./Ultimate.py --spec /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/properties/unreach-call.prp --file /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/mult-comm.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 84cfde4a Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/mult-comm.wvr.c -s /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate-clean/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 de93f11842753a9f5cde98724d1851736862f745073786263bfd177abe6c2376 --- Real Ultimate output --- This is Ultimate 0.2.5-dev-84cfde4 [2024-10-11 14:28:16,428 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-10-11 14:28:16,480 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-10-11 14:28:16,485 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-10-11 14:28:16,487 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-10-11 14:28:16,508 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-10-11 14:28:16,508 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-10-11 14:28:16,509 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-10-11 14:28:16,509 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-10-11 14:28:16,510 INFO L153 SettingsManager]: * Use memory slicer=true [2024-10-11 14:28:16,510 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-10-11 14:28:16,510 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-10-11 14:28:16,511 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-10-11 14:28:16,513 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-10-11 14:28:16,513 INFO L153 SettingsManager]: * Use SBE=true [2024-10-11 14:28:16,513 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-10-11 14:28:16,513 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-10-11 14:28:16,514 INFO L153 SettingsManager]: * sizeof long=4 [2024-10-11 14:28:16,514 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-10-11 14:28:16,514 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-10-11 14:28:16,514 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-10-11 14:28:16,517 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-10-11 14:28:16,517 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-10-11 14:28:16,517 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-10-11 14:28:16,517 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-10-11 14:28:16,518 INFO L153 SettingsManager]: * sizeof long double=12 [2024-10-11 14:28:16,518 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-10-11 14:28:16,518 INFO L153 SettingsManager]: * Use constant arrays=true [2024-10-11 14:28:16,518 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-10-11 14:28:16,518 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-10-11 14:28:16,519 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-10-11 14:28:16,519 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-10-11 14:28:16,519 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-11 14:28:16,519 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-10-11 14:28:16,519 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-10-11 14:28:16,519 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-10-11 14:28:16,520 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-10-11 14:28:16,520 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-10-11 14:28:16,520 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-10-11 14:28:16,521 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-10-11 14:28:16,521 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-10-11 14:28:16,521 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-10-11 14:28:16,521 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-clean/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> de93f11842753a9f5cde98724d1851736862f745073786263bfd177abe6c2376 [2024-10-11 14:28:16,754 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-10-11 14:28:16,773 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-10-11 14:28:16,775 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-10-11 14:28:16,776 INFO L270 PluginConnector]: Initializing CDTParser... [2024-10-11 14:28:16,776 INFO L274 PluginConnector]: CDTParser initialized [2024-10-11 14:28:16,777 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/mult-comm.wvr.c [2024-10-11 14:28:18,015 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-10-11 14:28:18,148 INFO L384 CDTParser]: Found 1 translation units. [2024-10-11 14:28:18,148 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/mult-comm.wvr.c [2024-10-11 14:28:18,154 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/data/e64290b8e/41cb84392098466b8fef36bba73f714c/FLAG2f1497862 [2024-10-11 14:28:18,557 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/data/e64290b8e/41cb84392098466b8fef36bba73f714c [2024-10-11 14:28:18,559 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-10-11 14:28:18,560 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-10-11 14:28:18,561 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-10-11 14:28:18,561 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-10-11 14:28:18,566 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-10-11 14:28:18,567 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.10 02:28:18" (1/1) ... [2024-10-11 14:28:18,567 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4f55aff7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:28:18, skipping insertion in model container [2024-10-11 14:28:18,567 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.10 02:28:18" (1/1) ... [2024-10-11 14:28:18,583 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-10-11 14:28:18,747 WARN L248 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/mult-comm.wvr.c[1936,1949] [2024-10-11 14:28:18,752 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-11 14:28:18,759 INFO L200 MainTranslator]: Completed pre-run [2024-10-11 14:28:18,775 WARN L248 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/mult-comm.wvr.c[1936,1949] [2024-10-11 14:28:18,780 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-11 14:28:18,796 INFO L204 MainTranslator]: Completed translation [2024-10-11 14:28:18,796 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:28:18 WrapperNode [2024-10-11 14:28:18,796 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-10-11 14:28:18,797 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-10-11 14:28:18,798 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-10-11 14:28:18,798 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-10-11 14:28:18,803 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:28:18" (1/1) ... [2024-10-11 14:28:18,809 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:28:18" (1/1) ... [2024-10-11 14:28:18,825 INFO L138 Inliner]: procedures = 20, calls = 9, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 41 [2024-10-11 14:28:18,825 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-10-11 14:28:18,826 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-10-11 14:28:18,826 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-10-11 14:28:18,826 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-10-11 14:28:18,834 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:28:18" (1/1) ... [2024-10-11 14:28:18,835 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:28:18" (1/1) ... [2024-10-11 14:28:18,837 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:28:18" (1/1) ... [2024-10-11 14:28:18,855 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]. [2024-10-11 14:28:18,856 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:28:18" (1/1) ... [2024-10-11 14:28:18,856 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:28:18" (1/1) ... [2024-10-11 14:28:18,861 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:28:18" (1/1) ... [2024-10-11 14:28:18,864 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:28:18" (1/1) ... [2024-10-11 14:28:18,864 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:28:18" (1/1) ... [2024-10-11 14:28:18,865 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:28:18" (1/1) ... [2024-10-11 14:28:18,868 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-10-11 14:28:18,869 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-10-11 14:28:18,872 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-10-11 14:28:18,872 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-10-11 14:28:18,873 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:28:18" (1/1) ... [2024-10-11 14:28:18,877 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-11 14:28:18,885 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 14:28:18,900 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-10-11 14:28:18,904 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-10-11 14:28:18,939 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-10-11 14:28:18,939 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2024-10-11 14:28:18,939 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2024-10-11 14:28:18,939 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2024-10-11 14:28:18,940 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2024-10-11 14:28:18,940 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-10-11 14:28:18,940 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-10-11 14:28:18,940 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-10-11 14:28:18,942 WARN L207 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2024-10-11 14:28:19,036 INFO L238 CfgBuilder]: Building ICFG [2024-10-11 14:28:19,041 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-10-11 14:28:19,192 INFO L283 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2024-10-11 14:28:19,192 INFO L287 CfgBuilder]: Performing block encoding [2024-10-11 14:28:19,302 INFO L309 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-10-11 14:28:19,304 INFO L314 CfgBuilder]: Removed 2 assume(true) statements. [2024-10-11 14:28:19,305 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.10 02:28:19 BoogieIcfgContainer [2024-10-11 14:28:19,305 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-10-11 14:28:19,307 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-10-11 14:28:19,307 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-10-11 14:28:19,310 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-10-11 14:28:19,310 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 11.10 02:28:18" (1/3) ... [2024-10-11 14:28:19,311 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2899985 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.10 02:28:19, skipping insertion in model container [2024-10-11 14:28:19,311 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:28:18" (2/3) ... [2024-10-11 14:28:19,311 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2899985 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.10 02:28:19, skipping insertion in model container [2024-10-11 14:28:19,311 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.10 02:28:19" (3/3) ... [2024-10-11 14:28:19,313 INFO L112 eAbstractionObserver]: Analyzing ICFG mult-comm.wvr.c [2024-10-11 14:28:19,327 INFO L209 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-10-11 14:28:19,327 INFO L149 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-10-11 14:28:19,327 INFO L484 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-10-11 14:28:19,363 INFO L143 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2024-10-11 14:28:19,393 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 23 places, 18 transitions, 50 flow [2024-10-11 14:28:19,417 INFO L124 PetriNetUnfolderBase]: 2/16 cut-off events. [2024-10-11 14:28:19,418 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-10-11 14:28:19,420 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25 conditions, 16 events. 2/16 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 2. Compared 9 event pairs, 0 based on Foata normal form. 0/13 useless extension candidates. Maximal degree in co-relation 11. Up to 2 conditions per place. [2024-10-11 14:28:19,420 INFO L82 GeneralOperation]: Start removeDead. Operand has 23 places, 18 transitions, 50 flow [2024-10-11 14:28:19,423 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 20 places, 15 transitions, 42 flow [2024-10-11 14:28:19,429 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-10-11 14:28:19,433 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;@7c744135, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-10-11 14:28:19,434 INFO L334 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2024-10-11 14:28:19,442 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-10-11 14:28:19,442 INFO L124 PetriNetUnfolderBase]: 2/14 cut-off events. [2024-10-11 14:28:19,442 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-10-11 14:28:19,442 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 14:28:19,443 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 14:28:19,443 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-11 14:28:19,447 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 14:28:19,447 INFO L85 PathProgramCache]: Analyzing trace with hash -407976094, now seen corresponding path program 1 times [2024-10-11 14:28:19,462 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 14:28:19,462 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1439476468] [2024-10-11 14:28:19,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 14:28:19,462 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 14:28:19,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 14:28:19,910 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 14:28:19,911 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 14:28:19,911 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1439476468] [2024-10-11 14:28:19,911 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1439476468] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-11 14:28:19,911 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-11 14:28:19,911 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-10-11 14:28:19,913 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [826617766] [2024-10-11 14:28:19,914 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-11 14:28:19,920 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-11 14:28:19,924 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 14:28:19,947 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-11 14:28:19,948 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-11 14:28:19,949 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 18 [2024-10-11 14:28:19,951 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 20 places, 15 transitions, 42 flow. Second operand has 3 states, 3 states have (on average 7.0) internal successors, (21), 3 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 14:28:19,951 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 14:28:19,951 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 18 [2024-10-11 14:28:19,952 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 14:28:20,019 INFO L124 PetriNetUnfolderBase]: 68/123 cut-off events. [2024-10-11 14:28:20,020 INFO L125 PetriNetUnfolderBase]: For 14/14 co-relation queries the response was YES. [2024-10-11 14:28:20,022 INFO L83 FinitePrefix]: Finished finitePrefix Result has 269 conditions, 123 events. 68/123 cut-off events. For 14/14 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 325 event pairs, 22 based on Foata normal form. 1/94 useless extension candidates. Maximal degree in co-relation 220. Up to 72 conditions per place. [2024-10-11 14:28:20,025 INFO L140 encePairwiseOnDemand]: 14/18 looper letters, 21 selfloop transitions, 3 changer transitions 1/26 dead transitions. [2024-10-11 14:28:20,025 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 22 places, 26 transitions, 123 flow [2024-10-11 14:28:20,026 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-11 14:28:20,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-10-11 14:28:20,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 35 transitions. [2024-10-11 14:28:20,035 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6481481481481481 [2024-10-11 14:28:20,036 INFO L175 Difference]: Start difference. First operand has 20 places, 15 transitions, 42 flow. Second operand 3 states and 35 transitions. [2024-10-11 14:28:20,037 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 22 places, 26 transitions, 123 flow [2024-10-11 14:28:20,039 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 18 places, 26 transitions, 109 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-10-11 14:28:20,040 INFO L231 Difference]: Finished difference. Result has 19 places, 17 transitions, 53 flow [2024-10-11 14:28:20,042 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=18, PETRI_DIFFERENCE_MINUEND_FLOW=34, PETRI_DIFFERENCE_MINUEND_PLACES=16, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=15, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=12, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=53, PETRI_PLACES=19, PETRI_TRANSITIONS=17} [2024-10-11 14:28:20,045 INFO L277 CegarLoopForPetriNet]: 20 programPoint places, -1 predicate places. [2024-10-11 14:28:20,046 INFO L471 AbstractCegarLoop]: Abstraction has has 19 places, 17 transitions, 53 flow [2024-10-11 14:28:20,046 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 7.0) internal successors, (21), 3 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 14:28:20,046 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 14:28:20,046 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 14:28:20,047 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-10-11 14:28:20,047 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-11 14:28:20,047 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 14:28:20,048 INFO L85 PathProgramCache]: Analyzing trace with hash 859169077, now seen corresponding path program 1 times [2024-10-11 14:28:20,048 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 14:28:20,048 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1734615192] [2024-10-11 14:28:20,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 14:28:20,049 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 14:28:20,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 14:28:20,395 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 14:28:20,396 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 14:28:20,396 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1734615192] [2024-10-11 14:28:20,396 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1734615192] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-11 14:28:20,396 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [103218559] [2024-10-11 14:28:20,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 14:28:20,397 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 14:28:20,397 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 14:28:20,398 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-11 14:28:20,400 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-10-11 14:28:20,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 14:28:20,462 INFO L255 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-10-11 14:28:20,466 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 14:28:20,570 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 14:28:20,571 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-11 14:28:20,763 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 14:28:20,763 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [103218559] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-11 14:28:20,763 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-11 14:28:20,763 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 4] total 8 [2024-10-11 14:28:20,764 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1523333111] [2024-10-11 14:28:20,764 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-11 14:28:20,764 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-10-11 14:28:20,765 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 14:28:20,765 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-10-11 14:28:20,765 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2024-10-11 14:28:20,765 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 18 [2024-10-11 14:28:20,766 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 19 places, 17 transitions, 53 flow. Second operand has 9 states, 9 states have (on average 6.0) internal successors, (54), 9 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 14:28:20,766 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 14:28:20,766 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 18 [2024-10-11 14:28:20,766 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 14:28:20,903 INFO L124 PetriNetUnfolderBase]: 70/131 cut-off events. [2024-10-11 14:28:20,903 INFO L125 PetriNetUnfolderBase]: For 15/15 co-relation queries the response was YES. [2024-10-11 14:28:20,904 INFO L83 FinitePrefix]: Finished finitePrefix Result has 320 conditions, 131 events. 