./Ultimate.py --spec /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/properties/unreach-call.prp --file /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/unroll-cond-2.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 4a390ef5 Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/unroll-cond-2.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 4f5c6e2b4939ff0e3b5a44ab7f8c3e5d18f7e9fd12beb8fad487ea501e8fa48b --- Real Ultimate output --- This is Ultimate 0.2.5-dev-4a390ef-m [2024-10-24 12:38:39,940 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-10-24 12:38:40,037 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-10-24 12:38:40,045 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-10-24 12:38:40,046 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-10-24 12:38:40,079 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-10-24 12:38:40,079 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-10-24 12:38:40,079 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-10-24 12:38:40,080 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-10-24 12:38:40,081 INFO L153 SettingsManager]: * Use memory slicer=true [2024-10-24 12:38:40,081 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-10-24 12:38:40,081 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-10-24 12:38:40,082 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-10-24 12:38:40,082 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-10-24 12:38:40,082 INFO L153 SettingsManager]: * Use SBE=true [2024-10-24 12:38:40,083 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-10-24 12:38:40,083 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-10-24 12:38:40,084 INFO L153 SettingsManager]: * sizeof long=4 [2024-10-24 12:38:40,084 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-10-24 12:38:40,085 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-10-24 12:38:40,085 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-10-24 12:38:40,086 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-10-24 12:38:40,086 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-10-24 12:38:40,086 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-10-24 12:38:40,087 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-10-24 12:38:40,090 INFO L153 SettingsManager]: * sizeof long double=12 [2024-10-24 12:38:40,091 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-10-24 12:38:40,091 INFO L153 SettingsManager]: * Use constant arrays=true [2024-10-24 12:38:40,091 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-10-24 12:38:40,092 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-10-24 12:38:40,092 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-10-24 12:38:40,092 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-10-24 12:38:40,092 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-24 12:38:40,092 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-10-24 12:38:40,093 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-10-24 12:38:40,093 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-10-24 12:38:40,093 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-10-24 12:38:40,093 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-10-24 12:38:40,093 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-10-24 12:38:40,094 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-10-24 12:38:40,094 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-10-24 12:38:40,094 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-10-24 12:38:40,095 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 4f5c6e2b4939ff0e3b5a44ab7f8c3e5d18f7e9fd12beb8fad487ea501e8fa48b [2024-10-24 12:38:40,348 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-10-24 12:38:40,377 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-10-24 12:38:40,381 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-10-24 12:38:40,383 INFO L270 PluginConnector]: Initializing CDTParser... [2024-10-24 12:38:40,383 INFO L274 PluginConnector]: CDTParser initialized [2024-10-24 12:38:40,385 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/unroll-cond-2.wvr.c [2024-10-24 12:38:41,916 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-10-24 12:38:42,099 INFO L384 CDTParser]: Found 1 translation units. [2024-10-24 12:38:42,099 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/unroll-cond-2.wvr.c [2024-10-24 12:38:42,107 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a2cb8381c/57f2b0640dd641ce9573bc68753bef23/FLAGe7e0989aa [2024-10-24 12:38:42,497 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a2cb8381c/57f2b0640dd641ce9573bc68753bef23 [2024-10-24 12:38:42,500 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-10-24 12:38:42,501 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-10-24 12:38:42,502 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-10-24 12:38:42,503 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-10-24 12:38:42,509 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-10-24 12:38:42,509 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.10 12:38:42" (1/1) ... [2024-10-24 12:38:42,510 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3192edb6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 12:38:42, skipping insertion in model container [2024-10-24 12:38:42,510 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.10 12:38:42" (1/1) ... [2024-10-24 12:38:42,535 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-10-24 12:38:42,750 WARN L248 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/unroll-cond-2.wvr.c[2500,2513] [2024-10-24 12:38:42,767 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-24 12:38:42,774 INFO L200 MainTranslator]: Completed pre-run [2024-10-24 12:38:42,799 WARN L248 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/unroll-cond-2.wvr.c[2500,2513] [2024-10-24 12:38:42,817 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-24 12:38:42,841 INFO L204 MainTranslator]: Completed translation [2024-10-24 12:38:42,842 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 12:38:42 WrapperNode [2024-10-24 12:38:42,842 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-10-24 12:38:42,843 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-10-24 12:38:42,844 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-10-24 12:38:42,844 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-10-24 12:38:42,851 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 12:38:42" (1/1) ... [2024-10-24 12:38:42,861 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 12:38:42" (1/1) ... [2024-10-24 12:38:42,889 INFO L138 Inliner]: procedures = 23, calls = 23, calls flagged for inlining = 11, calls inlined = 11, statements flattened = 134 [2024-10-24 12:38:42,889 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-10-24 12:38:42,890 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-10-24 12:38:42,890 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-10-24 12:38:42,890 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-10-24 12:38:42,899 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 12:38:42" (1/1) ... [2024-10-24 12:38:42,899 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 12:38:42" (1/1) ... [2024-10-24 12:38:42,901 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 12:38:42" (1/1) ... [2024-10-24 12:38:42,915 INFO L175 MemorySlicer]: Split 7 memory accesses to 2 slices as follows [2, 5]. 71 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0]. The 1 writes are split as follows [0, 1]. [2024-10-24 12:38:42,916 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 12:38:42" (1/1) ... [2024-10-24 12:38:42,916 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 12:38:42" (1/1) ... [2024-10-24 12:38:42,921 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 12:38:42" (1/1) ... [2024-10-24 12:38:42,925 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 12:38:42" (1/1) ... [2024-10-24 12:38:42,926 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 12:38:42" (1/1) ... [2024-10-24 12:38:42,927 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 12:38:42" (1/1) ... [2024-10-24 12:38:42,929 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-10-24 12:38:42,930 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-10-24 12:38:42,930 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-10-24 12:38:42,931 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-10-24 12:38:42,931 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 12:38:42" (1/1) ... [2024-10-24 12:38:42,937 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-24 12:38:42,947 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-24 12:38:42,965 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-10-24 12:38:42,968 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-10-24 12:38:43,016 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-10-24 12:38:43,016 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2024-10-24 12:38:43,017 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2024-10-24 12:38:43,018 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2024-10-24 12:38:43,018 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2024-10-24 12:38:43,018 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-10-24 12:38:43,018 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-10-24 12:38:43,018 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-10-24 12:38:43,018 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-10-24 12:38:43,019 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-10-24 12:38:43,019 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-10-24 12:38:43,019 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-10-24 12:38:43,019 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-10-24 12:38:43,019 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-10-24 12:38:43,020 WARN L207 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2024-10-24 12:38:43,147 INFO L238 CfgBuilder]: Building ICFG [2024-10-24 12:38:43,149 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-10-24 12:38:43,451 INFO L283 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2024-10-24 12:38:43,451 INFO L287 CfgBuilder]: Performing block encoding [2024-10-24 12:38:43,685 INFO L309 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-10-24 12:38:43,685 INFO L314 CfgBuilder]: Removed 3 assume(true) statements. [2024-10-24 12:38:43,686 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.10 12:38:43 BoogieIcfgContainer [2024-10-24 12:38:43,686 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-10-24 12:38:43,690 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-10-24 12:38:43,690 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-10-24 12:38:43,694 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-10-24 12:38:43,694 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.10 12:38:42" (1/3) ... [2024-10-24 12:38:43,695 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4a60f1f0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.10 12:38:43, skipping insertion in model container [2024-10-24 12:38:43,695 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 12:38:42" (2/3) ... [2024-10-24 12:38:43,695 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4a60f1f0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.10 12:38:43, skipping insertion in model container [2024-10-24 12:38:43,695 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.10 12:38:43" (3/3) ... [2024-10-24 12:38:43,696 INFO L112 eAbstractionObserver]: Analyzing ICFG unroll-cond-2.wvr.c [2024-10-24 12:38:43,711 INFO L209 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-10-24 12:38:43,712 INFO L149 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-10-24 12:38:43,712 INFO L484 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-10-24 12:38:43,782 INFO L143 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2024-10-24 12:38:43,810 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 24 places, 20 transitions, 54 flow [2024-10-24 12:38:43,839 INFO L124 PetriNetUnfolderBase]: 3/18 cut-off events. [2024-10-24 12:38:43,839 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-10-24 12:38:43,841 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27 conditions, 18 events. 3/18 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 2. Compared 10 event pairs, 0 based on Foata normal form. 0/14 useless extension candidates. Maximal degree in co-relation 11. Up to 2 conditions per place. [2024-10-24 12:38:43,841 INFO L82 GeneralOperation]: Start removeDead. Operand has 24 places, 20 transitions, 54 flow [2024-10-24 12:38:43,844 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 21 places, 17 transitions, 46 flow [2024-10-24 12:38:43,853 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-10-24 12:38:43,860 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;@1d92651, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-10-24 12:38:43,860 INFO L334 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2024-10-24 12:38:43,869 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-10-24 12:38:43,869 INFO L124 PetriNetUnfolderBase]: 3/16 cut-off events. [2024-10-24 12:38:43,869 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-10-24 12:38:43,869 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-24 12:38:43,870 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-24 12:38:43,871 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-24 12:38:43,878 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 12:38:43,878 INFO L85 PathProgramCache]: Analyzing trace with hash 1382470306, now seen corresponding path program 1 times [2024-10-24 12:38:43,888 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 12:38:43,889 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1534350789] [2024-10-24 12:38:43,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 12:38:43,889 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 12:38:44,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 12:38:44,308 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 12:38:44,308 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 12:38:44,308 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1534350789] [2024-10-24 12:38:44,313 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1534350789] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-24 12:38:44,314 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-24 12:38:44,314 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-10-24 12:38:44,316 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1329145540] [2024-10-24 12:38:44,320 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-24 12:38:44,328 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-24 12:38:44,333 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-24 12:38:44,357 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-24 12:38:44,359 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-24 12:38:44,360 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 20 [2024-10-24 12:38:44,363 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 21 places, 17 transitions, 46 flow. Second operand has 3 states, 3 states have (on average 7.333333333333333) internal successors, (22), 3 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 12:38:44,363 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-24 12:38:44,364 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 20 [2024-10-24 12:38:44,364 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-24 12:38:44,446 INFO L124 PetriNetUnfolderBase]: 38/71 cut-off events. [2024-10-24 12:38:44,447 INFO L125 PetriNetUnfolderBase]: For 9/9 co-relation queries the response was YES. [2024-10-24 12:38:44,448 INFO L83 FinitePrefix]: Finished finitePrefix Result has 157 conditions, 71 events. 38/71 cut-off events. For 9/9 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 118 event pairs, 22 based on Foata normal form. 0/55 useless extension candidates. Maximal degree in co-relation 120. Up to 70 conditions per place. [2024-10-24 12:38:44,452 INFO L140 encePairwiseOnDemand]: 17/20 looper letters, 15 selfloop transitions, 2 changer transitions 0/18 dead transitions. [2024-10-24 12:38:44,452 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 23 places, 18 transitions, 82 flow [2024-10-24 12:38:44,453 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-24 12:38:44,455 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-10-24 12:38:44,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 27 transitions. [2024-10-24 12:38:44,464 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.45 [2024-10-24 12:38:44,466 INFO L175 Difference]: Start difference. First operand has 21 places, 17 transitions, 46 flow. Second operand 3 states and 27 transitions. [2024-10-24 12:38:44,466 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 23 places, 18 transitions, 82 flow [2024-10-24 12:38:44,469 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 19 places, 18 transitions, 74 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-10-24 12:38:44,471 INFO L231 Difference]: Finished difference. Result has 20 places, 18 transitions, 50 flow [2024-10-24 12:38:44,473 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=38, PETRI_DIFFERENCE_MINUEND_PLACES=17, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=17, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=15, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=50, PETRI_PLACES=20, PETRI_TRANSITIONS=18} [2024-10-24 12:38:44,478 INFO L277 CegarLoopForPetriNet]: 21 programPoint places, -1 predicate places. [2024-10-24 12:38:44,479 INFO L471 AbstractCegarLoop]: Abstraction has has 20 places, 18 transitions, 50 flow [2024-10-24 12:38:44,479 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 7.333333333333333) internal successors, (22), 3 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 12:38:44,479 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-24 12:38:44,480 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-24 12:38:44,480 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-10-24 12:38:44,480 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-24 12:38:44,481 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 12:38:44,482 INFO L85 PathProgramCache]: Analyzing trace with hash 1898578683, now seen corresponding path program 1 times [2024-10-24 12:38:44,482 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 12:38:44,483 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1312982197] [2024-10-24 12:38:44,483 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 12:38:44,484 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 12:38:44,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 12:38:44,871 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-24 12:38:44,872 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 12:38:44,872 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1312982197] [2024-10-24 12:38:44,872 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1312982197] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-24 12:38:44,872 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-24 12:38:44,872 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-10-24 12:38:44,873 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [741486157] [2024-10-24 12:38:44,873 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-24 12:38:44,874 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-10-24 12:38:44,874 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-24 12:38:44,876 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-10-24 12:38:44,876 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-10-24 12:38:44,876 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 20 [2024-10-24 12:38:44,877 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 20 places, 18 transitions, 50 flow. Second operand has 6 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 12:38:44,877 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-24 12:38:44,877 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 20 [2024-10-24 12:38:44,878 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-24 12:38:45,079 INFO L124 PetriNetUnfolderBase]: 67/123 cut-off events. [2024-10-24 12:38:45,081 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-10-24 12:38:45,083 INFO L83 FinitePrefix]: Finished finitePrefix Result has 260 conditions, 123 events. 67/123 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 328 event pairs, 2 based on Foata normal form. 1/95 useless extension candidates. Maximal degree in co-relation 249. Up to 77 conditions per place. [2024-10-24 12:38:45,084 INFO L140 encePairwiseOnDemand]: 12/20 looper letters, 30 selfloop transitions, 11 changer transitions 2/44 dead transitions. [2024-10-24 12:38:45,085 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 25 places, 44 transitions, 194 flow [2024-10-24 12:38:45,086 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-10-24 12:38:45,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-10-24 12:38:45,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 62 transitions. [2024-10-24 12:38:45,087 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5166666666666667 [2024-10-24 12:38:45,087 INFO L175 Difference]: Start difference. First operand has 20 places, 18 transitions, 50 flow. Second operand 6 states and 62 transitions. [2024-10-24 12:38:45,087 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 25 places, 44 transitions, 194 flow [2024-10-24 12:38:45,088 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 24 places, 44 transitions, 190 flow, removed 1 selfloop flow, removed 1 redundant places. [2024-10-24 12:38:45,089 INFO L231 Difference]: Finished difference. Result has 27 places, 28 transitions, 114 flow [2024-10-24 12:38:45,089 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=46, PETRI_DIFFERENCE_MINUEND_PLACES=19, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=18, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=11, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=114, PETRI_PLACES=27, PETRI_TRANSITIONS=28} [2024-10-24 12:38:45,091 INFO L277 CegarLoopForPetriNet]: 21 programPoint places, 6 predicate places. [2024-10-24 12:38:45,091 INFO L471 AbstractCegarLoop]: Abstraction has has 27 places, 28 transitions, 114 flow [2024-10-24 12:38:45,092 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 12:38:45,092 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-24 12:38:45,092 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-24 12:38:45,093 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-10-24 12:38:45,093 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-24 12:38:45,094 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 12:38:45,095 INFO L85 PathProgramCache]: Analyzing trace with hash 1602650249, now seen corresponding path program 2 times [2024-10-24 12:38:45,095 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 12:38:45,096 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1968800555] [2024-10-24 12:38:45,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 12:38:45,097 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 12:38:45,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 12:38:45,323 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-24 12:38:45,323 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 12:38:45,323 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1968800555] [2024-10-24 12:38:45,324 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1968800555] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-24 12:38:45,324 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-24 12:38:45,325 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-10-24 12:38:45,325 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [904853338] [2024-10-24 12:38:45,325 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-24 12:38:45,326 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-10-24 12:38:45,326 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-24 12:38:45,327 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-10-24 12:38:45,328 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-10-24 12:38:45,328 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 20 [2024-10-24 12:38:45,328 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 27 places, 28 transitions, 114 flow. Second operand has 6 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 12:38:45,328 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-24 12:38:45,329 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 20 [2024-10-24 12:38:45,329 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-24 12:38:45,476 INFO L124 PetriNetUnfolderBase]: 67/125 cut-off events. [2024-10-24 12:38:45,477 INFO L125 PetriNetUnfolderBase]: For 34/34 co-relation queries the response was YES. [2024-10-24 12:38:45,478 INFO L83 FinitePrefix]: Finished finitePrefix Result has 381 conditions, 125 events. 