./Ultimate.py --spec /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/properties/unreach-call.prp --file /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/popl20-simple-queue.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version fca748b1 Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/popl20-simple-queue.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 608e0c2870f111f9f6921442a1f1a544ee956a8de04c7629c0edf3e54cde4da3 --- Real Ultimate output --- This is Ultimate 0.2.5-wip.dd.update-z3-fca748b-m [2024-11-20 09:45:10,745 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-20 09:45:10,811 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-11-20 09:45:10,815 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-20 09:45:10,815 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-20 09:45:10,835 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-20 09:45:10,836 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-20 09:45:10,836 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-20 09:45:10,837 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-20 09:45:10,837 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-20 09:45:10,837 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-20 09:45:10,838 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-20 09:45:10,838 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-20 09:45:10,839 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-20 09:45:10,839 INFO L153 SettingsManager]: * Use SBE=true [2024-11-20 09:45:10,840 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-20 09:45:10,840 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-11-20 09:45:10,840 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-20 09:45:10,841 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-20 09:45:10,841 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-20 09:45:10,843 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-20 09:45:10,843 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-11-20 09:45:10,844 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-20 09:45:10,844 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-11-20 09:45:10,844 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-20 09:45:10,845 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-20 09:45:10,845 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-11-20 09:45:10,845 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-20 09:45:10,846 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-20 09:45:10,846 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-20 09:45:10,846 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-20 09:45:10,846 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-20 09:45:10,847 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-20 09:45:10,851 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-20 09:45:10,852 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-20 09:45:10,854 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-11-20 09:45:10,855 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-20 09:45:10,855 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-20 09:45:10,855 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-20 09:45:10,855 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-20 09:45:10,856 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-20 09:45:10,857 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-20 09:45:10,857 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 608e0c2870f111f9f6921442a1f1a544ee956a8de04c7629c0edf3e54cde4da3 [2024-11-20 09:45:11,150 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-20 09:45:11,177 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-20 09:45:11,182 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-20 09:45:11,183 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-20 09:45:11,184 INFO L274 PluginConnector]: CDTParser initialized [2024-11-20 09:45:11,185 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/popl20-simple-queue.wvr.c [2024-11-20 09:45:12,639 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-20 09:45:12,834 INFO L384 CDTParser]: Found 1 translation units. [2024-11-20 09:45:12,835 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/popl20-simple-queue.wvr.c [2024-11-20 09:45:12,843 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6410930fd/324d324f10d444fab22e81594278948c/FLAGf5827db6f [2024-11-20 09:45:13,225 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6410930fd/324d324f10d444fab22e81594278948c [2024-11-20 09:45:13,228 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-20 09:45:13,229 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-20 09:45:13,230 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-20 09:45:13,230 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-20 09:45:13,236 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-20 09:45:13,237 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 09:45:13" (1/1) ... [2024-11-20 09:45:13,238 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@50c51ed4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:45:13, skipping insertion in model container [2024-11-20 09:45:13,238 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 09:45:13" (1/1) ... [2024-11-20 09:45:13,262 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-20 09:45:13,433 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-simple-queue.wvr.c[2464,2477] [2024-11-20 09:45:13,444 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-20 09:45:13,454 INFO L200 MainTranslator]: Completed pre-run [2024-11-20 09:45:13,477 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-simple-queue.wvr.c[2464,2477] [2024-11-20 09:45:13,485 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-20 09:45:13,512 INFO L204 MainTranslator]: Completed translation [2024-11-20 09:45:13,512 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:45:13 WrapperNode [2024-11-20 09:45:13,512 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-20 09:45:13,514 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-20 09:45:13,514 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-20 09:45:13,514 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-20 09:45:13,521 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:45:13" (1/1) ... [2024-11-20 09:45:13,530 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:45:13" (1/1) ... [2024-11-20 09:45:13,551 INFO L138 Inliner]: procedures = 23, calls = 23, calls flagged for inlining = 9, calls inlined = 9, statements flattened = 125 [2024-11-20 09:45:13,552 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-20 09:45:13,553 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-20 09:45:13,553 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-20 09:45:13,554 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-20 09:45:13,564 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:45:13" (1/1) ... [2024-11-20 09:45:13,564 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:45:13" (1/1) ... [2024-11-20 09:45:13,567 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:45:13" (1/1) ... [2024-11-20 09:45:13,582 INFO L175 MemorySlicer]: Split 5 memory accesses to 2 slices as follows [2, 3]. 60 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]. [2024-11-20 09:45:13,582 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:45:13" (1/1) ... [2024-11-20 09:45:13,582 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:45:13" (1/1) ... [2024-11-20 09:45:13,588 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:45:13" (1/1) ... [2024-11-20 09:45:13,591 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:45:13" (1/1) ... [2024-11-20 09:45:13,592 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:45:13" (1/1) ... [2024-11-20 09:45:13,593 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:45:13" (1/1) ... [2024-11-20 09:45:13,596 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-20 09:45:13,600 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-20 09:45:13,601 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-20 09:45:13,601 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-20 09:45:13,602 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:45:13" (1/1) ... [2024-11-20 09:45:13,609 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-20 09:45:13,620 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-20 09:45:13,642 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) [2024-11-20 09:45:13,647 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 [2024-11-20 09:45:13,699 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-20 09:45:13,699 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2024-11-20 09:45:13,700 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2024-11-20 09:45:13,700 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2024-11-20 09:45:13,700 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2024-11-20 09:45:13,700 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-11-20 09:45:13,700 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-11-20 09:45:13,700 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-11-20 09:45:13,702 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-11-20 09:45:13,702 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-11-20 09:45:13,703 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-11-20 09:45:13,703 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-11-20 09:45:13,703 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-20 09:45:13,703 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-20 09:45:13,704 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-11-20 09:45:13,704 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-11-20 09:45:13,705 WARN L207 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2024-11-20 09:45:13,830 INFO L238 CfgBuilder]: Building ICFG [2024-11-20 09:45:13,832 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-20 09:45:14,081 INFO L283 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2024-11-20 09:45:14,081 INFO L287 CfgBuilder]: Performing block encoding [2024-11-20 09:45:14,259 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-20 09:45:14,259 INFO L316 CfgBuilder]: Removed 3 assume(true) statements. [2024-11-20 09:45:14,259 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 09:45:14 BoogieIcfgContainer [2024-11-20 09:45:14,259 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-20 09:45:14,261 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-20 09:45:14,261 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-20 09:45:14,266 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-20 09:45:14,266 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.11 09:45:13" (1/3) ... [2024-11-20 09:45:14,267 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@17f0fad6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 09:45:14, skipping insertion in model container [2024-11-20 09:45:14,267 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:45:13" (2/3) ... [2024-11-20 09:45:14,268 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@17f0fad6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 09:45:14, skipping insertion in model container [2024-11-20 09:45:14,268 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 09:45:14" (3/3) ... [2024-11-20 09:45:14,270 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-simple-queue.wvr.c [2024-11-20 09:45:14,283 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-20 09:45:14,283 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-11-20 09:45:14,283 INFO L489 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-11-20 09:45:14,328 INFO L143 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2024-11-20 09:45:14,359 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 30 places, 28 transitions, 70 flow [2024-11-20 09:45:14,388 INFO L124 PetriNetUnfolderBase]: 5/26 cut-off events. [2024-11-20 09:45:14,388 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-11-20 09:45:14,392 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35 conditions, 26 events. 5/26 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 28 event pairs, 0 based on Foata normal form. 0/20 useless extension candidates. Maximal degree in co-relation 19. Up to 2 conditions per place. [2024-11-20 09:45:14,393 INFO L82 GeneralOperation]: Start removeDead. Operand has 30 places, 28 transitions, 70 flow [2024-11-20 09:45:14,397 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 27 places, 25 transitions, 62 flow [2024-11-20 09:45:14,409 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-20 09:45:14,417 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;@2522beef, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-20 09:45:14,417 INFO L334 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2024-11-20 09:45:14,426 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-11-20 09:45:14,427 INFO L124 PetriNetUnfolderBase]: 5/24 cut-off events. [2024-11-20 09:45:14,427 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-11-20 09:45:14,427 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 09:45:14,428 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-20 09:45:14,428 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-20 09:45:14,433 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 09:45:14,434 INFO L85 PathProgramCache]: Analyzing trace with hash 1302421153, now seen corresponding path program 1 times [2024-11-20 09:45:14,443 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 09:45:14,443 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [784824237] [2024-11-20 09:45:14,443 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 09:45:14,444 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 09:45:14,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 09:45:14,637 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 09:45:14,637 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 09:45:14,638 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [784824237] [2024-11-20 09:45:14,638 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [784824237] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-20 09:45:14,638 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-20 09:45:14,639 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-20 09:45:14,640 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1077147717] [2024-11-20 09:45:14,641 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-20 09:45:14,649 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2024-11-20 09:45:14,653 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 09:45:14,680 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2024-11-20 09:45:14,683 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-11-20 09:45:14,684 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 28 [2024-11-20 09:45:14,686 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 27 places, 25 transitions, 62 flow. Second operand has 2 states, 2 states have (on average 11.5) internal successors, (23), 2 states have internal predecessors, (23), 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) [2024-11-20 09:45:14,687 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 09:45:14,687 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 28 [2024-11-20 09:45:14,688 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 09:45:14,803 INFO L124 PetriNetUnfolderBase]: 122/217 cut-off events. [2024-11-20 09:45:14,803 INFO L125 PetriNetUnfolderBase]: For 19/19 co-relation queries the response was YES. [2024-11-20 09:45:14,807 INFO L83 FinitePrefix]: Finished finitePrefix Result has 455 conditions, 217 events. 122/217 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 711 event pairs, 94 based on Foata normal form. 0/186 useless extension candidates. Maximal degree in co-relation 405. Up to 214 conditions per place. [2024-11-20 09:45:14,810 INFO L140 encePairwiseOnDemand]: 26/28 looper letters, 20 selfloop transitions, 0 changer transitions 0/23 dead transitions. [2024-11-20 09:45:14,812 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 28 places, 23 transitions, 98 flow [2024-11-20 09:45:14,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2024-11-20 09:45:14,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2024-11-20 09:45:14,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 32 transitions. [2024-11-20 09:45:14,824 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5714285714285714 [2024-11-20 09:45:14,826 INFO L175 Difference]: Start difference. First operand has 27 places, 25 transitions, 62 flow. Second operand 2 states and 32 transitions. [2024-11-20 09:45:14,827 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 28 places, 23 transitions, 98 flow [2024-11-20 09:45:14,830 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 24 places, 23 transitions, 90 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-11-20 09:45:14,831 INFO L231 Difference]: Finished difference. Result has 24 places, 23 transitions, 50 flow [2024-11-20 09:45:14,834 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=50, PETRI_DIFFERENCE_MINUEND_PLACES=23, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=23, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=50, PETRI_PLACES=24, PETRI_TRANSITIONS=23} [2024-11-20 09:45:14,839 INFO L277 CegarLoopForPetriNet]: 27 programPoint places, -3 predicate places. [2024-11-20 09:45:14,839 INFO L471 AbstractCegarLoop]: Abstraction has has 24 places, 23 transitions, 50 flow [2024-11-20 09:45:14,840 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 11.5) internal successors, (23), 2 states have internal predecessors, (23), 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) [2024-11-20 09:45:14,840 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 09:45:14,840 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-20 09:45:14,841 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-20 09:45:14,841 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-20 09:45:14,842 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 09:45:14,843 INFO L85 PathProgramCache]: Analyzing trace with hash -406957548, now seen corresponding path program 1 times [2024-11-20 09:45:14,843 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 09:45:14,843 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [877159154] [2024-11-20 09:45:14,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 09:45:14,844 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 09:45:14,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 09:45:15,005 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 09:45:15,006 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 09:45:15,007 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [877159154] [2024-11-20 09:45:15,007 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [877159154] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-20 09:45:15,007 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-20 09:45:15,007 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-20 09:45:15,008 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [298816750] [2024-11-20 09:45:15,008 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-20 09:45:15,010 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-20 09:45:15,010 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 09:45:15,011 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-20 09:45:15,012 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-20 09:45:15,012 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 28 [2024-11-20 09:45:15,013 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 24 places, 23 transitions, 50 flow. Second operand has 3 states, 3 states have (on average 10.0) internal successors, (30), 3 states have internal predecessors, (30), 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) [2024-11-20 09:45:15,013 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 09:45:15,013 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 28 [2024-11-20 09:45:15,013 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 09:45:15,124 INFO L124 PetriNetUnfolderBase]: 203/353 cut-off events. [2024-11-20 09:45:15,125 INFO L125 PetriNetUnfolderBase]: For 8/8 co-relation queries the response was YES. [2024-11-20 09:45:15,126 INFO L83 FinitePrefix]: Finished finitePrefix Result has 712 conditions, 353 events. 203/353 cut-off events. For 8/8 co-relation queries the response was YES. Maximal size of possible extension queue 25. Compared 1259 event pairs, 82 based on Foata normal form. 1/301 useless extension candidates. Maximal degree in co-relation 709. Up to 176 conditions per place. [2024-11-20 09:45:15,130 INFO L140 encePairwiseOnDemand]: 25/28 looper letters, 28 selfloop transitions, 2 changer transitions 3/36 dead transitions. [2024-11-20 09:45:15,130 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 26 places, 36 transitions, 144 flow [2024-11-20 09:45:15,130 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-20 09:45:15,131 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-20 09:45:15,132 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 49 transitions. [2024-11-20 09:45:15,132 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5833333333333334 [2024-11-20 09:45:15,133 INFO L175 Difference]: Start difference. First operand has 24 places, 23 transitions, 50 flow. Second operand 3 states and 49 transitions. [2024-11-20 09:45:15,133 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 26 places, 36 transitions, 144 flow [2024-11-20 09:45:15,134 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 26 places, 36 transitions, 144 flow, removed 0 selfloop flow, removed 0 redundant places. [2024-11-20 09:45:15,135 INFO L231 Difference]: Finished difference. Result has 27 places, 24 transitions, 62 flow [2024-11-20 09:45:15,137 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=50, PETRI_DIFFERENCE_MINUEND_PLACES=24, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=23, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=62, PETRI_PLACES=27, PETRI_TRANSITIONS=24} [2024-11-20 09:45:15,138 INFO L277 CegarLoopForPetriNet]: 27 programPoint places, 0 predicate places. [2024-11-20 09:45:15,138 INFO L471 AbstractCegarLoop]: Abstraction has has 27 places, 24 transitions, 62 flow [2024-11-20 09:45:15,139 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 10.0) internal successors, (30), 3 states have internal predecessors, (30), 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) [2024-11-20 09:45:15,139 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 09:45:15,139 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] [2024-11-20 09:45:15,140 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-20 09:45:15,140 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-20 09:45:15,140 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 09:45:15,141 INFO L85 PathProgramCache]: Analyzing trace with hash -132930614, now seen corresponding path program 1 times [2024-11-20 09:45:15,154 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 09:45:15,154 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1888326910] [2024-11-20 09:45:15,155 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 09:45:15,155 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 09:45:15,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 09:45:15,285 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 09:45:15,285 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 09:45:15,285 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1888326910] [2024-11-20 09:45:15,286 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1888326910] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-20 09:45:15,286 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-20 09:45:15,287 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-20 09:45:15,287 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [354395181] [2024-11-20 09:45:15,288 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-20 09:45:15,288 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-20 09:45:15,289 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 09:45:15,289 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-20 09:45:15,290 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-20 09:45:15,290 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 28 [2024-11-20 09:45:15,291 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 27 places, 24 transitions, 62 flow. Second operand has 3 states, 3 states have (on average 11.0) internal successors, (33), 3 states have internal predecessors, (33), 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) [2024-11-20 09:45:15,291 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 09:45:15,291 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 28 [2024-11-20 09:45:15,292 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 09:45:15,410 INFO L124 PetriNetUnfolderBase]: 251/446 cut-off events. [2024-11-20 09:45:15,411 INFO L125 PetriNetUnfolderBase]: For 21/21 co-relation queries the response was YES. [2024-11-20 09:45:15,413 INFO L83 FinitePrefix]: Finished finitePrefix Result has 939 conditions, 446 events. 251/446 cut-off events. For 21/21 co-relation queries the response was YES. Maximal size of possible extension queue 25. Compared 1673 event pairs, 113 based on Foata normal form. 11/385 useless extension candidates. Maximal degree in co-relation 934. Up to 306 conditions per place. [2024-11-20 09:45:15,416 INFO L140 encePairwiseOnDemand]: 25/28 looper letters, 27 selfloop transitions, 2 changer transitions 6/38 dead transitions. [2024-11-20 09:45:15,416 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 29 places, 38 transitions, 163 flow [2024-11-20 09:45:15,417 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-20 09:45:15,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-20 09:45:15,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 50 transitions. [2024-11-20 09:45:15,419 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5952380952380952 [2024-11-20 09:45:15,420 INFO L175 Difference]: Start difference. First operand has 27 places, 24 transitions, 62 flow. Second operand 3 states and 50 transitions. [2024-11-20 09:45:15,420 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 29 places, 38 transitions, 163 flow [2024-11-20 09:45:15,421 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 28 places, 38 transitions, 161 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-20 09:45:15,422 INFO L231 Difference]: Finished difference. Result has 29 places, 25 transitions, 72 flow [2024-11-20 09:45:15,423 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=60, PETRI_DIFFERENCE_MINUEND_PLACES=26, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=24, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=72, PETRI_PLACES=29, PETRI_TRANSITIONS=25} [2024-11-20 09:45:15,424 INFO L277 CegarLoopForPetriNet]: 27 programPoint places, 2 predicate places. [2024-11-20 09:45:15,425 INFO L471 AbstractCegarLoop]: Abstraction has has 29 places, 25 transitions, 72 flow [2024-11-20 09:45:15,425 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 11.0) internal successors, (33), 3 states have internal predecessors, (33), 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) [2024-11-20 09:45:15,425 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 09:45:15,425 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] [2024-11-20 09:45:15,426 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-11-20 09:45:15,426 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-20 09:45:15,426 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 09:45:15,427 INFO L85 PathProgramCache]: Analyzing trace with hash -1274929099, now seen corresponding path program 1 times [2024-11-20 09:45:15,427 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 09:45:15,428 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1201097093] [2024-11-20 09:45:15,428 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 09:45:15,428 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 09:45:15,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 09:45:15,626 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 09:45:15,626 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 09:45:15,626 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1201097093] [2024-11-20 09:45:15,627 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1201097093] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-20 09:45:15,627 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-20 09:45:15,627 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-20 09:45:15,627 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1817732441] [2024-11-20 09:45:15,627 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-20 09:45:15,628 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-20 09:45:15,628 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 09:45:15,628 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-20 09:45:15,628 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-20 09:45:15,629 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 28 [2024-11-20 09:45:15,629 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 29 places, 25 transitions, 72 flow. Second operand has 4 states, 4 states have (on average 10.25) internal successors, (41), 4 states have internal predecessors, (41), 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) [2024-11-20 09:45:15,630 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 09:45:15,630 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 28 [2024-11-20 09:45:15,630 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 09:45:15,748 INFO L124 PetriNetUnfolderBase]: 319/585 cut-off events. [2024-11-20 09:45:15,750 INFO L125 PetriNetUnfolderBase]: For 57/57 co-relation queries the response was YES. [2024-11-20 09:45:15,752 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1268 conditions, 585 events. 319/585 cut-off events. For 57/57 co-relation queries the response was YES. Maximal size of possible extension queue 36. Compared 2454 event pairs, 285 based on Foata normal form. 12/501 useless extension candidates. Maximal degree in co-relation 1262. Up to 443 conditions per place. [2024-11-20 09:45:15,756 INFO L140 encePairwiseOnDemand]: 24/28 looper letters, 21 selfloop transitions, 2 changer transitions 15/41 dead transitions. [2024-11-20 09:45:15,756 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 32 places, 41 transitions, 184 flow [2024-11-20 09:45:15,757 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-20 09:45:15,757 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-20 09:45:15,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 57 transitions. [2024-11-20 09:45:15,758 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5089285714285714 [2024-11-20 09:45:15,758 INFO L175 Difference]: Start difference. First operand has 29 places, 25 transitions, 72 flow. Second operand 4 states and 57 transitions. [2024-11-20 09:45:15,758 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 32 places, 41 transitions, 184 flow [2024-11-20 09:45:15,759 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 31 places, 41 transitions, 182 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-20 09:45:15,760 INFO L231 Difference]: Finished difference. Result has 33 places, 26 transitions, 84 flow [2024-11-20 09:45:15,762 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=70, PETRI_DIFFERENCE_MINUEND_PLACES=28, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=25, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=84, PETRI_PLACES=33, PETRI_TRANSITIONS=26} [2024-11-20 09:45:15,764 INFO L277 CegarLoopForPetriNet]: 27 programPoint places, 6 predicate places. [2024-11-20 09:45:15,764 INFO L471 AbstractCegarLoop]: Abstraction has has 33 places, 26 transitions, 84 flow [2024-11-20 09:45:15,764 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 10.25) internal successors, (41), 4 states have internal predecessors, (41), 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) [2024-11-20 09:45:15,764 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 09:45:15,764 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] [2024-11-20 09:45:15,765 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-11-20 09:45:15,765 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-20 09:45:15,766 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 09:45:15,767 INFO L85 PathProgramCache]: Analyzing trace with hash 2016933381, now seen corresponding path program 1 times [2024-11-20 09:45:15,767 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 09:45:15,767 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [758093374] [2024-11-20 09:45:15,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 09:45:15,768 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 09:45:15,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 09:45:16,241 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 09:45:16,242 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 09:45:16,243 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [758093374] [2024-11-20 09:45:16,243 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [758093374] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-20 09:45:16,244 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1890011088] [2024-11-20 09:45:16,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 09:45:16,244 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 09:45:16,244 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-20 09:45:16,247 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) [2024-11-20 09:45:16,249 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-20 09:45:16,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 09:45:16,337 INFO L255 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 23 conjuncts are in the unsatisfiable core [2024-11-20 09:45:16,343 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-20 09:45:16,440 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 [2024-11-20 09:45:16,650 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 09:45:16,651 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-20 09:45:17,091 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 38 treesize of output 34 [2024-11-20 09:45:17,112 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2024-11-20 09:45:17,112 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 46 treesize of output 37 [2024-11-20 09:45:17,189 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 09:45:17,189 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1890011088] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-20 09:45:17,189 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-20 09:45:17,189 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 14 [2024-11-20 09:45:17,190 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [360819771] [2024-11-20 09:45:17,190 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-20 09:45:17,190 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-11-20 09:45:17,191 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 09:45:17,192 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-11-20 09:45:17,193 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=158, Unknown=0, NotChecked=0, Total=210 [2024-11-20 09:45:17,195 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 28 [2024-11-20 09:45:17,195 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 33 places, 26 transitions, 84 flow. Second operand has 15 states, 15 states have (on average 8.733333333333333) internal successors, (131), 15 states have internal predecessors, (131), 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) [2024-11-20 09:45:17,196 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 09:45:17,196 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 28 [2024-11-20 09:45:17,196 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 09:45:18,063 INFO L124 PetriNetUnfolderBase]: 1151/2030 cut-off events. [2024-11-20 09:45:18,063 INFO L125 PetriNetUnfolderBase]: For 293/293 co-relation queries the response was YES. [2024-11-20 09:45:18,071 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4453 conditions, 2030 events. 1151/2030 cut-off events. For 293/293 co-relation queries the response was YES. Maximal size of possible extension queue 76. Compared 10473 event pairs, 423 based on Foata normal form. 5/1719 useless extension candidates. Maximal degree in co-relation 4445. Up to 452 conditions per place. [2024-11-20 09:45:18,078 INFO L140 encePairwiseOnDemand]: 22/28 looper letters, 109 selfloop transitions, 21 changer transitions 30/163 dead transitions. [2024-11-20 09:45:18,079 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 163 transitions, 764 flow [2024-11-20 09:45:18,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-11-20 09:45:18,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2024-11-20 09:45:18,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 231 transitions. [2024-11-20 09:45:18,081 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5892857142857143 [2024-11-20 09:45:18,081 INFO L175 Difference]: Start difference. First operand has 33 places, 26 transitions, 84 flow. Second operand 14 states and 231 transitions. [2024-11-20 09:45:18,081 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 163 transitions, 764 flow [2024-11-20 09:45:18,088 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 43 places, 163 transitions, 752 flow, removed 5 selfloop flow, removed 2 redundant places. [2024-11-20 09:45:18,091 INFO L231 Difference]: Finished difference. Result has 51 places, 45 transitions, 258 flow [2024-11-20 09:45:18,091 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=78, PETRI_DIFFERENCE_MINUEND_PLACES=30, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=26, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=18, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=258, PETRI_PLACES=51, PETRI_TRANSITIONS=45} [2024-11-20 09:45:18,092 INFO L277 CegarLoopForPetriNet]: 27 programPoint places, 24 predicate places. [2024-11-20 09:45:18,093 INFO L471 AbstractCegarLoop]: Abstraction has has 51 places, 45 transitions, 258 flow [2024-11-20 09:45:18,093 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 8.733333333333333) internal successors, (131), 15 states have internal predecessors, (131), 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) [2024-11-20 09:45:18,094 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 09:45:18,094 INFO L204 CegarLoopForPetriNet]: trace histogram [4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-20 09:45:18,106 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-11-20 09:45:18,294 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 09:45:18,295 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-20 09:45:18,295 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 09:45:18,296 INFO L85 PathProgramCache]: Analyzing trace with hash 1030127305, now seen corresponding path program 2 times [2024-11-20 09:45:18,296 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 09:45:18,296 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1187607453] [2024-11-20 09:45:18,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 09:45:18,296 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 09:45:18,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 09:45:19,299 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 09:45:19,300 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 09:45:19,300 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1187607453] [2024-11-20 09:45:19,302 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1187607453] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-20 09:45:19,303 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1969643428] [2024-11-20 09:45:19,303 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-20 09:45:19,303 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 09:45:19,303 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-20 09:45:19,306 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) [2024-11-20 09:45:19,308 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-20 09:45:19,381 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-20 09:45:19,381 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-20 09:45:19,387 INFO L255 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 16 conjuncts are in the unsatisfiable core [2024-11-20 09:45:19,393 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-20 09:45:19,521 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-20 09:45:19,521 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-20 09:45:19,547 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2024-11-20 09:45:19,548 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 11 [2024-11-20 09:45:19,571 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-11-20 09:45:19,572 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1969643428] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-20 09:45:19,572 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-20 09:45:19,572 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 4] total 14 [2024-11-20 09:45:19,573 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [660431831] [2024-11-20 09:45:19,573 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-20 09:45:19,573 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-11-20 09:45:19,574 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 09:45:19,574 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-11-20 09:45:19,575 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2024-11-20 09:45:19,575 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 28 [2024-11-20 09:45:19,575 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 45 transitions, 258 flow. Second operand has 15 states, 15 states have (on average 8.066666666666666) internal successors, (121), 15 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 09:45:19,576 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 09:45:19,576 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 28 [2024-11-20 09:45:19,576 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 09:45:20,115 INFO L124 PetriNetUnfolderBase]: 1311/2302 cut-off events. [2024-11-20 09:45:20,116 INFO L125 PetriNetUnfolderBase]: For 1626/1626 co-relation queries the response was YES. [2024-11-20 09:45:20,121 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5651 conditions, 2302 events. 1311/2302 cut-off events. For 1626/1626 co-relation queries the response was YES. Maximal size of possible extension queue 78. Compared 11988 event pairs, 360 based on Foata normal form. 1/1937 useless extension candidates. Maximal degree in co-relation 5636. Up to 727 conditions per place. [2024-11-20 09:45:20,128 INFO L140 encePairwiseOnDemand]: 22/28 looper letters, 51 selfloop transitions, 19 changer transitions 12/85 dead transitions. [2024-11-20 09:45:20,129 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 59 places, 85 transitions, 540 flow [2024-11-20 09:45:20,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-20 09:45:20,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-11-20 09:45:20,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 111 transitions. [2024-11-20 09:45:20,131 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.44047619047619047 [2024-11-20 09:45:20,131 INFO L175 Difference]: Start difference. First operand has 51 places, 45 transitions, 258 flow. Second operand 9 states and 111 transitions. [2024-11-20 09:45:20,131 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 59 places, 85 transitions, 540 flow [2024-11-20 09:45:20,144 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 85 transitions, 518 flow, removed 10 selfloop flow, removed 1 redundant places. [2024-11-20 09:45:20,146 INFO L231 Difference]: Finished difference. Result has 59 places, 48 transitions, 308 flow [2024-11-20 09:45:20,148 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=236, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=308, PETRI_PLACES=59, PETRI_TRANSITIONS=48} [2024-11-20 09:45:20,149 INFO L277 CegarLoopForPetriNet]: 27 programPoint places, 32 predicate places. [2024-11-20 09:45:20,149 INFO L471 AbstractCegarLoop]: Abstraction has has 59 places, 48 transitions, 308 flow [2024-11-20 09:45:20,150 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 8.066666666666666) internal successors, (121), 15 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 09:45:20,150 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 09:45:20,150 INFO L204 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-20 09:45:20,159 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-11-20 09:45:20,351 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2024-11-20 09:45:20,351 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-20 09:45:20,352 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 09:45:20,352 INFO L85 PathProgramCache]: Analyzing trace with hash 997787277, now seen corresponding path program 3 times [2024-11-20 09:45:20,352 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 09:45:20,352 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [140391796] [2024-11-20 09:45:20,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 09:45:20,353 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 09:45:20,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 09:45:20,420 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-20 09:45:20,421 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 09:45:20,421 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [140391796] [2024-11-20 09:45:20,421 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [140391796] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-20 09:45:20,421 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1298983585] [2024-11-20 09:45:20,421 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-20 09:45:20,421 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 09:45:20,422 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-20 09:45:20,426 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) [2024-11-20 09:45:20,427 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-20 09:45:20,498 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-11-20 09:45:20,499 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-20 09:45:20,500 INFO L255 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 4 conjuncts are in the unsatisfiable core [2024-11-20 09:45:20,502 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-20 09:45:20,539 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-20 09:45:20,539 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-20 09:45:20,653 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-20 09:45:20,653 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1298983585] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-20 09:45:20,653 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-20 09:45:20,653 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 4] total 6 [2024-11-20 09:45:20,653 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1763769725] [2024-11-20 09:45:20,653 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-20 09:45:20,654 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-20 09:45:20,654 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 09:45:20,654 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-20 09:45:20,655 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-11-20 09:45:20,655 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 28 [2024-11-20 09:45:20,655 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 48 transitions, 308 flow. Second operand has 7 states, 7 states have (on average 11.142857142857142) internal successors, (78), 7 states have internal predecessors, (78), 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) [2024-11-20 09:45:20,655 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 09:45:20,655 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 28 [2024-11-20 09:45:20,655 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 09:45:21,030 INFO L124 PetriNetUnfolderBase]: 2326/4079 cut-off events. [2024-11-20 09:45:21,031 INFO L125 PetriNetUnfolderBase]: For 4178/4178 co-relation queries the response was YES. [2024-11-20 09:45:21,108 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10284 conditions, 4079 events. 2326/4079 cut-off events. For 4178/4178 co-relation queries the response was YES. Maximal size of possible extension queue 133. Compared 23766 event pairs, 936 based on Foata normal form. 55/3489 useless extension candidates. Maximal degree in co-relation 10267. Up to 1781 conditions per place. [2024-11-20 09:45:21,119 INFO L140 encePairwiseOnDemand]: 25/28 looper letters, 68 selfloop transitions, 16 changer transitions 0/87 dead transitions. [2024-11-20 09:45:21,120 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 87 transitions, 674 flow [2024-11-20 09:45:21,120 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-20 09:45:21,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-20 09:45:21,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 72 transitions. [2024-11-20 09:45:21,121 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6428571428571429 [2024-11-20 09:45:21,121 INFO L175 Difference]: Start difference. First operand has 59 places, 48 transitions, 308 flow. Second operand 4 states and 72 transitions. [2024-11-20 09:45:21,121 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 87 transitions, 674 flow [2024-11-20 09:45:21,129 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 87 transitions, 616 flow, removed 13 selfloop flow, removed 7 redundant places. [2024-11-20 09:45:21,131 INFO L231 Difference]: Finished difference. Result has 57 places, 59 transitions, 454 flow [2024-11-20 09:45:21,131 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=266, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=454, PETRI_PLACES=57, PETRI_TRANSITIONS=59} [2024-11-20 09:45:21,132 INFO L277 CegarLoopForPetriNet]: 27 programPoint places, 30 predicate places. [2024-11-20 09:45:21,132 INFO L471 AbstractCegarLoop]: Abstraction has has 57 places, 59 transitions, 454 flow [2024-11-20 09:45:21,132 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.142857142857142) internal successors, (78), 7 states have internal predecessors, (78), 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) [2024-11-20 09:45:21,133 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 09:45:21,133 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] [2024-11-20 09:45:21,144 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2024-11-20 09:45:21,333 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 09:45:21,335 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-20 09:45:21,335 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 09:45:21,335 INFO L85 PathProgramCache]: Analyzing trace with hash 178691706, now seen corresponding path program 4 times [2024-11-20 09:45:21,335 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 09:45:21,336 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2083974934] [2024-11-20 09:45:21,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 09:45:21,336 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 09:45:21,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 09:45:21,831 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 09:45:21,832 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 09:45:21,832 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2083974934] [2024-11-20 09:45:21,832 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2083974934] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-20 09:45:21,833 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [374097361] [2024-11-20 09:45:21,833 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-20 09:45:21,833 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 09:45:21,834 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-20 09:45:21,836 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) [2024-11-20 09:45:21,837 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-20 09:45:21,917 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-20 09:45:21,918 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-20 09:45:21,920 INFO L255 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 27 conjuncts are in the unsatisfiable core [2024-11-20 09:45:21,923 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-20 09:45:21,995 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 [2024-11-20 09:45:22,263 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2024-11-20 09:45:22,264 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 23 treesize of output 10 [2024-11-20 09:45:22,279 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 09:45:22,279 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-20 09:45:22,825 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 39 treesize of output 35 [2024-11-20 09:45:22,837 INFO L349 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2024-11-20 09:45:22,838 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 51 treesize of output 43 [2024-11-20 09:45:22,984 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 09:45:22,985 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [374097361] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-20 09:45:22,985 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-20 09:45:22,985 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 23 [2024-11-20 09:45:22,985 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2056635319] [2024-11-20 09:45:22,986 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-20 09:45:22,986 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2024-11-20 09:45:22,987 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 09:45:22,987 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2024-11-20 09:45:22,987 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=465, Unknown=0, NotChecked=0, Total=552 [2024-11-20 09:45:22,987 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 28 [2024-11-20 09:45:22,988 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 59 transitions, 454 flow. Second operand has 24 states, 24 states have (on average 7.875) internal successors, (189), 24 states have internal predecessors, (189), 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) [2024-11-20 09:45:22,988 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 09:45:22,988 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 28 [2024-11-20 09:45:22,988 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 09:45:24,479 INFO L124 PetriNetUnfolderBase]: 2450/4393 cut-off events. [2024-11-20 09:45:24,479 INFO L125 PetriNetUnfolderBase]: For 6974/6974 co-relation queries the response was YES. [2024-11-20 09:45:24,488 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11334 conditions, 4393 events. 2450/4393 cut-off events. For 6974/6974 co-relation queries the response was YES. Maximal size of possible extension queue 152. Compared 26826 event pairs, 476 based on Foata normal form. 115/3804 useless extension candidates. Maximal degree in co-relation 11317. Up to 800 conditions per place. [2024-11-20 09:45:24,499 INFO L140 encePairwiseOnDemand]: 22/28 looper letters, 95 selfloop transitions, 25 changer transitions 61/184 dead transitions. [2024-11-20 09:45:24,499 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 184 transitions, 1185 flow [2024-11-20 09:45:24,500 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-11-20 09:45:24,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2024-11-20 09:45:24,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 243 transitions. [2024-11-20 09:45:24,501 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5424107142857143 [2024-11-20 09:45:24,501 INFO L175 Difference]: Start difference. First operand has 57 places, 59 transitions, 454 flow. Second operand 16 states and 243 transitions. [2024-11-20 09:45:24,501 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 184 transitions, 1185 flow [2024-11-20 09:45:24,512 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 184 transitions, 1145 flow, removed 17 selfloop flow, removed 1 redundant places. [2024-11-20 09:45:24,514 INFO L231 Difference]: Finished difference. Result has 77 places, 52 transitions, 451 flow [2024-11-20 09:45:24,515 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=373, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=52, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=451, PETRI_PLACES=77, PETRI_TRANSITIONS=52} [2024-11-20 09:45:24,515 INFO L277 CegarLoopForPetriNet]: 27 programPoint places, 50 predicate places. [2024-11-20 09:45:24,516 INFO L471 AbstractCegarLoop]: Abstraction has has 77 places, 52 transitions, 451 flow [2024-11-20 09:45:24,516 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 7.875) internal successors, (189), 24 states have internal predecessors, (189), 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) [2024-11-20 09:45:24,516 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 09:45:24,516 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] [2024-11-20 09:45:24,525 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2024-11-20 09:45:24,720 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 09:45:24,720 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-20 09:45:24,721 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 09:45:24,721 INFO L85 PathProgramCache]: Analyzing trace with hash -1647887852, now seen corresponding path program 5 times [2024-11-20 09:45:24,721 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 09:45:24,721 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1220055655] [2024-11-20 09:45:24,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 09:45:24,721 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 09:45:24,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 09:45:25,148 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 3 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 09:45:25,149 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 09:45:25,149 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1220055655] [2024-11-20 09:45:25,149 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1220055655] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-20 09:45:25,149 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [621284562] [2024-11-20 09:45:25,149 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-20 09:45:25,149 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 09:45:25,150 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-20 09:45:25,152 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) [2024-11-20 09:45:25,153 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-20 09:45:25,232 INFO L227 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2024-11-20 09:45:25,233 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-20 09:45:25,234 INFO L255 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-11-20 09:45:25,236 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-20 09:45:25,315 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-20 09:45:25,316 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-20 09:45:25,345 INFO L349 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2024-11-20 09:45:25,345 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 25 treesize of output 13 [2024-11-20 09:45:25,367 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-20 09:45:25,368 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [621284562] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-20 09:45:25,368 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-20 09:45:25,368 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 6, 6] total 13 [2024-11-20 09:45:25,369 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1294595805] [2024-11-20 09:45:25,369 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-20 09:45:25,369 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-11-20 09:45:25,369 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 09:45:25,370 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-11-20 09:45:25,370 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=152, Unknown=0, NotChecked=0, Total=182 [2024-11-20 09:45:25,370 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 28 [2024-11-20 09:45:25,371 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 77 places, 52 transitions, 451 flow. Second operand has 14 states, 14 states have (on average 8.714285714285714) internal successors, (122), 14 states have internal predecessors, (122), 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) [2024-11-20 09:45:25,371 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 09:45:25,371 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 28 [2024-11-20 09:45:25,371 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 09:45:26,182 INFO L124 PetriNetUnfolderBase]: 2502/4441 cut-off events. [2024-11-20 09:45:26,185 INFO L125 PetriNetUnfolderBase]: For 9587/9587 co-relation queries the response was YES. [2024-11-20 09:45:26,197 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12194 conditions, 4441 events. 2502/4441 cut-off events. For 9587/9587 co-relation queries the response was YES. Maximal size of possible extension queue 124. Compared 26053 event pairs, 455 based on Foata normal form. 6/3743 useless extension candidates. Maximal degree in co-relation 12171. Up to 800 conditions per place. [2024-11-20 09:45:26,212 INFO L140 encePairwiseOnDemand]: 22/28 looper letters, 94 selfloop transitions, 32 changer transitions 41/170 dead transitions. [2024-11-20 09:45:26,213 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 87 places, 170 transitions, 1144 flow [2024-11-20 09:45:26,213 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-11-20 09:45:26,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2024-11-20 09:45:26,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 223 transitions. [2024-11-20 09:45:26,214 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5688775510204082 [2024-11-20 09:45:26,214 INFO L175 Difference]: Start difference. First operand has 77 places, 52 transitions, 451 flow. Second operand 14 states and 223 transitions. [2024-11-20 09:45:26,214 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 87 places, 170 transitions, 1144 flow [2024-11-20 09:45:26,239 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 170 transitions, 1055 flow, removed 19 selfloop flow, removed 11 redundant places. [2024-11-20 09:45:26,241 INFO L231 Difference]: Finished difference. Result has 81 places, 57 transitions, 544 flow [2024-11-20 09:45:26,242 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=372, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=52, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=544, PETRI_PLACES=81, PETRI_TRANSITIONS=57} [2024-11-20 09:45:26,243 INFO L277 CegarLoopForPetriNet]: 27 programPoint places, 54 predicate places. [2024-11-20 09:45:26,243 INFO L471 AbstractCegarLoop]: Abstraction has has 81 places, 57 transitions, 544 flow [2024-11-20 09:45:26,244 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 8.714285714285714) internal successors, (122), 14 states have internal predecessors, (122), 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) [2024-11-20 09:45:26,245 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 09:45:26,245 INFO L204 CegarLoopForPetriNet]: trace histogram [4, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-20 09:45:26,254 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-11-20 09:45:26,445 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 09:45:26,446 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-20 09:45:26,446 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 09:45:26,446 INFO L85 PathProgramCache]: Analyzing trace with hash -128097924, now seen corresponding path program 6 times [2024-11-20 09:45:26,446 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 09:45:26,446 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [511575916] [2024-11-20 09:45:26,446 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 09:45:26,446 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 09:45:26,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 09:45:26,559 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 10 proven. 4 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-11-20 09:45:26,559 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 09:45:26,559 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [511575916] [2024-11-20 09:45:26,559 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [511575916] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-20 09:45:26,560 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [159586171] [2024-11-20 09:45:26,560 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-20 09:45:26,560 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 09:45:26,560 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-20 09:45:26,562 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) [2024-11-20 09:45:26,563 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-11-20 09:45:26,631 INFO L227 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2024-11-20 09:45:26,632 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-20 09:45:26,633 INFO L255 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-20 09:45:26,634 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-20 09:45:26,697 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 13 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-11-20 09:45:26,697 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-20 09:45:26,772 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 10 proven. 4 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-11-20 09:45:26,772 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [159586171] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-20 09:45:26,772 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-20 09:45:26,772 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 11 [2024-11-20 09:45:26,772 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1834175412] [2024-11-20 09:45:26,772 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-20 09:45:26,773 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-11-20 09:45:26,773 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 09:45:26,774 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-11-20 09:45:26,774 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2024-11-20 09:45:26,774 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 28 [2024-11-20 09:45:26,774 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 81 places, 57 transitions, 544 flow. Second operand has 12 states, 12 states have (on average 8.333333333333334) internal successors, (100), 12 states have internal predecessors, (100), 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) [2024-11-20 09:45:26,774 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 09:45:26,774 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 28 [2024-11-20 09:45:26,774 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 09:45:27,142 INFO L124 PetriNetUnfolderBase]: 2202/3905 cut-off events. [2024-11-20 09:45:27,142 INFO L125 PetriNetUnfolderBase]: For 8765/8765 co-relation queries the response was YES. [2024-11-20 09:45:27,160 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10885 conditions, 3905 events. 2202/3905 cut-off events. For 8765/8765 co-relation queries the response was YES. Maximal size of possible extension queue 110. Compared 23036 event pairs, 1930 based on Foata normal form. 12/3303 useless extension candidates. Maximal degree in co-relation 10860. Up to 3610 conditions per place. [2024-11-20 09:45:27,179 INFO L140 encePairwiseOnDemand]: 24/28 looper letters, 45 selfloop transitions, 3 changer transitions 29/80 dead transitions. [2024-11-20 09:45:27,179 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 84 places, 80 transitions, 716 flow [2024-11-20 09:45:27,180 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-20 09:45:27,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-20 09:45:27,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 82 transitions. [2024-11-20 09:45:27,181 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4880952380952381 [2024-11-20 09:45:27,181 INFO L175 Difference]: Start difference. First operand has 81 places, 57 transitions, 544 flow. Second operand 6 states and 82 transitions. [2024-11-20 09:45:27,181 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 84 places, 80 transitions, 716 flow [2024-11-20 09:45:27,211 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 80 transitions, 594 flow, removed 27 selfloop flow, removed 13 redundant places. [2024-11-20 09:45:27,212 INFO L231 Difference]: Finished difference. Result has 72 places, 51 transitions, 375 flow [2024-11-20 09:45:27,213 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=379, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=53, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=375, PETRI_PLACES=72, PETRI_TRANSITIONS=51} [2024-11-20 09:45:27,214 INFO L277 CegarLoopForPetriNet]: 27 programPoint places, 45 predicate places. [2024-11-20 09:45:27,214 INFO L471 AbstractCegarLoop]: Abstraction has has 72 places, 51 transitions, 375 flow [2024-11-20 09:45:27,215 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 8.333333333333334) internal successors, (100), 12 states have internal predecessors, (100), 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) [2024-11-20 09:45:27,215 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 09:45:27,215 INFO L204 CegarLoopForPetriNet]: trace histogram [4, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-20 09:45:27,225 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2024-11-20 09:45:27,415 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 09:45:27,416 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-20 09:45:27,416 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 09:45:27,416 INFO L85 PathProgramCache]: Analyzing trace with hash -951130530, now seen corresponding path program 7 times [2024-11-20 09:45:27,416 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 09:45:27,417 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1861177052] [2024-11-20 09:45:27,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 09:45:27,417 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 09:45:27,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 09:45:27,507 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 12 proven. 8 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-20 09:45:27,507 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 09:45:27,507 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1861177052] [2024-11-20 09:45:27,507 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1861177052] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-20 09:45:27,507 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [951442364] [2024-11-20 09:45:27,507 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-20 09:45:27,507 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 09:45:27,508 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-20 09:45:27,510 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-20 09:45:27,512 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-11-20 09:45:27,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 09:45:27,588 INFO L255 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-11-20 09:45:27,589 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-20 09:45:27,706 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 15 proven. 3 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-11-20 09:45:27,706 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-20 09:45:27,846 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 6 proven. 12 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-11-20 09:45:27,846 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [951442364] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-20 09:45:27,846 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-20 09:45:27,847 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 7, 7] total 15 [2024-11-20 09:45:27,847 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2124833981] [2024-11-20 09:45:27,847 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-20 09:45:27,847 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-11-20 09:45:27,847 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 09:45:27,848 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-11-20 09:45:27,848 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=178, Unknown=0, NotChecked=0, Total=240 [2024-11-20 09:45:27,848 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 28 [2024-11-20 09:45:27,848 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 51 transitions, 375 flow. Second operand has 16 states, 16 states have (on average 8.9375) internal successors, (143), 16 states have internal predecessors, (143), 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) [2024-11-20 09:45:27,848 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 09:45:27,848 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 28 [2024-11-20 09:45:27,849 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 09:45:28,501 INFO L124 PetriNetUnfolderBase]: 3332/5819 cut-off events. [2024-11-20 09:45:28,501 INFO L125 PetriNetUnfolderBase]: For 9060/9060 co-relation queries the response was YES. [2024-11-20 09:45:28,516 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15462 conditions, 5819 events. 3332/5819 cut-off events. For 9060/9060 co-relation queries the response was YES. Maximal size of possible extension queue 164. Compared 34490 event pairs, 842 based on Foata normal form. 33/4944 useless extension candidates. Maximal degree in co-relation 15439. Up to 1506 conditions per place. [2024-11-20 09:45:28,530 INFO L140 encePairwiseOnDemand]: 23/28 looper letters, 72 selfloop transitions, 31 changer transitions 67/173 dead transitions. [2024-11-20 09:45:28,531 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 80 places, 173 transitions, 1199 flow [2024-11-20 09:45:28,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-11-20 09:45:28,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-11-20 09:45:28,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 204 transitions. [2024-11-20 09:45:28,532 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5604395604395604 [2024-11-20 09:45:28,532 INFO L175 Difference]: Start difference. First operand has 72 places, 51 transitions, 375 flow. Second operand 13 states and 204 transitions. [2024-11-20 09:45:28,533 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 80 places, 173 transitions, 1199 flow [2024-11-20 09:45:28,550 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 173 transitions, 1188 flow, removed 1 selfloop flow, removed 5 redundant places. [2024-11-20 09:45:28,552 INFO L231 Difference]: Finished difference. Result has 76 places, 64 transitions, 614 flow [2024-11-20 09:45:28,553 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=364, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=614, PETRI_PLACES=76, PETRI_TRANSITIONS=64} [2024-11-20 09:45:28,553 INFO L277 CegarLoopForPetriNet]: 27 programPoint places, 49 predicate places. [2024-11-20 09:45:28,553 INFO L471 AbstractCegarLoop]: Abstraction has has 76 places, 64 transitions, 614 flow [2024-11-20 09:45:28,554 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 8.9375) internal successors, (143), 16 states have internal predecessors, (143), 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) [2024-11-20 09:45:28,554 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 09:45:28,554 INFO L204 CegarLoopForPetriNet]: trace histogram [4, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-20 09:45:28,561 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2024-11-20 09:45:28,754 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 09:45:28,755 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-20 09:45:28,755 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 09:45:28,756 INFO L85 PathProgramCache]: Analyzing trace with hash -846417175, now seen corresponding path program 8 times [2024-11-20 09:45:28,756 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 09:45:28,756 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [793570255] [2024-11-20 09:45:28,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 09:45:28,756 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 09:45:28,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 09:45:29,304 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 3 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 09:45:29,305 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 09:45:29,305 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [793570255] [2024-11-20 09:45:29,305 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [793570255] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-20 09:45:29,305 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1700224810] [2024-11-20 09:45:29,305 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-20 09:45:29,306 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 09:45:29,306 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-20 09:45:29,308 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-20 09:45:29,309 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-11-20 09:45:29,390 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-20 09:45:29,391 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-20 09:45:29,393 INFO L255 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 24 conjuncts are in the unsatisfiable core [2024-11-20 09:45:29,395 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-20 09:45:29,761 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2024-11-20 09:45:29,762 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 23 treesize of output 10 [2024-11-20 09:45:29,774 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 10 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 09:45:29,774 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-20 09:45:29,819 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2024-11-20 09:45:29,819 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 11 [2024-11-20 09:45:30,416 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 3 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 09:45:30,416 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1700224810] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-20 09:45:30,416 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-20 09:45:30,416 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 32 [2024-11-20 09:45:30,417 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [796397418] [2024-11-20 09:45:30,417 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-20 09:45:30,417 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2024-11-20 09:45:30,418 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 09:45:30,418 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2024-11-20 09:45:30,418 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=883, Unknown=0, NotChecked=0, Total=1056 [2024-11-20 09:45:30,419 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 28 [2024-11-20 09:45:30,423 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 64 transitions, 614 flow. Second operand has 33 states, 33 states have (on average 7.7272727272727275) internal successors, (255), 33 states have internal predecessors, (255), 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) [2024-11-20 09:45:30,423 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 09:45:30,423 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 28 [2024-11-20 09:45:30,423 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 09:45:32,363 INFO L124 PetriNetUnfolderBase]: 5351/9326 cut-off events. [2024-11-20 09:45:32,363 INFO L125 PetriNetUnfolderBase]: For 23509/23509 co-relation queries the response was YES. [2024-11-20 09:45:32,383 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25921 conditions, 9326 events. 5351/9326 cut-off events. For 23509/23509 co-relation queries the response was YES. Maximal size of possible extension queue 266. Compared 59158 event pairs, 561 based on Foata normal form. 129/7986 useless extension candidates. Maximal degree in co-relation 25898. Up to 1725 conditions per place. [2024-11-20 09:45:32,407 INFO L140 encePairwiseOnDemand]: 22/28 looper letters, 233 selfloop transitions, 77 changer transitions 69/382 dead transitions. [2024-11-20 09:45:32,407 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 95 places, 382 transitions, 2670 flow [2024-11-20 09:45:32,407 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2024-11-20 09:45:32,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2024-11-20 09:45:32,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 499 transitions. [2024-11-20 09:45:32,409 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.594047619047619 [2024-11-20 09:45:32,409 INFO L175 Difference]: Start difference. First operand has 76 places, 64 transitions, 614 flow. Second operand 30 states and 499 transitions. [2024-11-20 09:45:32,410 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 95 places, 382 transitions, 2670 flow [2024-11-20 09:45:32,449 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 88 places, 382 transitions, 2422 flow, removed 120 selfloop flow, removed 7 redundant places. [2024-11-20 09:45:32,453 INFO L231 Difference]: Finished difference. Result has 102 places, 101 transitions, 1171 flow [2024-11-20 09:45:32,454 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=558, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=64, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=20, PETRI_DIFFERENCE_SUBTRAHEND_STATES=30, PETRI_FLOW=1171, PETRI_PLACES=102, PETRI_TRANSITIONS=101} [2024-11-20 09:45:32,456 INFO L277 CegarLoopForPetriNet]: 27 programPoint places, 75 predicate places. [2024-11-20 09:45:32,456 INFO L471 AbstractCegarLoop]: Abstraction has has 102 places, 101 transitions, 1171 flow [2024-11-20 09:45:32,456 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 7.7272727272727275) internal successors, (255), 33 states have internal predecessors, (255), 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) [2024-11-20 09:45:32,457 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 09:45:32,457 INFO L204 CegarLoopForPetriNet]: trace histogram [4, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-20 09:45:32,467 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2024-11-20 09:45:32,660 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2024-11-20 09:45:32,661 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-20 09:45:32,662 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 09:45:32,662 INFO L85 PathProgramCache]: Analyzing trace with hash -591025093, now seen corresponding path program 9 times [2024-11-20 09:45:32,662 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 09:45:32,663 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [770944853] [2024-11-20 09:45:32,663 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 09:45:32,663 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 09:45:32,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 09:45:33,337 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 2 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 09:45:33,338 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 09:45:33,338 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [770944853] [2024-11-20 09:45:33,338 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [770944853] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-20 09:45:33,338 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1361246103] [2024-11-20 09:45:33,339 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-20 09:45:33,339 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 09:45:33,339 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-20 09:45:33,341 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-20 09:45:33,343 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-11-20 09:45:33,441 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-11-20 09:45:33,441 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-20 09:45:33,444 INFO L255 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 21 conjuncts are in the unsatisfiable core [2024-11-20 09:45:33,446 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-20 09:45:33,862 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 15 proven. 12 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-11-20 09:45:33,863 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-20 09:45:34,106 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2024-11-20 09:45:34,107 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 11 [2024-11-20 09:45:34,220 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-11-20 09:45:34,220 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1361246103] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-20 09:45:34,220 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-20 09:45:34,220 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10, 10] total 27 [2024-11-20 09:45:34,220 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [892712904] [2024-11-20 09:45:34,220 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-20 09:45:34,221 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2024-11-20 09:45:34,221 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 09:45:34,221 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2024-11-20 09:45:34,221 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=142, Invalid=614, Unknown=0, NotChecked=0, Total=756 [2024-11-20 09:45:34,222 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 28 [2024-11-20 09:45:34,222 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 102 places, 101 transitions, 1171 flow. Second operand has 28 states, 28 states have (on average 7.821428571428571) internal successors, (219), 28 states have internal predecessors, (219), 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) [2024-11-20 09:45:34,222 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 09:45:34,222 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 28 [2024-11-20 09:45:34,222 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 09:45:35,943 INFO L124 PetriNetUnfolderBase]: 6019/10494 cut-off events. [2024-11-20 09:45:35,944 INFO L125 PetriNetUnfolderBase]: For 25350/25350 co-relation queries the response was YES. [2024-11-20 09:45:35,965 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29361 conditions, 10494 events. 6019/10494 cut-off events. For 25350/25350 co-relation queries the response was YES. Maximal size of possible extension queue 294. Compared 69591 event pairs, 2098 based on Foata normal form. 2/8838 useless extension candidates. Maximal degree in co-relation 29327. Up to 4746 conditions per place. [2024-11-20 09:45:35,981 INFO L140 encePairwiseOnDemand]: 22/28 looper letters, 72 selfloop transitions, 8 changer transitions 178/261 dead transitions. [2024-11-20 09:45:35,981 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 118 places, 261 transitions, 2374 flow [2024-11-20 09:45:35,982 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-11-20 09:45:35,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2024-11-20 09:45:35,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 260 transitions. [2024-11-20 09:45:35,983 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5462184873949579 [2024-11-20 09:45:35,983 INFO L175 Difference]: Start difference. First operand has 102 places, 101 transitions, 1171 flow. Second operand 17 states and 260 transitions. [2024-11-20 09:45:35,983 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 118 places, 261 transitions, 2374 flow [2024-11-20 09:45:36,097 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 111 places, 261 transitions, 2255 flow, removed 39 selfloop flow, removed 7 redundant places. [2024-11-20 09:45:36,100 INFO L231 Difference]: Finished difference. Result has 112 places, 72 transitions, 713 flow [2024-11-20 09:45:36,101 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=1072, PETRI_DIFFERENCE_MINUEND_PLACES=95, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=101, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=93, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=713, PETRI_PLACES=112, PETRI_TRANSITIONS=72} [2024-11-20 09:45:36,101 INFO L277 CegarLoopForPetriNet]: 27 programPoint places, 85 predicate places. [2024-11-20 09:45:36,101 INFO L471 AbstractCegarLoop]: Abstraction has has 112 places, 72 transitions, 713 flow [2024-11-20 09:45:36,102 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 7.821428571428571) internal successors, (219), 28 states have internal predecessors, (219), 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) [2024-11-20 09:45:36,102 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 09:45:36,102 INFO L204 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-20 09:45:36,114 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2024-11-20 09:45:36,306 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2024-11-20 09:45:36,306 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-20 09:45:36,306 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 09:45:36,306 INFO L85 PathProgramCache]: Analyzing trace with hash -275602663, now seen corresponding path program 10 times [2024-11-20 09:45:36,307 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 09:45:36,307 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1036832865] [2024-11-20 09:45:36,307 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 09:45:36,307 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 09:45:36,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 09:45:37,434 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 09:45:37,435 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 09:45:37,435 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1036832865] [2024-11-20 09:45:37,435 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1036832865] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-20 09:45:37,435 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1221828928] [2024-11-20 09:45:37,435 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-20 09:45:37,436 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 09:45:37,436 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-20 09:45:37,438 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-20 09:45:37,440 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-11-20 09:45:37,531 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-20 09:45:37,531 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-20 09:45:37,536 INFO L255 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 24 conjuncts are in the unsatisfiable core [2024-11-20 09:45:37,538 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-20 09:45:37,786 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-20 09:45:37,787 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-20 09:45:37,837 INFO L349 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2024-11-20 09:45:37,837 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 13 [2024-11-20 09:45:37,876 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-11-20 09:45:37,876 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1221828928] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-20 09:45:37,876 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-20 09:45:37,877 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11, 8] total 22 [2024-11-20 09:45:37,877 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [621286951] [2024-11-20 09:45:37,877 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-20 09:45:37,878 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2024-11-20 09:45:37,878 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 09:45:37,878 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2024-11-20 09:45:37,879 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=444, Unknown=0, NotChecked=0, Total=506 [2024-11-20 09:45:37,879 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 28 [2024-11-20 09:45:37,879 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 112 places, 72 transitions, 713 flow. Second operand has 23 states, 23 states have (on average 8.043478260869565) internal successors, (185), 23 states have internal predecessors, (185), 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) [2024-11-20 09:45:37,879 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 09:45:37,880 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 28 [2024-11-20 09:45:37,880 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 09:45:39,716 INFO L124 PetriNetUnfolderBase]: 5286/9078 cut-off events. [2024-11-20 09:45:39,716 INFO L125 PetriNetUnfolderBase]: For 26357/26357 co-relation queries the response was YES. [2024-11-20 09:45:39,737 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26150 conditions, 9078 events. 5286/9078 cut-off events. For 26357/26357 co-relation queries the response was YES. Maximal size of possible extension queue 231. Compared 55926 event pairs, 676 based on Foata normal form. 15/7687 useless extension candidates. Maximal degree in co-relation 26115. Up to 1650 conditions per place. [2024-11-20 09:45:39,753 INFO L140 encePairwiseOnDemand]: 22/28 looper letters, 137 selfloop transitions, 85 changer transitions 69/294 dead transitions. [2024-11-20 09:45:39,754 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 111 places, 294 transitions, 2241 flow [2024-11-20 09:45:39,756 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2024-11-20 09:45:39,757 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2024-11-20 09:45:39,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 356 transitions. [2024-11-20 09:45:39,758 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.577922077922078 [2024-11-20 09:45:39,758 INFO L175 Difference]: Start difference. First operand has 112 places, 72 transitions, 713 flow. Second operand 22 states and 356 transitions. [2024-11-20 09:45:39,758 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 111 places, 294 transitions, 2241 flow [2024-11-20 09:45:39,950 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 92 places, 294 transitions, 1942 flow, removed 79 selfloop flow, removed 19 redundant places. [2024-11-20 09:45:39,955 INFO L231 Difference]: Finished difference. Result has 105 places, 107 transitions, 1272 flow [2024-11-20 09:45:39,955 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=566, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=72, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=19, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=1272, PETRI_PLACES=105, PETRI_TRANSITIONS=107} [2024-11-20 09:45:39,956 INFO L277 CegarLoopForPetriNet]: 27 programPoint places, 78 predicate places. [2024-11-20 09:45:39,956 INFO L471 AbstractCegarLoop]: Abstraction has has 105 places, 107 transitions, 1272 flow [2024-11-20 09:45:39,956 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 8.043478260869565) internal successors, (185), 23 states have internal predecessors, (185), 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) [2024-11-20 09:45:39,956 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 09:45:39,957 INFO L204 CegarLoopForPetriNet]: trace histogram [5, 4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-20 09:45:39,965 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2024-11-20 09:45:40,157 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2024-11-20 09:45:40,158 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-20 09:45:40,158 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 09:45:40,158 INFO L85 PathProgramCache]: Analyzing trace with hash 933594221, now seen corresponding path program 11 times [2024-11-20 09:45:40,158 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 09:45:40,158 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [580321786] [2024-11-20 09:45:40,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 09:45:40,158 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 09:45:40,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 09:45:40,273 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 20 proven. 19 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-11-20 09:45:40,274 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 09:45:40,274 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [580321786] [2024-11-20 09:45:40,274 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [580321786] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-20 09:45:40,274 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [592945378] [2024-11-20 09:45:40,274 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-20 09:45:40,275 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 09:45:40,275 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-20 09:45:40,277 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-20 09:45:40,279 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-11-20 09:45:40,384 INFO L227 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2024-11-20 09:45:40,384 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-20 09:45:40,386 INFO L255 TraceCheckSpWp]: Trace formula consists of 205 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-20 09:45:40,387 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-20 09:45:40,433 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 20 proven. 19 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-11-20 09:45:40,433 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-20 09:45:40,607 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 13 proven. 28 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-11-20 09:45:40,608 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [592945378] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-20 09:45:40,608 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-20 09:45:40,608 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 8] total 12 [2024-11-20 09:45:40,608 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1714083627] [2024-11-20 09:45:40,608 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-20 09:45:40,609 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-11-20 09:45:40,609 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 09:45:40,610 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-11-20 09:45:40,610 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=96, Unknown=0, NotChecked=0, Total=156 [2024-11-20 09:45:40,611 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 28 [2024-11-20 09:45:40,611 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 105 places, 107 transitions, 1272 flow. Second operand has 13 states, 13 states have (on average 10.153846153846153) internal successors, (132), 13 states have internal predecessors, (132), 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) [2024-11-20 09:45:40,611 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 09:45:40,611 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 28 [2024-11-20 09:45:40,611 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 09:45:42,090 INFO L124 PetriNetUnfolderBase]: 9364/16040 cut-off events. [2024-11-20 09:45:42,090 INFO L125 PetriNetUnfolderBase]: For 31889/31889 co-relation queries the response was YES. [2024-11-20 09:45:42,139 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43789 conditions, 16040 events. 9364/16040 cut-off events. For 31889/31889 co-relation queries the response was YES. Maximal size of possible extension queue 414. Compared 109506 event pairs, 1913 based on Foata normal form. 22/13577 useless extension candidates. Maximal degree in co-relation 43752. Up to 4280 conditions per place. [2024-11-20 09:45:42,169 INFO L140 encePairwiseOnDemand]: 25/28 looper letters, 109 selfloop transitions, 104 changer transitions 0/216 dead transitions. [2024-11-20 09:45:42,170 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 110 places, 216 transitions, 2804 flow [2024-11-20 09:45:42,170 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-20 09:45:42,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-20 09:45:42,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 114 transitions. [2024-11-20 09:45:42,171 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6785714285714286 [2024-11-20 09:45:42,171 INFO L175 Difference]: Start difference. First operand has 105 places, 107 transitions, 1272 flow. Second operand 6 states and 114 transitions. [2024-11-20 09:45:42,171 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 110 places, 216 transitions, 2804 flow [2024-11-20 09:45:42,273 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 105 places, 216 transitions, 2647 flow, removed 70 selfloop flow, removed 5 redundant places. [2024-11-20 09:45:42,277 INFO L231 Difference]: Finished difference. Result has 106 places, 160 transitions, 2203 flow [2024-11-20 09:45:42,277 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=1211, PETRI_DIFFERENCE_MINUEND_PLACES=100, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=107, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=66, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2203, PETRI_PLACES=106, PETRI_TRANSITIONS=160} [2024-11-20 09:45:42,278 INFO L277 CegarLoopForPetriNet]: 27 programPoint places, 79 predicate places. [2024-11-20 09:45:42,278 INFO L471 AbstractCegarLoop]: Abstraction has has 106 places, 160 transitions, 2203 flow [2024-11-20 09:45:42,278 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 10.153846153846153) internal successors, (132), 13 states have internal predecessors, (132), 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) [2024-11-20 09:45:42,278 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 09:45:42,278 INFO L204 CegarLoopForPetriNet]: trace histogram [5, 5, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-20 09:45:42,288 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2024-11-20 09:45:42,479 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2024-11-20 09:45:42,479 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-20 09:45:42,480 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 09:45:42,480 INFO L85 PathProgramCache]: Analyzing trace with hash -1233165350, now seen corresponding path program 12 times [2024-11-20 09:45:42,480 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 09:45:42,480 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [775130202] [2024-11-20 09:45:42,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 09:45:42,480 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 09:45:42,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 09:45:43,283 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 9 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 09:45:43,283 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 09:45:43,283 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [775130202] [2024-11-20 09:45:43,283 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [775130202] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-20 09:45:43,283 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1542739409] [2024-11-20 09:45:43,283 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-20 09:45:43,284 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 09:45:43,284 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-20 09:45:43,288 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-20 09:45:43,290 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-11-20 09:45:43,453 INFO L227 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2024-11-20 09:45:43,453 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-20 09:45:43,455 INFO L255 TraceCheckSpWp]: Trace formula consists of 202 conjuncts, 38 conjuncts are in the unsatisfiable core [2024-11-20 09:45:43,456 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-20 09:45:44,148 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-20 09:45:44,149 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-20 09:45:44,153 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-20 09:45:44,153 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-20 09:45:44,154 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-20 09:45:44,163 INFO L349 Elim1Store]: treesize reduction 32, result has 8.6 percent of original size [2024-11-20 09:45:44,163 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 48 treesize of output 19 [2024-11-20 09:45:44,174 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 24 proven. 29 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-11-20 09:45:44,174 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-20 09:45:44,708 INFO L349 Elim1Store]: treesize reduction 64, result has 19.0 percent of original size [2024-11-20 09:45:44,709 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 61 treesize of output 34 [2024-11-20 09:45:45,015 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 6 proven. 47 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-11-20 09:45:45,015 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1542739409] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-20 09:45:45,015 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-20 09:45:45,015 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 12, 12] total 35 [2024-11-20 09:45:45,015 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [552868104] [2024-11-20 09:45:45,015 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-20 09:45:45,016 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2024-11-20 09:45:45,016 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 09:45:45,016 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2024-11-20 09:45:45,017 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=185, Invalid=1075, Unknown=0, NotChecked=0, Total=1260 [2024-11-20 09:45:45,017 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 28 [2024-11-20 09:45:45,017 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 106 places, 160 transitions, 2203 flow. Second operand has 36 states, 36 states have (on average 7.75) internal successors, (279), 36 states have internal predecessors, (279), 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) [2024-11-20 09:45:45,017 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 09:45:45,017 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 28 [2024-11-20 09:45:45,017 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 09:45:52,063 INFO L124 PetriNetUnfolderBase]: 10628/18536 cut-off events. [2024-11-20 09:45:52,063 INFO L125 PetriNetUnfolderBase]: For 45055/45055 co-relation queries the response was YES. [2024-11-20 09:45:52,109 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51355 conditions, 18536 events. 10628/18536 cut-off events. For 45055/45055 co-relation queries the response was YES. Maximal size of possible extension queue 520. Compared 135580 event pairs, 3792 based on Foata normal form. 344/15937 useless extension candidates. Maximal degree in co-relation 51317. Up to 10581 conditions per place. [2024-11-20 09:45:52,133 INFO L140 encePairwiseOnDemand]: 22/28 looper letters, 117 selfloop transitions, 11 changer transitions 319/450 dead transitions. [2024-11-20 09:45:52,133 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 136 places, 450 transitions, 4019 flow [2024-11-20 09:45:52,134 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2024-11-20 09:45:52,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2024-11-20 09:45:52,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 487 transitions. [2024-11-20 09:45:52,135 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5610599078341014 [2024-11-20 09:45:52,135 INFO L175 Difference]: Start difference. First operand has 106 places, 160 transitions, 2203 flow. Second operand 31 states and 487 transitions. [2024-11-20 09:45:52,135 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 136 places, 450 transitions, 4019 flow [2024-11-20 09:45:52,274 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 136 places, 450 transitions, 3957 flow, removed 31 selfloop flow, removed 0 redundant places. [2024-11-20 09:45:52,279 INFO L231 Difference]: Finished difference. Result has 155 places, 119 transitions, 1665 flow [2024-11-20 09:45:52,279 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=1911, PETRI_DIFFERENCE_MINUEND_PLACES=106, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=144, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=133, PETRI_DIFFERENCE_SUBTRAHEND_STATES=31, PETRI_FLOW=1665, PETRI_PLACES=155, PETRI_TRANSITIONS=119} [2024-11-20 09:45:52,279 INFO L277 CegarLoopForPetriNet]: 27 programPoint places, 128 predicate places. [2024-11-20 09:45:52,280 INFO L471 AbstractCegarLoop]: Abstraction has has 155 places, 119 transitions, 1665 flow [2024-11-20 09:45:52,280 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 7.75) internal successors, (279), 36 states have internal predecessors, (279), 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) [2024-11-20 09:45:52,280 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 09:45:52,280 INFO L204 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-20 09:45:52,289 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2024-11-20 09:45:52,481 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2024-11-20 09:45:52,481 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-20 09:45:52,482 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 09:45:52,482 INFO L85 PathProgramCache]: Analyzing trace with hash -1235183926, now seen corresponding path program 13 times [2024-11-20 09:45:52,482 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 09:45:52,482 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [46493123] [2024-11-20 09:45:52,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 09:45:52,482 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 09:45:52,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 09:45:53,626 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 0 proven. 67 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 09:45:53,626 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 09:45:53,626 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [46493123] [2024-11-20 09:45:53,626 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [46493123] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-20 09:45:53,626 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1890643191] [2024-11-20 09:45:53,626 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-20 09:45:53,626 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 09:45:53,627 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-20 09:45:53,628 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-20 09:45:53,629 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-11-20 09:45:53,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 09:45:53,707 INFO L255 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 30 conjuncts are in the unsatisfiable core [2024-11-20 09:45:53,708 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-20 09:45:53,991 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-20 09:45:53,992 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-20 09:45:54,018 INFO L349 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2024-11-20 09:45:54,018 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 25 treesize of output 13 [2024-11-20 09:45:54,044 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 0 proven. 52 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-11-20 09:45:54,044 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1890643191] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-20 09:45:54,044 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-20 09:45:54,044 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14, 10] total 28 [2024-11-20 09:45:54,044 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [424874355] [2024-11-20 09:45:54,044 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-20 09:45:54,045 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2024-11-20 09:45:54,045 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 09:45:54,045 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2024-11-20 09:45:54,046 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=731, Unknown=0, NotChecked=0, Total=812 [2024-11-20 09:45:54,046 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 28 [2024-11-20 09:45:54,046 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 155 places, 119 transitions, 1665 flow. Second operand has 29 states, 29 states have (on average 7.896551724137931) internal successors, (229), 29 states have internal predecessors, (229), 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) [2024-11-20 09:45:54,046 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 09:45:54,046 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 28 [2024-11-20 09:45:54,047 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 09:45:57,630 INFO L124 PetriNetUnfolderBase]: 12404/21201 cut-off events. [2024-11-20 09:45:57,630 INFO L125 PetriNetUnfolderBase]: For 70822/70822 co-relation queries the response was YES. [2024-11-20 09:45:57,733 INFO L83 FinitePrefix]: Finished finitePrefix Result has 63688 conditions, 21201 events. 12404/21201 cut-off events. For 70822/70822 co-relation queries the response was YES. Maximal size of possible extension queue 520. Compared 149465 event pairs, 1180 based on Foata normal form. 16/17938 useless extension candidates. Maximal degree in co-relation 63630. Up to 3875 conditions per place. [2024-11-20 09:45:57,899 INFO L140 encePairwiseOnDemand]: 22/28 looper letters, 174 selfloop transitions, 181 changer transitions 93/451 dead transitions. [2024-11-20 09:45:57,899 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 152 places, 451 transitions, 4414 flow [2024-11-20 09:45:57,903 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2024-11-20 09:45:57,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2024-11-20 09:45:57,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 460 transitions. [2024-11-20 09:45:57,905 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5867346938775511 [2024-11-20 09:45:57,905 INFO L175 Difference]: Start difference. First operand has 155 places, 119 transitions, 1665 flow. Second operand 28 states and 460 transitions. [2024-11-20 09:45:57,905 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 152 places, 451 transitions, 4414 flow [2024-11-20 09:45:58,236 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 111 places, 451 transitions, 3960 flow, removed 130 selfloop flow, removed 41 redundant places. [2024-11-20 09:45:58,240 INFO L231 Difference]: Finished difference. Result has 128 places, 203 transitions, 3203 flow [2024-11-20 09:45:58,240 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=1388, PETRI_DIFFERENCE_MINUEND_PLACES=84, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=119, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=98, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=19, PETRI_DIFFERENCE_SUBTRAHEND_STATES=28, PETRI_FLOW=3203, PETRI_PLACES=128, PETRI_TRANSITIONS=203} [2024-11-20 09:45:58,241 INFO L277 CegarLoopForPetriNet]: 27 programPoint places, 101 predicate places. [2024-11-20 09:45:58,241 INFO L471 AbstractCegarLoop]: Abstraction has has 128 places, 203 transitions, 3203 flow [2024-11-20 09:45:58,241 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 7.896551724137931) internal successors, (229), 29 states have internal predecessors, (229), 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) [2024-11-20 09:45:58,241 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 09:45:58,241 INFO L204 CegarLoopForPetriNet]: trace histogram [6, 5, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-20 09:45:58,250 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2024-11-20 09:45:58,442 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2024-11-20 09:45:58,442 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-20 09:45:58,442 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 09:45:58,443 INFO L85 PathProgramCache]: Analyzing trace with hash -1537074276, now seen corresponding path program 14 times [2024-11-20 09:45:58,443 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 09:45:58,443 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1481817320] [2024-11-20 09:45:58,443 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 09:45:58,443 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 09:45:58,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 09:45:58,567 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 32 proven. 32 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2024-11-20 09:45:58,567 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 09:45:58,567 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1481817320] [2024-11-20 09:45:58,567 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1481817320] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-20 09:45:58,567 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1408233489] [2024-11-20 09:45:58,567 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-20 09:45:58,567 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 09:45:58,567 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-20 09:45:58,570 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-20 09:45:58,571 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2024-11-20 09:45:58,662 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-20 09:45:58,662 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-20 09:45:58,663 INFO L255 TraceCheckSpWp]: Trace formula consists of 227 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-11-20 09:45:58,665 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-20 09:45:58,721 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 32 proven. 32 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2024-11-20 09:45:58,722 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-20 09:45:58,938 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 22 proven. 44 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-11-20 09:45:58,938 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1408233489] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-20 09:45:58,938 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-20 09:45:58,938 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 10] total 15 [2024-11-20 09:45:58,938 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [512630600] [2024-11-20 09:45:58,938 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-20 09:45:58,939 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-11-20 09:45:58,939 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 09:45:58,939 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-11-20 09:45:58,939 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=150, Unknown=0, NotChecked=0, Total=240 [2024-11-20 09:45:58,939 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 28 [2024-11-20 09:45:58,940 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 128 places, 203 transitions, 3203 flow. Second operand has 16 states, 16 states have (on average 9.9375) internal successors, (159), 16 states have internal predecessors, (159), 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) [2024-11-20 09:45:58,940 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 09:45:58,940 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 28 [2024-11-20 09:45:58,940 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 09:46:03,041 INFO L124 PetriNetUnfolderBase]: 21442/36597 cut-off events. [2024-11-20 09:46:03,041 INFO L125 PetriNetUnfolderBase]: For 105571/105571 co-relation queries the response was YES. [2024-11-20 09:46:03,279 INFO L83 FinitePrefix]: Finished finitePrefix Result has 106473 conditions, 36597 events. 21442/36597 cut-off events. For 105571/105571 co-relation queries the response was YES. Maximal size of possible extension queue 860. Compared 280732 event pairs, 3835 based on Foata normal form. 22/30959 useless extension candidates. Maximal degree in co-relation 106428. Up to 8952 conditions per place. [2024-11-20 09:46:03,348 INFO L140 encePairwiseOnDemand]: 25/28 looper letters, 156 selfloop transitions, 230 changer transitions 0/389 dead transitions. [2024-11-20 09:46:03,349 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 134 places, 389 transitions, 6396 flow [2024-11-20 09:46:03,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-20 09:46:03,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-11-20 09:46:03,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 135 transitions. [2024-11-20 09:46:03,350 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6887755102040817 [2024-11-20 09:46:03,350 INFO L175 Difference]: Start difference. First operand has 128 places, 203 transitions, 3203 flow. Second operand 7 states and 135 transitions. [2024-11-20 09:46:03,350 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 134 places, 389 transitions, 6396 flow [2024-11-20 09:46:03,824 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 124 places, 389 transitions, 5915 flow, removed 102 selfloop flow, removed 10 redundant places. [2024-11-20 09:46:03,829 INFO L231 Difference]: Finished difference. Result has 125 places, 319 transitions, 5338 flow [2024-11-20 09:46:03,830 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=2848, PETRI_DIFFERENCE_MINUEND_PLACES=118, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=203, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=145, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5338, PETRI_PLACES=125, PETRI_TRANSITIONS=319} [2024-11-20 09:46:03,830 INFO L277 CegarLoopForPetriNet]: 27 programPoint places, 98 predicate places. [2024-11-20 09:46:03,830 INFO L471 AbstractCegarLoop]: Abstraction has has 125 places, 319 transitions, 5338 flow [2024-11-20 09:46:03,830 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 9.9375) internal successors, (159), 16 states have internal predecessors, (159), 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) [2024-11-20 09:46:03,830 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 09:46:03,830 INFO L204 CegarLoopForPetriNet]: trace histogram [6, 6, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-20 09:46:03,837 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2024-11-20 09:46:04,031 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 09:46:04,031 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-20 09:46:04,031 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 09:46:04,032 INFO L85 PathProgramCache]: Analyzing trace with hash -826604279, now seen corresponding path program 15 times [2024-11-20 09:46:04,032 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 09:46:04,032 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1775272706] [2024-11-20 09:46:04,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 09:46:04,032 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 09:46:04,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 09:46:04,761 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 9 proven. 86 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 09:46:04,761 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 09:46:04,761 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1775272706] [2024-11-20 09:46:04,761 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1775272706] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-20 09:46:04,762 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2094342935] [2024-11-20 09:46:04,762 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-20 09:46:04,762 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 09:46:04,762 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-20 09:46:04,763 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-20 09:46:04,764 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2024-11-20 09:46:04,906 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2024-11-20 09:46:04,907 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-20 09:46:04,908 INFO L255 TraceCheckSpWp]: Trace formula consists of 227 conjuncts, 26 conjuncts are in the unsatisfiable core [2024-11-20 09:46:04,910 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-20 09:46:05,337 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 31 proven. 55 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-11-20 09:46:05,337 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-20 09:46:05,497 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2024-11-20 09:46:05,497 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 11 [2024-11-20 09:46:05,995 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 27 proven. 59 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-11-20 09:46:05,996 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2094342935] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-20 09:46:05,996 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-20 09:46:05,996 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 15, 15] total 44 [2024-11-20 09:46:05,996 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [947944706] [2024-11-20 09:46:05,996 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-20 09:46:05,996 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2024-11-20 09:46:05,997 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 09:46:05,997 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2024-11-20 09:46:05,997 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=322, Invalid=1658, Unknown=0, NotChecked=0, Total=1980 [2024-11-20 09:46:05,998 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 28 [2024-11-20 09:46:05,998 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 125 places, 319 transitions, 5338 flow. Second operand has 45 states, 45 states have (on average 7.666666666666667) internal successors, (345), 45 states have internal predecessors, (345), 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) [2024-11-20 09:46:05,998 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 09:46:05,998 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 28 [2024-11-20 09:46:05,998 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 09:46:13,711 INFO L124 PetriNetUnfolderBase]: 22816/39656 cut-off events. [2024-11-20 09:46:13,711 INFO L125 PetriNetUnfolderBase]: For 123032/123032 co-relation queries the response was YES. [2024-11-20 09:46:13,928 INFO L83 FinitePrefix]: Finished finitePrefix Result has 114675 conditions, 39656 events. 22816/39656 cut-off events. For 123032/123032 co-relation queries the response was YES. Maximal size of possible extension queue 1034. Compared 321349 event pairs, 7057 based on Foata normal form. 754/34124 useless extension candidates. Maximal degree in co-relation 114629. Up to 21995 conditions per place. [2024-11-20 09:46:13,978 INFO L140 encePairwiseOnDemand]: 22/28 looper letters, 303 selfloop transitions, 36 changer transitions 346/688 dead transitions. [2024-11-20 09:46:13,978 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 162 places, 688 transitions, 8035 flow [2024-11-20 09:46:13,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2024-11-20 09:46:13,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2024-11-20 09:46:13,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 593 transitions. [2024-11-20 09:46:13,980 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5573308270676691 [2024-11-20 09:46:13,980 INFO L175 Difference]: Start difference. First operand has 125 places, 319 transitions, 5338 flow. Second operand 38 states and 593 transitions. [2024-11-20 09:46:13,980 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 162 places, 688 transitions, 8035 flow [2024-11-20 09:46:14,468 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 162 places, 688 transitions, 7823 flow, removed 106 selfloop flow, removed 0 redundant places. [2024-11-20 09:46:14,475 INFO L231 Difference]: Finished difference. Result has 186 places, 231 transitions, 3919 flow [2024-11-20 09:46:14,475 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=4132, PETRI_DIFFERENCE_MINUEND_PLACES=125, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=262, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=227, PETRI_DIFFERENCE_SUBTRAHEND_STATES=38, PETRI_FLOW=3919, PETRI_PLACES=186, PETRI_TRANSITIONS=231} [2024-11-20 09:46:14,475 INFO L277 CegarLoopForPetriNet]: 27 programPoint places, 159 predicate places. [2024-11-20 09:46:14,476 INFO L471 AbstractCegarLoop]: Abstraction has has 186 places, 231 transitions, 3919 flow [2024-11-20 09:46:14,476 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 7.666666666666667) internal successors, (345), 45 states have internal predecessors, (345), 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) [2024-11-20 09:46:14,476 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 09:46:14,476 INFO L204 CegarLoopForPetriNet]: trace histogram [6, 6, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-20 09:46:14,485 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2024-11-20 09:46:14,677 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 09:46:14,677 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-20 09:46:14,678 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 09:46:14,678 INFO L85 PathProgramCache]: Analyzing trace with hash -1467000485, now seen corresponding path program 16 times [2024-11-20 09:46:14,678 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 09:46:14,678 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1727822242] [2024-11-20 09:46:14,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 09:46:14,678 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 09:46:14,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 09:46:15,680 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 30 proven. 65 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 09:46:15,680 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 09:46:15,680 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1727822242] [2024-11-20 09:46:15,680 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1727822242] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-20 09:46:15,680 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1536934712] [2024-11-20 09:46:15,681 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-20 09:46:15,681 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 09:46:15,681 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-20 09:46:15,682 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-20 09:46:15,683 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2024-11-20 09:46:15,770 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-20 09:46:15,770 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-20 09:46:15,772 INFO L255 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 39 conjuncts are in the unsatisfiable core [2024-11-20 09:46:15,774 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-20 09:46:15,894 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 [2024-11-20 09:46:16,542 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2024-11-20 09:46:16,542 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 23 treesize of output 10 [2024-11-20 09:46:16,552 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 18 proven. 77 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 09:46:16,552 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-20 09:46:17,428 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 39 treesize of output 35 [2024-11-20 09:46:17,525 INFO L349 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2024-11-20 09:46:17,525 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 51 treesize of output 43 [2024-11-20 09:46:17,903 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 28 proven. 67 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 09:46:17,903 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1536934712] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-20 09:46:17,903 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-20 09:46:17,903 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 18] total 50 [2024-11-20 09:46:17,903 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [994817247] [2024-11-20 09:46:17,903 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-20 09:46:17,904 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2024-11-20 09:46:17,904 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 09:46:17,904 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2024-11-20 09:46:17,905 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=266, Invalid=2284, Unknown=0, NotChecked=0, Total=2550 [2024-11-20 09:46:17,906 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 28 [2024-11-20 09:46:17,906 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 186 places, 231 transitions, 3919 flow. Second operand has 51 states, 51 states have (on average 7.745098039215686) internal successors, (395), 51 states have internal predecessors, (395), 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) [2024-11-20 09:46:17,906 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 09:46:17,906 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 28 [2024-11-20 09:46:17,906 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 09:46:24,038 INFO L124 PetriNetUnfolderBase]: 14785/25407 cut-off events. [2024-11-20 09:46:24,038 INFO L125 PetriNetUnfolderBase]: For 112802/112802 co-relation queries the response was YES. [2024-11-20 09:46:24,187 INFO L83 FinitePrefix]: Finished finitePrefix Result has 79852 conditions, 25407 events. 14785/25407 cut-off events. For 112802/112802 co-relation queries the response was YES. Maximal size of possible extension queue 628. Compared 189586 event pairs, 7069 based on Foata normal form. 1/21453 useless extension candidates. Maximal degree in co-relation 79781. Up to 21995 conditions per place. [2024-11-20 09:46:24,225 INFO L140 encePairwiseOnDemand]: 22/28 looper letters, 289 selfloop transitions, 27 changer transitions 129/448 dead transitions. [2024-11-20 09:46:24,225 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 195 places, 448 transitions, 5431 flow [2024-11-20 09:46:24,225 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2024-11-20 09:46:24,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2024-11-20 09:46:24,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 391 transitions. [2024-11-20 09:46:24,227 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5370879120879121 [2024-11-20 09:46:24,227 INFO L175 Difference]: Start difference. First operand has 186 places, 231 transitions, 3919 flow. Second operand 26 states and 391 transitions. [2024-11-20 09:46:24,227 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 195 places, 448 transitions, 5431 flow [2024-11-20 09:46:24,792 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 159 places, 448 transitions, 5046 flow, removed 158 selfloop flow, removed 36 redundant places. [2024-11-20 09:46:24,797 INFO L231 Difference]: Finished difference. Result has 160 places, 225 transitions, 3537 flow [2024-11-20 09:46:24,797 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=3572, PETRI_DIFFERENCE_MINUEND_PLACES=134, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=231, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=204, PETRI_DIFFERENCE_SUBTRAHEND_STATES=26, PETRI_FLOW=3537, PETRI_PLACES=160, PETRI_TRANSITIONS=225} [2024-11-20 09:46:24,797 INFO L277 CegarLoopForPetriNet]: 27 programPoint places, 133 predicate places. [2024-11-20 09:46:24,797 INFO L471 AbstractCegarLoop]: Abstraction has has 160 places, 225 transitions, 3537 flow [2024-11-20 09:46:24,798 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 51 states have (on average 7.745098039215686) internal successors, (395), 51 states have internal predecessors, (395), 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) [2024-11-20 09:46:24,798 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 09:46:24,798 INFO L204 CegarLoopForPetriNet]: trace histogram [6, 6, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-20 09:46:24,806 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2024-11-20 09:46:24,998 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 09:46:24,999 INFO L396 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-20 09:46:24,999 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 09:46:24,999 INFO L85 PathProgramCache]: Analyzing trace with hash -1710294903, now seen corresponding path program 17 times [2024-11-20 09:46:24,999 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 09:46:24,999 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [400414666] [2024-11-20 09:46:24,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 09:46:24,999 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 09:46:25,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 09:46:25,981 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 26 proven. 69 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 09:46:25,981 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 09:46:25,982 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [400414666] [2024-11-20 09:46:25,982 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [400414666] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-20 09:46:25,982 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1220598718] [2024-11-20 09:46:25,982 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-20 09:46:25,982 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 09:46:25,983 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-20 09:46:25,985 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-20 09:46:25,987 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2024-11-20 09:46:26,104 INFO L227 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2024-11-20 09:46:26,104 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-20 09:46:26,105 INFO L255 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 26 conjuncts are in the unsatisfiable core [2024-11-20 09:46:26,107 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-20 09:46:26,308 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 0 proven. 79 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2024-11-20 09:46:26,308 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-20 09:46:26,350 INFO L349 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2024-11-20 09:46:26,350 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 25 treesize of output 13 [2024-11-20 09:46:26,397 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 0 proven. 79 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2024-11-20 09:46:26,397 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1220598718] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-20 09:46:26,398 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-20 09:46:26,398 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 11, 11] total 27 [2024-11-20 09:46:26,398 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2144437499] [2024-11-20 09:46:26,398 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-20 09:46:26,399 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2024-11-20 09:46:26,399 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 09:46:26,399 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2024-11-20 09:46:26,400 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=674, Unknown=0, NotChecked=0, Total=756 [2024-11-20 09:46:26,400 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 28 [2024-11-20 09:46:26,400 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 160 places, 225 transitions, 3537 flow. Second operand has 28 states, 28 states have (on average 8.25) internal successors, (231), 28 states have internal predecessors, (231), 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) [2024-11-20 09:46:26,400 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 09:46:26,400 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 28 [2024-11-20 09:46:26,400 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand