30:28,645 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 28 [2024-11-16 19:30:28,645 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-16 19:30:34,665 INFO L124 PetriNetUnfolderBase]: 9610/18279 cut-off events. [2024-11-16 19:30:34,666 INFO L125 PetriNetUnfolderBase]: For 1550461/1551117 co-relation queries the response was YES. [2024-11-16 19:30:34,863 INFO L83 FinitePrefix]: Finished finitePrefix Result has 221991 conditions, 18279 events. 9610/18279 cut-off events. For 1550461/1551117 co-relation queries the response was YES. Maximal size of possible extension queue 870. Compared 159573 event pairs, 806 based on Foata normal form. 366/18443 useless extension candidates. Maximal degree in co-relation 221869. Up to 4519 conditions per place. [2024-11-16 19:30:34,985 INFO L140 encePairwiseOnDemand]: 23/28 looper letters, 1927 selfloop transitions, 10 changer transitions 237/2309 dead transitions. [2024-11-16 19:30:34,985 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 346 places, 2309 transitions, 86690 flow [2024-11-16 19:30:34,986 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-16 19:30:34,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-16 19:30:34,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 98 transitions. [2024-11-16 19:30:34,986 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.7 [2024-11-16 19:30:34,986 INFO L175 Difference]: Start difference. First operand has 346 places, 957 transitions, 33287 flow. Second operand 5 states and 98 transitions. [2024-11-16 19:30:34,986 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 346 places, 2309 transitions, 86690 flow [2024-11-16 19:30:47,346 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 338 places, 2309 transitions, 86344 flow, removed 11 selfloop flow, removed 8 redundant places. [2024-11-16 19:30:47,378 INFO L231 Difference]: Finished difference. Result has 339 places, 946 transitions, 32671 flow [2024-11-16 19:30:47,379 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=33104, PETRI_DIFFERENCE_MINUEND_PLACES=334, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=957, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=950, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=32671, PETRI_PLACES=339, PETRI_TRANSITIONS=946} [2024-11-16 19:30:47,380 INFO L277 CegarLoopForPetriNet]: 28 programPoint places, 311 predicate places. [2024-11-16 19:30:47,380 INFO L471 AbstractCegarLoop]: Abstraction has has 339 places, 946 transitions, 32671 flow [2024-11-16 19:30:47,380 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.625) internal successors, (101), 8 states have internal predecessors, (101), 0 states have call successors, (0), 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 19:30:47,380 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-16 19:30:47,380 INFO L204 CegarLoopForPetriNet]: trace histogram [4, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-16 19:30:47,397 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2024-11-16 19:30:47,581 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-16 19:30:47,581 INFO L396 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-16 19:30:47,581 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-16 19:30:47,581 INFO L85 PathProgramCache]: Analyzing trace with hash -318644380, now seen corresponding path program 14 times [2024-11-16 19:30:47,582 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-16 19:30:47,582 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [857541751] [2024-11-16 19:30:47,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 19:30:47,582 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-16 19:30:47,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 19:30:47,672 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 8 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-16 19:30:47,672 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-16 19:30:47,674 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [857541751] [2024-11-16 19:30:47,674 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [857541751] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-16 19:30:47,674 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [179116508] [2024-11-16 19:30:47,674 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-16 19:30:47,674 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-16 19:30:47,674 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-16 19:30:47,676 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-16 19:30:47,677 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2024-11-16 19:30:47,724 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-16 19:30:47,725 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-16 19:30:47,726 INFO L255 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-16 19:30:47,726 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-16 19:30:47,844 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 14 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-16 19:30:47,845 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-16 19:30:47,923 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 10 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-16 19:30:47,923 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [179116508] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-16 19:30:47,923 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-16 19:30:47,923 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 20 [2024-11-16 19:30:47,923 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [303315229] [2024-11-16 19:30:47,923 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-16 19:30:47,924 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-11-16 19:30:47,924 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-16 19:30:47,924 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-11-16 19:30:47,924 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=292, Unknown=0, NotChecked=0, Total=380 [2024-11-16 19:30:47,937 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 28 [2024-11-16 19:30:47,937 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 339 places, 946 transitions, 32671 flow. Second operand has 20 states, 20 states have (on average 8.1) internal successors, (162), 20 states have internal predecessors, (162), 0 states have call successors, (0), 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 19:30:47,937 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-16 19:30:47,937 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 28 [2024-11-16 19:30:47,937 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand