./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/weaver/chl-chromosome-trans.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 8be7027f Calling Ultimate with: /root/.sdkman/candidates/java/11.0.12-open/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/weaver/chl-chromosome-trans.wvr.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash f36f5593156fc25b34b4c706b0d898a2d66ee8bab5f6d91cd69ff9cf3c129193 --- Real Ultimate output --- This is Ultimate 0.2.5-wip.dk.perfect-tracechecks-8be7027-m [2024-11-12 08:19:21,717 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-12 08:19:21,805 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-11-12 08:19:21,810 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-12 08:19:21,812 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-12 08:19:21,848 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-12 08:19:21,849 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-12 08:19:21,850 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-12 08:19:21,850 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-12 08:19:21,851 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-12 08:19:21,853 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-12 08:19:21,853 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-12 08:19:21,853 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-12 08:19:21,854 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-12 08:19:21,856 INFO L153 SettingsManager]: * Use SBE=true [2024-11-12 08:19:21,856 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-12 08:19:21,856 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-11-12 08:19:21,857 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-12 08:19:21,857 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-12 08:19:21,857 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-12 08:19:21,857 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-12 08:19:21,861 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-11-12 08:19:21,861 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-12 08:19:21,862 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-11-12 08:19:21,862 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-12 08:19:21,862 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-12 08:19:21,862 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-11-12 08:19:21,863 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-12 08:19:21,863 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-12 08:19:21,863 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-12 08:19:21,863 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-12 08:19:21,864 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-12 08:19:21,864 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-12 08:19:21,864 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-12 08:19:21,864 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-12 08:19:21,865 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-11-12 08:19:21,865 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-12 08:19:21,865 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-12 08:19:21,865 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-12 08:19:21,866 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-12 08:19:21,866 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-12 08:19:21,867 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-12 08:19:21,867 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> f36f5593156fc25b34b4c706b0d898a2d66ee8bab5f6d91cd69ff9cf3c129193 [2024-11-12 08:19:22,144 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-12 08:19:22,171 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-12 08:19:22,174 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-12 08:19:22,175 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-12 08:19:22,176 INFO L274 PluginConnector]: CDTParser initialized [2024-11-12 08:19:22,177 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/weaver/chl-chromosome-trans.wvr.c [2024-11-12 08:19:23,708 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-12 08:19:23,893 INFO L384 CDTParser]: Found 1 translation units. [2024-11-12 08:19:23,893 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/chl-chromosome-trans.wvr.c [2024-11-12 08:19:23,906 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d373296c7/17275d7656e345baa532a8ceaea17ca2/FLAG468af0eb0 [2024-11-12 08:19:23,922 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d373296c7/17275d7656e345baa532a8ceaea17ca2 [2024-11-12 08:19:23,925 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-12 08:19:23,927 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-12 08:19:23,930 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-12 08:19:23,931 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-12 08:19:23,936 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-12 08:19:23,937 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 08:19:23" (1/1) ... [2024-11-12 08:19:23,938 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@fb2cf1f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 08:19:23, skipping insertion in model container [2024-11-12 08:19:23,938 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 08:19:23" (1/1) ... [2024-11-12 08:19:23,969 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-12 08:19:24,196 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-chromosome-trans.wvr.c[3073,3086] [2024-11-12 08:19:24,207 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-12 08:19:24,216 INFO L200 MainTranslator]: Completed pre-run [2024-11-12 08:19:24,259 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-chromosome-trans.wvr.c[3073,3086] [2024-11-12 08:19:24,268 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-12 08:19:24,312 INFO L204 MainTranslator]: Completed translation [2024-11-12 08:19:24,312 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 08:19:24 WrapperNode [2024-11-12 08:19:24,316 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-12 08:19:24,319 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-12 08:19:24,319 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-12 08:19:24,319 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-12 08:19:24,325 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 08:19:24" (1/1) ... [2024-11-12 08:19:24,333 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 08:19:24" (1/1) ... [2024-11-12 08:19:24,366 INFO L138 Inliner]: procedures = 25, calls = 31, calls flagged for inlining = 16, calls inlined = 24, statements flattened = 267 [2024-11-12 08:19:24,366 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-12 08:19:24,367 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-12 08:19:24,367 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-12 08:19:24,367 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-12 08:19:24,378 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 08:19:24" (1/1) ... [2024-11-12 08:19:24,379 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 08:19:24" (1/1) ... [2024-11-12 08:19:24,383 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 08:19:24" (1/1) ... [2024-11-12 08:19:24,405 INFO L175 MemorySlicer]: Split 11 memory accesses to 2 slices as follows [2, 9]. 82 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0]. The 3 writes are split as follows [0, 3]. [2024-11-12 08:19:24,406 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 08:19:24" (1/1) ... [2024-11-12 08:19:24,406 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 08:19:24" (1/1) ... [2024-11-12 08:19:24,415 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 08:19:24" (1/1) ... [2024-11-12 08:19:24,422 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 08:19:24" (1/1) ... [2024-11-12 08:19:24,424 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 08:19:24" (1/1) ... [2024-11-12 08:19:24,426 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 08:19:24" (1/1) ... [2024-11-12 08:19:24,430 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-12 08:19:24,431 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-12 08:19:24,431 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-12 08:19:24,431 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-12 08:19:24,432 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 08:19:24" (1/1) ... [2024-11-12 08:19:24,437 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-12 08:19:24,450 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-12 08:19:24,471 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) [2024-11-12 08:19:24,476 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 [2024-11-12 08:19:24,527 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-12 08:19:24,527 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2024-11-12 08:19:24,529 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2024-11-12 08:19:24,529 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2024-11-12 08:19:24,529 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2024-11-12 08:19:24,529 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2024-11-12 08:19:24,530 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2024-11-12 08:19:24,530 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-11-12 08:19:24,530 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-11-12 08:19:24,530 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-11-12 08:19:24,530 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-11-12 08:19:24,532 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-11-12 08:19:24,533 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-12 08:19:24,533 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-12 08:19:24,533 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-11-12 08:19:24,533 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-11-12 08:19:24,535 WARN L207 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2024-11-12 08:19:24,683 INFO L238 CfgBuilder]: Building ICFG [2024-11-12 08:19:24,686 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-12 08:19:25,176 INFO L283 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2024-11-12 08:19:25,176 INFO L287 CfgBuilder]: Performing block encoding [2024-11-12 08:19:25,620 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-12 08:19:25,620 INFO L316 CfgBuilder]: Removed 6 assume(true) statements. [2024-11-12 08:19:25,621 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 08:19:25 BoogieIcfgContainer [2024-11-12 08:19:25,621 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-12 08:19:25,625 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-12 08:19:25,625 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-12 08:19:25,630 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-12 08:19:25,630 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.11 08:19:23" (1/3) ... [2024-11-12 08:19:25,631 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@30a5eee5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 08:19:25, skipping insertion in model container [2024-11-12 08:19:25,632 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 08:19:24" (2/3) ... [2024-11-12 08:19:25,632 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@30a5eee5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 08:19:25, skipping insertion in model container [2024-11-12 08:19:25,632 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 08:19:25" (3/3) ... [2024-11-12 08:19:25,633 INFO L112 eAbstractionObserver]: Analyzing ICFG chl-chromosome-trans.wvr.c [2024-11-12 08:19:25,651 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-12 08:19:25,651 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-11-12 08:19:25,651 INFO L489 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-11-12 08:19:25,726 INFO L143 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2024-11-12 08:19:25,769 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 35 places, 31 transitions, 83 flow [2024-11-12 08:19:25,797 INFO L124 PetriNetUnfolderBase]: 6/28 cut-off events. [2024-11-12 08:19:25,797 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2024-11-12 08:19:25,802 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 3. Compared 20 event pairs, 0 based on Foata normal form. 0/21 useless extension candidates. Maximal degree in co-relation 21. Up to 2 conditions per place. [2024-11-12 08:19:25,803 INFO L82 GeneralOperation]: Start removeDead. Operand has 35 places, 31 transitions, 83 flow [2024-11-12 08:19:25,807 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 31 places, 27 transitions, 72 flow [2024-11-12 08:19:25,817 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-12 08:19:25,824 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;@7658ea, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-12 08:19:25,824 INFO L334 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2024-11-12 08:19:25,835 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-11-12 08:19:25,835 INFO L124 PetriNetUnfolderBase]: 6/26 cut-off events. [2024-11-12 08:19:25,835 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2024-11-12 08:19:25,835 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-12 08:19:25,836 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-12 08:19:25,837 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-11-12 08:19:25,847 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 08:19:25,847 INFO L85 PathProgramCache]: Analyzing trace with hash 1325247194, now seen corresponding path program 1 times [2024-11-12 08:19:25,854 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 08:19:25,855 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [854605704] [2024-11-12 08:19:25,855 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 08:19:25,855 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 08:19:26,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 08:19:26,299 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-12 08:19:26,300 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-12 08:19:26,300 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [854605704] [2024-11-12 08:19:26,301 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [854605704] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-12 08:19:26,301 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-12 08:19:26,301 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-12 08:19:26,303 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [28645279] [2024-11-12 08:19:26,304 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-12 08:19:26,312 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-12 08:19:26,317 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-12 08:19:26,340 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-12 08:19:26,341 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-12 08:19:26,341 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 31 [2024-11-12 08:19:26,344 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) [2024-11-12 08:19:26,344 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-12 08:19:26,344 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 31 [2024-11-12 08:19:26,345 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-12 08:19:26,513 INFO L124 PetriNetUnfolderBase]: 202/302 cut-off events. [2024-11-12 08:19:26,513 INFO L125 PetriNetUnfolderBase]: For 32/32 co-relation queries the response was YES. [2024-11-12 08:19:26,516 INFO L83 FinitePrefix]: Finished finitePrefix Result has 647 conditions, 302 events. 202/302 cut-off events. For 32/32 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 694 event pairs, 124 based on Foata normal form. 0/224 useless extension candidates. Maximal degree in co-relation 534. Up to 299 conditions per place. [2024-11-12 08:19:26,521 INFO L140 encePairwiseOnDemand]: 24/31 looper letters, 23 selfloop transitions, 6 changer transitions 0/30 dead transitions. [2024-11-12 08:19:26,521 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 33 places, 30 transitions, 136 flow [2024-11-12 08:19:26,522 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-12 08:19:26,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-12 08:19:26,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 44 transitions. [2024-11-12 08:19:26,534 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4731182795698925 [2024-11-12 08:19:26,536 INFO L175 Difference]: Start difference. First operand has 31 places, 27 transitions, 72 flow. Second operand 3 states and 44 transitions. [2024-11-12 08:19:26,537 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 33 places, 30 transitions, 136 flow [2024-11-12 08:19:26,540 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 27 places, 30 transitions, 124 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-11-12 08:19:26,542 INFO L231 Difference]: Finished difference. Result has 28 places, 30 transitions, 92 flow [2024-11-12 08:19:26,545 INFO L262 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=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=92, PETRI_PLACES=28, PETRI_TRANSITIONS=30} [2024-11-12 08:19:26,552 INFO L279 CegarLoopForPetriNet]: 31 programPoint places, -3 predicate places. [2024-11-12 08:19:26,552 INFO L471 AbstractCegarLoop]: Abstraction has has 28 places, 30 transitions, 92 flow [2024-11-12 08:19:26,552 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) [2024-11-12 08:19:26,552 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-12 08:19:26,552 INFO L206 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] [2024-11-12 08:19:26,553 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-12 08:19:26,553 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-11-12 08:19:26,554 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 08:19:26,554 INFO L85 PathProgramCache]: Analyzing trace with hash -1674808808, now seen corresponding path program 1 times [2024-11-12 08:19:26,555 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 08:19:26,555 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [496225977] [2024-11-12 08:19:26,555 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 08:19:26,555 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 08:19:26,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 08:19:26,833 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-12 08:19:26,834 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-12 08:19:26,834 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [496225977] [2024-11-12 08:19:26,834 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [496225977] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-12 08:19:26,834 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-12 08:19:26,834 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-12 08:19:26,835 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [122594853] [2024-11-12 08:19:26,835 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-12 08:19:26,836 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-12 08:19:26,837 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-12 08:19:26,837 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-12 08:19:26,838 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-11-12 08:19:26,838 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 31 [2024-11-12 08:19:26,839 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 28 places, 30 transitions, 92 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) [2024-11-12 08:19:26,839 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-12 08:19:26,839 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 31 [2024-11-12 08:19:26,839 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-12 08:19:27,029 INFO L124 PetriNetUnfolderBase]: 306/451 cut-off events. [2024-11-12 08:19:27,031 INFO L125 PetriNetUnfolderBase]: For 14/14 co-relation queries the response was YES. [2024-11-12 08:19:27,034 INFO L83 FinitePrefix]: Finished finitePrefix Result has 931 conditions, 451 events. 306/451 cut-off events. For 14/14 co-relation queries the response was YES. Maximal size of possible extension queue 27. Compared 1207 event pairs, 124 based on Foata normal form. 1/328 useless extension candidates. Maximal degree in co-relation 900. Up to 302 conditions per place. [2024-11-12 08:19:27,037 INFO L140 encePairwiseOnDemand]: 28/31 looper letters, 37 selfloop transitions, 2 changer transitions 2/42 dead transitions. [2024-11-12 08:19:27,038 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 30 places, 42 transitions, 201 flow [2024-11-12 08:19:27,038 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-12 08:19:27,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-12 08:19:27,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 51 transitions. [2024-11-12 08:19:27,039 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5483870967741935 [2024-11-12 08:19:27,040 INFO L175 Difference]: Start difference. First operand has 28 places, 30 transitions, 92 flow. Second operand 3 states and 51 transitions. [2024-11-12 08:19:27,040 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 30 places, 42 transitions, 201 flow [2024-11-12 08:19:27,041 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 29 places, 42 transitions, 195 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-12 08:19:27,042 INFO L231 Difference]: Finished difference. Result has 30 places, 31 transitions, 98 flow [2024-11-12 08:19:27,042 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=86, PETRI_DIFFERENCE_MINUEND_PLACES=27, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=30, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=98, PETRI_PLACES=30, PETRI_TRANSITIONS=31} [2024-11-12 08:19:27,043 INFO L279 CegarLoopForPetriNet]: 31 programPoint places, -1 predicate places. [2024-11-12 08:19:27,044 INFO L471 AbstractCegarLoop]: Abstraction has has 30 places, 31 transitions, 98 flow [2024-11-12 08:19:27,044 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) [2024-11-12 08:19:27,045 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-12 08:19:27,046 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-12 08:19:27,046 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-12 08:19:27,046 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-11-12 08:19:27,048 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 08:19:27,048 INFO L85 PathProgramCache]: Analyzing trace with hash 278082362, now seen corresponding path program 1 times [2024-11-12 08:19:27,048 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 08:19:27,049 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [185991489] [2024-11-12 08:19:27,049 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 08:19:27,050 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 08:19:27,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 08:19:27,261 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-12 08:19:27,263 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-12 08:19:27,263 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [185991489] [2024-11-12 08:19:27,263 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [185991489] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-12 08:19:27,264 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [28231064] [2024-11-12 08:19:27,264 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 08:19:27,264 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-12 08:19:27,264 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-12 08:19:27,266 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-12 08:19:27,267 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-12 08:19:27,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 08:19:27,402 INFO L256 TraceCheckSpWp]: Trace formula consists of 294 conjuncts, 5 conjuncts are in the unsatisfiable core [2024-11-12 08:19:27,407 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-12 08:19:27,473 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-12 08:19:27,474 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-12 08:19:27,500 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-12 08:19:27,501 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [28231064] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-12 08:19:27,501 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-12 08:19:27,501 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 3, 3] total 8 [2024-11-12 08:19:27,501 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1660831285] [2024-11-12 08:19:27,501 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-12 08:19:27,502 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-11-12 08:19:27,502 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-12 08:19:27,503 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-11-12 08:19:27,503 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=29, Unknown=0, NotChecked=0, Total=56 [2024-11-12 08:19:27,504 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 31 [2024-11-12 08:19:27,504 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 30 places, 31 transitions, 98 flow. Second operand has 8 states, 8 states have (on average 8.0) internal successors, (64), 8 states have internal predecessors, (64), 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) [2024-11-12 08:19:27,504 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-12 08:19:27,504 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 31 [2024-11-12 08:19:27,504 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-12 08:19:27,645 INFO L124 PetriNetUnfolderBase]: 306/460 cut-off events. [2024-11-12 08:19:27,645 INFO L125 PetriNetUnfolderBase]: For 74/74 co-relation queries the response was YES. [2024-11-12 08:19:27,646 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1045 conditions, 460 events. 306/460 cut-off events. For 74/74 co-relation queries the response was YES. Maximal size of possible extension queue 27. Compared 1191 event pairs, 202 based on Foata normal form. 0/378 useless extension candidates. Maximal degree in co-relation 983. Up to 448 conditions per place. [2024-11-12 08:19:27,648 INFO L140 encePairwiseOnDemand]: 24/31 looper letters, 24 selfloop transitions, 15 changer transitions 0/40 dead transitions. [2024-11-12 08:19:27,648 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 35 places, 40 transitions, 212 flow [2024-11-12 08:19:27,649 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-12 08:19:27,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-12 08:19:27,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 71 transitions. [2024-11-12 08:19:27,650 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.3817204301075269 [2024-11-12 08:19:27,650 INFO L175 Difference]: Start difference. First operand has 30 places, 31 transitions, 98 flow. Second operand 6 states and 71 transitions. [2024-11-12 08:19:27,650 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 35 places, 40 transitions, 212 flow [2024-11-12 08:19:27,652 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 34 places, 40 transitions, 210 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-12 08:19:27,653 INFO L231 Difference]: Finished difference. Result has 37 places, 40 transitions, 192 flow [2024-11-12 08:19:27,653 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=96, PETRI_DIFFERENCE_MINUEND_PLACES=29, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=31, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=192, PETRI_PLACES=37, PETRI_TRANSITIONS=40} [2024-11-12 08:19:27,654 INFO L279 CegarLoopForPetriNet]: 31 programPoint places, 6 predicate places. [2024-11-12 08:19:27,654 INFO L471 AbstractCegarLoop]: Abstraction has has 37 places, 40 transitions, 192 flow [2024-11-12 08:19:27,654 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.0) internal successors, (64), 8 states have internal predecessors, (64), 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) [2024-11-12 08:19:27,654 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-12 08:19:27,654 INFO L206 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-12 08:19:27,673 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-11-12 08:19:27,855 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-12 08:19:27,856 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-11-12 08:19:27,856 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 08:19:27,856 INFO L85 PathProgramCache]: Analyzing trace with hash -2130876906, now seen corresponding path program 2 times [2024-11-12 08:19:27,857 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 08:19:27,857 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1173472653] [2024-11-12 08:19:27,857 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 08:19:27,857 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 08:19:27,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 08:19:28,144 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2024-11-12 08:19:28,144 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-12 08:19:28,145 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1173472653] [2024-11-12 08:19:28,145 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1173472653] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-12 08:19:28,145 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1687475865] [2024-11-12 08:19:28,145 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-12 08:19:28,145 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-12 08:19:28,145 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-12 08:19:28,149 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-12 08:19:28,151 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-12 08:19:28,416 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2024-11-12 08:19:28,416 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-12 08:19:28,419 INFO L256 TraceCheckSpWp]: Trace formula consists of 252 conjuncts, 5 conjuncts are in the unsatisfiable core [2024-11-12 08:19:28,421 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-12 08:19:28,529 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2024-11-12 08:19:28,529 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-12 08:19:28,531 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1687475865] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-12 08:19:28,531 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-12 08:19:28,531 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [7] total 9 [2024-11-12 08:19:28,531 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [466117379] [2024-11-12 08:19:28,531 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-12 08:19:28,531 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-12 08:19:28,532 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-12 08:19:28,532 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-12 08:19:28,532 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2024-11-12 08:19:28,533 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 31 [2024-11-12 08:19:28,533 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 37 places, 40 transitions, 192 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) [2024-11-12 08:19:28,533 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-12 08:19:28,533 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 31 [2024-11-12 08:19:28,533 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-12 08:19:28,787 INFO L124 PetriNetUnfolderBase]: 502/756 cut-off events. [2024-11-12 08:19:28,787 INFO L125 PetriNetUnfolderBase]: For 85/85 co-relation queries the response was YES. [2024-11-12 08:19:28,788 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1704 conditions, 756 events. 502/756 cut-off events. For 85/85 co-relation queries the response was YES. Maximal size of possible extension queue 42. Compared 2523 event pairs, 202 based on Foata normal form. 17/625 useless extension candidates. Maximal degree in co-relation 1615. Up to 460 conditions per place. [2024-11-12 08:19:28,791 INFO L140 encePairwiseOnDemand]: 27/31 looper letters, 63 selfloop transitions, 3 changer transitions 2/69 dead transitions. [2024-11-12 08:19:28,791 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 40 places, 69 transitions, 407 flow [2024-11-12 08:19:28,792 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-12 08:19:28,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-12 08:19:28,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 70 transitions. [2024-11-12 08:19:28,793 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5645161290322581 [2024-11-12 08:19:28,793 INFO L175 Difference]: Start difference. First operand has 37 places, 40 transitions, 192 flow. Second operand 4 states and 70 transitions. [2024-11-12 08:19:28,793 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 40 places, 69 transitions, 407 flow [2024-11-12 08:19:28,795 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 39 places, 69 transitions, 383 flow, removed 9 selfloop flow, removed 1 redundant places. [2024-11-12 08:19:28,797 INFO L231 Difference]: Finished difference. Result has 41 places, 42 transitions, 188 flow [2024-11-12 08:19:28,797 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=168, PETRI_DIFFERENCE_MINUEND_PLACES=36, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=188, PETRI_PLACES=41, PETRI_TRANSITIONS=42} [2024-11-12 08:19:28,798 INFO L279 CegarLoopForPetriNet]: 31 programPoint places, 10 predicate places. [2024-11-12 08:19:28,798 INFO L471 AbstractCegarLoop]: Abstraction has has 41 places, 42 transitions, 188 flow [2024-11-12 08:19:28,798 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) [2024-11-12 08:19:28,798 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-12 08:19:28,798 INFO L206 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-12 08:19:28,822 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2024-11-12 08:19:29,002 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2024-11-12 08:19:29,003 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-11-12 08:19:29,004 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 08:19:29,004 INFO L85 PathProgramCache]: Analyzing trace with hash 714235528, now seen corresponding path program 3 times [2024-11-12 08:19:29,004 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 08:19:29,004 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [863995751] [2024-11-12 08:19:29,004 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 08:19:29,005 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 08:19:29,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 08:19:29,212 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2024-11-12 08:19:29,213 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-12 08:19:29,213 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [863995751] [2024-11-12 08:19:29,213 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [863995751] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-12 08:19:29,213 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [231857239] [2024-11-12 08:19:29,214 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-12 08:19:29,214 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-12 08:19:29,214 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-12 08:19:29,218 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-12 08:19:29,220 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-12 08:19:29,344 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2024-11-12 08:19:29,345 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-12 08:19:29,346 INFO L256 TraceCheckSpWp]: Trace formula consists of 252 conjuncts, 5 conjuncts are in the unsatisfiable core [2024-11-12 08:19:29,348 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-12 08:19:29,394 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2024-11-12 08:19:29,394 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-12 08:19:29,395 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [231857239] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-12 08:19:29,395 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-12 08:19:29,395 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 9 [2024-11-12 08:19:29,395 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [128655695] [2024-11-12 08:19:29,398 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-12 08:19:29,398 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-12 08:19:29,398 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-12 08:19:29,399 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-12 08:19:29,399 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2024-11-12 08:19:29,399 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 31 [2024-11-12 08:19:29,400 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 42 transitions, 188 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) [2024-11-12 08:19:29,400 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-12 08:19:29,400 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 31 [2024-11-12 08:19:29,400 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-12 08:19:29,633 INFO L124 PetriNetUnfolderBase]: 560/838 cut-off events. [2024-11-12 08:19:29,633 INFO L125 PetriNetUnfolderBase]: For 440/440 co-relation queries the response was YES. [2024-11-12 08:19:29,635 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2240 conditions, 838 events. 560/838 cut-off events. For 440/440 co-relation queries the response was YES. Maximal size of possible extension queue 47. Compared 2952 event pairs, 97 based on Foata normal form. 24/740 useless extension candidates. Maximal degree in co-relation 2160. Up to 567 conditions per place. [2024-11-12 08:19:29,639 INFO L140 encePairwiseOnDemand]: 25/31 looper letters, 58 selfloop transitions, 5 changer transitions 1/65 dead transitions. [2024-11-12 08:19:29,639 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 65 transitions, 394 flow [2024-11-12 08:19:29,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-12 08:19:29,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-12 08:19:29,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 62 transitions. [2024-11-12 08:19:29,641 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5 [2024-11-12 08:19:29,641 INFO L175 Difference]: Start difference. First operand has 41 places, 42 transitions, 188 flow. Second operand 4 states and 62 transitions. [2024-11-12 08:19:29,641 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 65 transitions, 394 flow [2024-11-12 08:19:29,643 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 43 places, 65 transitions, 383 flow, removed 3 selfloop flow, removed 1 redundant places. [2024-11-12 08:19:29,644 INFO L231 Difference]: Finished difference. Result has 45 places, 44 transitions, 213 flow [2024-11-12 08:19:29,645 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=184, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=213, PETRI_PLACES=45, PETRI_TRANSITIONS=44} [2024-11-12 08:19:29,645 INFO L279 CegarLoopForPetriNet]: 31 programPoint places, 14 predicate places. [2024-11-12 08:19:29,646 INFO L471 AbstractCegarLoop]: Abstraction has has 45 places, 44 transitions, 213 flow [2024-11-12 08:19:29,646 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) [2024-11-12 08:19:29,646 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-12 08:19:29,646 INFO L206 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-12 08:19:29,667 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-11-12 08:19:29,847 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-12 08:19:29,847 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-11-12 08:19:29,848 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 08:19:29,848 INFO L85 PathProgramCache]: Analyzing trace with hash 929144618, now seen corresponding path program 4 times [2024-11-12 08:19:29,848 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 08:19:29,848 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1646365528] [2024-11-12 08:19:29,848 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 08:19:29,849 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 08:19:29,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 08:19:30,065 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2024-11-12 08:19:30,065 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-12 08:19:30,065 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1646365528] [2024-11-12 08:19:30,066 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1646365528] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-12 08:19:30,066 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [258851378] [2024-11-12 08:19:30,066 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-12 08:19:30,066 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-12 08:19:30,066 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-12 08:19:30,068 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-12 08:19:30,070 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-12 08:19:30,218 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-12 08:19:30,219 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-12 08:19:30,222 INFO L256 TraceCheckSpWp]: Trace formula consists of 375 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-12 08:19:30,224 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-12 08:19:30,310 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2024-11-12 08:19:30,311 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-12 08:19:30,394 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2024-11-12 08:19:30,394 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [258851378] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-12 08:19:30,394 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-12 08:19:30,395 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 17 [2024-11-12 08:19:30,395 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1310775608] [2024-11-12 08:19:30,395 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-12 08:19:30,395 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-11-12 08:19:30,396 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-12 08:19:30,398 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-11-12 08:19:30,398 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=166, Unknown=0, NotChecked=0, Total=272 [2024-11-12 08:19:30,398 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 31 [2024-11-12 08:19:30,399 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 44 transitions, 213 flow. Second operand has 17 states, 17 states have (on average 6.411764705882353) internal successors, (109), 17 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-12 08:19:30,399 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-12 08:19:30,399 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 31 [2024-11-12 08:19:30,399 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-12 08:19:30,659 INFO L124 PetriNetUnfolderBase]: 560/841 cut-off events. [2024-11-12 08:19:30,660 INFO L125 PetriNetUnfolderBase]: For 915/915 co-relation queries the response was YES. [2024-11-12 08:19:30,662 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2372 conditions, 841 events. 560/841 cut-off events. For 915/915 co-relation queries the response was YES. Maximal size of possible extension queue 48. Compared 2692 event pairs, 371 based on Foata normal form. 1/720 useless extension candidates. Maximal degree in co-relation 2277. Up to 825 conditions per place. [2024-11-12 08:19:30,666 INFO L140 encePairwiseOnDemand]: 24/31 looper letters, 28 selfloop transitions, 18 changer transitions 0/47 dead transitions. [2024-11-12 08:19:30,666 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 51 places, 47 transitions, 323 flow [2024-11-12 08:19:30,666 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-12 08:19:30,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-11-12 08:19:30,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 72 transitions. [2024-11-12 08:19:30,667 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.3317972350230415 [2024-11-12 08:19:30,667 INFO L175 Difference]: Start difference. First operand has 45 places, 44 transitions, 213 flow. Second operand 7 states and 72 transitions. [2024-11-12 08:19:30,667 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 51 places, 47 transitions, 323 flow [2024-11-12 08:19:30,670 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 47 transitions, 320 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-12 08:19:30,673 INFO L231 Difference]: Finished difference. Result has 51 places, 47 transitions, 278 flow [2024-11-12 08:19:30,673 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=210, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=278, PETRI_PLACES=51, PETRI_TRANSITIONS=47} [2024-11-12 08:19:30,673 INFO L279 CegarLoopForPetriNet]: 31 programPoint places, 20 predicate places. [2024-11-12 08:19:30,674 INFO L471 AbstractCegarLoop]: Abstraction has has 51 places, 47 transitions, 278 flow [2024-11-12 08:19:30,674 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 6.411764705882353) internal successors, (109), 17 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-12 08:19:30,675 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-12 08:19:30,675 INFO L206 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-12 08:19:30,693 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2024-11-12 08:19:30,875 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-12 08:19:30,876 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-11-12 08:19:30,876 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 08:19:30,876 INFO L85 PathProgramCache]: Analyzing trace with hash 549347966, now seen corresponding path program 5 times [2024-11-12 08:19:30,876 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 08:19:30,876 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [63172676] [2024-11-12 08:19:30,877 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 08:19:30,877 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 08:19:30,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 08:19:31,243 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2024-11-12 08:19:31,243 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-12 08:19:31,243 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [63172676] [2024-11-12 08:19:31,244 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [63172676] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-12 08:19:31,244 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-12 08:19:31,244 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-12 08:19:31,244 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1620547810] [2024-11-12 08:19:31,244 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-12 08:19:31,244 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-12 08:19:31,245 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-12 08:19:31,245 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-12 08:19:31,245 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-12 08:19:31,245 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 31 [2024-11-12 08:19:31,245 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 47 transitions, 278 flow. Second operand has 5 states, 5 states have (on average 8.8) internal successors, (44), 5 states have internal predecessors, (44), 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) [2024-11-12 08:19:31,245 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-12 08:19:31,245 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 31 [2024-11-12 08:19:31,246 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-12 08:19:31,620 INFO L124 PetriNetUnfolderBase]: 986/1483 cut-off events. [2024-11-12 08:19:31,620 INFO L125 PetriNetUnfolderBase]: For 1263/1263 co-relation queries the response was YES. [2024-11-12 08:19:31,623 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4091 conditions, 1483 events. 986/1483 cut-off events. For 1263/1263 co-relation queries the response was YES. Maximal size of possible extension queue 87. Compared 5997 event pairs, 359 based on Foata normal form. 16/1269 useless extension candidates. Maximal degree in co-relation 3976. Up to 869 conditions per place. [2024-11-12 08:19:31,628 INFO L140 encePairwiseOnDemand]: 26/31 looper letters, 73 selfloop transitions, 3 changer transitions 14/91 dead transitions. [2024-11-12 08:19:31,629 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 91 transitions, 635 flow [2024-11-12 08:19:31,629 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-12 08:19:31,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-12 08:19:31,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 80 transitions. [2024-11-12 08:19:31,632 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5161290322580645 [2024-11-12 08:19:31,633 INFO L175 Difference]: Start difference. First operand has 51 places, 47 transitions, 278 flow. Second operand 5 states and 80 transitions. [2024-11-12 08:19:31,633 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 91 transitions, 635 flow [2024-11-12 08:19:31,637 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 91 transitions, 599 flow, removed 6 selfloop flow, removed 4 redundant places. [2024-11-12 08:19:31,639 INFO L231 Difference]: Finished difference. Result has 54 places, 49 transitions, 264 flow [2024-11-12 08:19:31,639 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=242, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=264, PETRI_PLACES=54, PETRI_TRANSITIONS=49} [2024-11-12 08:19:31,640 INFO L279 CegarLoopForPetriNet]: 31 programPoint places, 23 predicate places. [2024-11-12 08:19:31,641 INFO L471 AbstractCegarLoop]: Abstraction has has 54 places, 49 transitions, 264 flow [2024-11-12 08:19:31,641 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 8.8) internal successors, (44), 5 states have internal predecessors, (44), 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) [2024-11-12 08:19:31,641 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-12 08:19:31,642 INFO L206 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-12 08:19:31,642 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-11-12 08:19:31,642 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-11-12 08:19:31,643 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 08:19:31,643 INFO L85 PathProgramCache]: Analyzing trace with hash -624485794, now seen corresponding path program 6 times [2024-11-12 08:19:31,643 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 08:19:31,643 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1783723388] [2024-11-12 08:19:31,643 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 08:19:31,644 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 08:19:31,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 08:19:31,949 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2024-11-12 08:19:31,950 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-12 08:19:31,950 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1783723388] [2024-11-12 08:19:31,950 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1783723388] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-12 08:19:31,950 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-12 08:19:31,950 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-12 08:19:31,950 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1998837906] [2024-11-12 08:19:31,950 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-12 08:19:31,951 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-12 08:19:31,951 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-12 08:19:31,951 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-12 08:19:31,951 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-12 08:19:31,951 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 31 [2024-11-12 08:19:31,952 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 49 transitions, 264 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) [2024-11-12 08:19:31,952 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-12 08:19:31,952 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 31 [2024-11-12 08:19:31,952 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-12 08:19:32,221 INFO L124 PetriNetUnfolderBase]: 780/1157 cut-off events. [2024-11-12 08:19:32,221 INFO L125 PetriNetUnfolderBase]: For 1701/1701 co-relation queries the response was YES. [2024-11-12 08:19:32,224 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3726 conditions, 1157 events. 780/1157 cut-off events. For 1701/1701 co-relation queries the response was YES. Maximal size of possible extension queue 64. Compared 4257 event pairs, 306 based on Foata normal form. 48/1078 useless extension candidates. Maximal degree in co-relation 3625. Up to 792 conditions per place. [2024-11-12 08:19:32,229 INFO L140 encePairwiseOnDemand]: 27/31 looper letters, 67 selfloop transitions, 6 changer transitions 2/76 dead transitions. [2024-11-12 08:19:32,229 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 76 transitions, 523 flow [2024-11-12 08:19:32,229 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-12 08:19:32,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-12 08:19:32,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 66 transitions. [2024-11-12 08:19:32,230 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.532258064516129 [2024-11-12 08:19:32,230 INFO L175 Difference]: Start difference. First operand has 54 places, 49 transitions, 264 flow. Second operand 4 states and 66 transitions. [2024-11-12 08:19:32,231 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 76 transitions, 523 flow [2024-11-12 08:19:32,233 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 76 transitions, 506 flow, removed 6 selfloop flow, removed 2 redundant places. [2024-11-12 08:19:32,235 INFO L231 Difference]: Finished difference. Result has 55 places, 50 transitions, 281 flow [2024-11-12 08:19:32,235 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=258, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=281, PETRI_PLACES=55, PETRI_TRANSITIONS=50} [2024-11-12 08:19:32,237 INFO L279 CegarLoopForPetriNet]: 31 programPoint places, 24 predicate places. [2024-11-12 08:19:32,238 INFO L471 AbstractCegarLoop]: Abstraction has has 55 places, 50 transitions, 281 flow [2024-11-12 08:19:32,238 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) [2024-11-12 08:19:32,239 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-12 08:19:32,239 INFO L206 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-12 08:19:32,239 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-11-12 08:19:32,239 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-11-12 08:19:32,240 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 08:19:32,241 INFO L85 PathProgramCache]: Analyzing trace with hash -745873431, now seen corresponding path program 1 times [2024-11-12 08:19:32,242 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 08:19:32,242 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1488701195] [2024-11-12 08:19:32,242 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 08:19:32,242 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 08:19:32,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 08:19:32,626 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2024-11-12 08:19:32,626 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-12 08:19:32,626 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1488701195] [2024-11-12 08:19:32,626 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1488701195] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-12 08:19:32,626 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-12 08:19:32,626 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-12 08:19:32,627 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1387921113] [2024-11-12 08:19:32,627 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-12 08:19:32,627 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-12 08:19:32,627 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-12 08:19:32,627 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-12 08:19:32,628 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-12 08:19:32,628 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 31 [2024-11-12 08:19:32,628 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 50 transitions, 281 flow. Second operand has 5 states, 5 states have (on average 9.0) internal successors, (45), 5 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-12 08:19:32,628 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-12 08:19:32,628 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 31 [2024-11-12 08:19:32,628 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-12 08:19:32,986 INFO L124 PetriNetUnfolderBase]: 952/1406 cut-off events. [2024-11-12 08:19:32,987 INFO L125 PetriNetUnfolderBase]: For 2545/2545 co-relation queries the response was YES. [2024-11-12 08:19:32,992 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4581 conditions, 1406 events. 952/1406 cut-off events. For 2545/2545 co-relation queries the response was YES. Maximal size of possible extension queue 88. Compared 5444 event pairs, 267 based on Foata normal form. 24/1287 useless extension candidates. Maximal degree in co-relation 4480. Up to 728 conditions per place. [2024-11-12 08:19:32,998 INFO L140 encePairwiseOnDemand]: 26/31 looper letters, 82 selfloop transitions, 6 changer transitions 0/89 dead transitions. [2024-11-12 08:19:32,998 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 89 transitions, 635 flow [2024-11-12 08:19:32,999 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-12 08:19:32,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-12 08:19:32,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 80 transitions. [2024-11-12 08:19:32,999 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5161290322580645 [2024-11-12 08:19:32,999 INFO L175 Difference]: Start difference. First operand has 55 places, 50 transitions, 281 flow. Second operand 5 states and 80 transitions. [2024-11-12 08:19:33,000 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 89 transitions, 635 flow [2024-11-12 08:19:33,005 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 89 transitions, 595 flow, removed 6 selfloop flow, removed 3 redundant places. [2024-11-12 08:19:33,006 INFO L231 Difference]: Finished difference. Result has 58 places, 53 transitions, 307 flow [2024-11-12 08:19:33,007 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=265, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=307, PETRI_PLACES=58, PETRI_TRANSITIONS=53} [2024-11-12 08:19:33,008 INFO L279 CegarLoopForPetriNet]: 31 programPoint places, 27 predicate places. [2024-11-12 08:19:33,008 INFO L471 AbstractCegarLoop]: Abstraction has has 58 places, 53 transitions, 307 flow [2024-11-12 08:19:33,008 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 9.0) internal successors, (45), 5 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-12 08:19:33,008 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-12 08:19:33,008 INFO L206 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-12 08:19:33,008 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-11-12 08:19:33,008 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-11-12 08:19:33,009 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 08:19:33,009 INFO L85 PathProgramCache]: Analyzing trace with hash 1741191669, now seen corresponding path program 2 times [2024-11-12 08:19:33,009 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 08:19:33,009 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1455961577] [2024-11-12 08:19:33,009 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 08:19:33,009 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 08:19:33,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 08:19:33,362 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2024-11-12 08:19:33,362 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-12 08:19:33,363 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1455961577] [2024-11-12 08:19:33,363 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1455961577] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-12 08:19:33,363 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1468272144] [2024-11-12 08:19:33,363 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-12 08:19:33,363 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-12 08:19:33,363 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-12 08:19:33,365 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-12 08:19:33,366 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-12 08:19:33,542 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-12 08:19:33,542 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-12 08:19:33,545 INFO L256 TraceCheckSpWp]: Trace formula consists of 417 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-11-12 08:19:33,547 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-12 08:19:33,589 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2024-11-12 08:19:33,590 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-12 08:19:33,636 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2024-11-12 08:19:33,636 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1468272144] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-12 08:19:33,637 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-11-12 08:19:33,637 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5, 5] total 8 [2024-11-12 08:19:33,637 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2082737671] [2024-11-12 08:19:33,637 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-12 08:19:33,637 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-12 08:19:33,637 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-12 08:19:33,638 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-12 08:19:33,638 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-11-12 08:19:33,638 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 31 [2024-11-12 08:19:33,638 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 53 transitions, 307 flow. Second operand has 5 states, 5 states have (on average 9.0) internal successors, (45), 5 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-12 08:19:33,638 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-12 08:19:33,638 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 31 [2024-11-12 08:19:33,638 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-12 08:19:33,991 INFO L124 PetriNetUnfolderBase]: 1006/1482 cut-off events. [2024-11-12 08:19:33,991 INFO L125 PetriNetUnfolderBase]: For 2857/2857 co-relation queries the response was YES. [2024-11-12 08:19:33,995 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5106 conditions, 1482 events. 1006/1482 cut-off events. For 2857/2857 co-relation queries the response was YES. Maximal size of possible extension queue 94. Compared 5652 event pairs, 158 based on Foata normal form. 22/1357 useless extension candidates. Maximal degree in co-relation 5003. Up to 615 conditions per place. [2024-11-12 08:19:34,001 INFO L140 encePairwiseOnDemand]: 24/31 looper letters, 86 selfloop transitions, 8 changer transitions 4/99 dead transitions. [2024-11-12 08:19:34,001 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 99 transitions, 747 flow [2024-11-12 08:19:34,002 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-12 08:19:34,002 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-12 08:19:34,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 76 transitions. [2024-11-12 08:19:34,002 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.49032258064516127 [2024-11-12 08:19:34,002 INFO L175 Difference]: Start difference. First operand has 58 places, 53 transitions, 307 flow. Second operand 5 states and 76 transitions. [2024-11-12 08:19:34,002 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 99 transitions, 747 flow [2024-11-12 08:19:34,007 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 99 transitions, 735 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-12 08:19:34,008 INFO L231 Difference]: Finished difference. Result has 63 places, 56 transitions, 361 flow [2024-11-12 08:19:34,008 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=303, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=53, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=361, PETRI_PLACES=63, PETRI_TRANSITIONS=56} [2024-11-12 08:19:34,009 INFO L279 CegarLoopForPetriNet]: 31 programPoint places, 32 predicate places. [2024-11-12 08:19:34,009 INFO L471 AbstractCegarLoop]: Abstraction has has 63 places, 56 transitions, 361 flow [2024-11-12 08:19:34,009 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 9.0) internal successors, (45), 5 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-12 08:19:34,009 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-12 08:19:34,009 INFO L206 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-12 08:19:34,027 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-11-12 08:19:34,213 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2024-11-12 08:19:34,214 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-11-12 08:19:34,214 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 08:19:34,214 INFO L85 PathProgramCache]: Analyzing trace with hash 936504855, now seen corresponding path program 3 times [2024-11-12 08:19:34,214 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 08:19:34,215 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [726132384] [2024-11-12 08:19:34,215 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 08:19:34,215 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 08:19:34,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 08:19:34,618 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2024-11-12 08:19:34,618 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-12 08:19:34,618 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [726132384] [2024-11-12 08:19:34,618 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [726132384] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-12 08:19:34,618 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-12 08:19:34,619 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-12 08:19:34,619 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [686269865] [2024-11-12 08:19:34,619 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-12 08:19:34,619 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-12 08:19:34,619 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-12 08:19:34,620 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-12 08:19:34,620 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-12 08:19:34,620 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 31 [2024-11-12 08:19:34,620 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 56 transitions, 361 flow. Second operand has 5 states, 5 states have (on average 9.0) internal successors, (45), 5 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-12 08:19:34,620 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-12 08:19:34,620 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 31 [2024-11-12 08:19:34,621 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-12 08:19:34,985 INFO L124 PetriNetUnfolderBase]: 962/1411 cut-off events. [2024-11-12 08:19:34,985 INFO L125 PetriNetUnfolderBase]: For 3388/3388 co-relation queries the response was YES. [2024-11-12 08:19:34,990 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5072 conditions, 1411 events. 962/1411 cut-off events. For 3388/3388 co-relation queries the response was YES. Maximal size of possible extension queue 89. Compared 5353 event pairs, 285 based on Foata normal form. 22/1290 useless extension candidates. Maximal degree in co-relation 4966. Up to 750 conditions per place. [2024-11-12 08:19:34,996 INFO L140 encePairwiseOnDemand]: 26/31 looper letters, 77 selfloop transitions, 10 changer transitions 4/92 dead transitions. [2024-11-12 08:19:34,996 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 92 transitions, 697 flow [2024-11-12 08:19:34,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-12 08:19:34,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-12 08:19:34,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 81 transitions. [2024-11-12 08:19:34,998 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5225806451612903 [2024-11-12 08:19:34,998 INFO L175 Difference]: Start difference. First operand has 63 places, 56 transitions, 361 flow. Second operand 5 states and 81 transitions. [2024-11-12 08:19:34,998 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 92 transitions, 697 flow [2024-11-12 08:19:35,004 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 92 transitions, 682 flow, removed 3 selfloop flow, removed 2 redundant places. [2024-11-12 08:19:35,006 INFO L231 Difference]: Finished difference. Result has 66 places, 57 transitions, 379 flow [2024-11-12 08:19:35,006 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=352, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=56, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=379, PETRI_PLACES=66, PETRI_TRANSITIONS=57} [2024-11-12 08:19:35,007 INFO L279 CegarLoopForPetriNet]: 31 programPoint places, 35 predicate places. [2024-11-12 08:19:35,007 INFO L471 AbstractCegarLoop]: Abstraction has has 66 places, 57 transitions, 379 flow [2024-11-12 08:19:35,007 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 9.0) internal successors, (45), 5 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-12 08:19:35,007 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-12 08:19:35,007 INFO L206 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-12 08:19:35,008 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-11-12 08:19:35,008 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-11-12 08:19:35,008 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 08:19:35,008 INFO L85 PathProgramCache]: Analyzing trace with hash -842471149, now seen corresponding path program 4 times [2024-11-12 08:19:35,009 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 08:19:35,009 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1721730183] [2024-11-12 08:19:35,009 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 08:19:35,009 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 08:19:35,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 08:19:35,315 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2024-11-12 08:19:35,316 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-12 08:19:35,316 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1721730183] [2024-11-12 08:19:35,316 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1721730183] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-12 08:19:35,316 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-12 08:19:35,316 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-12 08:19:35,316 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1532317086] [2024-11-12 08:19:35,317 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-12 08:19:35,317 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-12 08:19:35,317 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-12 08:19:35,317 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-12 08:19:35,317 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-12 08:19:35,317 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 31 [2024-11-12 08:19:35,318 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 57 transitions, 379 flow. Second operand has 5 states, 5 states have (on average 9.0) internal successors, (45), 5 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-12 08:19:35,318 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-12 08:19:35,318 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 31 [2024-11-12 08:19:35,318 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-12 08:19:35,679 INFO L124 PetriNetUnfolderBase]: 894/1318 cut-off events. [2024-11-12 08:19:35,679 INFO L125 PetriNetUnfolderBase]: For 3649/3649 co-relation queries the response was YES. [2024-11-12 08:19:35,684 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4880 conditions, 1318 events. 894/1318 cut-off events. For 3649/3649 co-relation queries the response was YES. Maximal size of possible extension queue 81. Compared 4807 event pairs, 240 based on Foata normal form. 24/1203 useless extension candidates. Maximal degree in co-relation 4773. Up to 753 conditions per place. [2024-11-12 08:19:35,691 INFO L140 encePairwiseOnDemand]: 26/31 looper letters, 90 selfloop transitions, 10 changer transitions 15/116 dead transitions. [2024-11-12 08:19:35,691 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 116 transitions, 895 flow [2024-11-12 08:19:35,692 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-12 08:19:35,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-11-12 08:19:35,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 103 transitions. [2024-11-12 08:19:35,693 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.47465437788018433 [2024-11-12 08:19:35,693 INFO L175 Difference]: Start difference. First operand has 66 places, 57 transitions, 379 flow. Second operand 7 states and 103 transitions. [2024-11-12 08:19:35,693 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 116 transitions, 895 flow [2024-11-12 08:19:35,701 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 116 transitions, 861 flow, removed 4 selfloop flow, removed 4 redundant places. [2024-11-12 08:19:35,704 INFO L231 Difference]: Finished difference. Result has 69 places, 62 transitions, 436 flow [2024-11-12 08:19:35,704 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=355, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=57, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=436, PETRI_PLACES=69, PETRI_TRANSITIONS=62} [2024-11-12 08:19:35,705 INFO L279 CegarLoopForPetriNet]: 31 programPoint places, 38 predicate places. [2024-11-12 08:19:35,705 INFO L471 AbstractCegarLoop]: Abstraction has has 69 places, 62 transitions, 436 flow [2024-11-12 08:19:35,705 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 9.0) internal successors, (45), 5 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-12 08:19:35,705 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-12 08:19:35,705 INFO L206 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-12 08:19:35,705 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-11-12 08:19:35,706 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-11-12 08:19:35,706 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 08:19:35,706 INFO L85 PathProgramCache]: Analyzing trace with hash -891836861, now seen corresponding path program 5 times [2024-11-12 08:19:35,706 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 08:19:35,706 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [914750968] [2024-11-12 08:19:35,706 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 08:19:35,707 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 08:19:35,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 08:19:36,055 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2024-11-12 08:19:36,056 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-12 08:19:36,056 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [914750968] [2024-11-12 08:19:36,056 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [914750968] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-12 08:19:36,056 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-12 08:19:36,056 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-12 08:19:36,056 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1938686483] [2024-11-12 08:19:36,056 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-12 08:19:36,057 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-12 08:19:36,058 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-12 08:19:36,058 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-12 08:19:36,058 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-12 08:19:36,059 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 31 [2024-11-12 08:19:36,059 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 62 transitions, 436 flow. Second operand has 5 states, 5 states have (on average 9.0) internal successors, (45), 5 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-12 08:19:36,061 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-12 08:19:36,061 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 31 [2024-11-12 08:19:36,061 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-12 08:19:36,390 INFO L124 PetriNetUnfolderBase]: 770/1120 cut-off events. [2024-11-12 08:19:36,390 INFO L125 PetriNetUnfolderBase]: For 3112/3112 co-relation queries the response was YES. [2024-11-12 08:19:36,393 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4166 conditions, 1120 events. 770/1120 cut-off events. For 3112/3112 co-relation queries the response was YES. Maximal size of possible extension queue 68. Compared 3866 event pairs, 216 based on Foata normal form. 22/1015 useless extension candidates. Maximal degree in co-relation 4058. Up to 695 conditions per place. [2024-11-12 08:19:36,399 INFO L140 encePairwiseOnDemand]: 26/31 looper letters, 79 selfloop transitions, 9 changer transitions 3/92 dead transitions. [2024-11-12 08:19:36,399 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 92 transitions, 736 flow [2024-11-12 08:19:36,399 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-12 08:19:36,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-12 08:19:36,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 75 transitions. [2024-11-12 08:19:36,401 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4838709677419355 [2024-11-12 08:19:36,401 INFO L175 Difference]: Start difference. First operand has 69 places, 62 transitions, 436 flow. Second operand 5 states and 75 transitions. [2024-11-12 08:19:36,401 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 92 transitions, 736 flow [2024-11-12 08:19:36,408 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 92 transitions, 700 flow, removed 8 selfloop flow, removed 5 redundant places. [2024-11-12 08:19:36,410 INFO L231 Difference]: Finished difference. Result has 65 places, 61 transitions, 407 flow [2024-11-12 08:19:36,410 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=389, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=61, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=407, PETRI_PLACES=65, PETRI_TRANSITIONS=61} [2024-11-12 08:19:36,411 INFO L279 CegarLoopForPetriNet]: 31 programPoint places, 34 predicate places. [2024-11-12 08:19:36,411 INFO L471 AbstractCegarLoop]: Abstraction has has 65 places, 61 transitions, 407 flow [2024-11-12 08:19:36,412 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 9.0) internal successors, (45), 5 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-12 08:19:36,412 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-12 08:19:36,412 INFO L206 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-12 08:19:36,412 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-11-12 08:19:36,412 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-11-12 08:19:36,413 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 08:19:36,413 INFO L85 PathProgramCache]: Analyzing trace with hash 748145069, now seen corresponding path program 1 times [2024-11-12 08:19:36,413 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 08:19:36,413 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [43274937] [2024-11-12 08:19:36,413 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 08:19:36,413 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 08:19:36,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 08:19:37,675 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2024-11-12 08:19:37,675 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-12 08:19:37,675 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [43274937] [2024-11-12 08:19:37,676 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [43274937] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-12 08:19:37,676 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [508439223] [2024-11-12 08:19:37,676 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 08:19:37,676 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-12 08:19:37,676 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-12 08:19:37,678 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-12 08:19:37,681 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-11-12 08:19:37,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 08:19:37,849 INFO L256 TraceCheckSpWp]: Trace formula consists of 432 conjuncts, 22 conjuncts are in the unsatisfiable core [2024-11-12 08:19:37,852 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-12 08:19:38,110 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-12 08:19:38,110 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 40 treesize of output 52 [2024-11-12 08:19:38,212 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2024-11-12 08:19:38,213 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-12 08:19:38,696 INFO L349 Elim1Store]: treesize reduction 32, result has 73.6 percent of original size [2024-11-12 08:19:38,696 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 46 treesize of output 102 [2024-11-12 08:19:38,833 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2024-11-12 08:19:38,833 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [508439223] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-12 08:19:38,833 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-12 08:19:38,833 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11, 9] total 30 [2024-11-12 08:19:38,833 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [353394551] [2024-11-12 08:19:38,833 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-12 08:19:38,834 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2024-11-12 08:19:38,834 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-12 08:19:38,834 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2024-11-12 08:19:38,836 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=755, Unknown=0, NotChecked=0, Total=870 [2024-11-12 08:19:38,836 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 31 [2024-11-12 08:19:38,837 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 61 transitions, 407 flow. Second operand has 30 states, 30 states have (on average 6.233333333333333) internal successors, (187), 30 states have internal predecessors, (187), 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) [2024-11-12 08:19:38,837 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-12 08:19:38,837 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 31 [2024-11-12 08:19:38,837 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-12 08:19:40,594 INFO L124 PetriNetUnfolderBase]: 1866/2721 cut-off events. [2024-11-12 08:19:40,596 INFO L125 PetriNetUnfolderBase]: For 5593/5593 co-relation queries the response was YES. [2024-11-12 08:19:40,604 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9583 conditions, 2721 events. 1866/2721 cut-off events. For 5593/5593 co-relation queries the response was YES. Maximal size of possible extension queue 160. Compared 11999 event pairs, 161 based on Foata normal form. 1/2313 useless extension candidates. Maximal degree in co-relation 9477. Up to 877 conditions per place. [2024-11-12 08:19:40,622 INFO L140 encePairwiseOnDemand]: 18/31 looper letters, 147 selfloop transitions, 81 changer transitions 14/243 dead transitions. [2024-11-12 08:19:40,623 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 84 places, 243 transitions, 1856 flow [2024-11-12 08:19:40,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2024-11-12 08:19:40,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2024-11-12 08:19:40,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 252 transitions. [2024-11-12 08:19:40,625 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4064516129032258 [2024-11-12 08:19:40,625 INFO L175 Difference]: Start difference. First operand has 65 places, 61 transitions, 407 flow. Second operand 20 states and 252 transitions. [2024-11-12 08:19:40,625 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 84 places, 243 transitions, 1856 flow [2024-11-12 08:19:40,634 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 80 places, 243 transitions, 1762 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-11-12 08:19:40,638 INFO L231 Difference]: Finished difference. Result has 87 places, 141 transitions, 1247 flow [2024-11-12 08:19:40,638 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=389, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=61, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=1247, PETRI_PLACES=87, PETRI_TRANSITIONS=141} [2024-11-12 08:19:40,638 INFO L279 CegarLoopForPetriNet]: 31 programPoint places, 56 predicate places. [2024-11-12 08:19:40,639 INFO L471 AbstractCegarLoop]: Abstraction has has 87 places, 141 transitions, 1247 flow [2024-11-12 08:19:40,639 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 6.233333333333333) internal successors, (187), 30 states have internal predecessors, (187), 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) [2024-11-12 08:19:40,639 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-12 08:19:40,639 INFO L206 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-12 08:19:40,656 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2024-11-12 08:19:40,839 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-12 08:19:40,840 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-11-12 08:19:40,840 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 08:19:40,841 INFO L85 PathProgramCache]: Analyzing trace with hash 989591081, now seen corresponding path program 2 times [2024-11-12 08:19:40,841 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 08:19:40,841 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [672821599] [2024-11-12 08:19:40,841 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 08:19:40,841 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 08:19:40,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 08:19:42,032 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2024-11-12 08:19:42,033 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-12 08:19:42,033 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [672821599] [2024-11-12 08:19:42,033 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [672821599] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-12 08:19:42,033 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1761714782] [2024-11-12 08:19:42,033 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-12 08:19:42,033 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-12 08:19:42,033 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-12 08:19:42,053 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-12 08:19:42,054 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-11-12 08:19:42,220 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-12 08:19:42,220 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-12 08:19:42,222 INFO L256 TraceCheckSpWp]: Trace formula consists of 432 conjuncts, 32 conjuncts are in the unsatisfiable core [2024-11-12 08:19:42,225 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-12 08:19:42,692 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-12 08:19:42,692 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 80 treesize of output 120 [2024-11-12 08:19:42,828 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2024-11-12 08:19:42,828 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-12 08:19:43,255 INFO L349 Elim1Store]: treesize reduction 32, result has 73.6 percent of original size [2024-11-12 08:19:43,255 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 46 treesize of output 102 [2024-11-12 08:19:43,362 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2024-11-12 08:19:43,363 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1761714782] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-12 08:19:43,363 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-12 08:19:43,363 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 9] total 29 [2024-11-12 08:19:43,363 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [429443068] [2024-11-12 08:19:43,363 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-12 08:19:43,364 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2024-11-12 08:19:43,364 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-12 08:19:43,364 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2024-11-12 08:19:43,365 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=703, Unknown=0, NotChecked=0, Total=812 [2024-11-12 08:19:43,365 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 31 [2024-11-12 08:19:43,365 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 87 places, 141 transitions, 1247 flow. Second operand has 29 states, 29 states have (on average 6.206896551724138) internal successors, (180), 29 states have internal predecessors, (180), 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) [2024-11-12 08:19:43,365 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-12 08:19:43,365 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 31 [2024-11-12 08:19:43,366 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-12 08:19:44,996 INFO L124 PetriNetUnfolderBase]: 1998/2925 cut-off events. [2024-11-12 08:19:44,996 INFO L125 PetriNetUnfolderBase]: For 9580/9580 co-relation queries the response was YES. [2024-11-12 08:19:45,006 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12576 conditions, 2925 events. 1998/2925 cut-off events. For 9580/9580 co-relation queries the response was YES. Maximal size of possible extension queue 176. Compared 13167 event pairs, 213 based on Foata normal form. 2/2889 useless extension candidates. Maximal degree in co-relation 12461. Up to 938 conditions per place. [2024-11-12 08:19:45,017 INFO L140 encePairwiseOnDemand]: 18/31 looper letters, 143 selfloop transitions, 90 changer transitions 15/249 dead transitions. [2024-11-12 08:19:45,017 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 106 places, 249 transitions, 2221 flow [2024-11-12 08:19:45,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2024-11-12 08:19:45,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2024-11-12 08:19:45,021 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 247 transitions. [2024-11-12 08:19:45,021 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.39838709677419354 [2024-11-12 08:19:45,021 INFO L175 Difference]: Start difference. First operand has 87 places, 141 transitions, 1247 flow. Second operand 20 states and 247 transitions. [2024-11-12 08:19:45,021 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 106 places, 249 transitions, 2221 flow [2024-11-12 08:19:45,055 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 104 places, 249 transitions, 2166 flow, removed 26 selfloop flow, removed 2 redundant places. [2024-11-12 08:19:45,057 INFO L231 Difference]: Finished difference. Result has 108 places, 153 transitions, 1509 flow [2024-11-12 08:19:45,058 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1196, PETRI_DIFFERENCE_MINUEND_PLACES=85, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=141, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=79, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=1509, PETRI_PLACES=108, PETRI_TRANSITIONS=153} [2024-11-12 08:19:45,058 INFO L279 CegarLoopForPetriNet]: 31 programPoint places, 77 predicate places. [2024-11-12 08:19:45,058 INFO L471 AbstractCegarLoop]: Abstraction has has 108 places, 153 transitions, 1509 flow [2024-11-12 08:19:45,059 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 6.206896551724138) internal successors, (180), 29 states have internal predecessors, (180), 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) [2024-11-12 08:19:45,059 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-12 08:19:45,059 INFO L206 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-12 08:19:45,072 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2024-11-12 08:19:45,260 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-12 08:19:45,260 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-11-12 08:19:45,261 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 08:19:45,261 INFO L85 PathProgramCache]: Analyzing trace with hash 1147447781, now seen corresponding path program 3 times [2024-11-12 08:19:45,261 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 08:19:45,261 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [218022391] [2024-11-12 08:19:45,261 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 08:19:45,261 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 08:19:45,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 08:19:46,348 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2024-11-12 08:19:46,349 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-12 08:19:46,349 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [218022391] [2024-11-12 08:19:46,349 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [218022391] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-12 08:19:46,349 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1679909964] [2024-11-12 08:19:46,349 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-12 08:19:46,349 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-12 08:19:46,350 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-12 08:19:46,351 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-12 08:19:46,353 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-11-12 08:19:46,553 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-11-12 08:19:46,553 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-12 08:19:46,556 INFO L256 TraceCheckSpWp]: Trace formula consists of 351 conjuncts, 32 conjuncts are in the unsatisfiable core [2024-11-12 08:19:46,558 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-12 08:19:46,849 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-12 08:19:46,850 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 59 treesize of output 75 [2024-11-12 08:19:46,977 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2024-11-12 08:19:46,977 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-12 08:19:47,372 INFO L349 Elim1Store]: treesize reduction 32, result has 73.6 percent of original size [2024-11-12 08:19:47,373 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 46 treesize of output 102 [2024-11-12 08:19:47,516 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2024-11-12 08:19:47,516 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1679909964] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-12 08:19:47,516 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-12 08:19:47,516 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 9] total 29 [2024-11-12 08:19:47,517 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1817859533] [2024-11-12 08:19:47,517 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-12 08:19:47,517 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2024-11-12 08:19:47,517 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-12 08:19:47,518 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2024-11-12 08:19:47,518 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=699, Unknown=0, NotChecked=0, Total=812 [2024-11-12 08:19:47,518 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 31 [2024-11-12 08:19:47,519 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 108 places, 153 transitions, 1509 flow. Second operand has 29 states, 29 states have (on average 6.206896551724138) internal successors, (180), 29 states have internal predecessors, (180), 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) [2024-11-12 08:19:47,519 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-12 08:19:47,519 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 31 [2024-11-12 08:19:47,519 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-12 08:19:49,325 INFO L124 PetriNetUnfolderBase]: 2232/3262 cut-off events. [2024-11-12 08:19:49,325 INFO L125 PetriNetUnfolderBase]: For 14260/14260 co-relation queries the response was YES. [2024-11-12 08:19:49,336 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15667 conditions, 3262 events. 2232/3262 cut-off events. For 14260/14260 co-relation queries the response was YES. Maximal size of possible extension queue 200. Compared 14980 event pairs, 224 based on Foata normal form. 1/3225 useless extension candidates. Maximal degree in co-relation 15548. Up to 1040 conditions per place. [2024-11-12 08:19:49,347 INFO L140 encePairwiseOnDemand]: 18/31 looper letters, 159 selfloop transitions, 103 changer transitions 19/282 dead transitions. [2024-11-12 08:19:49,348 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 130 places, 282 transitions, 2732 flow [2024-11-12 08:19:49,348 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2024-11-12 08:19:49,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2024-11-12 08:19:49,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 284 transitions. [2024-11-12 08:19:49,349 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.39831697054698456 [2024-11-12 08:19:49,349 INFO L175 Difference]: Start difference. First operand has 108 places, 153 transitions, 1509 flow. Second operand 23 states and 284 transitions. [2024-11-12 08:19:49,350 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 130 places, 282 transitions, 2732 flow [2024-11-12 08:19:49,406 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 117 places, 282 transitions, 2589 flow, removed 10 selfloop flow, removed 13 redundant places. [2024-11-12 08:19:49,410 INFO L231 Difference]: Finished difference. Result has 122 places, 170 transitions, 1776 flow [2024-11-12 08:19:49,410 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1375, PETRI_DIFFERENCE_MINUEND_PLACES=95, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=153, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=86, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=1776, PETRI_PLACES=122, PETRI_TRANSITIONS=170} [2024-11-12 08:19:49,411 INFO L279 CegarLoopForPetriNet]: 31 programPoint places, 91 predicate places. [2024-11-12 08:19:49,411 INFO L471 AbstractCegarLoop]: Abstraction has has 122 places, 170 transitions, 1776 flow [2024-11-12 08:19:49,411 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 6.206896551724138) internal successors, (180), 29 states have internal predecessors, (180), 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) [2024-11-12 08:19:49,412 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-12 08:19:49,412 INFO L206 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-12 08:19:49,430 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2024-11-12 08:19:49,615 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2024-11-12 08:19:49,616 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-11-12 08:19:49,616 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 08:19:49,616 INFO L85 PathProgramCache]: Analyzing trace with hash 920365107, now seen corresponding path program 4 times [2024-11-12 08:19:49,617 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 08:19:49,617 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1892444246] [2024-11-12 08:19:49,617 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 08:19:49,617 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 08:19:49,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 08:19:50,839 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2024-11-12 08:19:50,839 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-12 08:19:50,839 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1892444246] [2024-11-12 08:19:50,839 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1892444246] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-12 08:19:50,839 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1070262638] [2024-11-12 08:19:50,840 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-12 08:19:50,840 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-12 08:19:50,840 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-12 08:19:50,842 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-12 08:19:50,843 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-11-12 08:19:51,011 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-12 08:19:51,011 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-12 08:19:51,013 INFO L256 TraceCheckSpWp]: Trace formula consists of 432 conjuncts, 22 conjuncts are in the unsatisfiable core [2024-11-12 08:19:51,015 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-12 08:19:51,194 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-12 08:19:51,194 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 40 treesize of output 52 [2024-11-12 08:19:51,235 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2024-11-12 08:19:51,235 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-12 08:19:51,639 INFO L349 Elim1Store]: treesize reduction 8, result has 96.1 percent of original size [2024-11-12 08:19:51,639 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 56 treesize of output 212 [2024-11-12 08:19:56,270 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2024-11-12 08:19:56,270 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1070262638] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-12 08:19:56,270 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-12 08:19:56,271 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11, 9] total 29 [2024-11-12 08:19:56,271 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [192368177] [2024-11-12 08:19:56,271 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-12 08:19:56,271 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2024-11-12 08:19:56,272 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-12 08:19:56,272 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2024-11-12 08:19:56,272 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=709, Unknown=0, NotChecked=0, Total=812 [2024-11-12 08:19:56,273 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 31 [2024-11-12 08:19:56,273 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 122 places, 170 transitions, 1776 flow. Second operand has 29 states, 29 states have (on average 6.172413793103448) internal successors, (179), 29 states have internal predecessors, (179), 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) [2024-11-12 08:19:56,273 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-12 08:19:56,273 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 31 [2024-11-12 08:19:56,273 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-12 08:19:58,730 INFO L124 PetriNetUnfolderBase]: 3508/5084 cut-off events. [2024-11-12 08:19:58,731 INFO L125 PetriNetUnfolderBase]: For 26558/26558 co-relation queries the response was YES. [2024-11-12 08:19:58,756 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25666 conditions, 5084 events. 3508/5084 cut-off events. For 26558/26558 co-relation queries the response was YES. Maximal size of possible extension queue 322. Compared 25118 event pairs, 323 based on Foata normal form. 1/5069 useless extension candidates. Maximal degree in co-relation 25542. Up to 2475 conditions per place. [2024-11-12 08:19:58,783 INFO L140 encePairwiseOnDemand]: 19/31 looper letters, 212 selfloop transitions, 178 changer transitions 74/465 dead transitions. [2024-11-12 08:19:58,783 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 153 places, 465 transitions, 5032 flow [2024-11-12 08:19:58,785 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2024-11-12 08:19:58,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2024-11-12 08:19:58,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 384 transitions. [2024-11-12 08:19:58,792 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.3870967741935484 [2024-11-12 08:19:58,793 INFO L175 Difference]: Start difference. First operand has 122 places, 170 transitions, 1776 flow. Second operand 32 states and 384 transitions. [2024-11-12 08:19:58,793 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 153 places, 465 transitions, 5032 flow [2024-11-12 08:19:58,938 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 139 places, 465 transitions, 4783 flow, removed 46 selfloop flow, removed 14 redundant places. [2024-11-12 08:19:58,946 INFO L231 Difference]: Finished difference. Result has 158 places, 273 transitions, 3408 flow [2024-11-12 08:19:58,947 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1646, PETRI_DIFFERENCE_MINUEND_PLACES=108, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=170, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=91, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=32, PETRI_FLOW=3408, PETRI_PLACES=158, PETRI_TRANSITIONS=273} [2024-11-12 08:19:58,947 INFO L279 CegarLoopForPetriNet]: 31 programPoint places, 127 predicate places. [2024-11-12 08:19:58,947 INFO L471 AbstractCegarLoop]: Abstraction has has 158 places, 273 transitions, 3408 flow [2024-11-12 08:19:58,948 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 6.172413793103448) internal successors, (179), 29 states have internal predecessors, (179), 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) [2024-11-12 08:19:58,948 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-12 08:19:58,948 INFO L206 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-12 08:19:58,970 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2024-11-12 08:19:59,148 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2024-11-12 08:19:59,149 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-11-12 08:19:59,149 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 08:19:59,149 INFO L85 PathProgramCache]: Analyzing trace with hash 1764544779, now seen corresponding path program 5 times [2024-11-12 08:19:59,150 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 08:19:59,150 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [342304919] [2024-11-12 08:19:59,150 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 08:19:59,150 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 08:19:59,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 08:20:00,216 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2024-11-12 08:20:00,217 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-12 08:20:00,217 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [342304919] [2024-11-12 08:20:00,217 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [342304919] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-12 08:20:00,217 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1821898785] [2024-11-12 08:20:00,217 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-12 08:20:00,217 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-12 08:20:00,218 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-12 08:20:00,219 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-12 08:20:00,221 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-11-12 08:20:00,765 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2024-11-12 08:20:00,765 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-12 08:20:00,771 INFO L256 TraceCheckSpWp]: Trace formula consists of 432 conjuncts, 36 conjuncts are in the unsatisfiable core [2024-11-12 08:20:00,773 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-12 08:20:01,036 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-12 08:20:01,037 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 40 treesize of output 48 [2024-11-12 08:20:01,054 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2024-11-12 08:20:01,054 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-12 08:20:01,367 INFO L349 Elim1Store]: treesize reduction 32, result has 73.6 percent of original size [2024-11-12 08:20:01,368 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 46 treesize of output 102 [2024-11-12 08:20:01,539 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2024-11-12 08:20:01,539 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1821898785] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-12 08:20:01,539 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-12 08:20:01,539 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 9] total 30 [2024-11-12 08:20:01,539 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1577251231] [2024-11-12 08:20:01,539 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-12 08:20:01,540 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2024-11-12 08:20:01,540 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-12 08:20:01,540 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2024-11-12 08:20:01,541 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=748, Unknown=0, NotChecked=0, Total=870 [2024-11-12 08:20:01,541 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 31 [2024-11-12 08:20:01,541 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 158 places, 273 transitions, 3408 flow. Second operand has 30 states, 30 states have (on average 6.333333333333333) internal successors, (190), 30 states have internal predecessors, (190), 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) [2024-11-12 08:20:01,541 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-12 08:20:01,541 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 31 [2024-11-12 08:20:01,542 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-12 08:20:03,166 INFO L124 PetriNetUnfolderBase]: 2944/4324 cut-off events. [2024-11-12 08:20:03,166 INFO L125 PetriNetUnfolderBase]: For 84450/84450 co-relation queries the response was YES. [2024-11-12 08:20:03,186 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32869 conditions, 4324 events. 2944/4324 cut-off events. For 84450/84450 co-relation queries the response was YES. Maximal size of possible extension queue 291. Compared 21366 event pairs, 450 based on Foata normal form. 1/4325 useless extension candidates. Maximal degree in co-relation 32726. Up to 1952 conditions per place. [2024-11-12 08:20:03,211 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 215 selfloop transitions, 139 changer transitions 16/371 dead transitions. [2024-11-12 08:20:03,211 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 175 places, 371 transitions, 5047 flow [2024-11-12 08:20:03,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2024-11-12 08:20:03,212 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2024-11-12 08:20:03,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 226 transitions. [2024-11-12 08:20:03,213 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.3837011884550085 [2024-11-12 08:20:03,213 INFO L175 Difference]: Start difference. First operand has 158 places, 273 transitions, 3408 flow. Second operand 19 states and 226 transitions. [2024-11-12 08:20:03,213 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 175 places, 371 transitions, 5047 flow [2024-11-12 08:20:03,551 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 168 places, 371 transitions, 4719 flow, removed 127 selfloop flow, removed 7 redundant places. [2024-11-12 08:20:03,557 INFO L231 Difference]: Finished difference. Result has 173 places, 282 transitions, 3575 flow [2024-11-12 08:20:03,557 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=3111, PETRI_DIFFERENCE_MINUEND_PLACES=150, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=273, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=130, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=137, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=3575, PETRI_PLACES=173, PETRI_TRANSITIONS=282} [2024-11-12 08:20:03,558 INFO L279 CegarLoopForPetriNet]: 31 programPoint places, 142 predicate places. [2024-11-12 08:20:03,558 INFO L471 AbstractCegarLoop]: Abstraction has has 173 places, 282 transitions, 3575 flow [2024-11-12 08:20:03,558 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 6.333333333333333) internal successors, (190), 30 states have internal predecessors, (190), 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) [2024-11-12 08:20:03,558 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-12 08:20:03,558 INFO L206 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-12 08:20:03,579 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2024-11-12 08:20:03,759 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2024-11-12 08:20:03,759 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-11-12 08:20:03,760 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 08:20:03,760 INFO L85 PathProgramCache]: Analyzing trace with hash 1586902929, now seen corresponding path program 6 times [2024-11-12 08:20:03,760 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 08:20:03,760 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1625524684] [2024-11-12 08:20:03,760 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 08:20:03,760 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 08:20:03,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 08:20:04,742 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2024-11-12 08:20:04,742 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-12 08:20:04,743 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1625524684] [2024-11-12 08:20:04,743 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1625524684] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-12 08:20:04,743 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [606830066] [2024-11-12 08:20:04,743 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-12 08:20:04,743 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-12 08:20:04,743 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-12 08:20:04,744 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-12 08:20:04,745 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-11-12 08:20:04,902 INFO L229 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2024-11-12 08:20:04,902 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-12 08:20:04,904 INFO L256 TraceCheckSpWp]: Trace formula consists of 378 conjuncts, 32 conjuncts are in the unsatisfiable core [2024-11-12 08:20:04,905 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-12 08:20:05,193 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-12 08:20:05,193 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 59 treesize of output 75 [2024-11-12 08:20:05,280 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2024-11-12 08:20:05,280 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-12 08:20:05,560 INFO L349 Elim1Store]: treesize reduction 32, result has 73.6 percent of original size [2024-11-12 08:20:05,560 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 46 treesize of output 102 [2024-11-12 08:20:05,692 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2024-11-12 08:20:05,692 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [606830066] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-12 08:20:05,693 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-12 08:20:05,693 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 9] total 29 [2024-11-12 08:20:05,693 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [461553165] [2024-11-12 08:20:05,693 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-12 08:20:05,693 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2024-11-12 08:20:05,694 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-12 08:20:05,694 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2024-11-12 08:20:05,695 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=712, Unknown=0, NotChecked=0, Total=812 [2024-11-12 08:20:05,695 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 31 [2024-11-12 08:20:05,695 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 173 places, 282 transitions, 3575 flow. Second operand has 29 states, 29 states have (on average 6.206896551724138) internal successors, (180), 29 states have internal predecessors, (180), 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) [2024-11-12 08:20:05,695 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-12 08:20:05,695 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 31 [2024-11-12 08:20:05,696 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-12 08:20:08,112 INFO L124 PetriNetUnfolderBase]: 3058/4480 cut-off events. [2024-11-12 08:20:08,112 INFO L125 PetriNetUnfolderBase]: For 110609/110609 co-relation queries the response was YES. [2024-11-12 08:20:08,131 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35616 conditions, 4480 events. 3058/4480 cut-off events. For 110609/110609 co-relation queries the response was YES. Maximal size of possible extension queue 288. Compared 22081 event pairs, 344 based on Foata normal form. 1/4476 useless extension candidates. Maximal degree in co-relation 35468. Up to 1535 conditions per place. [2024-11-12 08:20:08,153 INFO L140 encePairwiseOnDemand]: 19/31 looper letters, 236 selfloop transitions, 184 changer transitions 4/425 dead transitions. [2024-11-12 08:20:08,154 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 202 places, 425 transitions, 5793 flow [2024-11-12 08:20:08,154 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2024-11-12 08:20:08,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2024-11-12 08:20:08,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 358 transitions. [2024-11-12 08:20:08,156 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.372528616024974 [2024-11-12 08:20:08,156 INFO L175 Difference]: Start difference. First operand has 173 places, 282 transitions, 3575 flow. Second operand 31 states and 358 transitions. [2024-11-12 08:20:08,156 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 202 places, 425 transitions, 5793 flow [2024-11-12 08:20:08,410 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 189 places, 425 transitions, 5480 flow, removed 56 selfloop flow, removed 13 redundant places. [2024-11-12 08:20:08,414 INFO L231 Difference]: Finished difference. Result has 198 places, 303 transitions, 4076 flow [2024-11-12 08:20:08,415 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=3308, PETRI_DIFFERENCE_MINUEND_PLACES=159, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=282, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=165, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=108, PETRI_DIFFERENCE_SUBTRAHEND_STATES=31, PETRI_FLOW=4076, PETRI_PLACES=198, PETRI_TRANSITIONS=303} [2024-11-12 08:20:08,415 INFO L279 CegarLoopForPetriNet]: 31 programPoint places, 167 predicate places. [2024-11-12 08:20:08,415 INFO L471 AbstractCegarLoop]: Abstraction has has 198 places, 303 transitions, 4076 flow [2024-11-12 08:20:08,416 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 6.206896551724138) internal successors, (180), 29 states have internal predecessors, (180), 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) [2024-11-12 08:20:08,416 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-12 08:20:08,416 INFO L206 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-12 08:20:08,429 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2024-11-12 08:20:08,616 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-12 08:20:08,617 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-11-12 08:20:08,617 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 08:20:08,617 INFO L85 PathProgramCache]: Analyzing trace with hash 1757135269, now seen corresponding path program 7 times [2024-11-12 08:20:08,617 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 08:20:08,617 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1362215776] [2024-11-12 08:20:08,617 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 08:20:08,618 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 08:20:08,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 08:20:09,598 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2024-11-12 08:20:09,599 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-12 08:20:09,599 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1362215776] [2024-11-12 08:20:09,599 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1362215776] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-12 08:20:09,599 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1216112723] [2024-11-12 08:20:09,599 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-12 08:20:09,599 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-12 08:20:09,599 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-12 08:20:09,601 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-12 08:20:09,603 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-11-12 08:20:09,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 08:20:09,800 INFO L256 TraceCheckSpWp]: Trace formula consists of 432 conjuncts, 22 conjuncts are in the unsatisfiable core [2024-11-12 08:20:09,802 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-12 08:20:09,990 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-12 08:20:09,991 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 40 treesize of output 52 [2024-11-12 08:20:10,041 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2024-11-12 08:20:10,042 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-12 08:20:14,386 INFO L349 Elim1Store]: treesize reduction 32, result has 73.6 percent of original size [2024-11-12 08:20:14,387 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 46 treesize of output 102 [2024-11-12 08:20:14,473 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2024-11-12 08:20:14,474 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1216112723] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-12 08:20:14,474 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-12 08:20:14,474 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11, 9] total 30 [2024-11-12 08:20:14,474 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1608588665] [2024-11-12 08:20:14,475 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-12 08:20:14,475 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2024-11-12 08:20:14,476 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-12 08:20:14,476 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2024-11-12 08:20:14,477 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=754, Unknown=1, NotChecked=0, Total=870 [2024-11-12 08:20:14,477 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 31 [2024-11-12 08:20:14,477 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 198 places, 303 transitions, 4076 flow. Second operand has 30 states, 30 states have (on average 6.133333333333334) internal successors, (184), 30 states have internal predecessors, (184), 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) [2024-11-12 08:20:14,477 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-12 08:20:14,477 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 31 [2024-11-12 08:20:14,478 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-12 08:20:18,602 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-12 08:20:20,760 INFO L124 PetriNetUnfolderBase]: 3074/4507 cut-off events. [2024-11-12 08:20:20,760 INFO L125 PetriNetUnfolderBase]: For 116418/116418 co-relation queries the response was YES. [2024-11-12 08:20:20,786 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37235 conditions, 4507 events. 3074/4507 cut-off events. For 116418/116418 co-relation queries the response was YES. Maximal size of possible extension queue 289. Compared 22266 event pairs, 506 based on Foata normal form. 2/4504 useless extension candidates. Maximal degree in co-relation 37079. Up to 2162 conditions per place. [2024-11-12 08:20:20,806 INFO L140 encePairwiseOnDemand]: 18/31 looper letters, 235 selfloop transitions, 142 changer transitions 2/380 dead transitions. [2024-11-12 08:20:20,806 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 217 places, 380 transitions, 5460 flow [2024-11-12 08:20:20,807 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2024-11-12 08:20:20,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2024-11-12 08:20:20,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 232 transitions. [2024-11-12 08:20:20,808 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.3741935483870968 [2024-11-12 08:20:20,808 INFO L175 Difference]: Start difference. First operand has 198 places, 303 transitions, 4076 flow. Second operand 20 states and 232 transitions. [2024-11-12 08:20:20,808 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 217 places, 380 transitions, 5460 flow [2024-11-12 08:20:21,153 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 201 places, 380 transitions, 5140 flow, removed 59 selfloop flow, removed 16 redundant places. [2024-11-12 08:20:21,158 INFO L231 Difference]: Finished difference. Result has 203 places, 308 transitions, 4151 flow [2024-11-12 08:20:21,158 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=3761, PETRI_DIFFERENCE_MINUEND_PLACES=182, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=303, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=138, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=163, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=4151, PETRI_PLACES=203, PETRI_TRANSITIONS=308} [2024-11-12 08:20:21,158 INFO L279 CegarLoopForPetriNet]: 31 programPoint places, 172 predicate places. [2024-11-12 08:20:21,159 INFO L471 AbstractCegarLoop]: Abstraction has has 203 places, 308 transitions, 4151 flow [2024-11-12 08:20:21,159 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 6.133333333333334) internal successors, (184), 30 states have internal predecessors, (184), 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) [2024-11-12 08:20:21,159 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-12 08:20:21,159 INFO L206 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-12 08:20:21,173 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2024-11-12 08:20:21,359 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-12 08:20:21,360 INFO L396 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-11-12 08:20:21,360 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 08:20:21,360 INFO L85 PathProgramCache]: Analyzing trace with hash 1999907323, now seen corresponding path program 8 times [2024-11-12 08:20:21,360 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 08:20:21,361 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1441596325] [2024-11-12 08:20:21,361 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 08:20:21,361 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 08:20:21,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 08:20:22,626 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2024-11-12 08:20:22,627 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-12 08:20:22,627 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1441596325] [2024-11-12 08:20:22,627 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1441596325] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-12 08:20:22,627 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [846971442] [2024-11-12 08:20:22,627 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-12 08:20:22,627 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-12 08:20:22,627 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-12 08:20:22,629 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-12 08:20:22,630 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-11-12 08:20:22,832 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-12 08:20:22,832 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-12 08:20:22,835 INFO L256 TraceCheckSpWp]: Trace formula consists of 432 conjuncts, 34 conjuncts are in the unsatisfiable core [2024-11-12 08:20:22,837 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-12 08:20:23,109 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-12 08:20:23,110 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 59 treesize of output 75 [2024-11-12 08:20:23,196 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2024-11-12 08:20:23,196 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-12 08:20:23,565 INFO L349 Elim1Store]: treesize reduction 8, result has 96.1 percent of original size [2024-11-12 08:20:23,566 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 54 treesize of output 210 [2024-11-12 08:20:28,774 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2024-11-12 08:20:28,775 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [846971442] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-12 08:20:28,775 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-12 08:20:28,775 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 9] total 27 [2024-11-12 08:20:28,775 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [13893423] [2024-11-12 08:20:28,775 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-12 08:20:28,775 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2024-11-12 08:20:28,775 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-12 08:20:28,776 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2024-11-12 08:20:28,776 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=607, Unknown=0, NotChecked=0, Total=702 [2024-11-12 08:20:28,776 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 31 [2024-11-12 08:20:28,777 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 203 places, 308 transitions, 4151 flow. Second operand has 27 states, 27 states have (on average 6.2592592592592595) internal successors, (169), 27 states have internal predecessors, (169), 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) [2024-11-12 08:20:28,777 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-12 08:20:28,777 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 31 [2024-11-12 08:20:28,777 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-12 08:20:30,899 INFO L124 PetriNetUnfolderBase]: 3599/5329 cut-off events. [2024-11-12 08:20:30,899 INFO L125 PetriNetUnfolderBase]: For 141315/141315 co-relation queries the response was YES. [2024-11-12 08:20:30,928 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44378 conditions, 5329 events. 3599/5329 cut-off events. For 141315/141315 co-relation queries the response was YES. Maximal size of possible extension queue 336. Compared 27808 event pairs, 618 based on Foata normal form. 2/5326 useless extension candidates. Maximal degree in co-relation 44221. Up to 3867 conditions per place. [2024-11-12 08:20:30,949 INFO L140 encePairwiseOnDemand]: 19/31 looper letters, 298 selfloop transitions, 144 changer transitions 2/445 dead transitions. [2024-11-12 08:20:30,949 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 222 places, 445 transitions, 6674 flow [2024-11-12 08:20:30,949 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2024-11-12 08:20:30,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2024-11-12 08:20:30,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 231 transitions. [2024-11-12 08:20:30,950 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.3725806451612903 [2024-11-12 08:20:30,950 INFO L175 Difference]: Start difference. First operand has 203 places, 308 transitions, 4151 flow. Second operand 20 states and 231 transitions. [2024-11-12 08:20:30,950 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 222 places, 445 transitions, 6674 flow [2024-11-12 08:20:31,305 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 206 places, 445 transitions, 6362 flow, removed 26 selfloop flow, removed 16 redundant places. [2024-11-12 08:20:31,310 INFO L231 Difference]: Finished difference. Result has 212 places, 358 transitions, 5005 flow [2024-11-12 08:20:31,310 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=3891, PETRI_DIFFERENCE_MINUEND_PLACES=187, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=308, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=100, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=199, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=5005, PETRI_PLACES=212, PETRI_TRANSITIONS=358} [2024-11-12 08:20:31,311 INFO L279 CegarLoopForPetriNet]: 31 programPoint places, 181 predicate places. [2024-11-12 08:20:31,311 INFO L471 AbstractCegarLoop]: Abstraction has has 212 places, 358 transitions, 5005 flow [2024-11-12 08:20:31,311 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 6.2592592592592595) internal successors, (169), 27 states have internal predecessors, (169), 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) [2024-11-12 08:20:31,311 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-12 08:20:31,311 INFO L206 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-12 08:20:31,325 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2024-11-12 08:20:31,512 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2024-11-12 08:20:31,512 INFO L396 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-11-12 08:20:31,513 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 08:20:31,513 INFO L85 PathProgramCache]: Analyzing trace with hash 1307130631, now seen corresponding path program 9 times [2024-11-12 08:20:31,513 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 08:20:31,513 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [67312562] [2024-11-12 08:20:31,513 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 08:20:31,513 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 08:20:31,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 08:20:32,385 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2024-11-12 08:20:32,386 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-12 08:20:32,386 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [67312562] [2024-11-12 08:20:32,386 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [67312562] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-12 08:20:32,386 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1765628726] [2024-11-12 08:20:32,386 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-12 08:20:32,386 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-12 08:20:32,386 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-12 08:20:32,388 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-12 08:20:32,391 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2024-11-12 08:20:32,571 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-11-12 08:20:32,571 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-12 08:20:32,573 INFO L256 TraceCheckSpWp]: Trace formula consists of 351 conjuncts, 34 conjuncts are in the unsatisfiable core [2024-11-12 08:20:32,574 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-12 08:20:32,879 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-12 08:20:32,879 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 59 treesize of output 75 [2024-11-12 08:20:32,979 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2024-11-12 08:20:32,979 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-12 08:20:33,363 INFO L349 Elim1Store]: treesize reduction 8, result has 96.1 percent of original size [2024-11-12 08:20:33,364 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 54 treesize of output 210 [2024-11-12 08:20:39,366 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2024-11-12 08:20:39,367 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1765628726] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-12 08:20:39,367 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-12 08:20:39,367 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 9] total 28 [2024-11-12 08:20:39,367 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [685036373] [2024-11-12 08:20:39,367 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-12 08:20:39,367 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2024-11-12 08:20:39,367 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-12 08:20:39,368 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2024-11-12 08:20:39,368 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=663, Unknown=0, NotChecked=0, Total=756 [2024-11-12 08:20:39,368 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 31 [2024-11-12 08:20:39,369 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 212 places, 358 transitions, 5005 flow. Second operand has 28 states, 28 states have (on average 6.25) internal successors, (175), 28 states have internal predecessors, (175), 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) [2024-11-12 08:20:39,369 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-12 08:20:39,369 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 31 [2024-11-12 08:20:39,369 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand