./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/chl-name-comparator-symm.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/chl-name-comparator-symm.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 e3298e0ac573b72ea1dd21021e341a1c4e9f42cf513c1ea24a79ab2c37c412bc --- Real Ultimate output --- This is Ultimate 0.2.5-dev-84cfde4 [2024-10-11 14:27:19,739 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-10-11 14:27:19,820 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-10-11 14:27:19,826 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-10-11 14:27:19,827 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-10-11 14:27:19,857 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-10-11 14:27:19,859 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-10-11 14:27:19,860 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-10-11 14:27:19,861 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-10-11 14:27:19,862 INFO L153 SettingsManager]: * Use memory slicer=true [2024-10-11 14:27:19,862 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-10-11 14:27:19,862 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-10-11 14:27:19,863 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-10-11 14:27:19,866 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-10-11 14:27:19,867 INFO L153 SettingsManager]: * Use SBE=true [2024-10-11 14:27:19,867 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-10-11 14:27:19,868 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-10-11 14:27:19,868 INFO L153 SettingsManager]: * sizeof long=4 [2024-10-11 14:27:19,868 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-10-11 14:27:19,868 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-10-11 14:27:19,869 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-10-11 14:27:19,869 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-10-11 14:27:19,869 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-10-11 14:27:19,870 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-10-11 14:27:19,870 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-10-11 14:27:19,870 INFO L153 SettingsManager]: * sizeof long double=12 [2024-10-11 14:27:19,870 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-10-11 14:27:19,871 INFO L153 SettingsManager]: * Use constant arrays=true [2024-10-11 14:27:19,871 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-10-11 14:27:19,871 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-10-11 14:27:19,871 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-10-11 14:27:19,872 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-10-11 14:27:19,872 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-11 14:27:19,872 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-10-11 14:27:19,872 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-10-11 14:27:19,873 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-10-11 14:27:19,873 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-10-11 14:27:19,873 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-10-11 14:27:19,873 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-10-11 14:27:19,873 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-10-11 14:27:19,884 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-10-11 14:27:19,885 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-10-11 14:27:19,885 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> e3298e0ac573b72ea1dd21021e341a1c4e9f42cf513c1ea24a79ab2c37c412bc [2024-10-11 14:27:20,184 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-10-11 14:27:20,213 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-10-11 14:27:20,216 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-10-11 14:27:20,218 INFO L270 PluginConnector]: Initializing CDTParser... [2024-10-11 14:27:20,219 INFO L274 PluginConnector]: CDTParser initialized [2024-10-11 14:27:20,220 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/chl-name-comparator-symm.wvr.c [2024-10-11 14:27:21,741 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-10-11 14:27:21,958 INFO L384 CDTParser]: Found 1 translation units. [2024-10-11 14:27:21,959 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/chl-name-comparator-symm.wvr.c [2024-10-11 14:27:21,970 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/data/20c0a19aa/9b1d283b2eb84ccd955d514fd55a2dda/FLAGf16866b6d [2024-10-11 14:27:21,987 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/data/20c0a19aa/9b1d283b2eb84ccd955d514fd55a2dda [2024-10-11 14:27:21,991 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-10-11 14:27:21,993 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-10-11 14:27:21,996 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-10-11 14:27:21,996 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-10-11 14:27:22,001 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-10-11 14:27:22,002 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.10 02:27:21" (1/1) ... [2024-10-11 14:27:22,003 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@634d856e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:27:22, skipping insertion in model container [2024-10-11 14:27:22,005 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.10 02:27:21" (1/1) ... [2024-10-11 14:27:22,043 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-10-11 14:27:22,241 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/chl-name-comparator-symm.wvr.c[3882,3895] [2024-10-11 14:27:22,251 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-11 14:27:22,261 INFO L200 MainTranslator]: Completed pre-run [2024-10-11 14:27:22,284 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/chl-name-comparator-symm.wvr.c[3882,3895] [2024-10-11 14:27:22,290 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-11 14:27:22,307 INFO L204 MainTranslator]: Completed translation [2024-10-11 14:27:22,308 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:27:22 WrapperNode [2024-10-11 14:27:22,308 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-10-11 14:27:22,309 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-10-11 14:27:22,309 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-10-11 14:27:22,309 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-10-11 14:27:22,316 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:27:22" (1/1) ... [2024-10-11 14:27:22,324 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:27:22" (1/1) ... [2024-10-11 14:27:22,350 INFO L138 Inliner]: procedures = 24, calls = 24, calls flagged for inlining = 14, calls inlined = 16, statements flattened = 219 [2024-10-11 14:27:22,351 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-10-11 14:27:22,352 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-10-11 14:27:22,352 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-10-11 14:27:22,352 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-10-11 14:27:22,362 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:27:22" (1/1) ... [2024-10-11 14:27:22,363 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:27:22" (1/1) ... [2024-10-11 14:27:22,366 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:27:22" (1/1) ... [2024-10-11 14:27:22,386 INFO L175 MemorySlicer]: Split 5 memory accesses to 2 slices as follows [2, 3]. 60 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0]. The 1 writes are split as follows [0, 1]. [2024-10-11 14:27:22,387 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:27:22" (1/1) ... [2024-10-11 14:27:22,387 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:27:22" (1/1) ... [2024-10-11 14:27:22,394 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:27:22" (1/1) ... [2024-10-11 14:27:22,398 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:27:22" (1/1) ... [2024-10-11 14:27:22,399 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:27:22" (1/1) ... [2024-10-11 14:27:22,401 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:27:22" (1/1) ... [2024-10-11 14:27:22,404 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-10-11 14:27:22,405 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-10-11 14:27:22,405 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-10-11 14:27:22,405 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-10-11 14:27:22,406 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:27:22" (1/1) ... [2024-10-11 14:27:22,415 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-11 14:27:22,455 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 14:27:22,477 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 14:27:22,480 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 14:27:22,544 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-10-11 14:27:22,544 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2024-10-11 14:27:22,544 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2024-10-11 14:27:22,544 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2024-10-11 14:27:22,545 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2024-10-11 14:27:22,545 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-10-11 14:27:22,545 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-10-11 14:27:22,545 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-10-11 14:27:22,545 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-10-11 14:27:22,545 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-10-11 14:27:22,545 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-10-11 14:27:22,545 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-10-11 14:27:22,545 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-10-11 14:27:22,546 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-10-11 14:27:22,547 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 14:27:22,667 INFO L238 CfgBuilder]: Building ICFG [2024-10-11 14:27:22,669 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-10-11 14:27:23,053 INFO L283 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2024-10-11 14:27:23,055 INFO L287 CfgBuilder]: Performing block encoding [2024-10-11 14:27:23,408 INFO L309 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-10-11 14:27:23,408 INFO L314 CfgBuilder]: Removed 3 assume(true) statements. [2024-10-11 14:27:23,409 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.10 02:27:23 BoogieIcfgContainer [2024-10-11 14:27:23,409 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-10-11 14:27:23,412 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-10-11 14:27:23,412 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-10-11 14:27:23,416 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-10-11 14:27:23,416 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 11.10 02:27:21" (1/3) ... [2024-10-11 14:27:23,417 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@479bc036 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.10 02:27:23, skipping insertion in model container [2024-10-11 14:27:23,417 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:27:22" (2/3) ... [2024-10-11 14:27:23,418 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@479bc036 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.10 02:27:23, skipping insertion in model container [2024-10-11 14:27:23,419 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.10 02:27:23" (3/3) ... [2024-10-11 14:27:23,421 INFO L112 eAbstractionObserver]: Analyzing ICFG chl-name-comparator-symm.wvr.c [2024-10-11 14:27:23,440 INFO L209 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-10-11 14:27:23,440 INFO L149 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-10-11 14:27:23,440 INFO L484 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-10-11 14:27:23,490 INFO L143 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2024-10-11 14:27:23,528 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 28 places, 26 transitions, 66 flow [2024-10-11 14:27:23,555 INFO L124 PetriNetUnfolderBase]: 5/24 cut-off events. [2024-10-11 14:27:23,555 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-10-11 14:27:23,558 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33 conditions, 24 events. 5/24 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 26 event pairs, 0 based on Foata normal form. 0/18 useless extension candidates. Maximal degree in co-relation 17. Up to 2 conditions per place. [2024-10-11 14:27:23,558 INFO L82 GeneralOperation]: Start removeDead. Operand has 28 places, 26 transitions, 66 flow [2024-10-11 14:27:23,562 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 25 places, 23 transitions, 58 flow [2024-10-11 14:27:23,572 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-10-11 14:27:23,579 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;@47e2f6f8, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-10-11 14:27:23,579 INFO L334 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2024-10-11 14:27:23,591 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-10-11 14:27:23,591 INFO L124 PetriNetUnfolderBase]: 5/22 cut-off events. [2024-10-11 14:27:23,592 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-10-11 14:27:23,592 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 14:27:23,593 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 14:27:23,595 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 14:27:23,601 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 14:27:23,602 INFO L85 PathProgramCache]: Analyzing trace with hash 1373352467, now seen corresponding path program 1 times [2024-10-11 14:27:23,611 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 14:27:23,611 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [762302006] [2024-10-11 14:27:23,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 14:27:23,612 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 14:27:23,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 14:27:23,865 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 14:27:23,866 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 14:27:23,866 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [762302006] [2024-10-11 14:27:23,867 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [762302006] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-11 14:27:23,867 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-11 14:27:23,867 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-10-11 14:27:23,869 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [92938422] [2024-10-11 14:27:23,870 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-11 14:27:23,879 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2024-10-11 14:27:23,884 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 14:27:23,911 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2024-10-11 14:27:23,912 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-10-11 14:27:23,913 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 26 [2024-10-11 14:27:23,916 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 25 places, 23 transitions, 58 flow. Second operand has 2 states, 2 states have (on average 10.5) internal successors, (21), 2 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 14:27:23,916 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 14:27:23,916 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 26 [2024-10-11 14:27:23,918 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 14:27:24,026 INFO L124 PetriNetUnfolderBase]: 92/162 cut-off events. [2024-10-11 14:27:24,027 INFO L125 PetriNetUnfolderBase]: For 15/15 co-relation queries the response was YES. [2024-10-11 14:27:24,028 INFO L83 FinitePrefix]: Finished finitePrefix Result has 345 conditions, 162 events. 92/162 cut-off events. For 15/15 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 386 event pairs, 68 based on Foata normal form. 0/138 useless extension candidates. Maximal degree in co-relation 300. Up to 162 conditions per place. [2024-10-11 14:27:24,031 INFO L140 encePairwiseOnDemand]: 24/26 looper letters, 20 selfloop transitions, 0 changer transitions 0/21 dead transitions. [2024-10-11 14:27:24,031 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 26 places, 21 transitions, 94 flow [2024-10-11 14:27:24,033 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2024-10-11 14:27:24,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2024-10-11 14:27:24,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 28 transitions. [2024-10-11 14:27:24,044 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5384615384615384 [2024-10-11 14:27:24,046 INFO L175 Difference]: Start difference. First operand has 25 places, 23 transitions, 58 flow. Second operand 2 states and 28 transitions. [2024-10-11 14:27:24,047 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 26 places, 21 transitions, 94 flow [2024-10-11 14:27:24,049 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 22 places, 21 transitions, 86 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-10-11 14:27:24,051 INFO L231 Difference]: Finished difference. Result has 22 places, 21 transitions, 46 flow [2024-10-11 14:27:24,053 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=26, PETRI_DIFFERENCE_MINUEND_FLOW=46, PETRI_DIFFERENCE_MINUEND_PLACES=21, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=21, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=46, PETRI_PLACES=22, PETRI_TRANSITIONS=21} [2024-10-11 14:27:24,058 INFO L277 CegarLoopForPetriNet]: 25 programPoint places, -3 predicate places. [2024-10-11 14:27:24,058 INFO L471 AbstractCegarLoop]: Abstraction has has 22 places, 21 transitions, 46 flow [2024-10-11 14:27:24,059 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 10.5) internal successors, (21), 2 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 14:27:24,059 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 14:27:24,059 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 14:27:24,059 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-10-11 14:27:24,060 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 14:27:24,060 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 14:27:24,060 INFO L85 PathProgramCache]: Analyzing trace with hash 322998943, now seen corresponding path program 1 times [2024-10-11 14:27:24,061 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 14:27:24,061 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [648554963] [2024-10-11 14:27:24,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 14:27:24,061 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 14:27:24,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 14:27:24,335 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 14:27:24,336 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 14:27:24,336 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [648554963] [2024-10-11 14:27:24,336 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [648554963] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-11 14:27:24,337 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-11 14:27:24,337 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-10-11 14:27:24,337 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1963876795] [2024-10-11 14:27:24,337 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-11 14:27:24,339 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-11 14:27:24,339 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 14:27:24,340 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-11 14:27:24,340 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-11 14:27:24,340 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 26 [2024-10-11 14:27:24,340 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 22 places, 21 transitions, 46 flow. Second operand has 3 states, 3 states have (on average 8.666666666666666) internal successors, (26), 3 states have internal predecessors, (26), 0 states have call successors, (0), 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 14:27:24,341 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 14:27:24,341 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 26 [2024-10-11 14:27:24,341 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 14:27:24,432 INFO L124 PetriNetUnfolderBase]: 92/163 cut-off events. [2024-10-11 14:27:24,433 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2024-10-11 14:27:24,434 INFO L83 FinitePrefix]: Finished finitePrefix Result has 334 conditions, 163 events. 92/163 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 391 event pairs, 68 based on Foata normal form. 0/139 useless extension candidates. Maximal degree in co-relation 331. Up to 162 conditions per place. [2024-10-11 14:27:24,435 INFO L140 encePairwiseOnDemand]: 23/26 looper letters, 19 selfloop transitions, 2 changer transitions 0/22 dead transitions. [2024-10-11 14:27:24,435 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 24 places, 22 transitions, 90 flow [2024-10-11 14:27:24,436 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-11 14:27:24,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-10-11 14:27:24,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 31 transitions. [2024-10-11 14:27:24,437 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.3974358974358974 [2024-10-11 14:27:24,438 INFO L175 Difference]: Start difference. First operand has 22 places, 21 transitions, 46 flow. Second operand 3 states and 31 transitions. [2024-10-11 14:27:24,438 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 24 places, 22 transitions, 90 flow [2024-10-11 14:27:24,438 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 24 places, 22 transitions, 90 flow, removed 0 selfloop flow, removed 0 redundant places. [2024-10-11 14:27:24,440 INFO L231 Difference]: Finished difference. Result has 25 places, 22 transitions, 58 flow [2024-10-11 14:27:24,440 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=26, PETRI_DIFFERENCE_MINUEND_FLOW=46, PETRI_DIFFERENCE_MINUEND_PLACES=22, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=21, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=19, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=58, PETRI_PLACES=25, PETRI_TRANSITIONS=22} [2024-10-11 14:27:24,441 INFO L277 CegarLoopForPetriNet]: 25 programPoint places, 0 predicate places. [2024-10-11 14:27:24,441 INFO L471 AbstractCegarLoop]: Abstraction has has 25 places, 22 transitions, 58 flow [2024-10-11 14:27:24,442 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 8.666666666666666) internal successors, (26), 3 states have internal predecessors, (26), 0 states have call successors, (0), 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 14:27:24,442 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 14:27:24,442 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 14:27:24,443 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-10-11 14:27:24,443 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 14:27:24,444 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 14:27:24,445 INFO L85 PathProgramCache]: Analyzing trace with hash 397278911, now seen corresponding path program 1 times [2024-10-11 14:27:24,445 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 14:27:24,446 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1116577988] [2024-10-11 14:27:24,446 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 14:27:24,446 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 14:27:24,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 14:27:24,625 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 14:27:24,625 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 14:27:24,625 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1116577988] [2024-10-11 14:27:24,626 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1116577988] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-11 14:27:24,626 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1610542023] [2024-10-11 14:27:24,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 14:27:24,626 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 14:27:24,627 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 14:27:24,628 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 14:27:24,630 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 14:27:24,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 14:27:24,762 INFO L255 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 5 conjuncts are in the unsatisfiable core [2024-10-11 14:27:24,767 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 14:27:24,856 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 14:27:24,860 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-11 14:27:24,886 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 14:27:24,887 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1610542023] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-11 14:27:24,887 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-11 14:27:24,887 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2024-10-11 14:27:24,888 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [548001517] [2024-10-11 14:27:24,888 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-11 14:27:24,888 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-10-11 14:27:24,890 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 14:27:24,890 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-10-11 14:27:24,891 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-10-11 14:27:24,891 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 26 [2024-10-11 14:27:24,891 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 25 places, 22 transitions, 58 flow. Second operand has 7 states, 7 states have (on average 6.428571428571429) internal successors, (45), 7 states have internal predecessors, (45), 0 states have call successors, (0), 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 14:27:24,893 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 14:27:24,893 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 26 [2024-10-11 14:27:24,893 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 14:27:25,007 INFO L124 PetriNetUnfolderBase]: 92/165 cut-off events. [2024-10-11 14:27:25,008 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2024-10-11 14:27:25,008 INFO L83 FinitePrefix]: Finished finitePrefix Result has 347 conditions, 165 events. 92/165 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 391 event pairs, 68 based on Foata normal form. 0/141 useless extension candidates. Maximal degree in co-relation 342. Up to 162 conditions per place. [2024-10-11 14:27:25,011 INFO L140 encePairwiseOnDemand]: 23/26 looper letters, 19 selfloop transitions, 4 changer transitions 0/24 dead transitions. [2024-10-11 14:27:25,012 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 29 places, 24 transitions, 112 flow [2024-10-11 14:27:25,013 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-10-11 14:27:25,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-10-11 14:27:25,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 40 transitions. [2024-10-11 14:27:25,014 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.3076923076923077 [2024-10-11 14:27:25,014 INFO L175 Difference]: Start difference. First operand has 25 places, 22 transitions, 58 flow. Second operand 5 states and 40 transitions. [2024-10-11 14:27:25,014 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 29 places, 24 transitions, 112 flow [2024-10-11 14:27:25,015 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 28 places, 24 transitions, 108 flow, removed 1 selfloop flow, removed 1 redundant places. [2024-10-11 14:27:25,016 INFO L231 Difference]: Finished difference. Result has 30 places, 24 transitions, 80 flow [2024-10-11 14:27:25,016 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=26, PETRI_DIFFERENCE_MINUEND_FLOW=54, PETRI_DIFFERENCE_MINUEND_PLACES=24, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=22, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=19, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=80, PETRI_PLACES=30, PETRI_TRANSITIONS=24} [2024-10-11 14:27:25,016 INFO L277 CegarLoopForPetriNet]: 25 programPoint places, 5 predicate places. [2024-10-11 14:27:25,016 INFO L471 AbstractCegarLoop]: Abstraction has has 30 places, 24 transitions, 80 flow [2024-10-11 14:27:25,017 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 6.428571428571429) internal successors, (45), 7 states have internal predecessors, (45), 0 states have call successors, (0), 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 14:27:25,017 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 14:27:25,017 INFO L204 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 14:27:25,038 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-10-11 14:27:25,219 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 14:27:25,220 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 14:27:25,220 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 14:27:25,220 INFO L85 PathProgramCache]: Analyzing trace with hash 1068563135, now seen corresponding path program 2 times [2024-10-11 14:27:25,221 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 14:27:25,221 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [967767437] [2024-10-11 14:27:25,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 14:27:25,221 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 14:27:25,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 14:27:25,769 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-10-11 14:27:25,769 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 14:27:25,770 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [967767437] [2024-10-11 14:27:25,770 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [967767437] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-11 14:27:25,770 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-11 14:27:25,770 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-10-11 14:27:25,770 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [694138156] [2024-10-11 14:27:25,770 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-11 14:27:25,770 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-10-11 14:27:25,771 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 14:27:25,771 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-10-11 14:27:25,771 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-10-11 14:27:25,771 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 26 [2024-10-11 14:27:25,772 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 30 places, 24 transitions, 80 flow. Second operand has 6 states, 6 states have (on average 6.0) internal successors, (36), 6 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 14:27:25,772 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 14:27:25,772 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 26 [2024-10-11 14:27:25,772 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 14:27:26,075 INFO L124 PetriNetUnfolderBase]: 222/403 cut-off events. [2024-10-11 14:27:26,075 INFO L125 PetriNetUnfolderBase]: For 6/6 co-relation queries the response was YES. [2024-10-11 14:27:26,077 INFO L83 FinitePrefix]: Finished finitePrefix Result has 834 conditions, 403 events. 222/403 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 28. Compared 1539 event pairs, 68 based on Foata normal form. 1/343 useless extension candidates. Maximal degree in co-relation 827. Up to 173 conditions per place. [2024-10-11 14:27:26,078 INFO L140 encePairwiseOnDemand]: 20/26 looper letters, 44 selfloop transitions, 4 changer transitions 8/57 dead transitions. [2024-10-11 14:27:26,079 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 34 places, 57 transitions, 265 flow [2024-10-11 14:27:26,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-10-11 14:27:26,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-10-11 14:27:26,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 70 transitions. [2024-10-11 14:27:26,081 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5384615384615384 [2024-10-11 14:27:26,081 INFO L175 Difference]: Start difference. First operand has 30 places, 24 transitions, 80 flow. Second operand 5 states and 70 transitions. [2024-10-11 14:27:26,082 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 34 places, 57 transitions, 265 flow [2024-10-11 14:27:26,083 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 33 places, 57 transitions, 255 flow, removed 4 selfloop flow, removed 1 redundant places. [2024-10-11 14:27:26,085 INFO L231 Difference]: Finished difference. Result has 36 places, 27 transitions, 99 flow [2024-10-11 14:27:26,086 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=26, PETRI_DIFFERENCE_MINUEND_FLOW=70, PETRI_DIFFERENCE_MINUEND_PLACES=29, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=24, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=99, PETRI_PLACES=36, PETRI_TRANSITIONS=27} [2024-10-11 14:27:26,087 INFO L277 CegarLoopForPetriNet]: 25 programPoint places, 11 predicate places. [2024-10-11 14:27:26,087 INFO L471 AbstractCegarLoop]: Abstraction has has 36 places, 27 transitions, 99 flow [2024-10-11 14:27:26,087 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 6.0) internal successors, (36), 6 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 14:27:26,087 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 14:27:26,087 INFO L204 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 14:27:26,088 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-10-11 14:27:26,088 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 14:27:26,089 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 14:27:26,090 INFO L85 PathProgramCache]: Analyzing trace with hash -709564833, now seen corresponding path program 3 times [2024-10-11 14:27:26,091 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 14:27:26,091 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [818837437] [2024-10-11 14:27:26,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 14:27:26,091 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 14:27:26,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 14:27:26,430 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-10-11 14:27:26,430 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 14:27:26,431 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [818837437] [2024-10-11 14:27:26,431 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [818837437] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-11 14:27:26,431 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-11 14:27:26,431 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-10-11 14:27:26,431 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [61857848] [2024-10-11 14:27:26,431 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-11 14:27:26,431 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-10-11 14:27:26,432 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 14:27:26,432 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-10-11 14:27:26,432 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-10-11 14:27:26,432 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 26 [2024-10-11 14:27:26,433 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 36 places, 27 transitions, 99 flow. Second operand has 6 states, 6 states have (on average 6.0) internal successors, (36), 6 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 14:27:26,433 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 14:27:26,433 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 26 [2024-10-11 14:27:26,433 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 14:27:26,685 INFO L124 PetriNetUnfolderBase]: 371/674 cut-off events. [2024-10-11 14:27:26,685 INFO L125 PetriNetUnfolderBase]: For 184/184 co-relation queries the response was YES. [2024-10-11 14:27:26,687 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1619 conditions, 674 events. 371/674 cut-off events. For 184/184 co-relation queries the response was YES. Maximal size of possible extension queue 46. Compared 2858 event pairs, 177 based on Foata normal form. 3/677 useless extension candidates. Maximal degree in co-relation 1608. Up to 384 conditions per place. [2024-10-11 14:27:26,690 INFO L140 encePairwiseOnDemand]: 20/26 looper letters, 45 selfloop transitions, 4 changer transitions 7/57 dead transitions. [2024-10-11 14:27:26,690 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 39 places, 57 transitions, 308 flow [2024-10-11 14:27:26,691 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-10-11 14:27:26,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-10-11 14:27:26,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 63 transitions. [2024-10-11 14:27:26,692 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4846153846153846 [2024-10-11 14:27:26,692 INFO L175 Difference]: Start difference. First operand has 36 places, 27 transitions, 99 flow. Second operand 5 states and 63 transitions. [2024-10-11 14:27:26,692 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 39 places, 57 transitions, 308 flow [2024-10-11 14:27:26,696 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 38 places, 57 transitions, 300 flow, removed 4 selfloop flow, removed 1 redundant places. [2024-10-11 14:27:26,697 INFO L231 Difference]: Finished difference. Result has 41 places, 29 transitions, 122 flow [2024-10-11 14:27:26,697 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=26, PETRI_DIFFERENCE_MINUEND_FLOW=95, PETRI_DIFFERENCE_MINUEND_PLACES=34, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=27, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=122, PETRI_PLACES=41, PETRI_TRANSITIONS=29} [2024-10-11 14:27:26,698 INFO L277 CegarLoopForPetriNet]: 25 programPoint places, 16 predicate places. [2024-10-11 14:27:26,698 INFO L471 AbstractCegarLoop]: Abstraction has has 41 places, 29 transitions, 122 flow [2024-10-11 14:27:26,698 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 6.0) internal successors, (36), 6 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 14:27:26,698 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 14:27:26,699 INFO L204 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 14:27:26,699 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-10-11 14:27:26,699 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 14:27:26,699 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 14:27:26,700 INFO L85 PathProgramCache]: Analyzing trace with hash 1546106423, now seen corresponding path program 4 times [2024-10-11 14:27:26,700 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 14:27:26,700 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1025182989] [2024-10-11 14:27:26,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 14:27:26,700 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 14:27:26,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 14:27:27,075 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-10-11 14:27:27,076 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 14:27:27,076 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1025182989] [2024-10-11 14:27:27,076 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1025182989] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-11 14:27:27,076 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-11 14:27:27,077 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-10-11 14:27:27,077 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [34237162] [2024-10-11 14:27:27,077 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-11 14:27:27,077 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-10-11 14:27:27,078 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 14:27:27,079 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-10-11 14:27:27,079 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-10-11 14:27:27,080 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 26 [2024-10-11 14:27:27,080 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 29 transitions, 122 flow. Second operand has 6 states, 6 states have (on average 6.0) internal successors, (36), 6 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 14:27:27,080 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 14:27:27,081 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 26 [2024-10-11 14:27:27,081 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 14:27:27,338 INFO L124 PetriNetUnfolderBase]: 356/632 cut-off events. [2024-10-11 14:27:27,339 INFO L125 PetriNetUnfolderBase]: For 396/396 co-relation queries the response was YES. [2024-10-11 14:27:27,340 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1696 conditions, 632 events. 356/632 cut-off events. For 396/396 co-relation queries the response was YES. Maximal size of possible extension queue 43. Compared 2667 event pairs, 158 based on Foata normal form. 4/636 useless extension candidates. Maximal degree in co-relation 1682. Up to 291 conditions per place. [2024-10-11 14:27:27,343 INFO L140 encePairwiseOnDemand]: 20/26 looper letters, 46 selfloop transitions, 4 changer transitions 9/60 dead transitions. [2024-10-11 14:27:27,343 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 60 transitions, 345 flow [2024-10-11 14:27:27,344 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-10-11 14:27:27,344 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-10-11 14:27:27,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 66 transitions. [2024-10-11 14:27:27,344 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5076923076923077 [2024-10-11 14:27:27,345 INFO L175 Difference]: Start difference. First operand has 41 places, 29 transitions, 122 flow. Second operand 5 states and 66 transitions. [2024-10-11 14:27:27,345 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 60 transitions, 345 flow [2024-10-11 14:27:27,347 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 60 transitions, 333 flow, removed 3 selfloop flow, removed 2 redundant places. [2024-10-11 14:27:27,348 INFO L231 Difference]: Finished difference. Result has 45 places, 30 transitions, 140 flow [2024-10-11 14:27:27,348 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=26, PETRI_DIFFERENCE_MINUEND_FLOW=115, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=29, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=140, PETRI_PLACES=45, PETRI_TRANSITIONS=30} [2024-10-11 14:27:27,349 INFO L277 CegarLoopForPetriNet]: 25 programPoint places, 20 predicate places. [2024-10-11 14:27:27,349 INFO L471 AbstractCegarLoop]: Abstraction has has 45 places, 30 transitions, 140 flow [2024-10-11 14:27:27,349 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 6.0) internal successors, (36), 6 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 14:27:27,349 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 14:27:27,350 INFO L204 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 14:27:27,350 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-10-11 14:27:27,350 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 14:27:27,350 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 14:27:27,351 INFO L85 PathProgramCache]: Analyzing trace with hash -513537359, now seen corresponding path program 5 times [2024-10-11 14:27:27,351 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 14:27:27,351 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1408003240] [2024-10-11 14:27:27,351 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 14:27:27,351 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 14:27:27,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 14:27:27,711 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-10-11 14:27:27,712 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 14:27:27,712 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1408003240] [2024-10-11 14:27:27,712 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1408003240] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-11 14:27:27,712 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-11 14:27:27,713 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-10-11 14:27:27,713 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [302857829] [2024-10-11 14:27:27,713 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-11 14:27:27,713 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-10-11 14:27:27,714 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 14:27:27,715 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-10-11 14:27:27,715 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-10-11 14:27:27,715 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 26 [2024-10-11 14:27:27,716 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 30 transitions, 140 flow. Second operand has 6 states, 6 states have (on average 6.0) internal successors, (36), 6 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 14:27:27,716 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 14:27:27,716 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 26 [2024-10-11 14:27:27,716 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 14:27:27,976 INFO L124 PetriNetUnfolderBase]: 396/694 cut-off events. [2024-10-11 14:27:27,977 INFO L125 PetriNetUnfolderBase]: For 741/741 co-relation queries the response was YES. [2024-10-11 14:27:27,979 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1993 conditions, 694 events. 396/694 cut-off events. For 741/741 co-relation queries the response was YES. Maximal size of possible extension queue 45. Compared 2897 event pairs, 151 based on Foata normal form. 6/700 useless extension candidates. Maximal degree in co-relation 1977. Up to 368 conditions per place. [2024-10-11 14:27:27,982 INFO L140 encePairwiseOnDemand]: 20/26 looper letters, 46 selfloop transitions, 5 changer transitions 9/61 dead transitions. [2024-10-11 14:27:27,982 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 61 transitions, 385 flow [2024-10-11 14:27:27,982 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-10-11 14:27:27,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-10-11 14:27:27,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 66 transitions. [2024-10-11 14:27:27,983 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5076923076923077 [2024-10-11 14:27:27,984 INFO L175 Difference]: Start difference. First operand has 45 places, 30 transitions, 140 flow. Second operand 5 states and 66 transitions. [2024-10-11 14:27:27,984 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 61 transitions, 385 flow [2024-10-11 14:27:27,987 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 61 transitions, 363 flow, removed 8 selfloop flow, removed 2 redundant places. [2024-10-11 14:27:27,988 INFO L231 Difference]: Finished difference. Result has 49 places, 32 transitions, 170 flow [2024-10-11 14:27:27,988 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=26, PETRI_DIFFERENCE_MINUEND_FLOW=131, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=30, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=170, PETRI_PLACES=49, PETRI_TRANSITIONS=32} [2024-10-11 14:27:27,989 INFO L277 CegarLoopForPetriNet]: 25 programPoint places, 24 predicate places. [2024-10-11 14:27:27,990 INFO L471 AbstractCegarLoop]: Abstraction has has 49 places, 32 transitions, 170 flow [2024-10-11 14:27:27,990 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 6.0) internal successors, (36), 6 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 14:27:27,990 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 14:27:27,991 INFO L204 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 14:27:27,991 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-10-11 14:27:27,991 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 14:27:27,992 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 14:27:27,992 INFO L85 PathProgramCache]: Analyzing trace with hash -1658143472, now seen corresponding path program 1 times [2024-10-11 14:27:27,992 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 14:27:27,993 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1004689562] [2024-10-11 14:27:27,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 14:27:27,993 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 14:27:28,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 14:27:28,121 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-10-11 14:27:28,121 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 14:27:28,121 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1004689562] [2024-10-11 14:27:28,122 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1004689562] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-11 14:27:28,122 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [846894843] [2024-10-11 14:27:28,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 14:27:28,122 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 14:27:28,122 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 14:27:28,124 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 14:27:28,125 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 14:27:28,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 14:27:28,232 INFO L255 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-10-11 14:27:28,234 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 14:27:28,308 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-10-11 14:27:28,309 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-11 14:27:28,376 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-10-11 14:27:28,376 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [846894843] provided 1 perfect and 1 imperfect interpolant sequences [2024-10-11 14:27:28,376 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-10-11 14:27:28,376 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5, 5] total 8 [2024-10-11 14:27:28,377 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1613769261] [2024-10-11 14:27:28,377 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-11 14:27:28,377 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-10-11 14:27:28,378 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 14:27:28,378 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-10-11 14:27:28,378 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-10-11 14:27:28,378 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 26 [2024-10-11 14:27:28,379 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 49 places, 32 transitions, 170 flow. Second operand has 5 states, 5 states have (on average 7.0) internal successors, (35), 5 states have internal predecessors, (35), 0 states have call successors, (0), 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 14:27:28,379 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 14:27:28,379 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 26 [2024-10-11 14:27:28,379 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 14:27:28,566 INFO L124 PetriNetUnfolderBase]: 413/718 cut-off events. [2024-10-11 14:27:28,567 INFO L125 PetriNetUnfolderBase]: For 915/915 co-relation queries the response was YES. [2024-10-11 14:27:28,569 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2119 conditions, 718 events. 413/718 cut-off events. For 915/915 co-relation queries the response was YES. Maximal size of possible extension queue 48. Compared 3132 event pairs, 40 based on Foata normal form. 9/727 useless extension candidates. Maximal degree in co-relation 2101. Up to 318 conditions per place. [2024-10-11 14:27:28,572 INFO L140 encePairwiseOnDemand]: 21/26 looper letters, 57 selfloop transitions, 6 changer transitions 2/66 dead transitions. [2024-10-11 14:27:28,573 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 52 places, 66 transitions, 428 flow [2024-10-11 14:27:28,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-10-11 14:27:28,573 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-10-11 14:27:28,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 68 transitions. [2024-10-11 14:27:28,576 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5230769230769231 [2024-10-11 14:27:28,576 INFO L175 Difference]: Start difference. First operand has 49 places, 32 transitions, 170 flow. Second operand 5 states and 68 transitions. [2024-10-11 14:27:28,576 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 52 places, 66 transitions, 428 flow [2024-10-11 14:27:28,581 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 66 transitions, 407 flow, removed 6 selfloop flow, removed 2 redundant places. [2024-10-11 14:27:28,583 INFO L231 Difference]: Finished difference. Result has 52 places, 34 transitions, 196 flow [2024-10-11 14:27:28,584 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=26, PETRI_DIFFERENCE_MINUEND_FLOW=158, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=32, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=196, PETRI_PLACES=52, PETRI_TRANSITIONS=34} [2024-10-11 14:27:28,585 INFO L277 CegarLoopForPetriNet]: 25 programPoint places, 27 predicate places. [2024-10-11 14:27:28,585 INFO L471 AbstractCegarLoop]: Abstraction has has 52 places, 34 transitions, 196 flow [2024-10-11 14:27:28,587 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 7.0) internal successors, (35), 5 states have internal predecessors, (35), 0 states have call successors, (0), 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 14:27:28,587 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 14:27:28,587 INFO L204 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 14:27:28,605 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2024-10-11 14:27:28,787 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,3 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 14:27:28,788 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 14:27:28,788 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 14:27:28,788 INFO L85 PathProgramCache]: Analyzing trace with hash 1577565820, now seen corresponding path program 1 times [2024-10-11 14:27:28,789 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 14:27:28,789 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [692664249] [2024-10-11 14:27:28,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 14:27:28,789 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 14:27:28,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 14:27:28,915 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-10-11 14:27:28,915 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 14:27:28,915 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [692664249] [2024-10-11 14:27:28,916 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [692664249] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-11 14:27:28,916 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2090056899] [2024-10-11 14:27:28,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 14:27:28,916 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 14:27:28,916 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 14:27:28,918 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 14:27:28,920 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 14:27:29,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 14:27:29,025 INFO L255 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-10-11 14:27:29,027 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 14:27:29,074 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-10-11 14:27:29,075 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-11 14:27:29,114 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-10-11 14:27:29,116 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2090056899] provided 1 perfect and 1 imperfect interpolant sequences [2024-10-11 14:27:29,116 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-10-11 14:27:29,116 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5, 5] total 8 [2024-10-11 14:27:29,117 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [620811272] [2024-10-11 14:27:29,117 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-11 14:27:29,119 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-10-11 14:27:29,119 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 14:27:29,119 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-10-11 14:27:29,119 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-10-11 14:27:29,120 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 26 [2024-10-11 14:27:29,120 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 34 transitions, 196 flow. Second operand has 5 states, 5 states have (on average 7.0) internal successors, (35), 5 states have internal predecessors, (35), 0 states have call successors, (0), 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 14:27:29,120 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 14:27:29,120 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 26 [2024-10-11 14:27:29,120 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 14:27:29,332 INFO L124 PetriNetUnfolderBase]: 449/778 cut-off events. [2024-10-11 14:27:29,333 INFO L125 PetriNetUnfolderBase]: For 1358/1358 co-relation queries the response was YES. [2024-10-11 14:27:29,335 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2299 conditions, 778 events. 449/778 cut-off events. For 1358/1358 co-relation queries the response was YES. Maximal size of possible extension queue 54. Compared 3338 event pairs, 87 based on Foata normal form. 8/786 useless extension candidates. Maximal degree in co-relation 2280. Up to 339 conditions per place. [2024-10-11 14:27:29,338 INFO L140 encePairwiseOnDemand]: 21/26 looper letters, 53 selfloop transitions, 8 changer transitions 2/64 dead transitions. [2024-10-11 14:27:29,338 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 64 transitions, 450 flow [2024-10-11 14:27:29,338 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-10-11 14:27:29,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-10-11 14:27:29,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 64 transitions. [2024-10-11 14:27:29,339 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.49230769230769234 [2024-10-11 14:27:29,339 INFO L175 Difference]: Start difference. First operand has 52 places, 34 transitions, 196 flow. Second operand 5 states and 64 transitions. [2024-10-11 14:27:29,339 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 64 transitions, 450 flow [2024-10-11 14:27:29,342 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 64 transitions, 436 flow, removed 1 selfloop flow, removed 2 redundant places. [2024-10-11 14:27:29,343 INFO L231 Difference]: Finished difference. Result has 56 places, 36 transitions, 235 flow [2024-10-11 14:27:29,344 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=26, PETRI_DIFFERENCE_MINUEND_FLOW=188, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=34, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=235, PETRI_PLACES=56, PETRI_TRANSITIONS=36} [2024-10-11 14:27:29,344 INFO L277 CegarLoopForPetriNet]: 25 programPoint places, 31 predicate places. [2024-10-11 14:27:29,345 INFO L471 AbstractCegarLoop]: Abstraction has has 56 places, 36 transitions, 235 flow [2024-10-11 14:27:29,345 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 7.0) internal successors, (35), 5 states have internal predecessors, (35), 0 states have call successors, (0), 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 14:27:29,345 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 14:27:29,345 INFO L204 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 14:27:29,363 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 14:27:29,546 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,4 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 14:27:29,547 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 14:27:29,547 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 14:27:29,548 INFO L85 PathProgramCache]: Analyzing trace with hash -307064914, now seen corresponding path program 2 times [2024-10-11 14:27:29,548 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 14:27:29,548 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1600323562] [2024-10-11 14:27:29,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 14:27:29,548 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 14:27:29,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 14:27:29,678 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-10-11 14:27:29,679 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 14:27:29,679 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1600323562] [2024-10-11 14:27:29,679 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1600323562] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-11 14:27:29,679 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [549253813] [2024-10-11 14:27:29,679 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-11 14:27:29,679 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 14:27:29,680 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 14:27:29,681 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 14:27:29,683 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 14:27:29,778 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-11 14:27:29,778 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-11 14:27:29,780 INFO L255 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-10-11 14:27:29,781 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 14:27:29,937 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-10-11 14:27:29,938 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-11 14:27:30,018 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-10-11 14:27:30,019 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [549253813] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-11 14:27:30,019 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-11 14:27:30,019 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 11 [2024-10-11 14:27:30,019 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [473511382] [2024-10-11 14:27:30,019 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-11 14:27:30,020 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-10-11 14:27:30,020 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 14:27:30,021 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-10-11 14:27:30,021 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2024-10-11 14:27:30,021 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 26 [2024-10-11 14:27:30,021 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 36 transitions, 235 flow. Second operand has 11 states, 11 states have (on average 6.818181818181818) internal successors, (75), 11 states have internal predecessors, (75), 0 states have call successors, (0), 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 14:27:30,022 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 14:27:30,022 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 26 [2024-10-11 14:27:30,022 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 14:27:30,434 INFO L124 PetriNetUnfolderBase]: 479/835 cut-off events. [2024-10-11 14:27:30,434 INFO L125 PetriNetUnfolderBase]: For 1916/1916 co-relation queries the response was YES. [2024-10-11 14:27:30,437 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2542 conditions, 835 events. 479/835 cut-off events. For 1916/1916 co-relation queries the response was YES. Maximal size of possible extension queue 56. Compared 3741 event pairs, 80 based on Foata normal form. 9/844 useless extension candidates. Maximal degree in co-relation 2521. Up to 295 conditions per place. [2024-10-11 14:27:30,441 INFO L140 encePairwiseOnDemand]: 21/26 looper letters, 72 selfloop transitions, 14 changer transitions 5/92 dead transitions. [2024-10-11 14:27:30,441 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 92 transitions, 608 flow [2024-10-11 14:27:30,442 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-10-11 14:27:30,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-10-11 14:27:30,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 105 transitions. [2024-10-11 14:27:30,442 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5048076923076923 [2024-10-11 14:27:30,443 INFO L175 Difference]: Start difference. First operand has 56 places, 36 transitions, 235 flow. Second operand 8 states and 105 transitions. [2024-10-11 14:27:30,443 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 92 transitions, 608 flow [2024-10-11 14:27:30,447 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 92 transitions, 593 flow, removed 1 selfloop flow, removed 2 redundant places. [2024-10-11 14:27:30,449 INFO L231 Difference]: Finished difference. Result has 63 places, 41 transitions, 308 flow [2024-10-11 14:27:30,449 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=26, PETRI_DIFFERENCE_MINUEND_FLOW=224, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=36, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=308, PETRI_PLACES=63, PETRI_TRANSITIONS=41} [2024-10-11 14:27:30,450 INFO L277 CegarLoopForPetriNet]: 25 programPoint places, 38 predicate places. [2024-10-11 14:27:30,450 INFO L471 AbstractCegarLoop]: Abstraction has has 63 places, 41 transitions, 308 flow [2024-10-11 14:27:30,450 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 6.818181818181818) internal successors, (75), 11 states have internal predecessors, (75), 0 states have call successors, (0), 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 14:27:30,451 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 14:27:30,451 INFO L204 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 14:27:30,468 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 14:27:30,654 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2024-10-11 14:27:30,655 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 14:27:30,655 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 14:27:30,655 INFO L85 PathProgramCache]: Analyzing trace with hash 1555071804, now seen corresponding path program 3 times [2024-10-11 14:27:30,655 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 14:27:30,656 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1428960430] [2024-10-11 14:27:30,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 14:27:30,656 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 14:27:30,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 14:27:30,771 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-10-11 14:27:30,772 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 14:27:30,772 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1428960430] [2024-10-11 14:27:30,772 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1428960430] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-11 14:27:30,772 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-11 14:27:30,772 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-10-11 14:27:30,773 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [640423920] [2024-10-11 14:27:30,773 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-11 14:27:30,773 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-10-11 14:27:30,773 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 14:27:30,774 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-10-11 14:27:30,774 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-10-11 14:27:30,774 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 26 [2024-10-11 14:27:30,774 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 41 transitions, 308 flow. Second operand has 5 states, 5 states have (on average 7.0) internal successors, (35), 5 states have internal predecessors, (35), 0 states have call successors, (0), 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 14:27:30,774 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 14:27:30,775 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 26 [2024-10-11 14:27:30,775 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 14:27:30,984 INFO L124 PetriNetUnfolderBase]: 473/817 cut-off events. [2024-10-11 14:27:30,985 INFO L125 PetriNetUnfolderBase]: For 2118/2118 co-relation queries the response was YES. [2024-10-11 14:27:30,988 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2648 conditions, 817 events. 473/817 cut-off events. For 2118/2118 co-relation queries the response was YES. Maximal size of possible extension queue 56. Compared 3603 event pairs, 227 based on Foata normal form. 2/819 useless extension candidates. Maximal degree in co-relation 2625. Up to 469 conditions per place. [2024-10-11 14:27:30,992 INFO L140 encePairwiseOnDemand]: 21/26 looper letters, 46 selfloop transitions, 9 changer transitions 7/63 dead transitions. [2024-10-11 14:27:30,992 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 63 transitions, 499 flow [2024-10-11 14:27:30,993 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-10-11 14:27:30,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-10-11 14:27:30,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 62 transitions. [2024-10-11 14:27:30,994 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.47692307692307695 [2024-10-11 14:27:30,994 INFO L175 Difference]: Start difference. First operand has 63 places, 41 transitions, 308 flow. Second operand 5 states and 62 transitions. [2024-10-11 14:27:30,994 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 63 transitions, 499 flow [2024-10-11 14:27:31,000 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 63 transitions, 485 flow, removed 2 selfloop flow, removed 2 redundant places. [2024-10-11 14:27:31,003 INFO L231 Difference]: Finished difference. Result has 65 places, 40 transitions, 300 flow [2024-10-11 14:27:31,004 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=26, PETRI_DIFFERENCE_MINUEND_FLOW=294, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=300, PETRI_PLACES=65, PETRI_TRANSITIONS=40} [2024-10-11 14:27:31,004 INFO L277 CegarLoopForPetriNet]: 25 programPoint places, 40 predicate places. [2024-10-11 14:27:31,004 INFO L471 AbstractCegarLoop]: Abstraction has has 65 places, 40 transitions, 300 flow [2024-10-11 14:27:31,004 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 7.0) internal successors, (35), 5 states have internal predecessors, (35), 0 states have call successors, (0), 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 14:27:31,005 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 14:27:31,005 INFO L204 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 14:27:31,005 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-10-11 14:27:31,005 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 14:27:31,005 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 14:27:31,005 INFO L85 PathProgramCache]: Analyzing trace with hash 398039530, now seen corresponding path program 2 times [2024-10-11 14:27:31,005 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 14:27:31,006 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [437191442] [2024-10-11 14:27:31,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 14:27:31,006 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 14:27:31,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 14:27:31,144 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-10-11 14:27:31,144 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 14:27:31,144 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [437191442] [2024-10-11 14:27:31,145 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [437191442] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-11 14:27:31,145 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-11 14:27:31,145 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-10-11 14:27:31,145 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1435790790] [2024-10-11 14:27:31,147 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-11 14:27:31,148 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-10-11 14:27:31,148 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 14:27:31,148 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-10-11 14:27:31,148 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-10-11 14:27:31,149 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 26 [2024-10-11 14:27:31,149 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 40 transitions, 300 flow. Second operand has 5 states, 5 states have (on average 7.0) internal successors, (35), 5 states have internal predecessors, (35), 0 states have call successors, (0), 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 14:27:31,149 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 14:27:31,149 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 26 [2024-10-11 14:27:31,149 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 14:27:31,358 INFO L124 PetriNetUnfolderBase]: 462/798 cut-off events. [2024-10-11 14:27:31,358 INFO L125 PetriNetUnfolderBase]: For 2228/2228 co-relation queries the response was YES. [2024-10-11 14:27:31,361 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2550 conditions, 798 events. 462/798 cut-off events. For 2228/2228 co-relation queries the response was YES. Maximal size of possible extension queue 55. Compared 3430 event pairs, 221 based on Foata normal form. 3/801 useless extension candidates. Maximal degree in co-relation 2526. Up to 443 conditions per place. [2024-10-11 14:27:31,364 INFO L140 encePairwiseOnDemand]: 21/26 looper letters, 40 selfloop transitions, 12 changer transitions 7/60 dead transitions. [2024-10-11 14:27:31,364 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 60 transitions, 492 flow [2024-10-11 14:27:31,365 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-10-11 14:27:31,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-10-11 14:27:31,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 58 transitions. [2024-10-11 14:27:31,365 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4461538461538462 [2024-10-11 14:27:31,366 INFO L175 Difference]: Start difference. First operand has 65 places, 40 transitions, 300 flow. Second operand 5 states and 58 transitions. [2024-10-11 14:27:31,366 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 60 transitions, 492 flow [2024-10-11 14:27:31,370 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 60 transitions, 448 flow, removed 3 selfloop flow, removed 8 redundant places. [2024-10-11 14:27:31,371 INFO L231 Difference]: Finished difference. Result has 60 places, 42 transitions, 309 flow [2024-10-11 14:27:31,372 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=26, PETRI_DIFFERENCE_MINUEND_FLOW=260, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=309, PETRI_PLACES=60, PETRI_TRANSITIONS=42} [2024-10-11 14:27:31,372 INFO L277 CegarLoopForPetriNet]: 25 programPoint places, 35 predicate places. [2024-10-11 14:27:31,372 INFO L471 AbstractCegarLoop]: Abstraction has has 60 places, 42 transitions, 309 flow [2024-10-11 14:27:31,372 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 7.0) internal successors, (35), 5 states have internal predecessors, (35), 0 states have call successors, (0), 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 14:27:31,373 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 14:27:31,373 INFO L204 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 14:27:31,373 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-10-11 14:27:31,373 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 14:27:31,374 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 14:27:31,374 INFO L85 PathProgramCache]: Analyzing trace with hash -1066661762, now seen corresponding path program 3 times [2024-10-11 14:27:31,374 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 14:27:31,374 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [951815919] [2024-10-11 14:27:31,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 14:27:31,374 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 14:27:31,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 14:27:31,483 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-10-11 14:27:31,484 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 14:27:31,484 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [951815919] [2024-10-11 14:27:31,484 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [951815919] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-11 14:27:31,484 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-11 14:27:31,484 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-10-11 14:27:31,484 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [494642712] [2024-10-11 14:27:31,485 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-11 14:27:31,485 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-10-11 14:27:31,485 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 14:27:31,485 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-10-11 14:27:31,486 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-10-11 14:27:31,486 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 26 [2024-10-11 14:27:31,486 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 42 transitions, 309 flow. Second operand has 5 states, 5 states have (on average 7.0) internal successors, (35), 5 states have internal predecessors, (35), 0 states have call successors, (0), 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 14:27:31,486 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 14:27:31,486 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 26 [2024-10-11 14:27:31,486 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 14:27:31,685 INFO L124 PetriNetUnfolderBase]: 437/749 cut-off events. [2024-10-11 14:27:31,685 INFO L125 PetriNetUnfolderBase]: For 1910/1910 co-relation queries the response was YES. [2024-10-11 14:27:31,687 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2352 conditions, 749 events. 437/749 cut-off events. For 1910/1910 co-relation queries the response was YES. Maximal size of possible extension queue 50. Compared 3152 event pairs, 184 based on Foata normal form. 8/757 useless extension candidates. Maximal degree in co-relation 2331. Up to 355 conditions per place. [2024-10-11 14:27:31,691 INFO L140 encePairwiseOnDemand]: 21/26 looper letters, 44 selfloop transitions, 13 changer transitions 5/63 dead transitions. [2024-10-11 14:27:31,691 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 63 transitions, 498 flow [2024-10-11 14:27:31,691 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-10-11 14:27:31,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-10-11 14:27:31,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 61 transitions. [2024-10-11 14:27:31,692 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.46923076923076923 [2024-10-11 14:27:31,692 INFO L175 Difference]: Start difference. First operand has 60 places, 42 transitions, 309 flow. Second operand 5 states and 61 transitions. [2024-10-11 14:27:31,692 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 63 transitions, 498 flow [2024-10-11 14:27:31,696 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 62 places, 63 transitions, 486 flow, removed 1 selfloop flow, removed 1 redundant places. [2024-10-11 14:27:31,697 INFO L231 Difference]: Finished difference. Result has 63 places, 42 transitions, 329 flow [2024-10-11 14:27:31,698 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=26, PETRI_DIFFERENCE_MINUEND_FLOW=297, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=329, PETRI_PLACES=63, PETRI_TRANSITIONS=42} [2024-10-11 14:27:31,698 INFO L277 CegarLoopForPetriNet]: 25 programPoint places, 38 predicate places. [2024-10-11 14:27:31,698 INFO L471 AbstractCegarLoop]: Abstraction has has 63 places, 42 transitions, 329 flow [2024-10-11 14:27:31,699 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 7.0) internal successors, (35), 5 states have internal predecessors, (35), 0 states have call successors, (0), 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 14:27:31,699 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 14:27:31,699 INFO L204 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 14:27:31,699 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-10-11 14:27:31,699 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 14:27:31,700 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 14:27:31,700 INFO L85 PathProgramCache]: Analyzing trace with hash -1458736781, now seen corresponding path program 1 times [2024-10-11 14:27:31,700 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 14:27:31,700 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1596978460] [2024-10-11 14:27:31,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 14:27:31,700 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 14:27:31,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 14:27:32,721 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-10-11 14:27:32,721 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 14:27:32,721 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1596978460] [2024-10-11 14:27:32,722 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1596978460] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-11 14:27:32,722 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1296403125] [2024-10-11 14:27:32,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 14:27:32,722 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 14:27:32,722 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 14:27:32,724 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 14:27:32,726 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 14:27:32,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 14:27:32,830 INFO L255 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 26 conjuncts are in the unsatisfiable core [2024-10-11 14:27:32,834 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 14:27:33,410 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 182 treesize of output 118 [2024-10-11 14:27:33,634 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-10-11 14:27:33,634 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-11 14:27:35,593 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-11 14:27:35,594 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 237 treesize of output 149 [2024-10-11 14:27:35,856 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-10-11 14:27:35,857 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1296403125] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-11 14:27:35,857 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-11 14:27:35,857 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 21 [2024-10-11 14:27:35,857 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [760886803] [2024-10-11 14:27:35,857 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-11 14:27:35,858 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-10-11 14:27:35,861 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 14:27:35,862 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-10-11 14:27:35,862 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=351, Unknown=0, NotChecked=0, Total=420 [2024-10-11 14:27:35,863 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 26 [2024-10-11 14:27:35,863 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 42 transitions, 329 flow. Second operand has 21 states, 21 states have (on average 5.857142857142857) internal successors, (123), 21 states have internal predecessors, (123), 0 states have call successors, (0), 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 14:27:35,863 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 14:27:35,863 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 26 [2024-10-11 14:27:35,863 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 14:27:39,804 INFO L124 PetriNetUnfolderBase]: 1130/1982 cut-off events. [2024-10-11 14:27:39,804 INFO L125 PetriNetUnfolderBase]: For 3514/3514 co-relation queries the response was YES. [2024-10-11 14:27:39,809 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5683 conditions, 1982 events. 