./Ultimate.py --spec /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/properties/unreach-call.prp --file /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/chl-node-symm.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version fca748b1 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/chl-node-symm.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 9db11e263e78e3a6bd75c2a0c3dda64920ec857df2fbb1d0b7b1072a48f36a31 --- Real Ultimate output --- This is Ultimate 0.2.5-wip.dd.update-z3-fca748b-m [2024-11-20 09:36:15,236 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-20 09:36:15,285 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-11-20 09:36:15,289 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-20 09:36:15,289 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-20 09:36:15,315 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-20 09:36:15,316 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-20 09:36:15,317 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-20 09:36:15,317 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-20 09:36:15,318 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-20 09:36:15,318 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-20 09:36:15,318 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-20 09:36:15,319 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-20 09:36:15,319 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-20 09:36:15,320 INFO L153 SettingsManager]: * Use SBE=true [2024-11-20 09:36:15,321 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-20 09:36:15,321 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-11-20 09:36:15,321 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-20 09:36:15,321 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-20 09:36:15,321 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-20 09:36:15,322 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-20 09:36:15,325 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-11-20 09:36:15,325 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-20 09:36:15,325 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-11-20 09:36:15,325 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-20 09:36:15,325 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-20 09:36:15,326 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-11-20 09:36:15,326 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-20 09:36:15,326 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-20 09:36:15,326 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-20 09:36:15,326 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-20 09:36:15,326 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-20 09:36:15,327 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-20 09:36:15,327 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-20 09:36:15,327 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-20 09:36:15,327 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-11-20 09:36:15,327 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-20 09:36:15,327 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-20 09:36:15,327 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-20 09:36:15,327 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-20 09:36:15,328 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-20 09:36:15,329 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-20 09:36:15,329 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 9db11e263e78e3a6bd75c2a0c3dda64920ec857df2fbb1d0b7b1072a48f36a31 [2024-11-20 09:36:15,522 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-20 09:36:15,545 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-20 09:36:15,547 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-20 09:36:15,547 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-20 09:36:15,548 INFO L274 PluginConnector]: CDTParser initialized [2024-11-20 09:36:15,548 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/chl-node-symm.wvr.c [2024-11-20 09:36:16,802 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-20 09:36:16,950 INFO L384 CDTParser]: Found 1 translation units. [2024-11-20 09:36:16,950 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/chl-node-symm.wvr.c [2024-11-20 09:36:16,957 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a04c0095f/d12454d017c74cdeb75e136c44b41f05/FLAGa93ee809b [2024-11-20 09:36:17,355 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a04c0095f/d12454d017c74cdeb75e136c44b41f05 [2024-11-20 09:36:17,357 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-20 09:36:17,358 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-20 09:36:17,359 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-20 09:36:17,359 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-20 09:36:17,363 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-20 09:36:17,363 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 09:36:17" (1/1) ... [2024-11-20 09:36:17,364 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@caf8525 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:36:17, skipping insertion in model container [2024-11-20 09:36:17,364 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 09:36:17" (1/1) ... [2024-11-20 09:36:17,383 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-20 09:36:17,573 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-node-symm.wvr.c[3331,3344] [2024-11-20 09:36:17,585 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-20 09:36:17,592 INFO L200 MainTranslator]: Completed pre-run [2024-11-20 09:36:17,607 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-node-symm.wvr.c[3331,3344] [2024-11-20 09:36:17,612 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-20 09:36:17,626 INFO L204 MainTranslator]: Completed translation [2024-11-20 09:36:17,627 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:36:17 WrapperNode [2024-11-20 09:36:17,627 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-20 09:36:17,629 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-20 09:36:17,630 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-20 09:36:17,630 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-20 09:36:17,636 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:36:17" (1/1) ... [2024-11-20 09:36:17,652 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:36:17" (1/1) ... [2024-11-20 09:36:17,685 INFO L138 Inliner]: procedures = 25, calls = 40, calls flagged for inlining = 18, calls inlined = 24, statements flattened = 289 [2024-11-20 09:36:17,686 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-20 09:36:17,687 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-20 09:36:17,687 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-20 09:36:17,687 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-20 09:36:17,698 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:36:17" (1/1) ... [2024-11-20 09:36:17,698 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:36:17" (1/1) ... [2024-11-20 09:36:17,702 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:36:17" (1/1) ... [2024-11-20 09:36:17,719 INFO L175 MemorySlicer]: Split 18 memory accesses to 3 slices as follows [2, 6, 10]. 56 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0, 0]. The 4 writes are split as follows [0, 2, 2]. [2024-11-20 09:36:17,719 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:36:17" (1/1) ... [2024-11-20 09:36:17,719 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:36:17" (1/1) ... [2024-11-20 09:36:17,727 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:36:17" (1/1) ... [2024-11-20 09:36:17,731 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:36:17" (1/1) ... [2024-11-20 09:36:17,732 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:36:17" (1/1) ... [2024-11-20 09:36:17,733 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:36:17" (1/1) ... [2024-11-20 09:36:17,736 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-20 09:36:17,737 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-20 09:36:17,737 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-20 09:36:17,737 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-20 09:36:17,738 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:36:17" (1/1) ... [2024-11-20 09:36:17,742 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-20 09:36:17,763 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-20 09:36:17,779 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) [2024-11-20 09:36:17,781 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 [2024-11-20 09:36:17,815 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-20 09:36:17,815 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2024-11-20 09:36:17,815 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2024-11-20 09:36:17,815 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2024-11-20 09:36:17,815 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2024-11-20 09:36:17,815 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-11-20 09:36:17,815 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-11-20 09:36:17,815 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2024-11-20 09:36:17,815 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-11-20 09:36:17,815 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-11-20 09:36:17,815 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2024-11-20 09:36:17,815 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-11-20 09:36:17,816 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-20 09:36:17,816 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-20 09:36:17,816 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-11-20 09:36:17,816 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-11-20 09:36:17,816 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2024-11-20 09:36:17,817 WARN L207 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2024-11-20 09:36:17,910 INFO L238 CfgBuilder]: Building ICFG [2024-11-20 09:36:17,913 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-20 09:36:18,294 INFO L283 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2024-11-20 09:36:18,294 INFO L287 CfgBuilder]: Performing block encoding [2024-11-20 09:36:18,625 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-20 09:36:18,626 INFO L316 CfgBuilder]: Removed 4 assume(true) statements. [2024-11-20 09:36:18,627 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 09:36:18 BoogieIcfgContainer [2024-11-20 09:36:18,627 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-20 09:36:18,629 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-20 09:36:18,630 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-20 09:36:18,632 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-20 09:36:18,633 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.11 09:36:17" (1/3) ... [2024-11-20 09:36:18,633 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@40a0a5b0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 09:36:18, skipping insertion in model container [2024-11-20 09:36:18,634 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:36:17" (2/3) ... [2024-11-20 09:36:18,634 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@40a0a5b0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 09:36:18, skipping insertion in model container [2024-11-20 09:36:18,634 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 09:36:18" (3/3) ... [2024-11-20 09:36:18,635 INFO L112 eAbstractionObserver]: Analyzing ICFG chl-node-symm.wvr.c [2024-11-20 09:36:18,648 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-20 09:36:18,649 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-11-20 09:36:18,649 INFO L489 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-11-20 09:36:18,694 INFO L143 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2024-11-20 09:36:18,721 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 25 places, 22 transitions, 58 flow [2024-11-20 09:36:18,744 INFO L124 PetriNetUnfolderBase]: 4/20 cut-off events. [2024-11-20 09:36:18,745 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-11-20 09:36:18,747 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29 conditions, 20 events. 4/20 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 2. Compared 8 event pairs, 0 based on Foata normal form. 0/15 useless extension candidates. Maximal degree in co-relation 14. Up to 2 conditions per place. [2024-11-20 09:36:18,748 INFO L82 GeneralOperation]: Start removeDead. Operand has 25 places, 22 transitions, 58 flow [2024-11-20 09:36:18,750 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 22 places, 19 transitions, 50 flow [2024-11-20 09:36:18,760 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-20 09:36:18,767 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;@5e4c0f0, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-20 09:36:18,768 INFO L334 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2024-11-20 09:36:18,776 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-11-20 09:36:18,777 INFO L124 PetriNetUnfolderBase]: 4/18 cut-off events. [2024-11-20 09:36:18,777 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-11-20 09:36:18,777 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 09:36:18,778 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-20 09:36:18,778 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-20 09:36:18,782 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 09:36:18,782 INFO L85 PathProgramCache]: Analyzing trace with hash -318978629, now seen corresponding path program 1 times [2024-11-20 09:36:18,790 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 09:36:18,790 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1391272609] [2024-11-20 09:36:18,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 09:36:18,791 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 09:36:18,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 09:36:19,254 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 09:36:19,255 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 09:36:19,255 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1391272609] [2024-11-20 09:36:19,256 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1391272609] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-20 09:36:19,256 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-20 09:36:19,256 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-20 09:36:19,257 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1361741922] [2024-11-20 09:36:19,258 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-20 09:36:19,264 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-20 09:36:19,268 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 09:36:19,289 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-20 09:36:19,290 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-20 09:36:19,291 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2024-11-20 09:36:19,293 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 22 places, 19 transitions, 50 flow. Second operand has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 3 states have internal predecessors, (23), 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) [2024-11-20 09:36:19,293 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 09:36:19,293 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2024-11-20 09:36:19,294 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 09:36:19,353 INFO L124 PetriNetUnfolderBase]: 12/35 cut-off events. [2024-11-20 09:36:19,353 INFO L125 PetriNetUnfolderBase]: For 4/4 co-relation queries the response was YES. [2024-11-20 09:36:19,354 INFO L83 FinitePrefix]: Finished finitePrefix Result has 82 conditions, 35 events. 12/35 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 33 event pairs, 8 based on Foata normal form. 0/31 useless extension candidates. Maximal degree in co-relation 40. Up to 34 conditions per place. [2024-11-20 09:36:19,355 INFO L140 encePairwiseOnDemand]: 19/22 looper letters, 17 selfloop transitions, 2 changer transitions 0/20 dead transitions. [2024-11-20 09:36:19,355 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 24 places, 20 transitions, 90 flow [2024-11-20 09:36:19,356 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-20 09:36:19,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-20 09:36:19,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 29 transitions. [2024-11-20 09:36:19,364 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4393939393939394 [2024-11-20 09:36:19,365 INFO L175 Difference]: Start difference. First operand has 22 places, 19 transitions, 50 flow. Second operand 3 states and 29 transitions. [2024-11-20 09:36:19,366 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 24 places, 20 transitions, 90 flow [2024-11-20 09:36:19,367 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 20 places, 20 transitions, 82 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-11-20 09:36:19,369 INFO L231 Difference]: Finished difference. Result has 21 places, 20 transitions, 54 flow [2024-11-20 09:36:19,371 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=42, PETRI_DIFFERENCE_MINUEND_PLACES=18, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=19, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=17, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=54, PETRI_PLACES=21, PETRI_TRANSITIONS=20} [2024-11-20 09:36:19,374 INFO L277 CegarLoopForPetriNet]: 22 programPoint places, -1 predicate places. [2024-11-20 09:36:19,375 INFO L471 AbstractCegarLoop]: Abstraction has has 21 places, 20 transitions, 54 flow [2024-11-20 09:36:19,375 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 3 states have internal predecessors, (23), 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) [2024-11-20 09:36:19,375 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 09:36:19,375 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-20 09:36:19,375 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-20 09:36:19,376 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-20 09:36:19,376 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 09:36:19,376 INFO L85 PathProgramCache]: Analyzing trace with hash -1630832821, now seen corresponding path program 1 times [2024-11-20 09:36:19,376 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 09:36:19,376 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [38569398] [2024-11-20 09:36:19,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 09:36:19,377 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 09:36:19,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 09:36:19,518 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-20 09:36:19,519 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 09:36:19,519 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [38569398] [2024-11-20 09:36:19,519 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [38569398] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-20 09:36:19,520 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-20 09:36:19,520 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-20 09:36:19,520 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [333374549] [2024-11-20 09:36:19,520 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-20 09:36:19,522 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-20 09:36:19,522 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 09:36:19,523 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-20 09:36:19,523 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-20 09:36:19,523 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2024-11-20 09:36:19,523 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 21 places, 20 transitions, 54 flow. Second operand has 4 states, 4 states have (on average 6.75) internal successors, (27), 4 states have internal predecessors, (27), 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) [2024-11-20 09:36:19,523 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 09:36:19,523 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2024-11-20 09:36:19,523 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 09:36:19,601 INFO L124 PetriNetUnfolderBase]: 12/36 cut-off events. [2024-11-20 09:36:19,602 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-11-20 09:36:19,602 INFO L83 FinitePrefix]: Finished finitePrefix Result has 83 conditions, 36 events. 12/36 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 33 event pairs, 8 based on Foata normal form. 0/32 useless extension candidates. Maximal degree in co-relation 72. Up to 33 conditions per place. [2024-11-20 09:36:19,603 INFO L140 encePairwiseOnDemand]: 17/22 looper letters, 16 selfloop transitions, 4 changer transitions 0/21 dead transitions. [2024-11-20 09:36:19,603 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 24 places, 21 transitions, 96 flow [2024-11-20 09:36:19,603 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-20 09:36:19,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-20 09:36:19,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 33 transitions. [2024-11-20 09:36:19,604 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.375 [2024-11-20 09:36:19,604 INFO L175 Difference]: Start difference. First operand has 21 places, 20 transitions, 54 flow. Second operand 4 states and 33 transitions. [2024-11-20 09:36:19,605 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 24 places, 21 transitions, 96 flow [2024-11-20 09:36:19,605 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 23 places, 21 transitions, 92 flow, removed 1 selfloop flow, removed 1 redundant places. [2024-11-20 09:36:19,606 INFO L231 Difference]: Finished difference. Result has 24 places, 21 transitions, 68 flow [2024-11-20 09:36:19,606 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=50, PETRI_DIFFERENCE_MINUEND_PLACES=20, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=20, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=16, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=68, PETRI_PLACES=24, PETRI_TRANSITIONS=21} [2024-11-20 09:36:19,607 INFO L277 CegarLoopForPetriNet]: 22 programPoint places, 2 predicate places. [2024-11-20 09:36:19,607 INFO L471 AbstractCegarLoop]: Abstraction has has 24 places, 21 transitions, 68 flow [2024-11-20 09:36:19,608 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.75) internal successors, (27), 4 states have internal predecessors, (27), 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) [2024-11-20 09:36:19,608 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 09:36:19,608 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-20 09:36:19,608 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-20 09:36:19,608 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-20 09:36:19,609 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 09:36:19,609 INFO L85 PathProgramCache]: Analyzing trace with hash -563317027, now seen corresponding path program 1 times [2024-11-20 09:36:19,610 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 09:36:19,610 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [946774925] [2024-11-20 09:36:19,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 09:36:19,610 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 09:36:19,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 09:36:19,727 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-20 09:36:19,728 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 09:36:19,728 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [946774925] [2024-11-20 09:36:19,729 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [946774925] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-20 09:36:19,729 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-20 09:36:19,730 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-20 09:36:19,730 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1978588342] [2024-11-20 09:36:19,730 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-20 09:36:19,730 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-20 09:36:19,731 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 09:36:19,731 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-20 09:36:19,732 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-20 09:36:19,732 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2024-11-20 09:36:19,732 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 24 places, 21 transitions, 68 flow. Second operand has 4 states, 4 states have (on average 7.0) internal successors, (28), 4 states have internal predecessors, (28), 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) [2024-11-20 09:36:19,732 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 09:36:19,732 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2024-11-20 09:36:19,732 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 09:36:19,800 INFO L124 PetriNetUnfolderBase]: 12/37 cut-off events. [2024-11-20 09:36:19,801 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-11-20 09:36:19,802 INFO L83 FinitePrefix]: Finished finitePrefix Result has 92 conditions, 37 events. 12/37 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 33 event pairs, 8 based on Foata normal form. 0/34 useless extension candidates. Maximal degree in co-relation 72. Up to 35 conditions per place. [2024-11-20 09:36:19,803 INFO L140 encePairwiseOnDemand]: 18/22 looper letters, 18 selfloop transitions, 3 changer transitions 0/22 dead transitions. [2024-11-20 09:36:19,804 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 27 places, 22 transitions, 112 flow [2024-11-20 09:36:19,804 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-20 09:36:19,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-20 09:36:19,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 32 transitions. [2024-11-20 09:36:19,805 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.36363636363636365 [2024-11-20 09:36:19,805 INFO L175 Difference]: Start difference. First operand has 24 places, 21 transitions, 68 flow. Second operand 4 states and 32 transitions. [2024-11-20 09:36:19,805 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 27 places, 22 transitions, 112 flow [2024-11-20 09:36:19,806 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 26 places, 22 transitions, 111 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-20 09:36:19,806 INFO L231 Difference]: Finished difference. Result has 27 places, 22 transitions, 81 flow [2024-11-20 09:36:19,808 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=67, PETRI_DIFFERENCE_MINUEND_PLACES=23, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=21, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=18, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=81, PETRI_PLACES=27, PETRI_TRANSITIONS=22} [2024-11-20 09:36:19,808 INFO L277 CegarLoopForPetriNet]: 22 programPoint places, 5 predicate places. [2024-11-20 09:36:19,809 INFO L471 AbstractCegarLoop]: Abstraction has has 27 places, 22 transitions, 81 flow [2024-11-20 09:36:19,809 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.0) internal successors, (28), 4 states have internal predecessors, (28), 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) [2024-11-20 09:36:19,810 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 09:36:19,810 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-20 09:36:19,810 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-11-20 09:36:19,810 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-20 09:36:19,810 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 09:36:19,811 INFO L85 PathProgramCache]: Analyzing trace with hash -1455415385, now seen corresponding path program 1 times [2024-11-20 09:36:19,811 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 09:36:19,811 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [752296197] [2024-11-20 09:36:19,811 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 09:36:19,812 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 09:36:19,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 09:36:19,927 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-20 09:36:19,927 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 09:36:19,927 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [752296197] [2024-11-20 09:36:19,928 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [752296197] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-20 09:36:19,928 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-20 09:36:19,928 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-20 09:36:19,928 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [320498852] [2024-11-20 09:36:19,928 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-20 09:36:19,928 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-20 09:36:19,928 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 09:36:19,929 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-20 09:36:19,929 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-20 09:36:19,929 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2024-11-20 09:36:19,929 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 27 places, 22 transitions, 81 flow. Second operand has 4 states, 4 states have (on average 7.25) internal successors, (29), 4 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) [2024-11-20 09:36:19,929 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 09:36:19,929 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2024-11-20 09:36:19,929 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 09:36:19,992 INFO L124 PetriNetUnfolderBase]: 12/38 cut-off events. [2024-11-20 09:36:19,992 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2024-11-20 09:36:19,993 INFO L83 FinitePrefix]: Finished finitePrefix Result has 101 conditions, 38 events. 12/38 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 33 event pairs, 8 based on Foata normal form. 0/36 useless extension candidates. Maximal degree in co-relation 79. Up to 36 conditions per place. [2024-11-20 09:36:19,993 INFO L140 encePairwiseOnDemand]: 18/22 looper letters, 19 selfloop transitions, 3 changer transitions 0/23 dead transitions. [2024-11-20 09:36:19,993 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 30 places, 23 transitions, 127 flow [2024-11-20 09:36:19,993 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-20 09:36:19,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-20 09:36:19,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 32 transitions. [2024-11-20 09:36:19,994 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.36363636363636365 [2024-11-20 09:36:19,994 INFO L175 Difference]: Start difference. First operand has 27 places, 22 transitions, 81 flow. Second operand 4 states and 32 transitions. [2024-11-20 09:36:19,994 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 30 places, 23 transitions, 127 flow [2024-11-20 09:36:19,995 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 28 places, 23 transitions, 121 flow, removed 1 selfloop flow, removed 2 redundant places. [2024-11-20 09:36:19,996 INFO L231 Difference]: Finished difference. Result has 29 places, 23 transitions, 89 flow [2024-11-20 09:36:19,997 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=75, PETRI_DIFFERENCE_MINUEND_PLACES=25, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=22, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=19, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=89, PETRI_PLACES=29, PETRI_TRANSITIONS=23} [2024-11-20 09:36:19,998 INFO L277 CegarLoopForPetriNet]: 22 programPoint places, 7 predicate places. [2024-11-20 09:36:19,999 INFO L471 AbstractCegarLoop]: Abstraction has has 29 places, 23 transitions, 89 flow [2024-11-20 09:36:19,999 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.25) internal successors, (29), 4 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) [2024-11-20 09:36:19,999 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 09:36:19,999 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-20 09:36:19,999 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-11-20 09:36:19,999 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-20 09:36:20,000 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 09:36:20,001 INFO L85 PathProgramCache]: Analyzing trace with hash -242675451, now seen corresponding path program 1 times [2024-11-20 09:36:20,001 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 09:36:20,001 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [113181826] [2024-11-20 09:36:20,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 09:36:20,001 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 09:36:20,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 09:36:21,062 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-20 09:36:21,062 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 09:36:21,062 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [113181826] [2024-11-20 09:36:21,062 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [113181826] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-20 09:36:21,063 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-20 09:36:21,063 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-20 09:36:21,063 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1986072402] [2024-11-20 09:36:21,063 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-20 09:36:21,064 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-20 09:36:21,064 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 09:36:21,065 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-20 09:36:21,065 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-20 09:36:21,065 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2024-11-20 09:36:21,066 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 29 places, 23 transitions, 89 flow. Second operand has 4 states, 4 states have (on average 7.5) internal successors, (30), 4 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 09:36:21,066 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 09:36:21,066 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2024-11-20 09:36:21,066 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 09:36:21,178 INFO L124 PetriNetUnfolderBase]: 11/41 cut-off events. [2024-11-20 09:36:21,179 INFO L125 PetriNetUnfolderBase]: For 4/4 co-relation queries the response was YES. [2024-11-20 09:36:21,179 INFO L83 FinitePrefix]: Finished finitePrefix Result has 111 conditions, 41 events. 11/41 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 56 event pairs, 1 based on Foata normal form. 1/41 useless extension candidates. Maximal degree in co-relation 88. Up to 21 conditions per place. [2024-11-20 09:36:21,179 INFO L140 encePairwiseOnDemand]: 19/22 looper letters, 22 selfloop transitions, 1 changer transitions 6/30 dead transitions. [2024-11-20 09:36:21,179 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 32 places, 30 transitions, 164 flow [2024-11-20 09:36:21,181 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-20 09:36:21,181 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-20 09:36:21,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 38 transitions. [2024-11-20 09:36:21,183 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4318181818181818 [2024-11-20 09:36:21,183 INFO L175 Difference]: Start difference. First operand has 29 places, 23 transitions, 89 flow. Second operand 4 states and 38 transitions. [2024-11-20 09:36:21,183 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 32 places, 30 transitions, 164 flow [2024-11-20 09:36:21,184 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 30 places, 30 transitions, 158 flow, removed 1 selfloop flow, removed 2 redundant places. [2024-11-20 09:36:21,185 INFO L231 Difference]: Finished difference. Result has 32 places, 23 transitions, 90 flow [2024-11-20 09:36:21,186 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=83, PETRI_DIFFERENCE_MINUEND_PLACES=27, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=23, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=90, PETRI_PLACES=32, PETRI_TRANSITIONS=23} [2024-11-20 09:36:21,187 INFO L277 CegarLoopForPetriNet]: 22 programPoint places, 10 predicate places. [2024-11-20 09:36:21,188 INFO L471 AbstractCegarLoop]: Abstraction has has 32 places, 23 transitions, 90 flow [2024-11-20 09:36:21,188 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.5) internal successors, (30), 4 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 09:36:21,188 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 09:36:21,188 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-20 09:36:21,188 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-11-20 09:36:21,188 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-20 09:36:21,188 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 09:36:21,189 INFO L85 PathProgramCache]: Analyzing trace with hash -1168259515, now seen corresponding path program 2 times [2024-11-20 09:36:21,189 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 09:36:21,189 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1099699638] [2024-11-20 09:36:21,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 09:36:21,189 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 09:36:21,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 09:36:21,804 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-20 09:36:21,804 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 09:36:21,805 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1099699638] [2024-11-20 09:36:21,805 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1099699638] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-20 09:36:21,805 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-20 09:36:21,805 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-20 09:36:21,805 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1296782278] [2024-11-20 09:36:21,805 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-20 09:36:21,805 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-20 09:36:21,806 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 09:36:21,806 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-20 09:36:21,806 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-20 09:36:21,806 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2024-11-20 09:36:21,806 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 32 places, 23 transitions, 90 flow. Second operand has 4 states, 4 states have (on average 7.5) internal successors, (30), 4 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 09:36:21,806 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 09:36:21,806 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2024-11-20 09:36:21,806 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 09:36:21,893 INFO L124 PetriNetUnfolderBase]: 9/33 cut-off events. [2024-11-20 09:36:21,894 INFO L125 PetriNetUnfolderBase]: For 14/14 co-relation queries the response was YES. [2024-11-20 09:36:21,894 INFO L83 FinitePrefix]: Finished finitePrefix Result has 103 conditions, 33 events. 9/33 cut-off events. For 14/14 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 30 event pairs, 3 based on Foata normal form. 1/33 useless extension candidates. Maximal degree in co-relation 94. Up to 26 conditions per place. [2024-11-20 09:36:21,894 INFO L140 encePairwiseOnDemand]: 19/22 looper letters, 0 selfloop transitions, 0 changer transitions 25/25 dead transitions. [2024-11-20 09:36:21,894 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 32 places, 25 transitions, 146 flow [2024-11-20 09:36:21,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-20 09:36:21,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-20 09:36:21,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 34 transitions. [2024-11-20 09:36:21,895 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.38636363636363635 [2024-11-20 09:36:21,896 INFO L175 Difference]: Start difference. First operand has 32 places, 23 transitions, 90 flow. Second operand 4 states and 34 transitions. [2024-11-20 09:36:21,896 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 32 places, 25 transitions, 146 flow [2024-11-20 09:36:21,896 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 31 places, 25 transitions, 144 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-20 09:36:21,897 INFO L231 Difference]: Finished difference. Result has 31 places, 0 transitions, 0 flow [2024-11-20 09:36:21,897 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=83, PETRI_DIFFERENCE_MINUEND_PLACES=28, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=21, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=0, PETRI_PLACES=31, PETRI_TRANSITIONS=0} [2024-11-20 09:36:21,897 INFO L277 CegarLoopForPetriNet]: 22 programPoint places, 9 predicate places. [2024-11-20 09:36:21,898 INFO L471 AbstractCegarLoop]: Abstraction has has 31 places, 0 transitions, 0 flow [2024-11-20 09:36:21,898 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.5) internal successors, (30), 4 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 09:36:21,900 INFO L782 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (2 of 3 remaining) [2024-11-20 09:36:21,901 INFO L782 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 3 remaining) [2024-11-20 09:36:21,901 INFO L782 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 3 remaining) [2024-11-20 09:36:21,901 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-11-20 09:36:21,901 INFO L407 BasicCegarLoop]: Path program histogram: [2, 1, 1, 1, 1] [2024-11-20 09:36:21,904 INFO L239 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2024-11-20 09:36:21,904 INFO L170 ceAbstractionStarter]: Computing trace abstraction results [2024-11-20 09:36:21,908 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.11 09:36:21 BasicIcfg [2024-11-20 09:36:21,908 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2024-11-20 09:36:21,909 INFO L112 PluginConnector]: ------------------------Witness Printer---------------------------- [2024-11-20 09:36:21,909 INFO L270 PluginConnector]: Initializing Witness Printer... [2024-11-20 09:36:21,909 INFO L274 PluginConnector]: Witness Printer initialized [2024-11-20 09:36:21,909 INFO L184 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 09:36:18" (3/4) ... [2024-11-20 09:36:21,911 INFO L142 WitnessPrinter]: Generating witness for correct program [2024-11-20 09:36:21,913 INFO L361 RCFGBacktranslator]: Ignoring RootEdge to procedure thread1 [2024-11-20 09:36:21,914 INFO L361 RCFGBacktranslator]: Ignoring RootEdge to procedure thread2 [2024-11-20 09:36:21,921 INFO L925 BoogieBacktranslator]: Reduced CFG by removing 226 nodes and edges [2024-11-20 09:36:21,921 INFO L925 BoogieBacktranslator]: Reduced CFG by removing 34 nodes and edges [2024-11-20 09:36:21,921 INFO L925 BoogieBacktranslator]: Reduced CFG by removing 13 nodes and edges [2024-11-20 09:36:21,922 INFO L925 BoogieBacktranslator]: Reduced CFG by removing 3 nodes and edges [2024-11-20 09:36:22,012 INFO L149 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2024-11-20 09:36:22,012 INFO L149 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.yml [2024-11-20 09:36:22,012 INFO L131 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2024-11-20 09:36:22,013 INFO L158 Benchmark]: Toolchain (without parser) took 4655.12ms. Allocated memory was 151.0MB in the beginning and 276.8MB in the end (delta: 125.8MB). Free memory was 94.3MB in the beginning and 136.4MB in the end (delta: -42.1MB). Peak memory consumption was 83.9MB. Max. memory is 16.1GB. [2024-11-20 09:36:22,013 INFO L158 Benchmark]: CDTParser took 0.10ms. Allocated memory is still 96.5MB. Free memory was 51.5MB in the beginning and 51.4MB in the end (delta: 142.7kB). There was no memory consumed. Max. memory is 16.1GB. [2024-11-20 09:36:22,013 INFO L158 Benchmark]: CACSL2BoogieTranslator took 268.38ms. Allocated memory is still 151.0MB. Free memory was 94.3MB in the beginning and 115.6MB in the end (delta: -21.3MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2024-11-20 09:36:22,014 INFO L158 Benchmark]: Boogie Procedure Inliner took 56.74ms. Allocated memory is still 151.0MB. Free memory was 115.6MB in the beginning and 113.5MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2024-11-20 09:36:22,014 INFO L158 Benchmark]: Boogie Preprocessor took 49.59ms. Allocated memory is still 151.0MB. Free memory was 112.8MB in the beginning and 110.0MB in the end (delta: 2.8MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2024-11-20 09:36:22,014 INFO L158 Benchmark]: RCFGBuilder took 890.68ms. Allocated memory was 151.0MB in the beginning and 190.8MB in the end (delta: 39.8MB). Free memory was 110.0MB in the beginning and 116.5MB in the end (delta: -6.5MB). Peak memory consumption was 71.4MB. Max. memory is 16.1GB. [2024-11-20 09:36:22,015 INFO L158 Benchmark]: TraceAbstraction took 3279.31ms. Allocated memory was 190.8MB in the beginning and 276.8MB in the end (delta: 86.0MB). Free memory was 115.4MB in the beginning and 143.8MB in the end (delta: -28.3MB). Peak memory consumption was 57.6MB. Max. memory is 16.1GB. [2024-11-20 09:36:22,015 INFO L158 Benchmark]: Witness Printer took 103.98ms. Allocated memory is still 276.8MB. Free memory was 143.8MB in the beginning and 136.4MB in the end (delta: 7.3MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2024-11-20 09:36:22,017 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.10ms. Allocated memory is still 96.5MB. Free memory was 51.5MB in the beginning and 51.4MB in the end (delta: 142.7kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 268.38ms. Allocated memory is still 151.0MB. Free memory was 94.3MB in the beginning and 115.6MB in the end (delta: -21.3MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 56.74ms. Allocated memory is still 151.0MB. Free memory was 115.6MB in the beginning and 113.5MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 49.59ms. Allocated memory is still 151.0MB. Free memory was 112.8MB in the beginning and 110.0MB in the end (delta: 2.8MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 890.68ms. Allocated memory was 151.0MB in the beginning and 190.8MB in the end (delta: 39.8MB). Free memory was 110.0MB in the beginning and 116.5MB in the end (delta: -6.5MB). Peak memory consumption was 71.4MB. Max. memory is 16.1GB. * TraceAbstraction took 3279.31ms. Allocated memory was 190.8MB in the beginning and 276.8MB in the end (delta: 86.0MB). Free memory was 115.4MB in the beginning and 143.8MB in the end (delta: -28.3MB). Peak memory consumption was 57.6MB. Max. memory is 16.1GB. * Witness Printer took 103.98ms. Allocated memory is still 276.8MB. Free memory was 143.8MB in the beginning and 136.4MB in the end (delta: 7.3MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 93]: a call to reach_error is unreachable For all program executions holds that a call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 5 procedures, 25 locations, 3 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 0.0s, RemoveRedundantFlowTime: 0.0s, RemoveRedundantFlowUnfoldingTime: 0.0s, BackfoldingTime: 0.0s, BackfoldingUnfoldingTime: 0.0s, FlowIncreaseByBackfolding: 0, BasicCegarLoop: OverallTime: 3.2s, OverallIterations: 6, TraceHistogramMax: 1, PathProgramHistogramMax: 2, EmptinessCheckTime: 0.0s, AutomataDifference: 0.5s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 55 SdHoareTripleChecker+Valid, 0.3s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 55 mSDsluCounter, 0 SdHoareTripleChecker+Invalid, 0.2s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 0 mSDsCounter, 1 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 252 IncrementalHoareTripleChecker+Invalid, 253 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 1 mSolverCounterUnsat, 0 mSDtfsCounter, 252 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 24 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=90occurred in iteration=5, InterpolantAutomatonStates: 23, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 2.1s InterpolantComputationTime, 104 NumberOfCodeBlocks, 104 NumberOfCodeBlocksAsserted, 6 NumberOfCheckSat, 98 ConstructedInterpolants, 0 QuantifiedInterpolants, 675 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 6 InterpolantComputations, 6 PerfectInterpolantSequences, 14/14 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2024-11-20 09:36:22,035 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Result: TRUE