70/131 cut-off events. For 15/15 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 349 event pairs, 12 based on Foata normal form. 1/132 useless extension candidates. Maximal degree in co-relation 104. Up to 70 conditions per place. [2024-10-11 14:28:20,905 INFO L140 encePairwiseOnDemand]: 12/18 looper letters, 23 selfloop transitions, 5 changer transitions 12/41 dead transitions. [2024-10-11 14:28:20,905 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 24 places, 41 transitions, 196 flow [2024-10-11 14:28:20,907 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-10-11 14:28:20,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-10-11 14:28:20,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 59 transitions. [2024-10-11 14:28:20,909 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5462962962962963 [2024-10-11 14:28:20,909 INFO L175 Difference]: Start difference. First operand has 19 places, 17 transitions, 53 flow. Second operand 6 states and 59 transitions. [2024-10-11 14:28:20,909 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 24 places, 41 transitions, 196 flow [2024-10-11 14:28:20,910 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 23 places, 41 transitions, 191 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-10-11 14:28:20,912 INFO L231 Difference]: Finished difference. Result has 26 places, 19 transitions, 78 flow [2024-10-11 14:28:20,912 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=18, PETRI_DIFFERENCE_MINUEND_FLOW=50, PETRI_DIFFERENCE_MINUEND_PLACES=18, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=17, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=13, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=78, PETRI_PLACES=26, PETRI_TRANSITIONS=19} [2024-10-11 14:28:20,912 INFO L277 CegarLoopForPetriNet]: 20 programPoint places, 6 predicate places. [2024-10-11 14:28:20,913 INFO L471 AbstractCegarLoop]: Abstraction has has 26 places, 19 transitions, 78 flow [2024-10-11 14:28:20,913 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 6.0) internal successors, (54), 9 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 14:28:20,913 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 14:28:20,913 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 14:28:20,927 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2024-10-11 14:28:21,114 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 14:28:21,115 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-11 14:28:21,116 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 14:28:21,116 INFO L85 PathProgramCache]: Analyzing trace with hash 2096555247, now seen corresponding path program 2 times [2024-10-11 14:28:21,116 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 14:28:21,116 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1383692646] [2024-10-11 14:28:21,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 14:28:21,120 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 14:28:21,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 14:28:21,364 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 14:28:21,364 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 14:28:21,364 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1383692646] [2024-10-11 14:28:21,364 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1383692646] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-11 14:28:21,364 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [440710358] [2024-10-11 14:28:21,365 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-11 14:28:21,365 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 14:28:21,365 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 14:28:21,367 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-11 14:28:21,369 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-10-11 14:28:21,418 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-11 14:28:21,419 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-11 14:28:21,420 INFO L255 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-10-11 14:28:21,421 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 14:28:21,502 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 14:28:21,503 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-11 14:28:21,583 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 14:28:21,584 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [440710358] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-11 14:28:21,584 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-11 14:28:21,584 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 4] total 10 [2024-10-11 14:28:21,585 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2020993508] [2024-10-11 14:28:21,585 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-11 14:28:21,585 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-10-11 14:28:21,585 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 14:28:21,586 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-10-11 14:28:21,586 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2024-10-11 14:28:21,586 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 18 [2024-10-11 14:28:21,586 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 26 places, 19 transitions, 78 flow. Second operand has 11 states, 11 states have (on average 5.7272727272727275) internal successors, (63), 11 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 14:28:21,587 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 14:28:21,587 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 18 [2024-10-11 14:28:21,587 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 14:28:21,754 INFO L124 PetriNetUnfolderBase]: 113/210 cut-off events. [2024-10-11 14:28:21,754 INFO L125 PetriNetUnfolderBase]: For 79/79 co-relation queries the response was YES. [2024-10-11 14:28:21,755 INFO L83 FinitePrefix]: Finished finitePrefix Result has 572 conditions, 210 events. 113/210 cut-off events. For 79/79 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 668 event pairs, 17 based on Foata normal form. 3/213 useless extension candidates. Maximal degree in co-relation 555. Up to 87 conditions per place. [2024-10-11 14:28:21,756 INFO L140 encePairwiseOnDemand]: 12/18 looper letters, 36 selfloop transitions, 17 changer transitions 9/63 dead transitions. [2024-10-11 14:28:21,756 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 33 places, 63 transitions, 333 flow [2024-10-11 14:28:21,757 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-10-11 14:28:21,757 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-10-11 14:28:21,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 94 transitions. [2024-10-11 14:28:21,758 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5222222222222223 [2024-10-11 14:28:21,758 INFO L175 Difference]: Start difference. First operand has 26 places, 19 transitions, 78 flow. Second operand 10 states and 94 transitions. [2024-10-11 14:28:21,758 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 33 places, 63 transitions, 333 flow [2024-10-11 14:28:21,759 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 30 places, 63 transitions, 315 flow, removed 5 selfloop flow, removed 3 redundant places. [2024-10-11 14:28:21,760 INFO L231 Difference]: Finished difference. Result has 35 places, 31 transitions, 175 flow [2024-10-11 14:28:21,760 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=18, PETRI_DIFFERENCE_MINUEND_FLOW=64, PETRI_DIFFERENCE_MINUEND_PLACES=21, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=19, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=11, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=175, PETRI_PLACES=35, PETRI_TRANSITIONS=31} [2024-10-11 14:28:21,761 INFO L277 CegarLoopForPetriNet]: 20 programPoint places, 15 predicate places. [2024-10-11 14:28:21,761 INFO L471 AbstractCegarLoop]: Abstraction has has 35 places, 31 transitions, 175 flow [2024-10-11 14:28:21,761 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 5.7272727272727275) internal successors, (63), 11 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 14:28:21,761 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 14:28:21,761 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 14:28:21,773 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-10-11 14:28:21,965 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 14:28:21,966 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-11 14:28:21,966 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 14:28:21,966 INFO L85 PathProgramCache]: Analyzing trace with hash 221933866, now seen corresponding path program 1 times [2024-10-11 14:28:21,966 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 14:28:21,967 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [94903157] [2024-10-11 14:28:21,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 14:28:21,967 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 14:28:21,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 14:28:22,096 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 14:28:22,097 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 14:28:22,097 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [94903157] [2024-10-11 14:28:22,097 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [94903157] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-11 14:28:22,097 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1204498862] [2024-10-11 14:28:22,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 14:28:22,097 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 14:28:22,099 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 14:28:22,100 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-11 14:28:22,101 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-10-11 14:28:22,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 14:28:22,141 INFO L255 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-10-11 14:28:22,142 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 14:28:22,197 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 14:28:22,198 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-11 14:28:22,333 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 14:28:22,334 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1204498862] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-11 14:28:22,334 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-11 14:28:22,334 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 4] total 9 [2024-10-11 14:28:22,335 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [744948599] [2024-10-11 14:28:22,335 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-11 14:28:22,335 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-10-11 14:28:22,335 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 14:28:22,336 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-10-11 14:28:22,336 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2024-10-11 14:28:22,338 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 18 [2024-10-11 14:28:22,338 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 35 places, 31 transitions, 175 flow. Second operand has 10 states, 10 states have (on average 6.1) internal successors, (61), 10 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 14:28:22,338 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 14:28:22,338 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 18 [2024-10-11 14:28:22,338 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 14:28:22,462 INFO L124 PetriNetUnfolderBase]: 117/221 cut-off events. [2024-10-11 14:28:22,462 INFO L125 PetriNetUnfolderBase]: For 227/227 co-relation queries the response was YES. [2024-10-11 14:28:22,462 INFO L83 FinitePrefix]: Finished finitePrefix Result has 730 conditions, 221 events. 117/221 cut-off events. For 227/227 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 747 event pairs, 19 based on Foata normal form. 1/222 useless extension candidates. Maximal degree in co-relation 675. Up to 171 conditions per place. [2024-10-11 14:28:22,464 INFO L140 encePairwiseOnDemand]: 12/18 looper letters, 33 selfloop transitions, 6 changer transitions 12/52 dead transitions. [2024-10-11 14:28:22,464 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 40 places, 52 transitions, 349 flow [2024-10-11 14:28:22,464 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-10-11 14:28:22,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-10-11 14:28:22,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 57 transitions. [2024-10-11 14:28:22,465 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5277777777777778 [2024-10-11 14:28:22,465 INFO L175 Difference]: Start difference. First operand has 35 places, 31 transitions, 175 flow. Second operand 6 states and 57 transitions. [2024-10-11 14:28:22,465 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 40 places, 52 transitions, 349 flow [2024-10-11 14:28:22,467 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 36 places, 52 transitions, 295 flow, removed 18 selfloop flow, removed 4 redundant places. [2024-10-11 14:28:22,468 INFO L231 Difference]: Finished difference. Result has 39 places, 33 transitions, 159 flow [2024-10-11 14:28:22,468 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=18, PETRI_DIFFERENCE_MINUEND_FLOW=129, PETRI_DIFFERENCE_MINUEND_PLACES=31, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=31, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=159, PETRI_PLACES=39, PETRI_TRANSITIONS=33} [2024-10-11 14:28:22,469 INFO L277 CegarLoopForPetriNet]: 20 programPoint places, 19 predicate places. [2024-10-11 14:28:22,469 INFO L471 AbstractCegarLoop]: Abstraction has has 39 places, 33 transitions, 159 flow [2024-10-11 14:28:22,469 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 6.1) internal successors, (61), 10 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 14:28:22,469 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 14:28:22,469 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 14:28:22,482 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-10-11 14:28:22,673 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 14:28:22,674 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-11 14:28:22,674 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 14:28:22,674 INFO L85 PathProgramCache]: Analyzing trace with hash -8456190, now seen corresponding path program 2 times [2024-10-11 14:28:22,674 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 14:28:22,674 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1713493855] [2024-10-11 14:28:22,675 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 14:28:22,675 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 14:28:22,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 14:28:22,787 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 14:28:22,787 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 14:28:22,787 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1713493855] [2024-10-11 14:28:22,787 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1713493855] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-11 14:28:22,787 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1896061087] [2024-10-11 14:28:22,787 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-11 14:28:22,787 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 14:28:22,788 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 14:28:22,789 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-11 14:28:22,790 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-10-11 14:28:22,826 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-11 14:28:22,826 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-11 14:28:22,827 INFO L255 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-10-11 14:28:22,828 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 14:28:22,919 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 14:28:22,919 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-11 14:28:23,054 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 14:28:23,054 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1896061087] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-11 14:28:23,055 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-11 14:28:23,055 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 7, 5] total 13 [2024-10-11 14:28:23,055 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2100174402] [2024-10-11 14:28:23,055 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-11 14:28:23,055 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-10-11 14:28:23,055 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 14:28:23,056 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-10-11 14:28:23,056 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=115, Unknown=0, NotChecked=0, Total=182 [2024-10-11 14:28:23,056 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 18 [2024-10-11 14:28:23,056 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 39 places, 33 transitions, 159 flow. Second operand has 14 states, 14 states have (on average 5.285714285714286) internal successors, (74), 14 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 14:28:23,056 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 14:28:23,056 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 18 [2024-10-11 14:28:23,056 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 14:28:23,227 INFO L124 PetriNetUnfolderBase]: 131/242 cut-off events. [2024-10-11 14:28:23,227 INFO L125 PetriNetUnfolderBase]: For 235/235 co-relation queries the response was YES. [2024-10-11 14:28:23,228 INFO L83 FinitePrefix]: Finished finitePrefix Result has 769 conditions, 242 events. 131/242 cut-off events. For 235/235 co-relation queries the response was YES. Maximal size of possible extension queue 23. Compared 836 event pairs, 20 based on Foata normal form. 2/244 useless extension candidates. Maximal degree in co-relation 743. Up to 185 conditions per place. [2024-10-11 14:28:23,228 INFO L140 encePairwiseOnDemand]: 11/18 looper letters, 41 selfloop transitions, 17 changer transitions 4/63 dead transitions. [2024-10-11 14:28:23,229 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 63 transitions, 396 flow [2024-10-11 14:28:23,229 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-10-11 14:28:23,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-10-11 14:28:23,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 82 transitions. [2024-10-11 14:28:23,230 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.45555555555555555 [2024-10-11 14:28:23,230 INFO L175 Difference]: Start difference. First operand has 39 places, 33 transitions, 159 flow. Second operand 10 states and 82 transitions. [2024-10-11 14:28:23,230 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 63 transitions, 396 flow [2024-10-11 14:28:23,231 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 63 transitions, 385 flow, removed 3 selfloop flow, removed 2 redundant places. [2024-10-11 14:28:23,232 INFO L231 Difference]: Finished difference. Result has 46 places, 43 transitions, 239 flow [2024-10-11 14:28:23,232 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=18, PETRI_DIFFERENCE_MINUEND_FLOW=148, PETRI_DIFFERENCE_MINUEND_PLACES=35, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=239, PETRI_PLACES=46, PETRI_TRANSITIONS=43} [2024-10-11 14:28:23,233 INFO L277 CegarLoopForPetriNet]: 20 programPoint places, 26 predicate places. [2024-10-11 14:28:23,233 INFO L471 AbstractCegarLoop]: Abstraction has has 46 places, 43 transitions, 239 flow [2024-10-11 14:28:23,233 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 5.285714285714286) internal successors, (74), 14 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 14:28:23,233 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 14:28:23,233 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 14:28:23,245 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-10-11 14:28:23,437 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 14:28:23,438 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-11 14:28:23,438 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 14:28:23,438 INFO L85 PathProgramCache]: Analyzing trace with hash -1153214561, now seen corresponding path program 3 times [2024-10-11 14:28:23,438 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 14:28:23,439 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1247546170] [2024-10-11 14:28:23,439 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 14:28:23,439 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 14:28:23,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 14:28:23,576 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 14:28:23,577 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 14:28:23,577 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1247546170] [2024-10-11 14:28:23,577 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1247546170] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-11 14:28:23,577 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [13841858] [2024-10-11 14:28:23,577 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-10-11 14:28:23,577 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 14:28:23,578 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 14:28:23,579 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-11 14:28:23,580 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-10-11 14:28:23,617 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-10-11 14:28:23,617 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-11 14:28:23,619 INFO L255 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-10-11 14:28:23,619 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 14:28:23,669 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 14:28:23,669 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-11 14:28:23,785 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 14:28:23,786 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [13841858] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-11 14:28:23,786 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-11 14:28:23,786 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 4] total 9 [2024-10-11 14:28:23,786 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [961344342] [2024-10-11 14:28:23,786 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-11 14:28:23,787 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-10-11 14:28:23,787 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 14:28:23,787 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-10-11 14:28:23,787 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2024-10-11 14:28:23,788 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 18 [2024-10-11 14:28:23,788 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 43 transitions, 239 flow. Second operand has 10 states, 10 states have (on average 5.9) internal successors, (59), 10 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 14:28:23,788 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 14:28:23,788 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 18 [2024-10-11 14:28:23,788 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 14:28:23,893 INFO L124 PetriNetUnfolderBase]: 145/265 cut-off events. [2024-10-11 14:28:23,893 INFO L125 PetriNetUnfolderBase]: For 397/397 co-relation queries the response was YES. [2024-10-11 14:28:23,894 INFO L83 FinitePrefix]: Finished finitePrefix Result has 933 conditions, 265 events. 145/265 cut-off events. For 397/397 co-relation queries the response was YES. Maximal size of possible extension queue 26. Compared 936 event pairs, 26 based on Foata normal form. 2/265 useless extension candidates. Maximal degree in co-relation 880. Up to 209 conditions per place. [2024-10-11 14:28:23,895 INFO L140 encePairwiseOnDemand]: 12/18 looper letters, 46 selfloop transitions, 15 changer transitions 6/68 dead transitions. [2024-10-11 14:28:23,895 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 68 transitions, 474 flow [2024-10-11 14:28:23,896 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-10-11 14:28:23,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-10-11 14:28:23,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 72 transitions. [2024-10-11 14:28:23,896 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5 [2024-10-11 14:28:23,897 INFO L175 Difference]: Start difference. First operand has 46 places, 43 transitions, 239 flow. Second operand 8 states and 72 transitions. [2024-10-11 14:28:23,897 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 68 transitions, 474 flow [2024-10-11 14:28:23,898 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 48 places, 68 transitions, 421 flow, removed 15 selfloop flow, removed 5 redundant places. [2024-10-11 14:28:23,899 INFO L231 Difference]: Finished difference. Result has 51 places, 50 transitions, 286 flow [2024-10-11 14:28:23,899 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=18, PETRI_DIFFERENCE_MINUEND_FLOW=194, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=286, PETRI_PLACES=51, PETRI_TRANSITIONS=50} [2024-10-11 14:28:23,900 INFO L277 CegarLoopForPetriNet]: 20 programPoint places, 31 predicate places. [2024-10-11 14:28:23,900 INFO L471 AbstractCegarLoop]: Abstraction has has 51 places, 50 transitions, 286 flow [2024-10-11 14:28:23,900 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 5.9) internal successors, (59), 10 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 14:28:23,900 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 14:28:23,900 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 14:28:23,913 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-10-11 14:28:24,101 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 14:28:24,101 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-11 14:28:24,102 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 14:28:24,102 INFO L85 PathProgramCache]: Analyzing trace with hash -1342781756, now seen corresponding path program 3 times [2024-10-11 14:28:24,102 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 14:28:24,102 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [36960188] [2024-10-11 14:28:24,102 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 14:28:24,102 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 14:28:24,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 14:28:24,249 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 14:28:24,249 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 14:28:24,250 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [36960188] [2024-10-11 14:28:24,250 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [36960188] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-11 14:28:24,250 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1909201147] [2024-10-11 14:28:24,250 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-10-11 14:28:24,250 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 14:28:24,250 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 14:28:24,251 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-11 14:28:24,252 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-10-11 14:28:24,290 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-10-11 14:28:24,291 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-11 14:28:24,291 INFO L255 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-10-11 14:28:24,293 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 14:28:24,371 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 14:28:24,371 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-11 14:28:24,467 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 14:28:24,468 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1909201147] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-11 14:28:24,468 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-11 14:28:24,468 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 7, 5] total 13 [2024-10-11 14:28:24,468 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [712793721] [2024-10-11 14:28:24,468 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-11 14:28:24,468 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-10-11 14:28:24,469 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 14:28:24,469 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-10-11 14:28:24,469 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=118, Unknown=0, NotChecked=0, Total=182 [2024-10-11 14:28:24,469 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 18 [2024-10-11 14:28:24,470 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 50 transitions, 286 flow. Second operand has 14 states, 14 states have (on average 5.214285714285714) internal successors, (73), 14 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 14:28:24,470 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 14:28:24,470 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 18 [2024-10-11 14:28:24,470 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 14:28:24,656 INFO L124 PetriNetUnfolderBase]: 183/336 cut-off events. [2024-10-11 14:28:24,656 INFO L125 PetriNetUnfolderBase]: For 696/696 co-relation queries the response was YES. [2024-10-11 14:28:24,657 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1232 conditions, 336 events. 183/336 cut-off events. For 696/696 co-relation queries the response was YES. Maximal size of possible extension queue 35. Compared 1287 event pairs, 33 based on Foata normal form. 3/337 useless extension candidates. Maximal degree in co-relation 1176. Up to 238 conditions per place. [2024-10-11 14:28:24,658 INFO L140 encePairwiseOnDemand]: 11/18 looper letters, 55 selfloop transitions, 22 changer transitions 7/85 dead transitions. [2024-10-11 14:28:24,659 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 85 transitions, 635 flow [2024-10-11 14:28:24,659 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-10-11 14:28:24,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-10-11 14:28:24,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 93 transitions. [2024-10-11 14:28:24,660 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4696969696969697 [2024-10-11 14:28:24,660 INFO L175 Difference]: Start difference. First operand has 51 places, 50 transitions, 286 flow. Second operand 11 states and 93 transitions. [2024-10-11 14:28:24,660 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 85 transitions, 635 flow [2024-10-11 14:28:24,663 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 85 transitions, 585 flow, removed 18 selfloop flow, removed 3 redundant places. [2024-10-11 14:28:24,664 INFO L231 Difference]: Finished difference. Result has 61 places, 61 transitions, 386 flow [2024-10-11 14:28:24,664 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=18, PETRI_DIFFERENCE_MINUEND_FLOW=248, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=386, PETRI_PLACES=61, PETRI_TRANSITIONS=61} [2024-10-11 14:28:24,665 INFO L277 CegarLoopForPetriNet]: 20 programPoint places, 41 predicate places. [2024-10-11 14:28:24,665 INFO L471 AbstractCegarLoop]: Abstraction has has 61 places, 61 transitions, 386 flow [2024-10-11 14:28:24,665 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 5.214285714285714) internal successors, (73), 14 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 14:28:24,665 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 14:28:24,666 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 14:28:24,678 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2024-10-11 14:28:24,866 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2024-10-11 14:28:24,867 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-11 14:28:24,867 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 14:28:24,867 INFO L85 PathProgramCache]: Analyzing trace with hash 535451419, now seen corresponding path program 1 times [2024-10-11 14:28:24,867 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 14:28:24,867 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2122203257] [2024-10-11 14:28:24,867 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 14:28:24,867 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 14:28:24,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 14:28:25,167 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 14:28:25,168 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 14:28:25,168 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2122203257] [2024-10-11 14:28:25,168 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2122203257] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-11 14:28:25,168 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [324685012] [2024-10-11 14:28:25,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 14:28:25,168 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 14:28:25,168 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 14:28:25,171 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-11 14:28:25,172 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-10-11 14:28:25,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 14:28:25,229 INFO L255 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 21 conjuncts are in the unsatisfiable core [2024-10-11 14:28:25,230 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 14:28:25,399 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 14:28:25,399 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-11 14:28:25,859 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 14:28:25,859 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [324685012] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-11 14:28:25,859 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-11 14:28:25,859 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 18 [2024-10-11 14:28:25,859 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1514586946] [2024-10-11 14:28:25,860 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-11 14:28:25,860 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-10-11 14:28:25,860 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 14:28:25,860 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-10-11 14:28:25,861 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=270, Unknown=0, NotChecked=0, Total=342 [2024-10-11 14:28:25,862 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 18 [2024-10-11 14:28:25,862 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 61 transitions, 386 flow. Second operand has 19 states, 19 states have (on average 4.7368421052631575) internal successors, (90), 19 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 14:28:25,862 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 14:28:25,862 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 18 [2024-10-11 14:28:25,862 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 14:28:26,812 INFO L124 PetriNetUnfolderBase]: 253/483 cut-off events. [2024-10-11 14:28:26,813 INFO L125 PetriNetUnfolderBase]: For 943/943 co-relation queries the response was YES. [2024-10-11 14:28:26,814 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1794 conditions, 483 events. 253/483 cut-off events. For 943/943 co-relation queries the response was YES. Maximal size of possible extension queue 51. Compared 2175 event pairs, 23 based on Foata normal form. 3/484 useless extension candidates. Maximal degree in co-relation 1690. Up to 237 conditions per place. [2024-10-11 14:28:26,816 INFO L140 encePairwiseOnDemand]: 10/18 looper letters, 83 selfloop transitions, 50 changer transitions 30/164 dead transitions. [2024-10-11 14:28:26,816 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 84 places, 164 transitions, 1170 flow [2024-10-11 14:28:26,816 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2024-10-11 14:28:26,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2024-10-11 14:28:26,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 199 transitions. [2024-10-11 14:28:26,817 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.46064814814814814 [2024-10-11 14:28:26,817 INFO L175 Difference]: Start difference. First operand has 61 places, 61 transitions, 386 flow. Second operand 24 states and 199 transitions. [2024-10-11 14:28:26,817 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 84 places, 164 transitions, 1170 flow [2024-10-11 14:28:26,822 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 80 places, 164 transitions, 1102 flow, removed 27 selfloop flow, removed 4 redundant places. [2024-10-11 14:28:26,825 INFO L231 Difference]: Finished difference. Result has 90 places, 88 transitions, 636 flow [2024-10-11 14:28:26,826 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=18, PETRI_DIFFERENCE_MINUEND_FLOW=318, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=61, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=636, PETRI_PLACES=90, PETRI_TRANSITIONS=88} [2024-10-11 14:28:26,828 INFO L277 CegarLoopForPetriNet]: 20 programPoint places, 70 predicate places. [2024-10-11 14:28:26,828 INFO L471 AbstractCegarLoop]: Abstraction has has 90 places, 88 transitions, 636 flow [2024-10-11 14:28:26,828 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 4.7368421052631575) internal successors, (90), 19 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 14:28:26,828 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 14:28:26,828 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 14:28:26,842 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2024-10-11 14:28:27,028 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 14:28:27,029 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-11 14:28:27,029 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 14:28:27,029 INFO L85 PathProgramCache]: Analyzing trace with hash -1111703867, now seen corresponding path program 2 times [2024-10-11 14:28:27,029 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 14:28:27,029 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2124863603] [2024-10-11 14:28:27,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 14:28:27,030 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 14:28:27,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 14:28:27,349 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 14:28:27,349 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 14:28:27,349 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2124863603] [2024-10-11 14:28:27,349 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2124863603] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-11 14:28:27,349 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [884078849] [2024-10-11 14:28:27,349 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-11 14:28:27,349 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 14:28:27,349 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 14:28:27,351 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-11 14:28:27,352 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-10-11 14:28:27,387 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-11 14:28:27,387 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-11 14:28:27,388 INFO L255 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 21 conjuncts are in the unsatisfiable core [2024-10-11 14:28:27,389 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 14:28:27,582 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 14:28:27,582 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-11 14:28:27,978 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 14:28:27,978 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [884078849] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-11 14:28:27,978 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-11 14:28:27,978 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 18 [2024-10-11 14:28:27,978 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [28457278] [2024-10-11 14:28:27,978 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-11 14:28:27,979 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-10-11 14:28:27,979 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 14:28:27,979 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-10-11 14:28:27,979 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=266, Unknown=0, NotChecked=0, Total=342 [2024-10-11 14:28:27,979 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 18 [2024-10-11 14:28:27,980 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 90 places, 88 transitions, 636 flow. Second operand has 19 states, 19 states have (on average 4.7368421052631575) internal successors, (90), 19 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 14:28:27,980 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 14:28:27,980 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 18 [2024-10-11 14:28:27,980 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 14:28:28,869 INFO L124 PetriNetUnfolderBase]: 283/544 cut-off events. [2024-10-11 14:28:28,870 INFO L125 PetriNetUnfolderBase]: For 2721/2721 co-relation queries the response was YES. [2024-10-11 14:28:28,872 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2549 conditions, 544 events. 283/544 cut-off events. For 2721/2721 co-relation queries the response was YES. Maximal size of possible extension queue 61. Compared 2599 event pairs, 20 based on Foata normal form. 3/545 useless extension candidates. Maximal degree in co-relation 2442. Up to 246 conditions per place. [2024-10-11 14:28:28,874 INFO L140 encePairwiseOnDemand]: 10/18 looper letters, 83 selfloop transitions, 74 changer transitions 16/174 dead transitions. [2024-10-11 14:28:28,874 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 110 places, 174 transitions, 1563 flow [2024-10-11 14:28:28,874 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2024-10-11 14:28:28,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2024-10-11 14:28:28,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 203 transitions. [2024-10-11 14:28:28,875 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.45111111111111113 [2024-10-11 14:28:28,875 INFO L175 Difference]: Start difference. First operand has 90 places, 88 transitions, 636 flow. Second operand 25 states and 203 transitions. [2024-10-11 14:28:28,876 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 110 places, 174 transitions, 1563 flow [2024-10-11 14:28:28,883 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 98 places, 174 transitions, 1377 flow, removed 74 selfloop flow, removed 12 redundant places. [2024-10-11 14:28:28,885 INFO L231 Difference]: Finished difference. Result has 108 places, 114 transitions, 1041 flow [2024-10-11 14:28:28,886 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=18, PETRI_DIFFERENCE_MINUEND_FLOW=500, PETRI_DIFFERENCE_MINUEND_PLACES=74, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=88, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=25, PETRI_FLOW=1041, PETRI_PLACES=108, PETRI_TRANSITIONS=114} [2024-10-11 14:28:28,886 INFO L277 CegarLoopForPetriNet]: 20 programPoint places, 88 predicate places. [2024-10-11 14:28:28,886 INFO L471 AbstractCegarLoop]: Abstraction has has 108 places, 114 transitions, 1041 flow [2024-10-11 14:28:28,886 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 4.7368421052631575) internal successors, (90), 19 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 14:28:28,887 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 14:28:28,887 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 14:28:28,901 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2024-10-11 14:28:29,092 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,9 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 14:28:29,093 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-11 14:28:29,094 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 14:28:29,094 INFO L85 PathProgramCache]: Analyzing trace with hash -1190352107, now seen corresponding path program 3 times [2024-10-11 14:28:29,094 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 14:28:29,094 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1899524757] [2024-10-11 14:28:29,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 14:28:29,094 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 14:28:29,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 14:28:29,410 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 14:28:29,411 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 14:28:29,411 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1899524757] [2024-10-11 14:28:29,411 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1899524757] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-11 14:28:29,411 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1587349554] [2024-10-11 14:28:29,411 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-10-11 14:28:29,411 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 14:28:29,412 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 14:28:29,413 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-11 14:28:29,414 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-10-11 14:28:29,449 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-10-11 14:28:29,450 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-11 14:28:29,450 INFO L255 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 21 conjuncts are in the unsatisfiable core [2024-10-11 14:28:29,451 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 14:28:29,673 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 14:28:29,674 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-11 14:28:30,055 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 14:28:30,055 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1587349554] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-11 14:28:30,055 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-11 14:28:30,055 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 18 [2024-10-11 14:28:30,055 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [365618250] [2024-10-11 14:28:30,056 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-11 14:28:30,056 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-10-11 14:28:30,056 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 14:28:30,056 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-10-11 14:28:30,056 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=263, Unknown=0, NotChecked=0, Total=342 [2024-10-11 14:28:30,057 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 18 [2024-10-11 14:28:30,057 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 108 places, 114 transitions, 1041 flow. Second operand has 19 states, 19 states have (on average 4.7894736842105265) internal successors, (91), 19 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 14:28:30,057 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 14:28:30,057 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 18 [2024-10-11 14:28:30,057 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 14:28:30,965 INFO L124 PetriNetUnfolderBase]: 286/554 cut-off events. [2024-10-11 14:28:30,965 INFO L125 PetriNetUnfolderBase]: For 3423/3423 co-relation queries the response was YES. [2024-10-11 14:28:30,967 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2868 conditions, 554 events. 286/554 cut-off events. For 3423/3423 co-relation queries the response was YES. Maximal size of possible extension queue 62. Compared 2648 event pairs, 20 based on Foata normal form. 3/553 useless extension candidates. Maximal degree in co-relation 2787. Up to 252 conditions per place. [2024-10-11 14:28:30,970 INFO L140 encePairwiseOnDemand]: 10/18 looper letters, 88 selfloop transitions, 79 changer transitions 14/182 dead transitions. [2024-10-11 14:28:30,970 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 130 places, 182 transitions, 1817 flow [2024-10-11 14:28:30,970 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2024-10-11 14:28:30,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2024-10-11 14:28:30,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 211 transitions. [2024-10-11 14:28:30,973 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.45085470085470086 [2024-10-11 14:28:30,973 INFO L175 Difference]: Start difference. First operand has 108 places, 114 transitions, 1041 flow. Second operand 26 states and 211 transitions. [2024-10-11 14:28:30,973 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 130 places, 182 transitions, 1817 flow [2024-10-11 14:28:30,983 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 118 places, 182 transitions, 1466 flow, removed 158 selfloop flow, removed 12 redundant places. [2024-10-11 14:28:30,988 INFO L231 Difference]: Finished difference. Result has 122 places, 122 transitions, 1069 flow [2024-10-11 14:28:30,988 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=18, PETRI_DIFFERENCE_MINUEND_FLOW=798, PETRI_DIFFERENCE_MINUEND_PLACES=93, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=114, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=72, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=26, PETRI_FLOW=1069, PETRI_PLACES=122, PETRI_TRANSITIONS=122} [2024-10-11 14:28:30,988 INFO L277 CegarLoopForPetriNet]: 20 programPoint places, 102 predicate places. [2024-10-11 14:28:30,989 INFO L471 AbstractCegarLoop]: Abstraction has has 122 places, 122 transitions, 1069 flow [2024-10-11 14:28:30,989 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 4.7894736842105265) internal successors, (91), 19 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 14:28:30,989 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 14:28:30,989 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 14:28:31,005 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2024-10-11 14:28:31,193 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,10 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 14:28:31,194 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-11 14:28:31,194 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 14:28:31,194 INFO L85 PathProgramCache]: Analyzing trace with hash -1252462391, now seen corresponding path program 4 times [2024-10-11 14:28:31,194 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 14:28:31,194 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1616863071] [2024-10-11 14:28:31,195 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 14:28:31,195 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 14:28:31,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 14:28:31,459 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 14:28:31,459 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 14:28:31,459 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1616863071] [2024-10-11 14:28:31,459 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1616863071] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-11 14:28:31,459 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [475891730] [2024-10-11 14:28:31,459 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-10-11 14:28:31,460 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 14:28:31,460 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 14:28:31,461 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-11 14:28:31,462 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-10-11 14:28:31,504 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-10-11 14:28:31,504 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-11 14:28:31,505 INFO L255 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 21 conjuncts are in the unsatisfiable core [2024-10-11 14:28:31,506 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 14:28:31,598 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 14:28:31,598 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-11 14:28:32,337 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 14:28:32,338 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [475891730] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-11 14:28:32,338 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-11 14:28:32,338 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 17 [2024-10-11 14:28:32,338 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [469387047] [2024-10-11 14:28:32,338 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-11 14:28:32,338 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-10-11 14:28:32,339 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 14:28:32,339 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-10-11 14:28:32,339 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=235, Unknown=0, NotChecked=0, Total=306 [2024-10-11 14:28:32,339 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 18 [2024-10-11 14:28:32,339 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 122 places, 122 transitions, 1069 flow. Second operand has 18 states, 18 states have (on average 4.833333333333333) internal successors, (87), 18 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) [2024-10-11 14:28:32,339 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 14:28:32,339 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 18 [2024-10-11 14:28:32,339 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 14:28:32,836 INFO L124 PetriNetUnfolderBase]: 327/630 cut-off events. [2024-10-11 14:28:32,836 INFO L125 PetriNetUnfolderBase]: For 2238/2238 co-relation queries the response was YES. [2024-10-11 14:28:32,839 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3057 conditions, 630 events. 327/630 cut-off events. For 2238/2238 co-relation queries the response was YES. Maximal size of possible extension queue 71. Compared 3108 event pairs, 37 based on Foata normal form. 3/619 useless extension candidates. Maximal degree in co-relation 3009. Up to 504 conditions per place. [2024-10-11 14:28:32,841 INFO L140 encePairwiseOnDemand]: 10/18 looper letters, 131 selfloop transitions, 37 changer transitions 14/183 dead transitions. [2024-10-11 14:28:32,843 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 135 places, 183 transitions, 1827 flow [2024-10-11 14:28:32,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-10-11 14:28:32,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2024-10-11 14:28:32,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 131 transitions. [2024-10-11 14:28:32,844 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4548611111111111 [2024-10-11 14:28:32,844 INFO L175 Difference]: Start difference. First operand has 122 places, 122 transitions, 1069 flow. Second operand 16 states and 131 transitions. [2024-10-11 14:28:32,845 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 135 places, 183 transitions, 1827 flow [2024-10-11 14:28:32,853 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 112 places, 183 transitions, 1577 flow, removed 62 selfloop flow, removed 23 redundant places. [2024-10-11 14:28:32,857 INFO L231 Difference]: Finished difference. Result has 122 places, 144 transitions, 1216 flow [2024-10-11 14:28:32,857 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=18, PETRI_DIFFERENCE_MINUEND_FLOW=833, PETRI_DIFFERENCE_MINUEND_PLACES=97, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=121, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=90, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=1216, PETRI_PLACES=122, PETRI_TRANSITIONS=144} [2024-10-11 14:28:32,858 INFO L277 CegarLoopForPetriNet]: 20 programPoint places, 102 predicate places. [2024-10-11 14:28:32,858 INFO L471 AbstractCegarLoop]: Abstraction has has 122 places, 144 transitions, 1216 flow [2024-10-11 14:28:32,858 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 4.833333333333333) internal successors, (87), 18 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) [2024-10-11 14:28:32,858 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 14:28:32,858 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 14:28:32,874 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2024-10-11 14:28:33,058 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2024-10-11 14:28:33,059 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-11 14:28:33,059 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 14:28:33,059 INFO L85 PathProgramCache]: Analyzing trace with hash 377701129, now seen corresponding path program 5 times [2024-10-11 14:28:33,059 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 14:28:33,059 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1528376245] [2024-10-11 14:28:33,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 14:28:33,060 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 14:28:33,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 14:28:33,336 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 14:28:33,336 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 14:28:33,337 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1528376245] [2024-10-11 14:28:33,337 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1528376245] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-11 14:28:33,337 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [761508162] [2024-10-11 14:28:33,337 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-10-11 14:28:33,337 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 14:28:33,337 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 14:28:33,340 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-11 14:28:33,341 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-10-11 14:28:33,387 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2024-10-11 14:28:33,387 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-11 14:28:33,388 INFO L255 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 21 conjuncts are in the unsatisfiable core [2024-10-11 14:28:33,389 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 14:28:33,480 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 14:28:33,480 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-11 14:28:34,392 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 14:28:34,392 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [761508162] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-11 14:28:34,392 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-11 14:28:34,393 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 17 [2024-10-11 14:28:34,393 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1752681983] [2024-10-11 14:28:34,393 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-11 14:28:34,393 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-10-11 14:28:34,393 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 14:28:34,393 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-10-11 14:28:34,394 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=230, Unknown=0, NotChecked=0, Total=306 [2024-10-11 14:28:34,394 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 18 [2024-10-11 14:28:34,394 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 122 places, 144 transitions, 1216 flow. Second operand has 18 states, 18 states have (on average 4.777777777777778) internal successors, (86), 18 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 14:28:34,394 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 14:28:34,394 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 18 [2024-10-11 14:28:34,394 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 14:28:34,925 INFO L124 PetriNetUnfolderBase]: 344/666 cut-off events. [2024-10-11 14:28:34,925 INFO L125 PetriNetUnfolderBase]: For 2546/2546 co-relation queries the response was YES. [2024-10-11 14:28:34,927 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3357 conditions, 666 events. 344/666 cut-off events. For 2546/2546 co-relation queries the response was YES. Maximal size of possible extension queue 77. Compared 3356 event pairs, 40 based on Foata normal form. 2/658 useless extension candidates. Maximal degree in co-relation 3254. Up to 510 conditions per place. [2024-10-11 14:28:34,930 INFO L140 encePairwiseOnDemand]: 10/18 looper letters, 127 selfloop transitions, 50 changer transitions 11/189 dead transitions. [2024-10-11 14:28:34,930 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 138 places, 189 transitions, 1902 flow [2024-10-11 14:28:34,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2024-10-11 14:28:34,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2024-10-11 14:28:34,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 136 transitions. [2024-10-11 14:28:34,931 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.41975308641975306 [2024-10-11 14:28:34,931 INFO L175 Difference]: Start difference. First operand has 122 places, 144 transitions, 1216 flow. Second operand 18 states and 136 transitions. [2024-10-11 14:28:34,931 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 138 places, 189 transitions, 1902 flow [2024-10-11 14:28:34,943 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 136 places, 189 transitions, 1804 flow, removed 47 selfloop flow, removed 2 redundant places. [2024-10-11 14:28:34,945 INFO L231 Difference]: Finished difference. Result has 142 places, 154 transitions, 1427 flow [2024-10-11 14:28:34,946 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=18, PETRI_DIFFERENCE_MINUEND_FLOW=1134, PETRI_DIFFERENCE_MINUEND_PLACES=119, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=144, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=99, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=1427, PETRI_PLACES=142, PETRI_TRANSITIONS=154} [2024-10-11 14:28:34,947 INFO L277 CegarLoopForPetriNet]: 20 programPoint places, 122 predicate places. [2024-10-11 14:28:34,947 INFO L471 AbstractCegarLoop]: Abstraction has has 142 places, 154 transitions, 1427 flow [2024-10-11 14:28:34,947 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 4.777777777777778) internal successors, (86), 18 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 14:28:34,947 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 14:28:34,948 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 14:28:34,959 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2024-10-11 14:28:35,148 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2024-10-11 14:28:35,149 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-11 14:28:35,149 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 14:28:35,149 INFO L85 PathProgramCache]: Analyzing trace with hash 1150688206, now seen corresponding path program 4 times [2024-10-11 14:28:35,149 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 14:28:35,149 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [281411174] [2024-10-11 14:28:35,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 14:28:35,149 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 14:28:35,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 14:28:35,273 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 14:28:35,273 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 14:28:35,273 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [281411174] [2024-10-11 14:28:35,273 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [281411174] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-11 14:28:35,274 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1885306385] [2024-10-11 14:28:35,274 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-10-11 14:28:35,274 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 14:28:35,274 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 14:28:35,275 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-11 14:28:35,276 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-10-11 14:28:35,317 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-10-11 14:28:35,317 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-11 14:28:35,319 INFO L255 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 15 conjuncts are in the unsatisfiable core [2024-10-11 14:28:35,320 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 14:28:35,415 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 14:28:35,415 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-11 14:28:35,533 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 14:28:35,533 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1885306385] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-11 14:28:35,534 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-11 14:28:35,534 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 6] total 15 [2024-10-11 14:28:35,534 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1249260884] [2024-10-11 14:28:35,534 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-11 14:28:35,534 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-10-11 14:28:35,534 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 14:28:35,534 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-10-11 14:28:35,535 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=169, Unknown=0, NotChecked=0, Total=240 [2024-10-11 14:28:35,535 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 18 [2024-10-11 14:28:35,535 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 142 places, 154 transitions, 1427 flow. Second operand has 16 states, 16 states have (on average 5.3125) internal successors, (85), 16 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 14:28:35,535 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 14:28:35,535 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 18 [2024-10-11 14:28:35,535 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 14:28:35,823 INFO L124 PetriNetUnfolderBase]: 344/658 cut-off events. [2024-10-11 14:28:35,823 INFO L125 PetriNetUnfolderBase]: For 3064/3064 co-relation queries the response was YES. [2024-10-11 14:28:35,826 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3506 conditions, 658 events. 344/658 cut-off events. For 3064/3064 co-relation queries the response was YES. Maximal size of possible extension queue 76. Compared 3270 event pairs, 37 based on Foata normal form. 4/654 useless extension candidates. Maximal degree in co-relation 3436. Up to 539 conditions per place. [2024-10-11 14:28:35,829 INFO L140 encePairwiseOnDemand]: 11/18 looper letters, 137 selfloop transitions, 28 changer transitions 25/191 dead transitions. [2024-10-11 14:28:35,829 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 152 places, 191 transitions, 2026 flow [2024-10-11 14:28:35,829 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-10-11 14:28:35,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-10-11 14:28:35,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 109 transitions. [2024-10-11 14:28:35,830 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4658119658119658 [2024-10-11 14:28:35,830 INFO L175 Difference]: Start difference. First operand has 142 places, 154 transitions, 1427 flow. Second operand 13 states and 109 transitions. [2024-10-11 14:28:35,830 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 152 places, 191 transitions, 2026 flow [2024-10-11 14:28:35,842 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 141 places, 191 transitions, 1887 flow, removed 49 selfloop flow, removed 11 redundant places. [2024-10-11 14:28:35,845 INFO L231 Difference]: Finished difference. Result has 144 places, 150 transitions, 1323 flow [2024-10-11 14:28:35,845 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=18, PETRI_DIFFERENCE_MINUEND_FLOW=1292, PETRI_DIFFERENCE_MINUEND_PLACES=129, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=154, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=126, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=1323, PETRI_PLACES=144, PETRI_TRANSITIONS=150} [2024-10-11 14:28:35,845 INFO L277 CegarLoopForPetriNet]: 20 programPoint places, 124 predicate places. [2024-10-11 14:28:35,845 INFO L471 AbstractCegarLoop]: Abstraction has has 144 places, 150 transitions, 1323 flow [2024-10-11 14:28:35,846 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 5.3125) internal successors, (85), 16 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 14:28:35,846 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 14:28:35,846 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 14:28:35,859 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2024-10-11 14:28:36,050 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2024-10-11 14:28:36,051 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-11 14:28:36,051 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 14:28:36,051 INFO L85 PathProgramCache]: Analyzing trace with hash 299052889, now seen corresponding path program 6 times [2024-10-11 14:28:36,051 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 14:28:36,051 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [354473150] [2024-10-11 14:28:36,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 14:28:36,051 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 14:28:36,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 14:28:36,319 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 14:28:36,319 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 14:28:36,319 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [354473150] [2024-10-11 14:28:36,319 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [354473150] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-11 14:28:36,319 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1866253837] [2024-10-11 14:28:36,320 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-10-11 14:28:36,320 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 14:28:36,320 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 14:28:36,321 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-11 14:28:36,322 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-10-11 14:28:36,358 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2024-10-11 14:28:36,358 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-11 14:28:36,358 INFO L255 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 21 conjuncts are in the unsatisfiable core [2024-10-11 14:28:36,359 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 14:28:36,469 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 14:28:36,469 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-11 14:28:37,025 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 14:28:37,025 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1866253837] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-11 14:28:37,025 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-11 14:28:37,025 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 17 [2024-10-11 14:28:37,025 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1053610446] [2024-10-11 14:28:37,025 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-11 14:28:37,025 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-10-11 14:28:37,026 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 14:28:37,026 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-10-11 14:28:37,026 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=227, Unknown=0, NotChecked=0, Total=306 [2024-10-11 14:28:37,026 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 18 [2024-10-11 14:28:37,026 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 144 places, 150 transitions, 1323 flow. Second operand has 18 states, 18 states have (on average 4.833333333333333) internal successors, (87), 18 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) [2024-10-11 14:28:37,026 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 14:28:37,026 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 18 [2024-10-11 14:28:37,026 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 14:28:37,525 INFO L124 PetriNetUnfolderBase]: 331/630 cut-off events. [2024-10-11 14:28:37,525 INFO L125 PetriNetUnfolderBase]: For 2575/2575 co-relation queries the response was YES. [2024-10-11 14:28:37,527 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3267 conditions, 630 events. 331/630 cut-off events. For 2575/2575 co-relation queries the response was YES. Maximal size of possible extension queue 71. Compared 3035 event pairs, 38 based on Foata normal form. 2/624 useless extension candidates. Maximal degree in co-relation 3221. Up to 488 conditions per place. [2024-10-11 14:28:37,529 INFO L140 encePairwiseOnDemand]: 10/18 looper letters, 127 selfloop transitions, 49 changer transitions 8/185 dead transitions. [2024-10-11 14:28:37,529 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 155 places, 185 transitions, 1846 flow [2024-10-11 14:28:37,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-10-11 14:28:37,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2024-10-11 14:28:37,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 135 transitions. [2024-10-11 14:28:37,531 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4411764705882353 [2024-10-11 14:28:37,531 INFO L175 Difference]: Start difference. First operand has 144 places, 150 transitions, 1323 flow. Second operand 17 states and 135 transitions. [2024-10-11 14:28:37,531 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 155 places, 185 transitions, 1846 flow [2024-10-11 14:28:37,540 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 142 places, 185 transitions, 1768 flow, removed 10 selfloop flow, removed 13 redundant places. [2024-10-11 14:28:37,543 INFO L231 Difference]: Finished difference. Result has 145 places, 153 transitions, 1412 flow [2024-10-11 14:28:37,543 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=18, PETRI_DIFFERENCE_MINUEND_FLOW=1245, PETRI_DIFFERENCE_MINUEND_PLACES=126, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=150, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=104, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=1412, PETRI_PLACES=145, PETRI_TRANSITIONS=153} [2024-10-11 14:28:37,544 INFO L277 CegarLoopForPetriNet]: 20 programPoint places, 125 predicate places. [2024-10-11 14:28:37,544 INFO L471 AbstractCegarLoop]: Abstraction has has 145 places, 153 transitions, 1412 flow [2024-10-11 14:28:37,545 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 4.833333333333333) internal successors, (87), 18 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) [2024-10-11 14:28:37,545 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 14:28:37,545 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 14:28:37,558 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2024-10-11 14:28:37,746 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,14 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 14:28:37,746 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-11 14:28:37,747 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 14:28:37,747 INFO L85 PathProgramCache]: Analyzing trace with hash -1434463095, now seen corresponding path program 7 times [2024-10-11 14:28:37,747 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 14:28:37,747 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [825012881] [2024-10-11 14:28:37,747 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 14:28:37,747 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 14:28:37,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 14:28:38,029 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 14:28:38,029 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 14:28:38,029 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [825012881] [2024-10-11 14:28:38,029 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [825012881] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-11 14:28:38,029 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [892134676] [2024-10-11 14:28:38,030 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-10-11 14:28:38,030 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 14:28:38,030 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 14:28:38,031 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-11 14:28:38,042 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2024-10-11 14:28:38,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 14:28:38,092 INFO L255 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 21 conjuncts are in the unsatisfiable core [2024-10-11 14:28:38,093 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 14:28:38,192 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 14:28:38,192 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-11 14:28:38,828 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 14:28:38,829 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [892134676] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-11 14:28:38,829 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-11 14:28:38,829 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 17 [2024-10-11 14:28:38,829 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2027075787] [2024-10-11 14:28:38,829 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-11 14:28:38,829 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-10-11 14:28:38,829 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 14:28:38,830 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-10-11 14:28:38,830 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=233, Unknown=0, NotChecked=0, Total=306 [2024-10-11 14:28:38,830 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 18 [2024-10-11 14:28:38,830 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 145 places, 153 transitions, 1412 flow. Second operand has 18 states, 18 states have (on average 4.777777777777778) internal successors, (86), 18 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 14:28:38,830 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 14:28:38,830 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 18 [2024-10-11 14:28:38,830 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 14:28:39,310 INFO L124 PetriNetUnfolderBase]: 378/713 cut-off events. [2024-10-11 14:28:39,310 INFO L125 PetriNetUnfolderBase]: For 3277/3277 co-relation queries the response was YES. [2024-10-11 14:28:39,313 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3954 conditions, 713 events. 378/713 cut-off events. For 3277/3277 co-relation queries the response was YES. Maximal size of possible extension queue 84. Compared 3563 event pairs, 39 based on Foata normal form. 2/705 useless extension candidates. Maximal degree in co-relation 3910. Up to 583 conditions per place. [2024-10-11 14:28:39,315 INFO L140 encePairwiseOnDemand]: 10/18 looper letters, 153 selfloop transitions, 50 changer transitions 8/212 dead transitions. [2024-10-11 14:28:39,316 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 163 places, 212 transitions, 2348 flow [2024-10-11 14:28:39,316 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2024-10-11 14:28:39,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2024-10-11 14:28:39,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 146 transitions. [2024-10-11 14:28:39,317 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.40555555555555556 [2024-10-11 14:28:39,317 INFO L175 Difference]: Start difference. First operand has 145 places, 153 transitions, 1412 flow. Second operand 20 states and 146 transitions. [2024-10-11 14:28:39,317 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 163 places, 212 transitions, 2348 flow [2024-10-11 14:28:39,329 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 149 places, 212 transitions, 2171 flow, removed 53 selfloop flow, removed 14 redundant places. [2024-10-11 14:28:39,331 INFO L231 Difference]: Finished difference. Result has 155 places, 177 transitions, 1757 flow [2024-10-11 14:28:39,332 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=18, PETRI_DIFFERENCE_MINUEND_FLOW=1251, PETRI_DIFFERENCE_MINUEND_PLACES=130, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=153, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=117, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=1757, PETRI_PLACES=155, PETRI_TRANSITIONS=177} [2024-10-11 14:28:39,332 INFO L277 CegarLoopForPetriNet]: 20 programPoint places, 135 predicate places. [2024-10-11 14:28:39,332 INFO L471 AbstractCegarLoop]: Abstraction has has 155 places, 177 transitions, 1757 flow [2024-10-11 14:28:39,332 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 4.777777777777778) internal successors, (86), 18 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 14:28:39,332 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 14:28:39,332 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 14:28:39,347 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2024-10-11 14:28:39,536 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2024-10-11 14:28:39,537 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-11 14:28:39,537 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 14:28:39,537 INFO L85 PathProgramCache]: Analyzing trace with hash -1351346205, now seen corresponding path program 8 times [2024-10-11 14:28:39,537 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 14:28:39,537 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [385658323] [2024-10-11 14:28:39,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 14:28:39,537 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 14:28:39,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 14:28:39,791 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 14:28:39,791 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 14:28:39,791 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [385658323] [2024-10-11 14:28:39,791 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [385658323] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-11 14:28:39,791 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [26732758] [2024-10-11 14:28:39,791 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-11 14:28:39,791 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 14:28:39,791 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 14:28:39,792 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-11 14:28:39,793 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2024-10-11 14:28:39,829 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-11 14:28:39,829 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-11 14:28:39,831 INFO L255 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 21 conjuncts are in the unsatisfiable core [2024-10-11 14:28:39,832 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 14:28:39,921 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 14:28:39,921 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-11 14:28:40,573 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 14:28:40,573 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [26732758] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-11 14:28:40,573 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-11 14:28:40,573 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 17 [2024-10-11 14:28:40,573 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1112732556] [2024-10-11 14:28:40,574 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-11 14:28:40,574 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-10-11 14:28:40,574 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 14:28:40,574 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-10-11 14:28:40,574 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=229, Unknown=0, NotChecked=0, Total=306 [2024-10-11 14:28:40,574 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 18 [2024-10-11 14:28:40,575 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 155 places, 177 transitions, 1757 flow. Second operand has 18 states, 18 states have (on average 4.777777777777778) internal successors, (86), 18 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 14:28:40,575 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 14:28:40,575 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 18 [2024-10-11 14:28:40,575 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 14:28:41,139 INFO L124 PetriNetUnfolderBase]: 378/717 cut-off events. [2024-10-11 14:28:41,139 INFO L125 PetriNetUnfolderBase]: For 3939/3939 co-relation queries the response was YES. [2024-10-11 14:28:41,142 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4099 conditions, 717 events. 378/717 cut-off events. For 3939/3939 co-relation queries the response was YES. Maximal size of possible extension queue 84. Compared 3609 event pairs, 38 based on Foata normal form. 2/709 useless extension candidates. Maximal degree in co-relation 4051. Up to 585 conditions per place. [2024-10-11 14:28:41,145 INFO L140 encePairwiseOnDemand]: 10/18 looper letters, 159 selfloop transitions, 53 changer transitions 7/220 dead transitions. [2024-10-11 14:28:41,145 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 175 places, 220 transitions, 2464 flow [2024-10-11 14:28:41,145 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2024-10-11 14:28:41,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2024-10-11 14:28:41,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 167 transitions. [2024-10-11 14:28:41,146 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4033816425120773 [2024-10-11 14:28:41,146 INFO L175 Difference]: Start difference. First operand has 155 places, 177 transitions, 1757 flow. Second operand 23 states and 167 transitions. [2024-10-11 14:28:41,146 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 175 places, 220 transitions, 2464 flow [2024-10-11 14:28:41,160 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 165 places, 220 transitions, 2256 flow, removed 85 selfloop flow, removed 10 redundant places. [2024-10-11 14:28:41,162 INFO L231 Difference]: Finished difference. Result has 168 places, 182 transitions, 1793 flow [2024-10-11 14:28:41,163 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=18, PETRI_DIFFERENCE_MINUEND_FLOW=1585, PETRI_DIFFERENCE_MINUEND_PLACES=143, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=177, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=49, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=128, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=1793, PETRI_PLACES=168, PETRI_TRANSITIONS=182} [2024-10-11 14:28:41,163 INFO L277 CegarLoopForPetriNet]: 20 programPoint places, 148 predicate places. [2024-10-11 14:28:41,163 INFO L471 AbstractCegarLoop]: Abstraction has has 168 places, 182 transitions, 1793 flow [2024-10-11 14:28:41,163 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 4.777777777777778) internal successors, (86), 18 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 14:28:41,163 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 14:28:41,163 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 14:28:41,177 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2024-10-11 14:28:41,364 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2024-10-11 14:28:41,364 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-11 14:28:41,364 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 14:28:41,364 INFO L85 PathProgramCache]: Analyzing trace with hash 2084151915, now seen corresponding path program 9 times [2024-10-11 14:28:41,364 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 14:28:41,364 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [201524907] [2024-10-11 14:28:41,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 14:28:41,365 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 14:28:41,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 14:28:41,600 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 14:28:41,600 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 14:28:41,600 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [201524907] [2024-10-11 14:28:41,600 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [201524907] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-11 14:28:41,600 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1371876035] [2024-10-11 14:28:41,601 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-10-11 14:28:41,601 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 14:28:41,601 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 14:28:41,602 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-11 14:28:41,604 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2024-10-11 14:28:41,641 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-10-11 14:28:41,641 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-11 14:28:41,644 INFO L255 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 21 conjuncts are in the unsatisfiable core [2024-10-11 14:28:41,645 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 14:28:41,738 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 14:28:41,739 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-11 14:28:42,335 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 14:28:42,335 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1371876035] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-11 14:28:42,335 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-11 14:28:42,335 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 17 [2024-10-11 14:28:42,335 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [218944663] [2024-10-11 14:28:42,335 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-11 14:28:42,336 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-10-11 14:28:42,336 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 14:28:42,336 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-10-11 14:28:42,336 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=236, Unknown=0, NotChecked=0, Total=306 [2024-10-11 14:28:42,336 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 18 [2024-10-11 14:28:42,336 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 168 places, 182 transitions, 1793 flow. Second operand has 18 states, 18 states have (on average 4.777777777777778) internal successors, (86), 18 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 14:28:42,336 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 14:28:42,336 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 18 [2024-10-11 14:28:42,337 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 14:28:42,701 INFO L124 PetriNetUnfolderBase]: 382/734 cut-off events. [2024-10-11 14:28:42,702 INFO L125 PetriNetUnfolderBase]: For 3787/3787 co-relation queries the response was YES. [2024-10-11 14:28:42,704 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4149 conditions, 734 events. 382/734 cut-off events. For 3787/3787 co-relation queries the response was YES. Maximal size of possible extension queue 86. Compared 3759 event pairs, 40 based on Foata normal form. 3/725 useless extension candidates. Maximal degree in co-relation 4099. Up to 638 conditions per place. [2024-10-11 14:28:42,706 INFO L140 encePairwiseOnDemand]: 10/18 looper letters, 168 selfloop transitions, 40 changer transitions 7/216 dead transitions. [2024-10-11 14:28:42,707 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 184 places, 216 transitions, 2420 flow [2024-10-11 14:28:42,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2024-10-11 14:28:42,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2024-10-11 14:28:42,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 131 transitions. [2024-10-11 14:28:42,708 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.404320987654321 [2024-10-11 14:28:42,708 INFO L175 Difference]: Start difference. First operand has 168 places, 182 transitions, 1793 flow. Second operand 18 states and 131 transitions. [2024-10-11 14:28:42,708 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 184 places, 216 transitions, 2420 flow [2024-10-11 14:28:42,740 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 165 places, 216 transitions, 2246 flow, removed 49 selfloop flow, removed 19 redundant places. [2024-10-11 14:28:42,742 INFO L231 Difference]: Finished difference. Result has 171 places, 187 transitions, 1818 flow [2024-10-11 14:28:42,743 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=18, PETRI_DIFFERENCE_MINUEND_FLOW=1619, PETRI_DIFFERENCE_MINUEND_PLACES=148, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=182, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=143, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=1818, PETRI_PLACES=171, PETRI_TRANSITIONS=187} [2024-10-11 14:28:42,743 INFO L277 CegarLoopForPetriNet]: 20 programPoint places, 151 predicate places. [2024-10-11 14:28:42,743 INFO L471 AbstractCegarLoop]: Abstraction has has 171 places, 187 transitions, 1818 flow [2024-10-11 14:28:42,743 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 4.777777777777778) internal successors, (86), 18 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 14:28:42,743 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 14:28:42,744 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 14:28:42,758 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2024-10-11 14:28:42,947 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2024-10-11 14:28:42,947 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-11 14:28:42,948 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 14:28:42,948 INFO L85 PathProgramCache]: Analyzing trace with hash -714606813, now seen corresponding path program 10 times [2024-10-11 14:28:42,948 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 14:28:42,948 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [850682919] [2024-10-11 14:28:42,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 14:28:42,948 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 14:28:42,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 14:28:43,156 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 14:28:43,157 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 14:28:43,157 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [850682919] [2024-10-11 14:28:43,157 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [850682919] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-11 14:28:43,157 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2051010571] [2024-10-11 14:28:43,157 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-10-11 14:28:43,157 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 14:28:43,157 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 14:28:43,158 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-11 14:28:43,159 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2024-10-11 14:28:43,199 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-10-11 14:28:43,199 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-11 14:28:43,203 INFO L255 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 21 conjuncts are in the unsatisfiable core [2024-10-11 14:28:43,204 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 14:28:43,299 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 14:28:43,299 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-11 14:28:43,956 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 14:28:43,956 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2051010571] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-11 14:28:43,956 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-11 14:28:43,956 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 17 [2024-10-11 14:28:43,956 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [807386052] [2024-10-11 14:28:43,956 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-11 14:28:43,957 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-10-11 14:28:43,957 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 14:28:43,957 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-10-11 14:28:43,957 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=236, Unknown=0, NotChecked=0, Total=306 [2024-10-11 14:28:43,957 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 18 [2024-10-11 14:28:43,957 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 171 places, 187 transitions, 1818 flow. Second operand has 18 states, 18 states have (on average 4.833333333333333) internal successors, (87), 18 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) [2024-10-11 14:28:43,957 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 14:28:43,958 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 18 [2024-10-11 14:28:43,958 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 14:28:44,443 INFO L124 PetriNetUnfolderBase]: 402/763 cut-off events. [2024-10-11 14:28:44,444 INFO L125 PetriNetUnfolderBase]: For 3868/3868 co-relation queries the response was YES. [2024-10-11 14:28:44,446 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4369 conditions, 763 events. 402/763 cut-off events. For 3868/3868 co-relation queries the response was YES. Maximal size of possible extension queue 90. Compared 3890 event pairs, 35 based on Foata normal form. 2/751 useless extension candidates. Maximal degree in co-relation 4316. Up to 655 conditions per place. [2024-10-11 14:28:44,449 INFO L140 encePairwiseOnDemand]: 9/18 looper letters, 181 selfloop transitions, 41 changer transitions 9/232 dead transitions. [2024-10-11 14:28:44,449 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 186 places, 232 transitions, 2609 flow [2024-10-11 14:28:44,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-10-11 14:28:44,449 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2024-10-11 14:28:44,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 131 transitions. [2024-10-11 14:28:44,450 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.42810457516339867 [2024-10-11 14:28:44,450 INFO L175 Difference]: Start difference. First operand has 171 places, 187 transitions, 1818 flow. Second operand 17 states and 131 transitions. [2024-10-11 14:28:44,450 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 186 places, 232 transitions, 2609 flow [2024-10-11 14:28:44,462 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 174 places, 232 transitions, 2504 flow, removed 28 selfloop flow, removed 12 redundant places. [2024-10-11 14:28:44,465 INFO L231 Difference]: Finished difference. Result has 180 places, 200 transitions, 2038 flow [2024-10-11 14:28:44,465 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=18, PETRI_DIFFERENCE_MINUEND_FLOW=1716, PETRI_DIFFERENCE_MINUEND_PLACES=158, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=187, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=152, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=2038, PETRI_PLACES=180, PETRI_TRANSITIONS=200} [2024-10-11 14:28:44,465 INFO L277 CegarLoopForPetriNet]: 20 programPoint places, 160 predicate places. [2024-10-11 14:28:44,465 INFO L471 AbstractCegarLoop]: Abstraction has has 180 places, 200 transitions, 2038 flow [2024-10-11 14:28:44,465 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 4.833333333333333) internal successors, (87), 18 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) [2024-10-11 14:28:44,466 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 14:28:44,466 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 14:28:44,477 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2024-10-11 14:28:44,668 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2024-10-11 14:28:44,668 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-11 14:28:44,669 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 14:28:44,669 INFO L85 PathProgramCache]: Analyzing trace with hash 915556707, now seen corresponding path program 11 times [2024-10-11 14:28:44,669 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 14:28:44,669 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1116554812] [2024-10-11 14:28:44,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 14:28:44,669 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 14:28:44,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 14:28:44,967 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 14:28:44,968 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 14:28:44,968 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1116554812] [2024-10-11 14:28:44,968 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1116554812] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-11 14:28:44,968 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [159197905] [2024-10-11 14:28:44,968 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-10-11 14:28:44,968 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 14:28:44,968 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 14:28:44,969 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-11 14:28:44,970 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2024-10-11 14:28:45,011 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2024-10-11 14:28:45,011 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-11 14:28:45,012 INFO L255 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 21 conjuncts are in the unsatisfiable core [2024-10-11 14:28:45,012 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 14:28:45,104 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 14:28:45,104 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-11 14:28:46,038 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 14:28:46,038 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [159197905] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-11 14:28:46,038 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-11 14:28:46,038 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 17 [2024-10-11 14:28:46,039 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1576933487] [2024-10-11 14:28:46,039 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-11 14:28:46,039 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-10-11 14:28:46,040 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 14:28:46,040 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-10-11 14:28:46,040 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=233, Unknown=0, NotChecked=0, Total=306 [2024-10-11 14:28:46,040 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 18 [2024-10-11 14:28:46,041 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 180 places, 200 transitions, 2038 flow. Second operand has 18 states, 18 states have (on average 4.777777777777778) internal successors, (86), 18 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 14:28:46,041 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 14:28:46,041 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 18 [2024-10-11 14:28:46,041 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 14:28:46,555 INFO L124 PetriNetUnfolderBase]: 424/808 cut-off events. [2024-10-11 14:28:46,556 INFO L125 PetriNetUnfolderBase]: For 5780/5780 co-relation queries the response was YES. [2024-10-11 14:28:46,559 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4931 conditions, 808 events. 424/808 cut-off events. For 5780/5780 co-relation queries the response was YES. Maximal size of possible extension queue 95. Compared 4198 event pairs, 40 based on Foata normal form. 2/796 useless extension candidates. Maximal degree in co-relation 4873. Up to 652 conditions per place. [2024-10-11 14:28:46,563 INFO L140 encePairwiseOnDemand]: 9/18 looper letters, 179 selfloop transitions, 56 changer transitions 9/245 dead transitions. [2024-10-11 14:28:46,563 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 199 places, 245 transitions, 2941 flow [2024-10-11 14:28:46,563 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2024-10-11 14:28:46,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2024-10-11 14:28:46,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 151 transitions. [2024-10-11 14:28:46,564 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.3994708994708995 [2024-10-11 14:28:46,564 INFO L175 Difference]: Start difference. First operand has 180 places, 200 transitions, 2038 flow. Second operand 21 states and 151 transitions. [2024-10-11 14:28:46,564 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 199 places, 245 transitions, 2941 flow [2024-10-11 14:28:46,599 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 187 places, 245 transitions, 2763 flow, removed 65 selfloop flow, removed 12 redundant places. [2024-10-11 14:28:46,602 INFO L231 Difference]: Finished difference. Result has 192 places, 210 transitions, 2254 flow [2024-10-11 14:28:46,602 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=18, PETRI_DIFFERENCE_MINUEND_FLOW=1876, PETRI_DIFFERENCE_MINUEND_PLACES=167, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=200, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=49, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=149, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=2254, PETRI_PLACES=192, PETRI_TRANSITIONS=210} [2024-10-11 14:28:46,603 INFO L277 CegarLoopForPetriNet]: 20 programPoint places, 172 predicate places. [2024-10-11 14:28:46,603 INFO L471 AbstractCegarLoop]: Abstraction has has 192 places, 210 transitions, 2254 flow [2024-10-11 14:28:46,603 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 4.777777777777778) internal successors, (86), 18 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 14:28:46,603 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 14:28:46,603 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 14:28:46,615 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2024-10-11 14:28:46,803 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,19 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 14:28:46,804 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-11 14:28:46,804 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 14:28:46,805 INFO L85 PathProgramCache]: Analyzing trace with hash 1287416163, now seen corresponding path program 12 times [2024-10-11 14:28:46,805 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 14:28:46,805 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [349427643] [2024-10-11 14:28:46,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 14:28:46,805 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 14:28:46,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 14:28:47,052 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 14:28:47,052 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 14:28:47,052 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [349427643] [2024-10-11 14:28:47,052 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [349427643] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-11 14:28:47,052 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [806914704] [2024-10-11 14:28:47,052 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-10-11 14:28:47,053 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 14:28:47,053 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 14:28:47,054 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-11 14:28:47,056 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2024-10-11 14:28:47,093 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2024-10-11 14:28:47,093 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-11 14:28:47,094 INFO L255 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 21 conjuncts are in the unsatisfiable core [2024-10-11 14:28:47,095 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 14:28:47,232 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 14:28:47,232 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-11 14:28:47,484 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 14:28:47,484 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [806914704] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-11 14:28:47,484 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-11 14:28:47,484 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 17 [2024-10-11 14:28:47,484 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [35801757] [2024-10-11 14:28:47,484 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-11 14:28:47,485 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-10-11 14:28:47,485 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 14:28:47,485 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-10-11 14:28:47,485 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=240, Unknown=0, NotChecked=0, Total=306 [2024-10-11 14:28:47,485 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 18 [2024-10-11 14:28:47,485 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 192 places, 210 transitions, 2254 flow. Second operand has 18 states, 18 states have (on average 4.833333333333333) internal successors, (87), 18 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) [2024-10-11 14:28:47,485 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 14:28:47,485 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 18 [2024-10-11 14:28:47,485 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 14:28:51,751 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-10-11 14:28:55,947 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-10-11 14:28:56,433 INFO L124 PetriNetUnfolderBase]: 474/905 cut-off events. [2024-10-11 14:28:56,433 INFO L125 PetriNetUnfolderBase]: For 7827/7827 co-relation queries the response was YES. [2024-10-11 14:28:56,437 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5617 conditions, 905 events. 474/905 cut-off events. For 7827/7827 co-relation queries the response was YES. Maximal size of possible extension queue 110. Compared 4890 event pairs, 37 based on Foata normal form. 3/896 useless extension candidates. Maximal degree in co-relation 5559. Up to 682 conditions per place. [2024-10-11 14:28:56,440 INFO L140 encePairwiseOnDemand]: 10/18 looper letters, 194 selfloop transitions, 70 changer transitions 27/292 dead transitions. [2024-10-11 14:28:56,440 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 213 places, 292 transitions, 3520 flow [2024-10-11 14:28:56,441 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2024-10-11 14:28:56,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2024-10-11 14:28:56,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 183 transitions. [2024-10-11 14:28:56,442 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4236111111111111 [2024-10-11 14:28:56,442 INFO L175 Difference]: Start difference. First operand has 192 places, 210 transitions, 2254 flow. Second operand 24 states and 183 transitions. [2024-10-11 14:28:56,443 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 213 places, 292 transitions, 3520 flow [2024-10-11 14:28:56,467 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 196 places, 292 transitions, 3282 flow, removed 87 selfloop flow, removed 17 redundant places. [2024-10-11 14:28:56,470 INFO L231 Difference]: Finished difference. Result has 206 places, 235 transitions, 2559 flow [2024-10-11 14:28:56,470 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=18, PETRI_DIFFERENCE_MINUEND_FLOW=2022, PETRI_DIFFERENCE_MINUEND_PLACES=173, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=210, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=52, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=156, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=2559, PETRI_PLACES=206, PETRI_TRANSITIONS=235} [2024-10-11 14:28:56,471 INFO L277 CegarLoopForPetriNet]: 20 programPoint places, 186 predicate places. [2024-10-11 14:28:56,471 INFO L471 AbstractCegarLoop]: Abstraction has has 206 places, 235 transitions, 2559 flow [2024-10-11 14:28:56,471 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 4.833333333333333) internal successors, (87), 18 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) [2024-10-11 14:28:56,471 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 14:28:56,471 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 14:28:56,483 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2024-10-11 14:28:56,672 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,20 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 14:28:56,673 INFO L396 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-11 14:28:56,673 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 14:28:56,673 INFO L85 PathProgramCache]: Analyzing trace with hash -892138867, now seen corresponding path program 13 times [2024-10-11 14:28:56,673 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 14:28:56,673 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1499083648] [2024-10-11 14:28:56,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 14:28:56,673 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 14:28:56,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 14:28:56,922 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 14:28:56,922 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 14:28:56,923 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1499083648] [2024-10-11 14:28:56,923 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1499083648] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-11 14:28:56,923 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1479516989] [2024-10-11 14:28:56,923 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-10-11 14:28:56,923 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 14:28:56,923 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 14:28:56,924 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-11 14:28:56,925 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2024-10-11 14:28:56,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 14:28:56,973 INFO L255 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 21 conjuncts are in the unsatisfiable core [2024-10-11 14:28:56,973 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 14:28:57,094 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 14:28:57,094 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-11 14:28:57,843 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 14:28:57,843 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1479516989] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-11 14:28:57,843 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-11 14:28:57,843 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 17 [2024-10-11 14:28:57,843 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [364888480] [2024-10-11 14:28:57,844 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-11 14:28:57,844 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-10-11 14:28:57,844 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 14:28:57,844 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-10-11 14:28:57,844 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=230, Unknown=0, NotChecked=0, Total=306 [2024-10-11 14:28:57,844 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 18 [2024-10-11 14:28:57,844 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 206 places, 235 transitions, 2559 flow. Second operand has 18 states, 18 states have (on average 4.833333333333333) internal successors, (87), 18 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) [2024-10-11 14:28:57,845 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 14:28:57,845 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 18 [2024-10-11 14:28:57,845 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 14:28:58,313 INFO L124 PetriNetUnfolderBase]: 489/926 cut-off events. [2024-10-11 14:28:58,313 INFO L125 PetriNetUnfolderBase]: For 9984/9984 co-relation queries the response was YES. [2024-10-11 14:28:58,319 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6134 conditions, 926 events. 489/926 cut-off events. For 9984/9984 co-relation queries the response was YES. Maximal size of possible extension queue 118. Compared 4979 event pairs, 43 based on Foata normal form. 2/914 useless extension candidates. Maximal degree in co-relation 6069. Up to 783 conditions per place. [2024-10-11 14:28:58,325 INFO L140 encePairwiseOnDemand]: 10/18 looper letters, 214 selfloop transitions, 54 changer transitions 8/277 dead transitions. [2024-10-11 14:28:58,326 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 218 places, 277 transitions, 3647 flow [2024-10-11 14:28:58,327 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-10-11 14:28:58,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2024-10-11 14:28:58,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 126 transitions. [2024-10-11 14:28:58,329 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4117647058823529 [2024-10-11 14:28:58,329 INFO L175 Difference]: Start difference. First operand has 206 places, 235 transitions, 2559 flow. Second operand 17 states and 126 transitions. [2024-10-11 14:28:58,329 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 218 places, 277 transitions, 3647 flow [2024-10-11 14:28:58,361 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 207 places, 277 transitions, 3344 flow, removed 130 selfloop flow, removed 11 redundant places. [2024-10-11 14:28:58,365 INFO L231 Difference]: Finished difference. Result has 212 places, 248 transitions, 2769 flow [2024-10-11 14:28:58,365 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=18, PETRI_DIFFERENCE_MINUEND_FLOW=2266, PETRI_DIFFERENCE_MINUEND_PLACES=191, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=235, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=189, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=2769, PETRI_PLACES=212, PETRI_TRANSITIONS=248} [2024-10-11 14:28:58,365 INFO L277 CegarLoopForPetriNet]: 20 programPoint places, 192 predicate places. [2024-10-11 14:28:58,366 INFO L471 AbstractCegarLoop]: Abstraction has has 212 places, 248 transitions, 2769 flow [2024-10-11 14:28:58,366 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 4.833333333333333) internal successors, (87), 18 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) [2024-10-11 14:28:58,366 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 14:28:58,366 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 14:28:58,378 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2024-10-11 14:28:58,570 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,21 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 14:28:58,571 INFO L396 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-11 14:28:58,571 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 14:28:58,571 INFO L85 PathProgramCache]: Analyzing trace with hash 836908467, now seen corresponding path program 14 times [2024-10-11 14:28:58,571 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 14:28:58,571 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1207172143] [2024-10-11 14:28:58,571 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 14:28:58,571 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 14:28:58,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 14:28:58,848 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 14:28:58,848 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 14:28:58,848 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1207172143] [2024-10-11 14:28:58,848 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1207172143] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-11 14:28:58,848 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1252660278] [2024-10-11 14:28:58,848 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-11 14:28:58,849 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 14:28:58,849 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 14:28:58,850 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-11 14:28:58,851 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2024-10-11 14:28:58,885 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-11 14:28:58,885 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-11 14:28:58,886 INFO L255 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 21 conjuncts are in the unsatisfiable core [2024-10-11 14:28:58,886 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 14:28:59,002 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 14:28:59,002 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-11 14:28:59,706 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 14:28:59,707 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1252660278] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-11 14:28:59,707 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-11 14:28:59,707 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 17 [2024-10-11 14:28:59,707 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1797893931] [2024-10-11 14:28:59,707 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-11 14:28:59,707 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-10-11 14:28:59,707 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 14:28:59,707 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-10-11 14:28:59,708 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=229, Unknown=0, NotChecked=0, Total=306 [2024-10-11 14:28:59,708 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 18 [2024-10-11 14:28:59,708 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 212 places, 248 transitions, 2769 flow. Second operand has 18 states, 18 states have (on average 4.833333333333333) internal successors, (87), 18 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) [2024-10-11 14:28:59,708 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 14:28:59,708 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 18 [2024-10-11 14:28:59,708 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 14:29:00,307 INFO L124 PetriNetUnfolderBase]: 488/928 cut-off events. [2024-10-11 14:29:00,307 INFO L125 PetriNetUnfolderBase]: For 9242/9242 co-relation queries the response was YES. [2024-10-11 14:29:00,311 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6033 conditions, 928 events. 488/928 cut-off events. For 9242/9242 co-relation queries the response was YES. Maximal size of possible extension queue 118. Compared 5026 event pairs, 39 based on Foata normal form. 2/914 useless extension candidates. Maximal degree in co-relation 5967. Up to 774 conditions per place. [2024-10-11 14:29:00,314 INFO L140 encePairwiseOnDemand]: 9/18 looper letters, 222 selfloop transitions, 57 changer transitions 8/288 dead transitions. [2024-10-11 14:29:00,314 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 231 places, 288 transitions, 3568 flow [2024-10-11 14:29:00,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2024-10-11 14:29:00,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2024-10-11 14:29:00,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 164 transitions. [2024-10-11 14:29:00,315 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.41414141414141414 [2024-10-11 14:29:00,315 INFO L175 Difference]: Start difference. First operand has 212 places, 248 transitions, 2769 flow. Second operand 22 states and 164 transitions. [2024-10-11 14:29:00,315 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 231 places, 288 transitions, 3568 flow [2024-10-11 14:29:00,351 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 221 places, 288 transitions, 3280 flow, removed 119 selfloop flow, removed 10 redundant places. [2024-10-11 14:29:00,354 INFO L231 Difference]: Finished difference. Result has 224 places, 251 transitions, 2714 flow [2024-10-11 14:29:00,354 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=18, PETRI_DIFFERENCE_MINUEND_FLOW=2481, PETRI_DIFFERENCE_MINUEND_PLACES=200, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=248, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=54, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=194, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=2714, PETRI_PLACES=224, PETRI_TRANSITIONS=251} [2024-10-11 14:29:00,355 INFO L277 CegarLoopForPetriNet]: 20 programPoint places, 204 predicate places. [2024-10-11 14:29:00,355 INFO L471 AbstractCegarLoop]: Abstraction has has 224 places, 251 transitions, 2714 flow [2024-10-11 14:29:00,355 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 4.833333333333333) internal successors, (87), 18 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) [2024-10-11 14:29:00,355 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 14:29:00,355 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 14:29:00,366 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2024-10-11 14:29:00,555 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2024-10-11 14:29:00,555 INFO L396 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-11 14:29:00,566 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 14:29:00,566 INFO L85 PathProgramCache]: Analyzing trace with hash 2086671125, now seen corresponding path program 15 times [2024-10-11 14:29:00,566 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 14:29:00,566 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1035332165] [2024-10-11 14:29:00,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 14:29:00,566 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 14:29:00,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 14:29:00,861 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 14:29:00,861 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 14:29:00,861 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1035332165] [2024-10-11 14:29:00,861 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1035332165] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-11 14:29:00,861 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1220619489] [2024-10-11 14:29:00,861 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-10-11 14:29:00,861 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 14:29:00,861 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 14:29:00,863 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-11 14:29:00,864 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2024-10-11 14:29:00,909 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-10-11 14:29:00,910 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-11 14:29:00,910 INFO L255 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 21 conjuncts are in the unsatisfiable core [2024-10-11 14:29:00,911 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 14:29:01,072 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 14:29:01,072 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-11 14:29:01,384 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 14:29:01,384 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1220619489] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-11 14:29:01,384 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-11 14:29:01,384 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 18 [2024-10-11 14:29:01,384 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1569293275] [2024-10-11 14:29:01,384 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-11 14:29:01,384 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-10-11 14:29:01,385 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 14:29:01,386 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-10-11 14:29:01,386 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=266, Unknown=0, NotChecked=0, Total=342 [2024-10-11 14:29:01,386 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 18 [2024-10-11 14:29:01,386 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 224 places, 251 transitions, 2714 flow. Second operand has 19 states, 19 states have (on average 4.7894736842105265) internal successors, (91), 19 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 14:29:01,386 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 14:29:01,386 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 18 [2024-10-11 14:29:01,386 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 14:29:02,220 INFO L124 PetriNetUnfolderBase]: 529/1006 cut-off events. [2024-10-11 14:29:02,221 INFO L125 PetriNetUnfolderBase]: For 13642/13642 co-relation queries the response was YES. [2024-10-11 14:29:02,225 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6897 conditions, 1006 events. 529/1006 cut-off events. For 13642/13642 co-relation queries the response was YES. Maximal size of possible extension queue 126. Compared 5547 event pairs, 40 based on Foata normal form. 3/991 useless extension candidates. Maximal degree in co-relation 6830. Up to 736 conditions per place. [2024-10-11 14:29:02,229 INFO L140 encePairwiseOnDemand]: 10/18 looper letters, 208 selfloop transitions, 96 changer transitions 13/318 dead transitions. [2024-10-11 14:29:02,229 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 246 places, 318 transitions, 4216 flow [2024-10-11 14:29:02,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2024-10-11 14:29:02,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2024-10-11 14:29:02,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 187 transitions. [2024-10-11 14:29:02,230 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.43287037037037035 [2024-10-11 14:29:02,230 INFO L175 Difference]: Start difference. First operand has 224 places, 251 transitions, 2714 flow. Second operand 24 states and 187 transitions. [2024-10-11 14:29:02,230 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 246 places, 318 transitions, 4216 flow [2024-10-11 14:29:02,266 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 227 places, 318 transitions, 3973 flow, removed 85 selfloop flow, removed 19 redundant places. [2024-10-11 14:29:02,270 INFO L231 Difference]: Finished difference. Result has 233 places, 271 transitions, 3293 flow [2024-10-11 14:29:02,270 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=18, PETRI_DIFFERENCE_MINUEND_FLOW=2479, PETRI_DIFFERENCE_MINUEND_PLACES=204, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=251, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=80, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=168, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=3293, PETRI_PLACES=233, PETRI_TRANSITIONS=271} [2024-10-11 14:29:02,270 INFO L277 CegarLoopForPetriNet]: 20 programPoint places, 213 predicate places. [2024-10-11 14:29:02,270 INFO L471 AbstractCegarLoop]: Abstraction has has 233 places, 271 transitions, 3293 flow [2024-10-11 14:29:02,271 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 4.7894736842105265) internal successors, (91), 19 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 14:29:02,271 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 14:29:02,271 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 14:29:02,282 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2024-10-11 14:29:02,471 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,23 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 14:29:02,471 INFO L396 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-11 14:29:02,472 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 14:29:02,472 INFO L85 PathProgramCache]: Analyzing trace with hash -2129647931, now seen corresponding path program 16 times [2024-10-11 14:29:02,472 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 14:29:02,472 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2138746516] [2024-10-11 14:29:02,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 14:29:02,472 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 14:29:02,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 14:29:02,767 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 14:29:02,767 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 14:29:02,767 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2138746516] [2024-10-11 14:29:02,767 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2138746516] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-11 14:29:02,767 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [177325310] [2024-10-11 14:29:02,767 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-10-11 14:29:02,767 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 14:29:02,768 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 14:29:02,769 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-11 14:29:02,770 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2024-10-11 14:29:02,821 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-10-11 14:29:02,821 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-11 14:29:02,825 INFO L255 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 21 conjuncts are in the unsatisfiable core [2024-10-11 14:29:02,826 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 14:29:02,959 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 14:29:02,959 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-11 14:29:03,218 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 14:29:03,218 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [177325310] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-11 14:29:03,218 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-11 14:29:03,218 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 18 [2024-10-11 14:29:03,218 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1066738942] [2024-10-11 14:29:03,218 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-11 14:29:03,218 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-10-11 14:29:03,218 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 14:29:03,219 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-10-11 14:29:03,219 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=263, Unknown=0, NotChecked=0, Total=342 [2024-10-11 14:29:03,219 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 18 [2024-10-11 14:29:03,219 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 233 places, 271 transitions, 3293 flow. Second operand has 19 states, 19 states have (on average 4.7368421052631575) internal successors, (90), 19 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 14:29:03,219 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 14:29:03,219 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 18 [2024-10-11 14:29:03,219 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 14:29:04,197 INFO L124 PetriNetUnfolderBase]: 528/1013 cut-off events. [2024-10-11 14:29:04,198 INFO L125 PetriNetUnfolderBase]: For 14478/14478 co-relation queries the response was YES. [2024-10-11 14:29:04,201 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7155 conditions, 1013 events. 528/1013 cut-off events. For 14478/14478 co-relation queries the response was YES. Maximal size of possible extension queue 126. Compared 5629 event pairs, 39 based on Foata normal form. 3/998 useless extension candidates. Maximal degree in co-relation 7084. Up to 740 conditions per place. [2024-10-11 14:29:04,205 INFO L140 encePairwiseOnDemand]: 10/18 looper letters, 214 selfloop transitions, 101 changer transitions 12/328 dead transitions. [2024-10-11 14:29:04,205 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 255 places, 328 transitions, 4569 flow [2024-10-11 14:29:04,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2024-10-11 14:29:04,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2024-10-11 14:29:04,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 202 transitions. [2024-10-11 14:29:04,206 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.43162393162393164 [2024-10-11 14:29:04,206 INFO L175 Difference]: Start difference. First operand has 233 places, 271 transitions, 3293 flow. Second operand 26 states and 202 transitions. [2024-10-11 14:29:04,206 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 255 places, 328 transitions, 4569 flow [2024-10-11 14:29:04,250 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 246 places, 328 transitions, 3820 flow, removed 345 selfloop flow, removed 9 redundant places. [2024-10-11 14:29:04,254 INFO L231 Difference]: Finished difference. Result has 249 places, 278 transitions, 3209 flow [2024-10-11 14:29:04,254 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=18, PETRI_DIFFERENCE_MINUEND_FLOW=2811, PETRI_DIFFERENCE_MINUEND_PLACES=221, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=270, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=94, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=176, PETRI_DIFFERENCE_SUBTRAHEND_STATES=26, PETRI_FLOW=3209, PETRI_PLACES=249, PETRI_TRANSITIONS=278} [2024-10-11 14:29:04,254 INFO L277 CegarLoopForPetriNet]: 20 programPoint places, 229 predicate places. [2024-10-11 14:29:04,254 INFO L471 AbstractCegarLoop]: Abstraction has has 249 places, 278 transitions, 3209 flow [2024-10-11 14:29:04,254 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 4.7368421052631575) internal successors, (90), 19 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 14:29:04,254 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 14:29:04,255 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 14:29:04,267 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2024-10-11 14:29:04,455 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,24 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 14:29:04,455 INFO L396 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-11 14:29:04,455 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 14:29:04,455 INFO L85 PathProgramCache]: Analyzing trace with hash -1672959803, now seen corresponding path program 17 times [2024-10-11 14:29:04,455 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 14:29:04,456 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1819616033] [2024-10-11 14:29:04,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 14:29:04,456 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 14:29:04,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 14:29:04,673 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 14:29:04,674 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 14:29:04,674 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1819616033] [2024-10-11 14:29:04,674 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1819616033] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-11 14:29:04,674 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1380029470] [2024-10-11 14:29:04,674 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-10-11 14:29:04,674 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 14:29:04,674 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 14:29:04,675 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-11 14:29:04,676 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2024-10-11 14:29:04,717 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-11 14:29:04,717 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-11 14:29:04,718 INFO L255 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 21 conjuncts are in the unsatisfiable core [2024-10-11 14:29:04,718 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 14:29:04,823 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 14:29:04,823 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-11 14:29:05,521 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 14:29:05,521 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1380029470] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-11 14:29:05,522 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-11 14:29:05,522 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 17 [2024-10-11 14:29:05,522 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1493013157] [2024-10-11 14:29:05,522 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-11 14:29:05,522 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-10-11 14:29:05,522 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 14:29:05,522 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-10-11 14:29:05,523 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=235, Unknown=0, NotChecked=0, Total=306 [2024-10-11 14:29:05,523 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 18 [2024-10-11 14:29:05,523 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 249 places, 278 transitions, 3209 flow. Second operand has 18 states, 18 states have (on average 4.777777777777778) internal successors, (86), 18 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 14:29:05,523 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 14:29:05,523 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 18 [2024-10-11 14:29:05,523 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 14:29:05,989 INFO L124 PetriNetUnfolderBase]: 532/1025 cut-off events. [2024-10-11 14:29:05,989 INFO L125 PetriNetUnfolderBase]: For 10404/10404 co-relation queries the response was YES. [2024-10-11 14:29:05,994 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6752 conditions, 1025 events. 532/1025 cut-off events. For 10404/10404 co-relation queries the response was YES. Maximal size of possible extension queue 127. Compared 5765 event pairs, 47 based on Foata normal form. 3/1008 useless extension candidates. Maximal degree in co-relation 6677. Up to 928 conditions per place. [2024-10-11 14:29:05,997 INFO L140 encePairwiseOnDemand]: 10/18 looper letters, 260 selfloop transitions, 40 changer transitions 7/308 dead transitions. [2024-10-11 14:29:05,997 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 262 places, 308 transitions, 4051 flow [2024-10-11 14:29:05,998 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-10-11 14:29:05,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2024-10-11 14:29:05,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 117 transitions. [2024-10-11 14:29:05,998 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.40625 [2024-10-11 14:29:05,998 INFO L175 Difference]: Start difference. First operand has 249 places, 278 transitions, 3209 flow. Second operand 16 states and 117 transitions. [2024-10-11 14:29:05,998 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 262 places, 308 transitions, 4051 flow [2024-10-11 14:29:06,041 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 242 places, 308 transitions, 3710 flow, removed 110 selfloop flow, removed 20 redundant places. [2024-10-11 14:29:06,044 INFO L231 Difference]: Finished difference. Result has 247 places, 283 transitions, 3089 flow [2024-10-11 14:29:06,045 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=18, PETRI_DIFFERENCE_MINUEND_FLOW=2868, PETRI_DIFFERENCE_MINUEND_PLACES=227, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=278, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=239, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=3089, PETRI_PLACES=247, PETRI_TRANSITIONS=283} [2024-10-11 14:29:06,045 INFO L277 CegarLoopForPetriNet]: 20 programPoint places, 227 predicate places. [2024-10-11 14:29:06,045 INFO L471 AbstractCegarLoop]: Abstraction has has 247 places, 283 transitions, 3089 flow [2024-10-11 14:29:06,045 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 4.777777777777778) internal successors, (86), 18 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 14:29:06,045 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 14:29:06,045 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 14:29:06,057 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2024-10-11 14:29:06,245 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2024-10-11 14:29:06,246 INFO L396 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-11 14:29:06,246 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 14:29:06,246 INFO L85 PathProgramCache]: Analyzing trace with hash -813490627, now seen corresponding path program 18 times [2024-10-11 14:29:06,246 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 14:29:06,246 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2133031187] [2024-10-11 14:29:06,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 14:29:06,246 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 14:29:06,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 14:29:06,488 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 14:29:06,488 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 14:29:06,488 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2133031187] [2024-10-11 14:29:06,488 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2133031187] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-11 14:29:06,488 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [905929438] [2024-10-11 14:29:06,488 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-10-11 14:29:06,488 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 14:29:06,489 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 14:29:06,490 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-11 14:29:06,497 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2024-10-11 14:29:06,538 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2024-10-11 14:29:06,539 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-11 14:29:06,539 INFO L255 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 21 conjuncts are in the unsatisfiable core [2024-10-11 14:29:06,540 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 14:29:06,646 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 14:29:06,646 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-11 14:29:07,335 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 14:29:07,335 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [905929438] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-11 14:29:07,335 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-11 14:29:07,335 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 17 [2024-10-11 14:29:07,335 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [373712534] [2024-10-11 14:29:07,335 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-11 14:29:07,335 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-10-11 14:29:07,336 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 14:29:07,336 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-10-11 14:29:07,336 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=227, Unknown=0, NotChecked=0, Total=306 [2024-10-11 14:29:07,336 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 18 [2024-10-11 14:29:07,336 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 247 places, 283 transitions, 3089 flow. Second operand has 18 states, 18 states have (on average 4.777777777777778) internal successors, (86), 18 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 14:29:07,336 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 14:29:07,336 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 18 [2024-10-11 14:29:07,336 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 14:29:07,905 INFO L124 PetriNetUnfolderBase]: 530/1021 cut-off events. [2024-10-11 14:29:07,906 INFO L125 PetriNetUnfolderBase]: For 8419/8419 co-relation queries the response was YES. [2024-10-11 14:29:07,911 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6495 conditions, 1021 events. 530/1021 cut-off events. For 8419/8419 co-relation queries the response was YES. Maximal size of possible extension queue 126. Compared 5700 event pairs, 44 based on Foata normal form. 2/999 useless extension candidates. Maximal degree in co-relation 6418. Up to 872 conditions per place. [2024-10-11 14:29:07,914 INFO L140 encePairwiseOnDemand]: 10/18 looper letters, 248 selfloop transitions, 59 changer transitions 7/315 dead transitions. [2024-10-11 14:29:07,915 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 263 places, 315 transitions, 3932 flow [2024-10-11 14:29:07,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2024-10-11 14:29:07,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2024-10-11 14:29:07,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 136 transitions. [2024-10-11 14:29:07,919 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.41975308641975306 [2024-10-11 14:29:07,919 INFO L175 Difference]: Start difference. First operand has 247 places, 283 transitions, 3089 flow. Second operand 18 states and 136 transitions. [2024-10-11 14:29:07,919 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 263 places, 315 transitions, 3932 flow [2024-10-11 14:29:07,958 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 251 places, 315 transitions, 3775 flow, removed 47 selfloop flow, removed 12 redundant places. [2024-10-11 14:29:07,962 INFO L231 Difference]: Finished difference. Result has 254 places, 286 transitions, 3162 flow [2024-10-11 14:29:07,963 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=18, PETRI_DIFFERENCE_MINUEND_FLOW=2932, PETRI_DIFFERENCE_MINUEND_PLACES=234, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=283, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=56, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=227, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=3162, PETRI_PLACES=254, PETRI_TRANSITIONS=286} [2024-10-11 14:29:07,963 INFO L277 CegarLoopForPetriNet]: 20 programPoint places, 234 predicate places. [2024-10-11 14:29:07,964 INFO L471 AbstractCegarLoop]: Abstraction has has 254 places, 286 transitions, 3162 flow [2024-10-11 14:29:07,964 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 4.777777777777778) internal successors, (86), 18 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 14:29:07,964 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 14:29:07,964 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 14:29:07,979 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2024-10-11 14:29:08,168 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2024-10-11 14:29:08,169 INFO L396 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-11 14:29:08,169 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 14:29:08,169 INFO L85 PathProgramCache]: Analyzing trace with hash 81618300, now seen corresponding path program 19 times [2024-10-11 14:29:08,169 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 14:29:08,169 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [345888394] [2024-10-11 14:29:08,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 14:29:08,169 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 14:29:08,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 14:29:08,509 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 14:29:08,509 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 14:29:08,509 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [345888394] [2024-10-11 14:29:08,509 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [345888394] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-11 14:29:08,509 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1135067438] [2024-10-11 14:29:08,510 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-10-11 14:29:08,510 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 14:29:08,510 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 14:29:08,511 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-11 14:29:08,511 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2024-10-11 14:29:08,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 14:29:08,587 INFO L255 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 25 conjuncts are in the unsatisfiable core [2024-10-11 14:29:08,588 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 14:29:09,734 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 14:29:09,734 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-11 14:29:16,222 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 14:29:16,222 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1135067438] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-11 14:29:16,222 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-11 14:29:16,222 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 8] total 20 [2024-10-11 14:29:16,223 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1119188745] [2024-10-11 14:29:16,223 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-11 14:29:16,223 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-10-11 14:29:16,223 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 14:29:16,223 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-10-11 14:29:16,223 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=336, Unknown=1, NotChecked=0, Total=420 [2024-10-11 14:29:16,223 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 18 [2024-10-11 14:29:16,224 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 254 places, 286 transitions, 3162 flow. Second operand has 21 states, 21 states have (on average 4.714285714285714) internal successors, (99), 21 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 14:29:16,224 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 14:29:16,224 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 18 [2024-10-11 14:29:16,224 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 14:29:18,484 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.82s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-10-11 14:29:24,937 WARN L286 SmtUtils]: Spent 5.58s on a formula simplification. DAG size of input: 64 DAG size of output: 52 (called from [L 388] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-10-11 14:29:29,013 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-10-11 14:29:31,946 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.89s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-10-11 14:29:35,743 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.48s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-10-11 14:29:40,286 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-10-11 14:29:45,983 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-10-11 14:29:51,926 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers []