./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-subst.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 4a390ef5 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-subst.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 3b43103ca9a91605874c4d895f03c4116805b9b245b91cffe9bd63255503e5a0 --- Real Ultimate output --- This is Ultimate 0.2.5-dev-4a390ef-m [2024-10-24 12:28:15,644 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-10-24 12:28:15,741 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-10-24 12:28:15,745 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-10-24 12:28:15,746 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-10-24 12:28:15,777 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-10-24 12:28:15,778 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-10-24 12:28:15,778 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-10-24 12:28:15,779 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-10-24 12:28:15,779 INFO L153 SettingsManager]: * Use memory slicer=true [2024-10-24 12:28:15,780 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-10-24 12:28:15,780 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-10-24 12:28:15,780 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-10-24 12:28:15,781 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-10-24 12:28:15,781 INFO L153 SettingsManager]: * Use SBE=true [2024-10-24 12:28:15,782 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-10-24 12:28:15,784 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-10-24 12:28:15,785 INFO L153 SettingsManager]: * sizeof long=4 [2024-10-24 12:28:15,785 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-10-24 12:28:15,786 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-10-24 12:28:15,786 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-10-24 12:28:15,787 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-10-24 12:28:15,787 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-10-24 12:28:15,787 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-10-24 12:28:15,790 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-10-24 12:28:15,791 INFO L153 SettingsManager]: * sizeof long double=12 [2024-10-24 12:28:15,791 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-10-24 12:28:15,791 INFO L153 SettingsManager]: * Use constant arrays=true [2024-10-24 12:28:15,792 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-10-24 12:28:15,792 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-10-24 12:28:15,793 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-10-24 12:28:15,793 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-10-24 12:28:15,793 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-24 12:28:15,794 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-10-24 12:28:15,794 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-10-24 12:28:15,795 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-10-24 12:28:15,795 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-10-24 12:28:15,795 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-10-24 12:28:15,795 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-10-24 12:28:15,796 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-10-24 12:28:15,796 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-10-24 12:28:15,796 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-10-24 12:28:15,797 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 3b43103ca9a91605874c4d895f03c4116805b9b245b91cffe9bd63255503e5a0 [2024-10-24 12:28:16,137 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-10-24 12:28:16,163 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-10-24 12:28:16,166 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-10-24 12:28:16,167 INFO L270 PluginConnector]: Initializing CDTParser... [2024-10-24 12:28:16,167 INFO L274 PluginConnector]: CDTParser initialized [2024-10-24 12:28:16,168 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/chl-node-subst.wvr.c [2024-10-24 12:28:17,614 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-10-24 12:28:17,881 INFO L384 CDTParser]: Found 1 translation units. [2024-10-24 12:28:17,882 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/chl-node-subst.wvr.c [2024-10-24 12:28:17,900 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/76baca69b/5013a43b8603418b8529752373cdfb4f/FLAGdfd62f74e [2024-10-24 12:28:18,192 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/76baca69b/5013a43b8603418b8529752373cdfb4f [2024-10-24 12:28:18,194 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-10-24 12:28:18,196 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-10-24 12:28:18,197 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-10-24 12:28:18,197 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-10-24 12:28:18,203 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-10-24 12:28:18,204 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.10 12:28:18" (1/1) ... [2024-10-24 12:28:18,205 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7baace64 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 12:28:18, skipping insertion in model container [2024-10-24 12:28:18,207 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.10 12:28:18" (1/1) ... [2024-10-24 12:28:18,241 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-10-24 12:28:18,465 WARN L248 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/chl-node-subst.wvr.c[4035,4048] [2024-10-24 12:28:18,482 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-24 12:28:18,492 INFO L200 MainTranslator]: Completed pre-run [2024-10-24 12:28:18,517 WARN L248 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/chl-node-subst.wvr.c[4035,4048] [2024-10-24 12:28:18,523 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-24 12:28:18,540 INFO L204 MainTranslator]: Completed translation [2024-10-24 12:28:18,541 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 12:28:18 WrapperNode [2024-10-24 12:28:18,541 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-10-24 12:28:18,542 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-10-24 12:28:18,542 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-10-24 12:28:18,542 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-10-24 12:28:18,549 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 12:28:18" (1/1) ... [2024-10-24 12:28:18,559 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 12:28:18" (1/1) ... [2024-10-24 12:28:18,596 INFO L138 Inliner]: procedures = 26, calls = 51, calls flagged for inlining = 22, calls inlined = 34, statements flattened = 424 [2024-10-24 12:28:18,597 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-10-24 12:28:18,598 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-10-24 12:28:18,598 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-10-24 12:28:18,598 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-10-24 12:28:18,620 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 12:28:18" (1/1) ... [2024-10-24 12:28:18,621 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 12:28:18" (1/1) ... [2024-10-24 12:28:18,628 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 12:28:18" (1/1) ... [2024-10-24 12:28:18,654 INFO L175 MemorySlicer]: Split 26 memory accesses to 3 slices as follows [2, 9, 15]. 58 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0, 0]. The 6 writes are split as follows [0, 3, 3]. [2024-10-24 12:28:18,654 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 12:28:18" (1/1) ... [2024-10-24 12:28:18,655 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 12:28:18" (1/1) ... [2024-10-24 12:28:18,668 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 12:28:18" (1/1) ... [2024-10-24 12:28:18,675 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 12:28:18" (1/1) ... [2024-10-24 12:28:18,678 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 12:28:18" (1/1) ... [2024-10-24 12:28:18,680 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 12:28:18" (1/1) ... [2024-10-24 12:28:18,692 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-10-24 12:28:18,693 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-10-24 12:28:18,693 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-10-24 12:28:18,693 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-10-24 12:28:18,696 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 12:28:18" (1/1) ... [2024-10-24 12:28:18,707 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-24 12:28:18,719 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-24 12:28:18,750 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) [2024-10-24 12:28:18,755 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 [2024-10-24 12:28:18,806 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-10-24 12:28:18,806 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-10-24 12:28:18,807 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-10-24 12:28:18,807 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2024-10-24 12:28:18,807 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-10-24 12:28:18,808 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-10-24 12:28:18,808 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2024-10-24 12:28:18,808 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2024-10-24 12:28:18,809 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2024-10-24 12:28:18,810 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2024-10-24 12:28:18,810 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2024-10-24 12:28:18,810 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2024-10-24 12:28:18,810 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2024-10-24 12:28:18,810 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-10-24 12:28:18,810 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-10-24 12:28:18,810 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2024-10-24 12:28:18,810 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-10-24 12:28:18,810 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-10-24 12:28:18,810 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-10-24 12:28:18,813 WARN L207 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2024-10-24 12:28:18,997 INFO L238 CfgBuilder]: Building ICFG [2024-10-24 12:28:18,999 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-10-24 12:28:19,740 INFO L283 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2024-10-24 12:28:19,741 INFO L287 CfgBuilder]: Performing block encoding [2024-10-24 12:28:20,349 INFO L309 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-10-24 12:28:20,349 INFO L314 CfgBuilder]: Removed 6 assume(true) statements. [2024-10-24 12:28:20,350 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.10 12:28:20 BoogieIcfgContainer [2024-10-24 12:28:20,351 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-10-24 12:28:20,352 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-10-24 12:28:20,353 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-10-24 12:28:20,357 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-10-24 12:28:20,357 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.10 12:28:18" (1/3) ... [2024-10-24 12:28:20,358 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@17aa1e65 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.10 12:28:20, skipping insertion in model container [2024-10-24 12:28:20,358 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 12:28:18" (2/3) ... [2024-10-24 12:28:20,359 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@17aa1e65 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.10 12:28:20, skipping insertion in model container [2024-10-24 12:28:20,360 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.10 12:28:20" (3/3) ... [2024-10-24 12:28:20,361 INFO L112 eAbstractionObserver]: Analyzing ICFG chl-node-subst.wvr.c [2024-10-24 12:28:20,381 INFO L209 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-10-24 12:28:20,381 INFO L149 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-10-24 12:28:20,381 INFO L484 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-10-24 12:28:20,537 INFO L143 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2024-10-24 12:28:20,587 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 35 places, 31 transitions, 83 flow [2024-10-24 12:28:20,620 INFO L124 PetriNetUnfolderBase]: 6/28 cut-off events. [2024-10-24 12:28:20,621 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2024-10-24 12:28:20,623 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41 conditions, 28 events. 6/28 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 2. Compared 13 event pairs, 0 based on Foata normal form. 0/21 useless extension candidates. Maximal degree in co-relation 23. Up to 2 conditions per place. [2024-10-24 12:28:20,623 INFO L82 GeneralOperation]: Start removeDead. Operand has 35 places, 31 transitions, 83 flow [2024-10-24 12:28:20,627 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 31 places, 27 transitions, 72 flow [2024-10-24 12:28:20,640 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-10-24 12:28:20,648 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;@58bc939e, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-10-24 12:28:20,648 INFO L334 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2024-10-24 12:28:20,668 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-10-24 12:28:20,668 INFO L124 PetriNetUnfolderBase]: 6/26 cut-off events. [2024-10-24 12:28:20,668 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2024-10-24 12:28:20,668 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-24 12:28:20,669 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] [2024-10-24 12:28:20,670 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-10-24 12:28:20,675 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 12:28:20,676 INFO L85 PathProgramCache]: Analyzing trace with hash 1832792802, now seen corresponding path program 1 times [2024-10-24 12:28:20,684 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 12:28:20,685 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1270381105] [2024-10-24 12:28:20,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 12:28:20,686 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 12:28:20,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 12:28:21,268 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 12:28:21,269 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 12:28:21,269 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1270381105] [2024-10-24 12:28:21,270 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1270381105] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-24 12:28:21,270 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-24 12:28:21,270 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-10-24 12:28:21,272 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [963694658] [2024-10-24 12:28:21,273 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-24 12:28:21,282 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-24 12:28:21,287 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-24 12:28:21,308 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-24 12:28:21,309 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-24 12:28:21,310 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 31 [2024-10-24 12:28:21,312 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 31 places, 27 transitions, 72 flow. Second operand has 3 states, 3 states have (on average 10.666666666666666) internal successors, (32), 3 states have internal predecessors, (32), 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) [2024-10-24 12:28:21,312 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-24 12:28:21,312 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 31 [2024-10-24 12:28:21,313 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-24 12:28:21,477 INFO L124 PetriNetUnfolderBase]: 38/83 cut-off events. [2024-10-24 12:28:21,478 INFO L125 PetriNetUnfolderBase]: For 13/13 co-relation queries the response was YES. [2024-10-24 12:28:21,480 INFO L83 FinitePrefix]: Finished finitePrefix Result has 191 conditions, 83 events. 38/83 cut-off events. For 13/13 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 139 event pairs, 32 based on Foata normal form. 0/77 useless extension candidates. Maximal degree in co-relation 120. Up to 82 conditions per place. [2024-10-24 12:28:21,482 INFO L140 encePairwiseOnDemand]: 28/31 looper letters, 25 selfloop transitions, 2 changer transitions 0/28 dead transitions. [2024-10-24 12:28:21,482 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 33 places, 28 transitions, 128 flow [2024-10-24 12:28:21,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-24 12:28:21,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-10-24 12:28:21,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 40 transitions. [2024-10-24 12:28:21,496 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.43010752688172044 [2024-10-24 12:28:21,498 INFO L175 Difference]: Start difference. First operand has 31 places, 27 transitions, 72 flow. Second operand 3 states and 40 transitions. [2024-10-24 12:28:21,499 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 33 places, 28 transitions, 128 flow [2024-10-24 12:28:21,502 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 27 places, 28 transitions, 116 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-10-24 12:28:21,505 INFO L231 Difference]: Finished difference. Result has 28 places, 28 transitions, 72 flow [2024-10-24 12:28:21,507 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=60, PETRI_DIFFERENCE_MINUEND_PLACES=25, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=27, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=72, PETRI_PLACES=28, PETRI_TRANSITIONS=28} [2024-10-24 12:28:21,513 INFO L277 CegarLoopForPetriNet]: 31 programPoint places, -3 predicate places. [2024-10-24 12:28:21,513 INFO L471 AbstractCegarLoop]: Abstraction has has 28 places, 28 transitions, 72 flow [2024-10-24 12:28:21,514 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 10.666666666666666) internal successors, (32), 3 states have internal predecessors, (32), 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) [2024-10-24 12:28:21,514 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-24 12:28:21,514 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-24 12:28:21,514 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-10-24 12:28:21,514 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-10-24 12:28:21,515 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 12:28:21,515 INFO L85 PathProgramCache]: Analyzing trace with hash -1211915053, now seen corresponding path program 1 times [2024-10-24 12:28:21,515 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 12:28:21,516 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2106073173] [2024-10-24 12:28:21,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 12:28:21,516 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 12:28:21,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 12:28:21,812 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-24 12:28:21,813 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 12:28:21,813 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2106073173] [2024-10-24 12:28:21,814 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2106073173] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-24 12:28:21,814 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-24 12:28:21,814 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-10-24 12:28:21,814 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [454057648] [2024-10-24 12:28:21,815 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-24 12:28:21,816 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-10-24 12:28:21,817 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-24 12:28:21,817 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-10-24 12:28:21,818 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-10-24 12:28:21,818 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 31 [2024-10-24 12:28:21,819 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 28 places, 28 transitions, 72 flow. Second operand has 4 states, 4 states have (on average 9.25) internal successors, (37), 4 states have internal predecessors, (37), 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) [2024-10-24 12:28:21,819 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-24 12:28:21,819 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 31 [2024-10-24 12:28:21,819 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-24 12:28:21,971 INFO L124 PetriNetUnfolderBase]: 38/84 cut-off events. [2024-10-24 12:28:21,971 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-10-24 12:28:21,972 INFO L83 FinitePrefix]: Finished finitePrefix Result has 183 conditions, 84 events. 38/84 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 138 event pairs, 32 based on Foata normal form. 0/78 useless extension candidates. Maximal degree in co-relation 172. Up to 81 conditions per place. [2024-10-24 12:28:21,973 INFO L140 encePairwiseOnDemand]: 26/31 looper letters, 24 selfloop transitions, 4 changer transitions 0/29 dead transitions. [2024-10-24 12:28:21,973 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 31 places, 29 transitions, 130 flow [2024-10-24 12:28:21,975 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-10-24 12:28:21,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-10-24 12:28:21,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 45 transitions. [2024-10-24 12:28:21,978 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.3629032258064516 [2024-10-24 12:28:21,978 INFO L175 Difference]: Start difference. First operand has 28 places, 28 transitions, 72 flow. Second operand 4 states and 45 transitions. [2024-10-24 12:28:21,978 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 31 places, 29 transitions, 130 flow [2024-10-24 12:28:21,979 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 30 places, 29 transitions, 126 flow, removed 1 selfloop flow, removed 1 redundant places. [2024-10-24 12:28:21,980 INFO L231 Difference]: Finished difference. Result has 31 places, 29 transitions, 86 flow [2024-10-24 12:28:21,983 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=68, PETRI_DIFFERENCE_MINUEND_PLACES=27, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=28, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=86, PETRI_PLACES=31, PETRI_TRANSITIONS=29} [2024-10-24 12:28:21,984 INFO L277 CegarLoopForPetriNet]: 31 programPoint places, 0 predicate places. [2024-10-24 12:28:21,984 INFO L471 AbstractCegarLoop]: Abstraction has has 31 places, 29 transitions, 86 flow [2024-10-24 12:28:21,984 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 9.25) internal successors, (37), 4 states have internal predecessors, (37), 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) [2024-10-24 12:28:21,984 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-24 12:28:21,985 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] [2024-10-24 12:28:21,985 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-10-24 12:28:21,985 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-10-24 12:28:21,986 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 12:28:21,986 INFO L85 PathProgramCache]: Analyzing trace with hash -1038909340, now seen corresponding path program 1 times [2024-10-24 12:28:21,986 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 12:28:21,986 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2109492732] [2024-10-24 12:28:21,986 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 12:28:21,986 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 12:28:22,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 12:28:22,216 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-10-24 12:28:22,216 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 12:28:22,216 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2109492732] [2024-10-24 12:28:22,217 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2109492732] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-24 12:28:22,217 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-24 12:28:22,217 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-10-24 12:28:22,217 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2109504531] [2024-10-24 12:28:22,217 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-24 12:28:22,218 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-10-24 12:28:22,218 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-24 12:28:22,218 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-10-24 12:28:22,218 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-10-24 12:28:22,219 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 31 [2024-10-24 12:28:22,219 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 31 places, 29 transitions, 86 flow. Second operand has 4 states, 4 states have (on average 9.5) internal successors, (38), 4 states have internal predecessors, (38), 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) [2024-10-24 12:28:22,220 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-24 12:28:22,220 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 31 [2024-10-24 12:28:22,220 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-24 12:28:22,351 INFO L124 PetriNetUnfolderBase]: 38/85 cut-off events. [2024-10-24 12:28:22,352 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-10-24 12:28:22,352 INFO L83 FinitePrefix]: Finished finitePrefix Result has 192 conditions, 85 events. 38/85 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 138 event pairs, 32 based on Foata normal form. 0/80 useless extension candidates. Maximal degree in co-relation 172. Up to 82 conditions per place. [2024-10-24 12:28:22,357 INFO L140 encePairwiseOnDemand]: 26/31 looper letters, 25 selfloop transitions, 4 changer transitions 0/30 dead transitions. [2024-10-24 12:28:22,357 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 34 places, 30 transitions, 146 flow [2024-10-24 12:28:22,358 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-10-24 12:28:22,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-10-24 12:28:22,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 45 transitions. [2024-10-24 12:28:22,359 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.3629032258064516 [2024-10-24 12:28:22,359 INFO L175 Difference]: Start difference. First operand has 31 places, 29 transitions, 86 flow. Second operand 4 states and 45 transitions. [2024-10-24 12:28:22,359 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 34 places, 30 transitions, 146 flow [2024-10-24 12:28:22,359 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 33 places, 30 transitions, 145 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-10-24 12:28:22,360 INFO L231 Difference]: Finished difference. Result has 34 places, 30 transitions, 103 flow [2024-10-24 12:28:22,360 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=85, PETRI_DIFFERENCE_MINUEND_PLACES=30, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=29, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=103, PETRI_PLACES=34, PETRI_TRANSITIONS=30} [2024-10-24 12:28:22,365 INFO L277 CegarLoopForPetriNet]: 31 programPoint places, 3 predicate places. [2024-10-24 12:28:22,366 INFO L471 AbstractCegarLoop]: Abstraction has has 34 places, 30 transitions, 103 flow [2024-10-24 12:28:22,366 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 9.5) internal successors, (38), 4 states have internal predecessors, (38), 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) [2024-10-24 12:28:22,366 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-24 12:28:22,366 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] [2024-10-24 12:28:22,366 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-10-24 12:28:22,367 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-10-24 12:28:22,367 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 12:28:22,367 INFO L85 PathProgramCache]: Analyzing trace with hash 1091596161, now seen corresponding path program 1 times [2024-10-24 12:28:22,368 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 12:28:22,371 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [869526021] [2024-10-24 12:28:22,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 12:28:22,372 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 12:28:22,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 12:28:22,586 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-10-24 12:28:22,587 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 12:28:22,587 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [869526021] [2024-10-24 12:28:22,587 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [869526021] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-24 12:28:22,588 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-24 12:28:22,588 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-10-24 12:28:22,588 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [670418493] [2024-10-24 12:28:22,589 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-24 12:28:22,589 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-10-24 12:28:22,590 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-24 12:28:22,591 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-10-24 12:28:22,592 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-10-24 12:28:22,592 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 31 [2024-10-24 12:28:22,593 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 34 places, 30 transitions, 103 flow. Second operand has 4 states, 4 states have (on average 9.75) internal successors, (39), 4 states have internal predecessors, (39), 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) [2024-10-24 12:28:22,593 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-24 12:28:22,593 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 31 [2024-10-24 12:28:22,593 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-24 12:28:22,760 INFO L124 PetriNetUnfolderBase]: 38/86 cut-off events. [2024-10-24 12:28:22,760 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2024-10-24 12:28:22,761 INFO L83 FinitePrefix]: Finished finitePrefix Result has 203 conditions, 86 events. 38/86 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 138 event pairs, 32 based on Foata normal form. 0/82 useless extension candidates. Maximal degree in co-relation 179. Up to 84 conditions per place. [2024-10-24 12:28:22,761 INFO L140 encePairwiseOnDemand]: 27/31 looper letters, 27 selfloop transitions, 3 changer transitions 0/31 dead transitions. [2024-10-24 12:28:22,762 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 37 places, 31 transitions, 165 flow [2024-10-24 12:28:22,762 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-10-24 12:28:22,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-10-24 12:28:22,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 44 transitions. [2024-10-24 12:28:22,763 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.3548387096774194 [2024-10-24 12:28:22,764 INFO L175 Difference]: Start difference. First operand has 34 places, 30 transitions, 103 flow. Second operand 4 states and 44 transitions. [2024-10-24 12:28:22,764 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 37 places, 31 transitions, 165 flow [2024-10-24 12:28:22,765 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 35 places, 31 transitions, 161 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-10-24 12:28:22,766 INFO L231 Difference]: Finished difference. Result has 36 places, 31 transitions, 113 flow [2024-10-24 12:28:22,767 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=99, PETRI_DIFFERENCE_MINUEND_PLACES=32, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=30, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=113, PETRI_PLACES=36, PETRI_TRANSITIONS=31} [2024-10-24 12:28:22,768 INFO L277 CegarLoopForPetriNet]: 31 programPoint places, 5 predicate places. [2024-10-24 12:28:22,768 INFO L471 AbstractCegarLoop]: Abstraction has has 36 places, 31 transitions, 113 flow [2024-10-24 12:28:22,769 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 9.75) internal successors, (39), 4 states have internal predecessors, (39), 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) [2024-10-24 12:28:22,769 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-24 12:28:22,769 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-24 12:28:22,769 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-10-24 12:28:22,770 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-10-24 12:28:22,771 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 12:28:22,771 INFO L85 PathProgramCache]: Analyzing trace with hash 1484568796, now seen corresponding path program 1 times [2024-10-24 12:28:22,771 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 12:28:22,771 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [44280249] [2024-10-24 12:28:22,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 12:28:22,772 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 12:28:22,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 12:28:22,954 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-10-24 12:28:22,955 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 12:28:22,955 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [44280249] [2024-10-24 12:28:22,955 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [44280249] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-24 12:28:22,955 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-24 12:28:22,955 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-10-24 12:28:22,956 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1154818766] [2024-10-24 12:28:22,956 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-24 12:28:22,956 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-10-24 12:28:22,957 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-24 12:28:22,957 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-10-24 12:28:22,957 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-10-24 12:28:22,957 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 31 [2024-10-24 12:28:22,958 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 36 places, 31 transitions, 113 flow. Second operand has 4 states, 4 states have (on average 10.0) internal successors, (40), 4 states have internal predecessors, (40), 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) [2024-10-24 12:28:22,958 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-24 12:28:22,958 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 31 [2024-10-24 12:28:22,958 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-24 12:28:23,049 INFO L124 PetriNetUnfolderBase]: 38/87 cut-off events. [2024-10-24 12:28:23,049 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2024-10-24 12:28:23,050 INFO L83 FinitePrefix]: Finished finitePrefix Result has 210 conditions, 87 events. 38/87 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 138 event pairs, 32 based on Foata normal form. 0/84 useless extension candidates. Maximal degree in co-relation 185. Up to 85 conditions per place. [2024-10-24 12:28:23,051 INFO L140 encePairwiseOnDemand]: 27/31 looper letters, 28 selfloop transitions, 3 changer transitions 0/32 dead transitions. [2024-10-24 12:28:23,051 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 39 places, 32 transitions, 177 flow [2024-10-24 12:28:23,051 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-10-24 12:28:23,052 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-10-24 12:28:23,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 44 transitions. [2024-10-24 12:28:23,052 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.3548387096774194 [2024-10-24 12:28:23,053 INFO L175 Difference]: Start difference. First operand has 36 places, 31 transitions, 113 flow. Second operand 4 states and 44 transitions. [2024-10-24 12:28:23,053 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 39 places, 32 transitions, 177 flow [2024-10-24 12:28:23,054 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 37 places, 32 transitions, 171 flow, removed 1 selfloop flow, removed 2 redundant places. [2024-10-24 12:28:23,055 INFO L231 Difference]: Finished difference. Result has 38 places, 32 transitions, 121 flow [2024-10-24 12:28:23,055 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=107, PETRI_DIFFERENCE_MINUEND_PLACES=34, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=31, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=121, PETRI_PLACES=38, PETRI_TRANSITIONS=32} [2024-10-24 12:28:23,055 INFO L277 CegarLoopForPetriNet]: 31 programPoint places, 7 predicate places. [2024-10-24 12:28:23,056 INFO L471 AbstractCegarLoop]: Abstraction has has 38 places, 32 transitions, 121 flow [2024-10-24 12:28:23,056 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 10.0) internal successors, (40), 4 states have internal predecessors, (40), 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) [2024-10-24 12:28:23,056 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-24 12:28:23,056 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-24 12:28:23,057 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-10-24 12:28:23,057 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-10-24 12:28:23,057 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 12:28:23,058 INFO L85 PathProgramCache]: Analyzing trace with hash 667979527, now seen corresponding path program 1 times [2024-10-24 12:28:23,058 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 12:28:23,058 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [212842200] [2024-10-24 12:28:23,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 12:28:23,058 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 12:28:23,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 12:28:23,259 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-10-24 12:28:23,260 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 12:28:23,260 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [212842200] [2024-10-24 12:28:23,260 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [212842200] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-24 12:28:23,260 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-24 12:28:23,261 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-10-24 12:28:23,261 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1776439078] [2024-10-24 12:28:23,261 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-24 12:28:23,261 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-10-24 12:28:23,262 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-24 12:28:23,262 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-10-24 12:28:23,262 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-10-24 12:28:23,263 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 31 [2024-10-24 12:28:23,263 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 38 places, 32 transitions, 121 flow. Second operand has 4 states, 4 states have (on average 10.25) internal successors, (41), 4 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 12:28:23,263 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-24 12:28:23,263 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 31 [2024-10-24 12:28:23,263 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-24 12:28:23,364 INFO L124 PetriNetUnfolderBase]: 38/88 cut-off events. [2024-10-24 12:28:23,364 INFO L125 PetriNetUnfolderBase]: For 5/5 co-relation queries the response was YES. [2024-10-24 12:28:23,365 INFO L83 FinitePrefix]: Finished finitePrefix Result has 216 conditions, 88 events. 38/88 cut-off events. For 5/5 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 138 event pairs, 32 based on Foata normal form. 0/86 useless extension candidates. Maximal degree in co-relation 190. Up to 86 conditions per place. [2024-10-24 12:28:23,366 INFO L140 encePairwiseOnDemand]: 27/31 looper letters, 29 selfloop transitions, 3 changer transitions 0/33 dead transitions. [2024-10-24 12:28:23,366 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 41 places, 33 transitions, 187 flow [2024-10-24 12:28:23,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-10-24 12:28:23,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-10-24 12:28:23,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 44 transitions. [2024-10-24 12:28:23,367 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.3548387096774194 [2024-10-24 12:28:23,368 INFO L175 Difference]: Start difference. First operand has 38 places, 32 transitions, 121 flow. Second operand 4 states and 44 transitions. [2024-10-24 12:28:23,368 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 41 places, 33 transitions, 187 flow [2024-10-24 12:28:23,369 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 39 places, 33 transitions, 181 flow, removed 1 selfloop flow, removed 2 redundant places. [2024-10-24 12:28:23,369 INFO L231 Difference]: Finished difference. Result has 40 places, 33 transitions, 129 flow [2024-10-24 12:28:23,370 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=115, PETRI_DIFFERENCE_MINUEND_PLACES=36, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=32, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=129, PETRI_PLACES=40, PETRI_TRANSITIONS=33} [2024-10-24 12:28:23,371 INFO L277 CegarLoopForPetriNet]: 31 programPoint places, 9 predicate places. [2024-10-24 12:28:23,372 INFO L471 AbstractCegarLoop]: Abstraction has has 40 places, 33 transitions, 129 flow [2024-10-24 12:28:23,372 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 10.25) internal successors, (41), 4 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 12:28:23,372 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-24 12:28:23,372 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] [2024-10-24 12:28:23,373 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-10-24 12:28:23,373 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-10-24 12:28:23,374 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 12:28:23,374 INFO L85 PathProgramCache]: Analyzing trace with hash 1966291484, now seen corresponding path program 1 times [2024-10-24 12:28:23,374 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 12:28:23,374 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1081285935] [2024-10-24 12:28:23,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 12:28:23,375 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 12:28:23,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 12:28:28,929 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-10-24 12:28:28,930 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 12:28:28,931 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1081285935] [2024-10-24 12:28:28,931 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1081285935] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-24 12:28:28,934 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2012219657] [2024-10-24 12:28:28,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 12:28:28,934 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-24 12:28:28,934 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-24 12:28:28,937 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) [2024-10-24 12:28:28,938 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-10-24 12:28:29,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 12:28:29,141 INFO L255 TraceCheckSpWp]: Trace formula consists of 389 conjuncts, 22 conjuncts are in the unsatisfiable core [2024-10-24 12:28:29,154 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-24 12:28:40,344 WARN L286 SmtUtils]: Spent 6.50s on a formula simplification that was a NOOP. DAG size: 1142 (called from [L 346] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.arrays.Elim1Store.elim1) [2024-10-24 12:28:40,346 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-24 12:28:40,348 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 19 select indices, 19 select index equivalence classes, 0 disjoint index pairs (out of 171 index pairs), introduced 19 new quantified variables, introduced 171 case distinctions, treesize of input 1352 treesize of output 4148 [2024-10-24 12:28:48,922 WARN L286 SmtUtils]: Spent 8.35s on a formula simplification that was a NOOP. DAG size: 1122 (called from [L 346] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.arrays.Elim1Store.elim1) [2024-10-24 12:28:48,924 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-24 12:28:48,925 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 19 select indices, 19 select index equivalence classes, 0 disjoint index pairs (out of 171 index pairs), introduced 19 new quantified variables, introduced 171 case distinctions, treesize of input 680 treesize of output 3236