./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/unroll-cond-3.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/unroll-cond-3.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 9fb4c28a8a216c266c6ae14d377c8e26c68bb16bf7c2fe2809f039d12d6c4b55 --- Real Ultimate output --- This is Ultimate 0.2.5-wip.dd.update-z3-fca748b-m [2024-11-20 09:46:46,387 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-20 09:46:46,437 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-11-20 09:46:46,441 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-20 09:46:46,441 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-20 09:46:46,467 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-20 09:46:46,468 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-20 09:46:46,468 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-20 09:46:46,468 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-20 09:46:46,469 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-20 09:46:46,469 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-20 09:46:46,469 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-20 09:46:46,470 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-20 09:46:46,470 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-20 09:46:46,470 INFO L153 SettingsManager]: * Use SBE=true [2024-11-20 09:46:46,471 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-20 09:46:46,472 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-11-20 09:46:46,474 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-20 09:46:46,474 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-20 09:46:46,475 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-20 09:46:46,475 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-20 09:46:46,476 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-11-20 09:46:46,476 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-20 09:46:46,476 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-11-20 09:46:46,476 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-20 09:46:46,476 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-20 09:46:46,476 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-11-20 09:46:46,477 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-20 09:46:46,477 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-20 09:46:46,477 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-20 09:46:46,477 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-20 09:46:46,477 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-20 09:46:46,477 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-20 09:46:46,478 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-20 09:46:46,478 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-20 09:46:46,478 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-11-20 09:46:46,478 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-20 09:46:46,478 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-20 09:46:46,478 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-20 09:46:46,478 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-20 09:46:46,479 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-20 09:46:46,479 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-20 09:46:46,480 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 9fb4c28a8a216c266c6ae14d377c8e26c68bb16bf7c2fe2809f039d12d6c4b55 [2024-11-20 09:46:46,693 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-20 09:46:46,717 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-20 09:46:46,720 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-20 09:46:46,721 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-20 09:46:46,721 INFO L274 PluginConnector]: CDTParser initialized [2024-11-20 09:46:46,722 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/unroll-cond-3.wvr.c [2024-11-20 09:46:48,030 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-20 09:46:48,189 INFO L384 CDTParser]: Found 1 translation units. [2024-11-20 09:46:48,190 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/unroll-cond-3.wvr.c [2024-11-20 09:46:48,196 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a2b8aa3d3/c9cdbe5c9aec449e88dadaaefeb0eb21/FLAG8e5e644be [2024-11-20 09:46:48,593 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a2b8aa3d3/c9cdbe5c9aec449e88dadaaefeb0eb21 [2024-11-20 09:46:48,595 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-20 09:46:48,596 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-20 09:46:48,599 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-20 09:46:48,599 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-20 09:46:48,604 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-20 09:46:48,604 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 09:46:48" (1/1) ... [2024-11-20 09:46:48,605 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2ba4a03c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:46:48, skipping insertion in model container [2024-11-20 09:46:48,605 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 09:46:48" (1/1) ... [2024-11-20 09:46:48,628 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-20 09:46:48,808 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/unroll-cond-3.wvr.c[2667,2680] [2024-11-20 09:46:48,816 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-20 09:46:48,823 INFO L200 MainTranslator]: Completed pre-run [2024-11-20 09:46:48,845 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/unroll-cond-3.wvr.c[2667,2680] [2024-11-20 09:46:48,848 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-20 09:46:48,863 INFO L204 MainTranslator]: Completed translation [2024-11-20 09:46:48,863 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:46:48 WrapperNode [2024-11-20 09:46:48,863 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-20 09:46:48,864 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-20 09:46:48,864 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-20 09:46:48,865 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-20 09:46:48,870 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:46:48" (1/1) ... [2024-11-20 09:46:48,876 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:46:48" (1/1) ... [2024-11-20 09:46:48,896 INFO L138 Inliner]: procedures = 23, calls = 27, calls flagged for inlining = 13, calls inlined = 13, statements flattened = 155 [2024-11-20 09:46:48,897 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-20 09:46:48,897 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-20 09:46:48,897 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-20 09:46:48,897 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-20 09:46:48,906 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:46:48" (1/1) ... [2024-11-20 09:46:48,907 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:46:48" (1/1) ... [2024-11-20 09:46:48,909 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:46:48" (1/1) ... [2024-11-20 09:46:48,928 INFO L175 MemorySlicer]: Split 9 memory accesses to 2 slices as follows [2, 7]. 78 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0]. The 1 writes are split as follows [0, 1]. [2024-11-20 09:46:48,929 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:46:48" (1/1) ... [2024-11-20 09:46:48,929 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:46:48" (1/1) ... [2024-11-20 09:46:48,934 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:46:48" (1/1) ... [2024-11-20 09:46:48,940 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:46:48" (1/1) ... [2024-11-20 09:46:48,941 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:46:48" (1/1) ... [2024-11-20 09:46:48,945 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:46:48" (1/1) ... [2024-11-20 09:46:48,950 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-20 09:46:48,951 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-20 09:46:48,951 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-20 09:46:48,951 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-20 09:46:48,952 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:46:48" (1/1) ... [2024-11-20 09:46:48,956 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-20 09:46:48,968 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-20 09:46:48,989 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 09:46:48,993 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 09:46:49,033 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-20 09:46:49,033 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2024-11-20 09:46:49,033 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2024-11-20 09:46:49,034 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2024-11-20 09:46:49,034 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2024-11-20 09:46:49,034 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-11-20 09:46:49,034 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-11-20 09:46:49,034 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-11-20 09:46:49,036 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-11-20 09:46:49,036 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-11-20 09:46:49,036 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-20 09:46:49,036 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-20 09:46:49,036 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-11-20 09:46:49,036 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-11-20 09:46:49,038 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 09:46:49,156 INFO L238 CfgBuilder]: Building ICFG [2024-11-20 09:46:49,158 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-20 09:46:49,401 INFO L283 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2024-11-20 09:46:49,401 INFO L287 CfgBuilder]: Performing block encoding [2024-11-20 09:46:49,668 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-20 09:46:49,669 INFO L316 CfgBuilder]: Removed 3 assume(true) statements. [2024-11-20 09:46:49,670 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 09:46:49 BoogieIcfgContainer [2024-11-20 09:46:49,670 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-20 09:46:49,671 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-20 09:46:49,671 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-20 09:46:49,676 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-20 09:46:49,676 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.11 09:46:48" (1/3) ... [2024-11-20 09:46:49,677 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@345cae1e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 09:46:49, skipping insertion in model container [2024-11-20 09:46:49,677 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:46:48" (2/3) ... [2024-11-20 09:46:49,678 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@345cae1e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 09:46:49, skipping insertion in model container [2024-11-20 09:46:49,679 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 09:46:49" (3/3) ... [2024-11-20 09:46:49,680 INFO L112 eAbstractionObserver]: Analyzing ICFG unroll-cond-3.wvr.c [2024-11-20 09:46:49,696 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-20 09:46:49,696 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-11-20 09:46:49,696 INFO L489 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-11-20 09:46:49,743 INFO L143 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2024-11-20 09:46:49,773 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 24 places, 20 transitions, 54 flow [2024-11-20 09:46:49,798 INFO L124 PetriNetUnfolderBase]: 3/18 cut-off events. [2024-11-20 09:46:49,798 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-11-20 09:46:49,801 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27 conditions, 18 events. 3/18 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 12 event pairs, 0 based on Foata normal form. 0/14 useless extension candidates. Maximal degree in co-relation 11. Up to 2 conditions per place. [2024-11-20 09:46:49,801 INFO L82 GeneralOperation]: Start removeDead. Operand has 24 places, 20 transitions, 54 flow [2024-11-20 09:46:49,804 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 21 places, 17 transitions, 46 flow [2024-11-20 09:46:49,815 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-20 09:46:49,820 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;@7d7abc, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-20 09:46:49,821 INFO L334 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2024-11-20 09:46:49,830 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-11-20 09:46:49,830 INFO L124 PetriNetUnfolderBase]: 3/16 cut-off events. [2024-11-20 09:46:49,830 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-11-20 09:46:49,830 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 09:46:49,831 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-20 09:46:49,831 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 09:46:49,836 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 09:46:49,836 INFO L85 PathProgramCache]: Analyzing trace with hash 1958557296, now seen corresponding path program 1 times [2024-11-20 09:46:49,843 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 09:46:49,844 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [119170894] [2024-11-20 09:46:49,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 09:46:49,844 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 09:46:49,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 09:46:50,215 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 09:46:50,216 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 09:46:50,216 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [119170894] [2024-11-20 09:46:50,216 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [119170894] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-20 09:46:50,217 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-20 09:46:50,217 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-20 09:46:50,219 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [563203451] [2024-11-20 09:46:50,219 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-20 09:46:50,226 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-20 09:46:50,231 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 09:46:50,256 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-20 09:46:50,256 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-20 09:46:50,258 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 20 [2024-11-20 09:46:50,260 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 21 places, 17 transitions, 46 flow. Second operand has 3 states, 3 states have (on average 7.333333333333333) internal successors, (22), 3 states have internal predecessors, (22), 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 09:46:50,260 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 09:46:50,260 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 20 [2024-11-20 09:46:50,262 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 09:46:50,338 INFO L124 PetriNetUnfolderBase]: 38/71 cut-off events. [2024-11-20 09:46:50,338 INFO L125 PetriNetUnfolderBase]: For 8/8 co-relation queries the response was YES. [2024-11-20 09:46:50,339 INFO L83 FinitePrefix]: Finished finitePrefix Result has 157 conditions, 71 events. 38/71 cut-off events. For 8/8 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 121 event pairs, 22 based on Foata normal form. 0/55 useless extension candidates. Maximal degree in co-relation 120. Up to 70 conditions per place. [2024-11-20 09:46:50,343 INFO L140 encePairwiseOnDemand]: 17/20 looper letters, 15 selfloop transitions, 2 changer transitions 0/18 dead transitions. [2024-11-20 09:46:50,343 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 23 places, 18 transitions, 82 flow [2024-11-20 09:46:50,344 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-20 09:46:50,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-20 09:46:50,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 27 transitions. [2024-11-20 09:46:50,355 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.45 [2024-11-20 09:46:50,357 INFO L175 Difference]: Start difference. First operand has 21 places, 17 transitions, 46 flow. Second operand 3 states and 27 transitions. [2024-11-20 09:46:50,358 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 23 places, 18 transitions, 82 flow [2024-11-20 09:46:50,361 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 19 places, 18 transitions, 74 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-11-20 09:46:50,364 INFO L231 Difference]: Finished difference. Result has 20 places, 18 transitions, 50 flow [2024-11-20 09:46:50,365 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=38, PETRI_DIFFERENCE_MINUEND_PLACES=17, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=17, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=15, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=50, PETRI_PLACES=20, PETRI_TRANSITIONS=18} [2024-11-20 09:46:50,370 INFO L277 CegarLoopForPetriNet]: 21 programPoint places, -1 predicate places. [2024-11-20 09:46:50,371 INFO L471 AbstractCegarLoop]: Abstraction has has 20 places, 18 transitions, 50 flow [2024-11-20 09:46:50,371 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 7.333333333333333) internal successors, (22), 3 states have internal predecessors, (22), 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 09:46:50,371 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 09:46:50,371 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-20 09:46:50,372 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-20 09:46:50,373 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 09:46:50,373 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 09:46:50,373 INFO L85 PathProgramCache]: Analyzing trace with hash -1419692673, now seen corresponding path program 1 times [2024-11-20 09:46:50,374 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 09:46:50,374 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1059006311] [2024-11-20 09:46:50,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 09:46:50,374 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 09:46:50,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 09:46:50,812 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-20 09:46:50,813 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 09:46:50,813 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1059006311] [2024-11-20 09:46:50,813 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1059006311] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-20 09:46:50,813 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-20 09:46:50,813 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-20 09:46:50,814 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [750112503] [2024-11-20 09:46:50,814 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-20 09:46:50,815 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-20 09:46:50,815 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 09:46:50,815 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-20 09:46:50,816 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-11-20 09:46:50,816 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 20 [2024-11-20 09:46:50,816 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 20 places, 18 transitions, 50 flow. Second operand has 6 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 09:46:50,816 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 09:46:50,816 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 20 [2024-11-20 09:46:50,817 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 09:46:51,008 INFO L124 PetriNetUnfolderBase]: 68/120 cut-off events. [2024-11-20 09:46:51,009 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-11-20 09:46:51,011 INFO L83 FinitePrefix]: Finished finitePrefix Result has 254 conditions, 120 events. 68/120 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 307 event pairs, 1 based on Foata normal form. 0/91 useless extension candidates. Maximal degree in co-relation 243. Up to 80 conditions per place. [2024-11-20 09:46:51,012 INFO L140 encePairwiseOnDemand]: 13/20 looper letters, 30 selfloop transitions, 12 changer transitions 0/43 dead transitions. [2024-11-20 09:46:51,013 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 25 places, 43 transitions, 189 flow [2024-11-20 09:46:51,013 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-20 09:46:51,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-20 09:46:51,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 60 transitions. [2024-11-20 09:46:51,015 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5 [2024-11-20 09:46:51,015 INFO L175 Difference]: Start difference. First operand has 20 places, 18 transitions, 50 flow. Second operand 6 states and 60 transitions. [2024-11-20 09:46:51,015 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 25 places, 43 transitions, 189 flow [2024-11-20 09:46:51,016 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 24 places, 43 transitions, 185 flow, removed 1 selfloop flow, removed 1 redundant places. [2024-11-20 09:46:51,017 INFO L231 Difference]: Finished difference. Result has 27 places, 29 transitions, 117 flow [2024-11-20 09:46:51,019 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=46, PETRI_DIFFERENCE_MINUEND_PLACES=19, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=18, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=11, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=117, PETRI_PLACES=27, PETRI_TRANSITIONS=29} [2024-11-20 09:46:51,020 INFO L277 CegarLoopForPetriNet]: 21 programPoint places, 6 predicate places. [2024-11-20 09:46:51,020 INFO L471 AbstractCegarLoop]: Abstraction has has 27 places, 29 transitions, 117 flow [2024-11-20 09:46:51,021 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 09:46:51,021 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 09:46:51,021 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-20 09:46:51,021 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-20 09:46:51,022 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 09:46:51,022 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 09:46:51,023 INFO L85 PathProgramCache]: Analyzing trace with hash 760488887, now seen corresponding path program 2 times [2024-11-20 09:46:51,023 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 09:46:51,023 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1191648356] [2024-11-20 09:46:51,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 09:46:51,024 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 09:46:51,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 09:46:51,299 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-20 09:46:51,299 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 09:46:51,300 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1191648356] [2024-11-20 09:46:51,300 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1191648356] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-20 09:46:51,300 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-20 09:46:51,300 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-20 09:46:51,300 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1161480997] [2024-11-20 09:46:51,300 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-20 09:46:51,301 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-20 09:46:51,301 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 09:46:51,301 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-20 09:46:51,302 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2024-11-20 09:46:51,302 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 20 [2024-11-20 09:46:51,302 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 27 places, 29 transitions, 117 flow. Second operand has 6 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 09:46:51,302 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 09:46:51,302 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 20 [2024-11-20 09:46:51,302 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 09:46:51,443 INFO L124 PetriNetUnfolderBase]: 77/134 cut-off events. [2024-11-20 09:46:51,444 INFO L125 PetriNetUnfolderBase]: For 43/43 co-relation queries the response was YES. [2024-11-20 09:46:51,444 INFO L83 FinitePrefix]: Finished finitePrefix Result has 422 conditions, 134 events. 77/134 cut-off events. For 43/43 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 338 event pairs, 6 based on Foata normal form. 0/109 useless extension candidates. Maximal degree in co-relation 403. Up to 89 conditions per place. [2024-11-20 09:46:51,446 INFO L140 encePairwiseOnDemand]: 13/20 looper letters, 28 selfloop transitions, 18 changer transitions 0/47 dead transitions. [2024-11-20 09:46:51,446 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 32 places, 47 transitions, 278 flow [2024-11-20 09:46:51,446 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-20 09:46:51,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-20 09:46:51,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 58 transitions. [2024-11-20 09:46:51,450 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.48333333333333334 [2024-11-20 09:46:51,450 INFO L175 Difference]: Start difference. First operand has 27 places, 29 transitions, 117 flow. Second operand 6 states and 58 transitions. [2024-11-20 09:46:51,450 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 32 places, 47 transitions, 278 flow [2024-11-20 09:46:51,452 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 32 places, 47 transitions, 270 flow, removed 4 selfloop flow, removed 0 redundant places. [2024-11-20 09:46:51,453 INFO L231 Difference]: Finished difference. Result has 35 places, 37 transitions, 212 flow [2024-11-20 09:46:51,454 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=113, PETRI_DIFFERENCE_MINUEND_PLACES=27, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=29, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=16, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=212, PETRI_PLACES=35, PETRI_TRANSITIONS=37} [2024-11-20 09:46:51,455 INFO L277 CegarLoopForPetriNet]: 21 programPoint places, 14 predicate places. [2024-11-20 09:46:51,455 INFO L471 AbstractCegarLoop]: Abstraction has has 35 places, 37 transitions, 212 flow [2024-11-20 09:46:51,455 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 09:46:51,455 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 09:46:51,455 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-20 09:46:51,456 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-11-20 09:46:51,456 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 09:46:51,457 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 09:46:51,457 INFO L85 PathProgramCache]: Analyzing trace with hash -1279489767, now seen corresponding path program 3 times [2024-11-20 09:46:51,457 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 09:46:51,457 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [595552331] [2024-11-20 09:46:51,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 09:46:51,458 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 09:46:51,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 09:46:51,666 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-20 09:46:51,667 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 09:46:51,667 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [595552331] [2024-11-20 09:46:51,667 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [595552331] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-20 09:46:51,667 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-20 09:46:51,668 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-20 09:46:51,668 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1252855161] [2024-11-20 09:46:51,668 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-20 09:46:51,668 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-20 09:46:51,668 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 09:46:51,669 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-20 09:46:51,669 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2024-11-20 09:46:51,669 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 20 [2024-11-20 09:46:51,669 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 35 places, 37 transitions, 212 flow. Second operand has 6 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 09:46:51,670 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 09:46:51,670 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 20 [2024-11-20 09:46:51,670 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 09:46:51,783 INFO L124 PetriNetUnfolderBase]: 78/147 cut-off events. [2024-11-20 09:46:51,783 INFO L125 PetriNetUnfolderBase]: For 101/101 co-relation queries the response was YES. [2024-11-20 09:46:51,784 INFO L83 FinitePrefix]: Finished finitePrefix Result has 543 conditions, 147 events. 78/147 cut-off events. For 101/101 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 405 event pairs, 1 based on Foata normal form. 1/121 useless extension candidates. Maximal degree in co-relation 519. Up to 86 conditions per place. [2024-11-20 09:46:51,786 INFO L140 encePairwiseOnDemand]: 12/20 looper letters, 33 selfloop transitions, 19 changer transitions 2/55 dead transitions. [2024-11-20 09:46:51,786 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 40 places, 55 transitions, 379 flow [2024-11-20 09:46:51,787 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-20 09:46:51,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-20 09:46:51,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 64 transitions. [2024-11-20 09:46:51,788 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5333333333333333 [2024-11-20 09:46:51,788 INFO L175 Difference]: Start difference. First operand has 35 places, 37 transitions, 212 flow. Second operand 6 states and 64 transitions. [2024-11-20 09:46:51,788 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 40 places, 55 transitions, 379 flow [2024-11-20 09:46:51,790 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 39 places, 55 transitions, 355 flow, removed 5 selfloop flow, removed 1 redundant places. [2024-11-20 09:46:51,791 INFO L231 Difference]: Finished difference. Result has 41 places, 39 transitions, 258 flow [2024-11-20 09:46:51,791 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=188, PETRI_DIFFERENCE_MINUEND_PLACES=34, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=18, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=258, PETRI_PLACES=41, PETRI_TRANSITIONS=39} [2024-11-20 09:46:51,792 INFO L277 CegarLoopForPetriNet]: 21 programPoint places, 20 predicate places. [2024-11-20 09:46:51,792 INFO L471 AbstractCegarLoop]: Abstraction has has 41 places, 39 transitions, 258 flow [2024-11-20 09:46:51,792 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 09:46:51,792 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 09:46:51,792 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-20 09:46:51,792 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-11-20 09:46:51,793 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 09:46:51,793 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 09:46:51,793 INFO L85 PathProgramCache]: Analyzing trace with hash -835769155, now seen corresponding path program 4 times [2024-11-20 09:46:51,793 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 09:46:51,793 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1129517916] [2024-11-20 09:46:51,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 09:46:51,793 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 09:46:51,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 09:46:52,042 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-20 09:46:52,042 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 09:46:52,042 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1129517916] [2024-11-20 09:46:52,042 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1129517916] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-20 09:46:52,043 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-20 09:46:52,043 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-20 09:46:52,043 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [789948814] [2024-11-20 09:46:52,043 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-20 09:46:52,043 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-20 09:46:52,044 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 09:46:52,044 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-20 09:46:52,044 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-11-20 09:46:52,044 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 20 [2024-11-20 09:46:52,044 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 39 transitions, 258 flow. Second operand has 6 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 09:46:52,045 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 09:46:52,045 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 20 [2024-11-20 09:46:52,045 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 09:46:52,158 INFO L124 PetriNetUnfolderBase]: 75/134 cut-off events. [2024-11-20 09:46:52,158 INFO L125 PetriNetUnfolderBase]: For 208/208 co-relation queries the response was YES. [2024-11-20 09:46:52,159 INFO L83 FinitePrefix]: Finished finitePrefix Result has 547 conditions, 134 events. 75/134 cut-off events. For 208/208 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 353 event pairs, 1 based on Foata normal form. 3/117 useless extension candidates. Maximal degree in co-relation 520. Up to 89 conditions per place. [2024-11-20 09:46:52,160 INFO L140 encePairwiseOnDemand]: 13/20 looper letters, 31 selfloop transitions, 18 changer transitions 0/50 dead transitions. [2024-11-20 09:46:52,160 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 50 transitions, 381 flow [2024-11-20 09:46:52,160 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-20 09:46:52,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-20 09:46:52,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 60 transitions. [2024-11-20 09:46:52,161 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5 [2024-11-20 09:46:52,161 INFO L175 Difference]: Start difference. First operand has 41 places, 39 transitions, 258 flow. Second operand 6 states and 60 transitions. [2024-11-20 09:46:52,162 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 50 transitions, 381 flow [2024-11-20 09:46:52,164 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 50 transitions, 357 flow, removed 3 selfloop flow, removed 2 redundant places. [2024-11-20 09:46:52,165 INFO L231 Difference]: Finished difference. Result has 45 places, 39 transitions, 277 flow [2024-11-20 09:46:52,165 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=224, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=20, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=277, PETRI_PLACES=45, PETRI_TRANSITIONS=39} [2024-11-20 09:46:52,165 INFO L277 CegarLoopForPetriNet]: 21 programPoint places, 24 predicate places. [2024-11-20 09:46:52,165 INFO L471 AbstractCegarLoop]: Abstraction has has 45 places, 39 transitions, 277 flow [2024-11-20 09:46:52,166 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 09:46:52,166 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 09:46:52,166 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-20 09:46:52,166 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-11-20 09:46:52,166 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 09:46:52,167 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 09:46:52,167 INFO L85 PathProgramCache]: Analyzing trace with hash 839137127, now seen corresponding path program 5 times [2024-11-20 09:46:52,167 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 09:46:52,167 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [824896976] [2024-11-20 09:46:52,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 09:46:52,167 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 09:46:52,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 09:46:52,336 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-20 09:46:52,337 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 09:46:52,337 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [824896976] [2024-11-20 09:46:52,337 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [824896976] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-20 09:46:52,337 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-20 09:46:52,337 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-20 09:46:52,337 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [677770143] [2024-11-20 09:46:52,338 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-20 09:46:52,338 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-20 09:46:52,338 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 09:46:52,338 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-20 09:46:52,339 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-20 09:46:52,339 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 20 [2024-11-20 09:46:52,339 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 39 transitions, 277 flow. Second operand has 5 states, 5 states have (on average 5.8) internal successors, (29), 5 states have internal predecessors, (29), 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 09:46:52,339 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 09:46:52,339 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 20 [2024-11-20 09:46:52,339 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 09:46:52,438 INFO L124 PetriNetUnfolderBase]: 88/154 cut-off events. [2024-11-20 09:46:52,438 INFO L125 PetriNetUnfolderBase]: For 283/283 co-relation queries the response was YES. [2024-11-20 09:46:52,440 INFO L83 FinitePrefix]: Finished finitePrefix Result has 633 conditions, 154 events. 88/154 cut-off events. For 283/283 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 416 event pairs, 20 based on Foata normal form. 0/127 useless extension candidates. Maximal degree in co-relation 605. Up to 113 conditions per place. [2024-11-20 09:46:52,440 INFO L140 encePairwiseOnDemand]: 14/20 looper letters, 30 selfloop transitions, 18 changer transitions 0/49 dead transitions. [2024-11-20 09:46:52,441 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 49 transitions, 411 flow [2024-11-20 09:46:52,441 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-20 09:46:52,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-20 09:46:52,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 47 transitions. [2024-11-20 09:46:52,444 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.47 [2024-11-20 09:46:52,445 INFO L175 Difference]: Start difference. First operand has 45 places, 39 transitions, 277 flow. Second operand 5 states and 47 transitions. [2024-11-20 09:46:52,445 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 49 places, 49 transitions, 411 flow [2024-11-20 09:46:52,448 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 49 transitions, 375 flow, removed 1 selfloop flow, removed 4 redundant places. [2024-11-20 09:46:52,449 INFO L231 Difference]: Finished difference. Result has 47 places, 42 transitions, 315 flow [2024-11-20 09:46:52,449 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=241, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=315, PETRI_PLACES=47, PETRI_TRANSITIONS=42} [2024-11-20 09:46:52,450 INFO L277 CegarLoopForPetriNet]: 21 programPoint places, 26 predicate places. [2024-11-20 09:46:52,450 INFO L471 AbstractCegarLoop]: Abstraction has has 47 places, 42 transitions, 315 flow [2024-11-20 09:46:52,450 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.8) internal successors, (29), 5 states have internal predecessors, (29), 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 09:46:52,450 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 09:46:52,451 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-20 09:46:52,451 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-11-20 09:46:52,451 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 09:46:52,452 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 09:46:52,452 INFO L85 PathProgramCache]: Analyzing trace with hash -945806931, now seen corresponding path program 6 times [2024-11-20 09:46:52,452 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 09:46:52,452 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [10937728] [2024-11-20 09:46:52,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 09:46:52,453 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 09:46:52,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 09:46:52,659 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-20 09:46:52,659 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 09:46:52,659 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [10937728] [2024-11-20 09:46:52,660 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [10937728] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-20 09:46:52,660 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-20 09:46:52,662 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-20 09:46:52,662 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [112121789] [2024-11-20 09:46:52,663 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-20 09:46:52,663 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-20 09:46:52,663 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 09:46:52,663 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-20 09:46:52,664 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-20 09:46:52,664 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 20 [2024-11-20 09:46:52,664 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 42 transitions, 315 flow. Second operand has 5 states, 5 states have (on average 5.8) internal successors, (29), 5 states have internal predecessors, (29), 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 09:46:52,664 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 09:46:52,664 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 20 [2024-11-20 09:46:52,664 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 09:46:52,801 INFO L124 PetriNetUnfolderBase]: 92/170 cut-off events. [2024-11-20 09:46:52,802 INFO L125 PetriNetUnfolderBase]: For 383/383 co-relation queries the response was YES. [2024-11-20 09:46:52,803 INFO L83 FinitePrefix]: Finished finitePrefix Result has 754 conditions, 170 events. 92/170 cut-off events. For 383/383 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 497 event pairs, 20 based on Foata normal form. 0/145 useless extension candidates. Maximal degree in co-relation 725. Up to 99 conditions per place. [2024-11-20 09:46:52,804 INFO L140 encePairwiseOnDemand]: 14/20 looper letters, 37 selfloop transitions, 17 changer transitions 0/55 dead transitions. [2024-11-20 09:46:52,804 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 51 places, 55 transitions, 484 flow [2024-11-20 09:46:52,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-20 09:46:52,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-20 09:46:52,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 48 transitions. [2024-11-20 09:46:52,806 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.48 [2024-11-20 09:46:52,806 INFO L175 Difference]: Start difference. First operand has 47 places, 42 transitions, 315 flow. Second operand 5 states and 48 transitions. [2024-11-20 09:46:52,806 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 51 places, 55 transitions, 484 flow [2024-11-20 09:46:52,809 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 55 transitions, 456 flow, removed 4 selfloop flow, removed 2 redundant places. [2024-11-20 09:46:52,811 INFO L231 Difference]: Finished difference. Result has 51 places, 44 transitions, 347 flow [2024-11-20 09:46:52,811 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=287, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=347, PETRI_PLACES=51, PETRI_TRANSITIONS=44} [2024-11-20 09:46:52,812 INFO L277 CegarLoopForPetriNet]: 21 programPoint places, 30 predicate places. [2024-11-20 09:46:52,813 INFO L471 AbstractCegarLoop]: Abstraction has has 51 places, 44 transitions, 347 flow [2024-11-20 09:46:52,813 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.8) internal successors, (29), 5 states have internal predecessors, (29), 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 09:46:52,813 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 09:46:52,813 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-20 09:46:52,813 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-11-20 09:46:52,814 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 09:46:52,814 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 09:46:52,814 INFO L85 PathProgramCache]: Analyzing trace with hash -804331554, now seen corresponding path program 1 times [2024-11-20 09:46:52,814 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 09:46:52,815 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [586228407] [2024-11-20 09:46:52,815 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 09:46:52,815 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 09:46:52,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 09:46:53,009 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-20 09:46:53,010 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 09:46:53,010 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [586228407] [2024-11-20 09:46:53,010 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [586228407] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-20 09:46:53,010 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [432806317] [2024-11-20 09:46:53,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 09:46:53,011 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 09:46:53,011 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-20 09:46:53,017 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 09:46:53,022 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 09:46:53,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 09:46:53,104 INFO L255 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 31 conjuncts are in the unsatisfiable core [2024-11-20 09:46:53,111 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-20 09:46:53,185 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-11-20 09:46:53,480 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 15 treesize of output 7 [2024-11-20 09:46:53,492 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 09:46:53,492 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-20 09:46:54,295 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 33 treesize of output 29 [2024-11-20 09:46:54,313 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2024-11-20 09:46:54,313 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 62 treesize of output 41 [2024-11-20 09:46:54,351 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 09:46:54,352 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [432806317] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-20 09:46:54,352 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-20 09:46:54,352 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 9, 9] total 21 [2024-11-20 09:46:54,352 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1964308386] [2024-11-20 09:46:54,353 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-20 09:46:54,353 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-11-20 09:46:54,353 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 09:46:54,354 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-11-20 09:46:54,354 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=342, Unknown=0, NotChecked=0, Total=420 [2024-11-20 09:46:54,354 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 20 [2024-11-20 09:46:54,355 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 44 transitions, 347 flow. Second operand has 21 states, 21 states have (on average 5.0476190476190474) internal successors, (106), 21 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 09:46:54,355 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 09:46:54,355 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 20 [2024-11-20 09:46:54,355 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 09:46:56,378 INFO L124 PetriNetUnfolderBase]: 189/373 cut-off events. [2024-11-20 09:46:56,378 INFO L125 PetriNetUnfolderBase]: For 837/837 co-relation queries the response was YES. [2024-11-20 09:46:56,380 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1611 conditions, 373 events. 189/373 cut-off events. For 837/837 co-relation queries the response was YES. Maximal size of possible extension queue 34. Compared 1507 event pairs, 3 based on Foata normal form. 4/315 useless extension candidates. Maximal degree in co-relation 1580. Up to 117 conditions per place. [2024-11-20 09:46:56,382 INFO L140 encePairwiseOnDemand]: 10/20 looper letters, 79 selfloop transitions, 45 changer transitions 3/128 dead transitions. [2024-11-20 09:46:56,382 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 128 transitions, 1031 flow [2024-11-20 09:46:56,384 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2024-11-20 09:46:56,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2024-11-20 09:46:56,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 169 transitions. [2024-11-20 09:46:56,387 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.44473684210526315 [2024-11-20 09:46:56,387 INFO L175 Difference]: Start difference. First operand has 51 places, 44 transitions, 347 flow. Second operand 19 states and 169 transitions. [2024-11-20 09:46:56,387 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 128 transitions, 1031 flow [2024-11-20 09:46:56,389 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 128 transitions, 975 flow, removed 5 selfloop flow, removed 2 redundant places. [2024-11-20 09:46:56,391 INFO L231 Difference]: Finished difference. Result has 74 places, 68 transitions, 652 flow [2024-11-20 09:46:56,392 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=311, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=17, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=652, PETRI_PLACES=74, PETRI_TRANSITIONS=68} [2024-11-20 09:46:56,392 INFO L277 CegarLoopForPetriNet]: 21 programPoint places, 53 predicate places. [2024-11-20 09:46:56,392 INFO L471 AbstractCegarLoop]: Abstraction has has 74 places, 68 transitions, 652 flow [2024-11-20 09:46:56,393 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 5.0476190476190474) internal successors, (106), 21 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 09:46:56,393 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 09:46:56,393 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-20 09:46:56,401 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2024-11-20 09:46:56,597 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 09:46:56,598 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 09:46:56,599 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 09:46:56,599 INFO L85 PathProgramCache]: Analyzing trace with hash 1333235710, now seen corresponding path program 2 times [2024-11-20 09:46:56,599 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 09:46:56,599 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1004195809] [2024-11-20 09:46:56,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 09:46:56,600 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 09:46:56,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 09:46:56,782 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-20 09:46:56,783 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 09:46:56,783 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1004195809] [2024-11-20 09:46:56,783 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1004195809] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-20 09:46:56,783 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1573291604] [2024-11-20 09:46:56,783 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-20 09:46:56,783 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 09:46:56,783 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-20 09:46:56,787 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 09:46:56,789 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 09:46:56,852 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-20 09:46:56,853 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-20 09:46:56,854 INFO L255 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 31 conjuncts are in the unsatisfiable core [2024-11-20 09:46:56,860 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-20 09:46:56,894 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 15 treesize of output 1 [2024-11-20 09:46:57,106 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 15 treesize of output 7 [2024-11-20 09:46:57,124 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 09:46:57,125 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-20 09:46:57,847 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 33 treesize of output 29 [2024-11-20 09:46:57,855 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2024-11-20 09:46:57,855 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 62 treesize of output 41 [2024-11-20 09:46:57,884 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 09:46:57,884 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1573291604] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-20 09:46:57,884 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-20 09:46:57,885 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 9, 9] total 21 [2024-11-20 09:46:57,885 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2031836424] [2024-11-20 09:46:57,885 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-20 09:46:57,885 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-11-20 09:46:57,885 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 09:46:57,886 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-11-20 09:46:57,886 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=340, Unknown=0, NotChecked=0, Total=420 [2024-11-20 09:46:57,886 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 20 [2024-11-20 09:46:57,886 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 68 transitions, 652 flow. Second operand has 21 states, 21 states have (on average 5.0476190476190474) internal successors, (106), 21 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 09:46:57,886 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 09:46:57,886 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 20 [2024-11-20 09:46:57,886 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 09:46:59,264 INFO L124 PetriNetUnfolderBase]: 221/456 cut-off events. [2024-11-20 09:46:59,264 INFO L125 PetriNetUnfolderBase]: For 1850/1850 co-relation queries the response was YES. [2024-11-20 09:46:59,266 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2312 conditions, 456 events. 221/456 cut-off events. For 1850/1850 co-relation queries the response was YES. Maximal size of possible extension queue 42. Compared 2066 event pairs, 5 based on Foata normal form. 4/433 useless extension candidates. Maximal degree in co-relation 2271. Up to 149 conditions per place. [2024-11-20 09:46:59,268 INFO L140 encePairwiseOnDemand]: 10/20 looper letters, 86 selfloop transitions, 57 changer transitions 10/154 dead transitions. [2024-11-20 09:46:59,268 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 95 places, 154 transitions, 1447 flow [2024-11-20 09:46:59,272 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2024-11-20 09:46:59,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2024-11-20 09:46:59,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 194 transitions. [2024-11-20 09:46:59,274 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4409090909090909 [2024-11-20 09:46:59,274 INFO L175 Difference]: Start difference. First operand has 74 places, 68 transitions, 652 flow. Second operand 22 states and 194 transitions. [2024-11-20 09:46:59,274 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 95 places, 154 transitions, 1447 flow [2024-11-20 09:46:59,280 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 91 places, 154 transitions, 1273 flow, removed 75 selfloop flow, removed 4 redundant places. [2024-11-20 09:46:59,282 INFO L231 Difference]: Finished difference. Result has 96 places, 84 transitions, 816 flow [2024-11-20 09:46:59,283 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=528, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=68, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=816, PETRI_PLACES=96, PETRI_TRANSITIONS=84} [2024-11-20 09:46:59,283 INFO L277 CegarLoopForPetriNet]: 21 programPoint places, 75 predicate places. [2024-11-20 09:46:59,284 INFO L471 AbstractCegarLoop]: Abstraction has has 96 places, 84 transitions, 816 flow [2024-11-20 09:46:59,284 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 5.0476190476190474) internal successors, (106), 21 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 09:46:59,284 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 09:46:59,284 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-20 09:46:59,294 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 09:46:59,488 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2024-11-20 09:46:59,489 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 09:46:59,489 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 09:46:59,489 INFO L85 PathProgramCache]: Analyzing trace with hash 1411883950, now seen corresponding path program 3 times [2024-11-20 09:46:59,490 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 09:46:59,490 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [657596532] [2024-11-20 09:46:59,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 09:46:59,490 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 09:46:59,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 09:46:59,631 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-20 09:46:59,631 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 09:46:59,631 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [657596532] [2024-11-20 09:46:59,631 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [657596532] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-20 09:46:59,632 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1921167378] [2024-11-20 09:46:59,632 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-20 09:46:59,632 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 09:46:59,632 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-20 09:46:59,634 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 09:46:59,635 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 09:46:59,687 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-11-20 09:46:59,688 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-20 09:46:59,689 INFO L255 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 31 conjuncts are in the unsatisfiable core [2024-11-20 09:46:59,691 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-20 09:46:59,720 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-11-20 09:46:59,901 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-20 09:46:59,902 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 115 treesize of output 109 [2024-11-20 09:47:00,063 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 09:47:00,063 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-20 09:47:00,555 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 33 treesize of output 29 [2024-11-20 09:47:00,561 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2024-11-20 09:47:00,562 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 62 treesize of output 41 [2024-11-20 09:47:00,581 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 09:47:00,581 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1921167378] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-20 09:47:00,581 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-20 09:47:00,581 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 9, 9] total 21 [2024-11-20 09:47:00,581 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1095940312] [2024-11-20 09:47:00,581 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-20 09:47:00,581 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-11-20 09:47:00,582 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 09:47:00,582 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-11-20 09:47:00,582 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=337, Unknown=0, NotChecked=0, Total=420 [2024-11-20 09:47:00,584 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 20 [2024-11-20 09:47:00,584 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 96 places, 84 transitions, 816 flow. Second operand has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 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 09:47:00,584 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 09:47:00,584 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 20 [2024-11-20 09:47:00,585 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 09:47:01,600 INFO L124 PetriNetUnfolderBase]: 216/441 cut-off events. [2024-11-20 09:47:01,600 INFO L125 PetriNetUnfolderBase]: For 2338/2338 co-relation queries the response was YES. [2024-11-20 09:47:01,602 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2291 conditions, 441 events. 216/441 cut-off events. For 2338/2338 co-relation queries the response was YES. Maximal size of possible extension queue 40. Compared 1941 event pairs, 5 based on Foata normal form. 2/426 useless extension candidates. Maximal degree in co-relation 2244. Up to 167 conditions per place. [2024-11-20 09:47:01,604 INFO L140 encePairwiseOnDemand]: 11/20 looper letters, 74 selfloop transitions, 52 changer transitions 6/133 dead transitions. [2024-11-20 09:47:01,605 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 110 places, 133 transitions, 1306 flow [2024-11-20 09:47:01,605 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-11-20 09:47:01,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2024-11-20 09:47:01,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 151 transitions. [2024-11-20 09:47:01,606 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4441176470588235 [2024-11-20 09:47:01,606 INFO L175 Difference]: Start difference. First operand has 96 places, 84 transitions, 816 flow. Second operand 17 states and 151 transitions. [2024-11-20 09:47:01,606 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 110 places, 133 transitions, 1306 flow [2024-11-20 09:47:01,614 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 103 places, 133 transitions, 1218 flow, removed 21 selfloop flow, removed 7 redundant places. [2024-11-20 09:47:01,616 INFO L231 Difference]: Finished difference. Result has 104 places, 83 transitions, 831 flow [2024-11-20 09:47:01,616 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=721, PETRI_DIFFERENCE_MINUEND_PLACES=87, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=83, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=52, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=831, PETRI_PLACES=104, PETRI_TRANSITIONS=83} [2024-11-20 09:47:01,617 INFO L277 CegarLoopForPetriNet]: 21 programPoint places, 83 predicate places. [2024-11-20 09:47:01,617 INFO L471 AbstractCegarLoop]: Abstraction has has 104 places, 83 transitions, 831 flow [2024-11-20 09:47:01,617 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 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 09:47:01,617 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 09:47:01,617 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-20 09:47:01,624 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 09:47:01,821 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 09:47:01,822 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 09:47:01,822 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 09:47:01,822 INFO L85 PathProgramCache]: Analyzing trace with hash -995429169, now seen corresponding path program 1 times [2024-11-20 09:47:01,822 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 09:47:01,822 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1524086860] [2024-11-20 09:47:01,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 09:47:01,823 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 09:47:01,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 09:47:01,922 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-20 09:47:01,922 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 09:47:01,922 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1524086860] [2024-11-20 09:47:01,922 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1524086860] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-20 09:47:01,923 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1788297363] [2024-11-20 09:47:01,923 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 09:47:01,923 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 09:47:01,923 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-20 09:47:01,926 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 09:47:01,927 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 09:47:01,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 09:47:01,989 INFO L255 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 34 conjuncts are in the unsatisfiable core [2024-11-20 09:47:01,991 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-20 09:47:02,010 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-11-20 09:47:02,208 INFO L349 Elim1Store]: treesize reduction 39, result has 20.4 percent of original size [2024-11-20 09:47:02,209 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 7 new quantified variables, introduced 6 case distinctions, treesize of input 154 treesize of output 88 [2024-11-20 09:47:02,239 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 09:47:02,240 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-20 09:47:03,503 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 318 treesize of output 280 [2024-11-20 09:47:03,679 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-20 09:47:03,680 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 12 new quantified variables, introduced 21 case distinctions, treesize of input 1184 treesize of output 868 [2024-11-20 09:47:23,594 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 09:47:23,594 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1788297363] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-20 09:47:23,594 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-20 09:47:23,594 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 9, 8] total 21 [2024-11-20 09:47:23,594 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [337477020] [2024-11-20 09:47:23,595 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-20 09:47:23,595 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-11-20 09:47:23,595 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 09:47:23,595 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-11-20 09:47:23,596 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=317, Unknown=0, NotChecked=0, Total=420 [2024-11-20 09:47:23,596 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 20 [2024-11-20 09:47:23,596 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 104 places, 83 transitions, 831 flow. Second operand has 21 states, 21 states have (on average 5.142857142857143) internal successors, (108), 21 states have internal predecessors, (108), 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 09:47:23,596 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 09:47:23,596 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 20 [2024-11-20 09:47:23,596 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 09:47:25,128 INFO L124 PetriNetUnfolderBase]: 461/899 cut-off events. [2024-11-20 09:47:25,129 INFO L125 PetriNetUnfolderBase]: For 5571/5571 co-relation queries the response was YES. [2024-11-20 09:47:25,132 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4783 conditions, 899 events. 461/899 cut-off events. For 5571/5571 co-relation queries the response was YES. Maximal size of possible extension queue 83. Compared 4685 event pairs, 13 based on Foata normal form. 4/856 useless extension candidates. Maximal degree in co-relation 4497. Up to 294 conditions per place. [2024-11-20 09:47:25,138 INFO L140 encePairwiseOnDemand]: 10/20 looper letters, 118 selfloop transitions, 91 changer transitions 31/241 dead transitions. [2024-11-20 09:47:25,138 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 130 places, 241 transitions, 2508 flow [2024-11-20 09:47:25,138 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2024-11-20 09:47:25,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2024-11-20 09:47:25,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 231 transitions. [2024-11-20 09:47:25,141 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4125 [2024-11-20 09:47:25,141 INFO L175 Difference]: Start difference. First operand has 104 places, 83 transitions, 831 flow. Second operand 28 states and 231 transitions. [2024-11-20 09:47:25,141 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 130 places, 241 transitions, 2508 flow [2024-11-20 09:47:25,156 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 116 places, 241 transitions, 2288 flow, removed 12 selfloop flow, removed 14 redundant places. [2024-11-20 09:47:25,160 INFO L231 Difference]: Finished difference. Result has 127 places, 140 transitions, 1554 flow [2024-11-20 09:47:25,161 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=721, PETRI_DIFFERENCE_MINUEND_PLACES=89, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=83, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=28, PETRI_FLOW=1554, PETRI_PLACES=127, PETRI_TRANSITIONS=140} [2024-11-20 09:47:25,161 INFO L277 CegarLoopForPetriNet]: 21 programPoint places, 106 predicate places. [2024-11-20 09:47:25,161 INFO L471 AbstractCegarLoop]: Abstraction has has 127 places, 140 transitions, 1554 flow [2024-11-20 09:47:25,161 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 5.142857142857143) internal successors, (108), 21 states have internal predecessors, (108), 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 09:47:25,162 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 09:47:25,162 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-20 09:47:25,170 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-11-20 09:47:25,365 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 09:47:25,366 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 09:47:25,366 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 09:47:25,366 INFO L85 PathProgramCache]: Analyzing trace with hash -1251118278, now seen corresponding path program 4 times [2024-11-20 09:47:25,366 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 09:47:25,366 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [573249787] [2024-11-20 09:47:25,366 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 09:47:25,366 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 09:47:25,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 09:47:25,489 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-20 09:47:25,489 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 09:47:25,489 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [573249787] [2024-11-20 09:47:25,490 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [573249787] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-20 09:47:25,490 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1917990493] [2024-11-20 09:47:25,490 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-20 09:47:25,490 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 09:47:25,490 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-20 09:47:25,492 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 09:47:25,493 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 09:47:25,558 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-20 09:47:25,558 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-20 09:47:25,559 INFO L255 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 23 conjuncts are in the unsatisfiable core [2024-11-20 09:47:25,560 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-20 09:47:25,692 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 15 treesize of output 7 [2024-11-20 09:47:25,699 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-20 09:47:25,699 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-20 09:47:26,085 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-20 09:47:26,085 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 150 treesize of output 119 [2024-11-20 09:47:26,361 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-20 09:47:26,361 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1917990493] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-20 09:47:26,361 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-20 09:47:26,361 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 8, 7] total 18 [2024-11-20 09:47:26,361 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1138486974] [2024-11-20 09:47:26,361 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-20 09:47:26,362 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-11-20 09:47:26,362 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 09:47:26,362 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-11-20 09:47:26,362 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=246, Unknown=0, NotChecked=0, Total=306 [2024-11-20 09:47:26,362 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 20 [2024-11-20 09:47:26,363 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 127 places, 140 transitions, 1554 flow. Second operand has 18 states, 18 states have (on average 5.388888888888889) internal successors, (97), 18 states have internal predecessors, (97), 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 09:47:26,363 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 09:47:26,363 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 20 [2024-11-20 09:47:26,363 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 09:47:27,199 INFO L124 PetriNetUnfolderBase]: 477/918 cut-off events. [2024-11-20 09:47:27,199 INFO L125 PetriNetUnfolderBase]: For 8382/8382 co-relation queries the response was YES. [2024-11-20 09:47:27,203 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5490 conditions, 918 events. 477/918 cut-off events. For 8382/8382 co-relation queries the response was YES. Maximal size of possible extension queue 83. Compared 4750 event pairs, 33 based on Foata normal form. 7/925 useless extension candidates. Maximal degree in co-relation 5296. Up to 702 conditions per place. [2024-11-20 09:47:27,208 INFO L140 encePairwiseOnDemand]: 11/20 looper letters, 120 selfloop transitions, 60 changer transitions 3/184 dead transitions. [2024-11-20 09:47:27,208 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 134 places, 184 transitions, 2260 flow [2024-11-20 09:47:27,209 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-11-20 09:47:27,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-11-20 09:47:27,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 113 transitions. [2024-11-20 09:47:27,211 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4346153846153846 [2024-11-20 09:47:27,211 INFO L175 Difference]: Start difference. First operand has 127 places, 140 transitions, 1554 flow. Second operand 13 states and 113 transitions. [2024-11-20 09:47:27,211 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 134 places, 184 transitions, 2260 flow [2024-11-20 09:47:27,235 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 126 places, 184 transitions, 2094 flow, removed 55 selfloop flow, removed 8 redundant places. [2024-11-20 09:47:27,238 INFO L231 Difference]: Finished difference. Result has 131 places, 156 transitions, 1770 flow [2024-11-20 09:47:27,239 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=1400, PETRI_DIFFERENCE_MINUEND_PLACES=114, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=140, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=80, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=1770, PETRI_PLACES=131, PETRI_TRANSITIONS=156} [2024-11-20 09:47:27,241 INFO L277 CegarLoopForPetriNet]: 21 programPoint places, 110 predicate places. [2024-11-20 09:47:27,241 INFO L471 AbstractCegarLoop]: Abstraction has has 131 places, 156 transitions, 1770 flow [2024-11-20 09:47:27,243 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 5.388888888888889) internal successors, (97), 18 states have internal predecessors, (97), 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 09:47:27,243 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 09:47:27,243 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-20 09:47:27,250 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2024-11-20 09:47:27,443 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2024-11-20 09:47:27,444 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 09:47:27,444 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 09:47:27,444 INFO L85 PathProgramCache]: Analyzing trace with hash -1172470038, now seen corresponding path program 5 times [2024-11-20 09:47:27,444 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 09:47:27,444 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1450714004] [2024-11-20 09:47:27,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 09:47:27,444 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 09:47:27,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 09:47:27,564 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-20 09:47:27,564 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 09:47:27,565 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1450714004] [2024-11-20 09:47:27,565 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1450714004] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-20 09:47:27,565 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1427126625] [2024-11-20 09:47:27,566 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-20 09:47:27,566 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 09:47:27,566 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-20 09:47:27,569 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 09:47:27,573 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 09:47:27,635 INFO L227 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-20 09:47:27,635 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-20 09:47:27,639 INFO L255 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 21 conjuncts are in the unsatisfiable core [2024-11-20 09:47:27,640 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-20 09:47:27,771 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 105 treesize of output 93 [2024-11-20 09:47:27,819 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 09:47:27,819 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-20 09:47:28,029 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-20 09:47:28,029 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 181 treesize of output 142 [2024-11-20 09:47:28,786 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 09:47:28,787 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1427126625] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-20 09:47:28,787 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-20 09:47:28,787 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 8, 8] total 19 [2024-11-20 09:47:28,787 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1454450771] [2024-11-20 09:47:28,787 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-20 09:47:28,787 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-11-20 09:47:28,787 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 09:47:28,787 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-11-20 09:47:28,788 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=273, Unknown=0, NotChecked=0, Total=342 [2024-11-20 09:47:28,788 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 20 [2024-11-20 09:47:28,788 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 131 places, 156 transitions, 1770 flow. Second operand has 19 states, 19 states have (on average 5.157894736842105) internal successors, (98), 19 states have internal predecessors, (98), 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 09:47:28,788 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 09:47:28,788 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 20 [2024-11-20 09:47:28,788 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 09:47:30,694 INFO L124 PetriNetUnfolderBase]: 619/1243 cut-off events. [2024-11-20 09:47:30,695 INFO L125 PetriNetUnfolderBase]: For 11905/11905 co-relation queries the response was YES. [2024-11-20 09:47:30,699 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7326 conditions, 1243 events. 619/1243 cut-off events. For 11905/11905 co-relation queries the response was YES. Maximal size of possible extension queue 115. Compared 7279 event pairs, 52 based on Foata normal form. 8/1251 useless extension candidates. Maximal degree in co-relation 7125. Up to 431 conditions per place. [2024-11-20 09:47:30,706 INFO L140 encePairwiseOnDemand]: 10/20 looper letters, 166 selfloop transitions, 91 changer transitions 14/272 dead transitions. [2024-11-20 09:47:30,706 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 156 places, 272 transitions, 3269 flow [2024-11-20 09:47:30,706 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2024-11-20 09:47:30,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2024-11-20 09:47:30,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 221 transitions. [2024-11-20 09:47:30,707 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.425 [2024-11-20 09:47:30,707 INFO L175 Difference]: Start difference. First operand has 131 places, 156 transitions, 1770 flow. Second operand 26 states and 221 transitions. [2024-11-20 09:47:30,707 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 156 places, 272 transitions, 3269 flow [2024-11-20 09:47:30,734 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 151 places, 272 transitions, 3213 flow, removed 6 selfloop flow, removed 5 redundant places. [2024-11-20 09:47:30,737 INFO L231 Difference]: Finished difference. Result has 156 places, 182 transitions, 2314 flow [2024-11-20 09:47:30,737 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=1710, PETRI_DIFFERENCE_MINUEND_PLACES=126, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=155, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=65, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=72, PETRI_DIFFERENCE_SUBTRAHEND_STATES=26, PETRI_FLOW=2314, PETRI_PLACES=156, PETRI_TRANSITIONS=182} [2024-11-20 09:47:30,738 INFO L277 CegarLoopForPetriNet]: 21 programPoint places, 135 predicate places. [2024-11-20 09:47:30,738 INFO L471 AbstractCegarLoop]: Abstraction has has 156 places, 182 transitions, 2314 flow [2024-11-20 09:47:30,738 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 5.157894736842105) internal successors, (98), 19 states have internal predecessors, (98), 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 09:47:30,738 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 09:47:30,738 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-20 09:47:30,746 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-11-20 09:47:30,938 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 09:47:30,939 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 09:47:30,939 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 09:47:30,939 INFO L85 PathProgramCache]: Analyzing trace with hash -2031939214, now seen corresponding path program 6 times [2024-11-20 09:47:30,939 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 09:47:30,939 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1571300533] [2024-11-20 09:47:30,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 09:47:30,939 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 09:47:30,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 09:47:31,066 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-20 09:47:31,066 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 09:47:31,066 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1571300533] [2024-11-20 09:47:31,066 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1571300533] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-20 09:47:31,066 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1210453704] [2024-11-20 09:47:31,066 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-20 09:47:31,066 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 09:47:31,067 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-20 09:47:31,069 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 09:47:31,073 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 09:47:31,198 INFO L227 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2024-11-20 09:47:31,199 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-20 09:47:31,199 INFO L255 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-11-20 09:47:31,200 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-20 09:47:31,232 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-20 09:47:31,232 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-20 09:47:31,292 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-20 09:47:31,292 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1210453704] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-20 09:47:31,292 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-20 09:47:31,292 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 11 [2024-11-20 09:47:31,292 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1749328047] [2024-11-20 09:47:31,292 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-20 09:47:31,292 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-11-20 09:47:31,293 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 09:47:31,293 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-11-20 09:47:31,293 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2024-11-20 09:47:31,293 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 20 [2024-11-20 09:47:31,293 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 156 places, 182 transitions, 2314 flow. Second operand has 11 states, 11 states have (on average 5.0) internal successors, (55), 11 states have internal predecessors, (55), 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 09:47:31,293 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 09:47:31,293 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 20 [2024-11-20 09:47:31,293 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 09:47:31,876 INFO L124 PetriNetUnfolderBase]: 638/1287 cut-off events. [2024-11-20 09:47:31,876 INFO L125 PetriNetUnfolderBase]: For 13934/13934 co-relation queries the response was YES. [2024-11-20 09:47:31,881 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7990 conditions, 1287 events. 638/1287 cut-off events. For 13934/13934 co-relation queries the response was YES. Maximal size of possible extension queue 120. Compared 7662 event pairs, 274 based on Foata normal form. 10/1297 useless extension candidates. Maximal degree in co-relation 7771. Up to 1097 conditions per place. [2024-11-20 09:47:31,887 INFO L140 encePairwiseOnDemand]: 14/20 looper letters, 166 selfloop transitions, 53 changer transitions 0/220 dead transitions. [2024-11-20 09:47:31,887 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 167 places, 220 transitions, 2981 flow [2024-11-20 09:47:31,887 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-11-20 09:47:31,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-11-20 09:47:31,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 100 transitions. [2024-11-20 09:47:31,888 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4166666666666667 [2024-11-20 09:47:31,888 INFO L175 Difference]: Start difference. First operand has 156 places, 182 transitions, 2314 flow. Second operand 12 states and 100 transitions. [2024-11-20 09:47:31,888 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 167 places, 220 transitions, 2981 flow [2024-11-20 09:47:31,927 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 156 places, 220 transitions, 2874 flow, removed 11 selfloop flow, removed 11 redundant places. [2024-11-20 09:47:31,931 INFO L231 Difference]: Finished difference. Result has 160 places, 196 transitions, 2482 flow [2024-11-20 09:47:31,932 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=2213, PETRI_DIFFERENCE_MINUEND_PLACES=145, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=182, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=137, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=2482, PETRI_PLACES=160, PETRI_TRANSITIONS=196} [2024-11-20 09:47:31,933 INFO L277 CegarLoopForPetriNet]: 21 programPoint places, 139 predicate places. [2024-11-20 09:47:31,933 INFO L471 AbstractCegarLoop]: Abstraction has has 160 places, 196 transitions, 2482 flow [2024-11-20 09:47:31,933 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 5.0) internal successors, (55), 11 states have internal predecessors, (55), 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 09:47:31,933 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 09:47:31,933 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-20 09:47:31,941 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2024-11-20 09:47:32,133 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 09:47:32,134 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 09:47:32,134 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 09:47:32,134 INFO L85 PathProgramCache]: Analyzing trace with hash 982989216, now seen corresponding path program 7 times [2024-11-20 09:47:32,134 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 09:47:32,135 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [705759427] [2024-11-20 09:47:32,135 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 09:47:32,135 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 09:47:32,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 09:47:32,236 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-20 09:47:32,236 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 09:47:32,237 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [705759427] [2024-11-20 09:47:32,237 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [705759427] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-20 09:47:32,237 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1523018449] [2024-11-20 09:47:32,237 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-20 09:47:32,237 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 09:47:32,237 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-20 09:47:32,239 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 09:47:32,241 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 09:47:32,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 09:47:32,298 INFO L255 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 31 conjuncts are in the unsatisfiable core [2024-11-20 09:47:32,300 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-20 09:47:32,321 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-11-20 09:47:32,479 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 15 treesize of output 7 [2024-11-20 09:47:32,489 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 09:47:32,489 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-20 09:47:35,788 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 33 treesize of output 29 [2024-11-20 09:47:35,795 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2024-11-20 09:47:35,796 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 62 treesize of output 41 [2024-11-20 09:47:35,820 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 09:47:35,820 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1523018449] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-20 09:47:35,820 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-20 09:47:35,820 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 9, 9] total 21 [2024-11-20 09:47:35,820 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1164147177] [2024-11-20 09:47:35,820 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-20 09:47:35,821 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-11-20 09:47:35,821 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 09:47:35,821 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-11-20 09:47:35,821 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=334, Unknown=0, NotChecked=0, Total=420 [2024-11-20 09:47:35,821 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 20 [2024-11-20 09:47:35,822 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 160 places, 196 transitions, 2482 flow. Second operand has 21 states, 21 states have (on average 5.0476190476190474) internal successors, (106), 21 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 09:47:35,822 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 09:47:35,822 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 20 [2024-11-20 09:47:35,822 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 09:47:39,128 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.13s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-11-20 09:47:40,430 INFO L124 PetriNetUnfolderBase]: 640/1313 cut-off events. [2024-11-20 09:47:40,430 INFO L125 PetriNetUnfolderBase]: For 14986/14986 co-relation queries the response was YES. [2024-11-20 09:47:40,435 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8392 conditions, 1313 events. 640/1313 cut-off events. For 14986/14986 co-relation queries the response was YES. Maximal size of possible extension queue 125. Compared 7981 event pairs, 59 based on Foata normal form. 8/1321 useless extension candidates. Maximal degree in co-relation 8235. Up to 946 conditions per place. [2024-11-20 09:47:40,441 INFO L140 encePairwiseOnDemand]: 10/20 looper letters, 130 selfloop transitions, 105 changer transitions 6/242 dead transitions. [2024-11-20 09:47:40,442 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 178 places, 242 transitions, 3360 flow [2024-11-20 09:47:40,442 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2024-11-20 09:47:40,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2024-11-20 09:47:40,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 149 transitions. [2024-11-20 09:47:40,443 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.39210526315789473 [2024-11-20 09:47:40,443 INFO L175 Difference]: Start difference. First operand has 160 places, 196 transitions, 2482 flow. Second operand 19 states and 149 transitions. [2024-11-20 09:47:40,443 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 178 places, 242 transitions, 3360 flow [2024-11-20 09:47:40,485 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 173 places, 242 transitions, 3267 flow, removed 26 selfloop flow, removed 5 redundant places. [2024-11-20 09:47:40,488 INFO L231 Difference]: Finished difference. Result has 178 places, 202 transitions, 2769 flow [2024-11-20 09:47:40,488 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=2358, PETRI_DIFFERENCE_MINUEND_PLACES=155, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=194, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=97, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=91, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=2769, PETRI_PLACES=178, PETRI_TRANSITIONS=202} [2024-11-20 09:47:40,488 INFO L277 CegarLoopForPetriNet]: 21 programPoint places, 157 predicate places. [2024-11-20 09:47:40,488 INFO L471 AbstractCegarLoop]: Abstraction has has 178 places, 202 transitions, 2769 flow [2024-11-20 09:47:40,488 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 5.0476190476190474) internal successors, (106), 21 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 09:47:40,488 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 09:47:40,489 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-20 09:47:40,495 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2024-11-20 09:47:40,689 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,SelfDestructingSolverStorable14 [2024-11-20 09:47:40,689 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 09:47:40,689 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 09:47:40,689 INFO L85 PathProgramCache]: Analyzing trace with hash 1061637456, now seen corresponding path program 8 times [2024-11-20 09:47:40,689 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 09:47:40,690 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [714272660] [2024-11-20 09:47:40,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 09:47:40,690 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 09:47:40,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 09:47:40,823 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-20 09:47:40,824 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 09:47:40,824 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [714272660] [2024-11-20 09:47:40,824 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [714272660] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-20 09:47:40,824 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [184750248] [2024-11-20 09:47:40,824 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-20 09:47:40,824 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 09:47:40,825 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-20 09:47:40,827 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 09:47:40,828 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 09:47:40,894 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-20 09:47:40,894 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-20 09:47:40,895 INFO L255 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 32 conjuncts are in the unsatisfiable core [2024-11-20 09:47:40,897 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-20 09:47:40,921 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-11-20 09:47:41,086 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2024-11-20 09:47:41,086 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 115 treesize of output 104 [2024-11-20 09:47:41,171 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 09:47:41,171 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-20 09:47:41,758 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 33 treesize of output 29 [2024-11-20 09:47:41,765 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2024-11-20 09:47:41,765 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 62 treesize of output 41 [2024-11-20 09:47:41,776 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 87 treesize of output 77 [2024-11-20 09:47:41,809 INFO L349 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2024-11-20 09:47:41,809 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 239 treesize of output 193 [2024-11-20 09:47:42,213 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 09:47:42,213 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [184750248] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-20 09:47:42,213 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-20 09:47:42,213 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 8, 8] total 19 [2024-11-20 09:47:42,213 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [981804468] [2024-11-20 09:47:42,213 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-20 09:47:42,214 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-11-20 09:47:42,214 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 09:47:42,214 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-11-20 09:47:42,214 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=273, Unknown=0, NotChecked=0, Total=342 [2024-11-20 09:47:42,214 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 20 [2024-11-20 09:47:42,214 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 178 places, 202 transitions, 2769 flow. Second operand has 19 states, 19 states have (on average 5.157894736842105) internal successors, (98), 19 states have internal predecessors, (98), 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 09:47:42,215 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 09:47:42,215 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 20 [2024-11-20 09:47:42,215 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 09:47:44,185 INFO L124 PetriNetUnfolderBase]: 769/1569 cut-off events. [2024-11-20 09:47:44,186 INFO L125 PetriNetUnfolderBase]: For 23575/23575 co-relation queries the response was YES. [2024-11-20 09:47:44,193 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10723 conditions, 1569 events. 769/1569 cut-off events. For 23575/23575 co-relation queries the response was YES. Maximal size of possible extension queue 152. Compared 9948 event pairs, 78 based on Foata normal form. 9/1578 useless extension candidates. Maximal degree in co-relation 10552. Up to 793 conditions per place. [2024-11-20 09:47:44,205 INFO L140 encePairwiseOnDemand]: 10/20 looper letters, 141 selfloop transitions, 140 changer transitions 18/300 dead transitions. [2024-11-20 09:47:44,206 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 196 places, 300 transitions, 4468 flow [2024-11-20 09:47:44,206 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2024-11-20 09:47:44,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2024-11-20 09:47:44,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 204 transitions. [2024-11-20 09:47:44,208 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4434782608695652 [2024-11-20 09:47:44,208 INFO L175 Difference]: Start difference. First operand has 178 places, 202 transitions, 2769 flow. Second operand 23 states and 204 transitions. [2024-11-20 09:47:44,208 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 196 places, 300 transitions, 4468 flow [2024-11-20 09:47:44,279 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 184 places, 300 transitions, 4062 flow, removed 128 selfloop flow, removed 12 redundant places. [2024-11-20 09:47:44,284 INFO L231 Difference]: Finished difference. Result has 189 places, 232 transitions, 3378 flow [2024-11-20 09:47:44,284 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=2488, PETRI_DIFFERENCE_MINUEND_PLACES=162, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=201, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=114, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=72, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=3378, PETRI_PLACES=189, PETRI_TRANSITIONS=232} [2024-11-20 09:47:44,285 INFO L277 CegarLoopForPetriNet]: 21 programPoint places, 168 predicate places. [2024-11-20 09:47:44,285 INFO L471 AbstractCegarLoop]: Abstraction has has 189 places, 232 transitions, 3378 flow [2024-11-20 09:47:44,285 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 5.157894736842105) internal successors, (98), 19 states have internal predecessors, (98), 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 09:47:44,285 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 09:47:44,285 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-20 09:47:44,294 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2024-11-20 09:47:44,486 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,SelfDestructingSolverStorable15 [2024-11-20 09:47:44,486 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 09:47:44,487 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 09:47:44,487 INFO L85 PathProgramCache]: Analyzing trace with hash 183734254, now seen corresponding path program 9 times [2024-11-20 09:47:44,487 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 09:47:44,487 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [678627596] [2024-11-20 09:47:44,487 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 09:47:44,487 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 09:47:44,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 09:47:44,592 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-20 09:47:44,592 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 09:47:44,592 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [678627596] [2024-11-20 09:47:44,592 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [678627596] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-20 09:47:44,592 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1614007929] [2024-11-20 09:47:44,592 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-20 09:47:44,592 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 09:47:44,593 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-20 09:47:44,595 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 09:47:44,599 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 09:47:44,662 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-11-20 09:47:44,662 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-20 09:47:44,663 INFO L255 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 23 conjuncts are in the unsatisfiable core [2024-11-20 09:47:44,671 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-20 09:47:44,832 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-20 09:47:44,834 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 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 23 [2024-11-20 09:47:44,862 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-20 09:47:44,863 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-20 09:47:44,993 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-20 09:47:44,993 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 158 treesize of output 158 [2024-11-20 09:47:45,214 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-20 09:47:45,214 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1614007929] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-20 09:47:45,214 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-20 09:47:45,214 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 7] total 17 [2024-11-20 09:47:45,215 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1031172386] [2024-11-20 09:47:45,215 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-20 09:47:45,215 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-11-20 09:47:45,216 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 09:47:45,216 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-11-20 09:47:45,217 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=215, Unknown=0, NotChecked=0, Total=272 [2024-11-20 09:47:45,217 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 20 [2024-11-20 09:47:45,217 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 189 places, 232 transitions, 3378 flow. Second operand has 17 states, 17 states have (on average 5.0588235294117645) internal successors, (86), 17 states have internal predecessors, (86), 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 09:47:45,217 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 09:47:45,217 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 20 [2024-11-20 09:47:45,217 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 09:47:45,917 INFO L124 PetriNetUnfolderBase]: 885/1848 cut-off events. [2024-11-20 09:47:45,917 INFO L125 PetriNetUnfolderBase]: For 29512/29512 co-relation queries the response was YES. [2024-11-20 09:47:45,926 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13105 conditions, 1848 events. 885/1848 cut-off events. For 29512/29512 co-relation queries the response was YES. Maximal size of possible extension queue 178. Compared 12409 event pairs, 50 based on Foata normal form. 10/1858 useless extension candidates. Maximal degree in co-relation 12913. Up to 699 conditions per place. [2024-11-20 09:47:45,934 INFO L140 encePairwiseOnDemand]: 11/20 looper letters, 169 selfloop transitions, 151 changer transitions 5/326 dead transitions. [2024-11-20 09:47:45,934 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 205 places, 326 transitions, 5180 flow [2024-11-20 09:47:45,936 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-11-20 09:47:45,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2024-11-20 09:47:45,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 140 transitions. [2024-11-20 09:47:45,936 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4117647058823529 [2024-11-20 09:47:45,936 INFO L175 Difference]: Start difference. First operand has 189 places, 232 transitions, 3378 flow. Second operand 17 states and 140 transitions. [2024-11-20 09:47:45,936 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 205 places, 326 transitions, 5180 flow [2024-11-20 09:47:46,032 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 198 places, 326 transitions, 5042 flow, removed 47 selfloop flow, removed 7 redundant places. [2024-11-20 09:47:46,036 INFO L231 Difference]: Finished difference. Result has 206 places, 266 transitions, 4277 flow [2024-11-20 09:47:46,037 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=3264, PETRI_DIFFERENCE_MINUEND_PLACES=182, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=232, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=123, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=90, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=4277, PETRI_PLACES=206, PETRI_TRANSITIONS=266} [2024-11-20 09:47:46,037 INFO L277 CegarLoopForPetriNet]: 21 programPoint places, 185 predicate places. [2024-11-20 09:47:46,037 INFO L471 AbstractCegarLoop]: Abstraction has has 206 places, 266 transitions, 4277 flow [2024-11-20 09:47:46,037 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 5.0588235294117645) internal successors, (86), 17 states have internal predecessors, (86), 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 09:47:46,037 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 09:47:46,038 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-20 09:47:46,045 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2024-11-20 09:47:46,242 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,SelfDestructingSolverStorable16 [2024-11-20 09:47:46,243 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 09:47:46,243 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 09:47:46,243 INFO L85 PathProgramCache]: Analyzing trace with hash 202168280, now seen corresponding path program 10 times [2024-11-20 09:47:46,243 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 09:47:46,243 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [265481118] [2024-11-20 09:47:46,243 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 09:47:46,243 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 09:47:46,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 09:47:46,375 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-20 09:47:46,375 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 09:47:46,375 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [265481118] [2024-11-20 09:47:46,376 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [265481118] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-20 09:47:46,376 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1291296326] [2024-11-20 09:47:46,376 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-20 09:47:46,376 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 09:47:46,376 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-20 09:47:46,378 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 09:47:46,379 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 09:47:46,438 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-20 09:47:46,439 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-20 09:47:46,440 INFO L255 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 25 conjuncts are in the unsatisfiable core [2024-11-20 09:47:46,441 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-20 09:47:46,637 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-20 09:47:46,637 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 3 new quantified variables, introduced 1 case distinctions, treesize of input 48 treesize of output 39 [2024-11-20 09:47:46,698 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-20 09:47:46,698 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-20 09:47:46,866 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-20 09:47:46,867 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 154 treesize of output 154 [2024-11-20 09:47:47,510 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-20 09:47:47,511 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1291296326] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-20 09:47:47,511 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-20 09:47:47,511 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 8, 7] total 18 [2024-11-20 09:47:47,511 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1894218505] [2024-11-20 09:47:47,511 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-20 09:47:47,511 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-11-20 09:47:47,511 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 09:47:47,512 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-11-20 09:47:47,512 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=244, Unknown=0, NotChecked=0, Total=306 [2024-11-20 09:47:47,512 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 20 [2024-11-20 09:47:47,512 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 206 places, 266 transitions, 4277 flow. Second operand has 18 states, 18 states have (on average 5.333333333333333) internal successors, (96), 18 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 09:47:47,512 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 09:47:47,512 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 20 [2024-11-20 09:47:47,512 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 09:47:48,208 INFO L124 PetriNetUnfolderBase]: 953/2127 cut-off events. [2024-11-20 09:47:48,208 INFO L125 PetriNetUnfolderBase]: For 37056/37056 co-relation queries the response was YES. [2024-11-20 09:47:48,219 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15538 conditions, 2127 events. 953/2127 cut-off events. For 37056/37056 co-relation queries the response was YES. Maximal size of possible extension queue 219. Compared 15733 event pairs, 6 based on Foata normal form. 4/2131 useless extension candidates. Maximal degree in co-relation 15316. Up to 1237 conditions per place. [2024-11-20 09:47:48,226 INFO L140 encePairwiseOnDemand]: 12/20 looper letters, 189 selfloop transitions, 138 changer transitions 20/348 dead transitions. [2024-11-20 09:47:48,227 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 221 places, 348 transitions, 5951 flow [2024-11-20 09:47:48,228 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-11-20 09:47:48,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2024-11-20 09:47:48,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 124 transitions. [2024-11-20 09:47:48,228 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.3875 [2024-11-20 09:47:48,228 INFO L175 Difference]: Start difference. First operand has 206 places, 266 transitions, 4277 flow. Second operand 16 states and 124 transitions. [2024-11-20 09:47:48,228 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 221 places, 348 transitions, 5951 flow [2024-11-20 09:47:48,390 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 214 places, 348 transitions, 5513 flow, removed 88 selfloop flow, removed 7 redundant places. [2024-11-20 09:47:48,394 INFO L231 Difference]: Finished difference. Result has 216 places, 295 transitions, 4697 flow [2024-11-20 09:47:48,395 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=3976, PETRI_DIFFERENCE_MINUEND_PLACES=199, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=266, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=109, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=141, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=4697, PETRI_PLACES=216, PETRI_TRANSITIONS=295} [2024-11-20 09:47:48,395 INFO L277 CegarLoopForPetriNet]: 21 programPoint places, 195 predicate places. [2024-11-20 09:47:48,395 INFO L471 AbstractCegarLoop]: Abstraction has has 216 places, 295 transitions, 4697 flow [2024-11-20 09:47:48,395 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 5.333333333333333) internal successors, (96), 18 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 09:47:48,395 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 09:47:48,395 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-20 09:47:48,402 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2024-11-20 09:47:48,596 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,SelfDestructingSolverStorable17 [2024-11-20 09:47:48,596 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 09:47:48,596 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 09:47:48,596 INFO L85 PathProgramCache]: Analyzing trace with hash 1297409021, now seen corresponding path program 11 times [2024-11-20 09:47:48,596 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 09:47:48,596 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1488398192] [2024-11-20 09:47:48,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 09:47:48,597 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 09:47:48,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 09:47:48,960 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 09:47:48,961 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 09:47:48,961 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1488398192] [2024-11-20 09:47:48,961 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1488398192] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-20 09:47:48,961 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1511073169] [2024-11-20 09:47:48,961 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-20 09:47:48,961 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 09:47:48,961 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-20 09:47:48,963 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 09:47:48,965 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 09:47:49,028 INFO L227 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-20 09:47:49,029 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-20 09:47:49,030 INFO L255 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 26 conjuncts are in the unsatisfiable core [2024-11-20 09:47:49,031 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-20 09:47:49,046 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 09:47:49,228 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 09:47:49,229 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-20 09:47:50,303 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 87 treesize of output 77 [2024-11-20 09:47:50,335 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-20 09:47:50,335 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 202 treesize of output 192 [2024-11-20 09:47:51,464 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 09:47:51,464 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1511073169] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-20 09:47:51,464 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-20 09:47:51,464 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 22 [2024-11-20 09:47:51,464 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [796560135] [2024-11-20 09:47:51,464 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-20 09:47:51,465 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2024-11-20 09:47:51,465 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 09:47:51,465 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2024-11-20 09:47:51,465 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=401, Unknown=0, NotChecked=0, Total=506 [2024-11-20 09:47:51,465 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 20 [2024-11-20 09:47:51,466 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 216 places, 295 transitions, 4697 flow. Second operand has 23 states, 23 states have (on average 4.913043478260869) internal successors, (113), 23 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 09:47:51,466 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 09:47:51,466 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 20 [2024-11-20 09:47:51,466 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 09:47:54,216 INFO L124 PetriNetUnfolderBase]: 927/2063 cut-off events. [2024-11-20 09:47:54,216 INFO L125 PetriNetUnfolderBase]: For 40477/40477 co-relation queries the response was YES. [2024-11-20 09:47:54,229 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15577 conditions, 2063 events. 927/2063 cut-off events. For 40477/40477 co-relation queries the response was YES. Maximal size of possible extension queue 216. Compared 15235 event pairs, 41 based on Foata normal form. 36/2099 useless extension candidates. Maximal degree in co-relation 15344. Up to 594 conditions per place. [2024-11-20 09:47:54,236 INFO L140 encePairwiseOnDemand]: 11/20 looper letters, 154 selfloop transitions, 41 changer transitions 251/447 dead transitions. [2024-11-20 09:47:54,236 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 246 places, 447 transitions, 7320 flow [2024-11-20 09:47:54,236 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2024-11-20 09:47:54,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2024-11-20 09:47:54,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 266 transitions. [2024-11-20 09:47:54,240 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4290322580645161 [2024-11-20 09:47:54,240 INFO L175 Difference]: Start difference. First operand has 216 places, 295 transitions, 4697 flow. Second operand 31 states and 266 transitions. [2024-11-20 09:47:54,240 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 246 places, 447 transitions, 7320 flow [2024-11-20 09:47:54,426 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 232 places, 447 transitions, 7039 flow, removed 96 selfloop flow, removed 14 redundant places. [2024-11-20 09:47:54,431 INFO L231 Difference]: Finished difference. Result has 243 places, 161 transitions, 2367 flow [2024-11-20 09:47:54,431 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=4534, PETRI_DIFFERENCE_MINUEND_PLACES=202, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=295, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=254, PETRI_DIFFERENCE_SUBTRAHEND_STATES=31, PETRI_FLOW=2367, PETRI_PLACES=243, PETRI_TRANSITIONS=161} [2024-11-20 09:47:54,432 INFO L277 CegarLoopForPetriNet]: 21 programPoint places, 222 predicate places. [2024-11-20 09:47:54,432 INFO L471 AbstractCegarLoop]: Abstraction has has 243 places, 161 transitions, 2367 flow [2024-11-20 09:47:54,433 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 4.913043478260869) internal successors, (113), 23 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 09:47:54,433 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 09:47:54,433 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-20 09:47:54,439 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 09:47:54,633 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 09:47:54,633 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 09:47:54,634 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 09:47:54,634 INFO L85 PathProgramCache]: Analyzing trace with hash -1947291036, now seen corresponding path program 2 times [2024-11-20 09:47:54,634 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 09:47:54,634 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [58798066] [2024-11-20 09:47:54,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 09:47:54,634 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 09:47:54,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 09:47:54,762 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-20 09:47:54,762 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 09:47:54,762 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [58798066] [2024-11-20 09:47:54,762 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [58798066] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-20 09:47:54,762 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [438070174] [2024-11-20 09:47:54,762 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-20 09:47:54,762 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 09:47:54,762 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-20 09:47:54,765 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 09:47:54,766 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 09:47:54,877 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-20 09:47:54,877 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-20 09:47:54,880 INFO L255 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-11-20 09:47:54,881 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-20 09:47:54,933 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-20 09:47:54,934 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-20 09:47:55,035 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-20 09:47:55,036 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [438070174] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-20 09:47:55,036 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-20 09:47:55,036 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2024-11-20 09:47:55,036 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2112274579] [2024-11-20 09:47:55,036 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-20 09:47:55,036 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-11-20 09:47:55,036 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 09:47:55,037 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-11-20 09:47:55,037 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2024-11-20 09:47:55,037 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 20 [2024-11-20 09:47:55,037 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 243 places, 161 transitions, 2367 flow. Second operand has 12 states, 12 states have (on average 5.083333333333333) internal successors, (61), 12 states have internal predecessors, (61), 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 09:47:55,037 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 09:47:55,037 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 20 [2024-11-20 09:47:55,037 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 09:47:55,805 INFO L124 PetriNetUnfolderBase]: 461/1029 cut-off events. [2024-11-20 09:47:55,805 INFO L125 PetriNetUnfolderBase]: For 15493/15493 co-relation queries the response was YES. [2024-11-20 09:47:55,811 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7277 conditions, 1029 events. 461/1029 cut-off events. For 15493/15493 co-relation queries the response was YES. Maximal size of possible extension queue 109. Compared 6395 event pairs, 90 based on Foata normal form. 24/1053 useless extension candidates. Maximal degree in co-relation 7154. Up to 400 conditions per place. [2024-11-20 09:47:55,815 INFO L140 encePairwiseOnDemand]: 14/20 looper letters, 159 selfloop transitions, 97 changer transitions 0/257 dead transitions. [2024-11-20 09:47:55,815 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 220 places, 257 transitions, 3873 flow [2024-11-20 09:47:55,815 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2024-11-20 09:47:55,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2024-11-20 09:47:55,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 173 transitions. [2024-11-20 09:47:55,816 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.45526315789473687 [2024-11-20 09:47:55,816 INFO L175 Difference]: Start difference. First operand has 243 places, 161 transitions, 2367 flow. Second operand 19 states and 173 transitions. [2024-11-20 09:47:55,816 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 220 places, 257 transitions, 3873 flow [2024-11-20 09:47:55,875 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 187 places, 257 transitions, 3301 flow, removed 212 selfloop flow, removed 33 redundant places. [2024-11-20 09:47:55,879 INFO L231 Difference]: Finished difference. Result has 196 places, 196 transitions, 2809 flow [2024-11-20 09:47:55,880 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=2080, PETRI_DIFFERENCE_MINUEND_PLACES=169, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=160, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=68, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=84, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=2809, PETRI_PLACES=196, PETRI_TRANSITIONS=196} [2024-11-20 09:47:55,880 INFO L277 CegarLoopForPetriNet]: 21 programPoint places, 175 predicate places. [2024-11-20 09:47:55,880 INFO L471 AbstractCegarLoop]: Abstraction has has 196 places, 196 transitions, 2809 flow [2024-11-20 09:47:55,880 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 5.083333333333333) internal successors, (61), 12 states have internal predecessors, (61), 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 09:47:55,881 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 09:47:55,881 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-20 09:47:55,890 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 09:47:56,084 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,SelfDestructingSolverStorable19 [2024-11-20 09:47:56,085 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 09:47:56,085 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 09:47:56,085 INFO L85 PathProgramCache]: Analyzing trace with hash -1568890344, now seen corresponding path program 3 times [2024-11-20 09:47:56,085 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 09:47:56,085 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1509943107] [2024-11-20 09:47:56,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 09:47:56,086 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 09:47:56,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 09:47:56,223 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-20 09:47:56,224 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 09:47:56,224 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1509943107] [2024-11-20 09:47:56,224 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1509943107] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-20 09:47:56,224 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1841160072] [2024-11-20 09:47:56,224 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-20 09:47:56,224 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 09:47:56,224 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-20 09:47:56,226 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 09:47:56,227 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 09:47:56,341 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-11-20 09:47:56,341 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-20 09:47:56,342 INFO L255 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-11-20 09:47:56,345 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-20 09:47:56,400 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-20 09:47:56,401 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-20 09:47:56,475 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-20 09:47:56,475 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1841160072] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-20 09:47:56,475 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-20 09:47:56,475 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 13 [2024-11-20 09:47:56,475 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [974604737] [2024-11-20 09:47:56,475 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-20 09:47:56,476 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-11-20 09:47:56,476 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 09:47:56,476 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-11-20 09:47:56,476 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=104, Unknown=0, NotChecked=0, Total=156 [2024-11-20 09:47:56,476 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 20 [2024-11-20 09:47:56,476 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 196 places, 196 transitions, 2809 flow. Second operand has 13 states, 13 states have (on average 5.0) internal successors, (65), 13 states have internal predecessors, (65), 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 09:47:56,477 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 09:47:56,477 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 20 [2024-11-20 09:47:56,477 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 09:47:57,139 INFO L124 PetriNetUnfolderBase]: 731/1574 cut-off events. [2024-11-20 09:47:57,139 INFO L125 PetriNetUnfolderBase]: For 17246/17246 co-relation queries the response was YES. [2024-11-20 09:47:57,147 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10456 conditions, 1574 events. 731/1574 cut-off events. For 17246/17246 co-relation queries the response was YES. Maximal size of possible extension queue 145. Compared 10343 event pairs, 43 based on Foata normal form. 15/1589 useless extension candidates. Maximal degree in co-relation 10347. Up to 458 conditions per place. [2024-11-20 09:47:57,155 INFO L140 encePairwiseOnDemand]: 13/20 looper letters, 181 selfloop transitions, 166 changer transitions 0/348 dead transitions. [2024-11-20 09:47:57,155 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 216 places, 348 transitions, 5351 flow [2024-11-20 09:47:57,156 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2024-11-20 09:47:57,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2024-11-20 09:47:57,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 181 transitions. [2024-11-20 09:47:57,158 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.430952380952381 [2024-11-20 09:47:57,158 INFO L175 Difference]: Start difference. First operand has 196 places, 196 transitions, 2809 flow. Second operand 21 states and 181 transitions. [2024-11-20 09:47:57,158 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 216 places, 348 transitions, 5351 flow [2024-11-20 09:47:57,235 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 208 places, 348 transitions, 5085 flow, removed 120 selfloop flow, removed 8 redundant places. [2024-11-20 09:47:57,240 INFO L231 Difference]: Finished difference. Result has 221 places, 272 transitions, 4346 flow [2024-11-20 09:47:57,240 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=2631, PETRI_DIFFERENCE_MINUEND_PLACES=188, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=196, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=103, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=76, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=4346, PETRI_PLACES=221, PETRI_TRANSITIONS=272} [2024-11-20 09:47:57,241 INFO L277 CegarLoopForPetriNet]: 21 programPoint places, 200 predicate places. [2024-11-20 09:47:57,241 INFO L471 AbstractCegarLoop]: Abstraction has has 221 places, 272 transitions, 4346 flow [2024-11-20 09:47:57,241 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 5.0) internal successors, (65), 13 states have internal predecessors, (65), 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 09:47:57,241 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 09:47:57,241 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-20 09:47:57,247 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2024-11-20 09:47:57,441 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 09:47:57,442 INFO L396 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-20 09:47:57,442 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 09:47:57,442 INFO L85 PathProgramCache]: Analyzing trace with hash -1490242104, now seen corresponding path program 4 times [2024-11-20 09:47:57,442 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 09:47:57,442 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1549776200] [2024-11-20 09:47:57,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 09:47:57,442 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 09:47:57,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 09:47:57,622 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-20 09:47:57,622 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 09:47:57,622 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1549776200] [2024-11-20 09:47:57,622 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1549776200] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-20 09:47:57,622 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [806645342] [2024-11-20 09:47:57,622 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-20 09:47:57,622 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 09:47:57,623 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-20 09:47:57,626 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 09:47:57,628 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 09:47:57,726 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-20 09:47:57,726 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-20 09:47:57,727 INFO L255 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-11-20 09:47:57,728 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-20 09:47:57,780 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-20 09:47:57,780 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-20 09:47:57,837 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-20 09:47:57,837 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [806645342] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-20 09:47:57,837 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-20 09:47:57,837 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 13 [2024-11-20 09:47:57,837 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1243735403] [2024-11-20 09:47:57,837 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-20 09:47:57,837 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-11-20 09:47:57,838 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 09:47:57,838 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-11-20 09:47:57,838 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2024-11-20 09:47:57,838 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 20 [2024-11-20 09:47:57,838 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 221 places, 272 transitions, 4346 flow. Second operand has 13 states, 13 states have (on average 4.846153846153846) internal successors, (63), 13 states have internal predecessors, (63), 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 09:47:57,838 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 09:47:57,838 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 20 [2024-11-20 09:47:57,838 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 09:47:58,448 INFO L124 PetriNetUnfolderBase]: 741/1573 cut-off events. [2024-11-20 09:47:58,449 INFO L125 PetriNetUnfolderBase]: For 21066/21066 co-relation queries the response was YES. [2024-11-20 09:47:58,457 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11475 conditions, 1573 events. 741/1573 cut-off events. For 21066/21066 co-relation queries the response was YES. Maximal size of possible extension queue 147. Compared 10149 event pairs, 43 based on Foata normal form. 8/1581 useless extension candidates. Maximal degree in co-relation 11356. Up to 422 conditions per place. [2024-11-20 09:47:58,463 INFO L140 encePairwiseOnDemand]: 13/20 looper letters, 175 selfloop transitions, 168 changer transitions 0/344 dead transitions. [2024-11-20 09:47:58,463 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 236 places, 344 transitions, 5871 flow [2024-11-20 09:47:58,463 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-11-20 09:47:58,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2024-11-20 09:47:58,464 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 159 transitions. [2024-11-20 09:47:58,464 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4676470588235294 [2024-11-20 09:47:58,464 INFO L175 Difference]: Start difference. First operand has 221 places, 272 transitions, 4346 flow. Second operand 17 states and 159 transitions. [2024-11-20 09:47:58,464 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 236 places, 344 transitions, 5871 flow [2024-11-20 09:47:58,580 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 232 places, 344 transitions, 5498 flow, removed 149 selfloop flow, removed 4 redundant places. [2024-11-20 09:47:58,585 INFO L231 Difference]: Finished difference. Result has 235 places, 278 transitions, 4480 flow [2024-11-20 09:47:58,585 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=3972, PETRI_DIFFERENCE_MINUEND_PLACES=216, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=271, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=161, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=108, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=4480, PETRI_PLACES=235, PETRI_TRANSITIONS=278} [2024-11-20 09:47:58,586 INFO L277 CegarLoopForPetriNet]: 21 programPoint places, 214 predicate places. [2024-11-20 09:47:58,586 INFO L471 AbstractCegarLoop]: Abstraction has has 235 places, 278 transitions, 4480 flow [2024-11-20 09:47:58,586 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 4.846153846153846) internal successors, (63), 13 states have internal predecessors, (63), 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 09:47:58,586 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 09:47:58,586 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-20 09:47:58,593 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 09:47:58,786 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 09:47:58,786 INFO L396 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-20 09:47:58,787 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 09:47:58,787 INFO L85 PathProgramCache]: Analyzing trace with hash -1490836750, now seen corresponding path program 5 times [2024-11-20 09:47:58,787 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 09:47:58,787 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [943650203] [2024-11-20 09:47:58,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 09:47:58,787 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 09:47:58,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 09:47:58,921 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-20 09:47:58,921 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 09:47:58,921 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [943650203] [2024-11-20 09:47:58,921 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [943650203] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-20 09:47:58,921 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1143970729] [2024-11-20 09:47:58,921 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-20 09:47:58,921 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 09:47:58,922 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-20 09:47:58,923 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 09:47:58,925 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 09:47:59,004 INFO L227 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-20 09:47:59,005 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-20 09:47:59,007 INFO L255 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-11-20 09:47:59,010 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-20 09:47:59,059 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-20 09:47:59,059 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-20 09:47:59,168 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-20 09:47:59,168 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1143970729] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-20 09:47:59,168 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-20 09:47:59,168 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2024-11-20 09:47:59,168 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [67146455] [2024-11-20 09:47:59,169 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-20 09:47:59,169 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-11-20 09:47:59,169 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 09:47:59,169 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-11-20 09:47:59,169 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2024-11-20 09:47:59,169 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 20 [2024-11-20 09:47:59,169 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 235 places, 278 transitions, 4480 flow. Second operand has 12 states, 12 states have (on average 5.0) internal successors, (60), 12 states have internal predecessors, (60), 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 09:47:59,169 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 09:47:59,169 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 20 [2024-11-20 09:47:59,169 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 09:47:59,839 INFO L124 PetriNetUnfolderBase]: 739/1559 cut-off events. [2024-11-20 09:47:59,839 INFO L125 PetriNetUnfolderBase]: For 20567/20567 co-relation queries the response was YES. [2024-11-20 09:47:59,847 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11449 conditions, 1559 events. 739/1559 cut-off events. For 20567/20567 co-relation queries the response was YES. Maximal size of possible extension queue 145. Compared 9997 event pairs, 42 based on Foata normal form. 4/1563 useless extension candidates. Maximal degree in co-relation 11326. Up to 520 conditions per place. [2024-11-20 09:47:59,852 INFO L140 encePairwiseOnDemand]: 14/20 looper letters, 185 selfloop transitions, 158 changer transitions 0/344 dead transitions. [2024-11-20 09:47:59,852 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 249 places, 344 transitions, 5942 flow [2024-11-20 09:47:59,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-11-20 09:47:59,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2024-11-20 09:47:59,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 146 transitions. [2024-11-20 09:47:59,853 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.45625 [2024-11-20 09:47:59,853 INFO L175 Difference]: Start difference. First operand has 235 places, 278 transitions, 4480 flow. Second operand 16 states and 146 transitions. [2024-11-20 09:47:59,853 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 249 places, 344 transitions, 5942 flow [2024-11-20 09:47:59,949 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 238 places, 344 transitions, 5688 flow, removed 34 selfloop flow, removed 11 redundant places. [2024-11-20 09:47:59,954 INFO L231 Difference]: Finished difference. Result has 239 places, 286 transitions, 4722 flow [2024-11-20 09:47:59,954 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=4216, PETRI_DIFFERENCE_MINUEND_PLACES=223, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=276, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=148, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=123, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=4722, PETRI_PLACES=239, PETRI_TRANSITIONS=286} [2024-11-20 09:47:59,954 INFO L277 CegarLoopForPetriNet]: 21 programPoint places, 218 predicate places. [2024-11-20 09:47:59,954 INFO L471 AbstractCegarLoop]: Abstraction has has 239 places, 286 transitions, 4722 flow [2024-11-20 09:47:59,955 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 5.0) internal successors, (60), 12 states have internal predecessors, (60), 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 09:47:59,955 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 09:47:59,955 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-20 09:47:59,962 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2024-11-20 09:48:00,155 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2024-11-20 09:48:00,155 INFO L396 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-20 09:48:00,156 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 09:48:00,156 INFO L85 PathProgramCache]: Analyzing trace with hash 2048302352, now seen corresponding path program 6 times [2024-11-20 09:48:00,156 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 09:48:00,156 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [872584085] [2024-11-20 09:48:00,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 09:48:00,156 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 09:48:00,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 09:48:00,249 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-20 09:48:00,249 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 09:48:00,249 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [872584085] [2024-11-20 09:48:00,250 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [872584085] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-20 09:48:00,250 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2093217368] [2024-11-20 09:48:00,250 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-20 09:48:00,250 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 09:48:00,250 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-20 09:48:00,252 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 09:48:00,256 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 09:48:00,349 INFO L227 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2024-11-20 09:48:00,350 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-20 09:48:00,351 INFO L255 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-11-20 09:48:00,351 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-20 09:48:00,381 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-20 09:48:00,381 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-20 09:48:00,484 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-20 09:48:00,485 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2093217368] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-20 09:48:00,485 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-20 09:48:00,485 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 11 [2024-11-20 09:48:00,485 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1622879571] [2024-11-20 09:48:00,485 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-20 09:48:00,485 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-11-20 09:48:00,485 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 09:48:00,485 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-11-20 09:48:00,485 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2024-11-20 09:48:00,486 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 20 [2024-11-20 09:48:00,486 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 239 places, 286 transitions, 4722 flow. Second operand has 11 states, 11 states have (on average 5.090909090909091) internal successors, (56), 11 states have internal predecessors, (56), 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 09:48:00,486 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 09:48:00,486 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 20 [2024-11-20 09:48:00,486 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 09:48:01,730 INFO L124 PetriNetUnfolderBase]: 728/1539 cut-off events. [2024-11-20 09:48:01,730 INFO L125 PetriNetUnfolderBase]: For 21051/21051 co-relation queries the response was YES. [2024-11-20 09:48:01,739 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11425 conditions, 1539 events. 728/1539 cut-off events. For 21051/21051 co-relation queries the response was YES. Maximal size of possible extension queue 143. Compared 9848 event pairs, 105 based on Foata normal form. 18/1557 useless extension candidates. Maximal degree in co-relation 11304. Up to 527 conditions per place. [2024-11-20 09:48:01,744 INFO L140 encePairwiseOnDemand]: 14/20 looper letters, 191 selfloop transitions, 144 changer transitions 0/336 dead transitions. [2024-11-20 09:48:01,744 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 254 places, 336 transitions, 5909 flow [2024-11-20 09:48:01,744 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-11-20 09:48:01,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2024-11-20 09:48:01,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 132 transitions. [2024-11-20 09:48:01,745 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4125 [2024-11-20 09:48:01,745 INFO L175 Difference]: Start difference. First operand has 239 places, 286 transitions, 4722 flow. Second operand 16 states and 132 transitions. [2024-11-20 09:48:01,745 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 254 places, 336 transitions, 5909 flow [2024-11-20 09:48:01,847 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 247 places, 336 transitions, 5696 flow, removed 55 selfloop flow, removed 7 redundant places. [2024-11-20 09:48:01,852 INFO L231 Difference]: Finished difference. Result has 249 places, 297 transitions, 5014 flow [2024-11-20 09:48:01,852 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=4500, PETRI_DIFFERENCE_MINUEND_PLACES=232, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=284, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=132, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=148, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=5014, PETRI_PLACES=249, PETRI_TRANSITIONS=297} [2024-11-20 09:48:01,852 INFO L277 CegarLoopForPetriNet]: 21 programPoint places, 228 predicate places. [2024-11-20 09:48:01,853 INFO L471 AbstractCegarLoop]: Abstraction has has 249 places, 297 transitions, 5014 flow [2024-11-20 09:48:01,853 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 5.090909090909091) internal successors, (56), 11 states have internal predecessors, (56), 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 09:48:01,853 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 09:48:01,853 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-20 09:48:01,859 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2024-11-20 09:48:02,053 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 09:48:02,053 INFO L396 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-20 09:48:02,054 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 09:48:02,054 INFO L85 PathProgramCache]: Analyzing trace with hash -616501424, now seen corresponding path program 7 times [2024-11-20 09:48:02,054 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 09:48:02,054 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [282287525] [2024-11-20 09:48:02,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 09:48:02,054 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 09:48:02,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 09:48:02,165 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-20 09:48:02,165 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 09:48:02,166 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [282287525] [2024-11-20 09:48:02,166 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [282287525] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-20 09:48:02,166 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1150597947] [2024-11-20 09:48:02,166 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-20 09:48:02,166 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 09:48:02,166 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-20 09:48:02,168 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-20 09:48:02,169 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2024-11-20 09:48:02,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 09:48:02,252 INFO L255 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-11-20 09:48:02,253 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-20 09:48:02,280 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-20 09:48:02,280 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-20 09:48:02,356 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-20 09:48:02,356 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1150597947] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-20 09:48:02,356 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-20 09:48:02,356 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2024-11-20 09:48:02,357 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [882310841] [2024-11-20 09:48:02,357 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-20 09:48:02,357 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-11-20 09:48:02,357 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 09:48:02,357 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-11-20 09:48:02,357 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2024-11-20 09:48:02,358 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 20 [2024-11-20 09:48:02,358 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 249 places, 297 transitions, 5014 flow. Second operand has 12 states, 12 states have (on average 4.916666666666667) internal successors, (59), 12 states have internal predecessors, (59), 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 09:48:02,358 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 09:48:02,358 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 20 [2024-11-20 09:48:02,358 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 09:48:03,142 INFO L124 PetriNetUnfolderBase]: 811/1671 cut-off events. [2024-11-20 09:48:03,142 INFO L125 PetriNetUnfolderBase]: For 24732/24732 co-relation queries the response was YES. [2024-11-20 09:48:03,152 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12682 conditions, 1671 events. 811/1671 cut-off events. For 24732/24732 co-relation queries the response was YES. Maximal size of possible extension queue 152. Compared 10668 event pairs, 177 based on Foata normal form. 14/1685 useless extension candidates. Maximal degree in co-relation 12558. Up to 966 conditions per place. [2024-11-20 09:48:03,157 INFO L140 encePairwiseOnDemand]: 14/20 looper letters, 214 selfloop transitions, 161 changer transitions 0/376 dead transitions. [2024-11-20 09:48:03,157 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 264 places, 376 transitions, 6640 flow [2024-11-20 09:48:03,157 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-11-20 09:48:03,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2024-11-20 09:48:03,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 145 transitions. [2024-11-20 09:48:03,158 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.453125 [2024-11-20 09:48:03,158 INFO L175 Difference]: Start difference. First operand has 249 places, 297 transitions, 5014 flow. Second operand 16 states and 145 transitions. [2024-11-20 09:48:03,158 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 264 places, 376 transitions, 6640 flow [2024-11-20 09:48:03,271 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 255 places, 376 transitions, 6356 flow, removed 52 selfloop flow, removed 9 redundant places. [2024-11-20 09:48:03,276 INFO L231 Difference]: Finished difference. Result has 261 places, 332 transitions, 5804 flow [2024-11-20 09:48:03,276 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=4752, PETRI_DIFFERENCE_MINUEND_PLACES=240, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=297, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=132, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=147, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=5804, PETRI_PLACES=261, PETRI_TRANSITIONS=332} [2024-11-20 09:48:03,277 INFO L277 CegarLoopForPetriNet]: 21 programPoint places, 240 predicate places. [2024-11-20 09:48:03,277 INFO L471 AbstractCegarLoop]: Abstraction has has 261 places, 332 transitions, 5804 flow [2024-11-20 09:48:03,277 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 4.916666666666667) internal successors, (59), 12 states have internal predecessors, (59), 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 09:48:03,277 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 09:48:03,277 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-20 09:48:03,284 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2024-11-20 09:48:03,477 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 09:48:03,478 INFO L396 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-20 09:48:03,479 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 09:48:03,479 INFO L85 PathProgramCache]: Analyzing trace with hash -695149664, now seen corresponding path program 8 times [2024-11-20 09:48:03,479 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 09:48:03,479 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1500064809] [2024-11-20 09:48:03,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 09:48:03,479 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 09:48:03,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 09:48:03,573 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-20 09:48:03,573 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 09:48:03,573 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1500064809] [2024-11-20 09:48:03,573 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1500064809] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-20 09:48:03,573 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1436017917] [2024-11-20 09:48:03,573 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-20 09:48:03,574 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 09:48:03,574 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-20 09:48:03,576 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-20 09:48:03,577 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2024-11-20 09:48:03,661 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-20 09:48:03,662 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-20 09:48:03,662 INFO L255 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-11-20 09:48:03,663 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-20 09:48:03,691 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-20 09:48:03,691 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-20 09:48:03,772 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-20 09:48:03,772 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1436017917] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-20 09:48:03,772 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-20 09:48:03,772 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2024-11-20 09:48:03,772 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [84281978] [2024-11-20 09:48:03,772 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-20 09:48:03,773 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-11-20 09:48:03,773 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 09:48:03,773 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-11-20 09:48:03,773 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2024-11-20 09:48:03,773 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 20 [2024-11-20 09:48:03,773 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 261 places, 332 transitions, 5804 flow. Second operand has 12 states, 12 states have (on average 5.083333333333333) internal successors, (61), 12 states have internal predecessors, (61), 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 09:48:03,773 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 09:48:03,773 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 20 [2024-11-20 09:48:03,773 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 09:48:04,794 INFO L124 PetriNetUnfolderBase]: 797/1641 cut-off events. [2024-11-20 09:48:04,794 INFO L125 PetriNetUnfolderBase]: For 26177/26177 co-relation queries the response was YES. [2024-11-20 09:48:04,806 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12801 conditions, 1641 events. 797/1641 cut-off events. For 26177/26177 co-relation queries the response was YES. Maximal size of possible extension queue 150. Compared 10402 event pairs, 183 based on Foata normal form. 18/1659 useless extension candidates. Maximal degree in co-relation 12671. Up to 993 conditions per place. [2024-11-20 09:48:04,812 INFO L140 encePairwiseOnDemand]: 14/20 looper letters, 213 selfloop transitions, 154 changer transitions 0/368 dead transitions. [2024-11-20 09:48:04,812 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 277 places, 368 transitions, 6753 flow [2024-11-20 09:48:04,813 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-11-20 09:48:04,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2024-11-20 09:48:04,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 141 transitions. [2024-11-20 09:48:04,813 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4147058823529412 [2024-11-20 09:48:04,813 INFO L175 Difference]: Start difference. First operand has 261 places, 332 transitions, 5804 flow. Second operand 17 states and 141 transitions. [2024-11-20 09:48:04,813 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 277 places, 368 transitions, 6753 flow [2024-11-20 09:48:04,951 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 271 places, 368 transitions, 6573 flow, removed 48 selfloop flow, removed 6 redundant places. [2024-11-20 09:48:04,957 INFO L231 Difference]: Finished difference. Result has 273 places, 333 transitions, 6008 flow [2024-11-20 09:48:04,957 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=5512, PETRI_DIFFERENCE_MINUEND_PLACES=255, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=326, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=148, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=174, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=6008, PETRI_PLACES=273, PETRI_TRANSITIONS=333} [2024-11-20 09:48:04,957 INFO L277 CegarLoopForPetriNet]: 21 programPoint places, 252 predicate places. [2024-11-20 09:48:04,957 INFO L471 AbstractCegarLoop]: Abstraction has has 273 places, 333 transitions, 6008 flow [2024-11-20 09:48:04,957 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 5.083333333333333) internal successors, (61), 12 states have internal predecessors, (61), 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 09:48:04,957 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 09:48:04,957 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-20 09:48:04,965 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2024-11-20 09:48:05,158 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 09:48:05,158 INFO L396 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-20 09:48:05,158 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 09:48:05,158 INFO L85 PathProgramCache]: Analyzing trace with hash 1675124684, now seen corresponding path program 1 times [2024-11-20 09:48:05,158 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 09:48:05,159 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [246162445] [2024-11-20 09:48:05,159 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 09:48:05,159 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 09:48:05,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 09:48:05,321 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-20 09:48:05,321 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 09:48:05,321 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [246162445] [2024-11-20 09:48:05,321 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [246162445] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-20 09:48:05,321 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [27608492] [2024-11-20 09:48:05,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 09:48:05,322 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 09:48:05,322 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-20 09:48:05,324 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-20 09:48:05,325 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2024-11-20 09:48:05,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 09:48:05,400 INFO L255 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 29 conjuncts are in the unsatisfiable core [2024-11-20 09:48:05,401 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-20 09:48:05,426 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-11-20 09:48:05,655 INFO L349 Elim1Store]: treesize reduction 120, result has 9.8 percent of original size [2024-11-20 09:48:05,656 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 9 new quantified variables, introduced 15 case distinctions, treesize of input 254 treesize of output 157 [2024-11-20 09:48:05,720 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-20 09:48:05,720 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-20 09:48:06,336 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 283 treesize of output 249 [2024-11-20 09:48:06,554 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-20 09:48:06,555 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 13 new quantified variables, introduced 28 case distinctions, treesize of input 1437 treesize of output 1137