1130/1982 cut-off events. For 3514/3514 co-relation queries the response was YES. Maximal size of possible extension queue 100. Compared 10468 event pairs, 169 based on Foata normal form. 9/1991 useless extension candidates. Maximal degree in co-relation 5661. Up to 351 conditions per place. [2024-10-11 14:27:39,817 INFO L140 encePairwiseOnDemand]: 17/26 looper letters, 187 selfloop transitions, 55 changer transitions 35/278 dead transitions. [2024-10-11 14:27:39,817 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 94 places, 278 transitions, 1757 flow [2024-10-11 14:27:39,818 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2024-10-11 14:27:39,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2024-10-11 14:27:39,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 351 transitions. [2024-10-11 14:27:39,821 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4090909090909091 [2024-10-11 14:27:39,822 INFO L175 Difference]: Start difference. First operand has 63 places, 42 transitions, 329 flow. Second operand 33 states and 351 transitions. [2024-10-11 14:27:39,822 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 94 places, 278 transitions, 1757 flow [2024-10-11 14:27:39,831 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 88 places, 278 transitions, 1669 flow, removed 3 selfloop flow, removed 6 redundant places. [2024-10-11 14:27:39,836 INFO L231 Difference]: Finished difference. Result has 100 places, 94 transitions, 785 flow [2024-10-11 14:27:39,837 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=26, PETRI_DIFFERENCE_MINUEND_FLOW=287, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=33, PETRI_FLOW=785, PETRI_PLACES=100, PETRI_TRANSITIONS=94} [2024-10-11 14:27:39,837 INFO L277 CegarLoopForPetriNet]: 25 programPoint places, 75 predicate places. [2024-10-11 14:27:39,837 INFO L471 AbstractCegarLoop]: Abstraction has has 100 places, 94 transitions, 785 flow [2024-10-11 14:27:39,838 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 5.857142857142857) internal successors, (123), 21 states have internal predecessors, (123), 0 states have call successors, (0), 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 14:27:39,838 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 14:27:39,838 INFO L204 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 14:27:39,853 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2024-10-11 14:27:40,042 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2024-10-11 14:27:40,042 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 14:27:40,043 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 14:27:40,043 INFO L85 PathProgramCache]: Analyzing trace with hash 1451639513, now seen corresponding path program 2 times [2024-10-11 14:27:40,043 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 14:27:40,043 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2085711596] [2024-10-11 14:27:40,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 14:27:40,044 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 14:27:40,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 14:27:41,035 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-10-11 14:27:41,036 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 14:27:41,036 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2085711596] [2024-10-11 14:27:41,036 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2085711596] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-11 14:27:41,036 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1332351774] [2024-10-11 14:27:41,036 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-11 14:27:41,037 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 14:27:41,037 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 14:27:41,038 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 14:27:41,040 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 14:27:41,144 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-11 14:27:41,145 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-11 14:27:41,146 INFO L255 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 31 conjuncts are in the unsatisfiable core [2024-10-11 14:27:41,150 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 14:27:41,628 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 78 treesize of output 50 [2024-10-11 14:27:41,734 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-10-11 14:27:41,734 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-11 14:27:42,837 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-11 14:27:42,838 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 298 treesize of output 178 [2024-10-11 14:27:43,181 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-10-11 14:27:43,182 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1332351774] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-11 14:27:43,182 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-11 14:27:43,182 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 8] total 22 [2024-10-11 14:27:43,182 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1087104441] [2024-10-11 14:27:43,182 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-11 14:27:43,183 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2024-10-11 14:27:43,183 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 14:27:43,184 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2024-10-11 14:27:43,184 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=392, Unknown=0, NotChecked=0, Total=462 [2024-10-11 14:27:43,184 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 26 [2024-10-11 14:27:43,185 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 100 places, 94 transitions, 785 flow. Second operand has 22 states, 22 states have (on average 5.545454545454546) internal successors, (122), 22 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 14:27:43,185 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 14:27:43,185 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 26 [2024-10-11 14:27:43,185 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 14:27:44,528 INFO L124 PetriNetUnfolderBase]: 1259/2213 cut-off events. [2024-10-11 14:27:44,529 INFO L125 PetriNetUnfolderBase]: For 6431/6431 co-relation queries the response was YES. [2024-10-11 14:27:44,537 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7376 conditions, 2213 events. 1259/2213 cut-off events. For 6431/6431 co-relation queries the response was YES. Maximal size of possible extension queue 123. Compared 12084 event pairs, 616 based on Foata normal form. 1/2214 useless extension candidates. Maximal degree in co-relation 7344. Up to 1484 conditions per place. [2024-10-11 14:27:44,546 INFO L140 encePairwiseOnDemand]: 15/26 looper letters, 129 selfloop transitions, 47 changer transitions 13/190 dead transitions. [2024-10-11 14:27:44,546 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 111 places, 190 transitions, 1651 flow [2024-10-11 14:27:44,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-10-11 14:27:44,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2024-10-11 14:27:44,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 158 transitions. [2024-10-11 14:27:44,548 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.3798076923076923 [2024-10-11 14:27:44,548 INFO L175 Difference]: Start difference. First operand has 100 places, 94 transitions, 785 flow. Second operand 16 states and 158 transitions. [2024-10-11 14:27:44,548 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 111 places, 190 transitions, 1651 flow [2024-10-11 14:27:44,570 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 103 places, 190 transitions, 1472 flow, removed 71 selfloop flow, removed 8 redundant places. [2024-10-11 14:27:44,573 INFO L231 Difference]: Finished difference. Result has 109 places, 125 transitions, 1091 flow [2024-10-11 14:27:44,574 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=26, PETRI_DIFFERENCE_MINUEND_FLOW=682, PETRI_DIFFERENCE_MINUEND_PLACES=88, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=94, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=66, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=1091, PETRI_PLACES=109, PETRI_TRANSITIONS=125} [2024-10-11 14:27:44,575 INFO L277 CegarLoopForPetriNet]: 25 programPoint places, 84 predicate places. [2024-10-11 14:27:44,576 INFO L471 AbstractCegarLoop]: Abstraction has has 109 places, 125 transitions, 1091 flow [2024-10-11 14:27:44,576 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 5.545454545454546) internal successors, (122), 22 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 14:27:44,576 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 14:27:44,576 INFO L204 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 14:27:44,594 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-10-11 14:27:44,777 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,SelfDestructingSolverStorable14 [2024-10-11 14:27:44,778 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 14:27:44,778 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 14:27:44,779 INFO L85 PathProgramCache]: Analyzing trace with hash -1197780077, now seen corresponding path program 3 times [2024-10-11 14:27:44,780 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 14:27:44,780 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [214157987] [2024-10-11 14:27:44,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 14:27:44,780 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 14:27:44,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 14:27:45,696 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-10-11 14:27:45,697 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 14:27:45,697 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [214157987] [2024-10-11 14:27:45,697 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [214157987] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-11 14:27:45,697 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1920883595] [2024-10-11 14:27:45,697 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-10-11 14:27:45,698 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 14:27:45,698 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 14:27:45,699 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 14:27:45,701 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 14:27:45,802 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-10-11 14:27:45,802 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-11 14:27:45,807 INFO L255 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 34 conjuncts are in the unsatisfiable core [2024-10-11 14:27:45,814 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 14:27:46,002 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 158 treesize of output 102 [2024-10-11 14:27:46,278 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-10-11 14:27:46,279 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-11 14:27:47,923 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-11 14:27:47,923 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 207 treesize of output 143 [2024-10-11 14:27:48,179 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-10-11 14:27:48,179 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1920883595] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-11 14:27:48,179 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-11 14:27:48,179 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 9] total 23 [2024-10-11 14:27:48,180 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1916635738] [2024-10-11 14:27:48,180 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-11 14:27:48,180 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2024-10-11 14:27:48,180 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 14:27:48,181 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2024-10-11 14:27:48,181 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=428, Unknown=0, NotChecked=0, Total=506 [2024-10-11 14:27:48,182 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 26 [2024-10-11 14:27:48,182 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 109 places, 125 transitions, 1091 flow. Second operand has 23 states, 23 states have (on average 5.478260869565218) internal successors, (126), 23 states have internal predecessors, (126), 0 states have call successors, (0), 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 14:27:48,182 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 14:27:48,182 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 26 [2024-10-11 14:27:48,182 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 14:27:49,921 INFO L124 PetriNetUnfolderBase]: 1359/2417 cut-off events. [2024-10-11 14:27:49,922 INFO L125 PetriNetUnfolderBase]: For 8803/8803 co-relation queries the response was YES. [2024-10-11 14:27:49,933 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8485 conditions, 2417 events. 1359/2417 cut-off events. For 8803/8803 co-relation queries the response was YES. Maximal size of possible extension queue 134. Compared 13564 event pairs, 513 based on Foata normal form. 2/2419 useless extension candidates. Maximal degree in co-relation 8453. Up to 1148 conditions per place. [2024-10-11 14:27:49,946 INFO L140 encePairwiseOnDemand]: 15/26 looper letters, 139 selfloop transitions, 75 changer transitions 20/235 dead transitions. [2024-10-11 14:27:49,946 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 131 places, 235 transitions, 2073 flow [2024-10-11 14:27:49,946 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2024-10-11 14:27:49,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2024-10-11 14:27:49,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 209 transitions. [2024-10-11 14:27:49,949 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.3494983277591973 [2024-10-11 14:27:49,949 INFO L175 Difference]: Start difference. First operand has 109 places, 125 transitions, 1091 flow. Second operand 23 states and 209 transitions. [2024-10-11 14:27:49,949 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 131 places, 235 transitions, 2073 flow [2024-10-11 14:27:49,992 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 126 places, 235 transitions, 1926 flow, removed 53 selfloop flow, removed 5 redundant places. [2024-10-11 14:27:49,996 INFO L231 Difference]: Finished difference. Result has 140 places, 156 transitions, 1444 flow [2024-10-11 14:27:49,997 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=26, PETRI_DIFFERENCE_MINUEND_FLOW=944, PETRI_DIFFERENCE_MINUEND_PLACES=104, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=125, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=1444, PETRI_PLACES=140, PETRI_TRANSITIONS=156} [2024-10-11 14:27:49,997 INFO L277 CegarLoopForPetriNet]: 25 programPoint places, 115 predicate places. [2024-10-11 14:27:49,997 INFO L471 AbstractCegarLoop]: Abstraction has has 140 places, 156 transitions, 1444 flow [2024-10-11 14:27:49,998 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 5.478260869565218) internal successors, (126), 23 states have internal predecessors, (126), 0 states have call successors, (0), 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 14:27:49,998 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 14:27:49,998 INFO L204 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 14:27:50,012 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2024-10-11 14:27:50,199 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,8 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 14:27:50,200 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 14:27:50,200 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 14:27:50,200 INFO L85 PathProgramCache]: Analyzing trace with hash 722250533, now seen corresponding path program 4 times [2024-10-11 14:27:50,201 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 14:27:50,201 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1246855598] [2024-10-11 14:27:50,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 14:27:50,201 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 14:27:50,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 14:27:51,021 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-10-11 14:27:51,021 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 14:27:51,021 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1246855598] [2024-10-11 14:27:51,021 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1246855598] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-11 14:27:51,021 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1285595133] [2024-10-11 14:27:51,021 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-10-11 14:27:51,022 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 14:27:51,022 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 14:27:51,024 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 14:27:51,026 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 14:27:51,128 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-10-11 14:27:51,128 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-11 14:27:51,130 INFO L255 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 34 conjuncts are in the unsatisfiable core [2024-10-11 14:27:51,133 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 14:27:51,475 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 182 treesize of output 118 [2024-10-11 14:27:51,726 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-10-11 14:27:51,726 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-11 14:27:53,139 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-11 14:27:53,140 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 421 treesize of output 261 [2024-10-11 14:27:53,736 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-10-11 14:27:53,736 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1285595133] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-11 14:27:53,736 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-11 14:27:53,736 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 8] total 21 [2024-10-11 14:27:53,737 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1248647074] [2024-10-11 14:27:53,737 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-11 14:27:53,738 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-10-11 14:27:53,739 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 14:27:53,739 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-10-11 14:27:53,740 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=345, Unknown=0, NotChecked=0, Total=420 [2024-10-11 14:27:53,740 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 26 [2024-10-11 14:27:53,740 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 140 places, 156 transitions, 1444 flow. Second operand has 21 states, 21 states have (on average 5.714285714285714) internal successors, (120), 21 states have internal predecessors, (120), 0 states have call successors, (0), 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 14:27:53,740 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 14:27:53,740 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 26 [2024-10-11 14:27:53,741 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 14:27:56,052 INFO L124 PetriNetUnfolderBase]: 1628/2959 cut-off events. [2024-10-11 14:27:56,052 INFO L125 PetriNetUnfolderBase]: For 20793/20793 co-relation queries the response was YES. [2024-10-11 14:27:56,067 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13904 conditions, 2959 events. 1628/2959 cut-off events. For 20793/20793 co-relation queries the response was YES. Maximal size of possible extension queue 162. Compared 17736 event pairs, 533 based on Foata normal form. 9/2968 useless extension candidates. Maximal degree in co-relation 13858. Up to 1188 conditions per place. [2024-10-11 14:27:56,083 INFO L140 encePairwiseOnDemand]: 17/26 looper letters, 160 selfloop transitions, 103 changer transitions 23/287 dead transitions. [2024-10-11 14:27:56,083 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 160 places, 287 transitions, 3027 flow [2024-10-11 14:27:56,084 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2024-10-11 14:27:56,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2024-10-11 14:27:56,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 230 transitions. [2024-10-11 14:27:56,085 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4020979020979021 [2024-10-11 14:27:56,086 INFO L175 Difference]: Start difference. First operand has 140 places, 156 transitions, 1444 flow. Second operand 22 states and 230 transitions. [2024-10-11 14:27:56,086 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 160 places, 287 transitions, 3027 flow [2024-10-11 14:27:56,181 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 152 places, 287 transitions, 2896 flow, removed 45 selfloop flow, removed 8 redundant places. [2024-10-11 14:27:56,185 INFO L231 Difference]: Finished difference. Result has 160 places, 185 transitions, 1953 flow [2024-10-11 14:27:56,186 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=26, PETRI_DIFFERENCE_MINUEND_FLOW=1340, PETRI_DIFFERENCE_MINUEND_PLACES=131, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=156, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=76, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=69, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=1953, PETRI_PLACES=160, PETRI_TRANSITIONS=185} [2024-10-11 14:27:56,186 INFO L277 CegarLoopForPetriNet]: 25 programPoint places, 135 predicate places. [2024-10-11 14:27:56,186 INFO L471 AbstractCegarLoop]: Abstraction has has 160 places, 185 transitions, 1953 flow [2024-10-11 14:27:56,187 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 5.714285714285714) internal successors, (120), 21 states have internal predecessors, (120), 0 states have call successors, (0), 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 14:27:56,187 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 14:27:56,187 INFO L204 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 14:27:56,204 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 14:27:56,387 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2024-10-11 14:27:56,388 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 14:27:56,388 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 14:27:56,388 INFO L85 PathProgramCache]: Analyzing trace with hash 1526143479, now seen corresponding path program 5 times [2024-10-11 14:27:56,388 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 14:27:56,388 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [701261242] [2024-10-11 14:27:56,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 14:27:56,388 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 14:27:56,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 14:27:57,188 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-10-11 14:27:57,188 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 14:27:57,189 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [701261242] [2024-10-11 14:27:57,189 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [701261242] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-11 14:27:57,189 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [534618578] [2024-10-11 14:27:57,189 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-10-11 14:27:57,189 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 14:27:57,189 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 14:27:57,191 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 14:27:57,193 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 14:27:57,295 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2024-10-11 14:27:57,295 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-11 14:27:57,299 INFO L255 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 27 conjuncts are in the unsatisfiable core [2024-10-11 14:27:57,301 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 14:27:57,584 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 158 treesize of output 102 [2024-10-11 14:27:57,751 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-10-11 14:27:57,751 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-11 14:27:59,136 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-11 14:27:59,137 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 193 treesize of output 137 [2024-10-11 14:27:59,566 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-10-11 14:27:59,566 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [534618578] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-11 14:27:59,567 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-11 14:27:59,567 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 23 [2024-10-11 14:27:59,567 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1866088026] [2024-10-11 14:27:59,567 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-11 14:27:59,568 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2024-10-11 14:27:59,568 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 14:27:59,568 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2024-10-11 14:27:59,569 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=430, Unknown=0, NotChecked=0, Total=506 [2024-10-11 14:27:59,569 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 26 [2024-10-11 14:27:59,569 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 160 places, 185 transitions, 1953 flow. Second operand has 23 states, 23 states have (on average 5.434782608695652) internal successors, (125), 23 states have internal predecessors, (125), 0 states have call successors, (0), 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 14:27:59,569 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 14:27:59,569 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 26 [2024-10-11 14:27:59,569 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 14:28:00,855 INFO L124 PetriNetUnfolderBase]: 1677/3063 cut-off events. [2024-10-11 14:28:00,855 INFO L125 PetriNetUnfolderBase]: For 27324/27324 co-relation queries the response was YES. [2024-10-11 14:28:00,874 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15406 conditions, 3063 events. 1677/3063 cut-off events. For 27324/27324 co-relation queries the response was YES. Maximal size of possible extension queue 167. Compared 18653 event pairs, 746 based on Foata normal form. 2/3065 useless extension candidates. Maximal degree in co-relation 15354. Up to 1602 conditions per place. [2024-10-11 14:28:00,887 INFO L140 encePairwiseOnDemand]: 16/26 looper letters, 186 selfloop transitions, 85 changer transitions 11/283 dead transitions. [2024-10-11 14:28:00,887 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 172 places, 283 transitions, 3306 flow [2024-10-11 14:28:00,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-10-11 14:28:00,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2024-10-11 14:28:00,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 142 transitions. [2024-10-11 14:28:00,889 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.3901098901098901 [2024-10-11 14:28:00,889 INFO L175 Difference]: Start difference. First operand has 160 places, 185 transitions, 1953 flow. Second operand 14 states and 142 transitions. [2024-10-11 14:28:00,889 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 172 places, 283 transitions, 3306 flow [2024-10-11 14:28:01,003 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 164 places, 283 transitions, 3151 flow, removed 66 selfloop flow, removed 8 redundant places. [2024-10-11 14:28:01,006 INFO L231 Difference]: Finished difference. Result has 171 places, 205 transitions, 2330 flow [2024-10-11 14:28:01,007 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=26, PETRI_DIFFERENCE_MINUEND_FLOW=1836, PETRI_DIFFERENCE_MINUEND_PLACES=151, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=185, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=66, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=110, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=2330, PETRI_PLACES=171, PETRI_TRANSITIONS=205} [2024-10-11 14:28:01,007 INFO L277 CegarLoopForPetriNet]: 25 programPoint places, 146 predicate places. [2024-10-11 14:28:01,007 INFO L471 AbstractCegarLoop]: Abstraction has has 171 places, 205 transitions, 2330 flow [2024-10-11 14:28:01,008 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 5.434782608695652) internal successors, (125), 23 states have internal predecessors, (125), 0 states have call successors, (0), 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 14:28:01,008 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 14:28:01,008 INFO L204 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 14:28:01,020 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 14:28:01,208 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2024-10-11 14:28:01,209 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 14:28:01,209 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 14:28:01,209 INFO L85 PathProgramCache]: Analyzing trace with hash -700196031, now seen corresponding path program 6 times [2024-10-11 14:28:01,209 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 14:28:01,209 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [709315851] [2024-10-11 14:28:01,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 14:28:01,209 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 14:28:01,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 14:28:01,976 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-10-11 14:28:01,976 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 14:28:01,976 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [709315851] [2024-10-11 14:28:01,976 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [709315851] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-11 14:28:01,976 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [167643418] [2024-10-11 14:28:01,976 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-10-11 14:28:01,976 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 14:28:01,976 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 14:28:01,979 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 14:28:01,980 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 14:28:02,086 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2024-10-11 14:28:02,086 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-11 14:28:02,092 INFO L255 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 35 conjuncts are in the unsatisfiable core [2024-10-11 14:28:02,095 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 14:28:02,424 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 138 treesize of output 90 [2024-10-11 14:28:02,553 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-10-11 14:28:02,553 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-11 14:28:03,832 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-11 14:28:03,833 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 223 treesize of output 151 [2024-10-11 14:28:04,147 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-10-11 14:28:04,148 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [167643418] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-11 14:28:04,148 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-11 14:28:04,148 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10, 9] total 22 [2024-10-11 14:28:04,148 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [172487557] [2024-10-11 14:28:04,148 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-11 14:28:04,151 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2024-10-11 14:28:04,152 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 14:28:04,152 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2024-10-11 14:28:04,153 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=378, Unknown=0, NotChecked=0, Total=462 [2024-10-11 14:28:04,154 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 26 [2024-10-11 14:28:04,154 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 171 places, 205 transitions, 2330 flow. Second operand has 22 states, 22 states have (on average 5.5) internal successors, (121), 22 states have internal predecessors, (121), 0 states have call successors, (0), 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 14:28:04,154 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 14:28:04,154 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 26 [2024-10-11 14:28:04,154 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 14:28:05,758 INFO L124 PetriNetUnfolderBase]: 1836/3377 cut-off events. [2024-10-11 14:28:05,758 INFO L125 PetriNetUnfolderBase]: For 34692/34692 co-relation queries the response was YES. [2024-10-11 14:28:05,776 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17949 conditions, 3377 events. 1836/3377 cut-off events. For 34692/34692 co-relation queries the response was YES. Maximal size of possible extension queue 195. Compared 21277 event pairs, 583 based on Foata normal form. 2/3379 useless extension candidates. Maximal degree in co-relation 17892. Up to 1319 conditions per place. [2024-10-11 14:28:05,793 INFO L140 encePairwiseOnDemand]: 15/26 looper letters, 153 selfloop transitions, 152 changer transitions 20/326 dead transitions. [2024-10-11 14:28:05,793 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 192 places, 326 transitions, 4107 flow [2024-10-11 14:28:05,794 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2024-10-11 14:28:05,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2024-10-11 14:28:05,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 195 transitions. [2024-10-11 14:28:05,795 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.3409090909090909 [2024-10-11 14:28:05,795 INFO L175 Difference]: Start difference. First operand has 171 places, 205 transitions, 2330 flow. Second operand 22 states and 195 transitions. [2024-10-11 14:28:05,795 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 192 places, 326 transitions, 4107 flow [2024-10-11 14:28:05,989 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 188 places, 326 transitions, 3963 flow, removed 49 selfloop flow, removed 4 redundant places. [2024-10-11 14:28:05,994 INFO L231 Difference]: Finished difference. Result has 194 places, 246 transitions, 3151 flow [2024-10-11 14:28:05,994 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=26, PETRI_DIFFERENCE_MINUEND_FLOW=2233, PETRI_DIFFERENCE_MINUEND_PLACES=167, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=205, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=113, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=84, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=3151, PETRI_PLACES=194, PETRI_TRANSITIONS=246} [2024-10-11 14:28:05,994 INFO L277 CegarLoopForPetriNet]: 25 programPoint places, 169 predicate places. [2024-10-11 14:28:05,994 INFO L471 AbstractCegarLoop]: Abstraction has has 194 places, 246 transitions, 3151 flow [2024-10-11 14:28:05,995 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 5.5) internal successors, (121), 22 states have internal predecessors, (121), 0 states have call successors, (0), 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 14:28:05,995 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 14:28:05,995 INFO L204 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 14:28:06,008 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2024-10-11 14:28:06,195 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,11 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 14:28:06,196 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 14:28:06,196 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 14:28:06,196 INFO L85 PathProgramCache]: Analyzing trace with hash 1261059467, now seen corresponding path program 7 times [2024-10-11 14:28:06,196 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 14:28:06,196 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1577900518] [2024-10-11 14:28:06,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 14:28:06,196 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 14:28:06,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 14:28:06,999 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-10-11 14:28:06,999 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 14:28:06,999 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1577900518] [2024-10-11 14:28:06,999 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1577900518] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-11 14:28:06,999 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [386512806] [2024-10-11 14:28:06,999 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-10-11 14:28:06,999 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 14:28:06,999 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 14:28:07,000 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 14:28:07,001 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 14:28:07,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 14:28:07,103 INFO L255 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 27 conjuncts are in the unsatisfiable core [2024-10-11 14:28:07,105 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 14:28:07,387 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 203 treesize of output 131 [2024-10-11 14:28:07,566 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-10-11 14:28:07,566 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-11 14:28:08,900 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-11 14:28:08,901 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 259 treesize of output 159 [2024-10-11 14:28:09,088 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-10-11 14:28:09,089 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [386512806] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-11 14:28:09,089 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-11 14:28:09,089 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 21 [2024-10-11 14:28:09,089 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [660475523] [2024-10-11 14:28:09,089 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-11 14:28:09,090 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-10-11 14:28:09,090 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 14:28:09,090 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-10-11 14:28:09,091 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=353, Unknown=0, NotChecked=0, Total=420 [2024-10-11 14:28:09,091 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 26 [2024-10-11 14:28:09,091 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 194 places, 246 transitions, 3151 flow. Second operand has 21 states, 21 states have (on average 5.714285714285714) internal successors, (120), 21 states have internal predecessors, (120), 0 states have call successors, (0), 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 14:28:09,091 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 14:28:09,091 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 26 [2024-10-11 14:28:09,091 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 14:28:12,795 INFO L124 PetriNetUnfolderBase]: 2517/4766 cut-off events. [2024-10-11 14:28:12,795 INFO L125 PetriNetUnfolderBase]: For 65179/65179 co-relation queries the response was YES. [2024-10-11 14:28:12,823 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27577 conditions, 4766 events. 2517/4766 cut-off events. For 65179/65179 co-relation queries the response was YES. Maximal size of possible extension queue 236. Compared 32202 event pairs, 600 based on Foata normal form. 11/4777 useless extension candidates. Maximal degree in co-relation 27514. Up to 899 conditions per place. [2024-10-11 14:28:12,842 INFO L140 encePairwiseOnDemand]: 17/26 looper letters, 287 selfloop transitions, 161 changer transitions 39/488 dead transitions. [2024-10-11 14:28:12,842 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 223 places, 488 transitions, 6736 flow [2024-10-11 14:28:12,843 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2024-10-11 14:28:12,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2024-10-11 14:28:12,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 304 transitions. [2024-10-11 14:28:12,844 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.3771712158808933 [2024-10-11 14:28:12,844 INFO L175 Difference]: Start difference. First operand has 194 places, 246 transitions, 3151 flow. Second operand 31 states and 304 transitions. [2024-10-11 14:28:12,844 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 223 places, 488 transitions, 6736 flow [2024-10-11 14:28:13,244 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 219 places, 488 transitions, 6355 flow, removed 187 selfloop flow, removed 4 redundant places. [2024-10-11 14:28:13,249 INFO L231 Difference]: Finished difference. Result has 232 places, 312 transitions, 4436 flow [2024-10-11 14:28:13,249 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=26, PETRI_DIFFERENCE_MINUEND_FLOW=2986, PETRI_DIFFERENCE_MINUEND_PLACES=189, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=246, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=109, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=119, PETRI_DIFFERENCE_SUBTRAHEND_STATES=31, PETRI_FLOW=4436, PETRI_PLACES=232, PETRI_TRANSITIONS=312} [2024-10-11 14:28:13,250 INFO L277 CegarLoopForPetriNet]: 25 programPoint places, 207 predicate places. [2024-10-11 14:28:13,250 INFO L471 AbstractCegarLoop]: Abstraction has has 232 places, 312 transitions, 4436 flow [2024-10-11 14:28:13,250 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 5.714285714285714) internal successors, (120), 21 states have internal predecessors, (120), 0 states have call successors, (0), 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 14:28:13,250 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 14:28:13,250 INFO L204 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 14:28:13,262 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2024-10-11 14:28:13,450 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,12 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 14:28:13,451 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 14:28:13,451 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 14:28:13,451 INFO L85 PathProgramCache]: Analyzing trace with hash -2001931132, now seen corresponding path program 8 times [2024-10-11 14:28:13,451 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 14:28:13,452 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1503703020] [2024-10-11 14:28:13,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 14:28:13,452 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 14:28:13,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 14:28:13,950 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-10-11 14:28:13,950 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 14:28:13,950 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1503703020] [2024-10-11 14:28:13,951 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1503703020] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-11 14:28:13,951 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [647387477] [2024-10-11 14:28:13,951 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-11 14:28:13,951 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 14:28:13,951 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 14:28:13,953 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 14:28:13,954 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 14:28:14,065 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-11 14:28:14,065 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-11 14:28:14,069 INFO L255 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 28 conjuncts are in the unsatisfiable core [2024-10-11 14:28:14,072 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 14:28:14,327 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-10-11 14:28:14,327 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-11 14:28:14,510 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-11 14:28:14,510 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 44 treesize of output 28 [2024-10-11 14:28:14,560 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-10-11 14:28:14,561 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [647387477] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-11 14:28:14,561 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-11 14:28:14,561 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 8] total 19 [2024-10-11 14:28:14,561 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [641289752] [2024-10-11 14:28:14,561 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-11 14:28:14,562 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-10-11 14:28:14,562 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 14:28:14,562 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-10-11 14:28:14,562 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=271, Unknown=0, NotChecked=0, Total=342 [2024-10-11 14:28:14,563 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 26 [2024-10-11 14:28:14,563 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 232 places, 312 transitions, 4436 flow. Second operand has 19 states, 19 states have (on average 5.894736842105263) internal successors, (112), 19 states have internal predecessors, (112), 0 states have call successors, (0), 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 14:28:14,563 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 14:28:14,563 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 26 [2024-10-11 14:28:14,563 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 14:28:15,909 INFO L124 PetriNetUnfolderBase]: 2610/4907 cut-off events. [2024-10-11 14:28:15,910 INFO L125 PetriNetUnfolderBase]: For 58406/58406 co-relation queries the response was YES. [2024-10-11 14:28:15,936 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28459 conditions, 4907 events. 2610/4907 cut-off events. For 58406/58406 co-relation queries the response was YES. Maximal size of possible extension queue 249. Compared 33381 event pairs, 483 based on Foata normal form. 27/4934 useless extension candidates. Maximal degree in co-relation 28384. Up to 1262 conditions per place. [2024-10-11 14:28:15,954 INFO L140 encePairwiseOnDemand]: 16/26 looper letters, 266 selfloop transitions, 157 changer transitions 8/432 dead transitions. [2024-10-11 14:28:15,954 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 248 places, 432 transitions, 6525 flow [2024-10-11 14:28:15,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2024-10-11 14:28:15,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2024-10-11 14:28:15,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 195 transitions. [2024-10-11 14:28:15,956 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.35714285714285715 [2024-10-11 14:28:15,956 INFO L175 Difference]: Start difference. First operand has 232 places, 312 transitions, 4436 flow. Second operand 21 states and 195 transitions. [2024-10-11 14:28:15,956 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 248 places, 432 transitions, 6525 flow [2024-10-11 14:28:16,358 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 240 places, 432 transitions, 6057 flow, removed 176 selfloop flow, removed 8 redundant places. [2024-10-11 14:28:16,363 INFO L231 Difference]: Finished difference. Result has 252 places, 338 transitions, 4858 flow [2024-10-11 14:28:16,364 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=26, PETRI_DIFFERENCE_MINUEND_FLOW=4080, PETRI_DIFFERENCE_MINUEND_PLACES=220, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=312, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=131, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=174, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=4858, PETRI_PLACES=252, PETRI_TRANSITIONS=338} [2024-10-11 14:28:16,364 INFO L277 CegarLoopForPetriNet]: 25 programPoint places, 227 predicate places. [2024-10-11 14:28:16,365 INFO L471 AbstractCegarLoop]: Abstraction has has 252 places, 338 transitions, 4858 flow [2024-10-11 14:28:16,365 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 5.894736842105263) internal successors, (112), 19 states have internal predecessors, (112), 0 states have call successors, (0), 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 14:28:16,365 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 14:28:16,365 INFO L204 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 14:28:16,383 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 14:28:16,565 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,13 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 14:28:16,566 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 14:28:16,566 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 14:28:16,566 INFO L85 PathProgramCache]: Analyzing trace with hash -99982560, now seen corresponding path program 9 times [2024-10-11 14:28:16,566 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 14:28:16,566 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2107303560] [2024-10-11 14:28:16,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 14:28:16,566 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 14:28:16,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 14:28:17,053 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-10-11 14:28:17,054 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 14:28:17,054 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2107303560] [2024-10-11 14:28:17,054 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2107303560] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-11 14:28:17,054 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [248743418] [2024-10-11 14:28:17,054 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-10-11 14:28:17,054 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 14:28:17,054 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 14:28:17,055 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 14:28:17,056 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 14:28:17,155 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-10-11 14:28:17,156 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-11 14:28:17,157 INFO L255 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 44 conjuncts are in the unsatisfiable core [2024-10-11 14:28:17,159 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 14:28:17,180 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-10-11 14:28:17,197 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2024-10-11 14:28:17,212 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2024-10-11 14:28:17,392 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 91 treesize of output 59 [2024-10-11 14:28:17,458 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-11 14:28:17,458 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-11 14:28:17,647 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-10-11 14:28:17,647 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [248743418] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-11 14:28:17,647 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-11 14:28:17,647 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11, 8] total 24 [2024-10-11 14:28:17,647 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [984443828] [2024-10-11 14:28:17,647 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-11 14:28:17,648 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2024-10-11 14:28:17,648 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 14:28:17,648 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2024-10-11 14:28:17,649 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=466, Unknown=0, NotChecked=0, Total=552 [2024-10-11 14:28:17,649 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 26 [2024-10-11 14:28:17,649 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 252 places, 338 transitions, 4858 flow. Second operand has 24 states, 24 states have (on average 5.583333333333333) internal successors, (134), 24 states have internal predecessors, (134), 0 states have call successors, (0), 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 14:28:17,651 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 14:28:17,651 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 26 [2024-10-11 14:28:17,651 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 14:28:18,937 INFO L124 PetriNetUnfolderBase]: 2494/4677 cut-off events. [2024-10-11 14:28:18,937 INFO L125 PetriNetUnfolderBase]: For 92126/92126 co-relation queries the response was YES. [2024-10-11 14:28:18,972 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31767 conditions, 4677 events. 2494/4677 cut-off events. For 92126/92126 co-relation queries the response was YES. Maximal size of possible extension queue 241. Compared 31514 event pairs, 1111 based on Foata normal form. 24/4701 useless extension candidates. Maximal degree in co-relation 31685. Up to 2445 conditions per place. [2024-10-11 14:28:18,989 INFO L140 encePairwiseOnDemand]: 16/26 looper letters, 293 selfloop transitions, 102 changer transitions 9/405 dead transitions. [2024-10-11 14:28:18,989 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 262 places, 405 transitions, 6382 flow [2024-10-11 14:28:18,990 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-10-11 14:28:18,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2024-10-11 14:28:18,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 142 transitions. [2024-10-11 14:28:18,991 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.3901098901098901 [2024-10-11 14:28:18,991 INFO L175 Difference]: Start difference. First operand has 252 places, 338 transitions, 4858 flow. Second operand 14 states and 142 transitions. [2024-10-11 14:28:18,991 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 262 places, 405 transitions, 6382 flow [2024-10-11 14:28:19,286 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 252 places, 405 transitions, 6120 flow, removed 49 selfloop flow, removed 10 redundant places. [2024-10-11 14:28:19,291 INFO L231 Difference]: Finished difference. Result has 256 places, 346 transitions, 5039 flow [2024-10-11 14:28:19,291 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=26, PETRI_DIFFERENCE_MINUEND_FLOW=4518, PETRI_DIFFERENCE_MINUEND_PLACES=239, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=331, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=87, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=240, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=5039, PETRI_PLACES=256, PETRI_TRANSITIONS=346} [2024-10-11 14:28:19,292 INFO L277 CegarLoopForPetriNet]: 25 programPoint places, 231 predicate places. [2024-10-11 14:28:19,292 INFO L471 AbstractCegarLoop]: Abstraction has has 256 places, 346 transitions, 5039 flow [2024-10-11 14:28:19,292 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 5.583333333333333) internal successors, (134), 24 states have internal predecessors, (134), 0 states have call successors, (0), 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 14:28:19,292 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 14:28:19,292 INFO L204 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 14:28:19,305 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2024-10-11 14:28:19,492 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,14 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 14:28:19,493 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 14:28:19,493 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 14:28:19,493 INFO L85 PathProgramCache]: Analyzing trace with hash -1009560928, now seen corresponding path program 10 times [2024-10-11 14:28:19,493 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 14:28:19,493 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1657787718] [2024-10-11 14:28:19,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 14:28:19,494 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 14:28:19,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 14:28:19,955 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-10-11 14:28:19,956 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 14:28:19,956 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1657787718] [2024-10-11 14:28:19,956 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1657787718] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-11 14:28:19,956 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1725660280] [2024-10-11 14:28:19,956 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-10-11 14:28:19,956 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 14:28:19,956 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 14:28:19,957 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 14:28:19,958 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 14:28:20,054 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-10-11 14:28:20,054 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-11 14:28:20,055 INFO L255 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 31 conjuncts are in the unsatisfiable core [2024-10-11 14:28:20,056 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 14:28:20,237 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 112 treesize of output 72 [2024-10-11 14:28:20,321 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-10-11 14:28:20,321 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-11 14:28:20,530 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-11 14:28:20,531 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 44 treesize of output 28 [2024-10-11 14:28:20,558 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-10-11 14:28:20,558 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1725660280] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-11 14:28:20,558 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-11 14:28:20,558 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 20 [2024-10-11 14:28:20,558 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1410242646] [2024-10-11 14:28:20,558 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-11 14:28:20,559 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-10-11 14:28:20,559 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 14:28:20,559 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-10-11 14:28:20,559 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=306, Unknown=0, NotChecked=0, Total=380 [2024-10-11 14:28:20,559 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 26 [2024-10-11 14:28:20,560 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 256 places, 346 transitions, 5039 flow. Second operand has 20 states, 20 states have (on average 5.85) internal successors, (117), 20 states have internal predecessors, (117), 0 states have call successors, (0), 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 14:28:20,560 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 14:28:20,560 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 26 [2024-10-11 14:28:20,560 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 14:28:22,632 INFO L124 PetriNetUnfolderBase]: 2625/4940 cut-off events. [2024-10-11 14:28:22,632 INFO L125 PetriNetUnfolderBase]: For 113625/113625 co-relation queries the response was YES. [2024-10-11 14:28:22,667 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34800 conditions, 4940 events. 2625/4940 cut-off events. For 113625/113625 co-relation queries the response was YES. Maximal size of possible extension queue 250. Compared 33616 event pairs, 327 based on Foata normal form. 17/4957 useless extension candidates. Maximal degree in co-relation 34716. Up to 1076 conditions per place. [2024-10-11 14:28:22,684 INFO L140 encePairwiseOnDemand]: 18/26 looper letters, 297 selfloop transitions, 238 changer transitions 15/551 dead transitions. [2024-10-11 14:28:22,685 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 292 places, 551 transitions, 8601 flow [2024-10-11 14:28:22,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2024-10-11 14:28:22,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2024-10-11 14:28:22,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 379 transitions. [2024-10-11 14:28:22,686 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.38360323886639675 [2024-10-11 14:28:22,686 INFO L175 Difference]: Start difference. First operand has 256 places, 346 transitions, 5039 flow. Second operand 38 states and 379 transitions. [2024-10-11 14:28:22,686 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 292 places, 551 transitions, 8601 flow [2024-10-11 14:28:23,053 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 284 places, 551 transitions, 8316 flow, removed 89 selfloop flow, removed 8 redundant places. [2024-10-11 14:28:23,059 INFO L231 Difference]: Finished difference. Result has 291 places, 369 transitions, 5767 flow [2024-10-11 14:28:23,060 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=26, PETRI_DIFFERENCE_MINUEND_FLOW=4758, PETRI_DIFFERENCE_MINUEND_PLACES=247, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=343, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=212, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=125, PETRI_DIFFERENCE_SUBTRAHEND_STATES=38, PETRI_FLOW=5767, PETRI_PLACES=291, PETRI_TRANSITIONS=369} [2024-10-11 14:28:23,060 INFO L277 CegarLoopForPetriNet]: 25 programPoint places, 266 predicate places. [2024-10-11 14:28:23,060 INFO L471 AbstractCegarLoop]: Abstraction has has 291 places, 369 transitions, 5767 flow [2024-10-11 14:28:23,061 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 5.85) internal successors, (117), 20 states have internal predecessors, (117), 0 states have call successors, (0), 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 14:28:23,061 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 14:28:23,061 INFO L204 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 14:28:23,074 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 14:28:23,261 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,SelfDestructingSolverStorable22 [2024-10-11 14:28:23,261 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 14:28:23,262 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 14:28:23,262 INFO L85 PathProgramCache]: Analyzing trace with hash 683749024, now seen corresponding path program 11 times [2024-10-11 14:28:23,262 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 14:28:23,262 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1617823581] [2024-10-11 14:28:23,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 14:28:23,262 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 14:28:23,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 14:28:23,755 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-10-11 14:28:23,755 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 14:28:23,756 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1617823581] [2024-10-11 14:28:23,756 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1617823581] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-11 14:28:23,756 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1579100593] [2024-10-11 14:28:23,756 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-10-11 14:28:23,756 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 14:28:23,756 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 14:28:23,757 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 14:28:23,758 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 14:28:23,858 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2024-10-11 14:28:23,858 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-11 14:28:23,860 INFO L255 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 39 conjuncts are in the unsatisfiable core [2024-10-11 14:28:23,862 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 14:28:23,874 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-10-11 14:28:23,883 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 1 [2024-10-11 14:28:23,895 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 1 [2024-10-11 14:28:24,065 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 61 treesize of output 37 [2024-10-11 14:28:24,077 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 5 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 14:28:24,077 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-11 14:28:24,266 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-10-11 14:28:24,267 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1579100593] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-11 14:28:24,267 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-11 14:28:24,267 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11, 8] total 24 [2024-10-11 14:28:24,267 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [897825159] [2024-10-11 14:28:24,267 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-11 14:28:24,267 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2024-10-11 14:28:24,268 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 14:28:24,268 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2024-10-11 14:28:24,268 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=470, Unknown=0, NotChecked=0, Total=552 [2024-10-11 14:28:24,268 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 26 [2024-10-11 14:28:24,269 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 291 places, 369 transitions, 5767 flow. Second operand has 24 states, 24 states have (on average 5.375) internal successors, (129), 24 states have internal predecessors, (129), 0 states have call successors, (0), 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 14:28:24,269 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 14:28:24,269 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 26 [2024-10-11 14:28:24,269 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 14:28:25,699 INFO L124 PetriNetUnfolderBase]: 2622/4937 cut-off events. [2024-10-11 14:28:25,699 INFO L125 PetriNetUnfolderBase]: For 114515/114515 co-relation queries the response was YES. [2024-10-11 14:28:25,730 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34892 conditions, 4937 events. 2622/4937 cut-off events. For 114515/114515 co-relation queries the response was YES. Maximal size of possible extension queue 248. Compared 33865 event pairs, 1286 based on Foata normal form. 3/4940 useless extension candidates. Maximal degree in co-relation 34801. Up to 2704 conditions per place. [2024-10-11 14:28:25,745 INFO L140 encePairwiseOnDemand]: 16/26 looper letters, 326 selfloop transitions, 87 changer transitions 15/429 dead transitions. [2024-10-11 14:28:25,745 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 302 places, 429 transitions, 7253 flow [2024-10-11 14:28:25,745 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-10-11 14:28:25,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-10-11 14:28:25,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 109 transitions. [2024-10-11 14:28:25,746 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.34935897435897434 [2024-10-11 14:28:25,746 INFO L175 Difference]: Start difference. First operand has 291 places, 369 transitions, 5767 flow. Second operand 12 states and 109 transitions. [2024-10-11 14:28:25,746 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 302 places, 429 transitions, 7253 flow [2024-10-11 14:28:26,075 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 280 places, 429 transitions, 6813 flow, removed 44 selfloop flow, removed 22 redundant places. [2024-10-11 14:28:26,081 INFO L231 Difference]: Finished difference. Result has 282 places, 366 transitions, 5491 flow [2024-10-11 14:28:26,082 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=26, PETRI_DIFFERENCE_MINUEND_FLOW=5313, PETRI_DIFFERENCE_MINUEND_PLACES=269, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=368, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=86, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=281, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=5491, PETRI_PLACES=282, PETRI_TRANSITIONS=366} [2024-10-11 14:28:26,082 INFO L277 CegarLoopForPetriNet]: 25 programPoint places, 257 predicate places. [2024-10-11 14:28:26,082 INFO L471 AbstractCegarLoop]: Abstraction has has 282 places, 366 transitions, 5491 flow [2024-10-11 14:28:26,083 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 5.375) internal successors, (129), 24 states have internal predecessors, (129), 0 states have call successors, (0), 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 14:28:26,083 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 14:28:26,083 INFO L204 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 14:28:26,101 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 14:28:26,283 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,SelfDestructingSolverStorable23 [2024-10-11 14:28:26,283 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 14:28:26,284 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 14:28:26,284 INFO L85 PathProgramCache]: Analyzing trace with hash 1332979028, now seen corresponding path program 12 times [2024-10-11 14:28:26,284 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 14:28:26,284 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [90190704] [2024-10-11 14:28:26,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 14:28:26,284 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 14:28:26,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 14:28:26,744 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-10-11 14:28:26,744 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 14:28:26,745 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [90190704] [2024-10-11 14:28:26,745 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [90190704] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-11 14:28:26,745 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1531448366] [2024-10-11 14:28:26,745 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-10-11 14:28:26,745 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 14:28:26,745 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 14:28:26,747 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 14:28:26,749 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 14:28:26,866 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2024-10-11 14:28:26,866 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-11 14:28:26,868 INFO L255 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 27 conjuncts are in the unsatisfiable core [2024-10-11 14:28:26,869 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 14:28:27,077 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-10-11 14:28:27,077 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-11 14:28:27,265 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2024-10-11 14:28:27,266 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 40 treesize of output 19 [2024-10-11 14:28:27,289 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-10-11 14:28:27,289 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1531448366] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-11 14:28:27,289 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-11 14:28:27,289 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 7] total 18 [2024-10-11 14:28:27,290 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [120013133] [2024-10-11 14:28:27,290 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-11 14:28:27,290 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-10-11 14:28:27,290 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 14:28:27,291 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-10-11 14:28:27,291 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=238, Unknown=0, NotChecked=0, Total=306 [2024-10-11 14:28:27,291 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 26 [2024-10-11 14:28:27,291 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 282 places, 366 transitions, 5491 flow. Second operand has 18 states, 18 states have (on average 5.944444444444445) internal successors, (107), 18 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 14:28:27,291 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 14:28:27,291 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 26 [2024-10-11 14:28:27,291 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 14:28:28,946 INFO L124 PetriNetUnfolderBase]: 2538/4747 cut-off events. [2024-10-11 14:28:28,947 INFO L125 PetriNetUnfolderBase]: For 112307/112307 co-relation queries the response was YES. [2024-10-11 14:28:28,986 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34385 conditions, 4747 events. 2538/4747 cut-off events. For 112307/112307 co-relation queries the response was YES. Maximal size of possible extension queue 240. Compared 31898 event pairs, 360 based on Foata normal form. 21/4768 useless extension candidates. Maximal degree in co-relation 34294. Up to 1002 conditions per place. [2024-10-11 14:28:29,003 INFO L140 encePairwiseOnDemand]: 18/26 looper letters, 247 selfloop transitions, 214 changer transitions 4/466 dead transitions. [2024-10-11 14:28:29,003 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 299 places, 466 transitions, 7544 flow [2024-10-11 14:28:29,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2024-10-11 14:28:29,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2024-10-11 14:28:29,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 204 transitions. [2024-10-11 14:28:29,005 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.3411371237458194 [2024-10-11 14:28:29,005 INFO L175 Difference]: Start difference. First operand has 282 places, 366 transitions, 5491 flow. Second operand 23 states and 204 transitions. [2024-10-11 14:28:29,005 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 299 places, 466 transitions, 7544 flow [2024-10-11 14:28:29,386 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 286 places, 466 transitions, 7287 flow, removed 24 selfloop flow, removed 13 redundant places. [2024-10-11 14:28:29,393 INFO L231 Difference]: Finished difference. Result has 288 places, 379 transitions, 6023 flow [2024-10-11 14:28:29,394 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=26, PETRI_DIFFERENCE_MINUEND_FLOW=5133, PETRI_DIFFERENCE_MINUEND_PLACES=264, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=356, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=191, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=158, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=6023, PETRI_PLACES=288, PETRI_TRANSITIONS=379} [2024-10-11 14:28:29,394 INFO L277 CegarLoopForPetriNet]: 25 programPoint places, 263 predicate places. [2024-10-11 14:28:29,394 INFO L471 AbstractCegarLoop]: Abstraction has has 288 places, 379 transitions, 6023 flow [2024-10-11 14:28:29,394 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 5.944444444444445) internal successors, (107), 18 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 14:28:29,395 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 14:28:29,395 INFO L204 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 14:28:29,407 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2024-10-11 14:28:29,595 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,SelfDestructingSolverStorable24 [2024-10-11 14:28:29,595 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 14:28:29,596 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 14:28:29,596 INFO L85 PathProgramCache]: Analyzing trace with hash 1446200206, now seen corresponding path program 13 times [2024-10-11 14:28:29,596 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 14:28:29,596 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1208454967] [2024-10-11 14:28:29,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 14:28:29,596 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 14:28:29,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 14:28:29,992 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-10-11 14:28:29,993 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 14:28:29,993 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1208454967] [2024-10-11 14:28:29,993 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1208454967] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-11 14:28:29,993 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [301041287] [2024-10-11 14:28:29,993 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-10-11 14:28:29,993 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 14:28:29,993 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 14:28:29,994 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 14:28:30,001 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 14:28:30,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 14:28:30,102 INFO L255 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 22 conjuncts are in the unsatisfiable core [2024-10-11 14:28:30,103 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 14:28:30,221 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 61 treesize of output 37 [2024-10-11 14:28:30,242 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-10-11 14:28:30,243 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-11 14:28:30,420 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2024-10-11 14:28:30,421 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 109 treesize of output 56 [2024-10-11 14:28:30,449 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-10-11 14:28:30,449 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [301041287] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-11 14:28:30,449 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-11 14:28:30,449 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 8] total 20 [2024-10-11 14:28:30,449 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [288661590] [2024-10-11 14:28:30,449 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-11 14:28:30,449 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-10-11 14:28:30,450 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 14:28:30,450 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-10-11 14:28:30,450 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=322, Unknown=0, NotChecked=0, Total=380 [2024-10-11 14:28:30,450 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 26 [2024-10-11 14:28:30,450 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 288 places, 379 transitions, 6023 flow. Second operand has 20 states, 20 states have (on average 5.9) internal successors, (118), 20 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 14:28:30,450 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 14:28:30,450 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 26 [2024-10-11 14:28:30,451 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 14:28:31,570 INFO L124 PetriNetUnfolderBase]: 2517/4692 cut-off events. [2024-10-11 14:28:31,570 INFO L125 PetriNetUnfolderBase]: For 113434/113434 co-relation queries the response was YES. [2024-10-11 14:28:31,609 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33963 conditions, 4692 events. 2517/4692 cut-off events. For 113434/113434 co-relation queries the response was YES. Maximal size of possible extension queue 239. Compared 31409 event pairs, 1031 based on Foata normal form. 3/4695 useless extension candidates. Maximal degree in co-relation 33876. Up to 2175 conditions per place. [2024-10-11 14:28:31,627 INFO L140 encePairwiseOnDemand]: 18/26 looper letters, 267 selfloop transitions, 138 changer transitions 11/417 dead transitions. [2024-10-11 14:28:31,628 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 298 places, 417 transitions, 7213 flow [2024-10-11 14:28:31,628 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-10-11 14:28:31,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-10-11 14:28:31,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 118 transitions. [2024-10-11 14:28:31,629 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.34911242603550297 [2024-10-11 14:28:31,629 INFO L175 Difference]: Start difference. First operand has 288 places, 379 transitions, 6023 flow. Second operand 13 states and 118 transitions. [2024-10-11 14:28:31,629 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 298 places, 417 transitions, 7213 flow [2024-10-11 14:28:32,001 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 287 places, 417 transitions, 7092 flow, removed 28 selfloop flow, removed 11 redundant places. [2024-10-11 14:28:32,007 INFO L231 Difference]: Finished difference. Result has 287 places, 373 transitions, 6100 flow [2024-10-11 14:28:32,008 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=26, PETRI_DIFFERENCE_MINUEND_FLOW=5870, PETRI_DIFFERENCE_MINUEND_PLACES=275, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=376, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=138, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=238, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=6100, PETRI_PLACES=287, PETRI_TRANSITIONS=373} [2024-10-11 14:28:32,009 INFO L277 CegarLoopForPetriNet]: 25 programPoint places, 262 predicate places. [2024-10-11 14:28:32,009 INFO L471 AbstractCegarLoop]: Abstraction has has 287 places, 373 transitions, 6100 flow [2024-10-11 14:28:32,009 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 5.9) internal successors, (118), 20 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 14:28:32,009 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 14:28:32,009 INFO L204 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 14:28:32,022 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 14:28:32,209 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,18 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 14:28:32,210 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 14:28:32,210 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 14:28:32,210 INFO L85 PathProgramCache]: Analyzing trace with hash 108091056, now seen corresponding path program 14 times [2024-10-11 14:28:32,210 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 14:28:32,210 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1369667903] [2024-10-11 14:28:32,211 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 14:28:32,211 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 14:28:32,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 14:28:32,677 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-10-11 14:28:32,678 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 14:28:32,678 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1369667903] [2024-10-11 14:28:32,678 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1369667903] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-11 14:28:32,678 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1487932610] [2024-10-11 14:28:32,678 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-11 14:28:32,678 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 14:28:32,678 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 14:28:32,680 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 14:28:32,682 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 14:28:32,794 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-11 14:28:32,794 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-11 14:28:32,796 INFO L255 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 25 conjuncts are in the unsatisfiable core [2024-10-11 14:28:32,797 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 14:28:33,008 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-10-11 14:28:33,009 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-11 14:28:33,128 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-11 14:28:33,128 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 54 treesize of output 30 [2024-10-11 14:28:33,178 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-10-11 14:28:33,178 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1487932610] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-11 14:28:33,178 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-11 14:28:33,178 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 7] total 18 [2024-10-11 14:28:33,178 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [811365384] [2024-10-11 14:28:33,178 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-11 14:28:33,178 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-10-11 14:28:33,179 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 14:28:33,179 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-10-11 14:28:33,179 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=239, Unknown=0, NotChecked=0, Total=306 [2024-10-11 14:28:33,179 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 26 [2024-10-11 14:28:33,179 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 287 places, 373 transitions, 6100 flow. Second operand has 18 states, 18 states have (on average 6.055555555555555) internal successors, (109), 18 states have internal predecessors, (109), 0 states have call successors, (0), 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 14:28:33,179 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 14:28:33,179 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 26 [2024-10-11 14:28:33,180 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 14:28:34,296 INFO L124 PetriNetUnfolderBase]: 2597/4829 cut-off events. [2024-10-11 14:28:34,297 INFO L125 PetriNetUnfolderBase]: For 122479/122479 co-relation queries the response was YES.