./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/weaver/popl20-send-receive.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 023d838f Calling Ultimate with: /root/.sdkman/candidates/java/11.0.12-open/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/weaver/popl20-send-receive.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 4eda2bf92bccdcc8638b67653fb7fdefc015ff9c815b317ad1009deb61d04585 --- Real Ultimate output --- This is Ultimate 0.2.5-tmp.fs.icfgbuilder-eval-023d838-m [2024-11-10 10:36:08,147 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-10 10:36:08,233 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-11-10 10:36:08,244 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-10 10:36:08,244 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-10 10:36:08,269 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-10 10:36:08,271 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-10 10:36:08,272 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-10 10:36:08,272 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-10 10:36:08,274 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-10 10:36:08,274 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-10 10:36:08,275 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-10 10:36:08,275 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-10 10:36:08,276 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-10 10:36:08,276 INFO L153 SettingsManager]: * Use SBE=true [2024-11-10 10:36:08,278 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-10 10:36:08,278 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-11-10 10:36:08,278 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-10 10:36:08,282 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-10 10:36:08,282 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-10 10:36:08,282 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-10 10:36:08,283 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-11-10 10:36:08,283 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-10 10:36:08,283 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-11-10 10:36:08,284 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-10 10:36:08,284 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-10 10:36:08,284 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-11-10 10:36:08,284 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-10 10:36:08,285 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2024-11-10 10:36:08,285 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-10 10:36:08,285 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-10 10:36:08,286 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-10 10:36:08,286 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-10 10:36:08,286 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-10 10:36:08,286 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-10 10:36:08,286 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-11-10 10:36:08,287 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-10 10:36:08,287 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-10 10:36:08,287 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-10 10:36:08,287 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-10 10:36:08,288 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-10 10:36:08,289 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-10 10:36:08,289 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 4eda2bf92bccdcc8638b67653fb7fdefc015ff9c815b317ad1009deb61d04585 [2024-11-10 10:36:08,525 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-10 10:36:08,555 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-10 10:36:08,558 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-10 10:36:08,559 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-10 10:36:08,559 INFO L274 PluginConnector]: CDTParser initialized [2024-11-10 10:36:08,560 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/weaver/popl20-send-receive.wvr.c [2024-11-10 10:36:09,959 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-10 10:36:10,129 INFO L384 CDTParser]: Found 1 translation units. [2024-11-10 10:36:10,130 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/popl20-send-receive.wvr.c [2024-11-10 10:36:10,139 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/60ba2987d/c5df8ce6a52a44d39b7fd043cc3b4047/FLAGb8c9b0f6c [2024-11-10 10:36:10,514 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/60ba2987d/c5df8ce6a52a44d39b7fd043cc3b4047 [2024-11-10 10:36:10,516 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-10 10:36:10,517 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-10 10:36:10,519 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-10 10:36:10,519 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-10 10:36:10,523 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-10 10:36:10,523 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.11 10:36:10" (1/1) ... [2024-11-10 10:36:10,524 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@685762cd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 10:36:10, skipping insertion in model container [2024-11-10 10:36:10,524 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.11 10:36:10" (1/1) ... [2024-11-10 10:36:10,545 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-10 10:36:10,752 WARN L250 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/popl20-send-receive.wvr.c[3146,3159] [2024-11-10 10:36:10,761 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-10 10:36:10,768 INFO L200 MainTranslator]: Completed pre-run [2024-11-10 10:36:10,787 WARN L250 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/popl20-send-receive.wvr.c[3146,3159] [2024-11-10 10:36:10,791 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-10 10:36:10,812 INFO L204 MainTranslator]: Completed translation [2024-11-10 10:36:10,816 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 10:36:10 WrapperNode [2024-11-10 10:36:10,816 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-10 10:36:10,817 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-10 10:36:10,817 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-10 10:36:10,817 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-10 10:36:10,825 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 10:36:10" (1/1) ... [2024-11-10 10:36:10,832 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 10:36:10" (1/1) ... [2024-11-10 10:36:10,853 INFO L138 Inliner]: procedures = 24, calls = 37, calls flagged for inlining = 9, calls inlined = 9, statements flattened = 145 [2024-11-10 10:36:10,853 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-10 10:36:10,854 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-10 10:36:10,854 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-10 10:36:10,854 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-10 10:36:10,863 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 10:36:10" (1/1) ... [2024-11-10 10:36:10,864 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 10:36:10" (1/1) ... [2024-11-10 10:36:10,866 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 10:36:10" (1/1) ... [2024-11-10 10:36:10,885 INFO L175 MemorySlicer]: Split 6 memory accesses to 2 slices as follows [2, 4]. 67 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0]. The 1 writes are split as follows [0, 1]. [2024-11-10 10:36:10,886 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 10:36:10" (1/1) ... [2024-11-10 10:36:10,886 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 10:36:10" (1/1) ... [2024-11-10 10:36:10,895 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 10:36:10" (1/1) ... [2024-11-10 10:36:10,896 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 10:36:10" (1/1) ... [2024-11-10 10:36:10,902 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 10:36:10" (1/1) ... [2024-11-10 10:36:10,903 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 10:36:10" (1/1) ... [2024-11-10 10:36:10,906 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-10 10:36:10,907 INFO L112 PluginConnector]: ------------------------IcfgBuilder---------------------------- [2024-11-10 10:36:10,908 INFO L270 PluginConnector]: Initializing IcfgBuilder... [2024-11-10 10:36:10,908 INFO L274 PluginConnector]: IcfgBuilder initialized [2024-11-10 10:36:10,909 INFO L184 PluginConnector]: Executing the observer IcfgBuilderObserver from plugin IcfgBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 10:36:10" (1/1) ... [2024-11-10 10:36:10,919 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-10 10:36:10,930 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-10 10:36:10,952 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-11-10 10:36:10,956 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-11-10 10:36:11,008 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-10 10:36:11,009 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2024-11-10 10:36:11,010 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2024-11-10 10:36:11,010 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2024-11-10 10:36:11,010 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2024-11-10 10:36:11,010 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2024-11-10 10:36:11,011 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2024-11-10 10:36:11,011 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-11-10 10:36:11,011 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-11-10 10:36:11,011 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-11-10 10:36:11,011 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-11-10 10:36:11,011 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-11-10 10:36:11,011 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-11-10 10:36:11,012 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-11-10 10:36:11,012 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-10 10:36:11,012 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-10 10:36:11,012 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-11-10 10:36:11,012 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-11-10 10:36:11,016 WARN L225 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2024-11-10 10:36:11,161 INFO L256 CfgBuilder]: Building ICFG [2024-11-10 10:36:11,164 INFO L286 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-10 10:36:11,463 INFO L303 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2024-11-10 10:36:11,463 INFO L307 CfgBuilder]: Performing block encoding [2024-11-10 10:36:11,662 INFO L331 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-10 10:36:11,663 INFO L336 CfgBuilder]: Removed 0 assume(true) statements. [2024-11-10 10:36:11,664 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 10.11 10:36:11 BoogieIcfgContainer [2024-11-10 10:36:11,664 INFO L131 PluginConnector]: ------------------------ END IcfgBuilder---------------------------- [2024-11-10 10:36:11,667 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-10 10:36:11,667 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-10 10:36:11,672 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-10 10:36:11,672 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 10.11 10:36:10" (1/3) ... [2024-11-10 10:36:11,673 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3ff846e4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.11 10:36:11, skipping insertion in model container [2024-11-10 10:36:11,673 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 10:36:10" (2/3) ... [2024-11-10 10:36:11,673 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3ff846e4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.11 10:36:11, skipping insertion in model container [2024-11-10 10:36:11,673 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 10.11 10:36:11" (3/3) ... [2024-11-10 10:36:11,675 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-send-receive.wvr.c [2024-11-10 10:36:11,689 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-10 10:36:11,689 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-11-10 10:36:11,689 INFO L489 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-11-10 10:36:11,805 INFO L143 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2024-11-10 10:36:11,838 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 48 places, 45 transitions, 111 flow [2024-11-10 10:36:11,875 INFO L124 PetriNetUnfolderBase]: 7/42 cut-off events. [2024-11-10 10:36:11,876 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2024-11-10 10:36:11,879 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55 conditions, 42 events. 7/42 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 73 event pairs, 0 based on Foata normal form. 0/34 useless extension candidates. Maximal degree in co-relation 36. Up to 2 conditions per place. [2024-11-10 10:36:11,880 INFO L82 GeneralOperation]: Start removeDead. Operand has 48 places, 45 transitions, 111 flow [2024-11-10 10:36:11,883 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 44 places, 41 transitions, 100 flow [2024-11-10 10:36:11,895 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-10 10:36:11,906 INFO L333 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopHeads, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@3bdc34ca, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-10 10:36:11,906 INFO L334 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2024-11-10 10:36:11,921 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-11-10 10:36:11,921 INFO L124 PetriNetUnfolderBase]: 7/40 cut-off events. [2024-11-10 10:36:11,921 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2024-11-10 10:36:11,922 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 10:36:11,922 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-10 10:36:11,923 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-11-10 10:36:11,928 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 10:36:11,928 INFO L85 PathProgramCache]: Analyzing trace with hash -114583568, now seen corresponding path program 1 times [2024-11-10 10:36:11,934 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 10:36:11,935 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [827601025] [2024-11-10 10:36:11,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 10:36:11,935 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 10:36:12,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 10:36:12,111 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 10:36:12,111 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 10:36:12,111 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [827601025] [2024-11-10 10:36:12,112 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [827601025] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-10 10:36:12,112 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-10 10:36:12,112 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-10 10:36:12,113 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [817119271] [2024-11-10 10:36:12,114 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-10 10:36:12,119 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2024-11-10 10:36:12,123 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 10:36:12,143 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2024-11-10 10:36:12,143 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-11-10 10:36:12,144 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 45 [2024-11-10 10:36:12,146 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 41 transitions, 100 flow. Second operand has 2 states, 2 states have (on average 26.5) internal successors, (53), 2 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 10:36:12,146 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-10 10:36:12,146 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 45 [2024-11-10 10:36:12,146 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-10 10:36:12,350 INFO L124 PetriNetUnfolderBase]: 485/804 cut-off events. [2024-11-10 10:36:12,350 INFO L125 PetriNetUnfolderBase]: For 54/54 co-relation queries the response was YES. [2024-11-10 10:36:12,357 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1598 conditions, 804 events. 485/804 cut-off events. For 54/54 co-relation queries the response was YES. Maximal size of possible extension queue 73. Compared 4060 event pairs, 364 based on Foata normal form. 86/802 useless extension candidates. Maximal degree in co-relation 1444. Up to 710 conditions per place. [2024-11-10 10:36:12,369 INFO L140 encePairwiseOnDemand]: 42/45 looper letters, 25 selfloop transitions, 0 changer transitions 0/38 dead transitions. [2024-11-10 10:36:12,369 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 38 transitions, 144 flow [2024-11-10 10:36:12,371 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2024-11-10 10:36:12,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2024-11-10 10:36:12,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 60 transitions. [2024-11-10 10:36:12,385 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6666666666666666 [2024-11-10 10:36:12,386 INFO L175 Difference]: Start difference. First operand has 44 places, 41 transitions, 100 flow. Second operand 2 states and 60 transitions. [2024-11-10 10:36:12,387 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 38 transitions, 144 flow [2024-11-10 10:36:12,392 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 39 places, 38 transitions, 132 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-11-10 10:36:12,394 INFO L231 Difference]: Finished difference. Result has 39 places, 38 transitions, 82 flow [2024-11-10 10:36:12,396 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=82, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=82, PETRI_PLACES=39, PETRI_TRANSITIONS=38} [2024-11-10 10:36:12,400 INFO L277 CegarLoopForPetriNet]: 44 programPoint places, -5 predicate places. [2024-11-10 10:36:12,400 INFO L471 AbstractCegarLoop]: Abstraction has has 39 places, 38 transitions, 82 flow [2024-11-10 10:36:12,401 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 26.5) internal successors, (53), 2 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 10:36:12,401 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 10:36:12,401 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-10 10:36:12,402 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-10 10:36:12,402 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-11-10 10:36:12,403 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 10:36:12,403 INFO L85 PathProgramCache]: Analyzing trace with hash -2108811575, now seen corresponding path program 1 times [2024-11-10 10:36:12,404 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 10:36:12,404 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1238982254] [2024-11-10 10:36:12,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 10:36:12,405 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 10:36:12,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 10:36:12,818 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 10:36:12,818 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 10:36:12,818 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1238982254] [2024-11-10 10:36:12,819 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1238982254] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-10 10:36:12,819 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-10 10:36:12,819 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-10 10:36:12,819 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [347707317] [2024-11-10 10:36:12,820 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-10 10:36:12,821 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-10 10:36:12,821 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 10:36:12,822 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-10 10:36:12,822 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-10 10:36:12,830 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 45 [2024-11-10 10:36:12,831 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 39 places, 38 transitions, 82 flow. Second operand has 4 states, 4 states have (on average 19.75) internal successors, (79), 4 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 10:36:12,832 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-10 10:36:12,832 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 45 [2024-11-10 10:36:12,832 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-10 10:36:13,103 INFO L124 PetriNetUnfolderBase]: 567/919 cut-off events. [2024-11-10 10:36:13,104 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-11-10 10:36:13,107 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1774 conditions, 919 events. 567/919 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 67. Compared 4235 event pairs, 74 based on Foata normal form. 50/947 useless extension candidates. Maximal degree in co-relation 1771. Up to 453 conditions per place. [2024-11-10 10:36:13,111 INFO L140 encePairwiseOnDemand]: 40/45 looper letters, 56 selfloop transitions, 5 changer transitions 0/73 dead transitions. [2024-11-10 10:36:13,111 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 43 places, 73 transitions, 276 flow [2024-11-10 10:36:13,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-10 10:36:13,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-10 10:36:13,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 138 transitions. [2024-11-10 10:36:13,115 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6133333333333333 [2024-11-10 10:36:13,115 INFO L175 Difference]: Start difference. First operand has 39 places, 38 transitions, 82 flow. Second operand 5 states and 138 transitions. [2024-11-10 10:36:13,115 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 43 places, 73 transitions, 276 flow [2024-11-10 10:36:13,116 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 43 places, 73 transitions, 276 flow, removed 0 selfloop flow, removed 0 redundant places. [2024-11-10 10:36:13,120 INFO L231 Difference]: Finished difference. Result has 46 places, 41 transitions, 113 flow [2024-11-10 10:36:13,120 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=82, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=113, PETRI_PLACES=46, PETRI_TRANSITIONS=41} [2024-11-10 10:36:13,121 INFO L277 CegarLoopForPetriNet]: 44 programPoint places, 2 predicate places. [2024-11-10 10:36:13,121 INFO L471 AbstractCegarLoop]: Abstraction has has 46 places, 41 transitions, 113 flow [2024-11-10 10:36:13,121 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 19.75) internal successors, (79), 4 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 10:36:13,122 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 10:36:13,122 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-10 10:36:13,122 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-10 10:36:13,122 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-11-10 10:36:13,123 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 10:36:13,123 INFO L85 PathProgramCache]: Analyzing trace with hash 1420455079, now seen corresponding path program 2 times [2024-11-10 10:36:13,123 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 10:36:13,124 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1801295148] [2024-11-10 10:36:13,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 10:36:13,124 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 10:36:13,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 10:36:13,328 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 10:36:13,328 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 10:36:13,328 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1801295148] [2024-11-10 10:36:13,328 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1801295148] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-10 10:36:13,328 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-10 10:36:13,329 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-10 10:36:13,329 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [984628532] [2024-11-10 10:36:13,329 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-10 10:36:13,329 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-10 10:36:13,330 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 10:36:13,331 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-10 10:36:13,331 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-10 10:36:13,332 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 45 [2024-11-10 10:36:13,332 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 41 transitions, 113 flow. Second operand has 4 states, 4 states have (on average 19.75) internal successors, (79), 4 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 10:36:13,332 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-10 10:36:13,333 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 45 [2024-11-10 10:36:13,333 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-10 10:36:13,563 INFO L124 PetriNetUnfolderBase]: 718/1235 cut-off events. [2024-11-10 10:36:13,564 INFO L125 PetriNetUnfolderBase]: For 272/272 co-relation queries the response was YES. [2024-11-10 10:36:13,567 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2617 conditions, 1235 events. 718/1235 cut-off events. For 272/272 co-relation queries the response was YES. Maximal size of possible extension queue 101. Compared 6738 event pairs, 198 based on Foata normal form. 0/1146 useless extension candidates. Maximal degree in co-relation 2610. Up to 608 conditions per place. [2024-11-10 10:36:13,573 INFO L140 encePairwiseOnDemand]: 40/45 looper letters, 51 selfloop transitions, 7 changer transitions 0/70 dead transitions. [2024-11-10 10:36:13,573 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 70 transitions, 311 flow [2024-11-10 10:36:13,574 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-10 10:36:13,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-10 10:36:13,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 131 transitions. [2024-11-10 10:36:13,575 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5822222222222222 [2024-11-10 10:36:13,575 INFO L175 Difference]: Start difference. First operand has 46 places, 41 transitions, 113 flow. Second operand 5 states and 131 transitions. [2024-11-10 10:36:13,575 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 70 transitions, 311 flow [2024-11-10 10:36:13,578 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 70 transitions, 306 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-10 10:36:13,579 INFO L231 Difference]: Finished difference. Result has 52 places, 45 transitions, 156 flow [2024-11-10 10:36:13,579 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=110, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=156, PETRI_PLACES=52, PETRI_TRANSITIONS=45} [2024-11-10 10:36:13,581 INFO L277 CegarLoopForPetriNet]: 44 programPoint places, 8 predicate places. [2024-11-10 10:36:13,581 INFO L471 AbstractCegarLoop]: Abstraction has has 52 places, 45 transitions, 156 flow [2024-11-10 10:36:13,581 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 19.75) internal successors, (79), 4 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 10:36:13,581 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 10:36:13,582 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-10 10:36:13,582 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-11-10 10:36:13,582 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-11-10 10:36:13,583 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 10:36:13,583 INFO L85 PathProgramCache]: Analyzing trace with hash -262983335, now seen corresponding path program 3 times [2024-11-10 10:36:13,583 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 10:36:13,583 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [304091052] [2024-11-10 10:36:13,583 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 10:36:13,584 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 10:36:13,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 10:36:13,842 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 10:36:13,845 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 10:36:13,845 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [304091052] [2024-11-10 10:36:13,845 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [304091052] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-10 10:36:13,846 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-10 10:36:13,846 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-10 10:36:13,846 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2044119461] [2024-11-10 10:36:13,846 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-10 10:36:13,846 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-10 10:36:13,847 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 10:36:13,847 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-10 10:36:13,847 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-10 10:36:13,855 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 45 [2024-11-10 10:36:13,855 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 45 transitions, 156 flow. Second operand has 5 states, 5 states have (on average 18.8) internal successors, (94), 5 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 10:36:13,855 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-10 10:36:13,855 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 45 [2024-11-10 10:36:13,856 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-10 10:36:14,192 INFO L124 PetriNetUnfolderBase]: 1198/2151 cut-off events. [2024-11-10 10:36:14,193 INFO L125 PetriNetUnfolderBase]: For 923/925 co-relation queries the response was YES. [2024-11-10 10:36:14,198 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4701 conditions, 2151 events. 1198/2151 cut-off events. For 923/925 co-relation queries the response was YES. Maximal size of possible extension queue 137. Compared 12765 event pairs, 228 based on Foata normal form. 72/2171 useless extension candidates. Maximal degree in co-relation 4691. Up to 770 conditions per place. [2024-11-10 10:36:14,205 INFO L140 encePairwiseOnDemand]: 40/45 looper letters, 56 selfloop transitions, 5 changer transitions 18/91 dead transitions. [2024-11-10 10:36:14,205 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 91 transitions, 458 flow [2024-11-10 10:36:14,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-10 10:36:14,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-10 10:36:14,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 143 transitions. [2024-11-10 10:36:14,209 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6355555555555555 [2024-11-10 10:36:14,209 INFO L175 Difference]: Start difference. First operand has 52 places, 45 transitions, 156 flow. Second operand 5 states and 143 transitions. [2024-11-10 10:36:14,210 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 91 transitions, 458 flow [2024-11-10 10:36:14,212 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 91 transitions, 450 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-10 10:36:14,215 INFO L231 Difference]: Finished difference. Result has 57 places, 43 transitions, 157 flow [2024-11-10 10:36:14,215 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=152, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=157, PETRI_PLACES=57, PETRI_TRANSITIONS=43} [2024-11-10 10:36:14,216 INFO L277 CegarLoopForPetriNet]: 44 programPoint places, 13 predicate places. [2024-11-10 10:36:14,216 INFO L471 AbstractCegarLoop]: Abstraction has has 57 places, 43 transitions, 157 flow [2024-11-10 10:36:14,216 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 18.8) internal successors, (94), 5 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 10:36:14,216 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 10:36:14,217 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 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] [2024-11-10 10:36:14,217 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-11-10 10:36:14,217 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-11-10 10:36:14,218 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 10:36:14,218 INFO L85 PathProgramCache]: Analyzing trace with hash -1412103427, now seen corresponding path program 1 times [2024-11-10 10:36:14,218 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 10:36:14,218 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1062266561] [2024-11-10 10:36:14,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 10:36:14,219 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 10:36:14,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 10:36:14,282 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 10:36:14,282 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 10:36:14,282 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1062266561] [2024-11-10 10:36:14,282 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1062266561] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-10 10:36:14,282 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-10 10:36:14,282 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-10 10:36:14,283 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [524420760] [2024-11-10 10:36:14,283 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-10 10:36:14,283 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-10 10:36:14,283 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 10:36:14,284 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-10 10:36:14,284 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-10 10:36:14,284 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 45 [2024-11-10 10:36:14,284 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 43 transitions, 157 flow. Second operand has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 3 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 10:36:14,284 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-10 10:36:14,285 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 45 [2024-11-10 10:36:14,285 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-10 10:36:14,421 INFO L124 PetriNetUnfolderBase]: 510/905 cut-off events. [2024-11-10 10:36:14,421 INFO L125 PetriNetUnfolderBase]: For 751/767 co-relation queries the response was YES. [2024-11-10 10:36:14,423 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2138 conditions, 905 events. 510/905 cut-off events. For 751/767 co-relation queries the response was YES. Maximal size of possible extension queue 56. Compared 4130 event pairs, 195 based on Foata normal form. 16/867 useless extension candidates. Maximal degree in co-relation 2126. Up to 680 conditions per place. [2024-11-10 10:36:14,427 INFO L140 encePairwiseOnDemand]: 41/45 looper letters, 32 selfloop transitions, 3 changer transitions 0/48 dead transitions. [2024-11-10 10:36:14,427 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 59 places, 48 transitions, 234 flow [2024-11-10 10:36:14,428 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-10 10:36:14,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-10 10:36:14,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 81 transitions. [2024-11-10 10:36:14,429 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6 [2024-11-10 10:36:14,429 INFO L175 Difference]: Start difference. First operand has 57 places, 43 transitions, 157 flow. Second operand 3 states and 81 transitions. [2024-11-10 10:36:14,429 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 59 places, 48 transitions, 234 flow [2024-11-10 10:36:14,432 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 48 transitions, 210 flow, removed 1 selfloop flow, removed 9 redundant places. [2024-11-10 10:36:14,433 INFO L231 Difference]: Finished difference. Result has 51 places, 43 transitions, 141 flow [2024-11-10 10:36:14,433 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=122, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=141, PETRI_PLACES=51, PETRI_TRANSITIONS=43} [2024-11-10 10:36:14,435 INFO L277 CegarLoopForPetriNet]: 44 programPoint places, 7 predicate places. [2024-11-10 10:36:14,436 INFO L471 AbstractCegarLoop]: Abstraction has has 51 places, 43 transitions, 141 flow [2024-11-10 10:36:14,436 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 3 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 10:36:14,436 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 10:36:14,436 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 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] [2024-11-10 10:36:14,437 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-11-10 10:36:14,437 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-11-10 10:36:14,440 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 10:36:14,440 INFO L85 PathProgramCache]: Analyzing trace with hash 1532829829, now seen corresponding path program 1 times [2024-11-10 10:36:14,440 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 10:36:14,440 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1753361213] [2024-11-10 10:36:14,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 10:36:14,440 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 10:36:14,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 10:36:14,553 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-10 10:36:14,554 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 10:36:14,554 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1753361213] [2024-11-10 10:36:14,554 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1753361213] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-10 10:36:14,554 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-10 10:36:14,555 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-10 10:36:14,555 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1381066171] [2024-11-10 10:36:14,555 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-10 10:36:14,555 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-10 10:36:14,556 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 10:36:14,556 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-10 10:36:14,556 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-10 10:36:14,557 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 45 [2024-11-10 10:36:14,557 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 43 transitions, 141 flow. Second operand has 4 states, 4 states have (on average 21.0) internal successors, (84), 4 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 10:36:14,557 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-10 10:36:14,557 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 45 [2024-11-10 10:36:14,557 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-10 10:36:14,704 INFO L124 PetriNetUnfolderBase]: 535/967 cut-off events. [2024-11-10 10:36:14,705 INFO L125 PetriNetUnfolderBase]: For 541/557 co-relation queries the response was YES. [2024-11-10 10:36:14,707 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2334 conditions, 967 events. 535/967 cut-off events. For 541/557 co-relation queries the response was YES. Maximal size of possible extension queue 56. Compared 4425 event pairs, 338 based on Foata normal form. 6/915 useless extension candidates. Maximal degree in co-relation 2324. Up to 755 conditions per place. [2024-11-10 10:36:14,712 INFO L140 encePairwiseOnDemand]: 40/45 looper letters, 30 selfloop transitions, 2 changer transitions 11/55 dead transitions. [2024-11-10 10:36:14,712 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 55 transitions, 258 flow [2024-11-10 10:36:14,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-10 10:36:14,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-10 10:36:14,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 114 transitions. [2024-11-10 10:36:14,714 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5066666666666667 [2024-11-10 10:36:14,714 INFO L175 Difference]: Start difference. First operand has 51 places, 43 transitions, 141 flow. Second operand 5 states and 114 transitions. [2024-11-10 10:36:14,714 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 55 transitions, 258 flow [2024-11-10 10:36:14,716 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 55 transitions, 255 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-10 10:36:14,716 INFO L231 Difference]: Finished difference. Result has 57 places, 44 transitions, 154 flow [2024-11-10 10:36:14,717 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=138, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=154, PETRI_PLACES=57, PETRI_TRANSITIONS=44} [2024-11-10 10:36:14,717 INFO L277 CegarLoopForPetriNet]: 44 programPoint places, 13 predicate places. [2024-11-10 10:36:14,718 INFO L471 AbstractCegarLoop]: Abstraction has has 57 places, 44 transitions, 154 flow [2024-11-10 10:36:14,718 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 21.0) internal successors, (84), 4 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 10:36:14,718 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 10:36:14,718 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 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] [2024-11-10 10:36:14,718 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-11-10 10:36:14,719 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-11-10 10:36:14,719 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 10:36:14,719 INFO L85 PathProgramCache]: Analyzing trace with hash -851876960, now seen corresponding path program 1 times [2024-11-10 10:36:14,719 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 10:36:14,720 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [8305553] [2024-11-10 10:36:14,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 10:36:14,720 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 10:36:14,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 10:36:15,875 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 10:36:15,876 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 10:36:15,876 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [8305553] [2024-11-10 10:36:15,877 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [8305553] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-10 10:36:15,877 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1285209589] [2024-11-10 10:36:15,879 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 10:36:15,879 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-10 10:36:15,879 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-10 10:36:15,881 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-10 10:36:15,882 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-10 10:36:15,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 10:36:15,990 INFO L255 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 33 conjuncts are in the unsatisfiable core [2024-11-10 10:36:16,003 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-10 10:36:16,117 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 [2024-11-10 10:36:16,640 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 10:36:16,641 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-10 10:36:17,561 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 61 treesize of output 55 [2024-11-10 10:36:17,578 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-10 10:36:17,579 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 78 treesize of output 68 [2024-11-10 10:36:17,737 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 10:36:17,737 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1285209589] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-10 10:36:17,737 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-10 10:36:17,737 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 12] total 30 [2024-11-10 10:36:17,737 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1483427314] [2024-11-10 10:36:17,738 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-10 10:36:17,738 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2024-11-10 10:36:17,739 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 10:36:17,741 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2024-11-10 10:36:17,742 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=145, Invalid=785, Unknown=0, NotChecked=0, Total=930 [2024-11-10 10:36:17,764 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 45 [2024-11-10 10:36:17,765 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 44 transitions, 154 flow. Second operand has 31 states, 31 states have (on average 12.35483870967742) internal successors, (383), 31 states have internal predecessors, (383), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 10:36:17,765 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-10 10:36:17,765 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 45 [2024-11-10 10:36:17,765 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-10 10:36:20,713 INFO L124 PetriNetUnfolderBase]: 3489/5673 cut-off events. [2024-11-10 10:36:20,714 INFO L125 PetriNetUnfolderBase]: For 3396/3396 co-relation queries the response was YES. [2024-11-10 10:36:20,723 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13962 conditions, 5673 events. 3489/5673 cut-off events. For 3396/3396 co-relation queries the response was YES. Maximal size of possible extension queue 243. Compared 33116 event pairs, 360 based on Foata normal form. 264/5709 useless extension candidates. Maximal degree in co-relation 13949. Up to 1162 conditions per place. [2024-11-10 10:36:20,741 INFO L140 encePairwiseOnDemand]: 29/45 looper letters, 154 selfloop transitions, 47 changer transitions 107/315 dead transitions. [2024-11-10 10:36:20,742 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 91 places, 315 transitions, 1597 flow [2024-11-10 10:36:20,742 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2024-11-10 10:36:20,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2024-11-10 10:36:20,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 673 transitions. [2024-11-10 10:36:20,745 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4042042042042042 [2024-11-10 10:36:20,745 INFO L175 Difference]: Start difference. First operand has 57 places, 44 transitions, 154 flow. Second operand 37 states and 673 transitions. [2024-11-10 10:36:20,745 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 91 places, 315 transitions, 1597 flow [2024-11-10 10:36:20,752 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 88 places, 315 transitions, 1561 flow, removed 17 selfloop flow, removed 3 redundant places. [2024-11-10 10:36:20,755 INFO L231 Difference]: Finished difference. Result has 119 places, 89 transitions, 577 flow [2024-11-10 10:36:20,755 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=148, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=37, PETRI_FLOW=577, PETRI_PLACES=119, PETRI_TRANSITIONS=89} [2024-11-10 10:36:20,756 INFO L277 CegarLoopForPetriNet]: 44 programPoint places, 75 predicate places. [2024-11-10 10:36:20,756 INFO L471 AbstractCegarLoop]: Abstraction has has 119 places, 89 transitions, 577 flow [2024-11-10 10:36:20,757 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 12.35483870967742) internal successors, (383), 31 states have internal predecessors, (383), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 10:36:20,757 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 10:36:20,757 INFO L204 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 2, 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] [2024-11-10 10:36:20,777 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2024-11-10 10:36:20,961 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-10 10:36:20,962 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-11-10 10:36:20,962 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 10:36:20,963 INFO L85 PathProgramCache]: Analyzing trace with hash 393419037, now seen corresponding path program 1 times [2024-11-10 10:36:20,963 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 10:36:20,963 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1278112379] [2024-11-10 10:36:20,963 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 10:36:20,963 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 10:36:20,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 10:36:21,041 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-10 10:36:21,041 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 10:36:21,042 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1278112379] [2024-11-10 10:36:21,042 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1278112379] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-10 10:36:21,042 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-10 10:36:21,042 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-10 10:36:21,042 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1179729161] [2024-11-10 10:36:21,042 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-10 10:36:21,043 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-10 10:36:21,043 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 10:36:21,046 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-10 10:36:21,046 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-10 10:36:21,055 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 45 [2024-11-10 10:36:21,055 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 119 places, 89 transitions, 577 flow. Second operand has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 3 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 10:36:21,055 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-10 10:36:21,055 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 45 [2024-11-10 10:36:21,056 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-10 10:36:21,469 INFO L124 PetriNetUnfolderBase]: 1525/2575 cut-off events. [2024-11-10 10:36:21,470 INFO L125 PetriNetUnfolderBase]: For 12044/12077 co-relation queries the response was YES. [2024-11-10 10:36:21,482 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10049 conditions, 2575 events. 1525/2575 cut-off events. For 12044/12077 co-relation queries the response was YES. Maximal size of possible extension queue 104. Compared 13194 event pairs, 573 based on Foata normal form. 22/2546 useless extension candidates. Maximal degree in co-relation 10008. Up to 2044 conditions per place. [2024-11-10 10:36:21,501 INFO L140 encePairwiseOnDemand]: 42/45 looper letters, 88 selfloop transitions, 2 changer transitions 0/104 dead transitions. [2024-11-10 10:36:21,501 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 107 places, 104 transitions, 861 flow [2024-11-10 10:36:21,502 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-10 10:36:21,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-10 10:36:21,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 83 transitions. [2024-11-10 10:36:21,503 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6148148148148148 [2024-11-10 10:36:21,503 INFO L175 Difference]: Start difference. First operand has 119 places, 89 transitions, 577 flow. Second operand 3 states and 83 transitions. [2024-11-10 10:36:21,503 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 107 places, 104 transitions, 861 flow [2024-11-10 10:36:21,535 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 89 places, 104 transitions, 734 flow, removed 45 selfloop flow, removed 18 redundant places. [2024-11-10 10:36:21,537 INFO L231 Difference]: Finished difference. Result has 90 places, 84 transitions, 458 flow [2024-11-10 10:36:21,537 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=444, PETRI_DIFFERENCE_MINUEND_PLACES=87, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=83, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=81, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=458, PETRI_PLACES=90, PETRI_TRANSITIONS=84} [2024-11-10 10:36:21,538 INFO L277 CegarLoopForPetriNet]: 44 programPoint places, 46 predicate places. [2024-11-10 10:36:21,538 INFO L471 AbstractCegarLoop]: Abstraction has has 90 places, 84 transitions, 458 flow [2024-11-10 10:36:21,538 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 3 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 10:36:21,538 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 10:36:21,539 INFO L204 CegarLoopForPetriNet]: trace histogram [4, 3, 2, 2, 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] [2024-11-10 10:36:21,539 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-11-10 10:36:21,539 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-11-10 10:36:21,539 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 10:36:21,539 INFO L85 PathProgramCache]: Analyzing trace with hash 1380560518, now seen corresponding path program 2 times [2024-11-10 10:36:21,540 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 10:36:21,540 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [727239300] [2024-11-10 10:36:21,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 10:36:21,540 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 10:36:21,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 10:36:23,010 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 10:36:23,011 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 10:36:23,011 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [727239300] [2024-11-10 10:36:23,011 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [727239300] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-10 10:36:23,011 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1247342949] [2024-11-10 10:36:23,011 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-10 10:36:23,011 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-10 10:36:23,012 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-10 10:36:23,015 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-10 10:36:23,021 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-10 10:36:23,108 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-10 10:36:23,108 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-10 10:36:23,110 INFO L255 TraceCheckSpWp]: Trace formula consists of 217 conjuncts, 22 conjuncts are in the unsatisfiable core [2024-11-10 10:36:23,113 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-10 10:36:23,324 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 12 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-10 10:36:23,324 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-10 10:36:23,434 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-10 10:36:23,435 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 40 treesize of output 24 [2024-11-10 10:36:23,587 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-11-10 10:36:23,588 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1247342949] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-10 10:36:23,588 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-10 10:36:23,588 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 8, 6] total 22 [2024-11-10 10:36:23,588 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2121193202] [2024-11-10 10:36:23,588 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-10 10:36:23,589 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2024-11-10 10:36:23,589 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 10:36:23,590 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2024-11-10 10:36:23,593 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=425, Unknown=0, NotChecked=0, Total=506 [2024-11-10 10:36:23,617 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 45 [2024-11-10 10:36:23,618 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 90 places, 84 transitions, 458 flow. Second operand has 23 states, 23 states have (on average 17.043478260869566) internal successors, (392), 23 states have internal predecessors, (392), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 10:36:23,618 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-10 10:36:23,618 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 45 [2024-11-10 10:36:23,618 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-10 10:36:24,732 INFO L124 PetriNetUnfolderBase]: 2214/4012 cut-off events. [2024-11-10 10:36:24,732 INFO L125 PetriNetUnfolderBase]: For 11054/11113 co-relation queries the response was YES. [2024-11-10 10:36:24,745 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13152 conditions, 4012 events. 2214/4012 cut-off events. For 11054/11113 co-relation queries the response was YES. Maximal size of possible extension queue 220. Compared 24926 event pairs, 189 based on Foata normal form. 93/3978 useless extension candidates. Maximal degree in co-relation 13124. Up to 827 conditions per place. [2024-11-10 10:36:24,761 INFO L140 encePairwiseOnDemand]: 34/45 looper letters, 145 selfloop transitions, 34 changer transitions 2/202 dead transitions. [2024-11-10 10:36:24,762 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 107 places, 202 transitions, 1416 flow [2024-11-10 10:36:24,762 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2024-11-10 10:36:24,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2024-11-10 10:36:24,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 370 transitions. [2024-11-10 10:36:24,764 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4567901234567901 [2024-11-10 10:36:24,764 INFO L175 Difference]: Start difference. First operand has 90 places, 84 transitions, 458 flow. Second operand 18 states and 370 transitions. [2024-11-10 10:36:24,764 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 107 places, 202 transitions, 1416 flow [2024-11-10 10:36:24,781 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 106 places, 202 transitions, 1411 flow, removed 1 selfloop flow, removed 1 redundant places. [2024-11-10 10:36:24,784 INFO L231 Difference]: Finished difference. Result has 111 places, 101 transitions, 686 flow [2024-11-10 10:36:24,784 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=454, PETRI_DIFFERENCE_MINUEND_PLACES=89, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=84, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=686, PETRI_PLACES=111, PETRI_TRANSITIONS=101} [2024-11-10 10:36:24,785 INFO L277 CegarLoopForPetriNet]: 44 programPoint places, 67 predicate places. [2024-11-10 10:36:24,785 INFO L471 AbstractCegarLoop]: Abstraction has has 111 places, 101 transitions, 686 flow [2024-11-10 10:36:24,786 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 17.043478260869566) internal successors, (392), 23 states have internal predecessors, (392), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 10:36:24,786 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 10:36:24,786 INFO L204 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 2, 2, 2, 2, 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] [2024-11-10 10:36:24,805 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2024-11-10 10:36:24,990 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2024-11-10 10:36:24,991 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-11-10 10:36:24,991 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 10:36:24,991 INFO L85 PathProgramCache]: Analyzing trace with hash 1570837703, now seen corresponding path program 3 times [2024-11-10 10:36:24,991 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 10:36:24,992 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1489219937] [2024-11-10 10:36:24,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 10:36:24,992 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 10:36:25,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 10:36:25,081 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-10 10:36:25,081 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 10:36:25,081 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1489219937] [2024-11-10 10:36:25,082 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1489219937] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-10 10:36:25,082 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-10 10:36:25,082 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-10 10:36:25,082 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1615522506] [2024-11-10 10:36:25,082 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-10 10:36:25,083 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-10 10:36:25,083 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 10:36:25,084 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-10 10:36:25,084 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-11-10 10:36:25,084 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 45 [2024-11-10 10:36:25,085 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 111 places, 101 transitions, 686 flow. Second operand has 5 states, 5 states have (on average 21.2) internal successors, (106), 5 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 10:36:25,085 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-10 10:36:25,085 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 45 [2024-11-10 10:36:25,085 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-10 10:36:26,046 INFO L124 PetriNetUnfolderBase]: 3753/7002 cut-off events. [2024-11-10 10:36:26,046 INFO L125 PetriNetUnfolderBase]: For 26099/26185 co-relation queries the response was YES. [2024-11-10 10:36:26,071 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24901 conditions, 7002 events. 3753/7002 cut-off events. For 26099/26185 co-relation queries the response was YES. Maximal size of possible extension queue 265. Compared 47348 event pairs, 1001 based on Foata normal form. 252/7021 useless extension candidates. Maximal degree in co-relation 24869. Up to 2376 conditions per place. [2024-11-10 10:36:26,103 INFO L140 encePairwiseOnDemand]: 41/45 looper letters, 111 selfloop transitions, 35 changer transitions 14/185 dead transitions. [2024-11-10 10:36:26,103 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 114 places, 185 transitions, 1597 flow [2024-11-10 10:36:26,104 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-10 10:36:26,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-10 10:36:26,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 123 transitions. [2024-11-10 10:36:26,104 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6833333333333333 [2024-11-10 10:36:26,104 INFO L175 Difference]: Start difference. First operand has 111 places, 101 transitions, 686 flow. Second operand 4 states and 123 transitions. [2024-11-10 10:36:26,105 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 114 places, 185 transitions, 1597 flow [2024-11-10 10:36:26,151 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 106 places, 185 transitions, 1503 flow, removed 22 selfloop flow, removed 8 redundant places. [2024-11-10 10:36:26,154 INFO L231 Difference]: Finished difference. Result has 108 places, 125 transitions, 988 flow [2024-11-10 10:36:26,154 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=627, PETRI_DIFFERENCE_MINUEND_PLACES=103, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=101, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=988, PETRI_PLACES=108, PETRI_TRANSITIONS=125} [2024-11-10 10:36:26,155 INFO L277 CegarLoopForPetriNet]: 44 programPoint places, 64 predicate places. [2024-11-10 10:36:26,156 INFO L471 AbstractCegarLoop]: Abstraction has has 108 places, 125 transitions, 988 flow [2024-11-10 10:36:26,156 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 21.2) internal successors, (106), 5 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 10:36:26,156 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 10:36:26,157 INFO L204 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-10 10:36:26,157 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-11-10 10:36:26,157 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-11-10 10:36:26,157 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 10:36:26,159 INFO L85 PathProgramCache]: Analyzing trace with hash 2052782293, now seen corresponding path program 4 times [2024-11-10 10:36:26,159 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 10:36:26,159 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [151269267] [2024-11-10 10:36:26,159 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 10:36:26,159 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 10:36:26,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 10:36:26,307 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-11-10 10:36:26,307 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 10:36:26,311 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [151269267] [2024-11-10 10:36:26,311 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [151269267] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-10 10:36:26,311 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-10 10:36:26,312 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-10 10:36:26,312 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [390212880] [2024-11-10 10:36:26,312 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-10 10:36:26,312 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-10 10:36:26,312 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 10:36:26,313 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-10 10:36:26,313 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-10 10:36:26,318 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 45 [2024-11-10 10:36:26,319 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 108 places, 125 transitions, 988 flow. Second operand has 4 states, 4 states have (on average 21.0) internal successors, (84), 4 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 10:36:26,319 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-10 10:36:26,319 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 45 [2024-11-10 10:36:26,319 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-10 10:36:27,670 INFO L124 PetriNetUnfolderBase]: 5185/9015 cut-off events. [2024-11-10 10:36:27,670 INFO L125 PetriNetUnfolderBase]: For 31729/31763 co-relation queries the response was YES. [2024-11-10 10:36:27,699 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33276 conditions, 9015 events. 5185/9015 cut-off events. For 31729/31763 co-relation queries the response was YES. Maximal size of possible extension queue 226. Compared 56953 event pairs, 1197 based on Foata normal form. 502/9262 useless extension candidates. Maximal degree in co-relation 33243. Up to 4128 conditions per place. [2024-11-10 10:36:27,748 INFO L140 encePairwiseOnDemand]: 41/45 looper letters, 147 selfloop transitions, 4 changer transitions 0/165 dead transitions. [2024-11-10 10:36:27,748 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 111 places, 165 transitions, 1576 flow [2024-11-10 10:36:27,749 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-10 10:36:27,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-10 10:36:27,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 102 transitions. [2024-11-10 10:36:27,750 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5666666666666667 [2024-11-10 10:36:27,750 INFO L175 Difference]: Start difference. First operand has 108 places, 125 transitions, 988 flow. Second operand 4 states and 102 transitions. [2024-11-10 10:36:27,750 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 111 places, 165 transitions, 1576 flow [2024-11-10 10:36:27,980 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 110 places, 165 transitions, 1535 flow, removed 14 selfloop flow, removed 1 redundant places. [2024-11-10 10:36:27,983 INFO L231 Difference]: Finished difference. Result has 112 places, 124 transitions, 969 flow [2024-11-10 10:36:27,983 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=932, PETRI_DIFFERENCE_MINUEND_PLACES=107, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=123, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=120, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=969, PETRI_PLACES=112, PETRI_TRANSITIONS=124} [2024-11-10 10:36:27,983 INFO L277 CegarLoopForPetriNet]: 44 programPoint places, 68 predicate places. [2024-11-10 10:36:27,985 INFO L471 AbstractCegarLoop]: Abstraction has has 112 places, 124 transitions, 969 flow [2024-11-10 10:36:27,985 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 21.0) internal successors, (84), 4 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 10:36:27,985 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 10:36:27,985 INFO L204 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 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] [2024-11-10 10:36:27,986 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-11-10 10:36:27,986 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-11-10 10:36:27,986 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 10:36:27,986 INFO L85 PathProgramCache]: Analyzing trace with hash -1834546509, now seen corresponding path program 1 times [2024-11-10 10:36:27,986 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 10:36:27,988 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [108403149] [2024-11-10 10:36:27,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 10:36:27,989 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 10:36:28,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 10:36:29,461 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 6 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 10:36:29,462 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 10:36:29,463 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [108403149] [2024-11-10 10:36:29,463 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [108403149] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-10 10:36:29,463 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [712031173] [2024-11-10 10:36:29,463 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 10:36:29,463 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-10 10:36:29,464 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-10 10:36:29,465 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-10 10:36:29,468 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-10 10:36:29,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 10:36:29,558 INFO L255 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 37 conjuncts are in the unsatisfiable core [2024-11-10 10:36:29,561 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-10 10:36:30,223 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 6 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 10:36:30,227 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-10 10:36:30,784 INFO L349 Elim1Store]: treesize reduction 10, result has 73.0 percent of original size [2024-11-10 10:36:30,785 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 75 treesize of output 50 [2024-11-10 10:36:31,407 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 6 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 10:36:31,407 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [712031173] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-10 10:36:31,408 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-10 10:36:31,408 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 36 [2024-11-10 10:36:31,408 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [17077636] [2024-11-10 10:36:31,408 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-10 10:36:31,409 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2024-11-10 10:36:31,409 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 10:36:31,410 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2024-11-10 10:36:31,410 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=1142, Unknown=0, NotChecked=0, Total=1332 [2024-11-10 10:36:31,510 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 45 [2024-11-10 10:36:31,511 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 112 places, 124 transitions, 969 flow. Second operand has 37 states, 37 states have (on average 12.64864864864865) internal successors, (468), 37 states have internal predecessors, (468), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 10:36:31,512 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-10 10:36:31,512 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 45 [2024-11-10 10:36:31,512 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-10 10:36:42,082 INFO L124 PetriNetUnfolderBase]: 27683/45363 cut-off events. [2024-11-10 10:36:42,082 INFO L125 PetriNetUnfolderBase]: For 147402/147402 co-relation queries the response was YES. [2024-11-10 10:36:42,317 INFO L83 FinitePrefix]: Finished finitePrefix Result has 168357 conditions, 45363 events. 27683/45363 cut-off events. For 147402/147402 co-relation queries the response was YES. Maximal size of possible extension queue 1256. Compared 347849 event pairs, 2192 based on Foata normal form. 928/46245 useless extension candidates. Maximal degree in co-relation 168322. Up to 6138 conditions per place. [2024-11-10 10:36:42,500 INFO L140 encePairwiseOnDemand]: 30/45 looper letters, 713 selfloop transitions, 341 changer transitions 242/1303 dead transitions. [2024-11-10 10:36:42,501 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 211 places, 1303 transitions, 11175 flow [2024-11-10 10:36:42,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 100 states. [2024-11-10 10:36:42,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 100 states. [2024-11-10 10:36:42,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 1917 transitions. [2024-11-10 10:36:42,509 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.426 [2024-11-10 10:36:42,510 INFO L175 Difference]: Start difference. First operand has 112 places, 124 transitions, 969 flow. Second operand 100 states and 1917 transitions. [2024-11-10 10:36:42,510 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 211 places, 1303 transitions, 11175 flow [2024-11-10 10:36:42,780 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 210 places, 1303 transitions, 11097 flow, removed 37 selfloop flow, removed 1 redundant places. [2024-11-10 10:36:42,793 INFO L231 Difference]: Finished difference. Result has 251 places, 429 transitions, 5020 flow [2024-11-10 10:36:42,794 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=962, PETRI_DIFFERENCE_MINUEND_PLACES=111, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=124, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=73, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=100, PETRI_FLOW=5020, PETRI_PLACES=251, PETRI_TRANSITIONS=429} [2024-11-10 10:36:42,795 INFO L277 CegarLoopForPetriNet]: 44 programPoint places, 207 predicate places. [2024-11-10 10:36:42,795 INFO L471 AbstractCegarLoop]: Abstraction has has 251 places, 429 transitions, 5020 flow [2024-11-10 10:36:42,795 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 12.64864864864865) internal successors, (468), 37 states have internal predecessors, (468), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 10:36:42,795 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 10:36:42,795 INFO L204 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 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] [2024-11-10 10:36:42,814 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-11-10 10:36:42,999 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-10 10:36:43,000 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-11-10 10:36:43,001 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 10:36:43,001 INFO L85 PathProgramCache]: Analyzing trace with hash -1094057671, now seen corresponding path program 2 times [2024-11-10 10:36:43,001 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 10:36:43,001 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2111536112] [2024-11-10 10:36:43,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 10:36:43,001 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 10:36:43,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 10:36:44,249 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 4 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 10:36:44,250 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 10:36:44,250 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2111536112] [2024-11-10 10:36:44,250 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2111536112] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-10 10:36:44,250 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [638614877] [2024-11-10 10:36:44,250 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-10 10:36:44,250 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-10 10:36:44,250 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-10 10:36:44,252 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-10 10:36:44,253 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-10 10:36:44,337 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-10 10:36:44,337 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-10 10:36:44,339 INFO L255 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 42 conjuncts are in the unsatisfiable core [2024-11-10 10:36:44,341 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-10 10:36:44,978 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 10:36:44,978 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-10 10:36:45,369 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-10 10:36:45,370 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 75 treesize of output 60 [2024-11-10 10:36:46,144 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 1 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 10:36:46,145 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [638614877] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-10 10:36:46,145 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-10 10:36:46,145 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 14] total 40 [2024-11-10 10:36:46,147 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [737396068] [2024-11-10 10:36:46,147 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-10 10:36:46,148 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2024-11-10 10:36:46,148 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 10:36:46,149 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2024-11-10 10:36:46,149 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=252, Invalid=1388, Unknown=0, NotChecked=0, Total=1640 [2024-11-10 10:36:46,193 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 45 [2024-11-10 10:36:46,194 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 251 places, 429 transitions, 5020 flow. Second operand has 41 states, 41 states have (on average 15.21951219512195) internal successors, (624), 41 states have internal predecessors, (624), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 10:36:46,196 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-10 10:36:46,197 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 45 [2024-11-10 10:36:46,197 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-10 10:36:58,492 INFO L124 PetriNetUnfolderBase]: 21131/38642 cut-off events. [2024-11-10 10:36:58,492 INFO L125 PetriNetUnfolderBase]: For 1052237/1052521 co-relation queries the response was YES. [2024-11-10 10:36:59,007 INFO L83 FinitePrefix]: Finished finitePrefix Result has 217688 conditions, 38642 events. 21131/38642 cut-off events. For 1052237/1052521 co-relation queries the response was YES. Maximal size of possible extension queue 1154. Compared 336034 event pairs, 1177 based on Foata normal form. 1332/39543 useless extension candidates. Maximal degree in co-relation 217612. Up to 4636 conditions per place. [2024-11-10 10:36:59,223 INFO L140 encePairwiseOnDemand]: 30/45 looper letters, 810 selfloop transitions, 377 changer transitions 309/1580 dead transitions. [2024-11-10 10:36:59,225 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 345 places, 1580 transitions, 20599 flow [2024-11-10 10:36:59,226 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 95 states. [2024-11-10 10:36:59,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95 states. [2024-11-10 10:36:59,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 1975 transitions. [2024-11-10 10:36:59,237 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4619883040935672 [2024-11-10 10:36:59,237 INFO L175 Difference]: Start difference. First operand has 251 places, 429 transitions, 5020 flow. Second operand 95 states and 1975 transitions. [2024-11-10 10:36:59,237 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 345 places, 1580 transitions, 20599 flow [2024-11-10 10:37:02,907 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 327 places, 1580 transitions, 17831 flow, removed 1289 selfloop flow, removed 18 redundant places. [2024-11-10 10:37:02,922 INFO L231 Difference]: Finished difference. Result has 349 places, 669 transitions, 8010 flow [2024-11-10 10:37:02,922 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=4137, PETRI_DIFFERENCE_MINUEND_PLACES=233, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=429, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=158, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=257, PETRI_DIFFERENCE_SUBTRAHEND_STATES=95, PETRI_FLOW=8010, PETRI_PLACES=349, PETRI_TRANSITIONS=669} [2024-11-10 10:37:02,923 INFO L277 CegarLoopForPetriNet]: 44 programPoint places, 305 predicate places. [2024-11-10 10:37:02,923 INFO L471 AbstractCegarLoop]: Abstraction has has 349 places, 669 transitions, 8010 flow [2024-11-10 10:37:02,924 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 15.21951219512195) internal successors, (624), 41 states have internal predecessors, (624), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 10:37:02,924 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 10:37:02,924 INFO L204 CegarLoopForPetriNet]: trace histogram [4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 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] [2024-11-10 10:37:02,936 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2024-11-10 10:37:03,124 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-10 10:37:03,125 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-11-10 10:37:03,125 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 10:37:03,125 INFO L85 PathProgramCache]: Analyzing trace with hash 290598684, now seen corresponding path program 3 times [2024-11-10 10:37:03,126 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 10:37:03,126 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [679496996] [2024-11-10 10:37:03,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 10:37:03,126 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 10:37:03,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 10:37:04,667 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 4 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 10:37:04,667 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 10:37:04,667 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [679496996] [2024-11-10 10:37:04,668 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [679496996] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-10 10:37:04,668 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1014800957] [2024-11-10 10:37:04,668 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-10 10:37:04,668 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-10 10:37:04,668 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-10 10:37:04,670 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-10 10:37:04,672 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-10 10:37:04,798 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2024-11-10 10:37:04,799 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-10 10:37:04,801 INFO L255 TraceCheckSpWp]: Trace formula consists of 238 conjuncts, 36 conjuncts are in the unsatisfiable core [2024-11-10 10:37:04,803 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-10 10:37:05,232 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-10 10:37:05,233 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-10 10:37:05,606 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-10 10:37:05,607 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 75 treesize of output 60 [2024-11-10 10:37:05,858 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-11-10 10:37:05,859 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1014800957] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-10 10:37:05,859 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-10 10:37:05,859 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13, 10] total 35 [2024-11-10 10:37:05,859 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [265266994] [2024-11-10 10:37:05,859 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-10 10:37:05,860 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2024-11-10 10:37:05,861 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 10:37:05,861 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2024-11-10 10:37:05,861 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=176, Invalid=1084, Unknown=0, NotChecked=0, Total=1260 [2024-11-10 10:37:05,885 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 45 [2024-11-10 10:37:05,886 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 349 places, 669 transitions, 8010 flow. Second operand has 36 states, 36 states have (on average 14.777777777777779) internal successors, (532), 36 states have internal predecessors, (532), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 10:37:05,886 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-10 10:37:05,886 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 45 [2024-11-10 10:37:05,886 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-10 10:37:16,607 INFO L124 PetriNetUnfolderBase]: 23757/42409 cut-off events. [2024-11-10 10:37:16,607 INFO L125 PetriNetUnfolderBase]: For 1462123/1462393 co-relation queries the response was YES. [2024-11-10 10:37:17,146 INFO L83 FinitePrefix]: Finished finitePrefix Result has 256480 conditions, 42409 events. 23757/42409 cut-off events. For 1462123/1462393 co-relation queries the response was YES. Maximal size of possible extension queue 1148. Compared 359505 event pairs, 1667 based on Foata normal form. 574/42846 useless extension candidates. Maximal degree in co-relation 256392. Up to 6587 conditions per place. [2024-11-10 10:37:17,353 INFO L140 encePairwiseOnDemand]: 30/45 looper letters, 772 selfloop transitions, 321 changer transitions 87/1242 dead transitions. [2024-11-10 10:37:17,353 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 392 places, 1242 transitions, 16843 flow [2024-11-10 10:37:17,354 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2024-11-10 10:37:17,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2024-11-10 10:37:17,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 847 transitions. [2024-11-10 10:37:17,356 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.42777777777777776 [2024-11-10 10:37:17,356 INFO L175 Difference]: Start difference. First operand has 349 places, 669 transitions, 8010 flow. Second operand 44 states and 847 transitions. [2024-11-10 10:37:17,356 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 392 places, 1242 transitions, 16843 flow [2024-11-10 10:37:21,978 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 362 places, 1242 transitions, 14776 flow, removed 796 selfloop flow, removed 30 redundant places. [2024-11-10 10:37:21,991 INFO L231 Difference]: Finished difference. Result has 371 places, 753 transitions, 8511 flow [2024-11-10 10:37:21,991 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=6554, PETRI_DIFFERENCE_MINUEND_PLACES=319, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=669, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=240, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=413, PETRI_DIFFERENCE_SUBTRAHEND_STATES=44, PETRI_FLOW=8511, PETRI_PLACES=371, PETRI_TRANSITIONS=753} [2024-11-10 10:37:21,992 INFO L277 CegarLoopForPetriNet]: 44 programPoint places, 327 predicate places. [2024-11-10 10:37:21,992 INFO L471 AbstractCegarLoop]: Abstraction has has 371 places, 753 transitions, 8511 flow [2024-11-10 10:37:21,992 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 14.777777777777779) internal successors, (532), 36 states have internal predecessors, (532), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 10:37:21,992 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 10:37:21,992 INFO L204 CegarLoopForPetriNet]: trace histogram [4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 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] [2024-11-10 10:37:22,010 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-11-10 10:37:22,193 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2024-11-10 10:37:22,193 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-11-10 10:37:22,194 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 10:37:22,194 INFO L85 PathProgramCache]: Analyzing trace with hash 1896292637, now seen corresponding path program 4 times [2024-11-10 10:37:22,194 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 10:37:22,194 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1898045796] [2024-11-10 10:37:22,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 10:37:22,194 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 10:37:22,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 10:37:22,296 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 20 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-10 10:37:22,296 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 10:37:22,296 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1898045796] [2024-11-10 10:37:22,297 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1898045796] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-10 10:37:22,297 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1885314340] [2024-11-10 10:37:22,297 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-10 10:37:22,297 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-10 10:37:22,297 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-10 10:37:22,299 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-10 10:37:22,300 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-11-10 10:37:22,391 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-10 10:37:22,391 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-10 10:37:22,393 INFO L255 TraceCheckSpWp]: Trace formula consists of 237 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-11-10 10:37:22,395 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-10 10:37:22,457 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 20 proven. 5 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-11-10 10:37:22,457 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-10 10:37:22,613 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 15 proven. 12 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-10 10:37:22,614 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1885314340] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-10 10:37:22,614 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-10 10:37:22,614 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 6] total 10 [2024-11-10 10:37:22,614 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1521838070] [2024-11-10 10:37:22,614 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-10 10:37:22,615 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-11-10 10:37:22,615 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 10:37:22,615 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-11-10 10:37:22,616 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=64, Unknown=0, NotChecked=0, Total=110 [2024-11-10 10:37:22,616 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 45 [2024-11-10 10:37:22,616 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 371 places, 753 transitions, 8511 flow. Second operand has 11 states, 11 states have (on average 22.09090909090909) internal successors, (243), 11 states have internal predecessors, (243), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 10:37:22,616 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-10 10:37:22,616 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 45 [2024-11-10 10:37:22,616 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand