./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/parallel-misc-1.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 61a67961 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/parallel-misc-1.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 faddac23864cc4e42f962ac43a8d0f59593853dbb1d55e3baabe0c76b2187dd4 --- Real Ultimate output --- This is Ultimate 0.2.5-wip.fs.cvc5-61a6796-m [2024-10-14 14:36:53,002 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-10-14 14:36:53,073 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-10-14 14:36:53,076 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-10-14 14:36:53,078 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-10-14 14:36:53,096 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-10-14 14:36:53,096 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-10-14 14:36:53,097 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-10-14 14:36:53,097 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-10-14 14:36:53,097 INFO L153 SettingsManager]: * Use memory slicer=true [2024-10-14 14:36:53,098 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-10-14 14:36:53,098 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-10-14 14:36:53,098 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-10-14 14:36:53,099 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-10-14 14:36:53,099 INFO L153 SettingsManager]: * Use SBE=true [2024-10-14 14:36:53,099 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-10-14 14:36:53,100 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-10-14 14:36:53,100 INFO L153 SettingsManager]: * sizeof long=4 [2024-10-14 14:36:53,100 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-10-14 14:36:53,100 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-10-14 14:36:53,101 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-10-14 14:36:53,101 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-10-14 14:36:53,101 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-10-14 14:36:53,102 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-10-14 14:36:53,102 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-10-14 14:36:53,102 INFO L153 SettingsManager]: * sizeof long double=12 [2024-10-14 14:36:53,103 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-10-14 14:36:53,103 INFO L153 SettingsManager]: * Use constant arrays=true [2024-10-14 14:36:53,103 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-10-14 14:36:53,103 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-10-14 14:36:53,104 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-10-14 14:36:53,104 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-10-14 14:36:53,104 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-14 14:36:53,104 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-10-14 14:36:53,105 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-10-14 14:36:53,105 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-10-14 14:36:53,105 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-10-14 14:36:53,105 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-10-14 14:36:53,106 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-10-14 14:36:53,106 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-10-14 14:36:53,106 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-10-14 14:36:53,107 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-10-14 14:36:53,107 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> faddac23864cc4e42f962ac43a8d0f59593853dbb1d55e3baabe0c76b2187dd4 [2024-10-14 14:36:53,328 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-10-14 14:36:53,349 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-10-14 14:36:53,352 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-10-14 14:36:53,353 INFO L270 PluginConnector]: Initializing CDTParser... [2024-10-14 14:36:53,354 INFO L274 PluginConnector]: CDTParser initialized [2024-10-14 14:36:53,355 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/parallel-misc-1.wvr.c [2024-10-14 14:36:54,711 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-10-14 14:36:54,882 INFO L384 CDTParser]: Found 1 translation units. [2024-10-14 14:36:54,882 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/parallel-misc-1.wvr.c [2024-10-14 14:36:54,888 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/93501a595/02013a86e1974b10974570d109b0e0f4/FLAG29512650a [2024-10-14 14:36:54,899 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/93501a595/02013a86e1974b10974570d109b0e0f4 [2024-10-14 14:36:54,901 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-10-14 14:36:54,902 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-10-14 14:36:54,903 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-10-14 14:36:54,903 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-10-14 14:36:54,907 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-10-14 14:36:54,907 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 02:36:54" (1/1) ... [2024-10-14 14:36:54,908 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7de18baf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 02:36:54, skipping insertion in model container [2024-10-14 14:36:54,908 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 02:36:54" (1/1) ... [2024-10-14 14:36:54,931 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-10-14 14:36:55,074 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/parallel-misc-1.wvr.c[2781,2794] [2024-10-14 14:36:55,082 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-14 14:36:55,088 INFO L200 MainTranslator]: Completed pre-run [2024-10-14 14:36:55,111 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/parallel-misc-1.wvr.c[2781,2794] [2024-10-14 14:36:55,114 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-14 14:36:55,153 INFO L204 MainTranslator]: Completed translation [2024-10-14 14:36:55,156 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 02:36:55 WrapperNode [2024-10-14 14:36:55,157 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-10-14 14:36:55,158 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-10-14 14:36:55,158 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-10-14 14:36:55,159 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-10-14 14:36:55,167 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 02:36:55" (1/1) ... [2024-10-14 14:36:55,179 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 02:36:55" (1/1) ... [2024-10-14 14:36:55,217 INFO L138 Inliner]: procedures = 22, calls = 31, calls flagged for inlining = 17, calls inlined = 31, statements flattened = 277 [2024-10-14 14:36:55,217 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-10-14 14:36:55,218 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-10-14 14:36:55,218 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-10-14 14:36:55,218 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-10-14 14:36:55,230 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 02:36:55" (1/1) ... [2024-10-14 14:36:55,230 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 02:36:55" (1/1) ... [2024-10-14 14:36:55,235 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 02:36:55" (1/1) ... [2024-10-14 14:36:55,256 INFO L175 MemorySlicer]: Split 9 memory accesses to 2 slices as follows [2, 7]. 78 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]. [2024-10-14 14:36:55,259 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 02:36:55" (1/1) ... [2024-10-14 14:36:55,259 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 02:36:55" (1/1) ... [2024-10-14 14:36:55,269 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 02:36:55" (1/1) ... [2024-10-14 14:36:55,275 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 02:36:55" (1/1) ... [2024-10-14 14:36:55,276 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 02:36:55" (1/1) ... [2024-10-14 14:36:55,277 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 02:36:55" (1/1) ... [2024-10-14 14:36:55,283 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-10-14 14:36:55,284 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-10-14 14:36:55,284 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-10-14 14:36:55,284 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-10-14 14:36:55,285 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 02:36:55" (1/1) ... [2024-10-14 14:36:55,292 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-14 14:36:55,300 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-14 14:36:55,312 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) [2024-10-14 14:36:55,313 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 [2024-10-14 14:36:55,358 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-10-14 14:36:55,358 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2024-10-14 14:36:55,359 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2024-10-14 14:36:55,359 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2024-10-14 14:36:55,359 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2024-10-14 14:36:55,360 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-10-14 14:36:55,360 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-10-14 14:36:55,362 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-10-14 14:36:55,362 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-10-14 14:36:55,362 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-10-14 14:36:55,362 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-10-14 14:36:55,362 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-10-14 14:36:55,362 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-10-14 14:36:55,362 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-10-14 14:36:55,364 WARN L207 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2024-10-14 14:36:55,463 INFO L238 CfgBuilder]: Building ICFG [2024-10-14 14:36:55,465 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-10-14 14:36:55,950 INFO L283 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2024-10-14 14:36:55,952 INFO L287 CfgBuilder]: Performing block encoding [2024-10-14 14:36:56,283 INFO L309 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-10-14 14:36:56,287 INFO L314 CfgBuilder]: Removed 3 assume(true) statements. [2024-10-14 14:36:56,287 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 02:36:56 BoogieIcfgContainer [2024-10-14 14:36:56,287 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-10-14 14:36:56,289 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-10-14 14:36:56,289 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-10-14 14:36:56,291 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-10-14 14:36:56,295 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.10 02:36:54" (1/3) ... [2024-10-14 14:36:56,296 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@381657f2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 02:36:56, skipping insertion in model container [2024-10-14 14:36:56,296 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 02:36:55" (2/3) ... [2024-10-14 14:36:56,296 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@381657f2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 02:36:56, skipping insertion in model container [2024-10-14 14:36:56,296 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 02:36:56" (3/3) ... [2024-10-14 14:36:56,297 INFO L112 eAbstractionObserver]: Analyzing ICFG parallel-misc-1.wvr.c [2024-10-14 14:36:56,310 INFO L209 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-10-14 14:36:56,311 INFO L149 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-10-14 14:36:56,311 INFO L484 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-10-14 14:36:56,340 INFO L143 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2024-10-14 14:36:56,369 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 24 places, 20 transitions, 54 flow [2024-10-14 14:36:56,391 INFO L124 PetriNetUnfolderBase]: 3/18 cut-off events. [2024-10-14 14:36:56,391 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-10-14 14:36:56,393 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. [2024-10-14 14:36:56,393 INFO L82 GeneralOperation]: Start removeDead. Operand has 24 places, 20 transitions, 54 flow [2024-10-14 14:36:56,396 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 21 places, 17 transitions, 46 flow [2024-10-14 14:36:56,402 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-10-14 14:36:56,409 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;@f4c557f, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-10-14 14:36:56,409 INFO L334 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2024-10-14 14:36:56,450 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-10-14 14:36:56,453 INFO L124 PetriNetUnfolderBase]: 3/16 cut-off events. [2024-10-14 14:36:56,454 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-10-14 14:36:56,454 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-14 14:36:56,454 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-14 14:36:56,455 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-14 14:36:56,461 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 14:36:56,461 INFO L85 PathProgramCache]: Analyzing trace with hash 21008040, now seen corresponding path program 1 times [2024-10-14 14:36:56,473 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 14:36:56,477 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1869386192] [2024-10-14 14:36:56,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 14:36:56,478 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 14:36:56,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 14:36:57,085 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-14 14:36:57,087 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 14:36:57,088 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1869386192] [2024-10-14 14:36:57,088 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1869386192] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-14 14:36:57,088 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-14 14:36:57,088 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-10-14 14:36:57,090 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1774136121] [2024-10-14 14:36:57,090 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-14 14:36:57,096 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-10-14 14:36:57,099 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 14:36:57,120 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-10-14 14:36:57,120 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-10-14 14:36:57,121 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 20 [2024-10-14 14:36:57,123 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 21 places, 17 transitions, 46 flow. Second operand has 5 states, 5 states have (on average 7.2) internal successors, (36), 5 states have internal predecessors, (36), 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) [2024-10-14 14:36:57,123 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-14 14:36:57,123 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 20 [2024-10-14 14:36:57,124 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-14 14:36:57,242 INFO L124 PetriNetUnfolderBase]: 93/152 cut-off events. [2024-10-14 14:36:57,242 INFO L125 PetriNetUnfolderBase]: For 17/17 co-relation queries the response was YES. [2024-10-14 14:36:57,244 INFO L83 FinitePrefix]: Finished finitePrefix Result has 324 conditions, 152 events. 93/152 cut-off events. For 17/17 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 429 event pairs, 8 based on Foata normal form. 1/95 useless extension candidates. Maximal degree in co-relation 267. Up to 102 conditions per place. [2024-10-14 14:36:57,247 INFO L140 encePairwiseOnDemand]: 14/20 looper letters, 25 selfloop transitions, 10 changer transitions 1/39 dead transitions. [2024-10-14 14:36:57,247 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 25 places, 39 transitions, 177 flow [2024-10-14 14:36:57,248 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-10-14 14:36:57,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-10-14 14:36:57,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 62 transitions. [2024-10-14 14:36:57,256 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.62 [2024-10-14 14:36:57,257 INFO L175 Difference]: Start difference. First operand has 21 places, 17 transitions, 46 flow. Second operand 5 states and 62 transitions. [2024-10-14 14:36:57,258 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 25 places, 39 transitions, 177 flow [2024-10-14 14:36:57,259 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 21 places, 39 transitions, 159 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-10-14 14:36:57,261 INFO L231 Difference]: Finished difference. Result has 24 places, 26 transitions, 101 flow [2024-10-14 14:36:57,262 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=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=12, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=101, PETRI_PLACES=24, PETRI_TRANSITIONS=26} [2024-10-14 14:36:57,266 INFO L277 CegarLoopForPetriNet]: 21 programPoint places, 3 predicate places. [2024-10-14 14:36:57,266 INFO L471 AbstractCegarLoop]: Abstraction has has 24 places, 26 transitions, 101 flow [2024-10-14 14:36:57,267 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 7.2) internal successors, (36), 5 states have internal predecessors, (36), 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) [2024-10-14 14:36:57,267 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-14 14:36:57,267 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-14 14:36:57,267 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-10-14 14:36:57,268 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-14 14:36:57,268 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 14:36:57,268 INFO L85 PathProgramCache]: Analyzing trace with hash -1326643493, now seen corresponding path program 1 times [2024-10-14 14:36:57,268 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 14:36:57,268 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [871498106] [2024-10-14 14:36:57,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 14:36:57,269 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 14:36:57,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 14:36:57,390 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-14 14:36:57,390 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 14:36:57,390 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [871498106] [2024-10-14 14:36:57,390 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [871498106] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-14 14:36:57,390 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-14 14:36:57,390 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-10-14 14:36:57,391 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [845640356] [2024-10-14 14:36:57,391 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-14 14:36:57,392 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-10-14 14:36:57,392 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 14:36:57,392 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-10-14 14:36:57,393 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-10-14 14:36:57,393 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 20 [2024-10-14 14:36:57,393 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 24 places, 26 transitions, 101 flow. Second operand has 4 states, 4 states have (on average 8.0) internal successors, (32), 4 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) [2024-10-14 14:36:57,393 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-14 14:36:57,393 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 20 [2024-10-14 14:36:57,393 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-14 14:36:57,488 INFO L124 PetriNetUnfolderBase]: 121/208 cut-off events. [2024-10-14 14:36:57,488 INFO L125 PetriNetUnfolderBase]: For 166/166 co-relation queries the response was YES. [2024-10-14 14:36:57,493 INFO L83 FinitePrefix]: Finished finitePrefix Result has 652 conditions, 208 events. 121/208 cut-off events. For 166/166 co-relation queries the response was YES. Maximal size of possible extension queue 23. Compared 709 event pairs, 41 based on Foata normal form. 8/192 useless extension candidates. Maximal degree in co-relation 368. Up to 107 conditions per place. [2024-10-14 14:36:57,494 INFO L140 encePairwiseOnDemand]: 15/20 looper letters, 31 selfloop transitions, 6 changer transitions 0/40 dead transitions. [2024-10-14 14:36:57,494 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 27 places, 40 transitions, 230 flow [2024-10-14 14:36:57,494 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-10-14 14:36:57,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-10-14 14:36:57,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 45 transitions. [2024-10-14 14:36:57,495 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5625 [2024-10-14 14:36:57,495 INFO L175 Difference]: Start difference. First operand has 24 places, 26 transitions, 101 flow. Second operand 4 states and 45 transitions. [2024-10-14 14:36:57,495 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 27 places, 40 transitions, 230 flow [2024-10-14 14:36:57,496 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 27 places, 40 transitions, 224 flow, removed 3 selfloop flow, removed 0 redundant places. [2024-10-14 14:36:57,497 INFO L231 Difference]: Finished difference. Result has 30 places, 30 transitions, 153 flow [2024-10-14 14:36:57,497 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=97, PETRI_DIFFERENCE_MINUEND_PLACES=24, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=26, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=20, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=153, PETRI_PLACES=30, PETRI_TRANSITIONS=30} [2024-10-14 14:36:57,498 INFO L277 CegarLoopForPetriNet]: 21 programPoint places, 9 predicate places. [2024-10-14 14:36:57,498 INFO L471 AbstractCegarLoop]: Abstraction has has 30 places, 30 transitions, 153 flow [2024-10-14 14:36:57,498 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 8.0) internal successors, (32), 4 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) [2024-10-14 14:36:57,498 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-14 14:36:57,498 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-14 14:36:57,498 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-10-14 14:36:57,498 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-14 14:36:57,498 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 14:36:57,499 INFO L85 PathProgramCache]: Analyzing trace with hash 2063276826, now seen corresponding path program 1 times [2024-10-14 14:36:57,499 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 14:36:57,499 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1938492437] [2024-10-14 14:36:57,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 14:36:57,499 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 14:36:57,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 14:36:57,587 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-14 14:36:57,587 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 14:36:57,587 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1938492437] [2024-10-14 14:36:57,587 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1938492437] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-14 14:36:57,587 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-14 14:36:57,588 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-10-14 14:36:57,588 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [150715463] [2024-10-14 14:36:57,588 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-14 14:36:57,588 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-10-14 14:36:57,588 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 14:36:57,589 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-10-14 14:36:57,589 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-10-14 14:36:57,589 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 20 [2024-10-14 14:36:57,589 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 30 places, 30 transitions, 153 flow. Second operand has 4 states, 4 states have (on average 8.0) internal successors, (32), 4 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) [2024-10-14 14:36:57,589 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-14 14:36:57,590 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 20 [2024-10-14 14:36:57,590 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-14 14:36:57,644 INFO L124 PetriNetUnfolderBase]: 96/171 cut-off events. [2024-10-14 14:36:57,645 INFO L125 PetriNetUnfolderBase]: For 310/310 co-relation queries the response was YES. [2024-10-14 14:36:57,645 INFO L83 FinitePrefix]: Finished finitePrefix Result has 599 conditions, 171 events. 96/171 cut-off events. For 310/310 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 562 event pairs, 26 based on Foata normal form. 5/169 useless extension candidates. Maximal degree in co-relation 497. Up to 88 conditions per place. [2024-10-14 14:36:57,646 INFO L140 encePairwiseOnDemand]: 15/20 looper letters, 28 selfloop transitions, 4 changer transitions 4/39 dead transitions. [2024-10-14 14:36:57,646 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 33 places, 39 transitions, 268 flow [2024-10-14 14:36:57,647 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-10-14 14:36:57,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-10-14 14:36:57,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 44 transitions. [2024-10-14 14:36:57,647 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.55 [2024-10-14 14:36:57,647 INFO L175 Difference]: Start difference. First operand has 30 places, 30 transitions, 153 flow. Second operand 4 states and 44 transitions. [2024-10-14 14:36:57,648 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 33 places, 39 transitions, 268 flow [2024-10-14 14:36:57,649 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 33 places, 39 transitions, 264 flow, removed 2 selfloop flow, removed 0 redundant places. [2024-10-14 14:36:57,650 INFO L231 Difference]: Finished difference. Result has 34 places, 27 transitions, 139 flow [2024-10-14 14:36:57,650 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=142, PETRI_DIFFERENCE_MINUEND_PLACES=30, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=29, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=139, PETRI_PLACES=34, PETRI_TRANSITIONS=27} [2024-10-14 14:36:57,650 INFO L277 CegarLoopForPetriNet]: 21 programPoint places, 13 predicate places. [2024-10-14 14:36:57,651 INFO L471 AbstractCegarLoop]: Abstraction has has 34 places, 27 transitions, 139 flow [2024-10-14 14:36:57,651 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 8.0) internal successors, (32), 4 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) [2024-10-14 14:36:57,651 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-14 14:36:57,651 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-14 14:36:57,651 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-10-14 14:36:57,651 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-14 14:36:57,652 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 14:36:57,652 INFO L85 PathProgramCache]: Analyzing trace with hash -1339064740, now seen corresponding path program 1 times [2024-10-14 14:36:57,652 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 14:36:57,652 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1104016666] [2024-10-14 14:36:57,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 14:36:57,652 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 14:36:57,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 14:36:57,721 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-14 14:36:57,721 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 14:36:57,721 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1104016666] [2024-10-14 14:36:57,722 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1104016666] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-14 14:36:57,722 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1879811270] [2024-10-14 14:36:57,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 14:36:57,722 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-14 14:36:57,722 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-14 14:36:57,724 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) [2024-10-14 14:36:57,725 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-10-14 14:36:57,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 14:36:57,796 INFO L255 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-10-14 14:36:57,800 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-14 14:36:57,912 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-14 14:36:57,913 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-14 14:36:57,957 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-14 14:36:57,958 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1879811270] provided 1 perfect and 1 imperfect interpolant sequences [2024-10-14 14:36:57,958 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-10-14 14:36:57,958 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4, 4] total 7 [2024-10-14 14:36:57,958 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1292011528] [2024-10-14 14:36:57,958 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-14 14:36:57,959 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-10-14 14:36:57,959 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 14:36:57,960 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-10-14 14:36:57,960 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-10-14 14:36:57,961 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 20 [2024-10-14 14:36:57,961 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 34 places, 27 transitions, 139 flow. Second operand has 5 states, 5 states have (on average 7.6) internal successors, (38), 5 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 14:36:57,962 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-14 14:36:57,962 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 20 [2024-10-14 14:36:57,962 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-14 14:36:58,030 INFO L124 PetriNetUnfolderBase]: 76/129 cut-off events. [2024-10-14 14:36:58,030 INFO L125 PetriNetUnfolderBase]: For 310/310 co-relation queries the response was YES. [2024-10-14 14:36:58,031 INFO L83 FinitePrefix]: Finished finitePrefix Result has 479 conditions, 129 events. 76/129 cut-off events. For 310/310 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 339 event pairs, 12 based on Foata normal form. 9/133 useless extension candidates. Maximal degree in co-relation 452. Up to 80 conditions per place. [2024-10-14 14:36:58,032 INFO L140 encePairwiseOnDemand]: 15/20 looper letters, 26 selfloop transitions, 6 changer transitions 0/35 dead transitions. [2024-10-14 14:36:58,032 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 38 places, 35 transitions, 243 flow [2024-10-14 14:36:58,033 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-10-14 14:36:58,033 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-10-14 14:36:58,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 46 transitions. [2024-10-14 14:36:58,034 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.46 [2024-10-14 14:36:58,034 INFO L175 Difference]: Start difference. First operand has 34 places, 27 transitions, 139 flow. Second operand 5 states and 46 transitions. [2024-10-14 14:36:58,035 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 38 places, 35 transitions, 243 flow [2024-10-14 14:36:58,036 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 31 places, 35 transitions, 201 flow, removed 7 selfloop flow, removed 7 redundant places. [2024-10-14 14:36:58,039 INFO L231 Difference]: Finished difference. Result has 32 places, 29 transitions, 138 flow [2024-10-14 14:36:58,039 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=105, PETRI_DIFFERENCE_MINUEND_PLACES=27, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=27, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=138, PETRI_PLACES=32, PETRI_TRANSITIONS=29} [2024-10-14 14:36:58,039 INFO L277 CegarLoopForPetriNet]: 21 programPoint places, 11 predicate places. [2024-10-14 14:36:58,040 INFO L471 AbstractCegarLoop]: Abstraction has has 32 places, 29 transitions, 138 flow [2024-10-14 14:36:58,040 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 7.6) internal successors, (38), 5 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 14:36:58,040 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-14 14:36:58,040 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-14 14:36:58,055 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-10-14 14:36:58,241 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-14 14:36:58,242 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-14 14:36:58,242 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 14:36:58,242 INFO L85 PathProgramCache]: Analyzing trace with hash -94130901, now seen corresponding path program 1 times [2024-10-14 14:36:58,242 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 14:36:58,243 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [73873815] [2024-10-14 14:36:58,243 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 14:36:58,243 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 14:36:58,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 14:36:58,329 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-14 14:36:58,329 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 14:36:58,329 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [73873815] [2024-10-14 14:36:58,329 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [73873815] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-14 14:36:58,329 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1694893222] [2024-10-14 14:36:58,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 14:36:58,330 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-14 14:36:58,330 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-14 14:36:58,331 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) [2024-10-14 14:36:58,333 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-10-14 14:36:58,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 14:36:58,397 INFO L255 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-10-14 14:36:58,398 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-14 14:36:58,433 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-14 14:36:58,433 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-14 14:36:58,461 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-14 14:36:58,461 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1694893222] provided 1 perfect and 1 imperfect interpolant sequences [2024-10-14 14:36:58,461 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-10-14 14:36:58,461 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4, 4] total 7 [2024-10-14 14:36:58,461 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2040806095] [2024-10-14 14:36:58,461 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-14 14:36:58,462 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-10-14 14:36:58,462 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 14:36:58,462 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-10-14 14:36:58,462 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-10-14 14:36:58,463 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 20 [2024-10-14 14:36:58,463 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 32 places, 29 transitions, 138 flow. Second operand has 5 states, 5 states have (on average 7.6) internal successors, (38), 5 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 14:36:58,463 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-14 14:36:58,463 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 20 [2024-10-14 14:36:58,463 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-14 14:36:58,507 INFO L124 PetriNetUnfolderBase]: 59/102 cut-off events. [2024-10-14 14:36:58,507 INFO L125 PetriNetUnfolderBase]: For 76/76 co-relation queries the response was YES. [2024-10-14 14:36:58,508 INFO L83 FinitePrefix]: Finished finitePrefix Result has 374 conditions, 102 events. 59/102 cut-off events. For 76/76 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 213 event pairs, 5 based on Foata normal form. 9/107 useless extension candidates. Maximal degree in co-relation 351. Up to 80 conditions per place. [2024-10-14 14:36:58,508 INFO L140 encePairwiseOnDemand]: 15/20 looper letters, 26 selfloop transitions, 6 changer transitions 0/35 dead transitions. [2024-10-14 14:36:58,508 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 36 places, 35 transitions, 228 flow [2024-10-14 14:36:58,508 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-10-14 14:36:58,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-10-14 14:36:58,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 47 transitions. [2024-10-14 14:36:58,509 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.47 [2024-10-14 14:36:58,509 INFO L175 Difference]: Start difference. First operand has 32 places, 29 transitions, 138 flow. Second operand 5 states and 47 transitions. [2024-10-14 14:36:58,509 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 36 places, 35 transitions, 228 flow [2024-10-14 14:36:58,511 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 34 places, 35 transitions, 225 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-10-14 14:36:58,514 INFO L231 Difference]: Finished difference. Result has 35 places, 30 transitions, 159 flow [2024-10-14 14:36:58,514 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=135, PETRI_DIFFERENCE_MINUEND_PLACES=30, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=29, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=159, PETRI_PLACES=35, PETRI_TRANSITIONS=30} [2024-10-14 14:36:58,516 INFO L277 CegarLoopForPetriNet]: 21 programPoint places, 14 predicate places. [2024-10-14 14:36:58,516 INFO L471 AbstractCegarLoop]: Abstraction has has 35 places, 30 transitions, 159 flow [2024-10-14 14:36:58,517 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 7.6) internal successors, (38), 5 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 14:36:58,517 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-14 14:36:58,517 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-14 14:36:58,534 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-10-14 14:36:58,717 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-14 14:36:58,718 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-14 14:36:58,719 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 14:36:58,719 INFO L85 PathProgramCache]: Analyzing trace with hash 1914839235, now seen corresponding path program 1 times [2024-10-14 14:36:58,719 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 14:36:58,721 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [907334616] [2024-10-14 14:36:58,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 14:36:58,721 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 14:36:58,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 14:36:59,533 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-14 14:36:59,534 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 14:36:59,534 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [907334616] [2024-10-14 14:36:59,536 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [907334616] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-14 14:36:59,536 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [971012696] [2024-10-14 14:36:59,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 14:36:59,537 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-14 14:36:59,537 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-14 14:36:59,540 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) [2024-10-14 14:36:59,540 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-10-14 14:36:59,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 14:36:59,612 INFO L255 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 24 conjuncts are in the unsatisfiable core [2024-10-14 14:36:59,614 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-14 14:36:59,644 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 [2024-10-14 14:36:59,820 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 69 treesize of output 49 [2024-10-14 14:36:59,849 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-14 14:36:59,850 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-14 14:37:00,555 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-14 14:37:00,556 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [971012696] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-14 14:37:00,556 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-14 14:37:00,556 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 7] total 16 [2024-10-14 14:37:00,556 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2072805047] [2024-10-14 14:37:00,556 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-14 14:37:00,556 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-10-14 14:37:00,556 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 14:37:00,557 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-10-14 14:37:00,559 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=197, Unknown=0, NotChecked=0, Total=240 [2024-10-14 14:37:00,559 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 20 [2024-10-14 14:37:00,559 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 35 places, 30 transitions, 159 flow. Second operand has 16 states, 16 states have (on average 7.25) internal successors, (116), 16 states have internal predecessors, (116), 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) [2024-10-14 14:37:00,559 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-14 14:37:00,559 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 20 [2024-10-14 14:37:00,559 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-14 14:37:00,765 INFO L124 PetriNetUnfolderBase]: 72/129 cut-off events. [2024-10-14 14:37:00,765 INFO L125 PetriNetUnfolderBase]: For 136/136 co-relation queries the response was YES. [2024-10-14 14:37:00,766 INFO L83 FinitePrefix]: Finished finitePrefix Result has 517 conditions, 129 events. 72/129 cut-off events. For 136/136 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 324 event pairs, 0 based on Foata normal form. 1/126 useless extension candidates. Maximal degree in co-relation 491. Up to 87 conditions per place. [2024-10-14 14:37:00,766 INFO L140 encePairwiseOnDemand]: 12/20 looper letters, 31 selfloop transitions, 17 changer transitions 3/54 dead transitions. [2024-10-14 14:37:00,766 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 43 places, 54 transitions, 357 flow [2024-10-14 14:37:00,767 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-10-14 14:37:00,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-10-14 14:37:00,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 88 transitions. [2024-10-14 14:37:00,768 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4888888888888889 [2024-10-14 14:37:00,769 INFO L175 Difference]: Start difference. First operand has 35 places, 30 transitions, 159 flow. Second operand 9 states and 88 transitions. [2024-10-14 14:37:00,769 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 43 places, 54 transitions, 357 flow [2024-10-14 14:37:00,770 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 54 transitions, 354 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-10-14 14:37:00,770 INFO L231 Difference]: Finished difference. Result has 45 places, 38 transitions, 275 flow [2024-10-14 14:37:00,771 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=156, PETRI_DIFFERENCE_MINUEND_PLACES=33, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=30, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=14, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=275, PETRI_PLACES=45, PETRI_TRANSITIONS=38} [2024-10-14 14:37:00,771 INFO L277 CegarLoopForPetriNet]: 21 programPoint places, 24 predicate places. [2024-10-14 14:37:00,771 INFO L471 AbstractCegarLoop]: Abstraction has has 45 places, 38 transitions, 275 flow [2024-10-14 14:37:00,771 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 7.25) internal successors, (116), 16 states have internal predecessors, (116), 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) [2024-10-14 14:37:00,772 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-14 14:37:00,772 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-14 14:37:00,788 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2024-10-14 14:37:00,972 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-14 14:37:00,973 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-14 14:37:00,973 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 14:37:00,973 INFO L85 PathProgramCache]: Analyzing trace with hash -168671343, now seen corresponding path program 2 times [2024-10-14 14:37:00,973 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 14:37:00,973 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1505530869] [2024-10-14 14:37:00,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 14:37:00,973 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 14:37:01,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 14:37:01,495 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-14 14:37:01,496 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 14:37:01,496 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1505530869] [2024-10-14 14:37:01,499 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1505530869] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-14 14:37:01,499 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1925700955] [2024-10-14 14:37:01,499 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-14 14:37:01,499 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-14 14:37:01,499 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-14 14:37:01,501 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) [2024-10-14 14:37:01,507 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-10-14 14:37:01,580 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-14 14:37:01,580 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-14 14:37:01,581 INFO L255 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 27 conjuncts are in the unsatisfiable core [2024-10-14 14:37:01,584 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-14 14:37:01,598 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 [2024-10-14 14:37:01,740 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 69 treesize of output 49 [2024-10-14 14:37:01,799 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-14 14:37:01,799 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-14 14:37:02,594 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-14 14:37:02,594 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1925700955] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-14 14:37:02,594 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-14 14:37:02,595 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 7] total 17 [2024-10-14 14:37:02,595 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [918276388] [2024-10-14 14:37:02,595 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-14 14:37:02,595 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-10-14 14:37:02,596 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 14:37:02,596 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-10-14 14:37:02,596 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=220, Unknown=0, NotChecked=0, Total=272 [2024-10-14 14:37:02,596 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 20 [2024-10-14 14:37:02,597 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 38 transitions, 275 flow. Second operand has 17 states, 17 states have (on average 7.117647058823529) internal successors, (121), 17 states have internal predecessors, (121), 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) [2024-10-14 14:37:02,597 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-14 14:37:02,597 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 20 [2024-10-14 14:37:02,597 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-14 14:37:03,095 INFO L124 PetriNetUnfolderBase]: 104/179 cut-off events. [2024-10-14 14:37:03,095 INFO L125 PetriNetUnfolderBase]: For 379/379 co-relation queries the response was YES. [2024-10-14 14:37:03,096 INFO L83 FinitePrefix]: Finished finitePrefix Result has 890 conditions, 179 events. 104/179 cut-off events. For 379/379 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 502 event pairs, 2 based on Foata normal form. 1/176 useless extension candidates. Maximal degree in co-relation 858. Up to 115 conditions per place. [2024-10-14 14:37:03,097 INFO L140 encePairwiseOnDemand]: 12/20 looper letters, 32 selfloop transitions, 35 changer transitions 5/75 dead transitions. [2024-10-14 14:37:03,097 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 75 transitions, 632 flow [2024-10-14 14:37:03,097 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-10-14 14:37:03,097 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2024-10-14 14:37:03,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 148 transitions. [2024-10-14 14:37:03,099 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4625 [2024-10-14 14:37:03,099 INFO L175 Difference]: Start difference. First operand has 45 places, 38 transitions, 275 flow. Second operand 16 states and 148 transitions. [2024-10-14 14:37:03,099 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 75 transitions, 632 flow [2024-10-14 14:37:03,100 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 75 transitions, 583 flow, removed 15 selfloop flow, removed 4 redundant places. [2024-10-14 14:37:03,101 INFO L231 Difference]: Finished difference. Result has 57 places, 55 transitions, 465 flow [2024-10-14 14:37:03,102 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=237, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=14, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=465, PETRI_PLACES=57, PETRI_TRANSITIONS=55} [2024-10-14 14:37:03,102 INFO L277 CegarLoopForPetriNet]: 21 programPoint places, 36 predicate places. [2024-10-14 14:37:03,102 INFO L471 AbstractCegarLoop]: Abstraction has has 57 places, 55 transitions, 465 flow [2024-10-14 14:37:03,102 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 7.117647058823529) internal successors, (121), 17 states have internal predecessors, (121), 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) [2024-10-14 14:37:03,102 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-14 14:37:03,103 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-14 14:37:03,115 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-10-14 14:37:03,303 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-14 14:37:03,303 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-14 14:37:03,304 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 14:37:03,304 INFO L85 PathProgramCache]: Analyzing trace with hash 1827560039, now seen corresponding path program 3 times [2024-10-14 14:37:03,304 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 14:37:03,304 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1404862225] [2024-10-14 14:37:03,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 14:37:03,305 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 14:37:03,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 14:37:03,965 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-14 14:37:03,965 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 14:37:03,965 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1404862225] [2024-10-14 14:37:03,965 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1404862225] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-14 14:37:03,965 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2138918505] [2024-10-14 14:37:03,965 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-10-14 14:37:03,965 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-14 14:37:03,966 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-14 14:37:03,968 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) [2024-10-14 14:37:03,969 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-10-14 14:37:04,034 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-10-14 14:37:04,034 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-14 14:37:04,035 INFO L255 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 24 conjuncts are in the unsatisfiable core [2024-10-14 14:37:04,037 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-14 14:37:04,212 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 69 treesize of output 49 [2024-10-14 14:37:04,265 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-14 14:37:04,265 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-14 14:37:04,463 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-14 14:37:04,464 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 233 treesize of output 145 [2024-10-14 14:37:04,770 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-14 14:37:04,771 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2138918505] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-14 14:37:04,771 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-14 14:37:04,771 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 18 [2024-10-14 14:37:04,771 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [342766634] [2024-10-14 14:37:04,772 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-14 14:37:04,772 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-10-14 14:37:04,772 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 14:37:04,773 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-10-14 14:37:04,773 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=248, Unknown=0, NotChecked=0, Total=306 [2024-10-14 14:37:04,773 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 20 [2024-10-14 14:37:04,773 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 55 transitions, 465 flow. Second operand has 18 states, 18 states have (on average 7.111111111111111) internal successors, (128), 18 states have internal predecessors, (128), 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) [2024-10-14 14:37:04,773 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-14 14:37:04,774 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 20 [2024-10-14 14:37:04,774 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-14 14:37:05,054 INFO L124 PetriNetUnfolderBase]: 125/216 cut-off events. [2024-10-14 14:37:05,055 INFO L125 PetriNetUnfolderBase]: For 446/446 co-relation queries the response was YES. [2024-10-14 14:37:05,057 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1120 conditions, 216 events. 125/216 cut-off events. For 446/446 co-relation queries the response was YES. Maximal size of possible extension queue 28. Compared 669 event pairs, 0 based on Foata normal form. 1/213 useless extension candidates. Maximal degree in co-relation 1101. Up to 147 conditions per place. [2024-10-14 14:37:05,058 INFO L140 encePairwiseOnDemand]: 12/20 looper letters, 53 selfloop transitions, 26 changer transitions 4/86 dead transitions. [2024-10-14 14:37:05,058 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 86 transitions, 772 flow [2024-10-14 14:37:05,059 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-10-14 14:37:05,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2024-10-14 14:37:05,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 132 transitions. [2024-10-14 14:37:05,060 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4714285714285714 [2024-10-14 14:37:05,061 INFO L175 Difference]: Start difference. First operand has 57 places, 55 transitions, 465 flow. Second operand 14 states and 132 transitions. [2024-10-14 14:37:05,061 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 86 transitions, 772 flow [2024-10-14 14:37:05,063 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 86 transitions, 557 flow, removed 78 selfloop flow, removed 12 redundant places. [2024-10-14 14:37:05,064 INFO L231 Difference]: Finished difference. Result has 61 places, 62 transitions, 399 flow [2024-10-14 14:37:05,064 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=268, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=55, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=399, PETRI_PLACES=61, PETRI_TRANSITIONS=62} [2024-10-14 14:37:05,066 INFO L277 CegarLoopForPetriNet]: 21 programPoint places, 40 predicate places. [2024-10-14 14:37:05,066 INFO L471 AbstractCegarLoop]: Abstraction has has 61 places, 62 transitions, 399 flow [2024-10-14 14:37:05,067 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 7.111111111111111) internal successors, (128), 18 states have internal predecessors, (128), 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) [2024-10-14 14:37:05,067 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-14 14:37:05,067 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-14 14:37:05,082 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-10-14 14:37:05,270 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-14 14:37:05,271 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-14 14:37:05,271 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 14:37:05,271 INFO L85 PathProgramCache]: Analyzing trace with hash -1625165103, now seen corresponding path program 4 times [2024-10-14 14:37:05,271 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 14:37:05,271 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1816549755] [2024-10-14 14:37:05,271 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 14:37:05,271 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 14:37:05,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 14:37:05,810 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-14 14:37:05,811 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 14:37:05,811 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1816549755] [2024-10-14 14:37:05,811 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1816549755] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-14 14:37:05,811 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1857848102] [2024-10-14 14:37:05,811 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-10-14 14:37:05,811 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-14 14:37:05,812 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-14 14:37:05,813 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) [2024-10-14 14:37:05,819 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-10-14 14:37:05,899 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-10-14 14:37:05,899 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-14 14:37:05,900 INFO L255 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 18 conjuncts are in the unsatisfiable core [2024-10-14 14:37:05,902 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-14 14:37:06,031 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 77 treesize of output 49 [2024-10-14 14:37:06,061 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-14 14:37:06,061 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-14 14:37:06,255 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-14 14:37:06,256 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 200 treesize of output 144 [2024-10-14 14:37:06,466 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-14 14:37:06,466 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1857848102] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-14 14:37:06,466 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-14 14:37:06,466 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 16 [2024-10-14 14:37:06,467 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1172097103] [2024-10-14 14:37:06,467 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-14 14:37:06,467 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-10-14 14:37:06,467 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 14:37:06,468 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-10-14 14:37:06,468 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=200, Unknown=0, NotChecked=0, Total=240 [2024-10-14 14:37:06,468 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 20 [2024-10-14 14:37:06,469 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 62 transitions, 399 flow. Second operand has 16 states, 16 states have (on average 7.0625) internal successors, (113), 16 states have internal predecessors, (113), 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) [2024-10-14 14:37:06,469 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-14 14:37:06,469 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 20 [2024-10-14 14:37:06,469 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-14 14:37:06,691 INFO L124 PetriNetUnfolderBase]: 122/213 cut-off events. [2024-10-14 14:37:06,691 INFO L125 PetriNetUnfolderBase]: For 311/311 co-relation queries the response was YES. [2024-10-14 14:37:06,692 INFO L83 FinitePrefix]: Finished finitePrefix Result has 951 conditions, 213 events. 122/213 cut-off events. For 311/311 co-relation queries the response was YES. Maximal size of possible extension queue 28. Compared 664 event pairs, 0 based on Foata normal form. 1/200 useless extension candidates. Maximal degree in co-relation 932. Up to 171 conditions per place. [2024-10-14 14:37:06,693 INFO L140 encePairwiseOnDemand]: 12/20 looper letters, 56 selfloop transitions, 18 changer transitions 3/80 dead transitions. [2024-10-14 14:37:06,693 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 80 transitions, 598 flow [2024-10-14 14:37:06,693 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-10-14 14:37:06,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-10-14 14:37:06,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 103 transitions. [2024-10-14 14:37:06,694 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4681818181818182 [2024-10-14 14:37:06,694 INFO L175 Difference]: Start difference. First operand has 61 places, 62 transitions, 399 flow. Second operand 11 states and 103 transitions. [2024-10-14 14:37:06,694 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 80 transitions, 598 flow [2024-10-14 14:37:06,700 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 62 places, 80 transitions, 538 flow, removed 19 selfloop flow, removed 8 redundant places. [2024-10-14 14:37:06,701 INFO L231 Difference]: Finished difference. Result has 64 places, 63 transitions, 390 flow [2024-10-14 14:37:06,701 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=339, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=62, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=390, PETRI_PLACES=64, PETRI_TRANSITIONS=63} [2024-10-14 14:37:06,701 INFO L277 CegarLoopForPetriNet]: 21 programPoint places, 43 predicate places. [2024-10-14 14:37:06,702 INFO L471 AbstractCegarLoop]: Abstraction has has 64 places, 63 transitions, 390 flow [2024-10-14 14:37:06,702 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 7.0625) internal successors, (113), 16 states have internal predecessors, (113), 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) [2024-10-14 14:37:06,702 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-14 14:37:06,702 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-14 14:37:06,714 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2024-10-14 14:37:06,906 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-14 14:37:06,907 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-14 14:37:06,908 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 14:37:06,908 INFO L85 PathProgramCache]: Analyzing trace with hash 1825793813, now seen corresponding path program 5 times [2024-10-14 14:37:06,908 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 14:37:06,908 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1140497541] [2024-10-14 14:37:06,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 14:37:06,908 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 14:37:06,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 14:37:07,403 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-14 14:37:07,404 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 14:37:07,404 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1140497541] [2024-10-14 14:37:07,404 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1140497541] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-14 14:37:07,404 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1394316724] [2024-10-14 14:37:07,404 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-10-14 14:37:07,404 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-14 14:37:07,404 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-14 14:37:07,408 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) [2024-10-14 14:37:07,412 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-10-14 14:37:07,475 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-14 14:37:07,475 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-14 14:37:07,480 INFO L255 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 29 conjuncts are in the unsatisfiable core [2024-10-14 14:37:07,482 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-14 14:37:07,498 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 [2024-10-14 14:37:07,646 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 77 treesize of output 49 [2024-10-14 14:37:07,693 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-14 14:37:07,693 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-14 14:37:08,287 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-14 14:37:08,288 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1394316724] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-14 14:37:08,288 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-14 14:37:08,288 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 18 [2024-10-14 14:37:08,288 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [746608737] [2024-10-14 14:37:08,288 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-14 14:37:08,288 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-10-14 14:37:08,289 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 14:37:08,289 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-10-14 14:37:08,289 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=255, Unknown=0, NotChecked=0, Total=306 [2024-10-14 14:37:08,290 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 20 [2024-10-14 14:37:08,290 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 63 transitions, 390 flow. Second operand has 18 states, 18 states have (on average 6.944444444444445) internal successors, (125), 18 states have internal predecessors, (125), 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) [2024-10-14 14:37:08,290 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-14 14:37:08,291 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 20 [2024-10-14 14:37:08,291 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-14 14:37:08,773 INFO L124 PetriNetUnfolderBase]: 151/268 cut-off events. [2024-10-14 14:37:08,773 INFO L125 PetriNetUnfolderBase]: For 472/472 co-relation queries the response was YES. [2024-10-14 14:37:08,775 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1193 conditions, 268 events. 151/268 cut-off events. For 472/472 co-relation queries the response was YES. Maximal size of possible extension queue 31. Compared 876 event pairs, 1 based on Foata normal form. 1/257 useless extension candidates. Maximal degree in co-relation 1138. Up to 175 conditions per place. [2024-10-14 14:37:08,776 INFO L140 encePairwiseOnDemand]: 12/20 looper letters, 56 selfloop transitions, 44 changer transitions 5/108 dead transitions. [2024-10-14 14:37:08,776 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 80 places, 108 transitions, 846 flow [2024-10-14 14:37:08,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-10-14 14:37:08,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2024-10-14 14:37:08,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 157 transitions. [2024-10-14 14:37:08,778 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.46176470588235297 [2024-10-14 14:37:08,778 INFO L175 Difference]: Start difference. First operand has 64 places, 63 transitions, 390 flow. Second operand 17 states and 157 transitions. [2024-10-14 14:37:08,778 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 80 places, 108 transitions, 846 flow [2024-10-14 14:37:08,781 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 108 transitions, 790 flow, removed 2 selfloop flow, removed 10 redundant places. [2024-10-14 14:37:08,782 INFO L231 Difference]: Finished difference. Result has 75 places, 82 transitions, 638 flow [2024-10-14 14:37:08,782 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=349, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=63, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=638, PETRI_PLACES=75, PETRI_TRANSITIONS=82} [2024-10-14 14:37:08,783 INFO L277 CegarLoopForPetriNet]: 21 programPoint places, 54 predicate places. [2024-10-14 14:37:08,783 INFO L471 AbstractCegarLoop]: Abstraction has has 75 places, 82 transitions, 638 flow [2024-10-14 14:37:08,783 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 6.944444444444445) internal successors, (125), 18 states have internal predecessors, (125), 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) [2024-10-14 14:37:08,783 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-14 14:37:08,783 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-14 14:37:08,798 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2024-10-14 14:37:08,983 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-14 14:37:08,984 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-14 14:37:08,984 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 14:37:08,984 INFO L85 PathProgramCache]: Analyzing trace with hash 843215203, now seen corresponding path program 6 times [2024-10-14 14:37:08,984 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 14:37:08,984 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1465492299] [2024-10-14 14:37:08,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 14:37:08,984 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 14:37:09,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 14:37:09,417 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-14 14:37:09,418 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 14:37:09,418 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1465492299] [2024-10-14 14:37:09,418 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1465492299] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-14 14:37:09,418 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1363949582] [2024-10-14 14:37:09,418 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-10-14 14:37:09,419 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-14 14:37:09,419 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-14 14:37:09,420 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) [2024-10-14 14:37:09,422 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-10-14 14:37:09,486 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2024-10-14 14:37:09,486 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-14 14:37:09,487 INFO L255 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 29 conjuncts are in the unsatisfiable core [2024-10-14 14:37:09,489 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-14 14:37:09,504 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 [2024-10-14 14:37:09,636 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 77 treesize of output 49 [2024-10-14 14:37:09,688 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-14 14:37:09,688 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-14 14:37:10,312 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-14 14:37:10,312 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1363949582] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-14 14:37:10,312 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-14 14:37:10,312 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 19 [2024-10-14 14:37:10,313 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [138566395] [2024-10-14 14:37:10,313 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-14 14:37:10,313 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-10-14 14:37:10,313 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 14:37:10,313 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-10-14 14:37:10,313 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=285, Unknown=0, NotChecked=0, Total=342 [2024-10-14 14:37:10,314 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 20 [2024-10-14 14:37:10,314 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 82 transitions, 638 flow. Second operand has 19 states, 19 states have (on average 7.0) internal successors, (133), 19 states have internal predecessors, (133), 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) [2024-10-14 14:37:10,314 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-14 14:37:10,314 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 20 [2024-10-14 14:37:10,314 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-14 14:37:10,770 INFO L124 PetriNetUnfolderBase]: 171/298 cut-off events. [2024-10-14 14:37:10,770 INFO L125 PetriNetUnfolderBase]: For 846/846 co-relation queries the response was YES. [2024-10-14 14:37:10,771 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1468 conditions, 298 events. 171/298 cut-off events. For 846/846 co-relation queries the response was YES. Maximal size of possible extension queue 34. Compared 998 event pairs, 0 based on Foata normal form. 1/287 useless extension candidates. Maximal degree in co-relation 1439. Up to 189 conditions per place. [2024-10-14 14:37:10,772 INFO L140 encePairwiseOnDemand]: 12/20 looper letters, 70 selfloop transitions, 46 changer transitions 5/124 dead transitions. [2024-10-14 14:37:10,773 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 89 places, 124 transitions, 1085 flow [2024-10-14 14:37:10,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-10-14 14:37:10,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2024-10-14 14:37:10,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 159 transitions. [2024-10-14 14:37:10,773 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.496875 [2024-10-14 14:37:10,773 INFO L175 Difference]: Start difference. First operand has 75 places, 82 transitions, 638 flow. Second operand 16 states and 159 transitions. [2024-10-14 14:37:10,773 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 89 places, 124 transitions, 1085 flow [2024-10-14 14:37:10,777 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 81 places, 124 transitions, 975 flow, removed 36 selfloop flow, removed 8 redundant places. [2024-10-14 14:37:10,779 INFO L231 Difference]: Finished difference. Result has 86 places, 92 transitions, 765 flow [2024-10-14 14:37:10,779 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=528, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=82, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=765, PETRI_PLACES=86, PETRI_TRANSITIONS=92} [2024-10-14 14:37:10,779 INFO L277 CegarLoopForPetriNet]: 21 programPoint places, 65 predicate places. [2024-10-14 14:37:10,779 INFO L471 AbstractCegarLoop]: Abstraction has has 86 places, 92 transitions, 765 flow [2024-10-14 14:37:10,779 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 7.0) internal successors, (133), 19 states have internal predecessors, (133), 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) [2024-10-14 14:37:10,780 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-14 14:37:10,780 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-14 14:37:10,792 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2024-10-14 14:37:10,983 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,SelfDestructingSolverStorable10 [2024-10-14 14:37:10,984 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-14 14:37:10,984 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 14:37:10,984 INFO L85 PathProgramCache]: Analyzing trace with hash -769379544, now seen corresponding path program 7 times [2024-10-14 14:37:10,984 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 14:37:10,984 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1469875212] [2024-10-14 14:37:10,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 14:37:10,985 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 14:37:10,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 14:37:11,106 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-14 14:37:11,106 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 14:37:11,106 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1469875212] [2024-10-14 14:37:11,106 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1469875212] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-14 14:37:11,106 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1166372142] [2024-10-14 14:37:11,107 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-10-14 14:37:11,107 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-14 14:37:11,107 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-14 14:37:11,108 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) [2024-10-14 14:37:11,113 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-10-14 14:37:11,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 14:37:11,184 INFO L255 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-10-14 14:37:11,185 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-14 14:37:11,275 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-14 14:37:11,275 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-14 14:37:11,311 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-14 14:37:11,315 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1166372142] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-14 14:37:11,315 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-14 14:37:11,315 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 11 [2024-10-14 14:37:11,315 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [472850210] [2024-10-14 14:37:11,316 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-14 14:37:11,316 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-10-14 14:37:11,316 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 14:37:11,316 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-10-14 14:37:11,316 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2024-10-14 14:37:11,317 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 20 [2024-10-14 14:37:11,317 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 92 transitions, 765 flow. Second operand has 12 states, 12 states have (on average 7.5) internal successors, (90), 12 states have internal predecessors, (90), 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) [2024-10-14 14:37:11,317 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-14 14:37:11,317 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 20 [2024-10-14 14:37:11,317 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-14 14:37:11,458 INFO L124 PetriNetUnfolderBase]: 224/423 cut-off events. [2024-10-14 14:37:11,458 INFO L125 PetriNetUnfolderBase]: For 1845/1845 co-relation queries the response was YES. [2024-10-14 14:37:11,459 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2243 conditions, 423 events. 224/423 cut-off events. For 1845/1845 co-relation queries the response was YES. Maximal size of possible extension queue 51. Compared 1798 event pairs, 62 based on Foata normal form. 27/445 useless extension candidates. Maximal degree in co-relation 2202. Up to 181 conditions per place. [2024-10-14 14:37:11,461 INFO L140 encePairwiseOnDemand]: 15/20 looper letters, 101 selfloop transitions, 19 changer transitions 6/129 dead transitions. [2024-10-14 14:37:11,461 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 88 places, 129 transitions, 1364 flow [2024-10-14 14:37:11,462 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-10-14 14:37:11,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-10-14 14:37:11,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 72 transitions. [2024-10-14 14:37:11,462 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5142857142857142 [2024-10-14 14:37:11,462 INFO L175 Difference]: Start difference. First operand has 86 places, 92 transitions, 765 flow. Second operand 7 states and 72 transitions. [2024-10-14 14:37:11,462 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 88 places, 129 transitions, 1364 flow [2024-10-14 14:37:11,467 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 73 places, 129 transitions, 1176 flow, removed 53 selfloop flow, removed 15 redundant places. [2024-10-14 14:37:11,469 INFO L231 Difference]: Finished difference. Result has 76 places, 92 transitions, 767 flow [2024-10-14 14:37:11,469 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=575, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=83, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=767, PETRI_PLACES=76, PETRI_TRANSITIONS=92} [2024-10-14 14:37:11,470 INFO L277 CegarLoopForPetriNet]: 21 programPoint places, 55 predicate places. [2024-10-14 14:37:11,470 INFO L471 AbstractCegarLoop]: Abstraction has has 76 places, 92 transitions, 767 flow [2024-10-14 14:37:11,470 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 7.5) internal successors, (90), 12 states have internal predecessors, (90), 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) [2024-10-14 14:37:11,470 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-14 14:37:11,470 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-14 14:37:11,483 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2024-10-14 14:37:11,674 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-14 14:37:11,674 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-14 14:37:11,675 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 14:37:11,675 INFO L85 PathProgramCache]: Analyzing trace with hash -1983300111, now seen corresponding path program 8 times [2024-10-14 14:37:11,675 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 14:37:11,675 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1101983207] [2024-10-14 14:37:11,675 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 14:37:11,675 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 14:37:11,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 14:37:11,764 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-14 14:37:11,765 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 14:37:11,765 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1101983207] [2024-10-14 14:37:11,765 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1101983207] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-14 14:37:11,765 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1090552403] [2024-10-14 14:37:11,765 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-14 14:37:11,765 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-14 14:37:11,765 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-14 14:37:11,767 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) [2024-10-14 14:37:11,772 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-10-14 14:37:11,838 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-14 14:37:11,839 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-14 14:37:11,839 INFO L255 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-10-14 14:37:11,842 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-14 14:37:11,896 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-14 14:37:11,896 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-14 14:37:11,944 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-14 14:37:11,945 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1090552403] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-14 14:37:11,945 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-14 14:37:11,945 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 6] total 14 [2024-10-14 14:37:11,945 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1303156563] [2024-10-14 14:37:11,945 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-14 14:37:11,945 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-10-14 14:37:11,946 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 14:37:11,946 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-10-14 14:37:11,946 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2024-10-14 14:37:11,946 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 20 [2024-10-14 14:37:11,946 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 92 transitions, 767 flow. Second operand has 14 states, 14 states have (on average 7.642857142857143) internal successors, (107), 14 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) [2024-10-14 14:37:11,946 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-14 14:37:11,946 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 20 [2024-10-14 14:37:11,947 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-14 14:37:12,129 INFO L124 PetriNetUnfolderBase]: 164/313 cut-off events. [2024-10-14 14:37:12,130 INFO L125 PetriNetUnfolderBase]: For 1174/1174 co-relation queries the response was YES. [2024-10-14 14:37:12,131 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1602 conditions, 313 events. 164/313 cut-off events. For 1174/1174 co-relation queries the response was YES. Maximal size of possible extension queue 35. Compared 1184 event pairs, 3 based on Foata normal form. 19/328 useless extension candidates. Maximal degree in co-relation 1432. Up to 124 conditions per place. [2024-10-14 14:37:12,132 INFO L140 encePairwiseOnDemand]: 13/20 looper letters, 75 selfloop transitions, 27 changer transitions 21/126 dead transitions. [2024-10-14 14:37:12,132 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 89 places, 126 transitions, 1164 flow [2024-10-14 14:37:12,132 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-10-14 14:37:12,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2024-10-14 14:37:12,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 139 transitions. [2024-10-14 14:37:12,133 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.49642857142857144 [2024-10-14 14:37:12,133 INFO L175 Difference]: Start difference. First operand has 76 places, 92 transitions, 767 flow. Second operand 14 states and 139 transitions. [2024-10-14 14:37:12,133 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 89 places, 126 transitions, 1164 flow [2024-10-14 14:37:12,137 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 87 places, 126 transitions, 1141 flow, removed 9 selfloop flow, removed 2 redundant places. [2024-10-14 14:37:12,142 INFO L231 Difference]: Finished difference. Result has 91 places, 84 transitions, 747 flow [2024-10-14 14:37:12,142 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=663, PETRI_DIFFERENCE_MINUEND_PLACES=74, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=86, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=747, PETRI_PLACES=91, PETRI_TRANSITIONS=84} [2024-10-14 14:37:12,142 INFO L277 CegarLoopForPetriNet]: 21 programPoint places, 70 predicate places. [2024-10-14 14:37:12,142 INFO L471 AbstractCegarLoop]: Abstraction has has 91 places, 84 transitions, 747 flow [2024-10-14 14:37:12,143 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 7.642857142857143) internal successors, (107), 14 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) [2024-10-14 14:37:12,143 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-14 14:37:12,143 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-14 14:37:12,156 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2024-10-14 14:37:12,344 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,SelfDestructingSolverStorable12 [2024-10-14 14:37:12,344 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-14 14:37:12,344 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 14:37:12,344 INFO L85 PathProgramCache]: Analyzing trace with hash 460599964, now seen corresponding path program 9 times [2024-10-14 14:37:12,344 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 14:37:12,344 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [713332056] [2024-10-14 14:37:12,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 14:37:12,345 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 14:37:12,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 14:37:12,428 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-10-14 14:37:12,428 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 14:37:12,429 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [713332056] [2024-10-14 14:37:12,429 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [713332056] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-14 14:37:12,429 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1598286332] [2024-10-14 14:37:12,429 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-10-14 14:37:12,429 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-14 14:37:12,429 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-14 14:37:12,431 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) [2024-10-14 14:37:12,432 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-10-14 14:37:12,493 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-10-14 14:37:12,493 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-14 14:37:12,494 INFO L255 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-10-14 14:37:12,495 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-14 14:37:12,544 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-10-14 14:37:12,544 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-14 14:37:12,585 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-10-14 14:37:12,585 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1598286332] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-14 14:37:12,585 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-14 14:37:12,585 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2024-10-14 14:37:12,585 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [953681131] [2024-10-14 14:37:12,585 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-14 14:37:12,586 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-10-14 14:37:12,586 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 14:37:12,586 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-10-14 14:37:12,586 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=110, Unknown=0, NotChecked=0, Total=156 [2024-10-14 14:37:12,586 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 20 [2024-10-14 14:37:12,587 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 91 places, 84 transitions, 747 flow. Second operand has 13 states, 13 states have (on average 7.153846153846154) internal successors, (93), 13 states have internal predecessors, (93), 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) [2024-10-14 14:37:12,587 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-14 14:37:12,587 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 20 [2024-10-14 14:37:12,587 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-14 14:37:12,695 INFO L124 PetriNetUnfolderBase]: 144/253 cut-off events. [2024-10-14 14:37:12,695 INFO L125 PetriNetUnfolderBase]: For 1297/1297 co-relation queries the response was YES. [2024-10-14 14:37:12,696 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1464 conditions, 253 events. 144/253 cut-off events. For 1297/1297 co-relation queries the response was YES. Maximal size of possible extension queue 30. Compared 804 event pairs, 10 based on Foata normal form. 18/261 useless extension candidates. Maximal degree in co-relation 1419. Up to 161 conditions per place. [2024-10-14 14:37:12,699 INFO L140 encePairwiseOnDemand]: 15/20 looper letters, 66 selfloop transitions, 23 changer transitions 0/92 dead transitions. [2024-10-14 14:37:12,699 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 87 places, 92 transitions, 1012 flow [2024-10-14 14:37:12,699 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-10-14 14:37:12,699 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-10-14 14:37:12,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 69 transitions. [2024-10-14 14:37:12,700 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.43125 [2024-10-14 14:37:12,700 INFO L175 Difference]: Start difference. First operand has 91 places, 84 transitions, 747 flow. Second operand 8 states and 69 transitions. [2024-10-14 14:37:12,700 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 87 places, 92 transitions, 1012 flow [2024-10-14 14:37:12,704 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 92 transitions, 886 flow, removed 39 selfloop flow, removed 13 redundant places. [2024-10-14 14:37:12,706 INFO L231 Difference]: Finished difference. Result has 75 places, 80 transitions, 692 flow [2024-10-14 14:37:12,706 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=575, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=76, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=692, PETRI_PLACES=75, PETRI_TRANSITIONS=80} [2024-10-14 14:37:12,706 INFO L277 CegarLoopForPetriNet]: 21 programPoint places, 54 predicate places. [2024-10-14 14:37:12,706 INFO L471 AbstractCegarLoop]: Abstraction has has 75 places, 80 transitions, 692 flow [2024-10-14 14:37:12,707 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 7.153846153846154) internal successors, (93), 13 states have internal predecessors, (93), 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) [2024-10-14 14:37:12,707 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-14 14:37:12,707 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-14 14:37:12,720 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2024-10-14 14:37:12,911 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,SelfDestructingSolverStorable13 [2024-10-14 14:37:12,912 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-14 14:37:12,912 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 14:37:12,912 INFO L85 PathProgramCache]: Analyzing trace with hash 456587555, now seen corresponding path program 10 times [2024-10-14 14:37:12,912 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 14:37:12,912 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [358824507] [2024-10-14 14:37:12,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 14:37:12,913 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 14:37:12,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 14:37:12,998 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-14 14:37:12,998 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 14:37:12,998 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [358824507] [2024-10-14 14:37:12,998 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [358824507] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-14 14:37:12,998 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2082439866] [2024-10-14 14:37:12,998 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-10-14 14:37:12,998 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-14 14:37:12,999 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-14 14:37:13,000 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) [2024-10-14 14:37:13,002 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-10-14 14:37:13,068 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-10-14 14:37:13,069 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-14 14:37:13,070 INFO L255 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-10-14 14:37:13,070 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-14 14:37:13,123 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-14 14:37:13,124 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-14 14:37:13,169 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-14 14:37:13,170 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2082439866] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-14 14:37:13,170 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-14 14:37:13,170 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2024-10-14 14:37:13,170 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1338892010] [2024-10-14 14:37:13,170 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-14 14:37:13,170 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-10-14 14:37:13,171 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 14:37:13,171 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-10-14 14:37:13,171 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=110, Unknown=0, NotChecked=0, Total=156 [2024-10-14 14:37:13,171 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 20 [2024-10-14 14:37:13,171 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 80 transitions, 692 flow. Second operand has 13 states, 13 states have (on average 7.384615384615385) internal successors, (96), 13 states have internal predecessors, (96), 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) [2024-10-14 14:37:13,172 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-14 14:37:13,172 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 20 [2024-10-14 14:37:13,172 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-14 14:37:13,265 INFO L124 PetriNetUnfolderBase]: 146/258 cut-off events. [2024-10-14 14:37:13,265 INFO L125 PetriNetUnfolderBase]: For 1297/1297 co-relation queries the response was YES. [2024-10-14 14:37:13,265 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1431 conditions, 258 events. 146/258 cut-off events. For 1297/1297 co-relation queries the response was YES. Maximal size of possible extension queue 25. Compared 809 event pairs, 18 based on Foata normal form. 15/264 useless extension candidates. Maximal degree in co-relation 1392. Up to 141 conditions per place. [2024-10-14 14:37:13,267 INFO L140 encePairwiseOnDemand]: 15/20 looper letters, 61 selfloop transitions, 20 changer transitions 0/84 dead transitions. [2024-10-14 14:37:13,267 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 84 transitions, 880 flow [2024-10-14 14:37:13,267 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-10-14 14:37:13,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-10-14 14:37:13,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 67 transitions. [2024-10-14 14:37:13,267 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.41875 [2024-10-14 14:37:13,268 INFO L175 Difference]: Start difference. First operand has 75 places, 80 transitions, 692 flow. Second operand 8 states and 67 transitions. [2024-10-14 14:37:13,268 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 84 transitions, 880 flow [2024-10-14 14:37:13,270 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 84 transitions, 841 flow, removed 8 selfloop flow, removed 6 redundant places. [2024-10-14 14:37:13,271 INFO L231 Difference]: Finished difference. Result has 73 places, 75 transitions, 672 flow [2024-10-14 14:37:13,271 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=580, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=72, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=672, PETRI_PLACES=73, PETRI_TRANSITIONS=75} [2024-10-14 14:37:13,272 INFO L277 CegarLoopForPetriNet]: 21 programPoint places, 52 predicate places. [2024-10-14 14:37:13,272 INFO L471 AbstractCegarLoop]: Abstraction has has 73 places, 75 transitions, 672 flow [2024-10-14 14:37:13,272 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 7.384615384615385) internal successors, (96), 13 states have internal predecessors, (96), 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) [2024-10-14 14:37:13,272 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-14 14:37:13,272 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-14 14:37:13,285 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2024-10-14 14:37:13,472 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,SelfDestructingSolverStorable14 [2024-10-14 14:37:13,473 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-14 14:37:13,474 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 14:37:13,474 INFO L85 PathProgramCache]: Analyzing trace with hash -353031292, now seen corresponding path program 11 times [2024-10-14 14:37:13,474 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 14:37:13,474 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [536970885] [2024-10-14 14:37:13,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 14:37:13,474 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 14:37:13,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 14:37:15,006 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-14 14:37:15,006 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 14:37:15,006 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [536970885] [2024-10-14 14:37:15,006 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [536970885] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-14 14:37:15,006 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1406147880] [2024-10-14 14:37:15,007 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-10-14 14:37:15,007 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-14 14:37:15,007 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-14 14:37:15,011 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) [2024-10-14 14:37:15,012 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-10-14 14:37:15,090 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-14 14:37:15,090 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-14 14:37:15,091 INFO L255 TraceCheckSpWp]: Trace formula consists of 196 conjuncts, 28 conjuncts are in the unsatisfiable core [2024-10-14 14:37:15,093 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-14 14:37:16,125 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-14 14:37:16,125 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 281 treesize of output 257 [2024-10-14 14:37:18,381 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-14 14:37:18,381 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-14 14:37:20,111 INFO L349 Elim1Store]: treesize reduction 18, result has 60.0 percent of original size [2024-10-14 14:37:20,112 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 954 treesize of output 416 [2024-10-14 14:37:23,179 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-10-14 14:37:23,179 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1406147880] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-14 14:37:23,180 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-14 14:37:23,180 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 9] total 25 [2024-10-14 14:37:23,180 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [55491191] [2024-10-14 14:37:23,180 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-14 14:37:23,180 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2024-10-14 14:37:23,180 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 14:37:23,181 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2024-10-14 14:37:23,181 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=529, Unknown=0, NotChecked=0, Total=600 [2024-10-14 14:37:23,181 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 20 [2024-10-14 14:37:23,181 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 75 transitions, 672 flow. Second operand has 25 states, 25 states have (on average 6.8) internal successors, (170), 25 states have internal predecessors, (170), 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) [2024-10-14 14:37:23,181 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-14 14:37:23,182 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 20 [2024-10-14 14:37:23,182 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-14 14:37:25,235 INFO L124 PetriNetUnfolderBase]: 178/318 cut-off events. [2024-10-14 14:37:25,236 INFO L125 PetriNetUnfolderBase]: For 1741/1741 co-relation queries the response was YES. [2024-10-14 14:37:25,236 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1911 conditions, 318 events. 178/318 cut-off events. For 1741/1741 co-relation queries the response was YES. Maximal size of possible extension queue 32. Compared 1103 event pairs, 2 based on Foata normal form. 1/317 useless extension candidates. Maximal degree in co-relation 1872. Up to 187 conditions per place. [2024-10-14 14:37:25,238 INFO L140 encePairwiseOnDemand]: 12/20 looper letters, 82 selfloop transitions, 40 changer transitions 5/130 dead transitions. [2024-10-14 14:37:25,238 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 94 places, 130 transitions, 1271 flow [2024-10-14 14:37:25,238 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2024-10-14 14:37:25,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2024-10-14 14:37:25,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 199 transitions. [2024-10-14 14:37:25,240 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.45227272727272727 [2024-10-14 14:37:25,240 INFO L175 Difference]: Start difference. First operand has 73 places, 75 transitions, 672 flow. Second operand 22 states and 199 transitions. [2024-10-14 14:37:25,240 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 94 places, 130 transitions, 1271 flow [2024-10-14 14:37:25,245 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 89 places, 130 transitions, 1204 flow, removed 26 selfloop flow, removed 5 redundant places. [2024-10-14 14:37:25,247 INFO L231 Difference]: Finished difference. Result has 95 places, 89 transitions, 936 flow [2024-10-14 14:37:25,247 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=641, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=75, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=936, PETRI_PLACES=95, PETRI_TRANSITIONS=89} [2024-10-14 14:37:25,247 INFO L277 CegarLoopForPetriNet]: 21 programPoint places, 74 predicate places. [2024-10-14 14:37:25,247 INFO L471 AbstractCegarLoop]: Abstraction has has 95 places, 89 transitions, 936 flow [2024-10-14 14:37:25,249 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 6.8) internal successors, (170), 25 states have internal predecessors, (170), 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) [2024-10-14 14:37:25,249 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-14 14:37:25,249 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-14 14:37:25,263 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2024-10-14 14:37:25,449 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,SelfDestructingSolverStorable15 [2024-10-14 14:37:25,450 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-14 14:37:25,451 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 14:37:25,451 INFO L85 PathProgramCache]: Analyzing trace with hash -834308218, now seen corresponding path program 12 times [2024-10-14 14:37:25,451 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 14:37:25,451 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1730270203] [2024-10-14 14:37:25,451 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 14:37:25,451 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 14:37:25,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 14:37:27,458 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-14 14:37:27,458 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 14:37:27,458 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1730270203] [2024-10-14 14:37:27,458 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1730270203] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-14 14:37:27,459 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1022825148] [2024-10-14 14:37:27,459 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-10-14 14:37:27,459 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-14 14:37:27,459 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-14 14:37:27,462 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) [2024-10-14 14:37:27,464 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2024-10-14 14:37:27,543 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2024-10-14 14:37:27,543 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-14 14:37:27,544 INFO L255 TraceCheckSpWp]: Trace formula consists of 196 conjuncts, 33 conjuncts are in the unsatisfiable core [2024-10-14 14:37:27,546 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-14 14:37:28,087 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-14 14:37:28,087 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 196 treesize of output 140 [2024-10-14 14:37:28,187 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-14 14:37:28,187 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-14 14:37:29,155 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-14 14:37:29,156 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 966 treesize of output 426 [2024-10-14 14:37:37,916 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-10-14 14:37:37,916 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1022825148] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-14 14:37:37,916 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-14 14:37:37,916 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 24 [2024-10-14 14:37:37,917 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [976419366] [2024-10-14 14:37:37,917 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-14 14:37:37,917 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2024-10-14 14:37:37,917 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 14:37:37,918 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2024-10-14 14:37:37,918 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=468, Unknown=0, NotChecked=0, Total=552 [2024-10-14 14:37:37,918 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 20 [2024-10-14 14:37:37,918 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 95 places, 89 transitions, 936 flow. Second operand has 24 states, 24 states have (on average 6.708333333333333) internal successors, (161), 24 states have internal predecessors, (161), 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) [2024-10-14 14:37:37,918 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-14 14:37:37,918 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 20 [2024-10-14 14:37:37,919 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-14 14:37:39,131 INFO L124 PetriNetUnfolderBase]: 224/396 cut-off events. [2024-10-14 14:37:39,131 INFO L125 PetriNetUnfolderBase]: For 2400/2400 co-relation queries the response was YES. [2024-10-14 14:37:39,133 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2613 conditions, 396 events. 224/396 cut-off events. For 2400/2400 co-relation queries the response was YES. Maximal size of possible extension queue 40. Compared 1491 event pairs, 3 based on Foata normal form. 1/395 useless extension candidates. Maximal degree in co-relation 2577. Up to 265 conditions per place. [2024-10-14 14:37:39,136 INFO L140 encePairwiseOnDemand]: 12/20 looper letters, 86 selfloop transitions, 60 changer transitions 5/154 dead transitions. [2024-10-14 14:37:39,140 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 116 places, 154 transitions, 1757 flow [2024-10-14 14:37:39,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2024-10-14 14:37:39,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2024-10-14 14:37:39,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 214 transitions. [2024-10-14 14:37:39,141 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4652173913043478 [2024-10-14 14:37:39,141 INFO L175 Difference]: Start difference. First operand has 95 places, 89 transitions, 936 flow. Second operand 23 states and 214 transitions. [2024-10-14 14:37:39,141 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 116 places, 154 transitions, 1757 flow [2024-10-14 14:37:39,157 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 103 places, 154 transitions, 1580 flow, removed 70 selfloop flow, removed 13 redundant places. [2024-10-14 14:37:39,164 INFO L231 Difference]: Finished difference. Result has 111 places, 114 transitions, 1341 flow [2024-10-14 14:37:39,165 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=795, PETRI_DIFFERENCE_MINUEND_PLACES=81, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=89, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=1341, PETRI_PLACES=111, PETRI_TRANSITIONS=114} [2024-10-14 14:37:39,166 INFO L277 CegarLoopForPetriNet]: 21 programPoint places, 90 predicate places. [2024-10-14 14:37:39,166 INFO L471 AbstractCegarLoop]: Abstraction has has 111 places, 114 transitions, 1341 flow [2024-10-14 14:37:39,170 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 6.708333333333333) internal successors, (161), 24 states have internal predecessors, (161), 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) [2024-10-14 14:37:39,170 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-14 14:37:39,170 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-14 14:37:39,200 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2024-10-14 14:37:39,371 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-14 14:37:39,371 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-14 14:37:39,372 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 14:37:39,372 INFO L85 PathProgramCache]: Analyzing trace with hash -1693777394, now seen corresponding path program 13 times [2024-10-14 14:37:39,372 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 14:37:39,372 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1767607984] [2024-10-14 14:37:39,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 14:37:39,372 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 14:37:39,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 14:37:40,898 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-14 14:37:40,899 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 14:37:40,899 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1767607984] [2024-10-14 14:37:40,899 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1767607984] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-14 14:37:40,899 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [664877111] [2024-10-14 14:37:40,899 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-10-14 14:37:40,899 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-14 14:37:40,899 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-14 14:37:40,901 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) [2024-10-14 14:37:40,902 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2024-10-14 14:37:40,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 14:37:40,989 INFO L255 TraceCheckSpWp]: Trace formula consists of 196 conjuncts, 31 conjuncts are in the unsatisfiable core [2024-10-14 14:37:40,991 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-14 14:37:41,569 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-14 14:37:41,569 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 223 treesize of output 145 [2024-10-14 14:37:41,865 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-14 14:37:41,865 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-14 14:37:42,918 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-14 14:37:42,919 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 966 treesize of output 426 [2024-10-14 14:37:50,685 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-10-14 14:37:50,685 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [664877111] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-14 14:37:50,685 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-14 14:37:50,685 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 27 [2024-10-14 14:37:50,686 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [171151087] [2024-10-14 14:37:50,686 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-14 14:37:50,686 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2024-10-14 14:37:50,686 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 14:37:50,686 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2024-10-14 14:37:50,687 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=612, Unknown=0, NotChecked=0, Total=702 [2024-10-14 14:37:50,687 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 20 [2024-10-14 14:37:50,687 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 111 places, 114 transitions, 1341 flow. Second operand has 27 states, 27 states have (on average 6.62962962962963) internal successors, (179), 27 states have internal predecessors, (179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 14:37:50,687 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-14 14:37:50,687 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 20 [2024-10-14 14:37:50,687 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-14 14:37:52,032 INFO L124 PetriNetUnfolderBase]: 283/498 cut-off events. [2024-10-14 14:37:52,032 INFO L125 PetriNetUnfolderBase]: For 3258/3258 co-relation queries the response was YES. [2024-10-14 14:37:52,034 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3384 conditions, 498 events. 283/498 cut-off events. For 3258/3258 co-relation queries the response was YES. Maximal size of possible extension queue 49. Compared 1979 event pairs, 4 based on Foata normal form. 1/497 useless extension candidates. Maximal degree in co-relation 3341. Up to 319 conditions per place. [2024-10-14 14:37:52,037 INFO L140 encePairwiseOnDemand]: 12/20 looper letters, 115 selfloop transitions, 74 changer transitions 5/197 dead transitions. [2024-10-14 14:37:52,037 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 136 places, 197 transitions, 2358 flow [2024-10-14 14:37:52,037 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2024-10-14 14:37:52,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2024-10-14 14:37:52,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 259 transitions. [2024-10-14 14:37:52,039 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.47962962962962963 [2024-10-14 14:37:52,039 INFO L175 Difference]: Start difference. First operand has 111 places, 114 transitions, 1341 flow. Second operand 27 states and 259 transitions. [2024-10-14 14:37:52,039 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 136 places, 197 transitions, 2358 flow [2024-10-14 14:37:52,048 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 124 places, 197 transitions, 2081 flow, removed 113 selfloop flow, removed 12 redundant places. [2024-10-14 14:37:52,051 INFO L231 Difference]: Finished difference. Result has 128 places, 144 transitions, 1712 flow [2024-10-14 14:37:52,051 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=1108, PETRI_DIFFERENCE_MINUEND_PLACES=98, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=114, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=49, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=27, PETRI_FLOW=1712, PETRI_PLACES=128, PETRI_TRANSITIONS=144} [2024-10-14 14:37:52,051 INFO L277 CegarLoopForPetriNet]: 21 programPoint places, 107 predicate places. [2024-10-14 14:37:52,051 INFO L471 AbstractCegarLoop]: Abstraction has has 128 places, 144 transitions, 1712 flow [2024-10-14 14:37:52,051 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 6.62962962962963) internal successors, (179), 27 states have internal predecessors, (179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 14:37:52,052 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-14 14:37:52,052 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-14 14:37:52,078 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2024-10-14 14:37:52,255 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2024-10-14 14:37:52,256 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-14 14:37:52,256 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 14:37:52,256 INFO L85 PathProgramCache]: Analyzing trace with hash -1728974456, now seen corresponding path program 14 times [2024-10-14 14:37:52,256 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 14:37:52,256 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1389277467] [2024-10-14 14:37:52,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 14:37:52,257 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 14:37:52,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 14:37:53,245 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-14 14:37:53,245 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 14:37:53,245 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1389277467] [2024-10-14 14:37:53,245 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1389277467] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-14 14:37:53,245 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [904259020] [2024-10-14 14:37:53,246 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-14 14:37:53,246 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-14 14:37:53,246 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-14 14:37:53,247 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) [2024-10-14 14:37:53,248 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2024-10-14 14:37:53,324 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-14 14:37:53,324 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-14 14:37:53,326 INFO L255 TraceCheckSpWp]: Trace formula consists of 196 conjuncts, 44 conjuncts are in the unsatisfiable core [2024-10-14 14:37:53,328 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-14 14:37:53,348 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 [2024-10-14 14:37:53,367 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 [2024-10-14 14:37:54,040 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-14 14:37:54,040 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 250 treesize of output 256 [2024-10-14 14:37:59,687 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-14 14:37:59,688 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-14 14:38:06,791 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 237 treesize of output 217 [2024-10-14 14:38:06,812 INFO L349 Elim1Store]: treesize reduction 5, result has 70.6 percent of original size [2024-10-14 14:38:06,812 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 3 new quantified variables, introduced 3 case distinctions, treesize of input 1223 treesize of output 1106 [2024-10-14 14:38:08,551 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 189 treesize of output 173 [2024-10-14 14:38:08,563 INFO L349 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2024-10-14 14:38:08,563 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 3 new quantified variables, introduced 3 case distinctions, treesize of input 3486 treesize of output 1 [2024-10-14 14:38:08,566 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 146 treesize of output 134 [2024-10-14 14:38:08,575 INFO L349 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2024-10-14 14:38:08,575 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 3 new quantified variables, introduced 3 case distinctions, treesize of input 1929 treesize of output 1 [2024-10-14 14:38:08,578 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 94 treesize of output 86 [2024-10-14 14:38:08,584 INFO L349 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2024-10-14 14:38:08,585 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 3 new quantified variables, introduced 3 case distinctions, treesize of input 484 treesize of output 1 [2024-10-14 14:38:08,588 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 120 treesize of output 110 [2024-10-14 14:38:08,595 INFO L349 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2024-10-14 14:38:08,595 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 3 new quantified variables, introduced 3 case distinctions, treesize of input 799 treesize of output 1 [2024-10-14 14:38:08,598 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 288 treesize of output 264 [2024-10-14 14:38:08,608 INFO L349 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2024-10-14 14:38:08,609 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 3 new quantified variables, introduced 3 case distinctions, treesize of input 1540 treesize of output 1 [2024-10-14 14:38:08,612 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 123 treesize of output 113 [2024-10-14 14:38:08,620 INFO L349 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2024-10-14 14:38:08,620 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 3 new quantified variables, introduced 3 case distinctions, treesize of input 829 treesize of output 1 [2024-10-14 14:38:08,664 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-14 14:38:08,665 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [904259020] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-14 14:38:08,665 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-14 14:38:08,665 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 29 [2024-10-14 14:38:08,665 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1323589245] [2024-10-14 14:38:08,665 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-14 14:38:08,666 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2024-10-14 14:38:08,666 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 14:38:08,666 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2024-10-14 14:38:08,667 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=759, Unknown=0, NotChecked=0, Total=870 [2024-10-14 14:38:08,667 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 20 [2024-10-14 14:38:08,667 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 128 places, 144 transitions, 1712 flow. Second operand has 30 states, 30 states have (on average 6.5) internal successors, (195), 30 states have internal predecessors, (195), 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) [2024-10-14 14:38:08,667 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-14 14:38:08,667 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 20 [2024-10-14 14:38:08,667 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-14 14:38:14,085 INFO L124 PetriNetUnfolderBase]: 296/525 cut-off events. [2024-10-14 14:38:14,085 INFO L125 PetriNetUnfolderBase]: For 3366/3366 co-relation queries the response was YES. [2024-10-14 14:38:14,087 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3481 conditions, 525 events. 296/525 cut-off events. For 3366/3366 co-relation queries the response was YES. Maximal size of possible extension queue 54. Compared 2158 event pairs, 6 based on Foata normal form. 1/522 useless extension candidates. Maximal degree in co-relation 3434. Up to 356 conditions per place. [2024-10-14 14:38:14,092 INFO L140 encePairwiseOnDemand]: 12/20 looper letters, 115 selfloop transitions, 72 changer transitions 4/194 dead transitions. [2024-10-14 14:38:14,092 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 152 places, 194 transitions, 2357 flow [2024-10-14 14:38:14,093 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2024-10-14 14:38:14,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2024-10-14 14:38:14,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 229 transitions. [2024-10-14 14:38:14,097 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4403846153846154 [2024-10-14 14:38:14,097 INFO L175 Difference]: Start difference. First operand has 128 places, 144 transitions, 1712 flow. Second operand 26 states and 229 transitions. [2024-10-14 14:38:14,097 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 152 places, 194 transitions, 2357 flow [2024-10-14 14:38:14,119 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 138 places, 194 transitions, 2126 flow, removed 85 selfloop flow, removed 14 redundant places. [2024-10-14 14:38:14,121 INFO L231 Difference]: Finished difference. Result has 144 places, 157 transitions, 1857 flow [2024-10-14 14:38:14,122 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=1483, PETRI_DIFFERENCE_MINUEND_PLACES=113, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=144, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=59, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=76, PETRI_DIFFERENCE_SUBTRAHEND_STATES=26, PETRI_FLOW=1857, PETRI_PLACES=144, PETRI_TRANSITIONS=157} [2024-10-14 14:38:14,122 INFO L277 CegarLoopForPetriNet]: 21 programPoint places, 123 predicate places. [2024-10-14 14:38:14,123 INFO L471 AbstractCegarLoop]: Abstraction has has 144 places, 157 transitions, 1857 flow [2024-10-14 14:38:14,123 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 6.5) internal successors, (195), 30 states have internal predecessors, (195), 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) [2024-10-14 14:38:14,123 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-14 14:38:14,123 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-14 14:38:14,137 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2024-10-14 14:38:14,323 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-14 14:38:14,324 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-14 14:38:14,325 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 14:38:14,325 INFO L85 PathProgramCache]: Analyzing trace with hash 422223724, now seen corresponding path program 15 times [2024-10-14 14:38:14,325 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 14:38:14,325 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1400077369] [2024-10-14 14:38:14,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 14:38:14,325 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 14:38:14,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 14:38:15,279 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-14 14:38:15,279 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 14:38:15,279 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1400077369] [2024-10-14 14:38:15,280 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1400077369] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-14 14:38:15,280 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1956670114] [2024-10-14 14:38:15,280 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-10-14 14:38:15,280 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-14 14:38:15,280 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-14 14:38:15,281 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) [2024-10-14 14:38:15,282 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2024-10-14 14:38:15,363 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-10-14 14:38:15,363 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-14 14:38:15,365 INFO L255 TraceCheckSpWp]: Trace formula consists of 196 conjuncts, 42 conjuncts are in the unsatisfiable core [2024-10-14 14:38:15,367 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-14 14:38:15,399 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 [2024-10-14 14:38:16,005 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-14 14:38:16,006 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 278 treesize of output 262 [2024-10-14 14:38:20,662 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-14 14:38:20,662 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-14 14:38:25,258 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 175 treesize of output 153 [2024-10-14 14:38:25,274 INFO L349 Elim1Store]: treesize reduction 5, result has 70.6 percent of original size [2024-10-14 14:38:25,275 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 3 new quantified variables, introduced 3 case distinctions, treesize of input 365 treesize of output 290