./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/weaver/chl-name-comparator-trans.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 803cd42f Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/weaver/chl-name-comparator-trans.wvr.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 362ca5c35cce683744d8d619a442f154ce469608d45ae43ff282ddf886694959 --- Real Ultimate output --- This is Ultimate 0.2.5-tmp.dk.eval-assert-order-craig-803cd42-m [2024-11-22 13:44:56,825 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-22 13:44:56,881 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-11-22 13:44:56,884 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-22 13:44:56,885 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-22 13:44:56,909 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-22 13:44:56,909 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-22 13:44:56,910 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-22 13:44:56,911 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-22 13:44:56,913 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-22 13:44:56,914 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-22 13:44:56,914 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-22 13:44:56,914 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-22 13:44:56,914 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-22 13:44:56,916 INFO L153 SettingsManager]: * Use SBE=true [2024-11-22 13:44:56,916 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-22 13:44:56,916 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-11-22 13:44:56,917 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-22 13:44:56,917 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-22 13:44:56,917 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-22 13:44:56,917 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-22 13:44:56,918 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-11-22 13:44:56,918 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-22 13:44:56,918 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-11-22 13:44:56,918 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-22 13:44:56,918 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-22 13:44:56,919 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-11-22 13:44:56,919 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-22 13:44:56,919 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-22 13:44:56,919 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-22 13:44:56,919 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-22 13:44:56,919 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-22 13:44:56,920 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-22 13:44:56,920 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-22 13:44:56,920 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-22 13:44:56,920 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-11-22 13:44:56,920 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-22 13:44:56,920 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-22 13:44:56,921 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-22 13:44:56,921 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-22 13:44:56,921 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-22 13:44:56,922 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-22 13:44:56,922 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 362ca5c35cce683744d8d619a442f154ce469608d45ae43ff282ddf886694959 [2024-11-22 13:44:57,125 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-22 13:44:57,141 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-22 13:44:57,143 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-22 13:44:57,144 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-22 13:44:57,145 INFO L274 PluginConnector]: CDTParser initialized [2024-11-22 13:44:57,146 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/weaver/chl-name-comparator-trans.wvr.c [2024-11-22 13:44:58,395 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-22 13:44:58,546 INFO L384 CDTParser]: Found 1 translation units. [2024-11-22 13:44:58,547 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/chl-name-comparator-trans.wvr.c [2024-11-22 13:44:58,553 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1ecd57d2d/73084cbeb3704c5aa71ef8ca3d877994/FLAG2019b1842 [2024-11-22 13:44:58,947 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1ecd57d2d/73084cbeb3704c5aa71ef8ca3d877994 [2024-11-22 13:44:58,949 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-22 13:44:58,950 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-22 13:44:58,951 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-22 13:44:58,951 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-22 13:44:58,955 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-22 13:44:58,955 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.11 01:44:58" (1/1) ... [2024-11-22 13:44:58,957 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@64258114 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:44:58, skipping insertion in model container [2024-11-22 13:44:58,957 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.11 01:44:58" (1/1) ... [2024-11-22 13:44:58,979 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-22 13:44:59,172 WARN L250 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/chl-name-comparator-trans.wvr.c[4827,4840] [2024-11-22 13:44:59,180 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-22 13:44:59,187 INFO L200 MainTranslator]: Completed pre-run [2024-11-22 13:44:59,215 WARN L250 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/chl-name-comparator-trans.wvr.c[4827,4840] [2024-11-22 13:44:59,218 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-22 13:44:59,234 INFO L204 MainTranslator]: Completed translation [2024-11-22 13:44:59,234 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:44:59 WrapperNode [2024-11-22 13:44:59,235 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-22 13:44:59,235 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-22 13:44:59,236 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-22 13:44:59,236 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-22 13:44:59,241 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:44:59" (1/1) ... [2024-11-22 13:44:59,249 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:44:59" (1/1) ... [2024-11-22 13:44:59,300 INFO L138 Inliner]: procedures = 25, calls = 29, calls flagged for inlining = 17, calls inlined = 21, statements flattened = 304 [2024-11-22 13:44:59,300 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-22 13:44:59,301 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-22 13:44:59,301 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-22 13:44:59,301 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-22 13:44:59,320 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:44:59" (1/1) ... [2024-11-22 13:44:59,320 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:44:59" (1/1) ... [2024-11-22 13:44:59,327 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:44:59" (1/1) ... [2024-11-22 13:44:59,373 INFO L175 MemorySlicer]: Split 6 memory accesses to 2 slices as follows [2, 4]. 67 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]. [2024-11-22 13:44:59,373 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:44:59" (1/1) ... [2024-11-22 13:44:59,373 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:44:59" (1/1) ... [2024-11-22 13:44:59,379 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:44:59" (1/1) ... [2024-11-22 13:44:59,386 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:44:59" (1/1) ... [2024-11-22 13:44:59,387 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:44:59" (1/1) ... [2024-11-22 13:44:59,390 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:44:59" (1/1) ... [2024-11-22 13:44:59,392 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-22 13:44:59,396 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-22 13:44:59,396 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-22 13:44:59,396 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-22 13:44:59,397 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:44:59" (1/1) ... [2024-11-22 13:44:59,404 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-22 13:44:59,413 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-22 13:44:59,435 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-11-22 13:44:59,437 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-11-22 13:44:59,473 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-22 13:44:59,474 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2024-11-22 13:44:59,474 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2024-11-22 13:44:59,475 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2024-11-22 13:44:59,475 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2024-11-22 13:44:59,475 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2024-11-22 13:44:59,475 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2024-11-22 13:44:59,475 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-11-22 13:44:59,476 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-11-22 13:44:59,476 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-11-22 13:44:59,476 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-11-22 13:44:59,476 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-11-22 13:44:59,476 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-22 13:44:59,476 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-22 13:44:59,476 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-11-22 13:44:59,477 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-11-22 13:44:59,478 WARN L207 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2024-11-22 13:44:59,589 INFO L238 CfgBuilder]: Building ICFG [2024-11-22 13:44:59,591 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-22 13:44:59,938 INFO L283 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2024-11-22 13:44:59,939 INFO L287 CfgBuilder]: Performing block encoding [2024-11-22 13:45:00,259 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-22 13:45:00,259 INFO L316 CfgBuilder]: Removed 4 assume(true) statements. [2024-11-22 13:45:00,259 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 01:45:00 BoogieIcfgContainer [2024-11-22 13:45:00,259 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-22 13:45:00,261 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-22 13:45:00,261 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-22 13:45:00,264 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-22 13:45:00,264 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.11 01:44:58" (1/3) ... [2024-11-22 13:45:00,265 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@41e63620 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.11 01:45:00, skipping insertion in model container [2024-11-22 13:45:00,265 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:44:59" (2/3) ... [2024-11-22 13:45:00,266 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@41e63620 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.11 01:45:00, skipping insertion in model container [2024-11-22 13:45:00,266 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 01:45:00" (3/3) ... [2024-11-22 13:45:00,267 INFO L112 eAbstractionObserver]: Analyzing ICFG chl-name-comparator-trans.wvr.c [2024-11-22 13:45:00,281 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-22 13:45:00,281 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-11-22 13:45:00,281 INFO L489 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-11-22 13:45:00,332 INFO L143 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2024-11-22 13:45:00,361 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 39 places, 36 transitions, 93 flow [2024-11-22 13:45:00,390 INFO L124 PetriNetUnfolderBase]: 7/33 cut-off events. [2024-11-22 13:45:00,390 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2024-11-22 13:45:00,394 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46 conditions, 33 events. 7/33 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 42 event pairs, 0 based on Foata normal form. 0/25 useless extension candidates. Maximal degree in co-relation 27. Up to 2 conditions per place. [2024-11-22 13:45:00,394 INFO L82 GeneralOperation]: Start removeDead. Operand has 39 places, 36 transitions, 93 flow [2024-11-22 13:45:00,396 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 35 places, 32 transitions, 82 flow [2024-11-22 13:45:00,407 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-22 13:45:00,413 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;@129b38a3, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-22 13:45:00,414 INFO L334 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2024-11-22 13:45:00,425 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-11-22 13:45:00,425 INFO L124 PetriNetUnfolderBase]: 7/31 cut-off events. [2024-11-22 13:45:00,426 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2024-11-22 13:45:00,426 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-22 13:45:00,426 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-22 13:45:00,427 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-11-22 13:45:00,431 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 13:45:00,432 INFO L85 PathProgramCache]: Analyzing trace with hash -447705035, now seen corresponding path program 1 times [2024-11-22 13:45:00,439 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 13:45:00,440 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [114119779] [2024-11-22 13:45:00,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 13:45:00,440 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 13:45:00,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 13:45:00,661 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-22 13:45:00,661 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 13:45:00,662 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [114119779] [2024-11-22 13:45:00,662 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [114119779] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-22 13:45:00,662 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-22 13:45:00,662 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-22 13:45:00,663 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1388481013] [2024-11-22 13:45:00,664 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-22 13:45:00,671 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2024-11-22 13:45:00,675 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 13:45:00,698 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2024-11-22 13:45:00,699 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-11-22 13:45:00,700 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 36 [2024-11-22 13:45:00,701 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 35 places, 32 transitions, 82 flow. Second operand has 2 states, 2 states have (on average 14.5) internal successors, (29), 2 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-22 13:45:00,702 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-22 13:45:00,702 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 36 [2024-11-22 13:45:00,702 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-22 13:45:00,974 INFO L124 PetriNetUnfolderBase]: 792/1137 cut-off events. [2024-11-22 13:45:00,974 INFO L125 PetriNetUnfolderBase]: For 93/93 co-relation queries the response was YES. [2024-11-22 13:45:00,977 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2371 conditions, 1137 events. 792/1137 cut-off events. For 93/93 co-relation queries the response was YES. Maximal size of possible extension queue 46. Compared 3706 event pairs, 608 based on Foata normal form. 0/953 useless extension candidates. Maximal degree in co-relation 2150. Up to 1137 conditions per place. [2024-11-22 13:45:00,984 INFO L140 encePairwiseOnDemand]: 33/36 looper letters, 28 selfloop transitions, 0 changer transitions 0/29 dead transitions. [2024-11-22 13:45:00,984 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 36 places, 29 transitions, 132 flow [2024-11-22 13:45:00,985 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2024-11-22 13:45:00,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2024-11-22 13:45:00,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 39 transitions. [2024-11-22 13:45:00,994 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5416666666666666 [2024-11-22 13:45:00,997 INFO L175 Difference]: Start difference. First operand has 35 places, 32 transitions, 82 flow. Second operand 2 states and 39 transitions. [2024-11-22 13:45:00,998 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 36 places, 29 transitions, 132 flow [2024-11-22 13:45:01,003 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 30 places, 29 transitions, 120 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-11-22 13:45:01,004 INFO L231 Difference]: Finished difference. Result has 30 places, 29 transitions, 64 flow [2024-11-22 13:45:01,006 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=36, PETRI_DIFFERENCE_MINUEND_FLOW=64, PETRI_DIFFERENCE_MINUEND_PLACES=29, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=29, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=64, PETRI_PLACES=30, PETRI_TRANSITIONS=29} [2024-11-22 13:45:01,012 INFO L277 CegarLoopForPetriNet]: 35 programPoint places, -5 predicate places. [2024-11-22 13:45:01,012 INFO L471 AbstractCegarLoop]: Abstraction has has 30 places, 29 transitions, 64 flow [2024-11-22 13:45:01,012 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 14.5) internal successors, (29), 2 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-22 13:45:01,012 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-22 13:45:01,012 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-22 13:45:01,012 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-22 13:45:01,013 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-11-22 13:45:01,013 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 13:45:01,014 INFO L85 PathProgramCache]: Analyzing trace with hash 1234612696, now seen corresponding path program 1 times [2024-11-22 13:45:01,014 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 13:45:01,014 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2044343801] [2024-11-22 13:45:01,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 13:45:01,014 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 13:45:01,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 13:45:01,240 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-22 13:45:01,240 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 13:45:01,241 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2044343801] [2024-11-22 13:45:01,242 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2044343801] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-22 13:45:01,242 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-22 13:45:01,242 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-22 13:45:01,242 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [69744604] [2024-11-22 13:45:01,242 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-22 13:45:01,244 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-22 13:45:01,245 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 13:45:01,245 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-22 13:45:01,245 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-22 13:45:01,246 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 36 [2024-11-22 13:45:01,246 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 30 places, 29 transitions, 64 flow. Second operand has 3 states, 3 states have (on average 12.0) internal successors, (36), 3 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-22 13:45:01,247 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-22 13:45:01,247 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 36 [2024-11-22 13:45:01,247 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-22 13:45:01,399 INFO L124 PetriNetUnfolderBase]: 792/1138 cut-off events. [2024-11-22 13:45:01,399 INFO L125 PetriNetUnfolderBase]: For 19/19 co-relation queries the response was YES. [2024-11-22 13:45:01,401 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2309 conditions, 1138 events. 792/1138 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 46. Compared 3700 event pairs, 608 based on Foata normal form. 0/954 useless extension candidates. Maximal degree in co-relation 2306. Up to 1137 conditions per place. [2024-11-22 13:45:01,407 INFO L140 encePairwiseOnDemand]: 33/36 looper letters, 27 selfloop transitions, 2 changer transitions 0/30 dead transitions. [2024-11-22 13:45:01,407 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 32 places, 30 transitions, 124 flow [2024-11-22 13:45:01,408 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-22 13:45:01,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-22 13:45:01,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 42 transitions. [2024-11-22 13:45:01,409 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.3888888888888889 [2024-11-22 13:45:01,409 INFO L175 Difference]: Start difference. First operand has 30 places, 29 transitions, 64 flow. Second operand 3 states and 42 transitions. [2024-11-22 13:45:01,409 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 32 places, 30 transitions, 124 flow [2024-11-22 13:45:01,409 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 32 places, 30 transitions, 124 flow, removed 0 selfloop flow, removed 0 redundant places. [2024-11-22 13:45:01,410 INFO L231 Difference]: Finished difference. Result has 33 places, 30 transitions, 76 flow [2024-11-22 13:45:01,411 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=36, PETRI_DIFFERENCE_MINUEND_FLOW=64, PETRI_DIFFERENCE_MINUEND_PLACES=30, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=29, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=76, PETRI_PLACES=33, PETRI_TRANSITIONS=30} [2024-11-22 13:45:01,413 INFO L277 CegarLoopForPetriNet]: 35 programPoint places, -2 predicate places. [2024-11-22 13:45:01,413 INFO L471 AbstractCegarLoop]: Abstraction has has 33 places, 30 transitions, 76 flow [2024-11-22 13:45:01,413 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 12.0) internal successors, (36), 3 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-22 13:45:01,413 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-22 13:45:01,413 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-22 13:45:01,414 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-22 13:45:01,414 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-11-22 13:45:01,414 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 13:45:01,415 INFO L85 PathProgramCache]: Analyzing trace with hash 321585607, now seen corresponding path program 1 times [2024-11-22 13:45:01,415 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 13:45:01,415 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1450713783] [2024-11-22 13:45:01,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 13:45:01,415 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 13:45:01,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 13:45:01,557 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-22 13:45:01,557 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 13:45:01,557 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1450713783] [2024-11-22 13:45:01,558 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1450713783] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-22 13:45:01,558 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1106281298] [2024-11-22 