./Ultimate.py --spec /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/properties/unreach-call.prp --file /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/popl20-min-max-dec.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version a046e57d 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 /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/popl20-min-max-dec.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 67ced8cbf918778cce3ae5cae291c50696df3950945fdf68713903c29ac269e1 --- Real Ultimate output --- This is Ultimate 0.2.5-tmp.dk.eval-mul-div-a046e57-m [2024-10-13 07:12:06,255 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-10-13 07:12:06,310 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-10-13 07:12:06,315 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-10-13 07:12:06,315 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-10-13 07:12:06,342 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-10-13 07:12:06,343 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-10-13 07:12:06,343 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-10-13 07:12:06,344 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-10-13 07:12:06,345 INFO L153 SettingsManager]: * Use memory slicer=true [2024-10-13 07:12:06,345 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-10-13 07:12:06,345 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-10-13 07:12:06,346 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-10-13 07:12:06,347 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-10-13 07:12:06,348 INFO L153 SettingsManager]: * Use SBE=true [2024-10-13 07:12:06,348 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-10-13 07:12:06,348 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-10-13 07:12:06,348 INFO L153 SettingsManager]: * sizeof long=4 [2024-10-13 07:12:06,349 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-10-13 07:12:06,349 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-10-13 07:12:06,349 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-10-13 07:12:06,352 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-10-13 07:12:06,352 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-10-13 07:12:06,352 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-10-13 07:12:06,353 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-10-13 07:12:06,353 INFO L153 SettingsManager]: * sizeof long double=12 [2024-10-13 07:12:06,353 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-10-13 07:12:06,353 INFO L153 SettingsManager]: * Use constant arrays=true [2024-10-13 07:12:06,354 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-10-13 07:12:06,354 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-10-13 07:12:06,354 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-10-13 07:12:06,354 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-10-13 07:12:06,354 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-13 07:12:06,355 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-10-13 07:12:06,355 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-10-13 07:12:06,355 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-10-13 07:12:06,355 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-10-13 07:12:06,355 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-10-13 07:12:06,356 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-10-13 07:12:06,357 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-10-13 07:12:06,366 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-10-13 07:12:06,366 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-10-13 07:12:06,367 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 67ced8cbf918778cce3ae5cae291c50696df3950945fdf68713903c29ac269e1 [2024-10-13 07:12:06,585 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-10-13 07:12:06,610 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-10-13 07:12:06,613 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-10-13 07:12:06,614 INFO L270 PluginConnector]: Initializing CDTParser... [2024-10-13 07:12:06,614 INFO L274 PluginConnector]: CDTParser initialized [2024-10-13 07:12:06,615 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/popl20-min-max-dec.wvr.c [2024-10-13 07:12:07,849 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-10-13 07:12:08,027 INFO L384 CDTParser]: Found 1 translation units. [2024-10-13 07:12:08,029 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/popl20-min-max-dec.wvr.c [2024-10-13 07:12:08,037 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ece289e5a/d3a732d818bb4a3c9a941d47764ee432/FLAGee9971893 [2024-10-13 07:12:08,415 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ece289e5a/d3a732d818bb4a3c9a941d47764ee432 [2024-10-13 07:12:08,417 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-10-13 07:12:08,418 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-10-13 07:12:08,424 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-10-13 07:12:08,424 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-10-13 07:12:08,428 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-10-13 07:12:08,429 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 07:12:08" (1/1) ... [2024-10-13 07:12:08,429 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@66231256 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:12:08, skipping insertion in model container [2024-10-13 07:12:08,430 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 07:12:08" (1/1) ... [2024-10-13 07:12:08,448 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-10-13 07:12:08,627 WARN L248 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/popl20-min-max-dec.wvr.c[3071,3084] [2024-10-13 07:12:08,633 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-13 07:12:08,640 INFO L200 MainTranslator]: Completed pre-run [2024-10-13 07:12:08,656 WARN L248 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/popl20-min-max-dec.wvr.c[3071,3084] [2024-10-13 07:12:08,668 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-13 07:12:08,683 INFO L204 MainTranslator]: Completed translation [2024-10-13 07:12:08,684 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:12:08 WrapperNode [2024-10-13 07:12:08,684 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-10-13 07:12:08,685 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-10-13 07:12:08,685 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-10-13 07:12:08,685 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-10-13 07:12:08,690 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:12:08" (1/1) ... [2024-10-13 07:12:08,698 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:12:08" (1/1) ... [2024-10-13 07:12:08,716 INFO L138 Inliner]: procedures = 25, calls = 43, calls flagged for inlining = 8, calls inlined = 8, statements flattened = 117 [2024-10-13 07:12:08,717 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-10-13 07:12:08,717 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-10-13 07:12:08,718 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-10-13 07:12:08,718 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-10-13 07:12:08,727 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:12:08" (1/1) ... [2024-10-13 07:12:08,727 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:12:08" (1/1) ... [2024-10-13 07:12:08,730 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:12:08" (1/1) ... [2024-10-13 07:12:08,745 INFO L175 MemorySlicer]: Split 12 memory accesses to 2 slices as follows [2, 10]. 83 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0]. The 2 writes are split as follows [0, 2]. [2024-10-13 07:12:08,746 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:12:08" (1/1) ... [2024-10-13 07:12:08,746 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:12:08" (1/1) ... [2024-10-13 07:12:08,752 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:12:08" (1/1) ... [2024-10-13 07:12:08,755 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:12:08" (1/1) ... [2024-10-13 07:12:08,757 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:12:08" (1/1) ... [2024-10-13 07:12:08,758 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:12:08" (1/1) ... [2024-10-13 07:12:08,760 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-10-13 07:12:08,761 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-10-13 07:12:08,761 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-10-13 07:12:08,761 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-10-13 07:12:08,762 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:12:08" (1/1) ... [2024-10-13 07:12:08,769 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-13 07:12:08,781 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-13 07:12:08,793 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) [2024-10-13 07:12:08,795 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 [2024-10-13 07:12:08,828 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-10-13 07:12:08,828 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2024-10-13 07:12:08,829 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2024-10-13 07:12:08,829 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2024-10-13 07:12:08,829 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2024-10-13 07:12:08,829 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2024-10-13 07:12:08,829 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2024-10-13 07:12:08,829 INFO L130 BoogieDeclarations]: Found specification of procedure thread4 [2024-10-13 07:12:08,829 INFO L138 BoogieDeclarations]: Found implementation of procedure thread4 [2024-10-13 07:12:08,829 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-10-13 07:12:08,829 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-10-13 07:12:08,829 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-10-13 07:12:08,829 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-10-13 07:12:08,829 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-10-13 07:12:08,830 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-10-13 07:12:08,830 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-10-13 07:12:08,830 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-10-13 07:12:08,830 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-10-13 07:12:08,830 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-10-13 07:12:08,831 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-10-13 07:12:08,832 WARN L207 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2024-10-13 07:12:08,937 INFO L238 CfgBuilder]: Building ICFG [2024-10-13 07:12:08,938 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-10-13 07:12:09,214 INFO L283 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2024-10-13 07:12:09,214 INFO L287 CfgBuilder]: Performing block encoding [2024-10-13 07:12:09,452 INFO L309 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-10-13 07:12:09,453 INFO L314 CfgBuilder]: Removed 4 assume(true) statements. [2024-10-13 07:12:09,453 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 07:12:09 BoogieIcfgContainer [2024-10-13 07:12:09,453 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-10-13 07:12:09,456 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-10-13 07:12:09,457 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-10-13 07:12:09,460 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-10-13 07:12:09,461 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 07:12:08" (1/3) ... [2024-10-13 07:12:09,462 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7279c1af and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 07:12:09, skipping insertion in model container [2024-10-13 07:12:09,462 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:12:08" (2/3) ... [2024-10-13 07:12:09,462 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7279c1af and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 07:12:09, skipping insertion in model container [2024-10-13 07:12:09,463 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 07:12:09" (3/3) ... [2024-10-13 07:12:09,465 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-min-max-dec.wvr.c [2024-10-13 07:12:09,482 INFO L209 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-10-13 07:12:09,482 INFO L149 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-10-13 07:12:09,482 INFO L484 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-10-13 07:12:09,538 INFO L143 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2024-10-13 07:12:09,573 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 55 places, 46 transitions, 120 flow [2024-10-13 07:12:09,600 INFO L124 PetriNetUnfolderBase]: 4/42 cut-off events. [2024-10-13 07:12:09,601 INFO L125 PetriNetUnfolderBase]: For 4/4 co-relation queries the response was YES. [2024-10-13 07:12:09,604 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59 conditions, 42 events. 4/42 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 89 event pairs, 0 based on Foata normal form. 0/37 useless extension candidates. Maximal degree in co-relation 37. Up to 2 conditions per place. [2024-10-13 07:12:09,604 INFO L82 GeneralOperation]: Start removeDead. Operand has 55 places, 46 transitions, 120 flow [2024-10-13 07:12:09,606 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 50 places, 41 transitions, 106 flow [2024-10-13 07:12:09,613 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-10-13 07:12:09,620 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;@53a45b3, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-10-13 07:12:09,620 INFO L334 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2024-10-13 07:12:09,632 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-10-13 07:12:09,632 INFO L124 PetriNetUnfolderBase]: 4/40 cut-off events. [2024-10-13 07:12:09,632 INFO L125 PetriNetUnfolderBase]: For 4/4 co-relation queries the response was YES. [2024-10-13 07:12:09,632 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-13 07:12:09,633 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, 1, 1, 1, 1, 1] [2024-10-13 07:12:09,633 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 2 more)] === [2024-10-13 07:12:09,637 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 07:12:09,637 INFO L85 PathProgramCache]: Analyzing trace with hash -1137501502, now seen corresponding path program 1 times [2024-10-13 07:12:09,644 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 07:12:09,645 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1093236305] [2024-10-13 07:12:09,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 07:12:09,645 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 07:12:09,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 07:12:10,012 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 07:12:10,012 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 07:12:10,013 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1093236305] [2024-10-13 07:12:10,013 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1093236305] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-13 07:12:10,014 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-13 07:12:10,014 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-10-13 07:12:10,015 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [28406613] [2024-10-13 07:12:10,015 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-13 07:12:10,022 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-10-13 07:12:10,026 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 07:12:10,044 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-10-13 07:12:10,045 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-10-13 07:12:10,054 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 46 [2024-10-13 07:12:10,056 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 41 transitions, 106 flow. Second operand has 4 states, 4 states have (on average 21.5) internal successors, (86), 4 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 07:12:10,056 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-13 07:12:10,056 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 46 [2024-10-13 07:12:10,057 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-13 07:12:10,575 INFO L124 PetriNetUnfolderBase]: 3361/4866 cut-off events. [2024-10-13 07:12:10,575 INFO L125 PetriNetUnfolderBase]: For 267/267 co-relation queries the response was YES. [2024-10-13 07:12:10,585 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9703 conditions, 4866 events. 3361/4866 cut-off events. For 267/267 co-relation queries the response was YES. Maximal size of possible extension queue 282. Compared 28316 event pairs, 1583 based on Foata normal form. 162/4816 useless extension candidates. Maximal degree in co-relation 9085. Up to 2990 conditions per place. [2024-10-13 07:12:10,606 INFO L140 encePairwiseOnDemand]: 42/46 looper letters, 42 selfloop transitions, 3 changer transitions 0/57 dead transitions. [2024-10-13 07:12:10,606 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 57 transitions, 237 flow [2024-10-13 07:12:10,607 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-10-13 07:12:10,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-10-13 07:12:10,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 110 transitions. [2024-10-13 07:12:10,618 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5978260869565217 [2024-10-13 07:12:10,619 INFO L175 Difference]: Start difference. First operand has 50 places, 41 transitions, 106 flow. Second operand 4 states and 110 transitions. [2024-10-13 07:12:10,620 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 57 transitions, 237 flow [2024-10-13 07:12:10,628 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 57 transitions, 215 flow, removed 0 selfloop flow, removed 8 redundant places. [2024-10-13 07:12:10,631 INFO L231 Difference]: Finished difference. Result has 46 places, 42 transitions, 104 flow [2024-10-13 07:12:10,633 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=90, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=104, PETRI_PLACES=46, PETRI_TRANSITIONS=42} [2024-10-13 07:12:10,637 INFO L277 CegarLoopForPetriNet]: 50 programPoint places, -4 predicate places. [2024-10-13 07:12:10,639 INFO L471 AbstractCegarLoop]: Abstraction has has 46 places, 42 transitions, 104 flow [2024-10-13 07:12:10,640 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 21.5) internal successors, (86), 4 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 07:12:10,640 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-13 07:12:10,640 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, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-13 07:12:10,640 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-10-13 07:12:10,641 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 2 more)] === [2024-10-13 07:12:10,641 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 07:12:10,642 INFO L85 PathProgramCache]: Analyzing trace with hash -66851015, now seen corresponding path program 1 times [2024-10-13 07:12:10,642 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 07:12:10,643 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [309809752] [2024-10-13 07:12:10,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 07:12:10,643 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 07:12:10,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 07:12:10,751 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-13 07:12:10,751 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 07:12:10,752 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [309809752] [2024-10-13 07:12:10,752 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [309809752] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-13 07:12:10,752 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-13 07:12:10,752 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-10-13 07:12:10,752 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [788274896] [2024-10-13 07:12:10,752 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-13 07:12:10,753 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-10-13 07:12:10,753 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 07:12:10,754 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-10-13 07:12:10,754 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-10-13 07:12:10,762 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 46 [2024-10-13 07:12:10,762 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 42 transitions, 104 flow. Second operand has 4 states, 4 states have (on average 21.25) internal successors, (85), 4 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 07:12:10,762 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-13 07:12:10,762 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 46 [2024-10-13 07:12:10,762 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-13 07:12:11,219 INFO L124 PetriNetUnfolderBase]: 4370/6365 cut-off events. [2024-10-13 07:12:11,220 INFO L125 PetriNetUnfolderBase]: For 1112/1112 co-relation queries the response was YES. [2024-10-13 07:12:11,226 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13521 conditions, 6365 events. 4370/6365 cut-off events. For 1112/1112 co-relation queries the response was YES. Maximal size of possible extension queue 328. Compared 37204 event pairs, 2417 based on Foata normal form. 192/6379 useless extension candidates. Maximal degree in co-relation 2091. Up to 4205 conditions per place. [2024-10-13 07:12:11,252 INFO L140 encePairwiseOnDemand]: 42/46 looper letters, 47 selfloop transitions, 3 changer transitions 0/61 dead transitions. [2024-10-13 07:12:11,253 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 61 transitions, 255 flow [2024-10-13 07:12:11,253 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-10-13 07:12:11,253 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-10-13 07:12:11,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 109 transitions. [2024-10-13 07:12:11,254 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.592391304347826 [2024-10-13 07:12:11,254 INFO L175 Difference]: Start difference. First operand has 46 places, 42 transitions, 104 flow. Second operand 4 states and 109 transitions. [2024-10-13 07:12:11,254 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 49 places, 61 transitions, 255 flow [2024-10-13 07:12:11,257 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 61 transitions, 249 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-10-13 07:12:11,259 INFO L231 Difference]: Finished difference. Result has 48 places, 43 transitions, 114 flow [2024-10-13 07:12:11,259 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=100, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=114, PETRI_PLACES=48, PETRI_TRANSITIONS=43} [2024-10-13 07:12:11,260 INFO L277 CegarLoopForPetriNet]: 50 programPoint places, -2 predicate places. [2024-10-13 07:12:11,260 INFO L471 AbstractCegarLoop]: Abstraction has has 48 places, 43 transitions, 114 flow [2024-10-13 07:12:11,260 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 21.25) internal successors, (85), 4 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 07:12:11,261 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-13 07:12:11,261 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-13 07:12:11,261 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-10-13 07:12:11,262 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 2 more)] === [2024-10-13 07:12:11,263 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 07:12:11,263 INFO L85 PathProgramCache]: Analyzing trace with hash 319106967, now seen corresponding path program 1 times [2024-10-13 07:12:11,264 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 07:12:11,264 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2050311116] [2024-10-13 07:12:11,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 07:12:11,264 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 07:12:11,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 07:12:11,376 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-13 07:12:11,377 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 07:12:11,377 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2050311116] [2024-10-13 07:12:11,377 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2050311116] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-13 07:12:11,377 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-13 07:12:11,377 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-10-13 07:12:11,377 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1932644576] [2024-10-13 07:12:11,377 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-13 07:12:11,378 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-10-13 07:12:11,378 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 07:12:11,378 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-10-13 07:12:11,378 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-10-13 07:12:11,387 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 46 [2024-10-13 07:12:11,388 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 48 places, 43 transitions, 114 flow. Second operand has 4 states, 4 states have (on average 21.75) internal successors, (87), 4 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 07:12:11,388 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-13 07:12:11,388 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 46 [2024-10-13 07:12:11,389 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-13 07:12:11,880 INFO L124 PetriNetUnfolderBase]: 4947/7209 cut-off events. [2024-10-13 07:12:11,881 INFO L125 PetriNetUnfolderBase]: For 1480/1745 co-relation queries the response was YES. [2024-10-13 07:12:11,887 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16318 conditions, 7209 events. 4947/7209 cut-off events. For 1480/1745 co-relation queries the response was YES. Maximal size of possible extension queue 328. Compared 42544 event pairs, 2918 based on Foata normal form. 505/7589 useless extension candidates. Maximal degree in co-relation 4322. Up to 4773 conditions per place. [2024-10-13 07:12:11,912 INFO L140 encePairwiseOnDemand]: 42/46 looper letters, 48 selfloop transitions, 3 changer transitions 0/62 dead transitions. [2024-10-13 07:12:11,912 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 51 places, 62 transitions, 272 flow [2024-10-13 07:12:11,913 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-10-13 07:12:11,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-10-13 07:12:11,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 108 transitions. [2024-10-13 07:12:11,915 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5869565217391305 [2024-10-13 07:12:11,916 INFO L175 Difference]: Start difference. First operand has 48 places, 43 transitions, 114 flow. Second operand 4 states and 108 transitions. [2024-10-13 07:12:11,916 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 51 places, 62 transitions, 272 flow [2024-10-13 07:12:11,917 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 62 transitions, 267 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-10-13 07:12:11,919 INFO L231 Difference]: Finished difference. Result has 50 places, 44 transitions, 124 flow [2024-10-13 07:12:11,919 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=110, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=124, PETRI_PLACES=50, PETRI_TRANSITIONS=44} [2024-10-13 07:12:11,920 INFO L277 CegarLoopForPetriNet]: 50 programPoint places, 0 predicate places. [2024-10-13 07:12:11,921 INFO L471 AbstractCegarLoop]: Abstraction has has 50 places, 44 transitions, 124 flow [2024-10-13 07:12:11,921 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 21.75) internal successors, (87), 4 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 07:12:11,921 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-13 07:12:11,922 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-13 07:12:11,922 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-10-13 07:12:11,922 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 2 more)] === [2024-10-13 07:12:11,922 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 07:12:11,922 INFO L85 PathProgramCache]: Analyzing trace with hash 1683890689, now seen corresponding path program 1 times [2024-10-13 07:12:11,923 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 07:12:11,923 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1259072529] [2024-10-13 07:12:11,923 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 07:12:11,923 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 07:12:11,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 07:12:12,004 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-10-13 07:12:12,005 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 07:12:12,005 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1259072529] [2024-10-13 07:12:12,006 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1259072529] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-13 07:12:12,006 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-13 07:12:12,006 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-10-13 07:12:12,007 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1586386955] [2024-10-13 07:12:12,007 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-13 07:12:12,007 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-13 07:12:12,008 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 07:12:12,009 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-13 07:12:12,009 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-13 07:12:12,009 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 46 [2024-10-13 07:12:12,010 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 44 transitions, 124 flow. Second operand has 3 states, 3 states have (on average 25.333333333333332) internal successors, (76), 3 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 07:12:12,010 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-13 07:12:12,010 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 46 [2024-10-13 07:12:12,010 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-13 07:12:12,431 INFO L124 PetriNetUnfolderBase]: 4245/6149 cut-off events. [2024-10-13 07:12:12,431 INFO L125 PetriNetUnfolderBase]: For 1656/2112 co-relation queries the response was YES. [2024-10-13 07:12:12,438 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14705 conditions, 6149 events. 4245/6149 cut-off events. For 1656/2112 co-relation queries the response was YES. Maximal size of possible extension queue 299. Compared 35908 event pairs, 3544 based on Foata normal form. 456/6493 useless extension candidates. Maximal degree in co-relation 4137. Up to 5716 conditions per place. [2024-10-13 07:12:12,462 INFO L140 encePairwiseOnDemand]: 43/46 looper letters, 31 selfloop transitions, 2 changer transitions 0/45 dead transitions. [2024-10-13 07:12:12,462 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 52 places, 45 transitions, 192 flow [2024-10-13 07:12:12,462 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-13 07:12:12,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-10-13 07:12:12,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 79 transitions. [2024-10-13 07:12:12,463 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.572463768115942 [2024-10-13 07:12:12,463 INFO L175 Difference]: Start difference. First operand has 50 places, 44 transitions, 124 flow. Second operand 3 states and 79 transitions. [2024-10-13 07:12:12,464 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 52 places, 45 transitions, 192 flow [2024-10-13 07:12:12,465 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 45 transitions, 188 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-10-13 07:12:12,466 INFO L231 Difference]: Finished difference. Result has 51 places, 45 transitions, 132 flow [2024-10-13 07:12:12,466 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=120, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=132, PETRI_PLACES=51, PETRI_TRANSITIONS=45} [2024-10-13 07:12:12,467 INFO L277 CegarLoopForPetriNet]: 50 programPoint places, 1 predicate places. [2024-10-13 07:12:12,467 INFO L471 AbstractCegarLoop]: Abstraction has has 51 places, 45 transitions, 132 flow [2024-10-13 07:12:12,467 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 25.333333333333332) internal successors, (76), 3 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 07:12:12,467 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-13 07:12:12,467 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-13 07:12:12,468 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-10-13 07:12:12,468 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 2 more)] === [2024-10-13 07:12:12,468 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 07:12:12,468 INFO L85 PathProgramCache]: Analyzing trace with hash -1659799412, now seen corresponding path program 1 times [2024-10-13 07:12:12,468 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 07:12:12,469 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [207607234] [2024-10-13 07:12:12,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 07:12:12,469 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 07:12:12,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 07:12:13,011 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-13 07:12:13,012 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 07:12:13,012 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [207607234] [2024-10-13 07:12:13,012 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [207607234] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-13 07:12:13,012 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1847983459] [2024-10-13 07:12:13,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 07:12:13,013 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 07:12:13,013 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-13 07:12:13,015 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) [2024-10-13 07:12:13,016 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-10-13 07:12:13,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 07:12:13,109 INFO L255 TraceCheckSpWp]: Trace formula consists of 238 conjuncts, 25 conjuncts are in the unsatisfiable core [2024-10-13 07:12:13,115 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-13 07:12:13,163 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-10-13 07:12:13,334 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 15 treesize of output 7 [2024-10-13 07:12:13,419 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 07:12:13,420 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-13 07:12:13,771 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-13 07:12:13,772 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1847983459] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-13 07:12:13,772 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-13 07:12:13,772 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 11, 8] total 22 [2024-10-13 07:12:13,772 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [958701071] [2024-10-13 07:12:13,772 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-13 07:12:13,773 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2024-10-13 07:12:13,773 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 07:12:13,773 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2024-10-13 07:12:13,774 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=370, Unknown=0, NotChecked=0, Total=462 [2024-10-13 07:12:13,818 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 46 [2024-10-13 07:12:13,818 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 45 transitions, 132 flow. Second operand has 22 states, 22 states have (on average 17.181818181818183) internal successors, (378), 22 states have internal predecessors, (378), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 07:12:13,818 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-13 07:12:13,818 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 46 [2024-10-13 07:12:13,818 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-13 07:12:23,906 INFO L124 PetriNetUnfolderBase]: 93321/133930 cut-off events. [2024-10-13 07:12:23,907 INFO L125 PetriNetUnfolderBase]: For 43324/43324 co-relation queries the response was YES. [2024-10-13 07:12:24,144 INFO L83 FinitePrefix]: Finished finitePrefix Result has 317895 conditions, 133930 events. 93321/133930 cut-off events. For 43324/43324 co-relation queries the response was YES. Maximal size of possible extension queue 5030. Compared 1032485 event pairs, 2188 based on Foata normal form. 21/133945 useless extension candidates. Maximal degree in co-relation 317881. Up to 19187 conditions per place. [2024-10-13 07:12:24,409 INFO L140 encePairwiseOnDemand]: 32/46 looper letters, 614 selfloop transitions, 118 changer transitions 735/1476 dead transitions. [2024-10-13 07:12:24,409 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 138 places, 1476 transitions, 7447 flow [2024-10-13 07:12:24,409 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 88 states. [2024-10-13 07:12:24,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2024-10-13 07:12:24,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 2514 transitions. [2024-10-13 07:12:24,420 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6210474308300395 [2024-10-13 07:12:24,423 INFO L175 Difference]: Start difference. First operand has 51 places, 45 transitions, 132 flow. Second operand 88 states and 2514 transitions. [2024-10-13 07:12:24,423 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 138 places, 1476 transitions, 7447 flow [2024-10-13 07:12:24,916 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 137 places, 1476 transitions, 7443 flow, removed 1 selfloop flow, removed 1 redundant places. [2024-10-13 07:12:24,925 INFO L231 Difference]: Finished difference. Result has 210 places, 186 transitions, 1186 flow [2024-10-13 07:12:24,925 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=128, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=88, PETRI_FLOW=1186, PETRI_PLACES=210, PETRI_TRANSITIONS=186} [2024-10-13 07:12:24,926 INFO L277 CegarLoopForPetriNet]: 50 programPoint places, 160 predicate places. [2024-10-13 07:12:24,926 INFO L471 AbstractCegarLoop]: Abstraction has has 210 places, 186 transitions, 1186 flow [2024-10-13 07:12:24,926 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 17.181818181818183) internal successors, (378), 22 states have internal predecessors, (378), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 07:12:24,927 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-13 07:12:24,927 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-13 07:12:24,942 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-10-13 07:12:25,131 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 07:12:25,132 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 2 more)] === [2024-10-13 07:12:25,133 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 07:12:25,133 INFO L85 PathProgramCache]: Analyzing trace with hash 831420880, now seen corresponding path program 2 times [2024-10-13 07:12:25,133 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 07:12:25,133 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1695919950] [2024-10-13 07:12:25,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 07:12:25,133 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 07:12:25,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 07:12:25,297 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-10-13 07:12:25,298 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 07:12:25,298 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1695919950] [2024-10-13 07:12:25,298 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1695919950] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-13 07:12:25,298 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-13 07:12:25,298 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-10-13 07:12:25,298 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [947797447] [2024-10-13 07:12:25,298 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-13 07:12:25,299 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-10-13 07:12:25,299 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 07:12:25,299 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-10-13 07:12:25,301 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-10-13 07:12:25,305 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 46 [2024-10-13 07:12:25,305 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 210 places, 186 transitions, 1186 flow. Second operand has 4 states, 4 states have (on average 21.75) internal successors, (87), 4 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 07:12:25,305 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-13 07:12:25,305 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 46 [2024-10-13 07:12:25,305 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-13 07:12:39,620 INFO L124 PetriNetUnfolderBase]: 73036/109441 cut-off events. [2024-10-13 07:12:39,620 INFO L125 PetriNetUnfolderBase]: For 3106923/3108807 co-relation queries the response was YES. [2024-10-13 07:12:40,846 INFO L83 FinitePrefix]: Finished finitePrefix Result has 557062 conditions, 109441 events. 73036/109441 cut-off events. For 3106923/3108807 co-relation queries the response was YES. Maximal size of possible extension queue 3948. Compared 892377 event pairs, 12909 based on Foata normal form. 1443/110626 useless extension candidates. Maximal degree in co-relation 556968. Up to 51864 conditions per place. [2024-10-13 07:12:41,161 INFO L140 encePairwiseOnDemand]: 42/46 looper letters, 160 selfloop transitions, 4 changer transitions 309/496 dead transitions. [2024-10-13 07:12:41,161 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 172 places, 496 transitions, 3880 flow [2024-10-13 07:12:41,162 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-10-13 07:12:41,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-10-13 07:12:41,162 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 147 transitions. [2024-10-13 07:12:41,162 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6391304347826087 [2024-10-13 07:12:41,162 INFO L175 Difference]: Start difference. First operand has 210 places, 186 transitions, 1186 flow. Second operand 5 states and 147 transitions. [2024-10-13 07:12:41,162 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 172 places, 496 transitions, 3880 flow