67/125 cut-off events. For 34/34 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 328 event pairs, 0 based on Foata normal form. 1/104 useless extension candidates. Maximal degree in co-relation 362. Up to 77 conditions per place. [2024-10-24 12:38:45,479 INFO L140 encePairwiseOnDemand]: 12/20 looper letters, 29 selfloop transitions, 15 changer transitions 2/47 dead transitions. [2024-10-24 12:38:45,480 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 33 places, 47 transitions, 268 flow [2024-10-24 12:38:45,480 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-10-24 12:38:45,480 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-10-24 12:38:45,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 64 transitions. [2024-10-24 12:38:45,484 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.45714285714285713 [2024-10-24 12:38:45,484 INFO L175 Difference]: Start difference. First operand has 27 places, 28 transitions, 114 flow. Second operand 7 states and 64 transitions. [2024-10-24 12:38:45,484 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 33 places, 47 transitions, 268 flow [2024-10-24 12:38:45,486 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 33 places, 47 transitions, 260 flow, removed 4 selfloop flow, removed 0 redundant places. [2024-10-24 12:38:45,487 INFO L231 Difference]: Finished difference. Result has 35 places, 33 transitions, 173 flow [2024-10-24 12:38:45,489 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=108, PETRI_DIFFERENCE_MINUEND_PLACES=27, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=28, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=16, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=173, PETRI_PLACES=35, PETRI_TRANSITIONS=33} [2024-10-24 12:38:45,489 INFO L277 CegarLoopForPetriNet]: 21 programPoint places, 14 predicate places. [2024-10-24 12:38:45,490 INFO L471 AbstractCegarLoop]: Abstraction has has 35 places, 33 transitions, 173 flow [2024-10-24 12:38:45,490 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 12:38:45,490 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-24 12:38:45,490 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-24 12:38:45,490 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-10-24 12:38:45,491 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-24 12:38:45,492 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 12:38:45,492 INFO L85 PathProgramCache]: Analyzing trace with hash 1602055603, now seen corresponding path program 3 times [2024-10-24 12:38:45,492 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 12:38:45,493 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [536758027] [2024-10-24 12:38:45,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 12:38:45,493 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 12:38:45,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 12:38:45,697 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-24 12:38:45,697 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 12:38:45,698 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [536758027] [2024-10-24 12:38:45,698 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [536758027] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-24 12:38:45,698 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-24 12:38:45,698 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-10-24 12:38:45,699 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [118291166] [2024-10-24 12:38:45,699 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-24 12:38:45,699 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-10-24 12:38:45,700 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-24 12:38:45,700 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-10-24 12:38:45,700 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-10-24 12:38:45,701 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 20 [2024-10-24 12:38:45,701 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 35 places, 33 transitions, 173 flow. Second operand has 6 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 12:38:45,701 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-24 12:38:45,701 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 20 [2024-10-24 12:38:45,701 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-24 12:38:45,860 INFO L124 PetriNetUnfolderBase]: 83/158 cut-off events. [2024-10-24 12:38:45,861 INFO L125 PetriNetUnfolderBase]: For 107/107 co-relation queries the response was YES. [2024-10-24 12:38:45,862 INFO L83 FinitePrefix]: Finished finitePrefix Result has 543 conditions, 158 events. 83/158 cut-off events. For 107/107 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 452 event pairs, 6 based on Foata normal form. 1/130 useless extension candidates. Maximal degree in co-relation 520. Up to 58 conditions per place. [2024-10-24 12:38:45,863 INFO L140 encePairwiseOnDemand]: 12/20 looper letters, 35 selfloop transitions, 19 changer transitions 2/57 dead transitions. [2024-10-24 12:38:45,863 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 42 places, 57 transitions, 368 flow [2024-10-24 12:38:45,864 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-10-24 12:38:45,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-10-24 12:38:45,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 76 transitions. [2024-10-24 12:38:45,865 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.475 [2024-10-24 12:38:45,865 INFO L175 Difference]: Start difference. First operand has 35 places, 33 transitions, 173 flow. Second operand 8 states and 76 transitions. [2024-10-24 12:38:45,865 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 42 places, 57 transitions, 368 flow [2024-10-24 12:38:45,868 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 40 places, 57 transitions, 341 flow, removed 9 selfloop flow, removed 2 redundant places. [2024-10-24 12:38:45,869 INFO L231 Difference]: Finished difference. Result has 43 places, 37 transitions, 232 flow [2024-10-24 12:38:45,869 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=148, PETRI_DIFFERENCE_MINUEND_PLACES=33, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=15, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=232, PETRI_PLACES=43, PETRI_TRANSITIONS=37} [2024-10-24 12:38:45,870 INFO L277 CegarLoopForPetriNet]: 21 programPoint places, 22 predicate places. [2024-10-24 12:38:45,870 INFO L471 AbstractCegarLoop]: Abstraction has has 43 places, 37 transitions, 232 flow [2024-10-24 12:38:45,870 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 12:38:45,870 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-24 12:38:45,871 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-24 12:38:45,871 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-10-24 12:38:45,871 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-24 12:38:45,871 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 12:38:45,872 INFO L85 PathProgramCache]: Analyzing trace with hash -1373918319, now seen corresponding path program 1 times [2024-10-24 12:38:45,872 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 12:38:45,872 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [145046925] [2024-10-24 12:38:45,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 12:38:45,872 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 12:38:45,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 12:38:46,033 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-24 12:38:46,033 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 12:38:46,034 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [145046925] [2024-10-24 12:38:46,034 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [145046925] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-24 12:38:46,034 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [450749196] [2024-10-24 12:38:46,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 12:38:46,034 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-24 12:38:46,035 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-24 12:38:46,036 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-24 12:38:46,038 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-10-24 12:38:46,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 12:38:46,119 INFO L255 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 32 conjuncts are in the unsatisfiable core [2024-10-24 12:38:46,124 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-24 12:38:46,215 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-10-24 12:38:46,553 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2024-10-24 12:38:46,554 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 17 [2024-10-24 12:38:46,572 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 12:38:46,573 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-24 12:38:47,248 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 72 treesize of output 64 [2024-10-24 12:38:47,273 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-24 12:38:47,274 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 131 treesize of output 129 [2024-10-24 12:38:47,773 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 12:38:47,773 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [450749196] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-24 12:38:47,774 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-24 12:38:47,774 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 9, 9] total 22 [2024-10-24 12:38:47,774 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [970972268] [2024-10-24 12:38:47,774 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-24 12:38:47,775 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2024-10-24 12:38:47,776 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-24 12:38:47,777 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2024-10-24 12:38:47,778 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=351, Unknown=0, NotChecked=0, Total=462 [2024-10-24 12:38:47,778 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 20 [2024-10-24 12:38:47,778 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 37 transitions, 232 flow. Second operand has 22 states, 22 states have (on average 5.045454545454546) internal successors, (111), 22 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 12:38:47,778 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-24 12:38:47,778 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 20 [2024-10-24 12:38:47,778 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-24 12:38:48,986 INFO L124 PetriNetUnfolderBase]: 273/493 cut-off events. [2024-10-24 12:38:48,987 INFO L125 PetriNetUnfolderBase]: For 716/716 co-relation queries the response was YES. [2024-10-24 12:38:48,990 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1862 conditions, 493 events. 273/493 cut-off events. For 716/716 co-relation queries the response was YES. Maximal size of possible extension queue 37. Compared 1979 event pairs, 26 based on Foata normal form. 13/504 useless extension candidates. Maximal degree in co-relation 1213. Up to 171 conditions per place. [2024-10-24 12:38:48,992 INFO L140 encePairwiseOnDemand]: 10/20 looper letters, 71 selfloop transitions, 41 changer transitions 54/167 dead transitions. [2024-10-24 12:38:48,992 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 167 transitions, 1184 flow [2024-10-24 12:38:48,993 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2024-10-24 12:38:48,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2024-10-24 12:38:48,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 239 transitions. [2024-10-24 12:38:48,995 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4425925925925926 [2024-10-24 12:38:48,995 INFO L175 Difference]: Start difference. First operand has 43 places, 37 transitions, 232 flow. Second operand 27 states and 239 transitions. [2024-10-24 12:38:48,995 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 167 transitions, 1184 flow [2024-10-24 12:38:49,001 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 167 transitions, 1129 flow, removed 5 selfloop flow, removed 5 redundant places. [2024-10-24 12:38:49,005 INFO L231 Difference]: Finished difference. Result has 77 places, 59 transitions, 496 flow [2024-10-24 12:38:49,006 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=201, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=11, PETRI_DIFFERENCE_SUBTRAHEND_STATES=27, PETRI_FLOW=496, PETRI_PLACES=77, PETRI_TRANSITIONS=59} [2024-10-24 12:38:49,007 INFO L277 CegarLoopForPetriNet]: 21 programPoint places, 56 predicate places. [2024-10-24 12:38:49,008 INFO L471 AbstractCegarLoop]: Abstraction has has 77 places, 59 transitions, 496 flow [2024-10-24 12:38:49,008 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 5.045454545454546) internal successors, (111), 22 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 12:38:49,008 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-24 12:38:49,009 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-24 12:38:49,027 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2024-10-24 12:38:49,212 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-24 12:38:49,213 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-24 12:38:49,213 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 12:38:49,213 INFO L85 PathProgramCache]: Analyzing trace with hash -1621282384, now seen corresponding path program 1 times [2024-10-24 12:38:49,214 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 12:38:49,214 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1459224483] [2024-10-24 12:38:49,214 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 12:38:49,214 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 12:38:49,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 12:38:49,553 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-24 12:38:49,554 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 12:38:49,554 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1459224483] [2024-10-24 12:38:49,554 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1459224483] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-24 12:38:49,554 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1191065540] [2024-10-24 12:38:49,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 12:38:49,555 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-24 12:38:49,555 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-24 12:38:49,557 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) [2024-10-24 12:38:49,559 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-10-24 12:38:49,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 12:38:49,628 INFO L255 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 13 conjuncts are in the unsatisfiable core [2024-10-24 12:38:49,631 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-24 12:38:49,748 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2024-10-24 12:38:49,752 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-24 12:38:49,753 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-24 12:38:49,933 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2024-10-24 12:38:49,933 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 22 [2024-10-24 12:38:49,996 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-24 12:38:49,997 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1191065540] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-24 12:38:49,997 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-24 12:38:49,998 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 15 [2024-10-24 12:38:49,998 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1999637081] [2024-10-24 12:38:49,998 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-24 12:38:49,998 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-10-24 12:38:49,999 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-24 12:38:50,000 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-10-24 12:38:50,000 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=176, Unknown=0, NotChecked=0, Total=240 [2024-10-24 12:38:50,000 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 20 [2024-10-24 12:38:50,000 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 77 places, 59 transitions, 496 flow. Second operand has 16 states, 16 states have (on average 5.5625) internal successors, (89), 16 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 12:38:50,001 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-24 12:38:50,001 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 20 [2024-10-24 12:38:50,001 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-24 12:38:50,261 INFO L124 PetriNetUnfolderBase]: 217/389 cut-off events. [2024-10-24 12:38:50,262 INFO L125 PetriNetUnfolderBase]: For 1487/1487 co-relation queries the response was YES. [2024-10-24 12:38:50,263 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1906 conditions, 389 events. 217/389 cut-off events. For 1487/1487 co-relation queries the response was YES. Maximal size of possible extension queue 33. Compared 1439 event pairs, 9 based on Foata normal form. 1/388 useless extension candidates. Maximal degree in co-relation 1848. Up to 236 conditions per place. [2024-10-24 12:38:50,266 INFO L140 encePairwiseOnDemand]: 11/20 looper letters, 59 selfloop transitions, 35 changer transitions 3/98 dead transitions. [2024-10-24 12:38:50,266 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 98 transitions, 916 flow [2024-10-24 12:38:50,267 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-10-24 12:38:50,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-10-24 12:38:50,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 94 transitions. [2024-10-24 12:38:50,268 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.47 [2024-10-24 12:38:50,268 INFO L175 Difference]: Start difference. First operand has 77 places, 59 transitions, 496 flow. Second operand 10 states and 94 transitions. [2024-10-24 12:38:50,268 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 98 transitions, 916 flow [2024-10-24 12:38:50,275 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 98 transitions, 795 flow, removed 47 selfloop flow, removed 12 redundant places. [2024-10-24 12:38:50,277 INFO L231 Difference]: Finished difference. Result has 68 places, 71 transitions, 590 flow [2024-10-24 12:38:50,277 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=399, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=590, PETRI_PLACES=68, PETRI_TRANSITIONS=71} [2024-10-24 12:38:50,278 INFO L277 CegarLoopForPetriNet]: 21 programPoint places, 47 predicate places. [2024-10-24 12:38:50,278 INFO L471 AbstractCegarLoop]: Abstraction has has 68 places, 71 transitions, 590 flow [2024-10-24 12:38:50,279 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 5.5625) internal successors, (89), 16 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 12:38:50,279 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-24 12:38:50,279 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-24 12:38:50,296 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-10-24 12:38:50,483 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2024-10-24 12:38:50,484 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-24 12:38:50,484 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 12:38:50,484 INFO L85 PathProgramCache]: Analyzing trace with hash 948205454, now seen corresponding path program 2 times [2024-10-24 12:38:50,484 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 12:38:50,485 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [591030735] [2024-10-24 12:38:50,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 12:38:50,485 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 12:38:50,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 12:38:50,797 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-24 12:38:50,798 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 12:38:50,798 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [591030735] [2024-10-24 12:38:50,798 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [591030735] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-24 12:38:50,798 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [686283644] [2024-10-24 12:38:50,798 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-24 12:38:50,798 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-24 12:38:50,798 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-24 12:38:50,801 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) [2024-10-24 12:38:50,803 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-10-24 12:38:50,871 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-24 12:38:50,871 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-24 12:38:50,873 INFO L255 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 19 conjuncts are in the unsatisfiable core [2024-10-24 12:38:50,874 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-24 12:38:50,963 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2024-10-24 12:38:50,967 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-24 12:38:50,967 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-24 12:38:51,093 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-24 12:38:51,093 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 48 treesize of output 33 [2024-10-24 12:38:51,192 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-24 12:38:51,192 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [686283644] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-24 12:38:51,192 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-24 12:38:51,193 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 6] total 11 [2024-10-24 12:38:51,194 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1880168258] [2024-10-24 12:38:51,194 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-24 12:38:51,195 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-10-24 12:38:51,195 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-24 12:38:51,196 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-10-24 12:38:51,196 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2024-10-24 12:38:51,199 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 20 [2024-10-24 12:38:51,200 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 71 transitions, 590 flow. Second operand has 12 states, 12 states have (on average 5.333333333333333) internal successors, (64), 12 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) [2024-10-24 12:38:51,200 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-24 12:38:51,200 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 20 [2024-10-24 12:38:51,200 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-24 12:38:51,575 INFO L124 PetriNetUnfolderBase]: 257/455 cut-off events. [2024-10-24 12:38:51,575 INFO L125 PetriNetUnfolderBase]: For 1502/1502 co-relation queries the response was YES. [2024-10-24 12:38:51,577 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2272 conditions, 455 events. 257/455 cut-off events. For 1502/1502 co-relation queries the response was YES. Maximal size of possible extension queue 40. Compared 1761 event pairs, 25 based on Foata normal form. 1/456 useless extension candidates. Maximal degree in co-relation 2148. Up to 350 conditions per place. [2024-10-24 12:38:51,580 INFO L140 encePairwiseOnDemand]: 10/20 looper letters, 66 selfloop transitions, 39 changer transitions 3/109 dead transitions. [2024-10-24 12:38:51,581 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 109 transitions, 1045 flow [2024-10-24 12:38:51,581 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-10-24 12:38:51,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-10-24 12:38:51,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 94 transitions. [2024-10-24 12:38:51,584 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.42727272727272725 [2024-10-24 12:38:51,585 INFO L175 Difference]: Start difference. First operand has 68 places, 71 transitions, 590 flow. Second operand 11 states and 94 transitions. [2024-10-24 12:38:51,585 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 109 transitions, 1045 flow [2024-10-24 12:38:51,592 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 109 transitions, 977 flow, removed 21 selfloop flow, removed 3 redundant places. [2024-10-24 12:38:51,595 INFO L231 Difference]: Finished difference. Result has 78 places, 87 transitions, 803 flow [2024-10-24 12:38:51,596 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=542, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=71, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=803, PETRI_PLACES=78, PETRI_TRANSITIONS=87} [2024-10-24 12:38:51,599 INFO L277 CegarLoopForPetriNet]: 21 programPoint places, 57 predicate places. [2024-10-24 12:38:51,599 INFO L471 AbstractCegarLoop]: Abstraction has has 78 places, 87 transitions, 803 flow [2024-10-24 12:38:51,599 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 5.333333333333333) internal successors, (64), 12 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) [2024-10-24 12:38:51,600 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-24 12:38:51,600 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-24 12:38:51,624 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-10-24 12:38:51,800 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-24 12:38:51,801 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-24 12:38:51,801 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 12:38:51,802 INFO L85 PathProgramCache]: Analyzing trace with hash 167384518, now seen corresponding path program 3 times [2024-10-24 12:38:51,802 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 12:38:51,802 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [832358175] [2024-10-24 12:38:51,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 12:38:51,802 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 12:38:51,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 12:38:52,027 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-24 12:38:52,027 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 12:38:52,027 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [832358175] [2024-10-24 12:38:52,027 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [832358175] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-24 12:38:52,028 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1276375255] [2024-10-24 12:38:52,028 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-10-24 12:38:52,028 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-24 12:38:52,028 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-24 12:38:52,030 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) [2024-10-24 12:38:52,032 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-10-24 12:38:52,100 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-10-24 12:38:52,101 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-24 12:38:52,102 INFO L255 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 19 conjuncts are in the unsatisfiable core [2024-10-24 12:38:52,103 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-24 12:38:52,222 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2024-10-24 12:38:52,228 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-24 12:38:52,228 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-24 12:38:52,321 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-24 12:38:52,322 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 77 treesize of output 69 [2024-10-24 12:38:52,465 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-24 12:38:52,465 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1276375255] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-24 12:38:52,465 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-24 12:38:52,466 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 6] total 13 [2024-10-24 12:38:52,466 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1551530968] [2024-10-24 12:38:52,466 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-24 12:38:52,466 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-10-24 12:38:52,467 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-24 12:38:52,467 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-10-24 12:38:52,467 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=128, Unknown=0, NotChecked=0, Total=182 [2024-10-24 12:38:52,468 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 20 [2024-10-24 12:38:52,468 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 87 transitions, 803 flow. Second operand has 14 states, 14 states have (on average 5.142857142857143) internal successors, (72), 14 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 12:38:52,468 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-24 12:38:52,468 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 20 [2024-10-24 12:38:52,468 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-24 12:38:52,841 INFO L124 PetriNetUnfolderBase]: 271/513 cut-off events. [2024-10-24 12:38:52,841 INFO L125 PetriNetUnfolderBase]: For 1632/1632 co-relation queries the response was YES. [2024-10-24 12:38:52,843 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2524 conditions, 513 events. 271/513 cut-off events. For 1632/1632 co-relation queries the response was YES. Maximal size of possible extension queue 47. Compared 2244 event pairs, 0 based on Foata normal form. 1/514 useless extension candidates. Maximal degree in co-relation 2351. Up to 273 conditions per place. [2024-10-24 12:38:52,846 INFO L140 encePairwiseOnDemand]: 11/20 looper letters, 74 selfloop transitions, 56 changer transitions 8/139 dead transitions. [2024-10-24 12:38:52,846 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 91 places, 139 transitions, 1386 flow [2024-10-24 12:38:52,847 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-10-24 12:38:52,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2024-10-24 12:38:52,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 110 transitions. [2024-10-24 12:38:52,848 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.39285714285714285 [2024-10-24 12:38:52,848 INFO L175 Difference]: Start difference. First operand has 78 places, 87 transitions, 803 flow. Second operand 14 states and 110 transitions. [2024-10-24 12:38:52,848 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 91 places, 139 transitions, 1386 flow [2024-10-24 12:38:52,857 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 86 places, 139 transitions, 1328 flow, removed 6 selfloop flow, removed 5 redundant places. [2024-10-24 12:38:52,860 INFO L231 Difference]: Finished difference. Result has 89 places, 106 transitions, 1096 flow [2024-10-24 12:38:52,860 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=751, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=87, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=1096, PETRI_PLACES=89, PETRI_TRANSITIONS=106} [2024-10-24 12:38:52,860 INFO L277 CegarLoopForPetriNet]: 21 programPoint places, 68 predicate places. [2024-10-24 12:38:52,861 INFO L471 AbstractCegarLoop]: Abstraction has has 89 places, 106 transitions, 1096 flow [2024-10-24 12:38:52,861 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 5.142857142857143) internal successors, (72), 14 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 12:38:52,861 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-24 12:38:52,861 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-24 12:38:52,880 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-10-24 12:38:53,065 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-24 12:38:53,066 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-24 12:38:53,066 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 12:38:53,066 INFO L85 PathProgramCache]: Analyzing trace with hash -1034006108, now seen corresponding path program 4 times [2024-10-24 12:38:53,066 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 12:38:53,066 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1397907549] [2024-10-24 12:38:53,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 12:38:53,067 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 12:38:53,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 12:38:53,340 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-24 12:38:53,341 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 12:38:53,341 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1397907549] [2024-10-24 12:38:53,341 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1397907549] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-24 12:38:53,341 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1184751134] [2024-10-24 12:38:53,342 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-10-24 12:38:53,342 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-24 12:38:53,342 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-24 12:38:53,344 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) [2024-10-24 12:38:53,346 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-10-24 12:38:53,415 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-10-24 12:38:53,416 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-24 12:38:53,417 INFO L255 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 13 conjuncts are in the unsatisfiable core [2024-10-24 12:38:53,418 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-24 12:38:53,510 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2024-10-24 12:38:53,516 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-24 12:38:53,518 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-24 12:38:53,626 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-24 12:38:53,627 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 48 treesize of output 33 [2024-10-24 12:38:53,731 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-24 12:38:53,731 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1184751134] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-24 12:38:53,731 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-24 12:38:53,731 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 15 [2024-10-24 12:38:53,732 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1692853063] [2024-10-24 12:38:53,732 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-24 12:38:53,733 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-10-24 12:38:53,734 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-24 12:38:53,734 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-10-24 12:38:53,734 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=170, Unknown=0, NotChecked=0, Total=240 [2024-10-24 12:38:53,735 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 20 [2024-10-24 12:38:53,735 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 89 places, 106 transitions, 1096 flow. Second operand has 16 states, 16 states have (on average 5.3125) internal successors, (85), 16 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 12:38:53,735 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-24 12:38:53,737 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 20 [2024-10-24 12:38:53,737 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-24 12:38:54,060 INFO L124 PetriNetUnfolderBase]: 261/501 cut-off events. [2024-10-24 12:38:54,061 INFO L125 PetriNetUnfolderBase]: For 2151/2151 co-relation queries the response was YES. [2024-10-24 12:38:54,063 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2721 conditions, 501 events. 261/501 cut-off events. For 2151/2151 co-relation queries the response was YES. Maximal size of possible extension queue 45. Compared 2200 event pairs, 26 based on Foata normal form. 2/503 useless extension candidates. Maximal degree in co-relation 2651. Up to 366 conditions per place. [2024-10-24 12:38:54,066 INFO L140 encePairwiseOnDemand]: 11/20 looper letters, 73 selfloop transitions, 46 changer transitions 5/125 dead transitions. [2024-10-24 12:38:54,067 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 96 places, 125 transitions, 1448 flow [2024-10-24 12:38:54,067 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-10-24 12:38:54,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-10-24 12:38:54,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 78 transitions. [2024-10-24 12:38:54,068 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.43333333333333335 [2024-10-24 12:38:54,068 INFO L175 Difference]: Start difference. First operand has 89 places, 106 transitions, 1096 flow. Second operand 9 states and 78 transitions. [2024-10-24 12:38:54,068 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 96 places, 125 transitions, 1448 flow [2024-10-24 12:38:54,078 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 86 places, 125 transitions, 1345 flow, removed 19 selfloop flow, removed 10 redundant places. [2024-10-24 12:38:54,081 INFO L231 Difference]: Finished difference. Result has 88 places, 107 transitions, 1135 flow [2024-10-24 12:38:54,082 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=993, PETRI_DIFFERENCE_MINUEND_PLACES=78, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=106, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1135, PETRI_PLACES=88, PETRI_TRANSITIONS=107} [2024-10-24 12:38:54,084 INFO L277 CegarLoopForPetriNet]: 21 programPoint places, 67 predicate places. [2024-10-24 12:38:54,084 INFO L471 AbstractCegarLoop]: Abstraction has has 88 places, 107 transitions, 1135 flow [2024-10-24 12:38:54,084 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 5.3125) internal successors, (85), 16 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 12:38:54,085 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-24 12:38:54,086 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-24 12:38:54,103 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-10-24 12:38:54,289 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-24 12:38:54,290 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-24 12:38:54,291 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 12:38:54,291 INFO L85 PathProgramCache]: Analyzing trace with hash -626578467, now seen corresponding path program 5 times [2024-10-24 12:38:54,291 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 12:38:54,291 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [836327852] [2024-10-24 12:38:54,291 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 12:38:54,292 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 12:38:54,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 12:38:54,501 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-24 12:38:54,502 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 12:38:54,502 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [836327852] [2024-10-24 12:38:54,502 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [836327852] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-24 12:38:54,502 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [129857674] [2024-10-24 12:38:54,502 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-10-24 12:38:54,502 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-24 12:38:54,503 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-24 12:38:54,504 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) [2024-10-24 12:38:54,509 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-10-24 12:38:54,656 INFO L227 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2024-10-24 12:38:54,657 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-24 12:38:54,658 INFO L255 TraceCheckSpWp]: Trace formula consists of 35 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-10-24 12:38:54,659 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-24 12:38:54,722 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-24 12:38:54,725 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-10-24 12:38:54,725 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [129857674] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-24 12:38:54,725 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-10-24 12:38:54,725 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [7] total 10 [2024-10-24 12:38:54,726 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1461178228] [2024-10-24 12:38:54,726 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-24 12:38:54,726 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-10-24 12:38:54,726 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-24 12:38:54,726 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-10-24 12:38:54,727 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-10-24 12:38:54,727 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 20 [2024-10-24 12:38:54,727 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 88 places, 107 transitions, 1135 flow. Second operand has 5 states, 5 states have (on average 6.2) internal successors, (31), 5 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 12:38:54,727 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-24 12:38:54,727 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 20 [2024-10-24 12:38:54,727 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-24 12:38:54,913 INFO L124 PetriNetUnfolderBase]: 283/548 cut-off events. [2024-10-24 12:38:54,913 INFO L125 PetriNetUnfolderBase]: For 2443/2443 co-relation queries the response was YES. [2024-10-24 12:38:54,915 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3021 conditions, 548 events. 283/548 cut-off events. For 2443/2443 co-relation queries the response was YES. Maximal size of possible extension queue 51. Compared 2457 event pairs, 43 based on Foata normal form. 10/558 useless extension candidates. Maximal degree in co-relation 2901. Up to 216 conditions per place. [2024-10-24 12:38:54,919 INFO L140 encePairwiseOnDemand]: 16/20 looper letters, 93 selfloop transitions, 42 changer transitions 0/136 dead transitions. [2024-10-24 12:38:54,919 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 92 places, 136 transitions, 1633 flow [2024-10-24 12:38:54,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-10-24 12:38:54,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-10-24 12:38:54,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 59 transitions. [2024-10-24 12:38:54,920 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.59 [2024-10-24 12:38:54,920 INFO L175 Difference]: Start difference. First operand has 88 places, 107 transitions, 1135 flow. Second operand 5 states and 59 transitions. [2024-10-24 12:38:54,920 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 92 places, 136 transitions, 1633 flow [2024-10-24 12:38:54,931 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 87 places, 136 transitions, 1540 flow, removed 15 selfloop flow, removed 5 redundant places. [2024-10-24 12:38:54,934 INFO L231 Difference]: Finished difference. Result has 89 places, 114 transitions, 1279 flow [2024-10-24 12:38:54,935 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=1050, PETRI_DIFFERENCE_MINUEND_PLACES=83, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=107, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1279, PETRI_PLACES=89, PETRI_TRANSITIONS=114} [2024-10-24 12:38:54,937 INFO L277 CegarLoopForPetriNet]: 21 programPoint places, 68 predicate places. [2024-10-24 12:38:54,937 INFO L471 AbstractCegarLoop]: Abstraction has has 89 places, 114 transitions, 1279 flow [2024-10-24 12:38:54,937 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 6.2) internal successors, (31), 5 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 12:38:54,937 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-24 12:38:54,938 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-24 12:38:54,955 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2024-10-24 12:38:55,142 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-24 12:38:55,143 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-24 12:38:55,143 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 12:38:55,143 INFO L85 PathProgramCache]: Analyzing trace with hash -1232031080, now seen corresponding path program 2 times [2024-10-24 12:38:55,144 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 12:38:55,144 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2016721021] [2024-10-24 12:38:55,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 12:38:55,144 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 12:38:55,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 12:38:55,353 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-10-24 12:38:55,354 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 12:38:55,354 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2016721021] [2024-10-24 12:38:55,354 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2016721021] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-24 12:38:55,354 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [293861863] [2024-10-24 12:38:55,354 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-24 12:38:55,354 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-24 12:38:55,354 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-24 12:38:55,357 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) [2024-10-24 12:38:55,358 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-10-24 12:38:55,467 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-24 12:38:55,468 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-24 12:38:55,471 INFO L255 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-10-24 12:38:55,472 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-24 12:38:55,515 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-10-24 12:38:55,516 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-24 12:38:55,649 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-10-24 12:38:55,649 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [293861863] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-24 12:38:55,650 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-24 12:38:55,650 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2024-10-24 12:38:55,650 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1100229895] [2024-10-24 12:38:55,650 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-24 12:38:55,650 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-10-24 12:38:55,651 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-24 12:38:55,651 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-10-24 12:38:55,651 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2024-10-24 12:38:55,651 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 20 [2024-10-24 12:38:55,652 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 89 places, 114 transitions, 1279 flow. Second operand has 12 states, 12 states have (on average 5.25) internal successors, (63), 12 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 12:38:55,652 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-24 12:38:55,652 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 20 [2024-10-24 12:38:55,652 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-24 12:38:56,390 INFO L124 PetriNetUnfolderBase]: 401/805 cut-off events. [2024-10-24 12:38:56,390 INFO L125 PetriNetUnfolderBase]: For 4027/4027 co-relation queries the response was YES. [2024-10-24 12:38:56,392 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4359 conditions, 805 events. 401/805 cut-off events. For 4027/4027 co-relation queries the response was YES. Maximal size of possible extension queue 70. Compared 4175 event pairs, 56 based on Foata normal form. 21/825 useless extension candidates. Maximal degree in co-relation 4233. Up to 257 conditions per place. [2024-10-24 12:38:56,397 INFO L140 encePairwiseOnDemand]: 14/20 looper letters, 127 selfloop transitions, 94 changer transitions 0/222 dead transitions. [2024-10-24 12:38:56,398 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 108 places, 222 transitions, 2463 flow [2024-10-24 12:38:56,403 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2024-10-24 12:38:56,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2024-10-24 12:38:56,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 183 transitions. [2024-10-24 12:38:56,404 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4575 [2024-10-24 12:38:56,404 INFO L175 Difference]: Start difference. First operand has 89 places, 114 transitions, 1279 flow. Second operand 20 states and 183 transitions. [2024-10-24 12:38:56,404 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 108 places, 222 transitions, 2463 flow [2024-10-24 12:38:56,425 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 105 places, 222 transitions, 2381 flow, removed 12 selfloop flow, removed 3 redundant places. [2024-10-24 12:38:56,428 INFO L231 Difference]: Finished difference. Result has 116 places, 159 transitions, 2012 flow [2024-10-24 12:38:56,431 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=1210, PETRI_DIFFERENCE_MINUEND_PLACES=86, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=114, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=60, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=2012, PETRI_PLACES=116, PETRI_TRANSITIONS=159} [2024-10-24 12:38:56,432 INFO L277 CegarLoopForPetriNet]: 21 programPoint places, 95 predicate places. [2024-10-24 12:38:56,432 INFO L471 AbstractCegarLoop]: Abstraction has has 116 places, 159 transitions, 2012 flow [2024-10-24 12:38:56,432 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 5.25) internal successors, (63), 12 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 12:38:56,432 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-24 12:38:56,432 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-24 12:38:56,450 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2024-10-24 12:38:56,633 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-24 12:38:56,633 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-24 12:38:56,634 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 12:38:56,634 INFO L85 PathProgramCache]: Analyzing trace with hash 200655015, now seen corresponding path program 6 times [2024-10-24 12:38:56,634 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 12:38:56,634 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1448015099] [2024-10-24 12:38:56,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 12:38:56,634 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 12:38:56,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 12:38:56,796 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-24 12:38:56,797 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 12:38:56,797 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1448015099] [2024-10-24 12:38:56,797 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1448015099] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-24 12:38:56,797 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2083482006] [2024-10-24 12:38:56,797 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-10-24 12:38:56,797 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-24 12:38:56,798 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-24 12:38:56,799 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) [2024-10-24 12:38:56,801 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-10-24 12:38:56,872 INFO L227 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2024-10-24 12:38:56,872 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-24 12:38:56,873 INFO L255 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 32 conjuncts are in the unsatisfiable core [2024-10-24 12:38:56,875 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-24 12:38:56,901 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-10-24 12:38:57,128 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-24 12:38:57,129 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 18 [2024-10-24 12:38:57,150 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 12:38:57,150 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-24 12:38:57,638 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 87 treesize of output 77 [2024-10-24 12:38:57,677 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-24 12:38:57,677 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 216 treesize of output 188 [2024-10-24 12:38:59,095 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 12:38:59,095 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2083482006] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-24 12:38:59,095 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-24 12:38:59,096 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9, 9] total 22 [2024-10-24 12:38:59,096 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1849379255] [2024-10-24 12:38:59,096 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-24 12:38:59,096 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2024-10-24 12:38:59,097 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-24 12:38:59,097 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2024-10-24 12:38:59,098 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=383, Unknown=0, NotChecked=0, Total=462 [2024-10-24 12:38:59,098 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 20 [2024-10-24 12:38:59,098 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 116 places, 159 transitions, 2012 flow. Second operand has 22 states, 22 states have (on average 4.954545454545454) internal successors, (109), 22 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) [2024-10-24 12:38:59,098 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-24 12:38:59,098 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 20 [2024-10-24 12:38:59,098 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-24 12:39:00,930 INFO L124 PetriNetUnfolderBase]: 465/1004 cut-off events. [2024-10-24 12:39:00,930 INFO L125 PetriNetUnfolderBase]: For 7121/7121 co-relation queries the response was YES. [2024-10-24 12:39:00,935 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5977 conditions, 1004 events. 465/1004 cut-off events. For 7121/7121 co-relation queries the response was YES. Maximal size of possible extension queue 97. Compared 5991 event pairs, 22 based on Foata normal form. 34/1037 useless extension candidates. Maximal degree in co-relation 5859. Up to 231 conditions per place. [2024-10-24 12:39:00,942 INFO L140 encePairwiseOnDemand]: 10/20 looper letters, 145 selfloop transitions, 77 changer transitions 79/302 dead transitions. [2024-10-24 12:39:00,942 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 149 places, 302 transitions, 3684 flow [2024-10-24 12:39:00,943 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2024-10-24 12:39:00,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2024-10-24 12:39:00,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 300 transitions. [2024-10-24 12:39:00,944 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.42857142857142855 [2024-10-24 12:39:00,945 INFO L175 Difference]: Start difference. First operand has 116 places, 159 transitions, 2012 flow. Second operand 35 states and 300 transitions. [2024-10-24 12:39:00,945 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 149 places, 302 transitions, 3684 flow [2024-10-24 12:39:00,981 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 147 places, 302 transitions, 3525 flow, removed 73 selfloop flow, removed 2 redundant places. [2024-10-24 12:39:00,986 INFO L231 Difference]: Finished difference. Result has 154 places, 156 transitions, 2004 flow [2024-10-24 12:39:00,986 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=1772, PETRI_DIFFERENCE_MINUEND_PLACES=113, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=153, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=62, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=87, PETRI_DIFFERENCE_SUBTRAHEND_STATES=35, PETRI_FLOW=2004, PETRI_PLACES=154, PETRI_TRANSITIONS=156} [2024-10-24 12:39:00,987 INFO L277 CegarLoopForPetriNet]: 21 programPoint places, 133 predicate places. [2024-10-24 12:39:00,987 INFO L471 AbstractCegarLoop]: Abstraction has has 154 places, 156 transitions, 2004 flow [2024-10-24 12:39:00,987 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 4.954545454545454) internal successors, (109), 22 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) [2024-10-24 12:39:00,987 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-24 12:39:00,988 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-24 12:39:01,001 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2024-10-24 12:39:01,188 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,SelfDestructingSolverStorable11 [2024-10-24 12:39:01,188 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-24 12:39:01,189 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 12:39:01,189 INFO L85 PathProgramCache]: Analyzing trace with hash 857927311, now seen corresponding path program 7 times [2024-10-24 12:39:01,189 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 12:39:01,189 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [187030180] [2024-10-24 12:39:01,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 12:39:01,189 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 12:39:01,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 12:39:01,289 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-24 12:39:01,290 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 12:39:01,290 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [187030180] [2024-10-24 12:39:01,290 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [187030180] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-24 12:39:01,290 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [483328806] [2024-10-24 12:39:01,290 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-10-24 12:39:01,290 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-24 12:39:01,290 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-24 12:39:01,292 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) [2024-10-24 12:39:01,294 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-10-24 12:39:01,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 12:39:01,364 INFO L255 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 30 conjuncts are in the unsatisfiable core [2024-10-24 12:39:01,365 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-24 12:39:01,384 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-10-24 12:39:01,525 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2024-10-24 12:39:01,539 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 12:39:01,540 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-24 12:39:01,996 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 29 [2024-10-24 12:39:02,005 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2024-10-24 12:39:02,006 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 62 treesize of output 41 [2024-10-24 12:39:02,050 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 12:39:02,051 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [483328806] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-24 12:39:02,051 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-24 12:39:02,051 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 9, 9] total 21 [2024-10-24 12:39:02,051 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1737426044] [2024-10-24 12:39:02,051 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-24 12:39:02,052 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-10-24 12:39:02,052 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-24 12:39:02,052 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-10-24 12:39:02,053 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=335, Unknown=0, NotChecked=0, Total=420 [2024-10-24 12:39:02,054 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 20 [2024-10-24 12:39:02,055 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 154 places, 156 transitions, 2004 flow. Second operand has 21 states, 21 states have (on average 5.095238095238095) internal successors, (107), 21 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 12:39:02,055 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-24 12:39:02,055 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 20 [2024-10-24 12:39:02,055 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-24 12:39:02,972 INFO L124 PetriNetUnfolderBase]: 338/745 cut-off events. [2024-10-24 12:39:02,973 INFO L125 PetriNetUnfolderBase]: For 5242/5242 co-relation queries the response was YES. [2024-10-24 12:39:02,976 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4576 conditions, 745 events. 338/745 cut-off events. For 5242/5242 co-relation queries the response was YES. Maximal size of possible extension queue 73. Compared 4137 event pairs, 15 based on Foata normal form. 4/748 useless extension candidates. Maximal degree in co-relation 4456. Up to 245 conditions per place. [2024-10-24 12:39:02,980 INFO L140 encePairwiseOnDemand]: 11/20 looper letters, 141 selfloop transitions, 67 changer transitions 7/216 dead transitions. [2024-10-24 12:39:02,980 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 167 places, 216 transitions, 2728 flow [2024-10-24 12:39:02,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2024-10-24 12:39:02,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2024-10-24 12:39:02,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 198 transitions. [2024-10-24 12:39:02,982 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.36666666666666664 [2024-10-24 12:39:02,982 INFO L175 Difference]: Start difference. First operand has 154 places, 156 transitions, 2004 flow. Second operand 27 states and 198 transitions. [2024-10-24 12:39:02,982 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 167 places, 216 transitions, 2728 flow [2024-10-24 12:39:03,012 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 154 places, 216 transitions, 2446 flow, removed 115 selfloop flow, removed 13 redundant places. [2024-10-24 12:39:03,017 INFO L231 Difference]: Finished difference. Result has 155 places, 152 transitions, 1812 flow [2024-10-24 12:39:03,018 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=1730, PETRI_DIFFERENCE_MINUEND_PLACES=128, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=154, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=65, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=88, PETRI_DIFFERENCE_SUBTRAHEND_STATES=27, PETRI_FLOW=1812, PETRI_PLACES=155, PETRI_TRANSITIONS=152} [2024-10-24 12:39:03,018 INFO L277 CegarLoopForPetriNet]: 21 programPoint places, 134 predicate places. [2024-10-24 12:39:03,018 INFO L471 AbstractCegarLoop]: Abstraction has has 155 places, 152 transitions, 1812 flow [2024-10-24 12:39:03,018 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 5.095238095238095) internal successors, (107), 21 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 12:39:03,019 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-24 12:39:03,019 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-24 12:39:03,037 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2024-10-24 12:39:03,219 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,SelfDestructingSolverStorable12 [2024-10-24 12:39:03,219 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-24 12:39:03,220 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 12:39:03,220 INFO L85 PathProgramCache]: Analyzing trace with hash -1622968242, now seen corresponding path program 3 times [2024-10-24 12:39:03,220 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 12:39:03,220 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [968599031] [2024-10-24 12:39:03,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 12:39:03,221 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 12:39:03,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 12:39:03,346 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-10-24 12:39:03,347 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 12:39:03,347 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [968599031] [2024-10-24 12:39:03,347 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [968599031] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-24 12:39:03,347 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1848253998] [2024-10-24 12:39:03,347 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-10-24 12:39:03,348 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-24 12:39:03,348 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-24 12:39:03,349 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) [2024-10-24 12:39:03,351 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-10-24 12:39:03,447 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-10-24 12:39:03,447 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-24 12:39:03,449 INFO L255 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-10-24 12:39:03,450 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-24 12:39:03,494 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-10-24 12:39:03,494 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-24 12:39:03,660 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-10-24 12:39:03,661 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1848253998] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-24 12:39:03,661 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-24 12:39:03,661 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2024-10-24 12:39:03,661 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1206937655] [2024-10-24 12:39:03,661 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-24 12:39:03,662 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-10-24 12:39:03,662 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-24 12:39:03,662 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-10-24 12:39:03,662 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=88, Unknown=0, NotChecked=0, Total=132 [2024-10-24 12:39:03,663 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 20 [2024-10-24 12:39:03,663 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 155 places, 152 transitions, 1812 flow. Second operand has 12 states, 12 states have (on average 4.916666666666667) internal successors, (59), 12 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 12:39:03,663 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-24 12:39:03,663 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 20 [2024-10-24 12:39:03,663 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-24 12:39:04,130 INFO L124 PetriNetUnfolderBase]: 336/708 cut-off events. [2024-10-24 12:39:04,130 INFO L125 PetriNetUnfolderBase]: For 4230/4230 co-relation queries the response was YES. [2024-10-24 12:39:04,133 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4122 conditions, 708 events. 336/708 cut-off events. For 4230/4230 co-relation queries the response was YES. Maximal size of possible extension queue 70. Compared 3737 event pairs, 50 based on Foata normal form. 18/725 useless extension candidates. Maximal degree in co-relation 4008. Up to 228 conditions per place. [2024-10-24 12:39:04,137 INFO L140 encePairwiseOnDemand]: 14/20 looper letters, 111 selfloop transitions, 83 changer transitions 0/195 dead transitions. [2024-10-24 12:39:04,137 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 164 places, 195 transitions, 2398 flow [2024-10-24 12:39:04,137 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-10-24 12:39:04,137 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2024-10-24 12:39:04,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 143 transitions. [2024-10-24 12:39:04,138 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4766666666666667 [2024-10-24 12:39:04,139 INFO L175 Difference]: Start difference. First operand has 155 places, 152 transitions, 1812 flow. Second operand 15 states and 143 transitions. [2024-10-24 12:39:04,139 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 164 places, 195 transitions, 2398 flow [2024-10-24 12:39:04,155 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 149 places, 195 transitions, 2282 flow, removed 12 selfloop flow, removed 15 redundant places. [2024-10-24 12:39:04,157 INFO L231 Difference]: Finished difference. Result has 152 places, 154 transitions, 1920 flow [2024-10-24 12:39:04,158 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=1643, PETRI_DIFFERENCE_MINUEND_PLACES=135, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=148, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=77, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=1920, PETRI_PLACES=152, PETRI_TRANSITIONS=154} [2024-10-24 12:39:04,158 INFO L277 CegarLoopForPetriNet]: 21 programPoint places, 131 predicate places. [2024-10-24 12:39:04,158 INFO L471 AbstractCegarLoop]: Abstraction has has 152 places, 154 transitions, 1920 flow [2024-10-24 12:39:04,158 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 4.916666666666667) internal successors, (59), 12 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 12:39:04,158 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-24 12:39:04,159 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-24 12:39:04,175 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2024-10-24 12:39:04,359 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,SelfDestructingSolverStorable13 [2024-10-24 12:39:04,359 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-24 12:39:04,360 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 12:39:04,360 INFO L85 PathProgramCache]: Analyzing trace with hash 611139252, now seen corresponding path program 4 times [2024-10-24 12:39:04,360 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 12:39:04,360 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [19566780] [2024-10-24 12:39:04,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 12:39:04,360 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 12:39:04,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 12:39:04,482 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-10-24 12:39:04,483 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 12:39:04,483 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [19566780] [2024-10-24 12:39:04,483 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [19566780] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-24 12:39:04,483 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1324085391] [2024-10-24 12:39:04,483 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-10-24 12:39:04,483 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-24 12:39:04,483 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-24 12:39:04,485 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) [2024-10-24 12:39:04,487 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-10-24 12:39:04,589 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-10-24 12:39:04,589 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-24 12:39:04,590 INFO L255 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-10-24 12:39:04,592 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-24 12:39:04,634 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-10-24 12:39:04,634 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-24 12:39:04,753 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-10-24 12:39:04,754 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1324085391] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-24 12:39:04,754 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-24 12:39:04,754 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2024-10-24 12:39:04,754 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [302409274] [2024-10-24 12:39:04,754 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-24 12:39:04,754 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-10-24 12:39:04,755 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-24 12:39:04,755 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-10-24 12:39:04,755 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2024-10-24 12:39:04,755 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 20 [2024-10-24 12:39:04,756 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 152 places, 154 transitions, 1920 flow. Second operand has 12 states, 12 states have (on average 4.916666666666667) internal successors, (59), 12 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 12:39:04,756 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-24 12:39:04,756 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 20 [2024-10-24 12:39:04,756 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-24 12:39:05,208 INFO L124 PetriNetUnfolderBase]: 523/1032 cut-off events. [2024-10-24 12:39:05,208 INFO L125 PetriNetUnfolderBase]: For 7843/7843 co-relation queries the response was YES. [2024-10-24 12:39:05,214 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6491 conditions, 1032 events. 523/1032 cut-off events. For 7843/7843 co-relation queries the response was YES. Maximal size of possible extension queue 104. Compared 5674 event pairs, 92 based on Foata normal form. 16/1047 useless extension candidates. Maximal degree in co-relation 6365. Up to 540 conditions per place. [2024-10-24 12:39:05,222 INFO L140 encePairwiseOnDemand]: 14/20 looper letters, 141 selfloop transitions, 116 changer transitions 3/261 dead transitions. [2024-10-24 12:39:05,222 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 165 places, 261 transitions, 3636 flow [2024-10-24 12:39:05,222 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-10-24 12:39:05,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2024-10-24 12:39:05,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 132 transitions. [2024-10-24 12:39:05,223 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4714285714285714 [2024-10-24 12:39:05,224 INFO L175 Difference]: Start difference. First operand has 152 places, 154 transitions, 1920 flow. Second operand 14 states and 132 transitions. [2024-10-24 12:39:05,224 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 165 places, 261 transitions, 3636 flow [2024-10-24 12:39:05,261 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 156 places, 261 transitions, 3462 flow, removed 26 selfloop flow, removed 9 redundant places. [2024-10-24 12:39:05,266 INFO L231 Difference]: Finished difference. Result has 162 places, 210 transitions, 2966 flow [2024-10-24 12:39:05,267 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=1781, PETRI_DIFFERENCE_MINUEND_PLACES=143, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=154, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=75, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=70, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=2966, PETRI_PLACES=162, PETRI_TRANSITIONS=210} [2024-10-24 12:39:05,267 INFO L277 CegarLoopForPetriNet]: 21 programPoint places, 141 predicate places. [2024-10-24 12:39:05,267 INFO L471 AbstractCegarLoop]: Abstraction has has 162 places, 210 transitions, 2966 flow [2024-10-24 12:39:05,268 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 4.916666666666667) internal successors, (59), 12 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 12:39:05,268 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-24 12:39:05,268 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-24 12:39:05,287 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2024-10-24 12:39:05,468 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2024-10-24 12:39:05,469 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-24 12:39:05,469 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 12:39:05,469 INFO L85 PathProgramCache]: Analyzing trace with hash 1395782889, now seen corresponding path program 8 times [2024-10-24 12:39:05,469 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 12:39:05,469 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [636487097] [2024-10-24 12:39:05,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 12:39:05,470 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 12:39:05,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 12:39:05,582 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-24 12:39:05,582 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 12:39:05,582 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [636487097] [2024-10-24 12:39:05,583 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [636487097] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-24 12:39:05,583 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [771041286] [2024-10-24 12:39:05,583 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-24 12:39:05,583 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-24 12:39:05,583 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-24 12:39:05,585 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) [2024-10-24 12:39:05,587 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-10-24 12:39:05,660 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-24 12:39:05,660 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-24 12:39:05,661 INFO L255 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 29 conjuncts are in the unsatisfiable core [2024-10-24 12:39:05,663 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-24 12:39:05,691 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-10-24 12:39:05,837 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2024-10-24 12:39:05,837 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 31 [2024-10-24 12:39:05,861 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 12:39:05,861 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-24 12:39:06,152 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 130 treesize of output 116 [2024-10-24 12:39:06,189 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-24 12:39:06,190 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 298 treesize of output 240 [2024-10-24 12:39:07,265 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 12:39:07,265 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [771041286] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-24 12:39:07,265 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-24 12:39:07,265 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 7] total 18 [2024-10-24 12:39:07,265 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1797604445] [2024-10-24 12:39:07,266 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-24 12:39:07,266 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-10-24 12:39:07,266 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-24 12:39:07,267 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-10-24 12:39:07,267 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=251, Unknown=0, NotChecked=0, Total=306 [2024-10-24 12:39:07,267 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 20 [2024-10-24 12:39:07,267 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 162 places, 210 transitions, 2966 flow. Second operand has 18 states, 18 states have (on average 5.666666666666667) internal successors, (102), 18 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 12:39:07,267 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-24 12:39:07,267 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 20 [2024-10-24 12:39:07,267 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-24 12:39:08,274 INFO L124 PetriNetUnfolderBase]: 598/1158 cut-off events. [2024-10-24 12:39:08,275 INFO L125 PetriNetUnfolderBase]: For 11275/11275 co-relation queries the response was YES. [2024-10-24 12:39:08,282 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8002 conditions, 1158 events. 598/1158 cut-off events. For 11275/11275 co-relation queries the response was YES. Maximal size of possible extension queue 112. Compared 6386 event pairs, 23 based on Foata normal form. 8/1165 useless extension candidates. Maximal degree in co-relation 7815. Up to 470 conditions per place. [2024-10-24 12:39:08,291 INFO L140 encePairwiseOnDemand]: 10/20 looper letters, 169 selfloop transitions, 114 changer transitions 50/334 dead transitions. [2024-10-24 12:39:08,291 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 194 places, 334 transitions, 4951 flow [2024-10-24 12:39:08,291 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2024-10-24 12:39:08,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2024-10-24 12:39:08,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 245 transitions. [2024-10-24 12:39:08,295 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.3712121212121212 [2024-10-24 12:39:08,295 INFO L175 Difference]: Start difference. First operand has 162 places, 210 transitions, 2966 flow. Second operand 33 states and 245 transitions. [2024-10-24 12:39:08,295 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 194 places, 334 transitions, 4951 flow [2024-10-24 12:39:08,364 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 185 places, 334 transitions, 4395 flow, removed 255 selfloop flow, removed 9 redundant places. [2024-10-24 12:39:08,369 INFO L231 Difference]: Finished difference. Result has 192 places, 226 transitions, 3250 flow [2024-10-24 12:39:08,370 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=2628, PETRI_DIFFERENCE_MINUEND_PLACES=153, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=210, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=82, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=116, PETRI_DIFFERENCE_SUBTRAHEND_STATES=33, PETRI_FLOW=3250, PETRI_PLACES=192, PETRI_TRANSITIONS=226} [2024-10-24 12:39:08,371 INFO L277 CegarLoopForPetriNet]: 21 programPoint places, 171 predicate places. [2024-10-24 12:39:08,371 INFO L471 AbstractCegarLoop]: Abstraction has has 192 places, 226 transitions, 3250 flow [2024-10-24 12:39:08,371 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 5.666666666666667) internal successors, (102), 18 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 12:39:08,371 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-24 12:39:08,372 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-24 12:39:08,389 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2024-10-24 12:39:08,572 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2024-10-24 12:39:08,573 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-24 12:39:08,573 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 12:39:08,573 INFO L85 PathProgramCache]: Analyzing trace with hash -1019024268, now seen corresponding path program 5 times [2024-10-24 12:39:08,573 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 12:39:08,573 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [174994157] [2024-10-24 12:39:08,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 12:39:08,574 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 12:39:08,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 12:39:08,689 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-10-24 12:39:08,689 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 12:39:08,689 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [174994157] [2024-10-24 12:39:08,690 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [174994157] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-24 12:39:08,690 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1795800951] [2024-10-24 12:39:08,690 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-10-24 12:39:08,690 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-24 12:39:08,690 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-24 12:39:08,692 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) [2024-10-24 12:39:08,693 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-10-24 12:39:08,801 INFO L227 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-24 12:39:08,802 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-24 12:39:08,803 INFO L255 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-10-24 12:39:08,804 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-24 12:39:08,834 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-10-24 12:39:08,834 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-24 12:39:08,931 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-10-24 12:39:08,931 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1795800951] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-24 12:39:08,932 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-24 12:39:08,932 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 11 [2024-10-24 12:39:08,932 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [869547380] [2024-10-24 12:39:08,932 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-24 12:39:08,932 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-10-24 12:39:08,933 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-24 12:39:08,933 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-10-24 12:39:08,933 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2024-10-24 12:39:08,933 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 20 [2024-10-24 12:39:08,933 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 192 places, 226 transitions, 3250 flow. Second operand has 11 states, 11 states have (on average 5.090909090909091) internal successors, (56), 11 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 12:39:08,934 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-24 12:39:08,934 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 20 [2024-10-24 12:39:08,934 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-24 12:39:09,479 INFO L124 PetriNetUnfolderBase]: 560/1049 cut-off events. [2024-10-24 12:39:09,480 INFO L125 PetriNetUnfolderBase]: For 9463/9463 co-relation queries the response was YES. [2024-10-24 12:39:09,486 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7250 conditions, 1049 events. 560/1049 cut-off events. For 9463/9463 co-relation queries the response was YES. Maximal size of possible extension queue 101. Compared 5571 event pairs, 72 based on Foata normal form. 21/1069 useless extension candidates. Maximal degree in co-relation 7174. Up to 417 conditions per place. [2024-10-24 12:39:09,500 INFO L140 encePairwiseOnDemand]: 14/20 looper letters, 156 selfloop transitions, 124 changer transitions 3/284 dead transitions. [2024-10-24 12:39:09,500 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 176 places, 284 transitions, 4401 flow [2024-10-24 12:39:09,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-10-24 12:39:09,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2024-10-24 12:39:09,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 133 transitions. [2024-10-24 12:39:09,503 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.415625 [2024-10-24 12:39:09,503 INFO L175 Difference]: Start difference. First operand has 192 places, 226 transitions, 3250 flow. Second operand 16 states and 133 transitions. [2024-10-24 12:39:09,503 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 176 places, 284 transitions, 4401 flow [2024-10-24 12:39:09,557 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 160 places, 284 transitions, 3935 flow, removed 194 selfloop flow, removed 16 redundant places. [2024-10-24 12:39:09,563 INFO L231 Difference]: Finished difference. Result has 164 places, 235 transitions, 3288 flow [2024-10-24 12:39:09,563 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=2813, PETRI_DIFFERENCE_MINUEND_PLACES=145, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=224, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=114, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=104, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=3288, PETRI_PLACES=164, PETRI_TRANSITIONS=235} [2024-10-24 12:39:09,564 INFO L277 CegarLoopForPetriNet]: 21 programPoint places, 143 predicate places. [2024-10-24 12:39:09,564 INFO L471 AbstractCegarLoop]: Abstraction has has 164 places, 235 transitions, 3288 flow [2024-10-24 12:39:09,564 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 5.090909090909091) internal successors, (56), 11 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 12:39:09,564 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-24 12:39:09,565 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-24 12:39:09,583 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2024-10-24 12:39:09,765 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,SelfDestructingSolverStorable16 [2024-10-24 12:39:09,765 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-24 12:39:09,766 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 12:39:09,766 INFO L85 PathProgramCache]: Analyzing trace with hash 532491012, now seen corresponding path program 6 times [2024-10-24 12:39:09,766 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 12:39:09,766 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [997167685] [2024-10-24 12:39:09,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 12:39:09,766 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 12:39:09,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 12:39:09,933 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-10-24 12:39:09,933 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 12:39:09,934 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [997167685] [2024-10-24 12:39:09,934 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [997167685] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-24 12:39:09,934 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1772065496] [2024-10-24 12:39:09,934 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-10-24 12:39:09,934 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-24 12:39:09,934 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-24 12:39:09,936 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) [2024-10-24 12:39:09,938 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2024-10-24 12:39:10,048 INFO L227 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2024-10-24 12:39:10,048 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-24 12:39:10,049 INFO L255 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-10-24 12:39:10,050 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-24 12:39:10,084 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-10-24 12:39:10,084 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-24 12:39:10,189 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-10-24 12:39:10,190 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1772065496] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-24 12:39:10,190 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-24 12:39:10,190 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2024-10-24 12:39:10,190 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [926361459] [2024-10-24 12:39:10,190 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-24 12:39:10,190 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-10-24 12:39:10,191 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-24 12:39:10,191 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-10-24 12:39:10,191 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2024-10-24 12:39:10,191 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 20 [2024-10-24 12:39:10,191 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 164 places, 235 transitions, 3288 flow. Second operand has 12 states, 12 states have (on average 5.083333333333333) internal successors, (61), 12 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 12:39:10,191 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-24 12:39:10,191 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 20 [2024-10-24 12:39:10,191 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-24 12:39:10,696 INFO L124 PetriNetUnfolderBase]: 552/1039 cut-off events. [2024-10-24 12:39:10,696 INFO L125 PetriNetUnfolderBase]: For 9420/9420 co-relation queries the response was YES. [2024-10-24 12:39:10,702 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7186 conditions, 1039 events. 552/1039 cut-off events. For 9420/9420 co-relation queries the response was YES. Maximal size of possible extension queue 98. Compared 5564 event pairs, 92 based on Foata normal form. 15/1053 useless extension candidates. Maximal degree in co-relation 7113. Up to 616 conditions per place. [2024-10-24 12:39:10,708 INFO L140 encePairwiseOnDemand]: 14/20 looper letters, 158 selfloop transitions, 117 changer transitions 2/278 dead transitions. [2024-10-24 12:39:10,709 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 179 places, 278 transitions, 4144 flow [2024-10-24 12:39:10,709 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-10-24 12:39:10,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2024-10-24 12:39:10,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 136 transitions. [2024-10-24 12:39:10,710 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.425 [2024-10-24 12:39:10,710 INFO L175 Difference]: Start difference. First operand has 164 places, 235 transitions, 3288 flow. Second operand 16 states and 136 transitions. [2024-10-24 12:39:10,710 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 179 places, 278 transitions, 4144 flow [2024-10-24 12:39:10,759 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 173 places, 278 transitions, 4037 flow, removed 32 selfloop flow, removed 6 redundant places. [2024-10-24 12:39:10,765 INFO L231 Difference]: Finished difference. Result has 175 places, 236 transitions, 3488 flow [2024-10-24 12:39:10,765 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=3122, PETRI_DIFFERENCE_MINUEND_PLACES=158, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=230, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=112, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=114, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=3488, PETRI_PLACES=175, PETRI_TRANSITIONS=236} [2024-10-24 12:39:10,765 INFO L277 CegarLoopForPetriNet]: 21 programPoint places, 154 predicate places. [2024-10-24 12:39:10,766 INFO L471 AbstractCegarLoop]: Abstraction has has 175 places, 236 transitions, 3488 flow [2024-10-24 12:39:10,766 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 5.083333333333333) internal successors, (61), 12 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 12:39:10,766 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-24 12:39:10,766 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-24 12:39:10,784 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2024-10-24 12:39:10,966 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-24 12:39:10,967 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-24 12:39:10,967 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 12:39:10,967 INFO L85 PathProgramCache]: Analyzing trace with hash 551757624, now seen corresponding path program 7 times [2024-10-24 12:39:10,967 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 12:39:10,968 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1148163755] [2024-10-24 12:39:10,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 12:39:10,968 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 12:39:10,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 12:39:11,099 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-10-24 12:39:11,099 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 12:39:11,100 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1148163755] [2024-10-24 12:39:11,100 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1148163755] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-24 12:39:11,100 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [290840465] [2024-10-24 12:39:11,100 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-10-24 12:39:11,100 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-24 12:39:11,100 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-24 12:39:11,102 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-24 12:39:11,105 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2024-10-24 12:39:11,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 12:39:11,263 INFO L255 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-10-24 12:39:11,265 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-24 12:39:11,318 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-10-24 12:39:11,319 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-24 12:39:11,383 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-10-24 12:39:11,384 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [290840465] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-24 12:39:11,384 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-24 12:39:11,384 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 13 [2024-10-24 12:39:11,384 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2007747884] [2024-10-24 12:39:11,384 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-24 12:39:11,384 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-10-24 12:39:11,385 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-24 12:39:11,385 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-10-24 12:39:11,385 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2024-10-24 12:39:11,385 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 20 [2024-10-24 12:39:11,385 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 175 places, 236 transitions, 3488 flow. Second operand has 13 states, 13 states have (on average 5.0) internal successors, (65), 13 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 12:39:11,386 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-24 12:39:11,386 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 20 [2024-10-24 12:39:11,386 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-24 12:39:11,944 INFO L124 PetriNetUnfolderBase]: 816/1565 cut-off events. [2024-10-24 12:39:11,944 INFO L125 PetriNetUnfolderBase]: For 15861/15861 co-relation queries the response was YES. [2024-10-24 12:39:11,981 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10858 conditions, 1565 events. 816/1565 cut-off events. For 15861/15861 co-relation queries the response was YES. Maximal size of possible extension queue 126. Compared 9148 event pairs, 49 based on Foata normal form. 14/1578 useless extension candidates. Maximal degree in co-relation 10783. Up to 544 conditions per place. [2024-10-24 12:39:11,993 INFO L140 encePairwiseOnDemand]: 13/20 looper letters, 190 selfloop transitions, 200 changer transitions 0/391 dead transitions. [2024-10-24 12:39:11,993 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 189 places, 391 transitions, 6059 flow [2024-10-24 12:39:11,994 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-10-24 12:39:11,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2024-10-24 12:39:11,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 149 transitions. [2024-10-24 12:39:11,995 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.49666666666666665 [2024-10-24 12:39:11,995 INFO L175 Difference]: Start difference. First operand has 175 places, 236 transitions, 3488 flow. Second operand 15 states and 149 transitions. [2024-10-24 12:39:11,995 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 189 places, 391 transitions, 6059 flow [2024-10-24 12:39:12,089 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 179 places, 391 transitions, 5895 flow, removed 16 selfloop flow, removed 10 redundant places. [2024-10-24 12:39:12,097 INFO L231 Difference]: Finished difference. Result has 187 places, 313 transitions, 5142 flow [2024-10-24 12:39:12,097 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=3280, PETRI_DIFFERENCE_MINUEND_PLACES=165, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=233, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=136, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=5142, PETRI_PLACES=187, PETRI_TRANSITIONS=313} [2024-10-24 12:39:12,098 INFO L277 CegarLoopForPetriNet]: 21 programPoint places, 166 predicate places. [2024-10-24 12:39:12,099 INFO L471 AbstractCegarLoop]: Abstraction has has 187 places, 313 transitions, 5142 flow [2024-10-24 12:39:12,099 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 5.0) internal successors, (65), 13 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 12:39:12,099 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-24 12:39:12,099 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-24 12:39:12,119 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2024-10-24 12:39:12,300 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-24 12:39:12,301 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-24 12:39:12,301 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 12:39:12,302 INFO L85 PathProgramCache]: Analyzing trace with hash -341249668, now seen corresponding path program 8 times [2024-10-24 12:39:12,302 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 12:39:12,302 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [817965292] [2024-10-24 12:39:12,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 12:39:12,302 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 12:39:12,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 12:39:12,511 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-10-24 12:39:12,512 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 12:39:12,512 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [817965292] [2024-10-24 12:39:12,512 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [817965292] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-24 12:39:12,512 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [484954379] [2024-10-24 12:39:12,512 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-24 12:39:12,512 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-24 12:39:12,512 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-24 12:39:12,513 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-24 12:39:12,514 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2024-10-24 12:39:12,596 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-24 12:39:12,597 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-24 12:39:12,600 INFO L255 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-10-24 12:39:12,601 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-24 12:39:12,661 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-10-24 12:39:12,662 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-24 12:39:12,728 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-10-24 12:39:12,728 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [484954379] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-24 12:39:12,728 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-24 12:39:12,728 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 13 [2024-10-24 12:39:12,729 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1523548507] [2024-10-24 12:39:12,729 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-24 12:39:12,729 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-10-24 12:39:12,729 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-24 12:39:12,730 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-10-24 12:39:12,730 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=104, Unknown=0, NotChecked=0, Total=156 [2024-10-24 12:39:12,730 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 20 [2024-10-24 12:39:12,730 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 187 places, 313 transitions, 5142 flow. Second operand has 13 states, 13 states have (on average 5.0) internal successors, (65), 13 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 12:39:12,730 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-24 12:39:12,730 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 20 [2024-10-24 12:39:12,730 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-24 12:39:13,294 INFO L124 PetriNetUnfolderBase]: 815/1556 cut-off events. [2024-10-24 12:39:13,294 INFO L125 PetriNetUnfolderBase]: For 20494/20494 co-relation queries the response was YES. [2024-10-24 12:39:13,302 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11990 conditions, 1556 events. 815/1556 cut-off events. For 20494/20494 co-relation queries the response was YES. Maximal size of possible extension queue 125. Compared 9034 event pairs, 51 based on Foata normal form. 9/1564 useless extension candidates. Maximal degree in co-relation 11908. Up to 556 conditions per place. [2024-10-24 12:39:13,310 INFO L140 encePairwiseOnDemand]: 13/20 looper letters, 181 selfloop transitions, 202 changer transitions 0/384 dead transitions. [2024-10-24 12:39:13,310 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 202 places, 384 transitions, 6663 flow [2024-10-24 12:39:13,311 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-10-24 12:39:13,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2024-10-24 12:39:13,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 143 transitions. [2024-10-24 12:39:13,312 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.446875 [2024-10-24 12:39:13,313 INFO L175 Difference]: Start difference. First operand has 187 places, 313 transitions, 5142 flow. Second operand 16 states and 143 transitions. [2024-10-24 12:39:13,313 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 202 places, 384 transitions, 6663 flow [2024-10-24 12:39:13,430 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 198 places, 384 transitions, 6421 flow, removed 77 selfloop flow, removed 4 redundant places. [2024-10-24 12:39:13,436 INFO L231 Difference]: Finished difference. Result has 202 places, 317 transitions, 5564 flow [2024-10-24 12:39:13,437 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=4852, PETRI_DIFFERENCE_MINUEND_PLACES=183, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=310, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=195, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=110, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=5564, PETRI_PLACES=202, PETRI_TRANSITIONS=317} [2024-10-24 12:39:13,437 INFO L277 CegarLoopForPetriNet]: 21 programPoint places, 181 predicate places. [2024-10-24 12:39:13,437 INFO L471 AbstractCegarLoop]: Abstraction has has 202 places, 317 transitions, 5564 flow [2024-10-24 12:39:13,437 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 5.0) internal successors, (65), 13 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 12:39:13,437 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-24 12:39:13,438 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-24 12:39:13,453 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2024-10-24 12:39:13,641 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-24 12:39:13,642 INFO L396 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-24 12:39:13,642 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 12:39:13,642 INFO L85 PathProgramCache]: Analyzing trace with hash -263196074, now seen corresponding path program 9 times [2024-10-24 12:39:13,642 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 12:39:13,642 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1407634585] [2024-10-24 12:39:13,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 12:39:13,642 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 12:39:13,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 12:39:13,762 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-10-24 12:39:13,762 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 12:39:13,762 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1407634585] [2024-10-24 12:39:13,762 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1407634585] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-24 12:39:13,762 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1315811651] [2024-10-24 12:39:13,762 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-10-24 12:39:13,763 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-24 12:39:13,763 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-24 12:39:13,765 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-24 12:39:13,766 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2024-10-24 12:39:13,858 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-10-24 12:39:13,858 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-24 12:39:13,859 INFO L255 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-10-24 12:39:13,860 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-24 12:39:13,915 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-10-24 12:39:13,915 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-24 12:39:14,068 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-10-24 12:39:14,068 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1315811651] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-24 12:39:14,068 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-24 12:39:14,068 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2024-10-24 12:39:14,068 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1483574671] [2024-10-24 12:39:14,069 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-24 12:39:14,069 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-10-24 12:39:14,069 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-24 12:39:14,069 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-10-24 12:39:14,069 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2024-10-24 12:39:14,070 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 20 [2024-10-24 12:39:14,070 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 202 places, 317 transitions, 5564 flow. Second operand has 12 states, 12 states have (on average 5.0) internal successors, (60), 12 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 12:39:14,070 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-24 12:39:14,070 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 20 [2024-10-24 12:39:14,070 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-24 12:39:14,845 INFO L124 PetriNetUnfolderBase]: 910/1747 cut-off events. [2024-10-24 12:39:14,845 INFO L125 PetriNetUnfolderBase]: For 26118/26118 co-relation queries the response was YES. [2024-10-24 12:39:14,853 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13976 conditions, 1747 events. 910/1747 cut-off events. For 26118/26118 co-relation queries the response was YES. Maximal size of possible extension queue 128. Compared 10373 event pairs, 30 based on Foata normal form. 6/1752 useless extension candidates. Maximal degree in co-relation 13891. Up to 472 conditions per place. [2024-10-24 12:39:14,864 INFO L140 encePairwiseOnDemand]: 14/20 looper letters, 231 selfloop transitions, 184 changer transitions 0/416 dead transitions. [2024-10-24 12:39:14,864 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 218 places, 416 transitions, 7686 flow [2024-10-24 12:39:14,865 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-10-24 12:39:14,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2024-10-24 12:39:14,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 160 transitions. [2024-10-24 12:39:14,866 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.47058823529411764 [2024-10-24 12:39:14,866 INFO L175 Difference]: Start difference. First operand has 202 places, 317 transitions, 5564 flow. Second operand 17 states and 160 transitions. [2024-10-24 12:39:14,866 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 218 places, 416 transitions, 7686 flow [2024-10-24 12:39:15,023 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 210 places, 416 transitions, 7546 flow, removed 14 selfloop flow, removed 8 redundant places. [2024-10-24 12:39:15,032 INFO L231 Difference]: Finished difference. Result has 212 places, 327 transitions, 6069 flow [2024-10-24 12:39:15,033 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=5376, PETRI_DIFFERENCE_MINUEND_PLACES=194, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=315, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=172, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=137, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=6069, PETRI_PLACES=212, PETRI_TRANSITIONS=327} [2024-10-24 12:39:15,034 INFO L277 CegarLoopForPetriNet]: 21 programPoint places, 191 predicate places. [2024-10-24 12:39:15,034 INFO L471 AbstractCegarLoop]: Abstraction has has 212 places, 327 transitions, 6069 flow [2024-10-24 12:39:15,034 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 5.0) internal successors, (60), 12 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 12:39:15,034 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-24 12:39:15,035 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-24 12:39:15,053 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2024-10-24 12:39:15,235 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-24 12:39:15,235 INFO L396 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-24 12:39:15,236 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 12:39:15,236 INFO L85 PathProgramCache]: Analyzing trace with hash -1100359369, now seen corresponding path program 1 times [2024-10-24 12:39:15,236 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 12:39:15,236 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [107208340] [2024-10-24 12:39:15,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 12:39:15,236 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 12:39:15,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 12:39:15,426 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-10-24 12:39:15,426 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 12:39:15,426 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [107208340] [2024-10-24 12:39:15,426 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [107208340] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-24 12:39:15,427 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1980982702] [2024-10-24 12:39:15,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 12:39:15,427 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-24 12:39:15,427 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-24 12:39:15,429 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-24 12:39:15,431 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2024-10-24 12:39:15,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 12:39:15,542 INFO L255 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-10-24 12:39:15,543 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-24 12:39:15,612 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-10-24 12:39:15,613 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-24 12:39:19,983 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-10-24 12:39:19,983 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1980982702] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-24 12:39:19,983 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-24 12:39:19,983 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 10 [2024-10-24 12:39:19,983 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [264570595] [2024-10-24 12:39:19,984 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-24 12:39:19,984 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-10-24 12:39:19,984 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-24 12:39:19,984 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-10-24 12:39:19,985 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=66, Unknown=1, NotChecked=0, Total=90 [2024-10-24 12:39:19,985 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 20 [2024-10-24 12:39:19,985 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 212 places, 327 transitions, 6069 flow. Second operand has 10 states, 10 states have (on average 5.5) internal successors, (55), 10 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 12:39:19,985 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-24 12:39:19,985 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 20 [2024-10-24 12:39:19,985 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-24 12:39:31,890 WARN L286 SmtUtils]: Spent 11.81s on a formula simplification. DAG size of input: 33 DAG size of output: 15 (called from [L 388] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-10-24 12:39:36,454 INFO L124 PetriNetUnfolderBase]: 820/1612 cut-off events. [2024-10-24 12:39:36,454 INFO L125 PetriNetUnfolderBase]: For 27617/27617 co-relation queries the response was YES. [2024-10-24 12:39:36,464 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13218 conditions, 1612 events. 820/1612 cut-off events. For 27617/27617 co-relation queries the response was YES. Maximal size of possible extension queue 120. Compared 9636 event pairs, 104 based on Foata normal form. 51/1662 useless extension candidates. Maximal degree in co-relation 13131. Up to 462 conditions per place. [2024-10-24 12:39:36,472 INFO L140 encePairwiseOnDemand]: 14/20 looper letters, 187 selfloop transitions, 157 changer transitions 12/357 dead transitions. [2024-10-24 12:39:36,472 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 219 places, 357 transitions, 6998 flow [2024-10-24 12:39:36,473 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-10-24 12:39:36,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-10-24 12:39:36,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 86 transitions. [2024-10-24 12:39:36,474 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4777777777777778 [2024-10-24 12:39:36,474 INFO L175 Difference]: Start difference. First operand has 212 places, 327 transitions, 6069 flow. Second operand 9 states and 86 transitions. [2024-10-24 12:39:36,474 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 219 places, 357 transitions, 6998 flow [2024-10-24 12:39:36,614 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 214 places, 357 transitions, 6691 flow, removed 74 selfloop flow, removed 5 redundant places. [2024-10-24 12:39:36,621 INFO L231 Difference]: Finished difference. Result has 215 places, 323 transitions, 6083 flow [2024-10-24 12:39:36,622 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=5417, PETRI_DIFFERENCE_MINUEND_PLACES=206, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=311, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=137, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=170, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6083, PETRI_PLACES=215, PETRI_TRANSITIONS=323} [2024-10-24 12:39:36,622 INFO L277 CegarLoopForPetriNet]: 21 programPoint places, 194 predicate places. [2024-10-24 12:39:36,623 INFO L471 AbstractCegarLoop]: Abstraction has has 215 places, 323 transitions, 6083 flow [2024-10-24 12:39:36,623 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 5.5) internal successors, (55), 10 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 12:39:36,623 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-24 12:39:36,623 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-24 12:39:36,640 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2024-10-24 12:39:36,823 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-24 12:39:36,824 INFO L396 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-24 12:39:36,824 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 12:39:36,824 INFO L85 PathProgramCache]: Analyzing trace with hash 2101184528, now seen corresponding path program 9 times [2024-10-24 12:39:36,824 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 12:39:36,824 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1625073092] [2024-10-24 12:39:36,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 12:39:36,825 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 12:39:36,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 12:39:36,998 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-10-24 12:39:36,999 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 12:39:36,999 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1625073092] [2024-10-24 12:39:36,999 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1625073092] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-24 12:39:37,000 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1415952489] [2024-10-24 12:39:37,000 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-10-24 12:39:37,000 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-24 12:39:37,000 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-24 12:39:37,002 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-24 12:39:37,008 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2024-10-24 12:39:37,109 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-10-24 12:39:37,110 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-24 12:39:37,113 INFO L255 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-10-24 12:39:37,114 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-24 12:39:37,180 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-10-24 12:39:37,180 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-24 12:39:37,300 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-10-24 12:39:37,301 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1415952489] provided 1 perfect and 1 imperfect interpolant sequences [2024-10-24 12:39:37,301 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-10-24 12:39:37,301 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [7, 6] total 13 [2024-10-24 12:39:37,301 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1164240333] [2024-10-24 12:39:37,301 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-24 12:39:37,302 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-10-24 12:39:37,302 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-24 12:39:37,302 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-10-24 12:39:37,302 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=109, Unknown=0, NotChecked=0, Total=156 [2024-10-24 12:39:37,303 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 20 [2024-10-24 12:39:37,303 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 215 places, 323 transitions, 6083 flow. Second operand has 5 states, 5 states have (on average 6.2) internal successors, (31), 5 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 12:39:37,303 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-24 12:39:37,303 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 20 [2024-10-24 12:39:37,303 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-24 12:39:37,768 INFO L124 PetriNetUnfolderBase]: 815/1626 cut-off events. [2024-10-24 12:39:37,769 INFO L125 PetriNetUnfolderBase]: For 26279/26279 co-relation queries the response was YES. [2024-10-24 12:39:37,779 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13582 conditions, 1626 events. 815/1626 cut-off events. For 26279/26279 co-relation queries the response was YES. Maximal size of possible extension queue 118. Compared 9854 event pairs, 41 based on Foata normal form. 5/1630 useless extension candidates. Maximal degree in co-relation 13495. Up to 988 conditions per place. [2024-10-24 12:39:37,788 INFO L140 encePairwiseOnDemand]: 13/20 looper letters, 241 selfloop transitions, 101 changer transitions 0/343 dead transitions. [2024-10-24 12:39:37,788 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 215 places, 343 transitions, 6992 flow [2024-10-24 12:39:37,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-10-24 12:39:37,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-10-24 12:39:37,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 57 transitions. [2024-10-24 12:39:37,789 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.57 [2024-10-24 12:39:37,789 INFO L175 Difference]: Start difference. First operand has 215 places, 323 transitions, 6083 flow. Second operand 5 states and 57 transitions. [2024-10-24 12:39:37,790 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 215 places, 343 transitions, 6992 flow [2024-10-24 12:39:37,931 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 209 places, 343 transitions, 6756 flow, removed 39 selfloop flow, removed 6 redundant places. [2024-10-24 12:39:37,936 INFO L231 Difference]: Finished difference. Result has 212 places, 331 transitions, 6410 flow [2024-10-24 12:39:37,936 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=5800, PETRI_DIFFERENCE_MINUEND_PLACES=205, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=320, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=90, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=223, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=6410, PETRI_PLACES=212, PETRI_TRANSITIONS=331} [2024-10-24 12:39:37,936 INFO L277 CegarLoopForPetriNet]: 21 programPoint places, 191 predicate places. [2024-10-24 12:39:37,937 INFO L471 AbstractCegarLoop]: Abstraction has has 212 places, 331 transitions, 6410 flow [2024-10-24 12:39:37,937 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 6.2) internal successors, (31), 5 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 12:39:37,937 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-24 12:39:37,937 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-24 12:39:37,950 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2024-10-24 12:39:38,137 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-24 12:39:38,138 INFO L396 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-24 12:39:38,138 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 12:39:38,138 INFO L85 PathProgramCache]: Analyzing trace with hash 1468650046, now seen corresponding path program 10 times [2024-10-24 12:39:38,138 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 12:39:38,138 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1783239244] [2024-10-24 12:39:38,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 12:39:38,138 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 12:39:38,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 12:39:38,259 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-10-24 12:39:38,260 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 12:39:38,260 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1783239244] [2024-10-24 12:39:38,260 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1783239244] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-24 12:39:38,260 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1122625542] [2024-10-24 12:39:38,260 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-10-24 12:39:38,260 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-24 12:39:38,260 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-24 12:39:38,262 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-24 12:39:38,264 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2024-10-24 12:39:38,361 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-10-24 12:39:38,361 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-24 12:39:38,362 INFO L255 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 12 conjuncts are in the unsatisfiable core [2024-10-24 12:39:38,363 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-24 12:39:38,402 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-10-24 12:39:38,402 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-24 12:39:38,527 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-10-24 12:39:38,528 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1122625542] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-24 12:39:38,528 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-24 12:39:38,528 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 14 [2024-10-24 12:39:38,528 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [781051744] [2024-10-24 12:39:38,528 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-24 12:39:38,528 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-10-24 12:39:38,528 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-24 12:39:38,529 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-10-24 12:39:38,529 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2024-10-24 12:39:38,529 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 20 [2024-10-24 12:39:38,529 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 212 places, 331 transitions, 6410 flow. Second operand has 14 states, 14 states have (on average 5.071428571428571) internal successors, (71), 14 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 12:39:38,529 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-24 12:39:38,529 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 20 [2024-10-24 12:39:38,529 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-24 12:39:39,392 INFO L124 PetriNetUnfolderBase]: 823/1646 cut-off events. [2024-10-24 12:39:39,392 INFO L125 PetriNetUnfolderBase]: For 27844/27844 co-relation queries the response was YES. [2024-10-24 12:39:39,399 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13801 conditions, 1646 events. 823/1646 cut-off events. For 27844/27844 co-relation queries the response was YES. Maximal size of possible extension queue 121. Compared 10047 event pairs, 98 based on Foata normal form. 12/1657 useless extension candidates. Maximal degree in co-relation 13714. Up to 479 conditions per place. [2024-10-24 12:39:39,405 INFO L140 encePairwiseOnDemand]: 14/20 looper letters, 191 selfloop transitions, 187 changer transitions 2/381 dead transitions. [2024-10-24 12:39:39,405 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 228 places, 381 transitions, 7517 flow [2024-10-24 12:39:39,405 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-10-24 12:39:39,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2024-10-24 12:39:39,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 136 transitions. [2024-10-24 12:39:39,406 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4 [2024-10-24 12:39:39,406 INFO L175 Difference]: Start difference. First operand has 212 places, 331 transitions, 6410 flow. Second operand 17 states and 136 transitions. [2024-10-24 12:39:39,406 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 228 places, 381 transitions, 7517 flow [2024-10-24 12:39:39,553 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 228 places, 381 transitions, 7507 flow, removed 5 selfloop flow, removed 0 redundant places. [2024-10-24 12:39:39,561 INFO L231 Difference]: Finished difference. Result has 232 places, 335 transitions, 6849 flow [2024-10-24 12:39:39,561 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=6400, PETRI_DIFFERENCE_MINUEND_PLACES=212, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=331, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=183, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=145, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=6849, PETRI_PLACES=232, PETRI_TRANSITIONS=335} [2024-10-24 12:39:39,562 INFO L277 CegarLoopForPetriNet]: 21 programPoint places, 211 predicate places. [2024-10-24 12:39:39,562 INFO L471 AbstractCegarLoop]: Abstraction has has 232 places, 335 transitions, 6849 flow [2024-10-24 12:39:39,562 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 5.071428571428571) internal successors, (71), 14 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 12:39:39,562 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-24 12:39:39,562 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-24 12:39:39,576 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2024-10-24 12:39:39,762 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2024-10-24 12:39:39,763 INFO L396 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-24 12:39:39,763 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 12:39:39,763 INFO L85 PathProgramCache]: Analyzing trace with hash 1028099148, now seen corresponding path program 10 times [2024-10-24 12:39:39,763 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 12:39:39,763 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [295632886] [2024-10-24 12:39:39,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 12:39:39,764 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 12:39:39,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 12:39:39,932 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-10-24 12:39:39,932 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 12:39:39,932 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [295632886] [2024-10-24 12:39:39,933 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [295632886] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-24 12:39:39,933 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1365584330] [2024-10-24 12:39:39,933 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-10-24 12:39:39,933 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-24 12:39:39,933 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-24 12:39:39,935 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-24 12:39:39,936 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2024-10-24 12:39:40,038 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-10-24 12:39:40,038 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-24 12:39:40,040 INFO L255 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 12 conjuncts are in the unsatisfiable core [2024-10-24 12:39:40,041 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-24 12:39:40,113 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-10-24 12:39:40,114 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-24 12:39:40,312 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-10-24 12:39:40,312 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1365584330] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-24 12:39:40,312 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-24 12:39:40,312 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 6] total 14 [2024-10-24 12:39:40,313 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1232647833] [2024-10-24 12:39:40,313 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-24 12:39:40,313 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-10-24 12:39:40,314 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-24 12:39:40,315 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-10-24 12:39:40,316 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=126, Unknown=0, NotChecked=0, Total=182 [2024-10-24 12:39:40,316 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 20 [2024-10-24 12:39:40,316 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 232 places, 335 transitions, 6849 flow. Second operand has 14 states, 14 states have (on average 5.142857142857143) internal successors, (72), 14 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 12:39:40,316 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-24 12:39:40,316 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 20 [2024-10-24 12:39:40,316 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-24 12:39:41,170 INFO L124 PetriNetUnfolderBase]: 906/1834 cut-off events. [2024-10-24 12:39:41,170 INFO L125 PetriNetUnfolderBase]: For 34975/34975 co-relation queries the response was YES. [2024-10-24 12:39:41,178 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16009 conditions, 1834 events. 906/1834 cut-off events. For 34975/34975 co-relation queries the response was YES. Maximal size of possible extension queue 142. Compared 11649 event pairs, 150 based on Foata normal form. 27/1860 useless extension candidates. Maximal degree in co-relation 15917. Up to 775 conditions per place. [2024-10-24 12:39:41,184 INFO L140 encePairwiseOnDemand]: 13/20 looper letters, 264 selfloop transitions, 154 changer transitions 2/421 dead transitions. [2024-10-24 12:39:41,184 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 249 places, 421 transitions, 8791 flow [2024-10-24 12:39:41,184 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2024-10-24 12:39:41,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2024-10-24 12:39:41,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 166 transitions. [2024-10-24 12:39:41,185 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.46111111111111114 [2024-10-24 12:39:41,185 INFO L175 Difference]: Start difference. First operand has 232 places, 335 transitions, 6849 flow. Second operand 18 states and 166 transitions. [2024-10-24 12:39:41,185 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 249 places, 421 transitions, 8791 flow [2024-10-24 12:39:41,305 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 241 places, 421 transitions, 8395 flow, removed 21 selfloop flow, removed 8 redundant places. [2024-10-24 12:39:41,311 INFO L231 Difference]: Finished difference. Result has 250 places, 366 transitions, 7660 flow [2024-10-24 12:39:41,311 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=6428, PETRI_DIFFERENCE_MINUEND_PLACES=224, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=333, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=125, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=196, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=7660, PETRI_PLACES=250, PETRI_TRANSITIONS=366} [2024-10-24 12:39:41,312 INFO L277 CegarLoopForPetriNet]: 21 programPoint places, 229 predicate places. [2024-10-24 12:39:41,312 INFO L471 AbstractCegarLoop]: Abstraction has has 250 places, 366 transitions, 7660 flow [2024-10-24 12:39:41,312 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 5.142857142857143) internal successors, (72), 14 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 12:39:41,312 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-24 12:39:41,312 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-24 12:39:41,324 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2024-10-24 12:39:41,513 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2024-10-24 12:39:41,513 INFO L396 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-24 12:39:41,513 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 12:39:41,513 INFO L85 PathProgramCache]: Analyzing trace with hash 258102890, now seen corresponding path program 11 times [2024-10-24 12:39:41,514 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 12:39:41,514 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [932999404] [2024-10-24 12:39:41,514 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 12:39:41,514 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 12:39:41,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 12:39:41,651 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-10-24 12:39:41,652 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 12:39:41,652 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [932999404] [2024-10-24 12:39:41,652 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [932999404] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-24 12:39:41,652 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [600571380] [2024-10-24 12:39:41,652 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-10-24 12:39:41,652 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-24 12:39:41,652 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-24 12:39:41,654 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-24 12:39:41,655 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2024-10-24 12:39:41,770 INFO L227 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-24 12:39:41,770 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-24 12:39:41,774 INFO L255 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 12 conjuncts are in the unsatisfiable core [2024-10-24 12:39:41,775 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-24 12:39:41,821 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-10-24 12:39:41,821 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-24 12:39:41,970 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-10-24 12:39:41,971 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [600571380] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-24 12:39:41,971 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-24 12:39:41,971 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 13 [2024-10-24 12:39:41,971 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1846465299] [2024-10-24 12:39:41,971 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-24 12:39:41,971 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-10-24 12:39:41,972 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-24 12:39:41,972 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-10-24 12:39:41,972 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2024-10-24 12:39:41,972 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 20 [2024-10-24 12:39:41,972 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 250 places, 366 transitions, 7660 flow. Second operand has 13 states, 13 states have (on average 5.0) internal successors, (65), 13 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 12:39:41,972 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-24 12:39:41,972 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 20 [2024-10-24 12:39:41,973 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-24 12:39:42,621 INFO L124 PetriNetUnfolderBase]: 943/1891 cut-off events. [2024-10-24 12:39:42,621 INFO L125 PetriNetUnfolderBase]: For 37244/37244 co-relation queries the response was YES. [2024-10-24 12:39:42,636 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16853 conditions, 1891 events. 943/1891 cut-off events. For 37244/37244 co-relation queries the response was YES. Maximal size of possible extension queue 145. Compared 11947 event pairs, 137 based on Foata normal form. 22/1912 useless extension candidates. Maximal degree in co-relation 16753. Up to 639 conditions per place. [2024-10-24 12:39:42,645 INFO L140 encePairwiseOnDemand]: 14/20 looper letters, 287 selfloop transitions, 131 changer transitions 2/421 dead transitions. [2024-10-24 12:39:42,645 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 264 places, 421 transitions, 9126 flow [2024-10-24 12:39:42,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-10-24 12:39:42,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2024-10-24 12:39:42,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 133 transitions. [2024-10-24 12:39:42,646 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.415625 [2024-10-24 12:39:42,647 INFO L175 Difference]: Start difference. First operand has 250 places, 366 transitions, 7660 flow. Second operand 16 states and 133 transitions. [2024-10-24 12:39:42,647 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 264 places, 421 transitions, 9126 flow [2024-10-24 12:39:42,797 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 257 places, 421 transitions, 8935 flow, removed 66 selfloop flow, removed 7 redundant places. [2024-10-24 12:39:42,803 INFO L231 Difference]: Finished difference. Result has 258 places, 371 transitions, 7844 flow [2024-10-24 12:39:42,804 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=7417, PETRI_DIFFERENCE_MINUEND_PLACES=242, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=364, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=123, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=233, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=7844, PETRI_PLACES=258, PETRI_TRANSITIONS=371} [2024-10-24 12:39:42,804 INFO L277 CegarLoopForPetriNet]: 21 programPoint places, 237 predicate places. [2024-10-24 12:39:42,804 INFO L471 AbstractCegarLoop]: Abstraction has has 258 places, 371 transitions, 7844 flow [2024-10-24 12:39:42,804 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 5.0) internal successors, (65), 13 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 12:39:42,804 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-24 12:39:42,804 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-24 12:39:42,819 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2024-10-24 12:39:43,008 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2024-10-24 12:39:43,009 INFO L396 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-24 12:39:43,009 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 12:39:43,009 INFO L85 PathProgramCache]: Analyzing trace with hash 1372769990, now seen corresponding path program 11 times [2024-10-24 12:39:43,009 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 12:39:43,009 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [596657379] [2024-10-24 12:39:43,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 12:39:43,009 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 12:39:43,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 12:39:43,149 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-10-24 12:39:43,150 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 12:39:43,150 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [596657379] [2024-10-24 12:39:43,150 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [596657379] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-24 12:39:43,150 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2086975544] [2024-10-24 12:39:43,150 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-10-24 12:39:43,150 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-24 12:39:43,151 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-24 12:39:43,152 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-24 12:39:43,153 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2024-10-24 12:39:43,296 INFO L227 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-24 12:39:43,296 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-24 12:39:43,297 INFO L255 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 11 conjuncts are in the unsatisfiable core [2024-10-24 12:39:43,297 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-24 12:39:43,332 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-10-24 12:39:43,332 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-24 12:39:43,440 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-10-24 12:39:43,441 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2086975544] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-24 12:39:43,441 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-24 12:39:43,441 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 14 [2024-10-24 12:39:43,441 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1853121789] [2024-10-24 12:39:43,441 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-24 12:39:43,441 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-10-24 12:39:43,441 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-24 12:39:43,442 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-10-24 12:39:43,442 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2024-10-24 12:39:43,442 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 20 [2024-10-24 12:39:43,442 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 258 places, 371 transitions, 7844 flow. Second operand has 14 states, 14 states have (on average 4.928571428571429) internal successors, (69), 14 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 12:39:43,442 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-24 12:39:43,442 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 20 [2024-10-24 12:39:43,442 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-24 12:39:44,263 INFO L124 PetriNetUnfolderBase]: 947/1905 cut-off events. [2024-10-24 12:39:44,263 INFO L125 PetriNetUnfolderBase]: For 36374/36374 co-relation queries the response was YES. [2024-10-24 12:39:44,271 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17185 conditions, 1905 events. 947/1905 cut-off events. For 36374/36374 co-relation queries the response was YES. Maximal size of possible extension queue 149. Compared 12145 event pairs, 126 based on Foata normal form. 15/1919 useless extension candidates. Maximal degree in co-relation 17085. Up to 609 conditions per place. [2024-10-24 12:39:44,277 INFO L140 encePairwiseOnDemand]: 14/20 looper letters, 228 selfloop transitions, 193 changer transitions 1/423 dead transitions. [2024-10-24 12:39:44,277 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 273 places, 423 transitions, 9039 flow [2024-10-24 12:39:44,278 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2024-10-24 12:39:44,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2024-10-24 12:39:44,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 150 transitions. [2024-10-24 12:39:44,278 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4166666666666667 [2024-10-24 12:39:44,278 INFO L175 Difference]: Start difference. First operand has 258 places, 371 transitions, 7844 flow. Second operand 18 states and 150 transitions. [2024-10-24 12:39:44,278 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 273 places, 423 transitions, 9039 flow [2024-10-24 12:39:44,423 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 265 places, 423 transitions, 8863 flow, removed 7 selfloop flow, removed 8 redundant places. [2024-10-24 12:39:44,430 INFO L231 Difference]: Finished difference. Result has 266 places, 375 transitions, 8134 flow [2024-10-24 12:39:44,430 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=7650, PETRI_DIFFERENCE_MINUEND_PLACES=248, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=370, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=190, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=179, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=8134, PETRI_PLACES=266, PETRI_TRANSITIONS=375} [2024-10-24 12:39:44,431 INFO L277 CegarLoopForPetriNet]: 21 programPoint places, 245 predicate places. [2024-10-24 12:39:44,431 INFO L471 AbstractCegarLoop]: Abstraction has has 266 places, 375 transitions, 8134 flow [2024-10-24 12:39:44,431 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 4.928571428571429) internal successors, (69), 14 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 12:39:44,431 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-24 12:39:44,431 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-24 12:39:44,444 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2024-10-24 12:39:44,631 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-24 12:39:44,632 INFO L396 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-24 12:39:44,632 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 12:39:44,632 INFO L85 PathProgramCache]: Analyzing trace with hash -1735772862, now seen corresponding path program 12 times [2024-10-24 12:39:44,632 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 12:39:44,632 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [183756666] [2024-10-24 12:39:44,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 12:39:44,632 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 12:39:44,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 12:39:44,796 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-10-24 12:39:44,796 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 12:39:44,796 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [183756666] [2024-10-24 12:39:44,796 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [183756666] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-24 12:39:44,797 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [656862365] [2024-10-24 12:39:44,797 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-10-24 12:39:44,797 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-24 12:39:44,797 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-24 12:39:44,798 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-24 12:39:44,799 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2024-10-24 12:39:44,885 INFO L227 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2024-10-24 12:39:44,885 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-24 12:39:44,886 INFO L255 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-10-24 12:39:44,887 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-24 12:39:44,934 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-10-24 12:39:44,934 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-24 12:39:45,049 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-10-24 12:39:45,050 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [656862365] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-24 12:39:45,050 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-24 12:39:45,050 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 13 [2024-10-24 12:39:45,050 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1659540541] [2024-10-24 12:39:45,050 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-24 12:39:45,050 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-10-24 12:39:45,050 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-24 12:39:45,051 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-10-24 12:39:45,051 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2024-10-24 12:39:45,051 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 20 [2024-10-24 12:39:45,051 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 266 places, 375 transitions, 8134 flow. Second operand has 13 states, 13 states have (on average 5.0) internal successors, (65), 13 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 12:39:45,051 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-24 12:39:45,051 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 20 [2024-10-24 12:39:45,051 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-24 12:39:45,972 INFO L124 PetriNetUnfolderBase]: 962/1958 cut-off events. [2024-10-24 12:39:45,972 INFO L125 PetriNetUnfolderBase]: For 39600/39600 co-relation queries the response was YES. [2024-10-24 12:39:45,981 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17813 conditions, 1958 events. 962/1958 cut-off events. For 39600/39600 co-relation queries the response was YES. Maximal size of possible extension queue 153. Compared 12701 event pairs, 208 based on Foata normal form. 4/1961 useless extension candidates. Maximal degree in co-relation 17711. Up to 960 conditions per place. [2024-10-24 12:39:45,988 INFO L140 encePairwiseOnDemand]: 14/20 looper letters, 335 selfloop transitions, 77 changer transitions 5/418 dead transitions. [2024-10-24 12:39:45,988 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 279 places, 418 transitions, 9466 flow [2024-10-24 12:39:45,989 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-10-24 12:39:45,989 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2024-10-24 12:39:45,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 114 transitions. [2024-10-24 12:39:45,990 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.40714285714285714 [2024-10-24 12:39:45,990 INFO L175 Difference]: Start difference. First operand has 266 places, 375 transitions, 8134 flow. Second operand 14 states and 114 transitions. [2024-10-24 12:39:45,990 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 279 places, 418 transitions, 9466 flow [2024-10-24 12:39:46,153 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 269 places, 418 transitions, 9057 flow, removed 22 selfloop flow, removed 10 redundant places. [2024-10-24 12:39:46,159 INFO L231 Difference]: Finished difference. Result has 271 places, 374 transitions, 7930 flow [2024-10-24 12:39:46,160 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=7716, PETRI_DIFFERENCE_MINUEND_PLACES=256, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=374, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=76, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=297, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=7930, PETRI_PLACES=271, PETRI_TRANSITIONS=374} [2024-10-24 12:39:46,160 INFO L277 CegarLoopForPetriNet]: 21 programPoint places, 250 predicate places. [2024-10-24 12:39:46,160 INFO L471 AbstractCegarLoop]: Abstraction has has 271 places, 374 transitions, 7930 flow [2024-10-24 12:39:46,160 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 5.0) internal successors, (65), 13 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 12:39:46,160 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-24 12:39:46,160 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-24 12:39:46,178 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Ended with exit code 0 [2024-10-24 12:39:46,361 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2024-10-24 12:39:46,361 INFO L396 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-24 12:39:46,362 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 12:39:46,362 INFO L85 PathProgramCache]: Analyzing trace with hash -1564775838, now seen corresponding path program 13 times [2024-10-24 12:39:46,362 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 12:39:46,362 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [109565556] [2024-10-24 12:39:46,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 12:39:46,362 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 12:39:46,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 12:39:46,474 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-10-24 12:39:46,474 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 12:39:46,474 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [109565556] [2024-10-24 12:39:46,475 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [109565556] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-24 12:39:46,475 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [561626976] [2024-10-24 12:39:46,475 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-10-24 12:39:46,475 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-24 12:39:46,475 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-24 12:39:46,477 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-24 12:39:46,480 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2024-10-24 12:39:46,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 12:39:46,578 INFO L255 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 11 conjuncts are in the unsatisfiable core [2024-10-24 12:39:46,578 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-24 12:39:46,605 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-10-24 12:39:46,606 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-24 12:39:46,697 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-10-24 12:39:46,698 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [561626976] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-24 12:39:46,698 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-24 12:39:46,698 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 7] total 12 [2024-10-24 12:39:46,698 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1433185985] [2024-10-24 12:39:46,698 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-24 12:39:46,699 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-10-24 12:39:46,699 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-24 12:39:46,699 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-10-24 12:39:46,699 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2024-10-24 12:39:46,700 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 20 [2024-10-24 12:39:46,700 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 271 places, 374 transitions, 7930 flow. Second operand has 12 states, 12 states have (on average 5.083333333333333) internal successors, (61), 12 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 12:39:46,700 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-24 12:39:46,700 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 20 [2024-10-24 12:39:46,700 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-24 12:39:50,819 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 [] [2024-10-24 12:39:54,843 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 [] [2024-10-24 12:39:55,208 INFO L124 PetriNetUnfolderBase]: 956/1938 cut-off events. [2024-10-24 12:39:55,208 INFO L125 PetriNetUnfolderBase]: For 38785/38785 co-relation queries the response was YES. [2024-10-24 12:39:55,218 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17362 conditions, 1938 events. 956/1938 cut-off events. For 38785/38785 co-relation queries the response was YES. Maximal size of possible extension queue 152. Compared 12472 event pairs, 210 based on Foata normal form. 2/1939 useless extension candidates. Maximal degree in co-relation 17260. Up to 1001 conditions per place. [2024-10-24 12:39:55,225 INFO L140 encePairwiseOnDemand]: 14/20 looper letters, 318 selfloop transitions, 71 changer transitions 5/395 dead transitions. [2024-10-24 12:39:55,225 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 277 places, 395 transitions, 8939 flow [2024-10-24 12:39:55,226 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-10-24 12:39:55,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-10-24 12:39:55,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 70 transitions. [2024-10-24 12:39:55,226 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.3888888888888889 [2024-10-24 12:39:55,226 INFO L175 Difference]: Start difference. First operand has 271 places, 374 transitions, 7930 flow. Second operand 9 states and 70 transitions. [2024-10-24 12:39:55,227 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 277 places, 395 transitions, 8939 flow [2024-10-24 12:39:55,406 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 264 places, 395 transitions, 8758 flow, removed 19 selfloop flow, removed 13 redundant places. [2024-10-24 12:39:55,412 INFO L231 Difference]: Finished difference. Result has 264 places, 370 transitions, 7789 flow [2024-10-24 12:39:55,412 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=7735, PETRI_DIFFERENCE_MINUEND_PLACES=256, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=373, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=71, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=302, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7789, PETRI_PLACES=264, PETRI_TRANSITIONS=370} [2024-10-24 12:39:55,413 INFO L277 CegarLoopForPetriNet]: 21 programPoint places, 243 predicate places. [2024-10-24 12:39:55,413 INFO L471 AbstractCegarLoop]: Abstraction has has 264 places, 370 transitions, 7789 flow [2024-10-24 12:39:55,413 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 5.083333333333333) internal successors, (61), 12 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 12:39:55,414 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-24 12:39:55,414 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-24 12:39:55,426 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2024-10-24 12:39:55,614 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2024-10-24 12:39:55,614 INFO L396 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-24 12:39:55,615 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 12:39:55,615 INFO L85 PathProgramCache]: Analyzing trace with hash 1576779404, now seen corresponding path program 14 times [2024-10-24 12:39:55,615 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 12:39:55,615 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [147602255] [2024-10-24 12:39:55,615 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 12:39:55,615 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 12:39:55,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 12:39:55,759 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-10-24 12:39:55,759 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 12:39:55,759 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [147602255] [2024-10-24 12:39:55,760 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [147602255] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-24 12:39:55,761 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1922464164] [2024-10-24 12:39:55,761 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-24 12:39:55,761 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-24 12:39:55,761 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-24 12:39:55,763 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-24 12:39:55,764 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2024-10-24 12:39:55,863 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-24 12:39:55,863 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-24 12:39:55,867 INFO L255 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-10-24 12:39:55,868 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-24 12:39:55,913 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-10-24 12:39:55,914 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-24 12:39:56,006 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-10-24 12:39:56,006 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1922464164] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-24 12:39:56,006 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-24 12:39:56,006 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 13 [2024-10-24 12:39:56,006 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1682363481] [2024-10-24 12:39:56,006 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-24 12:39:56,007 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-10-24 12:39:56,007 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-24 12:39:56,007 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-10-24 12:39:56,007 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2024-10-24 12:39:56,007 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 20 [2024-10-24 12:39:56,007 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 264 places, 370 transitions, 7789 flow. Second operand has 13 states, 13 states have (on average 5.153846153846154) internal successors, (67), 13 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 12:39:56,007 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-24 12:39:56,008 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 20 [2024-10-24 12:39:56,008 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-24 12:39:56,610 INFO L124 PetriNetUnfolderBase]: 956/1923 cut-off events. [2024-10-24 12:39:56,611 INFO L125 PetriNetUnfolderBase]: For 40196/40196 co-relation queries the response was YES. [2024-10-24 12:39:56,620 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17279 conditions, 1923 events. 956/1923 cut-off events. For 40196/40196 co-relation queries the response was YES. Maximal size of possible extension queue 151. Compared 12218 event pairs, 359 based on Foata normal form. 10/1932 useless extension candidates. Maximal degree in co-relation 17181. Up to 1749 conditions per place. [2024-10-24 12:39:56,627 INFO L140 encePairwiseOnDemand]: 14/20 looper letters, 340 selfloop transitions, 49 changer transitions 0/390 dead transitions. [2024-10-24 12:39:56,627 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 265 places, 390 transitions, 8721 flow [2024-10-24 12:39:56,628 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-10-24 12:39:56,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-10-24 12:39:56,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 84 transitions. [2024-10-24 12:39:56,628 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.42 [2024-10-24 12:39:56,628 INFO L175 Difference]: Start difference. First operand has 264 places, 370 transitions, 7789 flow. Second operand 10 states and 84 transitions. [2024-10-24 12:39:56,628 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 265 places, 390 transitions, 8721 flow [2024-10-24 12:39:56,828 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 256 places, 390 transitions, 8391 flow, removed 48 selfloop flow, removed 9 redundant places. [2024-10-24 12:39:56,834 INFO L231 Difference]: Finished difference. Result has 258 places, 371 transitions, 7603 flow [2024-10-24 12:39:56,834 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=7418, PETRI_DIFFERENCE_MINUEND_PLACES=247, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=367, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=320, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=7603, PETRI_PLACES=258, PETRI_TRANSITIONS=371} [2024-10-24 12:39:56,835 INFO L277 CegarLoopForPetriNet]: 21 programPoint places, 237 predicate places. [2024-10-24 12:39:56,835 INFO L471 AbstractCegarLoop]: Abstraction has has 258 places, 371 transitions, 7603 flow [2024-10-24 12:39:56,835 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 5.153846153846154) internal successors, (67), 13 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 12:39:56,835 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-24 12:39:56,835 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-24 12:39:56,848 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2024-10-24 12:39:57,035 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-24 12:39:57,036 INFO L396 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-24 12:39:57,036 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 12:39:57,036 INFO L85 PathProgramCache]: Analyzing trace with hash 1524411147, now seen corresponding path program 2 times [2024-10-24 12:39:57,036 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 12:39:57,037 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [133784596] [2024-10-24 12:39:57,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 12:39:57,037 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 12:39:57,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 12:39:57,220 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-10-24 12:39:57,220 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 12:39:57,220 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [133784596] [2024-10-24 12:39:57,220 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [133784596] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-24 12:39:57,220 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1743401408] [2024-10-24 12:39:57,220 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-24 12:39:57,221 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-24 12:39:57,221 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-24 12:39:57,222 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-24 12:39:57,223 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2024-10-24 12:39:57,305 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-24 12:39:57,305 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-24 12:39:57,306 INFO L255 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-10-24 12:39:57,307 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-24 12:39:57,396 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-10-24 12:39:57,396 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-24 12:39:57,610 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-10-24 12:39:57,611 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1743401408] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-24 12:39:57,611 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-24 12:39:57,611 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 8] total 16 [2024-10-24 12:39:57,611 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [633271670] [2024-10-24 12:39:57,611 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-24 12:39:57,611 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-10-24 12:39:57,612 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-24 12:39:57,612 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-10-24 12:39:57,613 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2024-10-24 12:39:57,613 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 20 [2024-10-24 12:39:57,613 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 258 places, 371 transitions, 7603 flow. Second operand has 16 states, 16 states have (on average 5.0625) internal successors, (81), 16 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 12:39:57,613 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-24 12:39:57,613 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 20 [2024-10-24 12:39:57,613 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-24 12:40:02,494 INFO L124 PetriNetUnfolderBase]: 1756/3684 cut-off events. [2024-10-24 12:40:02,494 INFO L125 PetriNetUnfolderBase]: For 76355/76355 co-relation queries the response was YES. [2024-10-24 12:40:02,512 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31491 conditions, 3684 events. 1756/3684 cut-off events. For 76355/76355 co-relation queries the response was YES. Maximal size of possible extension queue 271. Compared 27943 event pairs, 161 based on Foata normal form. 74/3757 useless extension candidates. Maximal degree in co-relation 31395. Up to 953 conditions per place. [2024-10-24 12:40:02,527 INFO L140 encePairwiseOnDemand]: 14/20 looper letters, 387 selfloop transitions, 339 changer transitions 1/728 dead transitions. [2024-10-24 12:40:02,527 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 303 places, 728 transitions, 14846 flow [2024-10-24 12:40:02,528 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2024-10-24 12:40:02,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2024-10-24 12:40:02,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 410 transitions. [2024-10-24 12:40:02,529 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.44565217391304346 [2024-10-24 12:40:02,529 INFO L175 Difference]: Start difference. First operand has 258 places, 371 transitions, 7603 flow. Second operand 46 states and 410 transitions. [2024-10-24 12:40:02,529 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 303 places, 728 transitions, 14846 flow [2024-10-24 12:40:02,807 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 299 places, 728 transitions, 14744 flow, removed 15 selfloop flow, removed 4 redundant places. [2024-10-24 12:40:02,817 INFO L231 Difference]: Finished difference. Result has 323 places, 550 transitions, 12840 flow [2024-10-24 12:40:02,818 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=7512, PETRI_DIFFERENCE_MINUEND_PLACES=254, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=370, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=199, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=151, PETRI_DIFFERENCE_SUBTRAHEND_STATES=46, PETRI_FLOW=12840, PETRI_PLACES=323, PETRI_TRANSITIONS=550} [2024-10-24 12:40:02,818 INFO L277 CegarLoopForPetriNet]: 21 programPoint places, 302 predicate places. [2024-10-24 12:40:02,818 INFO L471 AbstractCegarLoop]: Abstraction has has 323 places, 550 transitions, 12840 flow [2024-10-24 12:40:02,818 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 5.0625) internal successors, (81), 16 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 12:40:02,819 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-24 12:40:02,819 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-24 12:40:02,835 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2024-10-24 12:40:03,019 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-24 12:40:03,019 INFO L396 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-24 12:40:03,020 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 12:40:03,020 INFO L85 PathProgramCache]: Analyzing trace with hash -1708652226, now seen corresponding path program 3 times [2024-10-24 12:40:03,020 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 12:40:03,020 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [615365055] [2024-10-24 12:40:03,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 12:40:03,020 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 12:40:03,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 12:40:03,988 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 12:40:03,989 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 12:40:03,989 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [615365055] [2024-10-24 12:40:03,989 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [615365055] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-24 12:40:03,989 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2068802443] [2024-10-24 12:40:03,989 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-10-24 12:40:03,989 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-24 12:40:03,989 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-24 12:40:03,992 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-24 12:40:03,993 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2024-10-24 12:40:04,064 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-10-24 12:40:04,064 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-24 12:40:04,065 INFO L255 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 33 conjuncts are in the unsatisfiable core [2024-10-24 12:40:04,066 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-24 12:40:04,307 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-24 12:40:04,307 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 20 [2024-10-24 12:40:04,310 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-24 12:40:04,310 INFO L311 TraceCheckSpWp]: Computing backward predicates...