13:45:01,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 13:45:01,558 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 13:45:01,559 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-22 13:45:01,561 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-22 13:45:01,562 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-22 13:45:01,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 13:45:01,652 INFO L255 TraceCheckSpWp]: Trace formula consists of 215 conjuncts, 5 conjuncts are in the unsatisfiable core [2024-11-22 13:45:01,655 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-22 13:45:01,694 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-22 13:45:01,694 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-22 13:45:01,709 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-22 13:45:01,710 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1106281298] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-22 13:45:01,710 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-22 13:45:01,710 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2024-11-22 13:45:01,710 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1706934304] [2024-11-22 13:45:01,710 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-22 13:45:01,711 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-22 13:45:01,711 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 13:45:01,711 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-22 13:45:01,711 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-11-22 13:45:01,712 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 36 [2024-11-22 13:45:01,712 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 33 places, 30 transitions, 76 flow. Second operand has 7 states, 7 states have (on average 8.428571428571429) internal successors, (59), 7 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-22 13:45:01,712 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-22 13:45:01,712 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 36 [2024-11-22 13:45:01,712 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-22 13:45:01,865 INFO L124 PetriNetUnfolderBase]: 792/1140 cut-off events. [2024-11-22 13:45:01,865 INFO L125 PetriNetUnfolderBase]: For 19/19 co-relation queries the response was YES. [2024-11-22 13:45:01,867 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2322 conditions, 1140 events. 792/1140 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 46. Compared 3700 event pairs, 608 based on Foata normal form. 0/956 useless extension candidates. Maximal degree in co-relation 2317. Up to 1137 conditions per place. [2024-11-22 13:45:01,869 INFO L140 encePairwiseOnDemand]: 33/36 looper letters, 27 selfloop transitions, 4 changer transitions 0/32 dead transitions. [2024-11-22 13:45:01,870 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 37 places, 32 transitions, 146 flow [2024-11-22 13:45:01,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-22 13:45:01,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-22 13:45:01,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 53 transitions. [2024-11-22 13:45:01,871 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.29444444444444445 [2024-11-22 13:45:01,871 INFO L175 Difference]: Start difference. First operand has 33 places, 30 transitions, 76 flow. Second operand 5 states and 53 transitions. [2024-11-22 13:45:01,871 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 37 places, 32 transitions, 146 flow [2024-11-22 13:45:01,871 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 36 places, 32 transitions, 142 flow, removed 1 selfloop flow, removed 1 redundant places. [2024-11-22 13:45:01,872 INFO L231 Difference]: Finished difference. Result has 38 places, 32 transitions, 98 flow [2024-11-22 13:45:01,872 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=36, PETRI_DIFFERENCE_MINUEND_FLOW=72, PETRI_DIFFERENCE_MINUEND_PLACES=32, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=30, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=98, PETRI_PLACES=38, PETRI_TRANSITIONS=32} [2024-11-22 13:45:01,872 INFO L277 CegarLoopForPetriNet]: 35 programPoint places, 3 predicate places. [2024-11-22 13:45:01,873 INFO L471 AbstractCegarLoop]: Abstraction has has 38 places, 32 transitions, 98 flow [2024-11-22 13:45:01,873 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 8.428571428571429) internal successors, (59), 7 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-22 13:45:01,873 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-22 13:45:01,873 INFO L204 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-22 13:45:01,880 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2024-11-22 13:45:02,077 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 13:45:02,079 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-11-22 13:45:02,079 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 13:45:02,079 INFO L85 PathProgramCache]: Analyzing trace with hash 836812775, now seen corresponding path program 2 times [2024-11-22 13:45:02,079 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 13:45:02,079 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1085296024] [2024-11-22 13:45:02,079 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-22 13:45:02,079 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 13:45:02,123 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2024-11-22 13:45:02,123 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-22 13:45:02,303 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-22 13:45:02,303 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 13:45:02,303 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1085296024] [2024-11-22 13:45:02,304 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1085296024] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-22 13:45:02,304 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-22 13:45:02,304 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-22 13:45:02,304 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [374180254] [2024-11-22 13:45:02,304 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-22 13:45:02,304 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-22 13:45:02,304 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 13:45:02,305 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-22 13:45:02,305 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-22 13:45:02,305 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 36 [2024-11-22 13:45:02,305 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 38 places, 32 transitions, 98 flow. Second operand has 4 states, 4 states have (on average 10.25) internal successors, (41), 4 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-22 13:45:02,305 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-22 13:45:02,305 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 36 [2024-11-22 13:45:02,305 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-22 13:45:02,581 INFO L124 PetriNetUnfolderBase]: 1435/2062 cut-off events. [2024-11-22 13:45:02,581 INFO L125 PetriNetUnfolderBase]: For 18/18 co-relation queries the response was YES. [2024-11-22 13:45:02,585 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4199 conditions, 2062 events. 1435/2062 cut-off events. For 18/18 co-relation queries the response was YES. Maximal size of possible extension queue 78. Compared 8255 event pairs, 608 based on Foata normal form. 1/1719 useless extension candidates. Maximal degree in co-relation 4192. Up to 1140 conditions per place. [2024-11-22 13:45:02,590 INFO L140 encePairwiseOnDemand]: 32/36 looper letters, 46 selfloop transitions, 2 changer transitions 20/69 dead transitions. [2024-11-22 13:45:02,591 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 41 places, 69 transitions, 315 flow [2024-11-22 13:45:02,591 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-22 13:45:02,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-22 13:45:02,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 82 transitions. [2024-11-22 13:45:02,592 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5694444444444444 [2024-11-22 13:45:02,592 INFO L175 Difference]: Start difference. First operand has 38 places, 32 transitions, 98 flow. Second operand 4 states and 82 transitions. [2024-11-22 13:45:02,592 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 41 places, 69 transitions, 315 flow [2024-11-22 13:45:02,593 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 40 places, 69 transitions, 305 flow, removed 4 selfloop flow, removed 1 redundant places. [2024-11-22 13:45:02,594 INFO L231 Difference]: Finished difference. Result has 42 places, 33 transitions, 102 flow [2024-11-22 13:45:02,594 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=36, PETRI_DIFFERENCE_MINUEND_FLOW=88, PETRI_DIFFERENCE_MINUEND_PLACES=37, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=32, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=102, PETRI_PLACES=42, PETRI_TRANSITIONS=33} [2024-11-22 13:45:02,594 INFO L277 CegarLoopForPetriNet]: 35 programPoint places, 7 predicate places. [2024-11-22 13:45:02,594 INFO L471 AbstractCegarLoop]: Abstraction has has 42 places, 33 transitions, 102 flow [2024-11-22 13:45:02,594 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 10.25) internal successors, (41), 4 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-22 13:45:02,594 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-22 13:45:02,595 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, 1, 1, 1, 1, 1, 1, 1] [2024-11-22 13:45:02,595 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-11-22 13:45:02,595 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-11-22 13:45:02,597 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 13:45:02,597 INFO L85 PathProgramCache]: Analyzing trace with hash 1570224414, now seen corresponding path program 1 times [2024-11-22 13:45:02,598 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 13:45:02,598 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1456544154] [2024-11-22 13:45:02,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 13:45:02,598 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 13:45:02,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 13:45:02,884 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-22 13:45:02,885 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 13:45:02,885 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1456544154] [2024-11-22 13:45:02,885 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1456544154] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-22 13:45:02,885 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-22 13:45:02,885 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-22 13:45:02,885 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [730877942] [2024-11-22 13:45:02,885 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-22 13:45:02,889 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-22 13:45:02,890 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 13:45:02,890 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-22 13:45:02,890 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-22 13:45:02,890 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 36 [2024-11-22 13:45:02,890 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 33 transitions, 102 flow. Second operand has 4 states, 4 states have (on average 10.75) internal successors, (43), 4 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-22 13:45:02,890 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-22 13:45:02,890 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 36 [2024-11-22 13:45:02,891 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-22 13:45:03,218 INFO L124 PetriNetUnfolderBase]: 2206/3150 cut-off events. [2024-11-22 13:45:03,219 INFO L125 PetriNetUnfolderBase]: For 695/695 co-relation queries the response was YES. [2024-11-22 13:45:03,222 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6950 conditions, 3150 events. 2206/3150 cut-off events. For 695/695 co-relation queries the response was YES. Maximal size of possible extension queue 112. Compared 13252 event pairs, 983 based on Foata normal form. 1/2794 useless extension candidates. Maximal degree in co-relation 6940. Up to 1767 conditions per place. [2024-11-22 13:45:03,230 INFO L140 encePairwiseOnDemand]: 32/36 looper letters, 47 selfloop transitions, 2 changer transitions 19/69 dead transitions. [2024-11-22 13:45:03,232 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 69 transitions, 336 flow [2024-11-22 13:45:03,232 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-22 13:45:03,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-22 13:45:03,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 79 transitions. [2024-11-22 13:45:03,234 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5486111111111112 [2024-11-22 13:45:03,234 INFO L175 Difference]: Start difference. First operand has 42 places, 33 transitions, 102 flow. Second operand 4 states and 79 transitions. [2024-11-22 13:45:03,234 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 69 transitions, 336 flow [2024-11-22 13:45:03,235 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 69 transitions, 328 flow, removed 1 selfloop flow, removed 2 redundant places. [2024-11-22 13:45:03,237 INFO L231 Difference]: Finished difference. Result has 44 places, 34 transitions, 112 flow [2024-11-22 13:45:03,239 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=36, PETRI_DIFFERENCE_MINUEND_FLOW=98, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=112, PETRI_PLACES=44, PETRI_TRANSITIONS=34} [2024-11-22 13:45:03,240 INFO L277 CegarLoopForPetriNet]: 35 programPoint places, 9 predicate places. [2024-11-22 13:45:03,240 INFO L471 AbstractCegarLoop]: Abstraction has has 44 places, 34 transitions, 112 flow [2024-11-22 13:45:03,240 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 10.75) internal successors, (43), 4 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-22 13:45:03,240 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-22 13:45:03,240 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, 1, 1, 1, 1, 1, 1, 1] [2024-11-22 13:45:03,240 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-11-22 13:45:03,241 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-11-22 13:45:03,241 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 13:45:03,241 INFO L85 PathProgramCache]: Analyzing trace with hash 1098083635, now seen corresponding path program 1 times [2024-11-22 13:45:03,241 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 13:45:03,241 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1781809043] [2024-11-22 13:45:03,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 13:45:03,242 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 13:45:03,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 13:45:03,994 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-22 13:45:03,994 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 13:45:03,994 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1781809043] [2024-11-22 13:45:03,995 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1781809043] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-22 13:45:03,995 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [986160573] [2024-11-22 13:45:03,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 13:45:03,995 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 13:45:03,995 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-22 13:45:03,997 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-22 13:45:03,998 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-22 13:45:04,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 13:45:04,086 INFO L255 TraceCheckSpWp]: Trace formula consists of 255 conjuncts, 28 conjuncts are in the unsatisfiable core [2024-11-22 13:45:04,089 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-22 13:45:04,555 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 157 treesize of output 101 [2024-11-22 13:45:05,317 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-22 13:45:05,317 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-22 13:45:06,309 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-22 13:45:06,310 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 195 treesize of output 103 [2024-11-22 13:45:06,483 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-22 13:45:06,483 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [986160573] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-22 13:45:06,483 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-22 13:45:06,485 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 28 [2024-11-22 13:45:06,485 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2127850376] [2024-11-22 13:45:06,485 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-22 13:45:06,486 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2024-11-22 13:45:06,486 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 13:45:06,488 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2024-11-22 13:45:06,488 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=662, Unknown=0, NotChecked=0, Total=756 [2024-11-22 13:45:06,489 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 36 [2024-11-22 13:45:06,489 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 34 transitions, 112 flow. Second operand has 28 states, 28 states have (on average 6.964285714285714) internal successors, (195), 28 states have internal predecessors, (195), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-22 13:45:06,489 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-22 13:45:06,489 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 36 [2024-11-22 13:45:06,489 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-22 13:45:15,356 INFO L124 PetriNetUnfolderBase]: 11881/17127 cut-off events. [2024-11-22 13:45:15,356 INFO L125 PetriNetUnfolderBase]: For 3636/3636 co-relation queries the response was YES. [2024-11-22 13:45:15,380 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39568 conditions, 17127 events. 11881/17127 cut-off events. For 3636/3636 co-relation queries the response was YES. Maximal size of possible extension queue 577. Compared 97087 event pairs, 622 based on Foata normal form. 12/16153 useless extension candidates. Maximal degree in co-relation 39557. Up to 2089 conditions per place. [2024-11-22 13:45:15,431 INFO L140 encePairwiseOnDemand]: 24/36 looper letters, 575 selfloop transitions, 151 changer transitions 102/829 dead transitions. [2024-11-22 13:45:15,431 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 110 places, 829 transitions, 3821 flow [2024-11-22 13:45:15,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2024-11-22 13:45:15,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2024-11-22 13:45:15,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 1101 transitions. [2024-11-22 13:45:15,438 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4497549019607843 [2024-11-22 13:45:15,438 INFO L175 Difference]: Start difference. First operand has 44 places, 34 transitions, 112 flow. Second operand 68 states and 1101 transitions. [2024-11-22 13:45:15,438 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 110 places, 829 transitions, 3821 flow [2024-11-22 13:45:15,443 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 108 places, 829 transitions, 3762 flow, removed 13 selfloop flow, removed 2 redundant places. [2024-11-22 13:45:15,452 INFO L231 Difference]: Finished difference. Result has 153 places, 190 transitions, 1297 flow [2024-11-22 13:45:15,453 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=36, PETRI_DIFFERENCE_MINUEND_FLOW=108, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=34, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=68, PETRI_FLOW=1297, PETRI_PLACES=153, PETRI_TRANSITIONS=190} [2024-11-22 13:45:15,453 INFO L277 CegarLoopForPetriNet]: 35 programPoint places, 118 predicate places. [2024-11-22 13:45:15,453 INFO L471 AbstractCegarLoop]: Abstraction has has 153 places, 190 transitions, 1297 flow [2024-11-22 13:45:15,454 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 6.964285714285714) internal successors, (195), 28 states have internal predecessors, (195), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-22 13:45:15,454 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-22 13:45:15,454 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, 1, 1, 1, 1, 1, 1, 1] [2024-11-22 13:45:15,462 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-11-22 13:45:15,658 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2024-11-22 13:45:15,659 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-11-22 13:45:15,659 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 13:45:15,660 INFO L85 PathProgramCache]: Analyzing trace with hash 322423495, now seen corresponding path program 2 times [2024-11-22 13:45:15,660 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 13:45:15,660 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [951851559] [2024-11-22 13:45:15,660 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-22 13:45:15,660 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 13:45:15,696 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-22 13:45:15,696 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-22 13:45:16,328 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-22 13:45:16,328 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 13:45:16,328 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [951851559] [2024-11-22 13:45:16,328 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [951851559] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-22 13:45:16,328 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [450429381] [2024-11-22 13:45:16,329 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-22 13:45:16,329 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 13:45:16,329 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-22 13:45:16,331 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-22 13:45:16,332 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-22 13:45:16,424 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-22 13:45:16,424 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-22 13:45:16,426 INFO L255 TraceCheckSpWp]: Trace formula consists of 255 conjuncts, 35 conjuncts are in the unsatisfiable core [2024-11-22 13:45:16,428 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-22 13:45:16,888 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 153 treesize of output 97 [2024-11-22 13:45:16,987 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-22 13:45:16,987 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-22 13:45:17,632 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2024-11-22 13:45:17,633 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 105 treesize of output 56 [2024-11-22 13:45:17,656 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-22 13:45:17,656 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [450429381] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-22 13:45:17,656 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-22 13:45:17,656 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12, 11] total 30 [2024-11-22 13:45:17,656 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1984208866] [2024-11-22 13:45:17,656 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-22 13:45:17,656 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2024-11-22 13:45:17,657 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 13:45:17,657 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2024-11-22 13:45:17,658 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=755, Unknown=0, NotChecked=0, Total=870 [2024-11-22 13:45:17,658 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 36 [2024-11-22 13:45:17,658 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 153 places, 190 transitions, 1297 flow. Second operand has 30 states, 30 states have (on average 6.666666666666667) internal successors, (200), 30 states have internal predecessors, (200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-22 13:45:17,658 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-22 13:45:17,658 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 36 [2024-11-22 13:45:17,658 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-22 13:45:24,080 INFO L124 PetriNetUnfolderBase]: 19262/27902 cut-off events. [2024-11-22 13:45:24,085 INFO L125 PetriNetUnfolderBase]: For 599216/599216 co-relation queries the response was YES. [2024-11-22 13:45:24,260 INFO L83 FinitePrefix]: Finished finitePrefix Result has 136078 conditions, 27902 events. 19262/27902 cut-off events. For 599216/599216 co-relation queries the response was YES. Maximal size of possible extension queue 967. Compared 171603 event pairs, 3734 based on Foata normal form. 1/27903 useless extension candidates. Maximal degree in co-relation 136023. Up to 7462 conditions per place. [2024-11-22 13:45:24,358 INFO L140 encePairwiseOnDemand]: 22/36 looper letters, 330 selfloop transitions, 296 changer transitions 18/645 dead transitions. [2024-11-22 13:45:24,359 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 174 places, 645 transitions, 6016 flow [2024-11-22 13:45:24,360 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2024-11-22 13:45:24,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2024-11-22 13:45:24,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 442 transitions. [2024-11-22 13:45:24,367 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.40925925925925927 [2024-11-22 13:45:24,367 INFO L175 Difference]: Start difference. First operand has 153 places, 190 transitions, 1297 flow. Second operand 30 states and 442 transitions. [2024-11-22 13:45:24,367 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 174 places, 645 transitions, 6016 flow [2024-11-22 13:45:26,604 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 162 places, 645 transitions, 5415 flow, removed 270 selfloop flow, removed 12 redundant places. [2024-11-22 13:45:26,610 INFO L231 Difference]: Finished difference. Result has 185 places, 398 transitions, 3707 flow [2024-11-22 13:45:26,611 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=36, PETRI_DIFFERENCE_MINUEND_FLOW=1138, PETRI_DIFFERENCE_MINUEND_PLACES=133, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=190, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=101, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=74, PETRI_DIFFERENCE_SUBTRAHEND_STATES=30, PETRI_FLOW=3707, PETRI_PLACES=185, PETRI_TRANSITIONS=398} [2024-11-22 13:45:26,611 INFO L277 CegarLoopForPetriNet]: 35 programPoint places, 150 predicate places. [2024-11-22 13:45:26,612 INFO L471 AbstractCegarLoop]: Abstraction has has 185 places, 398 transitions, 3707 flow [2024-11-22 13:45:26,612 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 6.666666666666667) internal successors, (200), 30 states have internal predecessors, (200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-22 13:45:26,612 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-22 13:45:26,612 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, 1, 1, 1, 1, 1, 1, 1] [2024-11-22 13:45:26,620 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-11-22 13:45:26,813 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 13:45:26,814 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-11-22 13:45:26,814 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 13:45:26,814 INFO L85 PathProgramCache]: Analyzing trace with hash 1562280635, now seen corresponding path program 3 times [2024-11-22 13:45:26,814 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 13:45:26,814 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1790601658] [2024-11-22 13:45:26,814 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-22 13:45:26,814 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 13:45:26,843 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-11-22 13:45:26,843 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-22 13:45:27,396 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-22 13:45:27,397 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 13:45:27,397 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1790601658] [2024-11-22 13:45:27,397 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1790601658] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-22 13:45:27,397 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [242622366] [2024-11-22 13:45:27,397 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-22 13:45:27,397 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 13:45:27,397 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-22 13:45:27,398 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-22 13:45:27,399 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-22 13:45:27,474 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-11-22 13:45:27,474 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-22 13:45:27,476 INFO L255 TraceCheckSpWp]: Trace formula consists of 246 conjuncts, 32 conjuncts are in the unsatisfiable core [2024-11-22 13:45:27,478 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-22 13:45:27,773 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 133 treesize of output 85 [2024-11-22 13:45:27,914 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-22 13:45:27,915 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-22 13:45:28,343 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-22 13:45:28,344 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 166 treesize of output 94 [2024-11-22 13:45:28,511 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-22 13:45:28,512 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [242622366] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-22 13:45:28,512 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-22 13:45:28,512 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11, 10] total 26 [2024-11-22 13:45:28,512 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1223045458] [2024-11-22 13:45:28,512 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-22 13:45:28,512 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2024-11-22 13:45:28,513 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 13:45:28,513 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2024-11-22 13:45:28,513 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=562, Unknown=0, NotChecked=0, Total=650 [2024-11-22 13:45:28,513 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 36 [2024-11-22 13:45:28,514 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 185 places, 398 transitions, 3707 flow. Second operand has 26 states, 26 states have (on average 7.038461538461538) internal successors, (183), 26 states have internal predecessors, (183), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-22 13:45:28,514 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-22 13:45:28,514 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 36 [2024-11-22 13:45:28,514 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-22 13:45:39,577 INFO L124 PetriNetUnfolderBase]: 32548/47402 cut-off events. [2024-11-22 13:45:39,577 INFO L125 PetriNetUnfolderBase]: For 1591279/1591279 co-relation queries the response was YES. [2024-11-22 13:45:40,106 INFO L83 FinitePrefix]: Finished finitePrefix Result has 324786 conditions, 47402 events. 32548/47402 cut-off events. For 1591279/1591279 co-relation queries the response was YES. Maximal size of possible extension queue 1568. Compared 313270 event pairs, 6241 based on Foata normal form. 11/47413 useless extension candidates. Maximal degree in co-relation 324717. Up to 10101 conditions per place. [2024-11-22 13:45:40,325 INFO L140 encePairwiseOnDemand]: 24/36 looper letters, 618 selfloop transitions, 526 changer transitions 115/1260 dead transitions. [2024-11-22 13:45:40,325 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 244 places, 1260 transitions, 16359 flow [2024-11-22 13:45:40,326 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2024-11-22 13:45:40,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2024-11-22 13:45:40,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 821 transitions. [2024-11-22 13:45:40,328 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.3800925925925926 [2024-11-22 13:45:40,328 INFO L175 Difference]: Start difference. First operand has 185 places, 398 transitions, 3707 flow. Second operand 60 states and 821 transitions. [2024-11-22 13:45:40,328 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 244 places, 1260 transitions, 16359 flow [2024-11-22 13:45:50,402 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 240 places, 1260 transitions, 15222 flow, removed 505 selfloop flow, removed 4 redundant places. [2024-11-22 13:45:50,413 INFO L231 Difference]: Finished difference. Result has 276 places, 711 transitions, 8958 flow [2024-11-22 13:45:50,414 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=36, PETRI_DIFFERENCE_MINUEND_FLOW=3321, PETRI_DIFFERENCE_MINUEND_PLACES=181, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=398, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=225, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=133, PETRI_DIFFERENCE_SUBTRAHEND_STATES=60, PETRI_FLOW=8958, PETRI_PLACES=276, PETRI_TRANSITIONS=711} [2024-11-22 13:45:50,418 INFO L277 CegarLoopForPetriNet]: 35 programPoint places, 241 predicate places. [2024-11-22 13:45:50,419 INFO L471 AbstractCegarLoop]: Abstraction has has 276 places, 711 transitions, 8958 flow [2024-11-22 13:45:50,419 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 7.038461538461538) internal successors, (183), 26 states have internal predecessors, (183), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-22 13:45:50,419 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-22 13:45:50,419 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, 1, 1, 1, 1, 1, 1, 1] [2024-11-22 13:45:50,426 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2024-11-22 13:45:50,619 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 13:45:50,620 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-11-22 13:45:50,620 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 13:45:50,620 INFO L85 PathProgramCache]: Analyzing trace with hash 1670844169, now seen corresponding path program 4 times [2024-11-22 13:45:50,620 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 13:45:50,620 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [194524883] [2024-11-22 13:45:50,620 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-22 13:45:50,620 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 13:45:50,659 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-22 13:45:50,659 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-22 13:45:51,358 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-22 13:45:51,358 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 13:45:51,358 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [194524883] [2024-11-22 13:45:51,359 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [194524883] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-22 13:45:51,359 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [876082076] [2024-11-22 13:45:51,359 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-22 13:45:51,359 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 13:45:51,359 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-22 13:45:51,361 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-22 13:45:51,362 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-22 13:45:51,453 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-22 13:45:51,453 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-22 13:45:51,455 INFO L255 TraceCheckSpWp]: Trace formula consists of 255 conjuncts, 29 conjuncts are in the unsatisfiable core [2024-11-22 13:45:51,460 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-22 13:45:51,633 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 148 treesize of output 96 [2024-11-22 13:45:52,029 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-22 13:45:52,029 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-22 13:45:52,713 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-22 13:45:52,713 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 102 treesize of output 62 [2024-11-22 13:45:52,854 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-22 13:45:52,854 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [876082076] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-22 13:45:52,855 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-22 13:45:52,855 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10, 10] total 26 [2024-11-22 13:45:52,855 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [645602081] [2024-11-22 13:45:52,855 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-22 13:45:52,855 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2024-11-22 13:45:52,857 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 13:45:52,857 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2024-11-22 13:45:52,857 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=570, Unknown=0, NotChecked=0, Total=650 [2024-11-22 13:45:52,858 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 36 [2024-11-22 13:45:52,858 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 276 places, 711 transitions, 8958 flow. Second operand has 26 states, 26 states have (on average 7.115384615384615) internal successors, (185), 26 states have internal predecessors, (185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-22 13:45:52,858 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-22 13:45:52,858 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 36 [2024-11-22 13:45:52,858 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-22 13:46:07,195 INFO L124 PetriNetUnfolderBase]: 37580/55047 cut-off events. [2024-11-22 13:46:07,195 INFO L125 PetriNetUnfolderBase]: For 3424668/3424668 co-relation queries the response was YES. [2024-11-22 13:46:08,331 INFO L83 FinitePrefix]: Finished finitePrefix Result has 456743 conditions, 55047 events. 37580/55047 cut-off events. For 3424668/3424668 co-relation queries the response was YES. Maximal size of possible extension queue 1856. Compared 376742 event pairs, 11092 based on Foata normal form. 5/55052 useless extension candidates. Maximal degree in co-relation 456638. Up to 20116 conditions per place. [2024-11-22 13:46:08,745 INFO L140 encePairwiseOnDemand]: 24/36 looper letters, 632 selfloop transitions, 583 changer transitions 68/1284 dead transitions. [2024-11-22 13:46:08,745 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 306 places, 1284 transitions, 20516 flow [2024-11-22 13:46:08,745 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2024-11-22 13:46:08,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2024-11-22 13:46:08,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 549 transitions. [2024-11-22 13:46:08,747 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.391025641025641 [2024-11-22 13:46:08,747 INFO L175 Difference]: Start difference. First operand has 276 places, 711 transitions, 8958 flow. Second operand 39 states and 549 transitions. [2024-11-22 13:46:08,747 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 306 places, 1284 transitions, 20516 flow