./Ultimate.py --spec /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/properties/unreach-call.prp --file /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/chl-chromosome-trans.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 84cfde4a Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/chl-chromosome-trans.wvr.c -s /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash f36f5593156fc25b34b4c706b0d898a2d66ee8bab5f6d91cd69ff9cf3c129193 --- Real Ultimate output --- This is Ultimate 0.2.5-dev-84cfde4 [2024-10-11 14:26:28,774 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-10-11 14:26:28,834 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-10-11 14:26:28,838 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-10-11 14:26:28,839 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-10-11 14:26:28,864 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-10-11 14:26:28,865 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-10-11 14:26:28,866 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-10-11 14:26:28,866 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-10-11 14:26:28,867 INFO L153 SettingsManager]: * Use memory slicer=true [2024-10-11 14:26:28,868 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-10-11 14:26:28,868 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-10-11 14:26:28,868 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-10-11 14:26:28,869 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-10-11 14:26:28,871 INFO L153 SettingsManager]: * Use SBE=true [2024-10-11 14:26:28,871 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-10-11 14:26:28,871 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-10-11 14:26:28,871 INFO L153 SettingsManager]: * sizeof long=4 [2024-10-11 14:26:28,872 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-10-11 14:26:28,872 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-10-11 14:26:28,872 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-10-11 14:26:28,872 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-10-11 14:26:28,872 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-10-11 14:26:28,873 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-10-11 14:26:28,873 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-10-11 14:26:28,873 INFO L153 SettingsManager]: * sizeof long double=12 [2024-10-11 14:26:28,873 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-10-11 14:26:28,873 INFO L153 SettingsManager]: * Use constant arrays=true [2024-10-11 14:26:28,873 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-10-11 14:26:28,873 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-10-11 14:26:28,873 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-10-11 14:26:28,874 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-10-11 14:26:28,874 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-11 14:26:28,874 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-10-11 14:26:28,874 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-10-11 14:26:28,874 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-10-11 14:26:28,874 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-10-11 14:26:28,874 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-10-11 14:26:28,874 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-10-11 14:26:28,875 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-10-11 14:26:28,875 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-10-11 14:26:28,877 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-10-11 14:26:28,877 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-clean/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> f36f5593156fc25b34b4c706b0d898a2d66ee8bab5f6d91cd69ff9cf3c129193 [2024-10-11 14:26:29,092 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-10-11 14:26:29,114 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-10-11 14:26:29,116 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-10-11 14:26:29,117 INFO L270 PluginConnector]: Initializing CDTParser... [2024-10-11 14:26:29,118 INFO L274 PluginConnector]: CDTParser initialized [2024-10-11 14:26:29,119 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/chl-chromosome-trans.wvr.c [2024-10-11 14:26:30,493 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-10-11 14:26:30,660 INFO L384 CDTParser]: Found 1 translation units. [2024-10-11 14:26:30,660 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/chl-chromosome-trans.wvr.c [2024-10-11 14:26:30,667 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/data/2d7e7b8ca/9f702ac2222b4a47b78c92585b73a7e3/FLAGa63ebbb03 [2024-10-11 14:26:31,054 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/data/2d7e7b8ca/9f702ac2222b4a47b78c92585b73a7e3 [2024-10-11 14:26:31,056 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-10-11 14:26:31,058 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-10-11 14:26:31,060 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-10-11 14:26:31,061 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-10-11 14:26:31,065 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-10-11 14:26:31,065 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.10 02:26:31" (1/1) ... [2024-10-11 14:26:31,066 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@77f4608 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:26:31, skipping insertion in model container [2024-10-11 14:26:31,066 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.10 02:26:31" (1/1) ... [2024-10-11 14:26:31,086 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-10-11 14:26:31,240 WARN L248 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/chl-chromosome-trans.wvr.c[3073,3086] [2024-10-11 14:26:31,254 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-11 14:26:31,261 INFO L200 MainTranslator]: Completed pre-run [2024-10-11 14:26:31,278 WARN L248 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/chl-chromosome-trans.wvr.c[3073,3086] [2024-10-11 14:26:31,281 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-11 14:26:31,294 INFO L204 MainTranslator]: Completed translation [2024-10-11 14:26:31,295 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:26:31 WrapperNode [2024-10-11 14:26:31,295 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-10-11 14:26:31,296 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-10-11 14:26:31,296 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-10-11 14:26:31,296 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-10-11 14:26:31,301 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:26:31" (1/1) ... [2024-10-11 14:26:31,309 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:26:31" (1/1) ... [2024-10-11 14:26:31,331 INFO L138 Inliner]: procedures = 25, calls = 31, calls flagged for inlining = 16, calls inlined = 24, statements flattened = 267 [2024-10-11 14:26:31,332 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-10-11 14:26:31,332 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-10-11 14:26:31,332 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-10-11 14:26:31,333 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-10-11 14:26:31,372 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:26:31" (1/1) ... [2024-10-11 14:26:31,372 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:26:31" (1/1) ... [2024-10-11 14:26:31,383 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:26:31" (1/1) ... [2024-10-11 14:26:31,422 INFO L175 MemorySlicer]: Split 11 memory accesses to 2 slices as follows [2, 9]. 82 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0]. The 3 writes are split as follows [0, 3]. [2024-10-11 14:26:31,423 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:26:31" (1/1) ... [2024-10-11 14:26:31,425 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:26:31" (1/1) ... [2024-10-11 14:26:31,433 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:26:31" (1/1) ... [2024-10-11 14:26:31,437 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:26:31" (1/1) ... [2024-10-11 14:26:31,438 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:26:31" (1/1) ... [2024-10-11 14:26:31,440 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:26:31" (1/1) ... [2024-10-11 14:26:31,442 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-10-11 14:26:31,443 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-10-11 14:26:31,443 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-10-11 14:26:31,443 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-10-11 14:26:31,444 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:26:31" (1/1) ... [2024-10-11 14:26:31,455 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-11 14:26:31,465 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 14:26:31,478 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-10-11 14:26:31,480 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-10-11 14:26:31,513 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-10-11 14:26:31,513 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2024-10-11 14:26:31,513 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2024-10-11 14:26:31,513 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2024-10-11 14:26:31,513 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2024-10-11 14:26:31,514 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2024-10-11 14:26:31,514 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2024-10-11 14:26:31,514 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-10-11 14:26:31,514 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-10-11 14:26:31,514 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-10-11 14:26:31,514 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-10-11 14:26:31,514 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-10-11 14:26:31,514 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-10-11 14:26:31,515 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-10-11 14:26:31,515 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-10-11 14:26:31,515 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-10-11 14:26:31,516 WARN L207 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2024-10-11 14:26:31,600 INFO L238 CfgBuilder]: Building ICFG [2024-10-11 14:26:31,602 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-10-11 14:26:31,939 INFO L283 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2024-10-11 14:26:31,940 INFO L287 CfgBuilder]: Performing block encoding [2024-10-11 14:26:32,238 INFO L309 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-10-11 14:26:32,238 INFO L314 CfgBuilder]: Removed 6 assume(true) statements. [2024-10-11 14:26:32,239 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.10 02:26:32 BoogieIcfgContainer [2024-10-11 14:26:32,239 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-10-11 14:26:32,241 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-10-11 14:26:32,241 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-10-11 14:26:32,243 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-10-11 14:26:32,244 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 11.10 02:26:31" (1/3) ... [2024-10-11 14:26:32,245 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7d915937 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.10 02:26:32, skipping insertion in model container [2024-10-11 14:26:32,245 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:26:31" (2/3) ... [2024-10-11 14:26:32,246 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7d915937 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.10 02:26:32, skipping insertion in model container [2024-10-11 14:26:32,246 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.10 02:26:32" (3/3) ... [2024-10-11 14:26:32,247 INFO L112 eAbstractionObserver]: Analyzing ICFG chl-chromosome-trans.wvr.c [2024-10-11 14:26:32,261 INFO L209 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-10-11 14:26:32,262 INFO L149 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-10-11 14:26:32,262 INFO L484 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-10-11 14:26:32,299 INFO L143 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2024-10-11 14:26:32,327 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 35 places, 31 transitions, 83 flow [2024-10-11 14:26:32,384 INFO L124 PetriNetUnfolderBase]: 6/28 cut-off events. [2024-10-11 14:26:32,384 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2024-10-11 14:26:32,387 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41 conditions, 28 events. 6/28 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 20 event pairs, 0 based on Foata normal form. 0/21 useless extension candidates. Maximal degree in co-relation 21. Up to 2 conditions per place. [2024-10-11 14:26:32,387 INFO L82 GeneralOperation]: Start removeDead. Operand has 35 places, 31 transitions, 83 flow [2024-10-11 14:26:32,390 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 31 places, 27 transitions, 72 flow [2024-10-11 14:26:32,399 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-10-11 14:26:32,405 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;@3fea244c, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-10-11 14:26:32,405 INFO L334 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2024-10-11 14:26:32,418 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-10-11 14:26:32,418 INFO L124 PetriNetUnfolderBase]: 6/26 cut-off events. [2024-10-11 14:26:32,418 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2024-10-11 14:26:32,418 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 14:26:32,419 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 14:26:32,419 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-10-11 14:26:32,423 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 14:26:32,424 INFO L85 PathProgramCache]: Analyzing trace with hash 1325247194, now seen corresponding path program 1 times [2024-10-11 14:26:32,430 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 14:26:32,431 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [226035364] [2024-10-11 14:26:32,431 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 14:26:32,431 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 14:26:32,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 14:26:32,844 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 14:26:32,845 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 14:26:32,845 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [226035364] [2024-10-11 14:26:32,846 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [226035364] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-11 14:26:32,846 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-11 14:26:32,846 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-10-11 14:26:32,847 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [525762028] [2024-10-11 14:26:32,848 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-11 14:26:32,854 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-11 14:26:32,857 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 14:26:32,880 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-11 14:26:32,881 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-11 14:26:32,882 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 31 [2024-10-11 14:26:32,884 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 31 places, 27 transitions, 72 flow. Second operand has 3 states, 3 states have (on average 10.666666666666666) internal successors, (32), 3 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 14:26:32,884 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 14:26:32,885 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 31 [2024-10-11 14:26:32,885 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 14:26:33,019 INFO L124 PetriNetUnfolderBase]: 202/302 cut-off events. [2024-10-11 14:26:33,020 INFO L125 PetriNetUnfolderBase]: For 32/32 co-relation queries the response was YES. [2024-10-11 14:26:33,022 INFO L83 FinitePrefix]: Finished finitePrefix Result has 647 conditions, 302 events. 202/302 cut-off events. For 32/32 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 694 event pairs, 124 based on Foata normal form. 0/224 useless extension candidates. Maximal degree in co-relation 534. Up to 299 conditions per place. [2024-10-11 14:26:33,026 INFO L140 encePairwiseOnDemand]: 24/31 looper letters, 23 selfloop transitions, 6 changer transitions 0/30 dead transitions. [2024-10-11 14:26:33,026 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 33 places, 30 transitions, 136 flow [2024-10-11 14:26:33,027 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-11 14:26:33,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-10-11 14:26:33,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 44 transitions. [2024-10-11 14:26:33,036 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4731182795698925 [2024-10-11 14:26:33,037 INFO L175 Difference]: Start difference. First operand has 31 places, 27 transitions, 72 flow. Second operand 3 states and 44 transitions. [2024-10-11 14:26:33,038 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 33 places, 30 transitions, 136 flow [2024-10-11 14:26:33,041 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 27 places, 30 transitions, 124 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-10-11 14:26:33,043 INFO L231 Difference]: Finished difference. Result has 28 places, 30 transitions, 92 flow [2024-10-11 14:26:33,044 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=60, PETRI_DIFFERENCE_MINUEND_PLACES=25, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=27, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=92, PETRI_PLACES=28, PETRI_TRANSITIONS=30} [2024-10-11 14:26:33,047 INFO L277 CegarLoopForPetriNet]: 31 programPoint places, -3 predicate places. [2024-10-11 14:26:33,048 INFO L471 AbstractCegarLoop]: Abstraction has has 28 places, 30 transitions, 92 flow [2024-10-11 14:26:33,048 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 10.666666666666666) internal successors, (32), 3 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 14:26:33,048 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 14:26:33,048 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 14:26:33,048 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-10-11 14:26:33,048 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-10-11 14:26:33,049 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 14:26:33,049 INFO L85 PathProgramCache]: Analyzing trace with hash -1674808808, now seen corresponding path program 1 times [2024-10-11 14:26:33,050 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 14:26:33,050 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [187489685] [2024-10-11 14:26:33,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 14:26:33,050 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 14:26:33,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 14:26:33,325 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-10-11 14:26:33,325 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 14:26:33,325 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [187489685] [2024-10-11 14:26:33,325 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [187489685] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-11 14:26:33,326 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-11 14:26:33,326 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-10-11 14:26:33,327 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [50725021] [2024-10-11 14:26:33,327 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-11 14:26:33,328 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-10-11 14:26:33,328 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 14:26:33,329 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-10-11 14:26:33,329 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-10-11 14:26:33,329 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 31 [2024-10-11 14:26:33,330 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 28 places, 30 transitions, 92 flow. Second operand has 4 states, 4 states have (on average 9.75) internal successors, (39), 4 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 14:26:33,330 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 14:26:33,330 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 31 [2024-10-11 14:26:33,330 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 14:26:33,467 INFO L124 PetriNetUnfolderBase]: 306/451 cut-off events. [2024-10-11 14:26:33,469 INFO L125 PetriNetUnfolderBase]: For 14/14 co-relation queries the response was YES. [2024-10-11 14:26:33,470 INFO L83 FinitePrefix]: Finished finitePrefix Result has 931 conditions, 451 events. 306/451 cut-off events. For 14/14 co-relation queries the response was YES. Maximal size of possible extension queue 27. Compared 1207 event pairs, 124 based on Foata normal form. 1/328 useless extension candidates. Maximal degree in co-relation 900. Up to 302 conditions per place. [2024-10-11 14:26:33,472 INFO L140 encePairwiseOnDemand]: 28/31 looper letters, 37 selfloop transitions, 2 changer transitions 2/42 dead transitions. [2024-10-11 14:26:33,473 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 30 places, 42 transitions, 201 flow [2024-10-11 14:26:33,473 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-11 14:26:33,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-10-11 14:26:33,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 51 transitions. [2024-10-11 14:26:33,474 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5483870967741935 [2024-10-11 14:26:33,475 INFO L175 Difference]: Start difference. First operand has 28 places, 30 transitions, 92 flow. Second operand 3 states and 51 transitions. [2024-10-11 14:26:33,475 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 30 places, 42 transitions, 201 flow [2024-10-11 14:26:33,476 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 29 places, 42 transitions, 195 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-10-11 14:26:33,477 INFO L231 Difference]: Finished difference. Result has 30 places, 31 transitions, 98 flow [2024-10-11 14:26:33,478 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=86, PETRI_DIFFERENCE_MINUEND_PLACES=27, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=30, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=98, PETRI_PLACES=30, PETRI_TRANSITIONS=31} [2024-10-11 14:26:33,478 INFO L277 CegarLoopForPetriNet]: 31 programPoint places, -1 predicate places. [2024-10-11 14:26:33,478 INFO L471 AbstractCegarLoop]: Abstraction has has 30 places, 31 transitions, 98 flow [2024-10-11 14:26:33,478 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 9.75) internal successors, (39), 4 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 14:26:33,478 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 14:26:33,478 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 14:26:33,479 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-10-11 14:26:33,479 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-10-11 14:26:33,479 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 14:26:33,479 INFO L85 PathProgramCache]: Analyzing trace with hash 278082362, now seen corresponding path program 1 times [2024-10-11 14:26:33,479 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 14:26:33,479 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [688246174] [2024-10-11 14:26:33,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 14:26:33,480 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 14:26:33,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 14:26:33,623 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-10-11 14:26:33,623 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 14:26:33,623 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [688246174] [2024-10-11 14:26:33,623 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [688246174] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-11 14:26:33,623 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1996755179] [2024-10-11 14:26:33,623 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 14:26:33,624 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 14:26:33,624 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 14:26:33,626 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-11 14:26:33,635 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-10-11 14:26:33,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 14:26:33,770 INFO L255 TraceCheckSpWp]: Trace formula consists of 294 conjuncts, 5 conjuncts are in the unsatisfiable core [2024-10-11 14:26:33,775 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 14:26:33,824 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-10-11 14:26:33,824 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-11 14:26:33,853 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-10-11 14:26:33,853 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1996755179] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-11 14:26:33,853 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-11 14:26:33,853 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 3, 3] total 8 [2024-10-11 14:26:33,853 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1889074861] [2024-10-11 14:26:33,854 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-11 14:26:33,854 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-10-11 14:26:33,854 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 14:26:33,855 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-10-11 14:26:33,855 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=29, Unknown=0, NotChecked=0, Total=56 [2024-10-11 14:26:33,855 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 31 [2024-10-11 14:26:33,855 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 30 places, 31 transitions, 98 flow. Second operand has 8 states, 8 states have (on average 8.0) internal successors, (64), 8 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 14:26:33,855 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 14:26:33,855 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 31 [2024-10-11 14:26:33,855 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 14:26:33,995 INFO L124 PetriNetUnfolderBase]: 306/460 cut-off events. [2024-10-11 14:26:33,995 INFO L125 PetriNetUnfolderBase]: For 74/74 co-relation queries the response was YES. [2024-10-11 14:26:33,996 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1045 conditions, 460 events. 306/460 cut-off events. For 74/74 co-relation queries the response was YES. Maximal size of possible extension queue 27. Compared 1191 event pairs, 202 based on Foata normal form. 0/378 useless extension candidates. Maximal degree in co-relation 983. Up to 448 conditions per place. [2024-10-11 14:26:33,997 INFO L140 encePairwiseOnDemand]: 24/31 looper letters, 24 selfloop transitions, 15 changer transitions 0/40 dead transitions. [2024-10-11 14:26:33,998 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 35 places, 40 transitions, 212 flow [2024-10-11 14:26:33,999 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-10-11 14:26:33,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-10-11 14:26:34,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 71 transitions. [2024-10-11 14:26:34,001 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.3817204301075269 [2024-10-11 14:26:34,001 INFO L175 Difference]: Start difference. First operand has 30 places, 31 transitions, 98 flow. Second operand 6 states and 71 transitions. [2024-10-11 14:26:34,001 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 35 places, 40 transitions, 212 flow [2024-10-11 14:26:34,002 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 34 places, 40 transitions, 210 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-10-11 14:26:34,003 INFO L231 Difference]: Finished difference. Result has 37 places, 40 transitions, 192 flow [2024-10-11 14:26:34,003 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=96, PETRI_DIFFERENCE_MINUEND_PLACES=29, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=31, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=192, PETRI_PLACES=37, PETRI_TRANSITIONS=40} [2024-10-11 14:26:34,005 INFO L277 CegarLoopForPetriNet]: 31 programPoint places, 6 predicate places. [2024-10-11 14:26:34,005 INFO L471 AbstractCegarLoop]: Abstraction has has 37 places, 40 transitions, 192 flow [2024-10-11 14:26:34,006 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.0) internal successors, (64), 8 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 14:26:34,006 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 14:26:34,006 INFO L204 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 14:26:34,019 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-10-11 14:26:34,210 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 14:26:34,211 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-10-11 14:26:34,211 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 14:26:34,211 INFO L85 PathProgramCache]: Analyzing trace with hash -2130876906, now seen corresponding path program 2 times [2024-10-11 14:26:34,212 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 14:26:34,212 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1369626429] [2024-10-11 14:26:34,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 14:26:34,213 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 14:26:34,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 14:26:34,391 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2024-10-11 14:26:34,391 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 14:26:34,391 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1369626429] [2024-10-11 14:26:34,391 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1369626429] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-11 14:26:34,391 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2080110382] [2024-10-11 14:26:34,392 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-11 14:26:34,392 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 14:26:34,392 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 14:26:34,393 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-11 14:26:34,396 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-10-11 14:26:34,507 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2024-10-11 14:26:34,508 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-11 14:26:34,509 INFO L255 TraceCheckSpWp]: Trace formula consists of 252 conjuncts, 5 conjuncts are in the unsatisfiable core [2024-10-11 14:26:34,511 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 14:26:34,651 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2024-10-11 14:26:34,651 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-10-11 14:26:34,651 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2080110382] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-11 14:26:34,651 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-10-11 14:26:34,651 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [7] total 9 [2024-10-11 14:26:34,652 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1295180127] [2024-10-11 14:26:34,652 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-11 14:26:34,652 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-10-11 14:26:34,652 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 14:26:34,652 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-10-11 14:26:34,653 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2024-10-11 14:26:34,653 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 31 [2024-10-11 14:26:34,653 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 37 places, 40 transitions, 192 flow. Second operand has 4 states, 4 states have (on average 10.0) internal successors, (40), 4 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 14:26:34,653 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 14:26:34,653 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 31 [2024-10-11 14:26:34,653 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 14:26:34,796 INFO L124 PetriNetUnfolderBase]: 502/756 cut-off events. [2024-10-11 14:26:34,797 INFO L125 PetriNetUnfolderBase]: For 85/85 co-relation queries the response was YES. [2024-10-11 14:26:34,798 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1704 conditions, 756 events. 502/756 cut-off events. For 85/85 co-relation queries the response was YES. Maximal size of possible extension queue 42. Compared 2523 event pairs, 202 based on Foata normal form. 17/625 useless extension candidates. Maximal degree in co-relation 1615. Up to 460 conditions per place. [2024-10-11 14:26:34,800 INFO L140 encePairwiseOnDemand]: 27/31 looper letters, 63 selfloop transitions, 3 changer transitions 2/69 dead transitions. [2024-10-11 14:26:34,800 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 40 places, 69 transitions, 407 flow [2024-10-11 14:26:34,800 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-10-11 14:26:34,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-10-11 14:26:34,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 70 transitions. [2024-10-11 14:26:34,801 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5645161290322581 [2024-10-11 14:26:34,802 INFO L175 Difference]: Start difference. First operand has 37 places, 40 transitions, 192 flow. Second operand 4 states and 70 transitions. [2024-10-11 14:26:34,802 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 40 places, 69 transitions, 407 flow [2024-10-11 14:26:34,804 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 39 places, 69 transitions, 383 flow, removed 9 selfloop flow, removed 1 redundant places. [2024-10-11 14:26:34,805 INFO L231 Difference]: Finished difference. Result has 41 places, 42 transitions, 188 flow [2024-10-11 14:26:34,805 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=168, PETRI_DIFFERENCE_MINUEND_PLACES=36, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=188, PETRI_PLACES=41, PETRI_TRANSITIONS=42} [2024-10-11 14:26:34,805 INFO L277 CegarLoopForPetriNet]: 31 programPoint places, 10 predicate places. [2024-10-11 14:26:34,806 INFO L471 AbstractCegarLoop]: Abstraction has has 41 places, 42 transitions, 188 flow [2024-10-11 14:26:34,806 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 10.0) internal successors, (40), 4 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 14:26:34,806 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 14:26:34,806 INFO L204 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 14:26:34,821 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-10-11 14:26:35,007 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 14:26:35,008 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-10-11 14:26:35,008 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 14:26:35,008 INFO L85 PathProgramCache]: Analyzing trace with hash 714235528, now seen corresponding path program 3 times [2024-10-11 14:26:35,008 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 14:26:35,008 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [875719159] [2024-10-11 14:26:35,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 14:26:35,009 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 14:26:35,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 14:26:35,123 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2024-10-11 14:26:35,123 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 14:26:35,124 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [875719159] [2024-10-11 14:26:35,124 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [875719159] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-11 14:26:35,124 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [826644776] [2024-10-11 14:26:35,124 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-10-11 14:26:35,124 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 14:26:35,124 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 14:26:35,126 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-11 14:26:35,130 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-10-11 14:26:35,242 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2024-10-11 14:26:35,243 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-11 14:26:35,244 INFO L255 TraceCheckSpWp]: Trace formula consists of 252 conjuncts, 5 conjuncts are in the unsatisfiable core [2024-10-11 14:26:35,245 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 14:26:35,275 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2024-10-11 14:26:35,275 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-10-11 14:26:35,276 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [826644776] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-11 14:26:35,276 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-10-11 14:26:35,276 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 9 [2024-10-11 14:26:35,276 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [520585462] [2024-10-11 14:26:35,276 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-11 14:26:35,276 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-10-11 14:26:35,277 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 14:26:35,277 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-10-11 14:26:35,277 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2024-10-11 14:26:35,277 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 31 [2024-10-11 14:26:35,278 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 42 transitions, 188 flow. Second operand has 4 states, 4 states have (on average 10.0) internal successors, (40), 4 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 14:26:35,278 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 14:26:35,278 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 31 [2024-10-11 14:26:35,278 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 14:26:35,418 INFO L124 PetriNetUnfolderBase]: 560/838 cut-off events. [2024-10-11 14:26:35,418 INFO L125 PetriNetUnfolderBase]: For 440/440 co-relation queries the response was YES. [2024-10-11 14:26:35,419 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2240 conditions, 838 events. 560/838 cut-off events. For 440/440 co-relation queries the response was YES. Maximal size of possible extension queue 47. Compared 2952 event pairs, 97 based on Foata normal form. 24/740 useless extension candidates. Maximal degree in co-relation 2160. Up to 567 conditions per place. [2024-10-11 14:26:35,421 INFO L140 encePairwiseOnDemand]: 25/31 looper letters, 58 selfloop transitions, 5 changer transitions 1/65 dead transitions. [2024-10-11 14:26:35,421 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 65 transitions, 394 flow [2024-10-11 14:26:35,421 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-10-11 14:26:35,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-10-11 14:26:35,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 62 transitions. [2024-10-11 14:26:35,422 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5 [2024-10-11 14:26:35,422 INFO L175 Difference]: Start difference. First operand has 41 places, 42 transitions, 188 flow. Second operand 4 states and 62 transitions. [2024-10-11 14:26:35,422 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 65 transitions, 394 flow [2024-10-11 14:26:35,424 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 43 places, 65 transitions, 383 flow, removed 3 selfloop flow, removed 1 redundant places. [2024-10-11 14:26:35,424 INFO L231 Difference]: Finished difference. Result has 45 places, 44 transitions, 213 flow [2024-10-11 14:26:35,425 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=184, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=213, PETRI_PLACES=45, PETRI_TRANSITIONS=44} [2024-10-11 14:26:35,425 INFO L277 CegarLoopForPetriNet]: 31 programPoint places, 14 predicate places. [2024-10-11 14:26:35,425 INFO L471 AbstractCegarLoop]: Abstraction has has 45 places, 44 transitions, 213 flow [2024-10-11 14:26:35,425 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 10.0) internal successors, (40), 4 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 14:26:35,426 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 14:26:35,426 INFO L204 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 14:26:35,441 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2024-10-11 14:26:35,629 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 14:26:35,630 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-10-11 14:26:35,630 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 14:26:35,630 INFO L85 PathProgramCache]: Analyzing trace with hash 929144618, now seen corresponding path program 4 times [2024-10-11 14:26:35,631 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 14:26:35,631 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [204386416] [2024-10-11 14:26:35,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 14:26:35,631 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 14:26:35,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 14:26:35,781 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2024-10-11 14:26:35,782 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 14:26:35,783 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [204386416] [2024-10-11 14:26:35,783 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [204386416] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-11 14:26:35,783 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1297639354] [2024-10-11 14:26:35,783 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-10-11 14:26:35,783 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 14:26:35,783 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 14:26:35,785 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-11 14:26:35,786 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-10-11 14:26:35,900 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-10-11 14:26:35,900 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-11 14:26:35,902 INFO L255 TraceCheckSpWp]: Trace formula consists of 375 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-10-11 14:26:35,905 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 14:26:35,980 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2024-10-11 14:26:35,981 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-11 14:26:36,061 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2024-10-11 14:26:36,062 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1297639354] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-11 14:26:36,062 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-11 14:26:36,062 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 17 [2024-10-11 14:26:36,062 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1654709308] [2024-10-11 14:26:36,062 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-11 14:26:36,063 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-10-11 14:26:36,064 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 14:26:36,064 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-10-11 14:26:36,065 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=166, Unknown=0, NotChecked=0, Total=272 [2024-10-11 14:26:36,065 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 31 [2024-10-11 14:26:36,065 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 44 transitions, 213 flow. Second operand has 17 states, 17 states have (on average 6.411764705882353) internal successors, (109), 17 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 14:26:36,065 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 14:26:36,065 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 31 [2024-10-11 14:26:36,065 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 14:26:36,229 INFO L124 PetriNetUnfolderBase]: 560/841 cut-off events. [2024-10-11 14:26:36,229 INFO L125 PetriNetUnfolderBase]: For 915/915 co-relation queries the response was YES. [2024-10-11 14:26:36,232 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2372 conditions, 841 events. 560/841 cut-off events. For 915/915 co-relation queries the response was YES. Maximal size of possible extension queue 48. Compared 2692 event pairs, 371 based on Foata normal form. 1/720 useless extension candidates. Maximal degree in co-relation 2277. Up to 825 conditions per place. [2024-10-11 14:26:36,235 INFO L140 encePairwiseOnDemand]: 24/31 looper letters, 28 selfloop transitions, 18 changer transitions 0/47 dead transitions. [2024-10-11 14:26:36,235 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 51 places, 47 transitions, 323 flow [2024-10-11 14:26:36,235 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-10-11 14:26:36,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-10-11 14:26:36,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 72 transitions. [2024-10-11 14:26:36,235 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.3317972350230415 [2024-10-11 14:26:36,236 INFO L175 Difference]: Start difference. First operand has 45 places, 44 transitions, 213 flow. Second operand 7 states and 72 transitions. [2024-10-11 14:26:36,236 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 51 places, 47 transitions, 323 flow [2024-10-11 14:26:36,237 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 47 transitions, 320 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-10-11 14:26:36,238 INFO L231 Difference]: Finished difference. Result has 51 places, 47 transitions, 278 flow [2024-10-11 14:26:36,240 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=210, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=278, PETRI_PLACES=51, PETRI_TRANSITIONS=47} [2024-10-11 14:26:36,241 INFO L277 CegarLoopForPetriNet]: 31 programPoint places, 20 predicate places. [2024-10-11 14:26:36,241 INFO L471 AbstractCegarLoop]: Abstraction has has 51 places, 47 transitions, 278 flow [2024-10-11 14:26:36,241 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 6.411764705882353) internal successors, (109), 17 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 14:26:36,241 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 14:26:36,241 INFO L204 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 14:26:36,262 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2024-10-11 14:26:36,441 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2024-10-11 14:26:36,442 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-10-11 14:26:36,442 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 14:26:36,442 INFO L85 PathProgramCache]: Analyzing trace with hash 549347966, now seen corresponding path program 5 times [2024-10-11 14:26:36,442 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 14:26:36,442 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2024480185] [2024-10-11 14:26:36,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 14:26:36,442 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 14:26:36,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 14:26:36,745 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2024-10-11 14:26:36,746 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 14:26:36,746 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2024480185] [2024-10-11 14:26:36,746 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2024480185] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-11 14:26:36,746 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-11 14:26:36,746 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-10-11 14:26:36,746 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1468900504] [2024-10-11 14:26:36,746 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-11 14:26:36,747 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-10-11 14:26:36,747 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 14:26:36,747 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-10-11 14:26:36,747 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-10-11 14:26:36,747 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 31 [2024-10-11 14:26:36,747 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 47 transitions, 278 flow. Second operand has 5 states, 5 states have (on average 8.8) internal successors, (44), 5 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 14:26:36,748 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 14:26:36,748 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 31 [2024-10-11 14:26:36,748 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 14:26:37,015 INFO L124 PetriNetUnfolderBase]: 986/1483 cut-off events. [2024-10-11 14:26:37,015 INFO L125 PetriNetUnfolderBase]: For 1263/1263 co-relation queries the response was YES. [2024-10-11 14:26:37,017 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4091 conditions, 1483 events. 986/1483 cut-off events. For 1263/1263 co-relation queries the response was YES. Maximal size of possible extension queue 87. Compared 5997 event pairs, 359 based on Foata normal form. 16/1269 useless extension candidates. Maximal degree in co-relation 3976. Up to 869 conditions per place. [2024-10-11 14:26:37,021 INFO L140 encePairwiseOnDemand]: 26/31 looper letters, 73 selfloop transitions, 3 changer transitions 14/91 dead transitions. [2024-10-11 14:26:37,021 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 91 transitions, 635 flow [2024-10-11 14:26:37,022 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-10-11 14:26:37,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-10-11 14:26:37,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 80 transitions. [2024-10-11 14:26:37,022 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5161290322580645 [2024-10-11 14:26:37,022 INFO L175 Difference]: Start difference. First operand has 51 places, 47 transitions, 278 flow. Second operand 5 states and 80 transitions. [2024-10-11 14:26:37,022 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 91 transitions, 635 flow [2024-10-11 14:26:37,024 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 91 transitions, 599 flow, removed 6 selfloop flow, removed 4 redundant places. [2024-10-11 14:26:37,025 INFO L231 Difference]: Finished difference. Result has 54 places, 49 transitions, 264 flow [2024-10-11 14:26:37,026 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=242, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=264, PETRI_PLACES=54, PETRI_TRANSITIONS=49} [2024-10-11 14:26:37,026 INFO L277 CegarLoopForPetriNet]: 31 programPoint places, 23 predicate places. [2024-10-11 14:26:37,026 INFO L471 AbstractCegarLoop]: Abstraction has has 54 places, 49 transitions, 264 flow [2024-10-11 14:26:37,026 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 8.8) internal successors, (44), 5 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 14:26:37,027 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 14:26:37,027 INFO L204 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 14:26:37,027 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-10-11 14:26:37,027 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-10-11 14:26:37,027 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 14:26:37,027 INFO L85 PathProgramCache]: Analyzing trace with hash -624485794, now seen corresponding path program 6 times [2024-10-11 14:26:37,028 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 14:26:37,028 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1823193805] [2024-10-11 14:26:37,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 14:26:37,028 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 14:26:37,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 14:26:37,234 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2024-10-11 14:26:37,234 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 14:26:37,234 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1823193805] [2024-10-11 14:26:37,234 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1823193805] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-11 14:26:37,234 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-11 14:26:37,234 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-10-11 14:26:37,234 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1838842682] [2024-10-11 14:26:37,234 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-11 14:26:37,235 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-10-11 14:26:37,235 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 14:26:37,235 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-10-11 14:26:37,235 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-10-11 14:26:37,235 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 31 [2024-10-11 14:26:37,235 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 49 transitions, 264 flow. Second operand has 4 states, 4 states have (on average 10.0) internal successors, (40), 4 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 14:26:37,235 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 14:26:37,235 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 31 [2024-10-11 14:26:37,235 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 14:26:37,448 INFO L124 PetriNetUnfolderBase]: 780/1157 cut-off events. [2024-10-11 14:26:37,448 INFO L125 PetriNetUnfolderBase]: For 1701/1701 co-relation queries the response was YES. [2024-10-11 14:26:37,450 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3726 conditions, 1157 events. 780/1157 cut-off events. For 1701/1701 co-relation queries the response was YES. Maximal size of possible extension queue 64. Compared 4257 event pairs, 306 based on Foata normal form. 48/1078 useless extension candidates. Maximal degree in co-relation 3625. Up to 792 conditions per place. [2024-10-11 14:26:37,453 INFO L140 encePairwiseOnDemand]: 27/31 looper letters, 67 selfloop transitions, 6 changer transitions 2/76 dead transitions. [2024-10-11 14:26:37,453 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 76 transitions, 523 flow [2024-10-11 14:26:37,453 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-10-11 14:26:37,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-10-11 14:26:37,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 66 transitions. [2024-10-11 14:26:37,454 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.532258064516129 [2024-10-11 14:26:37,454 INFO L175 Difference]: Start difference. First operand has 54 places, 49 transitions, 264 flow. Second operand 4 states and 66 transitions. [2024-10-11 14:26:37,454 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 76 transitions, 523 flow [2024-10-11 14:26:37,456 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 76 transitions, 506 flow, removed 6 selfloop flow, removed 2 redundant places. [2024-10-11 14:26:37,457 INFO L231 Difference]: Finished difference. Result has 55 places, 50 transitions, 281 flow [2024-10-11 14:26:37,457 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=258, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=281, PETRI_PLACES=55, PETRI_TRANSITIONS=50} [2024-10-11 14:26:37,457 INFO L277 CegarLoopForPetriNet]: 31 programPoint places, 24 predicate places. [2024-10-11 14:26:37,457 INFO L471 AbstractCegarLoop]: Abstraction has has 55 places, 50 transitions, 281 flow [2024-10-11 14:26:37,458 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 10.0) internal successors, (40), 4 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 14:26:37,458 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 14:26:37,458 INFO L204 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 14:26:37,458 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-10-11 14:26:37,458 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-10-11 14:26:37,458 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 14:26:37,458 INFO L85 PathProgramCache]: Analyzing trace with hash -745873431, now seen corresponding path program 1 times [2024-10-11 14:26:37,458 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 14:26:37,458 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1555956129] [2024-10-11 14:26:37,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 14:26:37,458 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 14:26:37,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 14:26:37,738 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2024-10-11 14:26:37,738 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 14:26:37,738 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1555956129] [2024-10-11 14:26:37,738 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1555956129] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-11 14:26:37,738 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-11 14:26:37,738 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-10-11 14:26:37,738 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1176948954] [2024-10-11 14:26:37,739 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-11 14:26:37,739 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-10-11 14:26:37,739 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 14:26:37,739 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-10-11 14:26:37,739 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-10-11 14:26:37,739 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 31 [2024-10-11 14:26:37,739 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 50 transitions, 281 flow. Second operand has 5 states, 5 states have (on average 9.0) internal successors, (45), 5 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 14:26:37,739 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 14:26:37,739 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 31 [2024-10-11 14:26:37,740 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 14:26:38,056 INFO L124 PetriNetUnfolderBase]: 952/1406 cut-off events. [2024-10-11 14:26:38,056 INFO L125 PetriNetUnfolderBase]: For 2545/2545 co-relation queries the response was YES. [2024-10-11 14:26:38,059 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4581 conditions, 1406 events. 952/1406 cut-off events. For 2545/2545 co-relation queries the response was YES. Maximal size of possible extension queue 88. Compared 5444 event pairs, 267 based on Foata normal form. 24/1287 useless extension candidates. Maximal degree in co-relation 4480. Up to 728 conditions per place. [2024-10-11 14:26:38,063 INFO L140 encePairwiseOnDemand]: 26/31 looper letters, 82 selfloop transitions, 6 changer transitions 0/89 dead transitions. [2024-10-11 14:26:38,063 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 89 transitions, 635 flow [2024-10-11 14:26:38,063 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-10-11 14:26:38,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-10-11 14:26:38,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 80 transitions. [2024-10-11 14:26:38,064 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5161290322580645 [2024-10-11 14:26:38,064 INFO L175 Difference]: Start difference. First operand has 55 places, 50 transitions, 281 flow. Second operand 5 states and 80 transitions. [2024-10-11 14:26:38,064 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 89 transitions, 635 flow [2024-10-11 14:26:38,066 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 89 transitions, 595 flow, removed 6 selfloop flow, removed 3 redundant places. [2024-10-11 14:26:38,067 INFO L231 Difference]: Finished difference. Result has 58 places, 53 transitions, 307 flow [2024-10-11 14:26:38,067 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=265, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=307, PETRI_PLACES=58, PETRI_TRANSITIONS=53} [2024-10-11 14:26:38,068 INFO L277 CegarLoopForPetriNet]: 31 programPoint places, 27 predicate places. [2024-10-11 14:26:38,068 INFO L471 AbstractCegarLoop]: Abstraction has has 58 places, 53 transitions, 307 flow [2024-10-11 14:26:38,068 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 9.0) internal successors, (45), 5 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 14:26:38,068 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 14:26:38,068 INFO L204 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 14:26:38,068 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-10-11 14:26:38,068 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-10-11 14:26:38,068 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 14:26:38,069 INFO L85 PathProgramCache]: Analyzing trace with hash 1741191669, now seen corresponding path program 2 times [2024-10-11 14:26:38,069 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 14:26:38,069 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1157855644] [2024-10-11 14:26:38,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 14:26:38,069 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 14:26:38,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 14:26:38,288 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2024-10-11 14:26:38,289 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 14:26:38,289 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1157855644] [2024-10-11 14:26:38,289 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1157855644] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-11 14:26:38,289 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1846012189] [2024-10-11 14:26:38,289 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-11 14:26:38,290 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 14:26:38,290 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 14:26:38,291 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-11 14:26:38,292 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-10-11 14:26:38,412 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-11 14:26:38,412 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-11 14:26:38,414 INFO L255 TraceCheckSpWp]: Trace formula consists of 417 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-10-11 14:26:38,415 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 14:26:38,478 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2024-10-11 14:26:38,478 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-11 14:26:38,528 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2024-10-11 14:26:38,529 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1846012189] provided 1 perfect and 1 imperfect interpolant sequences [2024-10-11 14:26:38,529 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-10-11 14:26:38,530 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5, 5] total 8 [2024-10-11 14:26:38,530 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1651846695] [2024-10-11 14:26:38,530 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-11 14:26:38,530 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-10-11 14:26:38,531 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 14:26:38,531 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-10-11 14:26:38,531 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-10-11 14:26:38,532 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 31 [2024-10-11 14:26:38,532 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 53 transitions, 307 flow. Second operand has 5 states, 5 states have (on average 9.0) internal successors, (45), 5 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 14:26:38,532 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 14:26:38,532 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 31 [2024-10-11 14:26:38,532 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 14:26:38,834 INFO L124 PetriNetUnfolderBase]: 1006/1482 cut-off events. [2024-10-11 14:26:38,835 INFO L125 PetriNetUnfolderBase]: For 2857/2857 co-relation queries the response was YES. [2024-10-11 14:26:38,838 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5106 conditions, 1482 events. 1006/1482 cut-off events. For 2857/2857 co-relation queries the response was YES. Maximal size of possible extension queue 94. Compared 5652 event pairs, 158 based on Foata normal form. 22/1357 useless extension candidates. Maximal degree in co-relation 5003. Up to 615 conditions per place. [2024-10-11 14:26:38,842 INFO L140 encePairwiseOnDemand]: 24/31 looper letters, 86 selfloop transitions, 8 changer transitions 4/99 dead transitions. [2024-10-11 14:26:38,843 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 99 transitions, 747 flow [2024-10-11 14:26:38,843 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-10-11 14:26:38,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-10-11 14:26:38,843 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 76 transitions. [2024-10-11 14:26:38,844 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.49032258064516127 [2024-10-11 14:26:38,844 INFO L175 Difference]: Start difference. First operand has 58 places, 53 transitions, 307 flow. Second operand 5 states and 76 transitions. [2024-10-11 14:26:38,844 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 99 transitions, 747 flow [2024-10-11 14:26:38,847 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 99 transitions, 735 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-10-11 14:26:38,848 INFO L231 Difference]: Finished difference. Result has 63 places, 56 transitions, 361 flow [2024-10-11 14:26:38,848 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=303, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=53, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=361, PETRI_PLACES=63, PETRI_TRANSITIONS=56} [2024-10-11 14:26:38,849 INFO L277 CegarLoopForPetriNet]: 31 programPoint places, 32 predicate places. [2024-10-11 14:26:38,849 INFO L471 AbstractCegarLoop]: Abstraction has has 63 places, 56 transitions, 361 flow [2024-10-11 14:26:38,849 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 9.0) internal successors, (45), 5 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 14:26:38,849 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 14:26:38,849 INFO L204 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 14:26:38,862 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-10-11 14:26:39,050 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2024-10-11 14:26:39,050 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-10-11 14:26:39,050 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 14:26:39,050 INFO L85 PathProgramCache]: Analyzing trace with hash 936504855, now seen corresponding path program 3 times [2024-10-11 14:26:39,051 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 14:26:39,051 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1403310642] [2024-10-11 14:26:39,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 14:26:39,051 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 14:26:39,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 14:26:39,280 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2024-10-11 14:26:39,280 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 14:26:39,280 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1403310642] [2024-10-11 14:26:39,280 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1403310642] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-11 14:26:39,280 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-11 14:26:39,281 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-10-11 14:26:39,281 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1712255131] [2024-10-11 14:26:39,281 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-11 14:26:39,281 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-10-11 14:26:39,281 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 14:26:39,281 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-10-11 14:26:39,282 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-10-11 14:26:39,282 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 31 [2024-10-11 14:26:39,282 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 56 transitions, 361 flow. Second operand has 5 states, 5 states have (on average 9.0) internal successors, (45), 5 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 14:26:39,282 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 14:26:39,282 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 31 [2024-10-11 14:26:39,282 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 14:26:39,662 INFO L124 PetriNetUnfolderBase]: 962/1411 cut-off events. [2024-10-11 14:26:39,662 INFO L125 PetriNetUnfolderBase]: For 3388/3388 co-relation queries the response was YES. [2024-10-11 14:26:39,669 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5072 conditions, 1411 events. 962/1411 cut-off events. For 3388/3388 co-relation queries the response was YES. Maximal size of possible extension queue 89. Compared 5353 event pairs, 285 based on Foata normal form. 22/1290 useless extension candidates. Maximal degree in co-relation 4966. Up to 750 conditions per place. [2024-10-11 14:26:39,679 INFO L140 encePairwiseOnDemand]: 26/31 looper letters, 77 selfloop transitions, 10 changer transitions 4/92 dead transitions. [2024-10-11 14:26:39,679 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 92 transitions, 697 flow [2024-10-11 14:26:39,680 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-10-11 14:26:39,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-10-11 14:26:39,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 81 transitions. [2024-10-11 14:26:39,680 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5225806451612903 [2024-10-11 14:26:39,680 INFO L175 Difference]: Start difference. First operand has 63 places, 56 transitions, 361 flow. Second operand 5 states and 81 transitions. [2024-10-11 14:26:39,680 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 92 transitions, 697 flow [2024-10-11 14:26:39,687 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 92 transitions, 682 flow, removed 3 selfloop flow, removed 2 redundant places. [2024-10-11 14:26:39,688 INFO L231 Difference]: Finished difference. Result has 66 places, 57 transitions, 379 flow [2024-10-11 14:26:39,689 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=352, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=56, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=379, PETRI_PLACES=66, PETRI_TRANSITIONS=57} [2024-10-11 14:26:39,689 INFO L277 CegarLoopForPetriNet]: 31 programPoint places, 35 predicate places. [2024-10-11 14:26:39,693 INFO L471 AbstractCegarLoop]: Abstraction has has 66 places, 57 transitions, 379 flow [2024-10-11 14:26:39,693 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 9.0) internal successors, (45), 5 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 14:26:39,693 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 14:26:39,693 INFO L204 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 14:26:39,693 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-10-11 14:26:39,693 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-10-11 14:26:39,694 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 14:26:39,694 INFO L85 PathProgramCache]: Analyzing trace with hash -842471149, now seen corresponding path program 4 times [2024-10-11 14:26:39,694 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 14:26:39,694 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1026630696] [2024-10-11 14:26:39,694 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 14:26:39,694 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 14:26:39,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 14:26:39,941 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2024-10-11 14:26:39,941 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 14:26:39,941 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1026630696] [2024-10-11 14:26:39,942 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1026630696] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-11 14:26:39,942 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-11 14:26:39,942 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-10-11 14:26:39,942 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [54218648] [2024-10-11 14:26:39,942 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-11 14:26:39,942 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-10-11 14:26:39,942 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 14:26:39,942 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-10-11 14:26:39,942 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-10-11 14:26:39,943 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 31 [2024-10-11 14:26:39,943 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 57 transitions, 379 flow. Second operand has 5 states, 5 states have (on average 9.0) internal successors, (45), 5 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 14:26:39,943 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 14:26:39,943 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 31 [2024-10-11 14:26:39,943 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 14:26:40,266 INFO L124 PetriNetUnfolderBase]: 894/1318 cut-off events. [2024-10-11 14:26:40,266 INFO L125 PetriNetUnfolderBase]: For 3649/3649 co-relation queries the response was YES. [2024-10-11 14:26:40,269 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4880 conditions, 1318 events. 894/1318 cut-off events. For 3649/3649 co-relation queries the response was YES. Maximal size of possible extension queue 81. Compared 4807 event pairs, 240 based on Foata normal form. 24/1203 useless extension candidates. Maximal degree in co-relation 4773. Up to 753 conditions per place. [2024-10-11 14:26:40,274 INFO L140 encePairwiseOnDemand]: 26/31 looper letters, 90 selfloop transitions, 10 changer transitions 15/116 dead transitions. [2024-10-11 14:26:40,274 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 116 transitions, 895 flow [2024-10-11 14:26:40,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-10-11 14:26:40,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-10-11 14:26:40,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 103 transitions. [2024-10-11 14:26:40,276 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.47465437788018433 [2024-10-11 14:26:40,276 INFO L175 Difference]: Start difference. First operand has 66 places, 57 transitions, 379 flow. Second operand 7 states and 103 transitions. [2024-10-11 14:26:40,276 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 116 transitions, 895 flow [2024-10-11 14:26:40,280 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 116 transitions, 861 flow, removed 4 selfloop flow, removed 4 redundant places. [2024-10-11 14:26:40,282 INFO L231 Difference]: Finished difference. Result has 69 places, 62 transitions, 436 flow [2024-10-11 14:26:40,282 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=355, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=57, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=436, PETRI_PLACES=69, PETRI_TRANSITIONS=62} [2024-10-11 14:26:40,283 INFO L277 CegarLoopForPetriNet]: 31 programPoint places, 38 predicate places. [2024-10-11 14:26:40,283 INFO L471 AbstractCegarLoop]: Abstraction has has 69 places, 62 transitions, 436 flow [2024-10-11 14:26:40,283 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 9.0) internal successors, (45), 5 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 14:26:40,283 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 14:26:40,283 INFO L204 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 14:26:40,283 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-10-11 14:26:40,285 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-10-11 14:26:40,286 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 14:26:40,286 INFO L85 PathProgramCache]: Analyzing trace with hash -891836861, now seen corresponding path program 5 times [2024-10-11 14:26:40,286 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 14:26:40,286 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [981887992] [2024-10-11 14:26:40,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 14:26:40,286 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 14:26:40,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 14:26:40,518 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2024-10-11 14:26:40,518 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 14:26:40,518 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [981887992] [2024-10-11 14:26:40,518 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [981887992] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-11 14:26:40,518 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-11 14:26:40,518 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-10-11 14:26:40,518 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1433457805] [2024-10-11 14:26:40,518 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-11 14:26:40,518 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-10-11 14:26:40,519 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 14:26:40,519 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-10-11 14:26:40,519 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-10-11 14:26:40,519 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 31 [2024-10-11 14:26:40,519 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 62 transitions, 436 flow. Second operand has 5 states, 5 states have (on average 9.0) internal successors, (45), 5 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 14:26:40,519 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 14:26:40,519 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 31 [2024-10-11 14:26:40,519 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 14:26:40,749 INFO L124 PetriNetUnfolderBase]: 770/1120 cut-off events. [2024-10-11 14:26:40,749 INFO L125 PetriNetUnfolderBase]: For 3112/3112 co-relation queries the response was YES. [2024-10-11 14:26:40,752 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4166 conditions, 1120 events. 770/1120 cut-off events. For 3112/3112 co-relation queries the response was YES. Maximal size of possible extension queue 68. Compared 3867 event pairs, 216 based on Foata normal form. 22/1015 useless extension candidates. Maximal degree in co-relation 4058. Up to 695 conditions per place. [2024-10-11 14:26:40,759 INFO L140 encePairwiseOnDemand]: 26/31 looper letters, 79 selfloop transitions, 9 changer transitions 3/92 dead transitions. [2024-10-11 14:26:40,759 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 92 transitions, 736 flow [2024-10-11 14:26:40,760 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-10-11 14:26:40,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-10-11 14:26:40,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 75 transitions. [2024-10-11 14:26:40,760 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4838709677419355 [2024-10-11 14:26:40,760 INFO L175 Difference]: Start difference. First operand has 69 places, 62 transitions, 436 flow. Second operand 5 states and 75 transitions. [2024-10-11 14:26:40,760 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 92 transitions, 736 flow [2024-10-11 14:26:40,765 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 92 transitions, 700 flow, removed 8 selfloop flow, removed 5 redundant places. [2024-10-11 14:26:40,766 INFO L231 Difference]: Finished difference. Result has 65 places, 61 transitions, 407 flow [2024-10-11 14:26:40,766 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=389, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=61, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=407, PETRI_PLACES=65, PETRI_TRANSITIONS=61} [2024-10-11 14:26:40,767 INFO L277 CegarLoopForPetriNet]: 31 programPoint places, 34 predicate places. [2024-10-11 14:26:40,767 INFO L471 AbstractCegarLoop]: Abstraction has has 65 places, 61 transitions, 407 flow [2024-10-11 14:26:40,767 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 9.0) internal successors, (45), 5 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 14:26:40,767 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 14:26:40,767 INFO L204 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 14:26:40,767 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-10-11 14:26:40,767 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-10-11 14:26:40,768 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 14:26:40,768 INFO L85 PathProgramCache]: Analyzing trace with hash 748145069, now seen corresponding path program 1 times [2024-10-11 14:26:40,768 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 14:26:40,768 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [628402616] [2024-10-11 14:26:40,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 14:26:40,768 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 14:26:40,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 14:26:41,942 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2024-10-11 14:26:41,943 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 14:26:41,943 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [628402616] [2024-10-11 14:26:41,943 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [628402616] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-11 14:26:41,944 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [452621255] [2024-10-11 14:26:41,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 14:26:41,945 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 14:26:41,945 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 14:26:41,946 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-11 14:26:41,949 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-10-11 14:26:42,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 14:26:42,083 INFO L255 TraceCheckSpWp]: Trace formula consists of 432 conjuncts, 22 conjuncts are in the unsatisfiable core [2024-10-11 14:26:42,087 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 14:26:42,333 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-11 14:26:42,334 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 40 treesize of output 52 [2024-10-11 14:26:42,434 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2024-10-11 14:26:42,435 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-11 14:26:42,794 INFO L349 Elim1Store]: treesize reduction 32, result has 73.6 percent of original size [2024-10-11 14:26:42,794 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 46 treesize of output 102 [2024-10-11 14:26:42,895 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2024-10-11 14:26:42,896 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [452621255] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-11 14:26:42,896 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-11 14:26:42,896 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11, 9] total 30 [2024-10-11 14:26:42,896 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [966452281] [2024-10-11 14:26:42,896 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-11 14:26:42,897 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2024-10-11 14:26:42,897 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 14:26:42,897 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2024-10-11 14:26:42,897 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=767, Unknown=0, NotChecked=0, Total=870 [2024-10-11 14:26:42,898 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 31 [2024-10-11 14:26:42,898 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 61 transitions, 407 flow. Second operand has 30 states, 30 states have (on average 6.233333333333333) internal successors, (187), 30 states have internal predecessors, (187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 14:26:42,898 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 14:26:42,898 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 31 [2024-10-11 14:26:42,898 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 14:26:44,577 INFO L124 PetriNetUnfolderBase]: 1950/2822 cut-off events. [2024-10-11 14:26:44,578 INFO L125 PetriNetUnfolderBase]: For 5558/5558 co-relation queries the response was YES. [2024-10-11 14:26:44,584 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9832 conditions, 2822 events. 1950/2822 cut-off events. For 5558/5558 co-relation queries the response was YES. Maximal size of possible extension queue 156. Compared 12226 event pairs, 164 based on Foata normal form. 3/2387 useless extension candidates. Maximal degree in co-relation 9726. Up to 880 conditions per place. [2024-10-11 14:26:44,593 INFO L140 encePairwiseOnDemand]: 17/31 looper letters, 162 selfloop transitions, 90 changer transitions 30/283 dead transitions. [2024-10-11 14:26:44,593 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 88 places, 283 transitions, 2099 flow [2024-10-11 14:26:44,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2024-10-11 14:26:44,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2024-10-11 14:26:44,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 306 transitions. [2024-10-11 14:26:44,595 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4112903225806452 [2024-10-11 14:26:44,595 INFO L175 Difference]: Start difference. First operand has 65 places, 61 transitions, 407 flow. Second operand 24 states and 306 transitions. [2024-10-11 14:26:44,595 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 88 places, 283 transitions, 2099 flow [2024-10-11 14:26:44,600 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 84 places, 283 transitions, 2001 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-10-11 14:26:44,603 INFO L231 Difference]: Finished difference. Result has 96 places, 150 transitions, 1342 flow [2024-10-11 14:26:44,603 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=389, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=61, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=1342, PETRI_PLACES=96, PETRI_TRANSITIONS=150} [2024-10-11 14:26:44,603 INFO L277 CegarLoopForPetriNet]: 31 programPoint places, 65 predicate places. [2024-10-11 14:26:44,603 INFO L471 AbstractCegarLoop]: Abstraction has has 96 places, 150 transitions, 1342 flow [2024-10-11 14:26:44,604 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 6.233333333333333) internal successors, (187), 30 states have internal predecessors, (187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 14:26:44,604 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 14:26:44,604 INFO L204 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 14:26:44,617 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-10-11 14:26:44,807 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2024-10-11 14:26:44,808 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-10-11 14:26:44,808 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 14:26:44,808 INFO L85 PathProgramCache]: Analyzing trace with hash 989591081, now seen corresponding path program 2 times [2024-10-11 14:26:44,808 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 14:26:44,809 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1563476375] [2024-10-11 14:26:44,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 14:26:44,809 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 14:26:44,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 14:26:45,705 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2024-10-11 14:26:45,705 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 14:26:45,705 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1563476375] [2024-10-11 14:26:45,705 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1563476375] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-11 14:26:45,706 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [555174215] [2024-10-11 14:26:45,706 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-11 14:26:45,706 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 14:26:45,706 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 14:26:45,710 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-11 14:26:45,711 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-10-11 14:26:45,839 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-11 14:26:45,840 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-11 14:26:45,841 INFO L255 TraceCheckSpWp]: Trace formula consists of 432 conjuncts, 32 conjuncts are in the unsatisfiable core [2024-10-11 14:26:45,843 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 14:26:46,163 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-11 14:26:46,163 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 80 treesize of output 120 [2024-10-11 14:26:46,262 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2024-10-11 14:26:46,262 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-11 14:26:46,576 INFO L349 Elim1Store]: treesize reduction 32, result has 73.6 percent of original size [2024-10-11 14:26:46,576 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 46 treesize of output 102 [2024-10-11 14:26:46,648 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2024-10-11 14:26:46,649 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [555174215] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-11 14:26:46,649 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-11 14:26:46,649 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 9] total 29 [2024-10-11 14:26:46,649 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [348362766] [2024-10-11 14:26:46,649 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-11 14:26:46,649 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2024-10-11 14:26:46,650 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 14:26:46,650 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2024-10-11 14:26:46,650 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=703, Unknown=0, NotChecked=0, Total=812 [2024-10-11 14:26:46,651 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 31 [2024-10-11 14:26:46,651 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 96 places, 150 transitions, 1342 flow. Second operand has 29 states, 29 states have (on average 6.206896551724138) internal successors, (180), 29 states have internal predecessors, (180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 14:26:46,651 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 14:26:46,651 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 31 [2024-10-11 14:26:46,651 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 14:26:48,012 INFO L124 PetriNetUnfolderBase]: 1933/2835 cut-off events. [2024-10-11 14:26:48,013 INFO L125 PetriNetUnfolderBase]: For 12976/12976 co-relation queries the response was YES. [2024-10-11 14:26:48,022 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14113 conditions, 2835 events. 1933/2835 cut-off events. For 12976/12976 co-relation queries the response was YES. Maximal size of possible extension queue 159. Compared 12538 event pairs, 296 based on Foata normal form. 2/2822 useless extension candidates. Maximal degree in co-relation 13993. Up to 1044 conditions per place. [2024-10-11 14:26:48,039 INFO L140 encePairwiseOnDemand]: 18/31 looper letters, 149 selfloop transitions, 93 changer transitions 11/254 dead transitions. [2024-10-11 14:26:48,039 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 114 places, 254 transitions, 2441 flow [2024-10-11 14:26:48,039 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2024-10-11 14:26:48,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2024-10-11 14:26:48,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 243 transitions. [2024-10-11 14:26:48,040 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.3919354838709677 [2024-10-11 14:26:48,040 INFO L175 Difference]: Start difference. First operand has 96 places, 150 transitions, 1342 flow. Second operand 20 states and 243 transitions. [2024-10-11 14:26:48,040 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 114 places, 254 transitions, 2441 flow [2024-10-11 14:26:48,059 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 111 places, 254 transitions, 2360 flow, removed 37 selfloop flow, removed 3 redundant places. [2024-10-11 14:26:48,062 INFO L231 Difference]: Finished difference. Result has 115 places, 162 transitions, 1592 flow [2024-10-11 14:26:48,062 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1265, PETRI_DIFFERENCE_MINUEND_PLACES=92, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=150, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=82, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=65, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=1592, PETRI_PLACES=115, PETRI_TRANSITIONS=162} [2024-10-11 14:26:48,062 INFO L277 CegarLoopForPetriNet]: 31 programPoint places, 84 predicate places. [2024-10-11 14:26:48,063 INFO L471 AbstractCegarLoop]: Abstraction has has 115 places, 162 transitions, 1592 flow [2024-10-11 14:26:48,063 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 6.206896551724138) internal successors, (180), 29 states have internal predecessors, (180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 14:26:48,063 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 14:26:48,063 INFO L204 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 14:26:48,076 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2024-10-11 14:26:48,266 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,8 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 14:26:48,266 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-10-11 14:26:48,267 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 14:26:48,267 INFO L85 PathProgramCache]: Analyzing trace with hash 1147447781, now seen corresponding path program 3 times [2024-10-11 14:26:48,267 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 14:26:48,267 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2071373300] [2024-10-11 14:26:48,267 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 14:26:48,267 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 14:26:48,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 14:26:49,226 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2024-10-11 14:26:49,226 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 14:26:49,226 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2071373300] [2024-10-11 14:26:49,226 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2071373300] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-11 14:26:49,226 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [657490036] [2024-10-11 14:26:49,227 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-10-11 14:26:49,227 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 14:26:49,227 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 14:26:49,228 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-11 14:26:49,229 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-10-11 14:26:49,376 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-10-11 14:26:49,376 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-11 14:26:49,378 INFO L255 TraceCheckSpWp]: Trace formula consists of 405 conjuncts, 34 conjuncts are in the unsatisfiable core [2024-10-11 14:26:49,380 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 14:26:49,542 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-11 14:26:49,543 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 40 treesize of output 40 [2024-10-11 14:26:49,620 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2024-10-11 14:26:49,621 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-11 14:26:49,925 INFO L349 Elim1Store]: treesize reduction 32, result has 73.6 percent of original size [2024-10-11 14:26:49,925 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 46 treesize of output 102 [2024-10-11 14:26:50,020 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2024-10-11 14:26:50,020 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [657490036] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-11 14:26:50,020 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-11 14:26:50,021 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 9] total 26 [2024-10-11 14:26:50,021 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [244371974] [2024-10-11 14:26:50,021 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-11 14:26:50,021 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2024-10-11 14:26:50,021 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 14:26:50,022 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2024-10-11 14:26:50,022 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=559, Unknown=0, NotChecked=0, Total=650 [2024-10-11 14:26:50,022 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 31 [2024-10-11 14:26:50,022 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 115 places, 162 transitions, 1592 flow. Second operand has 26 states, 26 states have (on average 6.3076923076923075) internal successors, (164), 26 states have internal predecessors, (164), 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) [2024-10-11 14:26:50,022 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 14:26:50,022 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 31 [2024-10-11 14:26:50,022 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 14:26:51,519 INFO L124 PetriNetUnfolderBase]: 2167/3172 cut-off events. [2024-10-11 14:26:51,519 INFO L125 PetriNetUnfolderBase]: For 19135/19135 co-relation queries the response was YES. [2024-10-11 14:26:51,531 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17308 conditions, 3172 events. 2167/3172 cut-off events. For 19135/19135 co-relation queries the response was YES. Maximal size of possible extension queue 183. Compared 14362 event pairs, 334 based on Foata normal form. 1/3154 useless extension candidates. Maximal degree in co-relation 17185. Up to 1156 conditions per place. [2024-10-11 14:26:51,543 INFO L140 encePairwiseOnDemand]: 18/31 looper letters, 165 selfloop transitions, 106 changer transitions 15/287 dead transitions. [2024-10-11 14:26:51,543 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 137 places, 287 transitions, 2970 flow [2024-10-11 14:26:51,543 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2024-10-11 14:26:51,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2024-10-11 14:26:51,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 280 transitions. [2024-10-11 14:26:51,545 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.39270687237026647 [2024-10-11 14:26:51,546 INFO L175 Difference]: Start difference. First operand has 115 places, 162 transitions, 1592 flow. Second operand 23 states and 280 transitions. [2024-10-11 14:26:51,546 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 137 places, 287 transitions, 2970 flow [2024-10-11 14:26:51,577 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 124 places, 287 transitions, 2826 flow, removed 9 selfloop flow, removed 13 redundant places. [2024-10-11 14:26:51,580 INFO L231 Difference]: Finished difference. Result has 129 places, 179 transitions, 1872 flow [2024-10-11 14:26:51,581 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1457, PETRI_DIFFERENCE_MINUEND_PLACES=102, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=162, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=89, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=1872, PETRI_PLACES=129, PETRI_TRANSITIONS=179} [2024-10-11 14:26:51,581 INFO L277 CegarLoopForPetriNet]: 31 programPoint places, 98 predicate places. [2024-10-11 14:26:51,581 INFO L471 AbstractCegarLoop]: Abstraction has has 129 places, 179 transitions, 1872 flow [2024-10-11 14:26:51,581 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 6.3076923076923075) internal successors, (164), 26 states have internal predecessors, (164), 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) [2024-10-11 14:26:51,582 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 14:26:51,582 INFO L204 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 14:26:51,596 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2024-10-11 14:26:51,782 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2024-10-11 14:26:51,782 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-10-11 14:26:51,783 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 14:26:51,783 INFO L85 PathProgramCache]: Analyzing trace with hash 920365107, now seen corresponding path program 4 times [2024-10-11 14:26:51,783 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 14:26:51,783 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1885832961] [2024-10-11 14:26:51,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 14:26:51,783 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 14:26:51,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 14:26:52,627 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2024-10-11 14:26:52,627 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 14:26:52,627 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1885832961] [2024-10-11 14:26:52,627 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1885832961] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-11 14:26:52,627 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1830296493] [2024-10-11 14:26:52,627 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-10-11 14:26:52,628 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 14:26:52,628 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 14:26:52,629 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-11 14:26:52,631 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-10-11 14:26:52,781 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-10-11 14:26:52,782 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-11 14:26:52,784 INFO L255 TraceCheckSpWp]: Trace formula consists of 432 conjuncts, 22 conjuncts are in the unsatisfiable core [2024-10-11 14:26:52,785 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 14:26:52,961 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-11 14:26:52,961 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 40 treesize of output 52 [2024-10-11 14:26:53,011 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2024-10-11 14:26:53,012 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-11 14:26:53,430 INFO L349 Elim1Store]: treesize reduction 8, result has 96.1 percent of original size [2024-10-11 14:26:53,430 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 56 treesize of output 212 [2024-10-11 14:27:00,846 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2024-10-11 14:27:00,847 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1830296493] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-11 14:27:00,847 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-11 14:27:00,847 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11, 9] total 29 [2024-10-11 14:27:00,847 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2119722186] [2024-10-11 14:27:00,847 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-11 14:27:00,848 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2024-10-11 14:27:00,848 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 14:27:00,849 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2024-10-11 14:27:00,852 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=709, Unknown=0, NotChecked=0, Total=812 [2024-10-11 14:27:00,852 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 31 [2024-10-11 14:27:00,852 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 129 places, 179 transitions, 1872 flow. Second operand has 29 states, 29 states have (on average 6.172413793103448) internal successors, (179), 29 states have internal predecessors, (179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 14:27:00,853 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 14:27:00,853 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 31 [2024-10-11 14:27:00,853 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 14:27:04,174 INFO L124 PetriNetUnfolderBase]: 3357/4854 cut-off events. [2024-10-11 14:27:04,174 INFO L125 PetriNetUnfolderBase]: For 35296/35296 co-relation queries the response was YES. [2024-10-11 14:27:04,192 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28305 conditions, 4854 events. 3357/4854 cut-off events. For 35296/35296 co-relation queries the response was YES. Maximal size of possible extension queue 294. Compared 23525 event pairs, 382 based on Foata normal form. 1/4847 useless extension candidates. Maximal degree in co-relation 28177. Up to 2601 conditions per place. [2024-10-11 14:27:04,208 INFO L140 encePairwiseOnDemand]: 18/31 looper letters, 221 selfloop transitions, 183 changer transitions 59/464 dead transitions. [2024-10-11 14:27:04,209 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 162 places, 464 transitions, 5257 flow [2024-10-11 14:27:04,209 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2024-10-11 14:27:04,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2024-10-11 14:27:04,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 402 transitions. [2024-10-11 14:27:04,212 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.38140417457305503 [2024-10-11 14:27:04,214 INFO L175 Difference]: Start difference. First operand has 129 places, 179 transitions, 1872 flow. Second operand 34 states and 402 transitions. [2024-10-11 14:27:04,214 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 162 places, 464 transitions, 5257 flow [2024-10-11 14:27:04,277 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 148 places, 464 transitions, 5062 flow, removed 29 selfloop flow, removed 14 redundant places. [2024-10-11 14:27:04,285 INFO L231 Difference]: Finished difference. Result has 168 places, 285 transitions, 3603 flow [2024-10-11 14:27:04,286 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1740, PETRI_DIFFERENCE_MINUEND_PLACES=115, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=179, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=93, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=34, PETRI_FLOW=3603, PETRI_PLACES=168, PETRI_TRANSITIONS=285} [2024-10-11 14:27:04,286 INFO L277 CegarLoopForPetriNet]: 31 programPoint places, 137 predicate places. [2024-10-11 14:27:04,286 INFO L471 AbstractCegarLoop]: Abstraction has has 168 places, 285 transitions, 3603 flow [2024-10-11 14:27:04,286 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 6.172413793103448) internal successors, (179), 29 states have internal predecessors, (179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 14:27:04,286 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 14:27:04,286 INFO L204 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 14:27:04,300 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2024-10-11 14:27:04,487 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2024-10-11 14:27:04,487 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-10-11 14:27:04,488 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 14:27:04,488 INFO L85 PathProgramCache]: Analyzing trace with hash 1764544779, now seen corresponding path program 5 times [2024-10-11 14:27:04,488 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 14:27:04,488 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [864436848] [2024-10-11 14:27:04,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 14:27:04,488 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 14:27:04,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 14:27:05,310 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2024-10-11 14:27:05,310 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 14:27:05,311 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [864436848] [2024-10-11 14:27:05,311 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [864436848] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-11 14:27:05,311 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1418790302] [2024-10-11 14:27:05,311 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-10-11 14:27:05,311 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 14:27:05,311 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 14:27:05,312 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-11 14:27:05,314 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-10-11 14:27:05,845 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2024-10-11 14:27:05,845 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-11 14:27:05,852 INFO L255 TraceCheckSpWp]: Trace formula consists of 432 conjuncts, 36 conjuncts are in the unsatisfiable core [2024-10-11 14:27:05,854 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 14:27:06,091 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-11 14:27:06,092 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 40 treesize of output 48 [2024-10-11 14:27:06,134 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2024-10-11 14:27:06,134 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-11 14:27:06,460 INFO L349 Elim1Store]: treesize reduction 32, result has 73.6 percent of original size [2024-10-11 14:27:06,460 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 46 treesize of output 102 [2024-10-11 14:27:06,583 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2024-10-11 14:27:06,584 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1418790302] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-11 14:27:06,584 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-11 14:27:06,584 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 9] total 32 [2024-10-11 14:27:06,584 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [921061000] [2024-10-11 14:27:06,584 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-11 14:27:06,584 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2024-10-11 14:27:06,585 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 14:27:06,585 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2024-10-11 14:27:06,585 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=860, Unknown=0, NotChecked=0, Total=992 [2024-10-11 14:27:06,586 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 31 [2024-10-11 14:27:06,586 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 168 places, 285 transitions, 3603 flow. Second operand has 32 states, 32 states have (on average 6.3125) internal successors, (202), 32 states have internal predecessors, (202), 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) [2024-10-11 14:27:06,586 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 14:27:06,586 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 31 [2024-10-11 14:27:06,586 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 14:27:08,394 INFO L124 PetriNetUnfolderBase]: 2962/4339 cut-off events. [2024-10-11 14:27:08,394 INFO L125 PetriNetUnfolderBase]: For 125957/125957 co-relation queries the response was YES. [2024-10-11 14:27:08,415 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35956 conditions, 4339 events. 2962/4339 cut-off events. For 125957/125957 co-relation queries the response was YES. Maximal size of possible extension queue 275. Compared 21209 event pairs, 498 based on Foata normal form. 1/4340 useless extension candidates. Maximal degree in co-relation 35808. Up to 2008 conditions per place. [2024-10-11 14:27:08,433 INFO L140 encePairwiseOnDemand]: 19/31 looper letters, 225 selfloop transitions, 144 changer transitions 9/379 dead transitions. [2024-10-11 14:27:08,434 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 186 places, 379 transitions, 5288 flow [2024-10-11 14:27:08,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2024-10-11 14:27:08,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2024-10-11 14:27:08,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 234 transitions. [2024-10-11 14:27:08,436 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.3774193548387097 [2024-10-11 14:27:08,436 INFO L175 Difference]: Start difference. First operand has 168 places, 285 transitions, 3603 flow. Second operand 20 states and 234 transitions. [2024-10-11 14:27:08,436 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 186 places, 379 transitions, 5288 flow [2024-10-11 14:27:08,694 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 178 places, 379 transitions, 4941 flow, removed 140 selfloop flow, removed 8 redundant places. [2024-10-11 14:27:08,699 INFO L231 Difference]: Finished difference. Result has 184 places, 295 transitions, 3798 flow [2024-10-11 14:27:08,699 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=3280, PETRI_DIFFERENCE_MINUEND_PLACES=159, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=285, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=134, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=144, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=3798, PETRI_PLACES=184, PETRI_TRANSITIONS=295} [2024-10-11 14:27:08,700 INFO L277 CegarLoopForPetriNet]: 31 programPoint places, 153 predicate places. [2024-10-11 14:27:08,701 INFO L471 AbstractCegarLoop]: Abstraction has has 184 places, 295 transitions, 3798 flow [2024-10-11 14:27:08,702 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 6.3125) internal successors, (202), 32 states have internal predecessors, (202), 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) [2024-10-11 14:27:08,702 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 14:27:08,702 INFO L204 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 14:27:08,718 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2024-10-11 14:27:08,903 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2024-10-11 14:27:08,903 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-10-11 14:27:08,903 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 14:27:08,904 INFO L85 PathProgramCache]: Analyzing trace with hash 1586902929, now seen corresponding path program 6 times [2024-10-11 14:27:08,904 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 14:27:08,904 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [655807038] [2024-10-11 14:27:08,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 14:27:08,904 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 14:27:08,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 14:27:09,601 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2024-10-11 14:27:09,601 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 14:27:09,601 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [655807038] [2024-10-11 14:27:09,601 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [655807038] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-11 14:27:09,601 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2039182609] [2024-10-11 14:27:09,602 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-10-11 14:27:09,602 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 14:27:09,602 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 14:27:09,603 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-11 14:27:09,604 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-10-11 14:27:09,750 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2024-10-11 14:27:09,750 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-11 14:27:09,752 INFO L255 TraceCheckSpWp]: Trace formula consists of 378 conjuncts, 32 conjuncts are in the unsatisfiable core [2024-10-11 14:27:09,754 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 14:27:10,041 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-11 14:27:10,041 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 59 treesize of output 75 [2024-10-11 14:27:10,116 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2024-10-11 14:27:10,117 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-11 14:27:10,408 INFO L349 Elim1Store]: treesize reduction 32, result has 73.6 percent of original size [2024-10-11 14:27:10,409 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 46 treesize of output 102 [2024-10-11 14:27:10,490 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2024-10-11 14:27:10,491 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2039182609] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-11 14:27:10,491 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-11 14:27:10,491 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 9] total 29 [2024-10-11 14:27:10,491 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1645584109] [2024-10-11 14:27:10,491 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-11 14:27:10,491 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2024-10-11 14:27:10,492 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 14:27:10,492 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2024-10-11 14:27:10,492 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=712, Unknown=0, NotChecked=0, Total=812 [2024-10-11 14:27:10,492 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 31 [2024-10-11 14:27:10,493 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 184 places, 295 transitions, 3798 flow. Second operand has 29 states, 29 states have (on average 6.206896551724138) internal successors, (180), 29 states have internal predecessors, (180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 14:27:10,493 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 14:27:10,493 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 31 [2024-10-11 14:27:10,493 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 14:27:12,827 INFO L124 PetriNetUnfolderBase]: 3158/4626 cut-off events. [2024-10-11 14:27:12,828 INFO L125 PetriNetUnfolderBase]: For 164914/164914 co-relation queries the response was YES. [2024-10-11 14:27:12,854 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40108 conditions, 4626 events. 3158/4626 cut-off events. For 164914/164914 co-relation queries the response was YES. Maximal size of possible extension queue 289. Compared 22903 event pairs, 369 based on Foata normal form. 1/4627 useless extension candidates. Maximal degree in co-relation 39954. Up to 1665 conditions per place. [2024-10-11 14:27:12,874 INFO L140 encePairwiseOnDemand]: 19/31 looper letters, 245 selfloop transitions, 187 changer transitions 4/437 dead transitions. [2024-10-11 14:27:12,874 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 213 places, 437 transitions, 6226 flow [2024-10-11 14:27:12,874 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2024-10-11 14:27:12,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2024-10-11 14:27:12,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 358 transitions. [2024-10-11 14:27:12,875 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.372528616024974 [2024-10-11 14:27:12,876 INFO L175 Difference]: Start difference. First operand has 184 places, 295 transitions, 3798 flow. Second operand 31 states and 358 transitions. [2024-10-11 14:27:12,876 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 213 places, 437 transitions, 6226 flow [2024-10-11 14:27:13,197 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 201 places, 437 transitions, 5915 flow, removed 63 selfloop flow, removed 12 redundant places. [2024-10-11 14:27:13,202 INFO L231 Difference]: Finished difference. Result has 209 places, 315 transitions, 4312 flow [2024-10-11 14:27:13,202 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=3541, PETRI_DIFFERENCE_MINUEND_PLACES=171, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=295, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=169, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=118, PETRI_DIFFERENCE_SUBTRAHEND_STATES=31, PETRI_FLOW=4312, PETRI_PLACES=209, PETRI_TRANSITIONS=315} [2024-10-11 14:27:13,203 INFO L277 CegarLoopForPetriNet]: 31 programPoint places, 178 predicate places. [2024-10-11 14:27:13,203 INFO L471 AbstractCegarLoop]: Abstraction has has 209 places, 315 transitions, 4312 flow [2024-10-11 14:27:13,203 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 6.206896551724138) internal successors, (180), 29 states have internal predecessors, (180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 14:27:13,203 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 14:27:13,203 INFO L204 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 14:27:13,217 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2024-10-11 14:27:13,407 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,12 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 14:27:13,408 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-10-11 14:27:13,408 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 14:27:13,408 INFO L85 PathProgramCache]: Analyzing trace with hash 1757135269, now seen corresponding path program 7 times [2024-10-11 14:27:13,408 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 14:27:13,409 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [989329947] [2024-10-11 14:27:13,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 14:27:13,409 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 14:27:13,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 14:27:14,437 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2024-10-11 14:27:14,437 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 14:27:14,437 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [989329947] [2024-10-11 14:27:14,437 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [989329947] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-11 14:27:14,437 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [540087022] [2024-10-11 14:27:14,438 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-10-11 14:27:14,438 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 14:27:14,438 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 14:27:14,439 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-11 14:27:14,440 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-10-11 14:27:14,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 14:27:14,593 INFO L255 TraceCheckSpWp]: Trace formula consists of 432 conjuncts, 22 conjuncts are in the unsatisfiable core [2024-10-11 14:27:14,595 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 14:27:14,721 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-11 14:27:14,722 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 40 treesize of output 52 [2024-10-11 14:27:14,762 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2024-10-11 14:27:14,762 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-11 14:27:15,072 INFO L349 Elim1Store]: treesize reduction 32, result has 73.6 percent of original size [2024-10-11 14:27:15,073 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 46 treesize of output 102 [2024-10-11 14:27:15,187 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2024-10-11 14:27:15,187 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [540087022] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-11 14:27:15,188 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-11 14:27:15,188 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11, 9] total 30 [2024-10-11 14:27:15,188 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [366358404] [2024-10-11 14:27:15,188 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-11 14:27:15,188 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2024-10-11 14:27:15,189 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 14:27:15,189 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2024-10-11 14:27:15,189 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=755, Unknown=0, NotChecked=0, Total=870 [2024-10-11 14:27:15,189 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 31 [2024-10-11 14:27:15,190 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 209 places, 315 transitions, 4312 flow. Second operand has 30 states, 30 states have (on average 6.133333333333334) internal successors, (184), 30 states have internal predecessors, (184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 14:27:15,190 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 14:27:15,190 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 31 [2024-10-11 14:27:15,190 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 14:27:19,903 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-10-11 14:27:21,969 INFO L124 PetriNetUnfolderBase]: 3174/4653 cut-off events. [2024-10-11 14:27:21,969 INFO L125 PetriNetUnfolderBase]: For 170298/170298 co-relation queries the response was YES. [2024-10-11 14:27:21,997 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41684 conditions, 4653 events. 3174/4653 cut-off events. For 170298/170298 co-relation queries the response was YES. Maximal size of possible extension queue 289. Compared 23113 event pairs, 543 based on Foata normal form. 2/4655 useless extension candidates. Maximal degree in co-relation 41523. Up to 2292 conditions per place. [2024-10-11 14:27:22,016 INFO L140 encePairwiseOnDemand]: 18/31 looper letters, 241 selfloop transitions, 147 changer transitions 2/391 dead transitions. [2024-10-11 14:27:22,017 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 228 places, 391 transitions, 5786 flow [2024-10-11 14:27:22,017 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2024-10-11 14:27:22,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2024-10-11 14:27:22,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 232 transitions. [2024-10-11 14:27:22,018 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.3741935483870968 [2024-10-11 14:27:22,018 INFO L175 Difference]: Start difference. First operand has 209 places, 315 transitions, 4312 flow. Second operand 20 states and 232 transitions. [2024-10-11 14:27:22,018 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 228 places, 391 transitions, 5786 flow [2024-10-11 14:27:22,398 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 210 places, 391 transitions, 5436 flow, removed 61 selfloop flow, removed 18 redundant places. [2024-10-11 14:27:22,403 INFO L231 Difference]: Finished difference. Result has 212 places, 320 transitions, 4377 flow [2024-10-11 14:27:22,403 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=3967, PETRI_DIFFERENCE_MINUEND_PLACES=191, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=315, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=143, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=170, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=4377, PETRI_PLACES=212, PETRI_TRANSITIONS=320} [2024-10-11 14:27:22,403 INFO L277 CegarLoopForPetriNet]: 31 programPoint places, 181 predicate places. [2024-10-11 14:27:22,404 INFO L471 AbstractCegarLoop]: Abstraction has has 212 places, 320 transitions, 4377 flow [2024-10-11 14:27:22,404 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 6.133333333333334) internal successors, (184), 30 states have internal predecessors, (184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 14:27:22,404 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 14:27:22,404 INFO L204 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 14:27:22,418 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2024-10-11 14:27:22,604 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,13 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 14:27:22,605 INFO L396 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-10-11 14:27:22,605 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 14:27:22,605 INFO L85 PathProgramCache]: Analyzing trace with hash 1999907323, now seen corresponding path program 8 times [2024-10-11 14:27:22,605 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 14:27:22,606 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [195049919] [2024-10-11 14:27:22,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 14:27:22,606 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 14:27:22,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 14:27:23,459 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2024-10-11 14:27:23,460 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 14:27:23,460 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [195049919] [2024-10-11 14:27:23,460 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [195049919] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-11 14:27:23,460 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1447307088] [2024-10-11 14:27:23,460 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-11 14:27:23,460 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 14:27:23,460 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 14:27:23,462 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-11 14:27:23,463 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-10-11 14:27:23,617 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-11 14:27:23,617 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-11 14:27:23,620 INFO L255 TraceCheckSpWp]: Trace formula consists of 432 conjuncts, 34 conjuncts are in the unsatisfiable core [2024-10-11 14:27:23,622 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 14:27:23,927 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-11 14:27:23,927 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 59 treesize of output 75 [2024-10-11 14:27:24,023 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2024-10-11 14:27:24,023 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-11 14:27:24,544 INFO L349 Elim1Store]: treesize reduction 8, result has 96.1 percent of original size [2024-10-11 14:27:24,545 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 54 treesize of output 210 [2024-10-11 14:27:33,423 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2024-10-11 14:27:33,423 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1447307088] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-11 14:27:33,424 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-11 14:27:33,424 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 9] total 27 [2024-10-11 14:27:33,424 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1414744805] [2024-10-11 14:27:33,424 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-11 14:27:33,424 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2024-10-11 14:27:33,424 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 14:27:33,425 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2024-10-11 14:27:33,425 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=610, Unknown=0, NotChecked=0, Total=702 [2024-10-11 14:27:33,425 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 31 [2024-10-11 14:27:33,426 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 212 places, 320 transitions, 4377 flow. Second operand has 27 states, 27 states have (on average 6.2592592592592595) internal successors, (169), 27 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 14:27:33,426 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 14:27:33,426 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 31 [2024-10-11 14:27:33,427 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 14:27:35,706 INFO L124 PetriNetUnfolderBase]: 3699/5475 cut-off events. [2024-10-11 14:27:35,707 INFO L125 PetriNetUnfolderBase]: For 203306/203306 co-relation queries the response was YES. [2024-10-11 14:27:35,742 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49496 conditions, 5475 events. 3699/5475 cut-off events. For 203306/203306 co-relation queries the response was YES. Maximal size of possible extension queue 341. Compared 28646 event pairs, 694 based on Foata normal form. 2/5477 useless extension candidates. Maximal degree in co-relation 49334. Up to 4013 conditions per place. [2024-10-11 14:27:35,766 INFO L140 encePairwiseOnDemand]: 18/31 looper letters, 311 selfloop transitions, 152 changer transitions 2/466 dead transitions. [2024-10-11 14:27:35,766 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 234 places, 466 transitions, 7132 flow [2024-10-11 14:27:35,766 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2024-10-11 14:27:35,766 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2024-10-11 14:27:35,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 262 transitions. [2024-10-11 14:27:35,767 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.36746143057503505 [2024-10-11 14:27:35,767 INFO L175 Difference]: Start difference. First operand has 212 places, 320 transitions, 4377 flow. Second operand 23 states and 262 transitions. [2024-10-11 14:27:35,767 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 234 places, 466 transitions, 7132 flow [2024-10-11 14:27:36,212 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 218 places, 466 transitions, 6809 flow, removed 27 selfloop flow, removed 16 redundant places. [2024-10-11 14:27:36,218 INFO L231 Difference]: Finished difference. Result has 225 places, 374 transitions, 5305 flow [2024-10-11 14:27:36,218 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=4108, PETRI_DIFFERENCE_MINUEND_PLACES=196, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=320, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=105, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=205, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=5305, PETRI_PLACES=225, PETRI_TRANSITIONS=374} [2024-10-11 14:27:36,219 INFO L277 CegarLoopForPetriNet]: 31 programPoint places, 194 predicate places. [2024-10-11 14:27:36,219 INFO L471 AbstractCegarLoop]: Abstraction has has 225 places, 374 transitions, 5305 flow [2024-10-11 14:27:36,219 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 6.2592592592592595) internal successors, (169), 27 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 14:27:36,219 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 14:27:36,219 INFO L204 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 14:27:36,232 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2024-10-11 14:27:36,423 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,14 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 14:27:36,424 INFO L396 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-10-11 14:27:36,424 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 14:27:36,424 INFO L85 PathProgramCache]: Analyzing trace with hash 1307130631, now seen corresponding path program 9 times [2024-10-11 14:27:36,424 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 14:27:36,424 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1698545695] [2024-10-11 14:27:36,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 14:27:36,425 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 14:27:36,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 14:27:37,085 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2024-10-11 14:27:37,085 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 14:27:37,085 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1698545695] [2024-10-11 14:27:37,086 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1698545695] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-11 14:27:37,086 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1588232802] [2024-10-11 14:27:37,086 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-10-11 14:27:37,086 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 14:27:37,086 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 14:27:37,089 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-11 14:27:37,094 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2024-10-11 14:27:37,242 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-10-11 14:27:37,242 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-11 14:27:37,244 INFO L255 TraceCheckSpWp]: Trace formula consists of 351 conjuncts, 34 conjuncts are in the unsatisfiable core [2024-10-11 14:27:37,245 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 14:27:37,524 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-11 14:27:37,525 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 59 treesize of output 75 [2024-10-11 14:27:37,601 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2024-10-11 14:27:37,602 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-11 14:27:37,996 INFO L349 Elim1Store]: treesize reduction 8, result has 96.1 percent of original size [2024-10-11 14:27:37,996 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 54 treesize of output 210 [2024-10-11 14:27:43,091 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2024-10-11 14:27:43,091 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1588232802] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-11 14:27:43,091 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-11 14:27:43,091 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 9] total 28 [2024-10-11 14:27:43,091 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [167957652] [2024-10-11 14:27:43,091 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-11 14:27:43,092 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2024-10-11 14:27:43,092 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 14:27:43,092 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2024-10-11 14:27:43,092 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=663, Unknown=0, NotChecked=0, Total=756 [2024-10-11 14:27:43,093 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 31 [2024-10-11 14:27:43,093 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 225 places, 374 transitions, 5305 flow. Second operand has 28 states, 28 states have (on average 6.25) internal successors, (175), 28 states have internal predecessors, (175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 14:27:43,093 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 14:27:43,093 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 31 [2024-10-11 14:27:43,093 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 14:27:45,834 INFO L124 PetriNetUnfolderBase]: 4470/6651 cut-off events. [2024-10-11 14:27:45,835 INFO L125 PetriNetUnfolderBase]: For 262191/262191 co-relation queries the response was YES. [2024-10-11 14:27:45,876 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62451 conditions, 6651 events. 4470/6651 cut-off events. For 262191/262191 co-relation queries the response was YES. Maximal size of possible extension queue 421. Compared 36435 event pairs, 777 based on Foata normal form. 2/6653 useless extension candidates. Maximal degree in co-relation 62282. Up to 4589 conditions per place. [2024-10-11 14:27:45,903 INFO L140 encePairwiseOnDemand]: 18/31 looper letters, 336 selfloop transitions, 191 changer transitions 2/530 dead transitions. [2024-10-11 14:27:45,903 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 247 places, 530 transitions, 8481 flow [2024-10-11 14:27:45,904 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2024-10-11 14:27:45,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2024-10-11 14:27:45,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 264 transitions. [2024-10-11 14:27:45,904 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.3702664796633941 [2024-10-11 14:27:45,905 INFO L175 Difference]: Start difference. First operand has 225 places, 374 transitions, 5305 flow. Second operand 23 states and 264 transitions. [2024-10-11 14:27:45,905 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 247 places, 530 transitions, 8481 flow [2024-10-11 14:27:46,441 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 242 places, 530 transitions, 8344 flow, removed 62 selfloop flow, removed 5 redundant places. [2024-10-11 14:27:46,449 INFO L231 Difference]: Finished difference. Result has 249 places, 427 transitions, 6614 flow [2024-10-11 14:27:46,449 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=5184, PETRI_DIFFERENCE_MINUEND_PLACES=220, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=374, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=145, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=215, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=6614, PETRI_PLACES=249, PETRI_TRANSITIONS=427} [2024-10-11 14:27:46,449 INFO L277 CegarLoopForPetriNet]: 31 programPoint places, 218 predicate places. [2024-10-11 14:27:46,449 INFO L471 AbstractCegarLoop]: Abstraction has has 249 places, 427 transitions, 6614 flow [2024-10-11 14:27:46,450 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 6.25) internal successors, (175), 28 states have internal predecessors, (175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 14:27:46,450 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 14:27:46,450 INFO L204 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 14:27:46,464 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2024-10-11 14:27:46,654 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2024-10-11 14:27:46,655 INFO L396 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-10-11 14:27:46,655 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 14:27:46,655 INFO L85 PathProgramCache]: Analyzing trace with hash -282412571, now seen corresponding path program 10 times [2024-10-11 14:27:46,656 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 14:27:46,656 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [242124394] [2024-10-11 14:27:46,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 14:27:46,656 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 14:27:46,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 14:27:47,733 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2024-10-11 14:27:47,734 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 14:27:47,734 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [242124394] [2024-10-11 14:27:47,734 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [242124394] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-11 14:27:47,734 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1008235117] [2024-10-11 14:27:47,734 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-10-11 14:27:47,734 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 14:27:47,735 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 14:27:47,737 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-11 14:27:47,742 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2024-10-11 14:27:47,910 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-10-11 14:27:47,910 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-11 14:27:47,912 INFO L255 TraceCheckSpWp]: Trace formula consists of 432 conjuncts, 22 conjuncts are in the unsatisfiable core [2024-10-11 14:27:47,914 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 14:27:48,088 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-11 14:27:48,089 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 40 treesize of output 52 [2024-10-11 14:27:48,151 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2024-10-11 14:27:48,152 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-11 14:27:52,641 INFO L349 Elim1Store]: treesize reduction 8, result has 96.1 percent of original size [2024-10-11 14:27:52,642 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 54 treesize of output 210 [2024-10-11 14:27:58,098 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2024-10-11 14:27:58,098 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1008235117] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-11 14:27:58,098 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-11 14:27:58,098 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11, 9] total 29 [2024-10-11 14:27:58,098 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2046782115] [2024-10-11 14:27:58,098 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-11 14:27:58,099 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2024-10-11 14:27:58,100 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 14:27:58,101 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2024-10-11 14:27:58,102 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=695, Unknown=1, NotChecked=0, Total=812 [2024-10-11 14:27:58,102 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 31 [2024-10-11 14:27:58,102 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 249 places, 427 transitions, 6614 flow. Second operand has 29 states, 29 states have (on average 6.241379310344827) internal successors, (181), 29 states have internal predecessors, (181), 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) [2024-10-11 14:27:58,102 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 14:27:58,102 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 31 [2024-10-11 14:27:58,102 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 14:28:02,157 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1]