./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/weaver/popl20-more-buffer-series.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version a340643f Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../../../trunk/examples/svcomp/weaver/popl20-more-buffer-series.wvr.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 8dbd267b0e0821e8d358e8d234024d8e484ea32431972ed8b70b87052179a50c --- Real Ultimate output --- This is Ultimate 0.2.4-dev-a340643-m [2024-01-27 16:19:12,761 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-01-27 16:19:12,856 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-01-27 16:19:12,861 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-01-27 16:19:12,861 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-01-27 16:19:12,883 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-01-27 16:19:12,884 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-01-27 16:19:12,884 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-01-27 16:19:12,884 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-01-27 16:19:12,887 INFO L153 SettingsManager]: * Use memory slicer=true [2024-01-27 16:19:12,887 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-01-27 16:19:12,888 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-01-27 16:19:12,888 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-01-27 16:19:12,889 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-01-27 16:19:12,889 INFO L153 SettingsManager]: * Use SBE=true [2024-01-27 16:19:12,889 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-01-27 16:19:12,890 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-01-27 16:19:12,890 INFO L153 SettingsManager]: * sizeof long=4 [2024-01-27 16:19:12,890 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-01-27 16:19:12,890 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-01-27 16:19:12,890 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-01-27 16:19:12,900 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-01-27 16:19:12,900 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-01-27 16:19:12,900 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-01-27 16:19:12,900 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-01-27 16:19:12,901 INFO L153 SettingsManager]: * sizeof long double=12 [2024-01-27 16:19:12,901 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-01-27 16:19:12,901 INFO L153 SettingsManager]: * Use constant arrays=true [2024-01-27 16:19:12,902 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-01-27 16:19:12,902 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-01-27 16:19:12,903 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-01-27 16:19:12,903 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-01-27 16:19:12,903 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-01-27 16:19:12,903 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-01-27 16:19:12,903 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-01-27 16:19:12,903 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-01-27 16:19:12,904 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-01-27 16:19:12,904 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-01-27 16:19:12,904 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-01-27 16:19:12,904 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-01-27 16:19:12,904 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-01-27 16:19:12,904 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-01-27 16:19:12,905 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-01-27 16:19:12,905 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 8dbd267b0e0821e8d358e8d234024d8e484ea32431972ed8b70b87052179a50c [2024-01-27 16:19:13,279 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-01-27 16:19:13,301 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-01-27 16:19:13,304 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-01-27 16:19:13,304 INFO L270 PluginConnector]: Initializing CDTParser... [2024-01-27 16:19:13,305 INFO L274 PluginConnector]: CDTParser initialized [2024-01-27 16:19:13,306 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/popl20-more-buffer-series.wvr.c [2024-01-27 16:19:14,463 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-01-27 16:19:14,665 INFO L384 CDTParser]: Found 1 translation units. [2024-01-27 16:19:14,666 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-more-buffer-series.wvr.c [2024-01-27 16:19:14,675 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/050ab0a21/ddd3faa7fca141e393e54fa6864c7c20/FLAG3ff604dd3 [2024-01-27 16:19:14,689 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/050ab0a21/ddd3faa7fca141e393e54fa6864c7c20 [2024-01-27 16:19:14,691 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-01-27 16:19:14,692 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-01-27 16:19:14,703 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-01-27 16:19:14,703 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-01-27 16:19:14,707 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-01-27 16:19:14,708 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.01 04:19:14" (1/1) ... [2024-01-27 16:19:14,708 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@218fd546 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 04:19:14, skipping insertion in model container [2024-01-27 16:19:14,709 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.01 04:19:14" (1/1) ... [2024-01-27 16:19:14,727 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-01-27 16:19:14,862 WARN L239 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-more-buffer-series.wvr.c[4403,4416] [2024-01-27 16:19:14,872 INFO L209 PostProcessor]: Analyzing one entry point: main [2024-01-27 16:19:14,888 INFO L202 MainTranslator]: Completed pre-run [2024-01-27 16:19:14,914 WARN L239 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-more-buffer-series.wvr.c[4403,4416] [2024-01-27 16:19:14,917 INFO L209 PostProcessor]: Analyzing one entry point: main [2024-01-27 16:19:14,929 INFO L206 MainTranslator]: Completed translation [2024-01-27 16:19:14,930 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 04:19:14 WrapperNode [2024-01-27 16:19:14,930 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-01-27 16:19:14,931 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-01-27 16:19:14,931 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-01-27 16:19:14,931 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-01-27 16:19:14,937 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 04:19:14" (1/1) ... [2024-01-27 16:19:14,945 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 04:19:14" (1/1) ... [2024-01-27 16:19:14,979 INFO L138 Inliner]: procedures = 27, calls = 87, calls flagged for inlining = 22, calls inlined = 28, statements flattened = 364 [2024-01-27 16:19:14,980 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-01-27 16:19:14,981 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-01-27 16:19:14,981 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-01-27 16:19:14,981 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-01-27 16:19:14,991 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 04:19:14" (1/1) ... [2024-01-27 16:19:14,992 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 04:19:14" (1/1) ... [2024-01-27 16:19:14,996 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 04:19:14" (1/1) ... [2024-01-27 16:19:15,012 INFO L175 MemorySlicer]: Split 20 memory accesses to 6 slices as follows [2, 2, 2, 10, 2, 2]. 50 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0, 0, 0, 0, 0]. The 7 writes are split as follows [0, 1, 1, 3, 1, 1]. [2024-01-27 16:19:15,012 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 04:19:14" (1/1) ... [2024-01-27 16:19:15,012 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 04:19:14" (1/1) ... [2024-01-27 16:19:15,020 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 04:19:14" (1/1) ... [2024-01-27 16:19:15,024 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 04:19:14" (1/1) ... [2024-01-27 16:19:15,026 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 04:19:14" (1/1) ... [2024-01-27 16:19:15,027 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 04:19:14" (1/1) ... [2024-01-27 16:19:15,030 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-01-27 16:19:15,031 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-01-27 16:19:15,031 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-01-27 16:19:15,031 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-01-27 16:19:15,032 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 04:19:14" (1/1) ... [2024-01-27 16:19:15,036 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-01-27 16:19:15,047 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 16:19:15,102 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-01-27 16:19:15,152 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-01-27 16:19:15,193 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-01-27 16:19:15,193 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-01-27 16:19:15,194 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-01-27 16:19:15,194 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-01-27 16:19:15,194 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2024-01-27 16:19:15,194 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#3 [2024-01-27 16:19:15,194 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#4 [2024-01-27 16:19:15,194 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#5 [2024-01-27 16:19:15,194 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-01-27 16:19:15,195 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-01-27 16:19:15,195 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2024-01-27 16:19:15,195 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#3 [2024-01-27 16:19:15,195 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#4 [2024-01-27 16:19:15,195 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#5 [2024-01-27 16:19:15,195 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2024-01-27 16:19:15,196 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2024-01-27 16:19:15,196 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2024-01-27 16:19:15,196 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2024-01-27 16:19:15,196 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2024-01-27 16:19:15,196 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2024-01-27 16:19:15,196 INFO L130 BoogieDeclarations]: Found specification of procedure thread4 [2024-01-27 16:19:15,196 INFO L138 BoogieDeclarations]: Found implementation of procedure thread4 [2024-01-27 16:19:15,197 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-01-27 16:19:15,197 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-01-27 16:19:15,198 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2024-01-27 16:19:15,198 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#3 [2024-01-27 16:19:15,199 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#4 [2024-01-27 16:19:15,199 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#5 [2024-01-27 16:19:15,199 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-01-27 16:19:15,199 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-01-27 16:19:15,200 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-01-27 16:19:15,200 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-01-27 16:19:15,200 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-01-27 16:19:15,200 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-01-27 16:19:15,202 WARN L214 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2024-01-27 16:19:15,320 INFO L244 CfgBuilder]: Building ICFG [2024-01-27 16:19:15,322 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-01-27 16:19:15,746 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-01-27 16:19:15,747 INFO L293 CfgBuilder]: Performing block encoding [2024-01-27 16:19:16,104 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-01-27 16:19:16,104 INFO L320 CfgBuilder]: Removed 7 assume(true) statements. [2024-01-27 16:19:16,105 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.01 04:19:16 BoogieIcfgContainer [2024-01-27 16:19:16,105 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-01-27 16:19:16,107 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-01-27 16:19:16,107 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-01-27 16:19:16,109 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-01-27 16:19:16,109 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.01 04:19:14" (1/3) ... [2024-01-27 16:19:16,110 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@fdecd9e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.01 04:19:16, skipping insertion in model container [2024-01-27 16:19:16,110 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 04:19:14" (2/3) ... [2024-01-27 16:19:16,111 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@fdecd9e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.01 04:19:16, skipping insertion in model container [2024-01-27 16:19:16,111 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.01 04:19:16" (3/3) ... [2024-01-27 16:19:16,112 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-more-buffer-series.wvr.c [2024-01-27 16:19:16,120 WARN L146 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2024-01-27 16:19:16,128 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-01-27 16:19:16,128 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-01-27 16:19:16,128 INFO L518 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-01-27 16:19:16,177 INFO L144 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2024-01-27 16:19:16,209 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 61 places, 55 transitions, 138 flow [2024-01-27 16:19:16,244 INFO L124 PetriNetUnfolderBase]: 7/51 cut-off events. [2024-01-27 16:19:16,244 INFO L125 PetriNetUnfolderBase]: For 4/4 co-relation queries the response was YES. [2024-01-27 16:19:16,247 INFO L83 FinitePrefix]: Finished finitePrefix Result has 68 conditions, 51 events. 7/51 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 87 event pairs, 0 based on Foata normal form. 0/43 useless extension candidates. Maximal degree in co-relation 39. Up to 2 conditions per place. [2024-01-27 16:19:16,248 INFO L82 GeneralOperation]: Start removeDead. Operand has 61 places, 55 transitions, 138 flow [2024-01-27 16:19:16,250 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 56 places, 50 transitions, 124 flow [2024-01-27 16:19:16,262 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-01-27 16:19:16,268 INFO L357 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, mHoare=true, 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;@290ad6dc, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-01-27 16:19:16,268 INFO L358 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2024-01-27 16:19:16,286 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-01-27 16:19:16,286 INFO L124 PetriNetUnfolderBase]: 7/49 cut-off events. [2024-01-27 16:19:16,286 INFO L125 PetriNetUnfolderBase]: For 4/4 co-relation queries the response was YES. [2024-01-27 16:19:16,286 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 16:19:16,287 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 16:19:16,288 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2024-01-27 16:19:16,291 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 16:19:16,292 INFO L85 PathProgramCache]: Analyzing trace with hash 2047244802, now seen corresponding path program 1 times [2024-01-27 16:19:16,299 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 16:19:16,300 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1027380527] [2024-01-27 16:19:16,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 16:19:16,300 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 16:19:16,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 16:19:16,723 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 16:19:16,723 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 16:19:16,723 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1027380527] [2024-01-27 16:19:16,724 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1027380527] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-27 16:19:16,724 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-27 16:19:16,724 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-01-27 16:19:16,726 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2059763134] [2024-01-27 16:19:16,727 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-27 16:19:16,733 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-01-27 16:19:16,737 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 16:19:16,761 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-01-27 16:19:16,762 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-01-27 16:19:16,763 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 21 out of 55 [2024-01-27 16:19:16,765 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 50 transitions, 124 flow. Second operand has 3 states, 3 states have (on average 29.0) internal successors, (87), 3 states have internal predecessors, (87), 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) [2024-01-27 16:19:16,765 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 16:19:16,765 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 21 of 55 [2024-01-27 16:19:16,766 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 16:19:17,324 INFO L124 PetriNetUnfolderBase]: 2614/4015 cut-off events. [2024-01-27 16:19:17,324 INFO L125 PetriNetUnfolderBase]: For 203/203 co-relation queries the response was YES. [2024-01-27 16:19:17,331 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7557 conditions, 4015 events. 2614/4015 cut-off events. For 203/203 co-relation queries the response was YES. Maximal size of possible extension queue 261. Compared 23047 event pairs, 505 based on Foata normal form. 1/3781 useless extension candidates. Maximal degree in co-relation 6271. Up to 2275 conditions per place. [2024-01-27 16:19:17,349 INFO L140 encePairwiseOnDemand]: 51/55 looper letters, 49 selfloop transitions, 3 changer transitions 1/70 dead transitions. [2024-01-27 16:19:17,349 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 70 transitions, 285 flow [2024-01-27 16:19:17,350 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-01-27 16:19:17,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-01-27 16:19:17,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 117 transitions. [2024-01-27 16:19:17,359 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7090909090909091 [2024-01-27 16:19:17,360 INFO L175 Difference]: Start difference. First operand has 56 places, 50 transitions, 124 flow. Second operand 3 states and 117 transitions. [2024-01-27 16:19:17,361 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 70 transitions, 285 flow [2024-01-27 16:19:17,366 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 70 transitions, 259 flow, removed 0 selfloop flow, removed 8 redundant places. [2024-01-27 16:19:17,368 INFO L231 Difference]: Finished difference. Result has 51 places, 52 transitions, 127 flow [2024-01-27 16:19:17,370 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=55, PETRI_DIFFERENCE_MINUEND_FLOW=108, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=127, PETRI_PLACES=51, PETRI_TRANSITIONS=52} [2024-01-27 16:19:17,372 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, -5 predicate places. [2024-01-27 16:19:17,372 INFO L495 AbstractCegarLoop]: Abstraction has has 51 places, 52 transitions, 127 flow [2024-01-27 16:19:17,373 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 29.0) internal successors, (87), 3 states have internal predecessors, (87), 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) [2024-01-27 16:19:17,373 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 16:19:17,373 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 16:19:17,373 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-01-27 16:19:17,373 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2024-01-27 16:19:17,374 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 16:19:17,374 INFO L85 PathProgramCache]: Analyzing trace with hash 1025146033, now seen corresponding path program 1 times [2024-01-27 16:19:17,374 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 16:19:17,374 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [638853740] [2024-01-27 16:19:17,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 16:19:17,375 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 16:19:17,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 16:19:17,477 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 16:19:17,477 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 16:19:17,477 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [638853740] [2024-01-27 16:19:17,477 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [638853740] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-27 16:19:17,477 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-27 16:19:17,478 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-01-27 16:19:17,478 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [868634582] [2024-01-27 16:19:17,478 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-27 16:19:17,479 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-01-27 16:19:17,479 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 16:19:17,480 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-01-27 16:19:17,480 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-01-27 16:19:17,483 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 21 out of 55 [2024-01-27 16:19:17,483 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 52 transitions, 127 flow. Second operand has 3 states, 3 states have (on average 29.333333333333332) internal successors, (88), 3 states have internal predecessors, (88), 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) [2024-01-27 16:19:17,484 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 16:19:17,484 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 21 of 55 [2024-01-27 16:19:17,484 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 16:19:17,852 INFO L124 PetriNetUnfolderBase]: 2708/4027 cut-off events. [2024-01-27 16:19:17,852 INFO L125 PetriNetUnfolderBase]: For 724/724 co-relation queries the response was YES. [2024-01-27 16:19:17,856 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8506 conditions, 4027 events. 2708/4027 cut-off events. For 724/724 co-relation queries the response was YES. Maximal size of possible extension queue 255. Compared 22731 event pairs, 651 based on Foata normal form. 96/3945 useless extension candidates. Maximal degree in co-relation 2885. Up to 2592 conditions per place. [2024-01-27 16:19:17,868 INFO L140 encePairwiseOnDemand]: 52/55 looper letters, 57 selfloop transitions, 2 changer transitions 0/76 dead transitions. [2024-01-27 16:19:17,869 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 76 transitions, 307 flow [2024-01-27 16:19:17,869 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-01-27 16:19:17,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-01-27 16:19:17,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 120 transitions. [2024-01-27 16:19:17,870 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7272727272727273 [2024-01-27 16:19:17,870 INFO L175 Difference]: Start difference. First operand has 51 places, 52 transitions, 127 flow. Second operand 3 states and 120 transitions. [2024-01-27 16:19:17,871 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 76 transitions, 307 flow [2024-01-27 16:19:17,872 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 52 places, 76 transitions, 303 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-01-27 16:19:17,873 INFO L231 Difference]: Finished difference. Result has 53 places, 53 transitions, 138 flow [2024-01-27 16:19:17,873 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=55, PETRI_DIFFERENCE_MINUEND_FLOW=124, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=52, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=138, PETRI_PLACES=53, PETRI_TRANSITIONS=53} [2024-01-27 16:19:17,873 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, -3 predicate places. [2024-01-27 16:19:17,874 INFO L495 AbstractCegarLoop]: Abstraction has has 53 places, 53 transitions, 138 flow [2024-01-27 16:19:17,874 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 29.333333333333332) internal successors, (88), 3 states have internal predecessors, (88), 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) [2024-01-27 16:19:17,874 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 16:19:17,874 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 16:19:17,874 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-01-27 16:19:17,875 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2024-01-27 16:19:17,875 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 16:19:17,875 INFO L85 PathProgramCache]: Analyzing trace with hash 560322323, now seen corresponding path program 1 times [2024-01-27 16:19:17,875 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 16:19:17,875 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1217723835] [2024-01-27 16:19:17,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 16:19:17,876 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 16:19:17,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 16:19:17,972 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 16:19:17,972 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 16:19:17,972 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1217723835] [2024-01-27 16:19:17,972 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1217723835] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-27 16:19:17,973 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-27 16:19:17,973 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-01-27 16:19:17,973 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1006690404] [2024-01-27 16:19:17,973 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-27 16:19:17,974 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-01-27 16:19:17,974 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 16:19:17,975 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-01-27 16:19:17,975 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-01-27 16:19:17,978 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 21 out of 55 [2024-01-27 16:19:17,978 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 53 transitions, 138 flow. Second operand has 3 states, 3 states have (on average 29.333333333333332) internal successors, (88), 3 states have internal predecessors, (88), 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) [2024-01-27 16:19:17,978 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 16:19:17,979 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 21 of 55 [2024-01-27 16:19:17,979 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 16:19:18,368 INFO L124 PetriNetUnfolderBase]: 2668/4245 cut-off events. [2024-01-27 16:19:18,368 INFO L125 PetriNetUnfolderBase]: For 1586/1586 co-relation queries the response was YES. [2024-01-27 16:19:18,375 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9218 conditions, 4245 events. 2668/4245 cut-off events. For 1586/1586 co-relation queries the response was YES. Maximal size of possible extension queue 251. Compared 26333 event pairs, 655 based on Foata normal form. 62/4152 useless extension candidates. Maximal degree in co-relation 6691. Up to 2665 conditions per place. [2024-01-27 16:19:18,390 INFO L140 encePairwiseOnDemand]: 52/55 looper letters, 57 selfloop transitions, 2 changer transitions 0/76 dead transitions. [2024-01-27 16:19:18,391 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 76 transitions, 323 flow [2024-01-27 16:19:18,391 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-01-27 16:19:18,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-01-27 16:19:18,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 118 transitions. [2024-01-27 16:19:18,392 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7151515151515152 [2024-01-27 16:19:18,392 INFO L175 Difference]: Start difference. First operand has 53 places, 53 transitions, 138 flow. Second operand 3 states and 118 transitions. [2024-01-27 16:19:18,393 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 76 transitions, 323 flow [2024-01-27 16:19:18,393 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 76 transitions, 320 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-01-27 16:19:18,394 INFO L231 Difference]: Finished difference. Result has 55 places, 54 transitions, 150 flow [2024-01-27 16:19:18,394 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=55, PETRI_DIFFERENCE_MINUEND_FLOW=136, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=53, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=150, PETRI_PLACES=55, PETRI_TRANSITIONS=54} [2024-01-27 16:19:18,395 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, -1 predicate places. [2024-01-27 16:19:18,395 INFO L495 AbstractCegarLoop]: Abstraction has has 55 places, 54 transitions, 150 flow [2024-01-27 16:19:18,396 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 29.333333333333332) internal successors, (88), 3 states have internal predecessors, (88), 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) [2024-01-27 16:19:18,396 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 16:19:18,396 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 16:19:18,396 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-01-27 16:19:18,396 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2024-01-27 16:19:18,397 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 16:19:18,397 INFO L85 PathProgramCache]: Analyzing trace with hash -1263693964, now seen corresponding path program 1 times [2024-01-27 16:19:18,397 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 16:19:18,397 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [147602255] [2024-01-27 16:19:18,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 16:19:18,398 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 16:19:18,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 16:19:18,532 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-01-27 16:19:18,532 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 16:19:18,533 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [147602255] [2024-01-27 16:19:18,533 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [147602255] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-27 16:19:18,533 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-27 16:19:18,533 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-01-27 16:19:18,533 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1768651370] [2024-01-27 16:19:18,533 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-27 16:19:18,534 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-01-27 16:19:18,534 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 16:19:18,535 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-01-27 16:19:18,535 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-01-27 16:19:18,535 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 21 out of 55 [2024-01-27 16:19:18,535 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 54 transitions, 150 flow. Second operand has 4 states, 4 states have (on average 27.75) internal successors, (111), 4 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 16:19:18,536 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 16:19:18,536 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 21 of 55 [2024-01-27 16:19:18,536 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 16:19:18,959 INFO L124 PetriNetUnfolderBase]: 3181/4981 cut-off events. [2024-01-27 16:19:18,960 INFO L125 PetriNetUnfolderBase]: For 2596/2596 co-relation queries the response was YES. [2024-01-27 16:19:18,968 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11613 conditions, 4981 events. 3181/4981 cut-off events. For 2596/2596 co-relation queries the response was YES. Maximal size of possible extension queue 291. Compared 33088 event pairs, 2375 based on Foata normal form. 93/4572 useless extension candidates. Maximal degree in co-relation 5288. Up to 3497 conditions per place. [2024-01-27 16:19:18,983 INFO L140 encePairwiseOnDemand]: 47/55 looper letters, 65 selfloop transitions, 7 changer transitions 0/89 dead transitions. [2024-01-27 16:19:18,983 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 59 places, 89 transitions, 387 flow [2024-01-27 16:19:18,984 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-01-27 16:19:18,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-01-27 16:19:18,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 172 transitions. [2024-01-27 16:19:18,985 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6254545454545455 [2024-01-27 16:19:18,985 INFO L175 Difference]: Start difference. First operand has 55 places, 54 transitions, 150 flow. Second operand 5 states and 172 transitions. [2024-01-27 16:19:18,985 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 59 places, 89 transitions, 387 flow [2024-01-27 16:19:18,986 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 89 transitions, 384 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-01-27 16:19:18,987 INFO L231 Difference]: Finished difference. Result has 61 places, 60 transitions, 200 flow [2024-01-27 16:19:18,988 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=55, PETRI_DIFFERENCE_MINUEND_FLOW=148, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=54, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=200, PETRI_PLACES=61, PETRI_TRANSITIONS=60} [2024-01-27 16:19:18,988 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 5 predicate places. [2024-01-27 16:19:18,989 INFO L495 AbstractCegarLoop]: Abstraction has has 61 places, 60 transitions, 200 flow [2024-01-27 16:19:18,989 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 27.75) internal successors, (111), 4 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 16:19:18,989 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 16:19:18,989 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 16:19:18,989 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-01-27 16:19:18,989 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2024-01-27 16:19:18,990 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 16:19:18,990 INFO L85 PathProgramCache]: Analyzing trace with hash -1826608772, now seen corresponding path program 1 times [2024-01-27 16:19:18,990 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 16:19:18,990 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [55124247] [2024-01-27 16:19:18,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 16:19:18,991 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 16:19:19,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 16:19:19,090 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-01-27 16:19:19,090 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 16:19:19,091 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [55124247] [2024-01-27 16:19:19,091 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [55124247] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-27 16:19:19,091 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-27 16:19:19,091 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-01-27 16:19:19,091 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [58593678] [2024-01-27 16:19:19,091 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-27 16:19:19,092 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-01-27 16:19:19,092 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 16:19:19,092 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-01-27 16:19:19,092 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-01-27 16:19:19,093 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 21 out of 55 [2024-01-27 16:19:19,093 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 60 transitions, 200 flow. Second operand has 4 states, 4 states have (on average 27.75) internal successors, (111), 4 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 16:19:19,093 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 16:19:19,093 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 21 of 55 [2024-01-27 16:19:19,094 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 16:19:19,667 INFO L124 PetriNetUnfolderBase]: 3924/6374 cut-off events. [2024-01-27 16:19:19,667 INFO L125 PetriNetUnfolderBase]: For 3290/3290 co-relation queries the response was YES. [2024-01-27 16:19:19,676 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14493 conditions, 6374 events. 3924/6374 cut-off events. For 3290/3290 co-relation queries the response was YES. Maximal size of possible extension queue 363. Compared 45828 event pairs, 3013 based on Foata normal form. 154/5930 useless extension candidates. Maximal degree in co-relation 11716. Up to 4412 conditions per place. [2024-01-27 16:19:19,693 INFO L140 encePairwiseOnDemand]: 49/55 looper letters, 67 selfloop transitions, 7 changer transitions 2/93 dead transitions. [2024-01-27 16:19:19,693 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 93 transitions, 462 flow [2024-01-27 16:19:19,694 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-01-27 16:19:19,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-01-27 16:19:19,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 168 transitions. [2024-01-27 16:19:19,694 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.610909090909091 [2024-01-27 16:19:19,695 INFO L175 Difference]: Start difference. First operand has 61 places, 60 transitions, 200 flow. Second operand 5 states and 168 transitions. [2024-01-27 16:19:19,695 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 93 transitions, 462 flow [2024-01-27 16:19:19,696 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 93 transitions, 458 flow, removed 1 selfloop flow, removed 1 redundant places. [2024-01-27 16:19:19,697 INFO L231 Difference]: Finished difference. Result has 67 places, 64 transitions, 250 flow [2024-01-27 16:19:19,697 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=55, PETRI_DIFFERENCE_MINUEND_FLOW=196, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=60, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=250, PETRI_PLACES=67, PETRI_TRANSITIONS=64} [2024-01-27 16:19:19,698 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 11 predicate places. [2024-01-27 16:19:19,698 INFO L495 AbstractCegarLoop]: Abstraction has has 67 places, 64 transitions, 250 flow [2024-01-27 16:19:19,698 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 27.75) internal successors, (111), 4 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 16:19:19,699 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 16:19:19,699 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 16:19:19,699 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-01-27 16:19:19,699 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2024-01-27 16:19:19,699 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 16:19:19,700 INFO L85 PathProgramCache]: Analyzing trace with hash 507727392, now seen corresponding path program 1 times [2024-01-27 16:19:19,700 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 16:19:19,700 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1687679504] [2024-01-27 16:19:19,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 16:19:19,700 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 16:19:19,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 16:19:19,971 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-01-27 16:19:19,972 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 16:19:19,972 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1687679504] [2024-01-27 16:19:19,972 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1687679504] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-27 16:19:19,972 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-27 16:19:19,972 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-01-27 16:19:19,973 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [87996166] [2024-01-27 16:19:19,973 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-27 16:19:19,973 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-01-27 16:19:19,974 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 16:19:19,974 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-01-27 16:19:19,974 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-01-27 16:19:20,008 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 55 [2024-01-27 16:19:20,009 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 64 transitions, 250 flow. Second operand has 6 states, 6 states have (on average 23.166666666666668) internal successors, (139), 6 states have internal predecessors, (139), 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) [2024-01-27 16:19:20,009 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 16:19:20,009 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 55 [2024-01-27 16:19:20,010 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 16:19:21,366 INFO L124 PetriNetUnfolderBase]: 8696/13302 cut-off events. [2024-01-27 16:19:21,366 INFO L125 PetriNetUnfolderBase]: For 6280/6297 co-relation queries the response was YES. [2024-01-27 16:19:21,395 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30811 conditions, 13302 events. 8696/13302 cut-off events. For 6280/6297 co-relation queries the response was YES. Maximal size of possible extension queue 727. Compared 95503 event pairs, 3682 based on Foata normal form. 0/12109 useless extension candidates. Maximal degree in co-relation 23566. Up to 5050 conditions per place. [2024-01-27 16:19:21,438 INFO L140 encePairwiseOnDemand]: 48/55 looper letters, 109 selfloop transitions, 11 changer transitions 1/135 dead transitions. [2024-01-27 16:19:21,438 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 135 transitions, 714 flow [2024-01-27 16:19:21,439 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-01-27 16:19:21,439 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-01-27 16:19:21,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 210 transitions. [2024-01-27 16:19:21,440 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6363636363636364 [2024-01-27 16:19:21,440 INFO L175 Difference]: Start difference. First operand has 67 places, 64 transitions, 250 flow. Second operand 6 states and 210 transitions. [2024-01-27 16:19:21,440 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 135 transitions, 714 flow [2024-01-27 16:19:21,445 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 135 transitions, 702 flow, removed 4 selfloop flow, removed 1 redundant places. [2024-01-27 16:19:21,447 INFO L231 Difference]: Finished difference. Result has 75 places, 67 transitions, 298 flow [2024-01-27 16:19:21,448 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=55, PETRI_DIFFERENCE_MINUEND_FLOW=238, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=64, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=298, PETRI_PLACES=75, PETRI_TRANSITIONS=67} [2024-01-27 16:19:21,450 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 19 predicate places. [2024-01-27 16:19:21,450 INFO L495 AbstractCegarLoop]: Abstraction has has 75 places, 67 transitions, 298 flow [2024-01-27 16:19:21,450 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 23.166666666666668) internal successors, (139), 6 states have internal predecessors, (139), 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) [2024-01-27 16:19:21,450 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 16:19:21,451 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 16:19:21,451 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-01-27 16:19:21,451 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2024-01-27 16:19:21,451 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 16:19:21,452 INFO L85 PathProgramCache]: Analyzing trace with hash 1835152474, now seen corresponding path program 1 times [2024-01-27 16:19:21,452 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 16:19:21,452 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1889281127] [2024-01-27 16:19:21,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 16:19:21,452 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 16:19:21,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 16:19:21,863 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-01-27 16:19:21,864 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 16:19:21,864 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1889281127] [2024-01-27 16:19:21,864 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1889281127] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-27 16:19:21,880 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-27 16:19:21,880 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-01-27 16:19:21,880 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [332007837] [2024-01-27 16:19:21,881 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-27 16:19:21,881 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-01-27 16:19:21,881 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 16:19:21,882 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-01-27 16:19:21,882 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-01-27 16:19:21,914 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 55 [2024-01-27 16:19:21,915 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 67 transitions, 298 flow. Second operand has 6 states, 6 states have (on average 23.166666666666668) internal successors, (139), 6 states have internal predecessors, (139), 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) [2024-01-27 16:19:21,915 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 16:19:21,915 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 55 [2024-01-27 16:19:21,915 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 16:19:23,558 INFO L124 PetriNetUnfolderBase]: 10091/15089 cut-off events. [2024-01-27 16:19:23,558 INFO L125 PetriNetUnfolderBase]: For 7307/7415 co-relation queries the response was YES. [2024-01-27 16:19:23,593 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35608 conditions, 15089 events. 10091/15089 cut-off events. For 7307/7415 co-relation queries the response was YES. Maximal size of possible extension queue 835. Compared 106519 event pairs, 3531 based on Foata normal form. 0/14101 useless extension candidates. Maximal degree in co-relation 28004. Up to 9090 conditions per place. [2024-01-27 16:19:23,637 INFO L140 encePairwiseOnDemand]: 48/55 looper letters, 84 selfloop transitions, 13 changer transitions 12/124 dead transitions. [2024-01-27 16:19:23,637 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 80 places, 124 transitions, 676 flow [2024-01-27 16:19:23,638 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-01-27 16:19:23,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-01-27 16:19:23,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 202 transitions. [2024-01-27 16:19:23,639 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6121212121212121 [2024-01-27 16:19:23,639 INFO L175 Difference]: Start difference. First operand has 75 places, 67 transitions, 298 flow. Second operand 6 states and 202 transitions. [2024-01-27 16:19:23,639 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 80 places, 124 transitions, 676 flow [2024-01-27 16:19:23,643 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 124 transitions, 665 flow, removed 4 selfloop flow, removed 1 redundant places. [2024-01-27 16:19:23,644 INFO L231 Difference]: Finished difference. Result has 81 places, 70 transitions, 338 flow [2024-01-27 16:19:23,644 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=55, PETRI_DIFFERENCE_MINUEND_FLOW=288, PETRI_DIFFERENCE_MINUEND_PLACES=74, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=67, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=338, PETRI_PLACES=81, PETRI_TRANSITIONS=70} [2024-01-27 16:19:23,645 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 25 predicate places. [2024-01-27 16:19:23,645 INFO L495 AbstractCegarLoop]: Abstraction has has 81 places, 70 transitions, 338 flow [2024-01-27 16:19:23,645 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 23.166666666666668) internal successors, (139), 6 states have internal predecessors, (139), 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) [2024-01-27 16:19:23,645 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 16:19:23,645 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 16:19:23,646 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-01-27 16:19:23,646 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2024-01-27 16:19:23,646 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 16:19:23,646 INFO L85 PathProgramCache]: Analyzing trace with hash 709788828, now seen corresponding path program 2 times [2024-01-27 16:19:23,647 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 16:19:23,647 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1780175681] [2024-01-27 16:19:23,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 16:19:23,647 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 16:19:23,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 16:19:23,831 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-01-27 16:19:23,832 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 16:19:23,832 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1780175681] [2024-01-27 16:19:23,832 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1780175681] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-27 16:19:23,832 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-27 16:19:23,832 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-01-27 16:19:23,832 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1395244671] [2024-01-27 16:19:23,833 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-27 16:19:23,833 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-01-27 16:19:23,833 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 16:19:23,834 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-01-27 16:19:23,834 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-01-27 16:19:23,861 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 55 [2024-01-27 16:19:23,862 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 81 places, 70 transitions, 338 flow. Second operand has 6 states, 6 states have (on average 23.166666666666668) internal successors, (139), 6 states have internal predecessors, (139), 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) [2024-01-27 16:19:23,862 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 16:19:23,862 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 55 [2024-01-27 16:19:23,862 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 16:19:25,267 INFO L124 PetriNetUnfolderBase]: 9371/13973 cut-off events. [2024-01-27 16:19:25,269 INFO L125 PetriNetUnfolderBase]: For 8165/8221 co-relation queries the response was YES. [2024-01-27 16:19:25,314 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34152 conditions, 13973 events. 9371/13973 cut-off events. For 8165/8221 co-relation queries the response was YES. Maximal size of possible extension queue 722. Compared 96932 event pairs, 3876 based on Foata normal form. 0/12696 useless extension candidates. Maximal degree in co-relation 29156. Up to 6234 conditions per place. [2024-01-27 16:19:25,358 INFO L140 encePairwiseOnDemand]: 48/55 looper letters, 69 selfloop transitions, 8 changer transitions 34/125 dead transitions. [2024-01-27 16:19:25,358 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 86 places, 125 transitions, 697 flow [2024-01-27 16:19:25,359 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-01-27 16:19:25,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-01-27 16:19:25,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 201 transitions. [2024-01-27 16:19:25,360 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6090909090909091 [2024-01-27 16:19:25,360 INFO L175 Difference]: Start difference. First operand has 81 places, 70 transitions, 338 flow. Second operand 6 states and 201 transitions. [2024-01-27 16:19:25,360 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 86 places, 125 transitions, 697 flow [2024-01-27 16:19:25,371 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 83 places, 125 transitions, 685 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-01-27 16:19:25,373 INFO L231 Difference]: Finished difference. Result has 86 places, 65 transitions, 302 flow [2024-01-27 16:19:25,373 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=55, PETRI_DIFFERENCE_MINUEND_FLOW=308, PETRI_DIFFERENCE_MINUEND_PLACES=78, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=68, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=302, PETRI_PLACES=86, PETRI_TRANSITIONS=65} [2024-01-27 16:19:25,374 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 30 predicate places. [2024-01-27 16:19:25,374 INFO L495 AbstractCegarLoop]: Abstraction has has 86 places, 65 transitions, 302 flow [2024-01-27 16:19:25,374 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 23.166666666666668) internal successors, (139), 6 states have internal predecessors, (139), 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) [2024-01-27 16:19:25,374 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 16:19:25,374 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 16:19:25,375 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-01-27 16:19:25,375 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2024-01-27 16:19:25,375 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 16:19:25,376 INFO L85 PathProgramCache]: Analyzing trace with hash -1591045695, now seen corresponding path program 1 times [2024-01-27 16:19:25,376 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 16:19:25,376 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1284519634] [2024-01-27 16:19:25,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 16:19:25,376 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 16:19:25,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 16:19:25,768 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-01-27 16:19:25,768 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 16:19:25,768 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1284519634] [2024-01-27 16:19:25,768 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1284519634] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 16:19:25,769 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1737791509] [2024-01-27 16:19:25,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 16:19:25,769 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 16:19:25,769 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 16:19:25,783 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-27 16:19:25,797 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-01-27 16:19:25,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 16:19:25,939 INFO L262 TraceCheckSpWp]: Trace formula consists of 373 conjuncts, 12 conjunts are in the unsatisfiable core [2024-01-27 16:19:25,945 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 16:19:26,171 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-01-27 16:19:26,171 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 16:19:26,294 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-01-27 16:19:26,300 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1737791509] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 16:19:26,300 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 16:19:26,300 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 7] total 17 [2024-01-27 16:19:26,300 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1975290272] [2024-01-27 16:19:26,300 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 16:19:26,301 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-01-27 16:19:26,302 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 16:19:26,303 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-01-27 16:19:26,303 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=227, Unknown=0, NotChecked=0, Total=306 [2024-01-27 16:19:26,430 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 55 [2024-01-27 16:19:26,431 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 65 transitions, 302 flow. Second operand has 18 states, 18 states have (on average 21.5) internal successors, (387), 18 states have internal predecessors, (387), 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) [2024-01-27 16:19:26,431 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 16:19:26,431 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 55 [2024-01-27 16:19:26,431 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 16:19:28,532 INFO L124 PetriNetUnfolderBase]: 13077/19216 cut-off events. [2024-01-27 16:19:28,532 INFO L125 PetriNetUnfolderBase]: For 10742/10742 co-relation queries the response was YES. [2024-01-27 16:19:28,578 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48631 conditions, 19216 events. 13077/19216 cut-off events. For 10742/10742 co-relation queries the response was YES. Maximal size of possible extension queue 1040. Compared 133880 event pairs, 1059 based on Foata normal form. 0/18657 useless extension candidates. Maximal degree in co-relation 44124. Up to 4436 conditions per place. [2024-01-27 16:19:28,626 INFO L140 encePairwiseOnDemand]: 45/55 looper letters, 152 selfloop transitions, 18 changer transitions 14/198 dead transitions. [2024-01-27 16:19:28,627 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 91 places, 198 transitions, 1128 flow [2024-01-27 16:19:28,627 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-01-27 16:19:28,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-01-27 16:19:28,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 368 transitions. [2024-01-27 16:19:28,629 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5575757575757576 [2024-01-27 16:19:28,629 INFO L175 Difference]: Start difference. First operand has 86 places, 65 transitions, 302 flow. Second operand 12 states and 368 transitions. [2024-01-27 16:19:28,629 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 91 places, 198 transitions, 1128 flow [2024-01-27 16:19:28,651 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 83 places, 198 transitions, 1101 flow, removed 6 selfloop flow, removed 8 redundant places. [2024-01-27 16:19:28,653 INFO L231 Difference]: Finished difference. Result has 85 places, 70 transitions, 327 flow [2024-01-27 16:19:28,653 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=55, PETRI_DIFFERENCE_MINUEND_FLOW=282, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=65, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=327, PETRI_PLACES=85, PETRI_TRANSITIONS=70} [2024-01-27 16:19:28,654 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 29 predicate places. [2024-01-27 16:19:28,654 INFO L495 AbstractCegarLoop]: Abstraction has has 85 places, 70 transitions, 327 flow [2024-01-27 16:19:28,655 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 21.5) internal successors, (387), 18 states have internal predecessors, (387), 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) [2024-01-27 16:19:28,655 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 16:19:28,655 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 16:19:28,670 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2024-01-27 16:19:28,869 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 16:19:28,869 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2024-01-27 16:19:28,870 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 16:19:28,870 INFO L85 PathProgramCache]: Analyzing trace with hash 1644713553, now seen corresponding path program 2 times [2024-01-27 16:19:28,870 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 16:19:28,871 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1284289163] [2024-01-27 16:19:28,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 16:19:28,871 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 16:19:28,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 16:19:29,100 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-01-27 16:19:29,100 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 16:19:29,100 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1284289163] [2024-01-27 16:19:29,101 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1284289163] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-27 16:19:29,101 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-27 16:19:29,101 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-01-27 16:19:29,101 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1906946771] [2024-01-27 16:19:29,102 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-27 16:19:29,102 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-01-27 16:19:29,102 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 16:19:29,103 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-01-27 16:19:29,103 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-01-27 16:19:29,143 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 55 [2024-01-27 16:19:29,144 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 85 places, 70 transitions, 327 flow. Second operand has 6 states, 6 states have (on average 24.0) internal successors, (144), 6 states have internal predecessors, (144), 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) [2024-01-27 16:19:29,144 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 16:19:29,144 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 55 [2024-01-27 16:19:29,144 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 16:19:30,765 INFO L124 PetriNetUnfolderBase]: 10006/15197 cut-off events. [2024-01-27 16:19:30,766 INFO L125 PetriNetUnfolderBase]: For 19274/19742 co-relation queries the response was YES. [2024-01-27 16:19:30,792 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42986 conditions, 15197 events. 10006/15197 cut-off events. For 19274/19742 co-relation queries the response was YES. Maximal size of possible extension queue 771. Compared 105777 event pairs, 1870 based on Foata normal form. 756/15684 useless extension candidates. Maximal degree in co-relation 42951. Up to 6918 conditions per place. [2024-01-27 16:19:30,831 INFO L140 encePairwiseOnDemand]: 47/55 looper letters, 106 selfloop transitions, 9 changer transitions 11/146 dead transitions. [2024-01-27 16:19:30,831 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 89 places, 146 transitions, 931 flow [2024-01-27 16:19:30,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-01-27 16:19:30,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-01-27 16:19:30,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 224 transitions. [2024-01-27 16:19:30,832 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5818181818181818 [2024-01-27 16:19:30,832 INFO L175 Difference]: Start difference. First operand has 85 places, 70 transitions, 327 flow. Second operand 7 states and 224 transitions. [2024-01-27 16:19:30,833 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 89 places, 146 transitions, 931 flow [2024-01-27 16:19:30,845 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 84 places, 146 transitions, 862 flow, removed 20 selfloop flow, removed 5 redundant places. [2024-01-27 16:19:30,846 INFO L231 Difference]: Finished difference. Result has 87 places, 74 transitions, 340 flow [2024-01-27 16:19:30,846 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=55, PETRI_DIFFERENCE_MINUEND_FLOW=294, PETRI_DIFFERENCE_MINUEND_PLACES=78, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=70, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=340, PETRI_PLACES=87, PETRI_TRANSITIONS=74} [2024-01-27 16:19:30,847 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 31 predicate places. [2024-01-27 16:19:30,847 INFO L495 AbstractCegarLoop]: Abstraction has has 87 places, 74 transitions, 340 flow [2024-01-27 16:19:30,847 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 24.0) internal successors, (144), 6 states have internal predecessors, (144), 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) [2024-01-27 16:19:30,847 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 16:19:30,847 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 16:19:30,847 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-01-27 16:19:30,847 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2024-01-27 16:19:30,848 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 16:19:30,848 INFO L85 PathProgramCache]: Analyzing trace with hash 1297443516, now seen corresponding path program 1 times [2024-01-27 16:19:30,848 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 16:19:30,848 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [819397848] [2024-01-27 16:19:30,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 16:19:30,848 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 16:19:30,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 16:19:31,007 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-01-27 16:19:31,007 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 16:19:31,007 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [819397848] [2024-01-27 16:19:31,007 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [819397848] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 16:19:31,008 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [422212245] [2024-01-27 16:19:31,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 16:19:31,008 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 16:19:31,008 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 16:19:31,009 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-27 16:19:31,035 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-01-27 16:19:31,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 16:19:31,139 INFO L262 TraceCheckSpWp]: Trace formula consists of 393 conjuncts, 9 conjunts are in the unsatisfiable core [2024-01-27 16:19:31,141 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 16:19:31,171 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-01-27 16:19:31,171 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 16:19:31,239 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-01-27 16:19:31,240 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [422212245] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 16:19:31,240 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 16:19:31,240 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 6] total 8 [2024-01-27 16:19:31,240 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1787301782] [2024-01-27 16:19:31,240 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 16:19:31,241 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-01-27 16:19:31,241 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 16:19:31,241 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-01-27 16:19:31,241 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-01-27 16:19:31,253 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 55 [2024-01-27 16:19:31,253 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 87 places, 74 transitions, 340 flow. Second operand has 9 states, 9 states have (on average 20.77777777777778) internal successors, (187), 9 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) [2024-01-27 16:19:31,254 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 16:19:31,254 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 55 [2024-01-27 16:19:31,254 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 16:19:36,567 INFO L124 PetriNetUnfolderBase]: 39951/55989 cut-off events. [2024-01-27 16:19:36,568 INFO L125 PetriNetUnfolderBase]: For 71168/71988 co-relation queries the response was YES. [2024-01-27 16:19:36,819 INFO L83 FinitePrefix]: Finished finitePrefix Result has 169587 conditions, 55989 events. 39951/55989 cut-off events. For 71168/71988 co-relation queries the response was YES. Maximal size of possible extension queue 2342. Compared 389200 event pairs, 2103 based on Foata normal form. 778/56648 useless extension candidates. Maximal degree in co-relation 169551. Up to 10842 conditions per place. [2024-01-27 16:19:37,014 INFO L140 encePairwiseOnDemand]: 46/55 looper letters, 357 selfloop transitions, 94 changer transitions 22/484 dead transitions. [2024-01-27 16:19:37,015 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 104 places, 484 transitions, 3035 flow [2024-01-27 16:19:37,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2024-01-27 16:19:37,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2024-01-27 16:19:37,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 643 transitions. [2024-01-27 16:19:37,021 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5845454545454546 [2024-01-27 16:19:37,021 INFO L175 Difference]: Start difference. First operand has 87 places, 74 transitions, 340 flow. Second operand 20 states and 643 transitions. [2024-01-27 16:19:37,021 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 104 places, 484 transitions, 3035 flow [2024-01-27 16:19:37,153 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 98 places, 484 transitions, 2990 flow, removed 14 selfloop flow, removed 6 redundant places. [2024-01-27 16:19:37,157 INFO L231 Difference]: Finished difference. Result has 112 places, 169 transitions, 1205 flow [2024-01-27 16:19:37,157 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=55, PETRI_DIFFERENCE_MINUEND_FLOW=321, PETRI_DIFFERENCE_MINUEND_PLACES=79, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=74, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=1205, PETRI_PLACES=112, PETRI_TRANSITIONS=169} [2024-01-27 16:19:37,157 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 56 predicate places. [2024-01-27 16:19:37,158 INFO L495 AbstractCegarLoop]: Abstraction has has 112 places, 169 transitions, 1205 flow [2024-01-27 16:19:37,158 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 20.77777777777778) internal successors, (187), 9 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) [2024-01-27 16:19:37,158 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 16:19:37,158 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 16:19:37,170 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2024-01-27 16:19:37,370 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2024-01-27 16:19:37,371 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2024-01-27 16:19:37,372 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 16:19:37,372 INFO L85 PathProgramCache]: Analyzing trace with hash -1053116008, now seen corresponding path program 1 times [2024-01-27 16:19:37,372 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 16:19:37,372 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [927145098] [2024-01-27 16:19:37,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 16:19:37,372 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 16:19:37,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 16:19:37,539 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-01-27 16:19:37,540 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 16:19:37,541 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [927145098] [2024-01-27 16:19:37,541 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [927145098] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 16:19:37,541 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [909470558] [2024-01-27 16:19:37,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 16:19:37,542 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 16:19:37,542 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 16:19:37,544 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-27 16:19:37,574 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-01-27 16:19:37,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 16:19:37,703 INFO L262 TraceCheckSpWp]: Trace formula consists of 393 conjuncts, 9 conjunts are in the unsatisfiable core [2024-01-27 16:19:37,707 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 16:19:37,801 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-01-27 16:19:37,802 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 16:19:37,924 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-01-27 16:19:37,925 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [909470558] provided 1 perfect and 1 imperfect interpolant sequences [2024-01-27 16:19:37,925 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-01-27 16:19:37,925 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [4, 5] total 10 [2024-01-27 16:19:37,925 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [593379668] [2024-01-27 16:19:37,925 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-27 16:19:37,926 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-01-27 16:19:37,926 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 16:19:37,926 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-01-27 16:19:37,926 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2024-01-27 16:19:37,935 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 55 [2024-01-27 16:19:37,935 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 112 places, 169 transitions, 1205 flow. Second operand has 7 states, 7 states have (on average 20.142857142857142) internal successors, (141), 7 states have internal predecessors, (141), 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) [2024-01-27 16:19:37,935 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 16:19:37,935 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 55 [2024-01-27 16:19:37,935 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 16:19:46,949 INFO L124 PetriNetUnfolderBase]: 56379/79160 cut-off events. [2024-01-27 16:19:46,950 INFO L125 PetriNetUnfolderBase]: For 426145/427315 co-relation queries the response was YES. [2024-01-27 16:19:47,365 INFO L83 FinitePrefix]: Finished finitePrefix Result has 308632 conditions, 79160 events. 56379/79160 cut-off events. For 426145/427315 co-relation queries the response was YES. Maximal size of possible extension queue 2714. Compared 555682 event pairs, 7277 based on Foata normal form. 1122/79985 useless extension candidates. Maximal degree in co-relation 308585. Up to 26064 conditions per place. [2024-01-27 16:19:47,610 INFO L140 encePairwiseOnDemand]: 48/55 looper letters, 358 selfloop transitions, 31 changer transitions 0/400 dead transitions. [2024-01-27 16:19:47,610 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 117 places, 400 transitions, 3704 flow [2024-01-27 16:19:47,611 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-01-27 16:19:47,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-01-27 16:19:47,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 196 transitions. [2024-01-27 16:19:47,611 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.593939393939394 [2024-01-27 16:19:47,611 INFO L175 Difference]: Start difference. First operand has 112 places, 169 transitions, 1205 flow. Second operand 6 states and 196 transitions. [2024-01-27 16:19:47,612 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 117 places, 400 transitions, 3704 flow [2024-01-27 16:19:49,514 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 116 places, 400 transitions, 3651 flow, removed 26 selfloop flow, removed 1 redundant places. [2024-01-27 16:19:49,517 INFO L231 Difference]: Finished difference. Result has 120 places, 187 transitions, 1457 flow [2024-01-27 16:19:49,518 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=55, PETRI_DIFFERENCE_MINUEND_FLOW=1160, PETRI_DIFFERENCE_MINUEND_PLACES=111, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=167, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=144, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1457, PETRI_PLACES=120, PETRI_TRANSITIONS=187} [2024-01-27 16:19:49,518 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 64 predicate places. [2024-01-27 16:19:49,518 INFO L495 AbstractCegarLoop]: Abstraction has has 120 places, 187 transitions, 1457 flow [2024-01-27 16:19:49,518 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 20.142857142857142) internal successors, (141), 7 states have internal predecessors, (141), 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) [2024-01-27 16:19:49,518 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 16:19:49,518 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 16:19:49,530 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2024-01-27 16:19:49,729 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 16:19:49,729 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2024-01-27 16:19:49,730 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 16:19:49,730 INFO L85 PathProgramCache]: Analyzing trace with hash -1320293407, now seen corresponding path program 1 times [2024-01-27 16:19:49,730 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 16:19:49,730 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1188789152] [2024-01-27 16:19:49,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 16:19:49,730 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 16:19:49,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 16:19:52,133 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 16:19:52,133 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 16:19:52,133 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1188789152] [2024-01-27 16:19:52,133 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1188789152] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 16:19:52,133 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1757307626] [2024-01-27 16:19:52,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 16:19:52,133 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 16:19:52,134 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 16:19:52,134 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-27 16:19:52,136 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-01-27 16:19:52,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 16:19:52,289 INFO L262 TraceCheckSpWp]: Trace formula consists of 407 conjuncts, 43 conjunts are in the unsatisfiable core [2024-01-27 16:19:52,297 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 16:19:52,357 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2024-01-27 16:19:52,403 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 1 [2024-01-27 16:19:52,466 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-01-27 16:19:52,466 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2024-01-27 16:19:52,517 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2024-01-27 16:19:53,008 INFO L349 Elim1Store]: treesize reduction 16, result has 64.4 percent of original size [2024-01-27 16:19:53,008 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 46 treesize of output 42 [2024-01-27 16:19:53,020 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-01-27 16:19:53,020 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 16:20:01,835 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-01-27 16:20:01,835 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 155 treesize of output 95 [2024-01-27 16:20:01,949 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-01-27 16:20:01,949 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 322 treesize of output 478 [2024-01-27 16:20:02,038 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-01-27 16:20:02,038 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 226 treesize of output 370