./Ultimate.py --spec /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/properties/unreach-call.prp --file /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/chl-array-int-symm.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 84cfde4a Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/chl-array-int-symm.wvr.c -s /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 8a0558934008acf79b7e5b205fa256c568a1b783af274566f36b253458639325 --- Real Ultimate output --- This is Ultimate 0.2.5-dev-84cfde4 [2024-10-11 14:26:00,566 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-10-11 14:26:00,612 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-10-11 14:26:00,616 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-10-11 14:26:00,617 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-10-11 14:26:00,638 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-10-11 14:26:00,640 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-10-11 14:26:00,640 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-10-11 14:26:00,641 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-10-11 14:26:00,642 INFO L153 SettingsManager]: * Use memory slicer=true [2024-10-11 14:26:00,642 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-10-11 14:26:00,642 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-10-11 14:26:00,643 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-10-11 14:26:00,643 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-10-11 14:26:00,645 INFO L153 SettingsManager]: * Use SBE=true [2024-10-11 14:26:00,646 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-10-11 14:26:00,646 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-10-11 14:26:00,646 INFO L153 SettingsManager]: * sizeof long=4 [2024-10-11 14:26:00,646 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-10-11 14:26:00,646 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-10-11 14:26:00,646 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-10-11 14:26:00,647 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-10-11 14:26:00,647 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-10-11 14:26:00,648 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-10-11 14:26:00,648 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-10-11 14:26:00,648 INFO L153 SettingsManager]: * sizeof long double=12 [2024-10-11 14:26:00,648 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-10-11 14:26:00,648 INFO L153 SettingsManager]: * Use constant arrays=true [2024-10-11 14:26:00,649 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-10-11 14:26:00,649 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-10-11 14:26:00,649 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-10-11 14:26:00,649 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-10-11 14:26:00,649 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-11 14:26:00,650 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-10-11 14:26:00,650 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-10-11 14:26:00,651 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-10-11 14:26:00,651 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-10-11 14:26:00,651 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-10-11 14:26:00,651 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-10-11 14:26:00,651 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-10-11 14:26:00,651 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-10-11 14:26:00,652 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-10-11 14:26:00,652 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 8a0558934008acf79b7e5b205fa256c568a1b783af274566f36b253458639325 [2024-10-11 14:26:00,887 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-10-11 14:26:00,904 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-10-11 14:26:00,906 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-10-11 14:26:00,907 INFO L270 PluginConnector]: Initializing CDTParser... [2024-10-11 14:26:00,907 INFO L274 PluginConnector]: CDTParser initialized [2024-10-11 14:26:00,908 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/chl-array-int-symm.wvr.c [2024-10-11 14:26:02,114 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-10-11 14:26:02,269 INFO L384 CDTParser]: Found 1 translation units. [2024-10-11 14:26:02,270 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/chl-array-int-symm.wvr.c [2024-10-11 14:26:02,277 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/data/cae6b74c3/3e9fc26888e84fe58c15f80ddf8f6be7/FLAG65b99b3b2 [2024-10-11 14:26:02,689 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/data/cae6b74c3/3e9fc26888e84fe58c15f80ddf8f6be7 [2024-10-11 14:26:02,692 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-10-11 14:26:02,693 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-10-11 14:26:02,693 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-10-11 14:26:02,693 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-10-11 14:26:02,698 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-10-11 14:26:02,699 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.10 02:26:02" (1/1) ... [2024-10-11 14:26:02,699 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5a14e00c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:26:02, skipping insertion in model container [2024-10-11 14:26:02,699 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.10 02:26:02" (1/1) ... [2024-10-11 14:26:02,717 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-10-11 14:26:02,886 WARN L248 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/chl-array-int-symm.wvr.c[2508,2521] [2024-10-11 14:26:02,900 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-11 14:26:02,907 INFO L200 MainTranslator]: Completed pre-run [2024-10-11 14:26:02,922 WARN L248 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/chl-array-int-symm.wvr.c[2508,2521] [2024-10-11 14:26:02,925 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-11 14:26:02,937 INFO L204 MainTranslator]: Completed translation [2024-10-11 14:26:02,938 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:26:02 WrapperNode [2024-10-11 14:26:02,938 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-10-11 14:26:02,939 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-10-11 14:26:02,939 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-10-11 14:26:02,939 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-10-11 14:26:02,946 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:26:02" (1/1) ... [2024-10-11 14:26:02,952 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:26:02" (1/1) ... [2024-10-11 14:26:02,972 INFO L138 Inliner]: procedures = 24, calls = 29, calls flagged for inlining = 13, calls inlined = 17, statements flattened = 193 [2024-10-11 14:26:02,972 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-10-11 14:26:02,973 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-10-11 14:26:02,973 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-10-11 14:26:02,973 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-10-11 14:26:02,982 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:26:02" (1/1) ... [2024-10-11 14:26:02,982 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:26:02" (1/1) ... [2024-10-11 14:26:02,985 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:26:02" (1/1) ... [2024-10-11 14:26:02,997 INFO L175 MemorySlicer]: Split 12 memory accesses to 2 slices as follows [2, 10]. 83 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0]. The 2 writes are split as follows [0, 2]. [2024-10-11 14:26:02,998 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:26:02" (1/1) ... [2024-10-11 14:26:02,998 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:26:02" (1/1) ... [2024-10-11 14:26:03,003 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:26:02" (1/1) ... [2024-10-11 14:26:03,006 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:26:02" (1/1) ... [2024-10-11 14:26:03,007 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:26:02" (1/1) ... [2024-10-11 14:26:03,008 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:26:02" (1/1) ... [2024-10-11 14:26:03,010 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-10-11 14:26:03,011 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-10-11 14:26:03,011 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-10-11 14:26:03,011 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-10-11 14:26:03,012 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:26:02" (1/1) ... [2024-10-11 14:26:03,019 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-11 14:26:03,027 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 14:26:03,043 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-10-11 14:26:03,048 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-10-11 14:26:03,095 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-10-11 14:26:03,095 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2024-10-11 14:26:03,095 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2024-10-11 14:26:03,095 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2024-10-11 14:26:03,095 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2024-10-11 14:26:03,096 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-10-11 14:26:03,097 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-10-11 14:26:03,100 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-10-11 14:26:03,101 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-10-11 14:26:03,102 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-10-11 14:26:03,102 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-10-11 14:26:03,102 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-10-11 14:26:03,102 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-10-11 14:26:03,102 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-10-11 14:26:03,103 WARN L207 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2024-10-11 14:26:03,231 INFO L238 CfgBuilder]: Building ICFG [2024-10-11 14:26:03,232 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-10-11 14:26:03,490 INFO L283 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2024-10-11 14:26:03,490 INFO L287 CfgBuilder]: Performing block encoding [2024-10-11 14:26:03,704 INFO L309 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-10-11 14:26:03,705 INFO L314 CfgBuilder]: Removed 4 assume(true) statements. [2024-10-11 14:26:03,706 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.10 02:26:03 BoogieIcfgContainer [2024-10-11 14:26:03,706 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-10-11 14:26:03,707 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-10-11 14:26:03,708 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-10-11 14:26:03,711 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-10-11 14:26:03,712 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 11.10 02:26:02" (1/3) ... [2024-10-11 14:26:03,712 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@62bd65fe and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.10 02:26:03, skipping insertion in model container [2024-10-11 14:26:03,713 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:26:02" (2/3) ... [2024-10-11 14:26:03,713 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@62bd65fe and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.10 02:26:03, skipping insertion in model container [2024-10-11 14:26:03,714 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.10 02:26:03" (3/3) ... [2024-10-11 14:26:03,715 INFO L112 eAbstractionObserver]: Analyzing ICFG chl-array-int-symm.wvr.c [2024-10-11 14:26:03,729 INFO L209 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-10-11 14:26:03,729 INFO L149 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-10-11 14:26:03,729 INFO L484 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-10-11 14:26:03,777 INFO L143 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2024-10-11 14:26:03,808 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 29 places, 28 transitions, 70 flow [2024-10-11 14:26:03,833 INFO L124 PetriNetUnfolderBase]: 6/26 cut-off events. [2024-10-11 14:26:03,834 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-10-11 14:26:03,836 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35 conditions, 26 events. 6/26 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 22 event pairs, 0 based on Foata normal form. 0/19 useless extension candidates. Maximal degree in co-relation 17. Up to 2 conditions per place. [2024-10-11 14:26:03,836 INFO L82 GeneralOperation]: Start removeDead. Operand has 29 places, 28 transitions, 70 flow [2024-10-11 14:26:03,839 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 26 places, 25 transitions, 62 flow [2024-10-11 14:26:03,849 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-10-11 14:26:03,856 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;@5c6d196c, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-10-11 14:26:03,856 INFO L334 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2024-10-11 14:26:03,865 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-10-11 14:26:03,866 INFO L124 PetriNetUnfolderBase]: 6/24 cut-off events. [2024-10-11 14:26:03,866 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-10-11 14:26:03,866 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 14:26:03,866 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 14:26:03,868 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-11 14:26:03,871 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 14:26:03,872 INFO L85 PathProgramCache]: Analyzing trace with hash 245197459, now seen corresponding path program 1 times [2024-10-11 14:26:03,878 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 14:26:03,878 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1677534577] [2024-10-11 14:26:03,879 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 14:26:03,879 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 14:26:04,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 14:26:04,517 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 14:26:04,517 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 14:26:04,518 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1677534577] [2024-10-11 14:26:04,518 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1677534577] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-11 14:26:04,518 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-11 14:26:04,519 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-10-11 14:26:04,520 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1974649350] [2024-10-11 14:26:04,520 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-11 14:26:04,528 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-10-11 14:26:04,532 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 14:26:04,549 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-10-11 14:26:04,550 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-10-11 14:26:04,551 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 28 [2024-10-11 14:26:04,552 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 26 places, 25 transitions, 62 flow. Second operand has 7 states, 7 states have (on average 5.285714285714286) internal successors, (37), 7 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 14:26:04,552 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 14:26:04,552 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 28 [2024-10-11 14:26:04,553 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 14:26:04,811 INFO L124 PetriNetUnfolderBase]: 288/485 cut-off events. [2024-10-11 14:26:04,811 INFO L125 PetriNetUnfolderBase]: For 48/48 co-relation queries the response was YES. [2024-10-11 14:26:04,815 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1020 conditions, 485 events. 288/485 cut-off events. For 48/48 co-relation queries the response was YES. Maximal size of possible extension queue 36. Compared 1769 event pairs, 96 based on Foata normal form. 1/372 useless extension candidates. Maximal degree in co-relation 536. Up to 178 conditions per place. [2024-10-11 14:26:04,820 INFO L140 encePairwiseOnDemand]: 18/28 looper letters, 64 selfloop transitions, 10 changer transitions 1/76 dead transitions. [2024-10-11 14:26:04,820 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 33 places, 76 transitions, 344 flow [2024-10-11 14:26:04,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-10-11 14:26:04,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-10-11 14:26:04,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 100 transitions. [2024-10-11 14:26:04,832 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.44642857142857145 [2024-10-11 14:26:04,833 INFO L175 Difference]: Start difference. First operand has 26 places, 25 transitions, 62 flow. Second operand 8 states and 100 transitions. [2024-10-11 14:26:04,834 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 33 places, 76 transitions, 344 flow [2024-10-11 14:26:04,837 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 29 places, 76 transitions, 316 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-10-11 14:26:04,841 INFO L231 Difference]: Finished difference. Result has 33 places, 34 transitions, 123 flow [2024-10-11 14:26:04,843 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=54, PETRI_DIFFERENCE_MINUEND_PLACES=22, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=25, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=16, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=123, PETRI_PLACES=33, PETRI_TRANSITIONS=34} [2024-10-11 14:26:04,847 INFO L277 CegarLoopForPetriNet]: 26 programPoint places, 7 predicate places. [2024-10-11 14:26:04,847 INFO L471 AbstractCegarLoop]: Abstraction has has 33 places, 34 transitions, 123 flow [2024-10-11 14:26:04,847 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 5.285714285714286) internal successors, (37), 7 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 14:26:04,848 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 14:26:04,848 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 14:26:04,848 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-10-11 14:26:04,849 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-11 14:26:04,849 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 14:26:04,849 INFO L85 PathProgramCache]: Analyzing trace with hash 1983090722, now seen corresponding path program 1 times [2024-10-11 14:26:04,850 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 14:26:04,850 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [616387080] [2024-10-11 14:26:04,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 14:26:04,850 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 14:26:04,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 14:26:05,036 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 14:26:05,037 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 14:26:05,038 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [616387080] [2024-10-11 14:26:05,038 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [616387080] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-11 14:26:05,038 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [674349927] [2024-10-11 14:26:05,038 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 14:26:05,038 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 14:26:05,038 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 14:26:05,041 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-11 14:26:05,042 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-10-11 14:26:05,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 14:26:05,118 INFO L255 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 11 conjuncts are in the unsatisfiable core [2024-10-11 14:26:05,122 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 14:26:05,257 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 14:26:05,257 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-11 14:26:05,363 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 14:26:05,364 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [674349927] provided 1 perfect and 1 imperfect interpolant sequences [2024-10-11 14:26:05,364 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-10-11 14:26:05,365 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7, 7] total 13 [2024-10-11 14:26:05,365 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [135039097] [2024-10-11 14:26:05,366 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-11 14:26:05,366 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-10-11 14:26:05,367 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 14:26:05,367 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-10-11 14:26:05,368 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2024-10-11 14:26:05,368 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 28 [2024-10-11 14:26:05,369 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 33 places, 34 transitions, 123 flow. Second operand has 8 states, 8 states have (on average 5.125) internal successors, (41), 8 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 14:26:05,369 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 14:26:05,369 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 28 [2024-10-11 14:26:05,369 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 14:26:05,610 INFO L124 PetriNetUnfolderBase]: 617/1023 cut-off events. [2024-10-11 14:26:05,610 INFO L125 PetriNetUnfolderBase]: For 157/157 co-relation queries the response was YES. [2024-10-11 14:26:05,612 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2368 conditions, 1023 events. 617/1023 cut-off events. For 157/157 co-relation queries the response was YES. Maximal size of possible extension queue 72. Compared 4490 event pairs, 279 based on Foata normal form. 1/897 useless extension candidates. Maximal degree in co-relation 1517. Up to 479 conditions per place. [2024-10-11 14:26:05,616 INFO L140 encePairwiseOnDemand]: 18/28 looper letters, 92 selfloop transitions, 12 changer transitions 1/106 dead transitions. [2024-10-11 14:26:05,616 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 40 places, 106 transitions, 540 flow [2024-10-11 14:26:05,617 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-10-11 14:26:05,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-10-11 14:26:05,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 119 transitions. [2024-10-11 14:26:05,618 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.53125 [2024-10-11 14:26:05,618 INFO L175 Difference]: Start difference. First operand has 33 places, 34 transitions, 123 flow. Second operand 8 states and 119 transitions. [2024-10-11 14:26:05,618 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 40 places, 106 transitions, 540 flow [2024-10-11 14:26:05,622 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 40 places, 106 transitions, 536 flow, removed 2 selfloop flow, removed 0 redundant places. [2024-10-11 14:26:05,625 INFO L231 Difference]: Finished difference. Result has 44 places, 42 transitions, 210 flow [2024-10-11 14:26:05,625 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=119, PETRI_DIFFERENCE_MINUEND_PLACES=33, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=34, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=210, PETRI_PLACES=44, PETRI_TRANSITIONS=42} [2024-10-11 14:26:05,626 INFO L277 CegarLoopForPetriNet]: 26 programPoint places, 18 predicate places. [2024-10-11 14:26:05,627 INFO L471 AbstractCegarLoop]: Abstraction has has 44 places, 42 transitions, 210 flow [2024-10-11 14:26:05,627 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 5.125) internal successors, (41), 8 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 14:26:05,627 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 14:26:05,627 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 14:26:05,640 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-10-11 14:26:05,830 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 14:26:05,831 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-11 14:26:05,831 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 14:26:05,831 INFO L85 PathProgramCache]: Analyzing trace with hash 1744370288, now seen corresponding path program 1 times [2024-10-11 14:26:05,831 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 14:26:05,831 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [895682649] [2024-10-11 14:26:05,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 14:26:05,832 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 14:26:05,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 14:26:05,917 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 14:26:05,917 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 14:26:05,917 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [895682649] [2024-10-11 14:26:05,918 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [895682649] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-11 14:26:05,918 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-11 14:26:05,918 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-10-11 14:26:05,918 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [782371284] [2024-10-11 14:26:05,918 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-11 14:26:05,918 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-10-11 14:26:05,918 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 14:26:05,919 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-10-11 14:26:05,919 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-10-11 14:26:05,919 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 28 [2024-10-11 14:26:05,919 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 42 transitions, 210 flow. Second operand has 5 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 14:26:05,919 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 14:26:05,919 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 28 [2024-10-11 14:26:05,919 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 14:26:06,061 INFO L124 PetriNetUnfolderBase]: 487/833 cut-off events. [2024-10-11 14:26:06,063 INFO L125 PetriNetUnfolderBase]: For 570/570 co-relation queries the response was YES. [2024-10-11 14:26:06,065 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2174 conditions, 833 events. 487/833 cut-off events. For 570/570 co-relation queries the response was YES. Maximal size of possible extension queue 60. Compared 3707 event pairs, 199 based on Foata normal form. 0/745 useless extension candidates. Maximal degree in co-relation 1625. Up to 539 conditions per place. [2024-10-11 14:26:06,067 INFO L140 encePairwiseOnDemand]: 21/28 looper letters, 62 selfloop transitions, 7 changer transitions 0/70 dead transitions. [2024-10-11 14:26:06,067 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 70 transitions, 447 flow [2024-10-11 14:26:06,068 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-10-11 14:26:06,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-10-11 14:26:06,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 74 transitions. [2024-10-11 14:26:06,070 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.44047619047619047 [2024-10-11 14:26:06,070 INFO L175 Difference]: Start difference. First operand has 44 places, 42 transitions, 210 flow. Second operand 6 states and 74 transitions. [2024-10-11 14:26:06,070 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 70 transitions, 447 flow [2024-10-11 14:26:06,074 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 70 transitions, 420 flow, removed 8 selfloop flow, removed 3 redundant places. [2024-10-11 14:26:06,075 INFO L231 Difference]: Finished difference. Result has 47 places, 42 transitions, 214 flow [2024-10-11 14:26:06,076 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=176, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=214, PETRI_PLACES=47, PETRI_TRANSITIONS=42} [2024-10-11 14:26:06,076 INFO L277 CegarLoopForPetriNet]: 26 programPoint places, 21 predicate places. [2024-10-11 14:26:06,077 INFO L471 AbstractCegarLoop]: Abstraction has has 47 places, 42 transitions, 214 flow [2024-10-11 14:26:06,077 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 14:26:06,077 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 14:26:06,077 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 14:26:06,077 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-10-11 14:26:06,078 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-11 14:26:06,078 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 14:26:06,078 INFO L85 PathProgramCache]: Analyzing trace with hash 574455480, now seen corresponding path program 1 times [2024-10-11 14:26:06,079 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 14:26:06,079 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2075613432] [2024-10-11 14:26:06,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 14:26:06,081 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 14:26:06,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 14:26:06,159 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 14:26:06,159 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 14:26:06,160 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2075613432] [2024-10-11 14:26:06,160 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2075613432] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-11 14:26:06,160 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-11 14:26:06,160 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-10-11 14:26:06,161 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [735257334] [2024-10-11 14:26:06,161 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-11 14:26:06,161 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-10-11 14:26:06,162 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 14:26:06,162 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-10-11 14:26:06,163 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-10-11 14:26:06,163 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 28 [2024-10-11 14:26:06,163 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 42 transitions, 214 flow. Second operand has 5 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 14:26:06,163 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 14:26:06,163 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 28 [2024-10-11 14:26:06,163 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 14:26:06,283 INFO L124 PetriNetUnfolderBase]: 416/723 cut-off events. [2024-10-11 14:26:06,283 INFO L125 PetriNetUnfolderBase]: For 584/584 co-relation queries the response was YES. [2024-10-11 14:26:06,285 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1918 conditions, 723 events. 416/723 cut-off events. For 584/584 co-relation queries the response was YES. Maximal size of possible extension queue 51. Compared 3036 event pairs, 207 based on Foata normal form. 0/685 useless extension candidates. Maximal degree in co-relation 1535. Up to 539 conditions per place. [2024-10-11 14:26:06,287 INFO L140 encePairwiseOnDemand]: 21/28 looper letters, 52 selfloop transitions, 6 changer transitions 2/61 dead transitions. [2024-10-11 14:26:06,287 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 51 places, 61 transitions, 400 flow [2024-10-11 14:26:06,287 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-10-11 14:26:06,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-10-11 14:26:06,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 67 transitions. [2024-10-11 14:26:06,288 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.39880952380952384 [2024-10-11 14:26:06,288 INFO L175 Difference]: Start difference. First operand has 47 places, 42 transitions, 214 flow. Second operand 6 states and 67 transitions. [2024-10-11 14:26:06,288 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 51 places, 61 transitions, 400 flow [2024-10-11 14:26:06,293 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 48 places, 61 transitions, 384 flow, removed 4 selfloop flow, removed 3 redundant places. [2024-10-11 14:26:06,301 INFO L231 Difference]: Finished difference. Result has 50 places, 42 transitions, 220 flow [2024-10-11 14:26:06,302 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=195, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=220, PETRI_PLACES=50, PETRI_TRANSITIONS=42} [2024-10-11 14:26:06,303 INFO L277 CegarLoopForPetriNet]: 26 programPoint places, 24 predicate places. [2024-10-11 14:26:06,303 INFO L471 AbstractCegarLoop]: Abstraction has has 50 places, 42 transitions, 220 flow [2024-10-11 14:26:06,303 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 14:26:06,303 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 14:26:06,303 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 14:26:06,304 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-10-11 14:26:06,304 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-11 14:26:06,304 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 14:26:06,304 INFO L85 PathProgramCache]: Analyzing trace with hash 603243545, now seen corresponding path program 1 times [2024-10-11 14:26:06,304 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 14:26:06,305 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1155448314] [2024-10-11 14:26:06,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 14:26:06,305 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 14:26:06,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 14:26:06,431 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 14:26:06,432 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 14:26:06,432 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1155448314] [2024-10-11 14:26:06,432 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1155448314] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-11 14:26:06,432 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1981199323] [2024-10-11 14:26:06,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 14:26:06,433 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 14:26:06,433 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 14:26:06,437 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-11 14:26:06,438 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-10-11 14:26:06,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 14:26:06,495 INFO L255 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 12 conjuncts are in the unsatisfiable core [2024-10-11 14:26:06,496 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 14:26:06,607 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 14:26:06,607 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-11 14:26:06,675 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 14:26:06,676 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1981199323] provided 1 perfect and 1 imperfect interpolant sequences [2024-10-11 14:26:06,676 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-10-11 14:26:06,676 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [7, 6] total 14 [2024-10-11 14:26:06,676 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [719094301] [2024-10-11 14:26:06,676 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-11 14:26:06,677 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-10-11 14:26:06,677 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 14:26:06,677 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-10-11 14:26:06,677 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2024-10-11 14:26:06,678 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 28 [2024-10-11 14:26:06,678 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 42 transitions, 220 flow. Second operand has 7 states, 7 states have (on average 5.428571428571429) internal successors, (38), 7 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 14:26:06,678 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 14:26:06,678 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 28 [2024-10-11 14:26:06,678 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 14:26:06,852 INFO L124 PetriNetUnfolderBase]: 391/674 cut-off events. [2024-10-11 14:26:06,853 INFO L125 PetriNetUnfolderBase]: For 507/507 co-relation queries the response was YES. [2024-10-11 14:26:06,854 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1792 conditions, 674 events. 391/674 cut-off events. For 507/507 co-relation queries the response was YES. Maximal size of possible extension queue 53. Compared 2835 event pairs, 192 based on Foata normal form. 1/673 useless extension candidates. Maximal degree in co-relation 1757. Up to 539 conditions per place. [2024-10-11 14:26:06,868 INFO L140 encePairwiseOnDemand]: 21/28 looper letters, 50 selfloop transitions, 5 changer transitions 11/67 dead transitions. [2024-10-11 14:26:06,869 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 67 transitions, 421 flow [2024-10-11 14:26:06,869 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-10-11 14:26:06,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-10-11 14:26:06,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 77 transitions. [2024-10-11 14:26:06,870 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.39285714285714285 [2024-10-11 14:26:06,870 INFO L175 Difference]: Start difference. First operand has 50 places, 42 transitions, 220 flow. Second operand 7 states and 77 transitions. [2024-10-11 14:26:06,870 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 67 transitions, 421 flow [2024-10-11 14:26:06,871 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 67 transitions, 408 flow, removed 3 selfloop flow, removed 4 redundant places. [2024-10-11 14:26:06,872 INFO L231 Difference]: Finished difference. Result has 52 places, 40 transitions, 205 flow [2024-10-11 14:26:06,872 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=209, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=205, PETRI_PLACES=52, PETRI_TRANSITIONS=40} [2024-10-11 14:26:06,873 INFO L277 CegarLoopForPetriNet]: 26 programPoint places, 26 predicate places. [2024-10-11 14:26:06,873 INFO L471 AbstractCegarLoop]: Abstraction has has 52 places, 40 transitions, 205 flow [2024-10-11 14:26:06,873 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 5.428571428571429) internal successors, (38), 7 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 14:26:06,873 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 14:26:06,873 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 14:26:06,886 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2024-10-11 14:26:07,077 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 14:26:07,078 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-11 14:26:07,078 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 14:26:07,079 INFO L85 PathProgramCache]: Analyzing trace with hash -915834458, now seen corresponding path program 2 times [2024-10-11 14:26:07,079 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 14:26:07,079 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1105421767] [2024-10-11 14:26:07,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 14:26:07,079 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 14:26:07,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 14:26:07,208 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 14:26:07,208 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 14:26:07,209 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1105421767] [2024-10-11 14:26:07,209 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1105421767] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-11 14:26:07,209 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1982331297] [2024-10-11 14:26:07,209 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-11 14:26:07,209 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 14:26:07,209 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 14:26:07,212 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-11 14:26:07,214 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-10-11 14:26:07,270 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2024-10-11 14:26:07,271 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-11 14:26:07,272 INFO L255 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 13 conjuncts are in the unsatisfiable core [2024-10-11 14:26:07,273 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 14:26:07,363 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-11 14:26:07,364 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-10-11 14:26:07,364 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1982331297] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-11 14:26:07,364 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-10-11 14:26:07,365 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [7] total 12 [2024-10-11 14:26:07,365 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [625043595] [2024-10-11 14:26:07,365 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-11 14:26:07,365 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-10-11 14:26:07,365 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 14:26:07,366 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-10-11 14:26:07,366 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2024-10-11 14:26:07,366 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 28 [2024-10-11 14:26:07,366 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 40 transitions, 205 flow. Second operand has 7 states, 7 states have (on average 5.428571428571429) internal successors, (38), 7 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 14:26:07,366 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 14:26:07,367 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 28 [2024-10-11 14:26:07,367 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 14:26:07,555 INFO L124 PetriNetUnfolderBase]: 388/672 cut-off events. [2024-10-11 14:26:07,555 INFO L125 PetriNetUnfolderBase]: For 456/456 co-relation queries the response was YES. [2024-10-11 14:26:07,557 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1777 conditions, 672 events. 388/672 cut-off events. For 456/456 co-relation queries the response was YES. Maximal size of possible extension queue 52. Compared 2805 event pairs, 61 based on Foata normal form. 1/671 useless extension candidates. Maximal degree in co-relation 1737. Up to 232 conditions per place. [2024-10-11 14:26:07,559 INFO L140 encePairwiseOnDemand]: 19/28 looper letters, 67 selfloop transitions, 18 changer transitions 1/87 dead transitions. [2024-10-11 14:26:07,559 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 59 places, 87 transitions, 523 flow [2024-10-11 14:26:07,559 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-10-11 14:26:07,560 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-10-11 14:26:07,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 107 transitions. [2024-10-11 14:26:07,561 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4246031746031746 [2024-10-11 14:26:07,561 INFO L175 Difference]: Start difference. First operand has 52 places, 40 transitions, 205 flow. Second operand 9 states and 107 transitions. [2024-10-11 14:26:07,561 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 59 places, 87 transitions, 523 flow [2024-10-11 14:26:07,563 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 87 transitions, 504 flow, removed 5 selfloop flow, removed 5 redundant places. [2024-10-11 14:26:07,564 INFO L231 Difference]: Finished difference. Result has 57 places, 46 transitions, 288 flow [2024-10-11 14:26:07,564 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=192, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=288, PETRI_PLACES=57, PETRI_TRANSITIONS=46} [2024-10-11 14:26:07,565 INFO L277 CegarLoopForPetriNet]: 26 programPoint places, 31 predicate places. [2024-10-11 14:26:07,565 INFO L471 AbstractCegarLoop]: Abstraction has has 57 places, 46 transitions, 288 flow [2024-10-11 14:26:07,565 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 5.428571428571429) internal successors, (38), 7 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 14:26:07,565 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 14:26:07,565 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 14:26:07,577 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-10-11 14:26:07,769 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 14:26:07,770 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-11 14:26:07,770 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 14:26:07,770 INFO L85 PathProgramCache]: Analyzing trace with hash -133012491, now seen corresponding path program 2 times [2024-10-11 14:26:07,770 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 14:26:07,770 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1380665310] [2024-10-11 14:26:07,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 14:26:07,770 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 14:26:07,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 14:26:07,928 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 14:26:07,928 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 14:26:07,928 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1380665310] [2024-10-11 14:26:07,928 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1380665310] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-11 14:26:07,929 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1111708496] [2024-10-11 14:26:07,929 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-11 14:26:07,929 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 14:26:07,929 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 14:26:07,930 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-11 14:26:07,931 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-10-11 14:26:07,996 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2024-10-11 14:26:07,996 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-11 14:26:07,997 INFO L255 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-10-11 14:26:07,997 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 14:26:08,024 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-11 14:26:08,024 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-10-11 14:26:08,024 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1111708496] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-11 14:26:08,024 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-10-11 14:26:08,024 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [7] total 10 [2024-10-11 14:26:08,024 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [625858767] [2024-10-11 14:26:08,025 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-11 14:26:08,025 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-10-11 14:26:08,025 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 14:26:08,026 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-10-11 14:26:08,026 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2024-10-11 14:26:08,026 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 28 [2024-10-11 14:26:08,026 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 46 transitions, 288 flow. Second operand has 4 states, 4 states have (on average 7.25) internal successors, (29), 4 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) [2024-10-11 14:26:08,026 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 14:26:08,026 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 28 [2024-10-11 14:26:08,026 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 14:26:08,143 INFO L124 PetriNetUnfolderBase]: 482/826 cut-off events. [2024-10-11 14:26:08,144 INFO L125 PetriNetUnfolderBase]: For 901/901 co-relation queries the response was YES. [2024-10-11 14:26:08,145 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2306 conditions, 826 events. 482/826 cut-off events. For 901/901 co-relation queries the response was YES. Maximal size of possible extension queue 65. Compared 3584 event pairs, 33 based on Foata normal form. 2/826 useless extension candidates. Maximal degree in co-relation 2104. Up to 313 conditions per place. [2024-10-11 14:26:08,148 INFO L140 encePairwiseOnDemand]: 22/28 looper letters, 50 selfloop transitions, 17 changer transitions 5/73 dead transitions. [2024-10-11 14:26:08,149 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 73 transitions, 519 flow [2024-10-11 14:26:08,150 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-10-11 14:26:08,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-10-11 14:26:08,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 69 transitions. [2024-10-11 14:26:08,150 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4928571428571429 [2024-10-11 14:26:08,150 INFO L175 Difference]: Start difference. First operand has 57 places, 46 transitions, 288 flow. Second operand 5 states and 69 transitions. [2024-10-11 14:26:08,150 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 73 transitions, 519 flow [2024-10-11 14:26:08,152 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 73 transitions, 505 flow, removed 4 selfloop flow, removed 2 redundant places. [2024-10-11 14:26:08,153 INFO L231 Difference]: Finished difference. Result has 61 places, 45 transitions, 317 flow [2024-10-11 14:26:08,156 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=274, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=317, PETRI_PLACES=61, PETRI_TRANSITIONS=45} [2024-10-11 14:26:08,157 INFO L277 CegarLoopForPetriNet]: 26 programPoint places, 35 predicate places. [2024-10-11 14:26:08,158 INFO L471 AbstractCegarLoop]: Abstraction has has 61 places, 45 transitions, 317 flow [2024-10-11 14:26:08,158 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.25) internal successors, (29), 4 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) [2024-10-11 14:26:08,158 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 14:26:08,158 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 14:26:08,170 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-10-11 14:26:08,362 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2024-10-11 14:26:08,363 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-11 14:26:08,363 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 14:26:08,363 INFO L85 PathProgramCache]: Analyzing trace with hash -2026604512, now seen corresponding path program 1 times [2024-10-11 14:26:08,363 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 14:26:08,364 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [295924353] [2024-10-11 14:26:08,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 14:26:08,364 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 14:26:08,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 14:26:08,483 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 14:26:08,483 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 14:26:08,483 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [295924353] [2024-10-11 14:26:08,483 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [295924353] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-11 14:26:08,484 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1257255284] [2024-10-11 14:26:08,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 14:26:08,484 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 14:26:08,484 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 14:26:08,486 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-11 14:26:08,486 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-10-11 14:26:08,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 14:26:08,553 INFO L255 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-10-11 14:26:08,556 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 14:26:08,641 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 14:26:08,643 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-11 14:26:08,704 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 14:26:08,704 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1257255284] provided 1 perfect and 1 imperfect interpolant sequences [2024-10-11 14:26:08,704 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-10-11 14:26:08,704 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [7, 6] total 13 [2024-10-11 14:26:08,705 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [475464508] [2024-10-11 14:26:08,705 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-11 14:26:08,705 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-10-11 14:26:08,705 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 14:26:08,706 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-10-11 14:26:08,706 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2024-10-11 14:26:08,706 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 28 [2024-10-11 14:26:08,706 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 45 transitions, 317 flow. Second operand has 7 states, 7 states have (on average 5.571428571428571) internal successors, (39), 7 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 14:26:08,706 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 14:26:08,706 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 28 [2024-10-11 14:26:08,707 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 14:26:08,875 INFO L124 PetriNetUnfolderBase]: 488/817 cut-off events. [2024-10-11 14:26:08,875 INFO L125 PetriNetUnfolderBase]: For 1632/1632 co-relation queries the response was YES. [2024-10-11 14:26:08,876 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2484 conditions, 817 events. 488/817 cut-off events. For 1632/1632 co-relation queries the response was YES. Maximal size of possible extension queue 54. Compared 3379 event pairs, 182 based on Foata normal form. 20/836 useless extension candidates. Maximal degree in co-relation 2449. Up to 264 conditions per place. [2024-10-11 14:26:08,879 INFO L140 encePairwiseOnDemand]: 19/28 looper letters, 74 selfloop transitions, 11 changer transitions 0/86 dead transitions. [2024-10-11 14:26:08,879 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 86 transitions, 663 flow [2024-10-11 14:26:08,879 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-10-11 14:26:08,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-10-11 14:26:08,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 94 transitions. [2024-10-11 14:26:08,880 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.41964285714285715 [2024-10-11 14:26:08,880 INFO L175 Difference]: Start difference. First operand has 61 places, 45 transitions, 317 flow. Second operand 8 states and 94 transitions. [2024-10-11 14:26:08,880 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 86 transitions, 663 flow [2024-10-11 14:26:08,883 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 86 transitions, 620 flow, removed 19 selfloop flow, removed 6 redundant places. [2024-10-11 14:26:08,884 INFO L231 Difference]: Finished difference. Result has 57 places, 48 transitions, 326 flow [2024-10-11 14:26:08,884 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=290, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=326, PETRI_PLACES=57, PETRI_TRANSITIONS=48} [2024-10-11 14:26:08,885 INFO L277 CegarLoopForPetriNet]: 26 programPoint places, 31 predicate places. [2024-10-11 14:26:08,885 INFO L471 AbstractCegarLoop]: Abstraction has has 57 places, 48 transitions, 326 flow [2024-10-11 14:26:08,885 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 5.571428571428571) internal successors, (39), 7 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 14:26:08,885 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 14:26:08,885 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 14:26:08,898 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-10-11 14:26:09,085 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 14:26:09,086 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-11 14:26:09,087 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 14:26:09,087 INFO L85 PathProgramCache]: Analyzing trace with hash 1401016533, now seen corresponding path program 1 times [2024-10-11 14:26:09,087 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 14:26:09,087 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2008359428] [2024-10-11 14:26:09,087 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 14:26:09,087 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 14:26:09,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 14:26:09,166 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-11 14:26:09,167 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 14:26:09,167 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2008359428] [2024-10-11 14:26:09,167 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2008359428] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-11 14:26:09,167 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-11 14:26:09,167 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-10-11 14:26:09,167 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [146428043] [2024-10-11 14:26:09,168 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-11 14:26:09,168 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-10-11 14:26:09,168 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 14:26:09,169 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-10-11 14:26:09,169 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-10-11 14:26:09,169 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 28 [2024-10-11 14:26:09,169 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 48 transitions, 326 flow. Second operand has 5 states, 5 states have (on average 6.6) internal successors, (33), 5 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 14:26:09,169 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 14:26:09,169 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 28 [2024-10-11 14:26:09,170 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 14:26:09,290 INFO L124 PetriNetUnfolderBase]: 370/636 cut-off events. [2024-10-11 14:26:09,291 INFO L125 PetriNetUnfolderBase]: For 1179/1179 co-relation queries the response was YES. [2024-10-11 14:26:09,292 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1906 conditions, 636 events. 370/636 cut-off events. For 1179/1179 co-relation queries the response was YES. Maximal size of possible extension queue 44. Compared 2525 event pairs, 188 based on Foata normal form. 25/616 useless extension candidates. Maximal degree in co-relation 1872. Up to 396 conditions per place. [2024-10-11 14:26:09,294 INFO L140 encePairwiseOnDemand]: 23/28 looper letters, 52 selfloop transitions, 6 changer transitions 2/61 dead transitions. [2024-10-11 14:26:09,294 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 61 transitions, 446 flow [2024-10-11 14:26:09,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-10-11 14:26:09,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-10-11 14:26:09,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 66 transitions. [2024-10-11 14:26:09,295 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4714285714285714 [2024-10-11 14:26:09,295 INFO L175 Difference]: Start difference. First operand has 57 places, 48 transitions, 326 flow. Second operand 5 states and 66 transitions. [2024-10-11 14:26:09,295 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 61 transitions, 446 flow [2024-10-11 14:26:09,297 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 61 transitions, 422 flow, removed 4 selfloop flow, removed 6 redundant places. [2024-10-11 14:26:09,300 INFO L231 Difference]: Finished difference. Result has 54 places, 42 transitions, 263 flow [2024-10-11 14:26:09,300 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=251, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=263, PETRI_PLACES=54, PETRI_TRANSITIONS=42} [2024-10-11 14:26:09,300 INFO L277 CegarLoopForPetriNet]: 26 programPoint places, 28 predicate places. [2024-10-11 14:26:09,300 INFO L471 AbstractCegarLoop]: Abstraction has has 54 places, 42 transitions, 263 flow [2024-10-11 14:26:09,301 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 6.6) internal successors, (33), 5 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 14:26:09,301 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 14:26:09,301 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 14:26:09,301 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-10-11 14:26:09,301 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-11 14:26:09,301 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 14:26:09,301 INFO L85 PathProgramCache]: Analyzing trace with hash 1357813479, now seen corresponding path program 1 times [2024-10-11 14:26:09,301 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 14:26:09,301 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [449191721] [2024-10-11 14:26:09,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 14:26:09,301 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 14:26:09,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 14:26:09,365 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-11 14:26:09,366 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 14:26:09,366 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [449191721] [2024-10-11 14:26:09,366 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [449191721] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-11 14:26:09,366 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-11 14:26:09,366 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-10-11 14:26:09,366 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1822838984] [2024-10-11 14:26:09,366 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-11 14:26:09,367 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-10-11 14:26:09,367 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 14:26:09,368 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-10-11 14:26:09,368 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-10-11 14:26:09,368 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 28 [2024-10-11 14:26:09,368 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 42 transitions, 263 flow. Second operand has 5 states, 5 states have (on average 6.6) internal successors, (33), 5 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 14:26:09,368 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 14:26:09,368 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 28 [2024-10-11 14:26:09,368 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 14:26:09,446 INFO L124 PetriNetUnfolderBase]: 302/525 cut-off events. [2024-10-11 14:26:09,447 INFO L125 PetriNetUnfolderBase]: For 767/767 co-relation queries the response was YES. [2024-10-11 14:26:09,447 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1535 conditions, 525 events. 302/525 cut-off events. For 767/767 co-relation queries the response was YES. Maximal size of possible extension queue 33. Compared 1960 event pairs, 170 based on Foata normal form. 0/496 useless extension candidates. Maximal degree in co-relation 1504. Up to 396 conditions per place. [2024-10-11 14:26:09,449 INFO L140 encePairwiseOnDemand]: 23/28 looper letters, 30 selfloop transitions, 2 changer transitions 20/53 dead transitions. [2024-10-11 14:26:09,449 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 53 transitions, 368 flow [2024-10-11 14:26:09,450 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-10-11 14:26:09,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-10-11 14:26:09,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 60 transitions. [2024-10-11 14:26:09,451 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.42857142857142855 [2024-10-11 14:26:09,451 INFO L175 Difference]: Start difference. First operand has 54 places, 42 transitions, 263 flow. Second operand 5 states and 60 transitions. [2024-10-11 14:26:09,451 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 53 transitions, 368 flow [2024-10-11 14:26:09,452 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 53 transitions, 354 flow, removed 1 selfloop flow, removed 5 redundant places. [2024-10-11 14:26:09,453 INFO L231 Difference]: Finished difference. Result has 54 places, 33 transitions, 168 flow [2024-10-11 14:26:09,453 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=211, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=168, PETRI_PLACES=54, PETRI_TRANSITIONS=33} [2024-10-11 14:26:09,453 INFO L277 CegarLoopForPetriNet]: 26 programPoint places, 28 predicate places. [2024-10-11 14:26:09,454 INFO L471 AbstractCegarLoop]: Abstraction has has 54 places, 33 transitions, 168 flow [2024-10-11 14:26:09,454 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 6.6) internal successors, (33), 5 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 14:26:09,454 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 14:26:09,454 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 14:26:09,454 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-10-11 14:26:09,454 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-11 14:26:09,454 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 14:26:09,454 INFO L85 PathProgramCache]: Analyzing trace with hash -333811787, now seen corresponding path program 1 times [2024-10-11 14:26:09,455 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 14:26:09,455 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1313802317] [2024-10-11 14:26:09,455 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 14:26:09,455 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 14:26:09,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 14:26:09,563 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 14:26:09,563 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 14:26:09,563 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1313802317] [2024-10-11 14:26:09,563 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1313802317] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-11 14:26:09,563 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1815108172] [2024-10-11 14:26:09,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 14:26:09,564 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 14:26:09,564 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 14:26:09,565 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-11 14:26:09,566 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-10-11 14:26:09,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 14:26:09,630 INFO L255 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-10-11 14:26:09,632 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 14:26:09,682 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 14:26:09,683 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-11 14:26:09,736 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 14:26:09,736 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1815108172] provided 1 perfect and 1 imperfect interpolant sequences [2024-10-11 14:26:09,736 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-10-11 14:26:09,736 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [7, 6] total 13 [2024-10-11 14:26:09,737 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1423360051] [2024-10-11 14:26:09,737 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-11 14:26:09,737 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-10-11 14:26:09,737 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 14:26:09,737 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-10-11 14:26:09,737 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=127, Unknown=0, NotChecked=0, Total=182 [2024-10-11 14:26:09,738 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 28 [2024-10-11 14:26:09,738 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 33 transitions, 168 flow. Second operand has 7 states, 7 states have (on average 5.714285714285714) internal successors, (40), 7 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 14:26:09,738 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 14:26:09,738 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 28 [2024-10-11 14:26:09,738 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 14:26:09,827 INFO L124 PetriNetUnfolderBase]: 328/561 cut-off events. [2024-10-11 14:26:09,827 INFO L125 PetriNetUnfolderBase]: For 674/674 co-relation queries the response was YES. [2024-10-11 14:26:09,828 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1645 conditions, 561 events. 328/561 cut-off events. For 674/674 co-relation queries the response was YES. Maximal size of possible extension queue 35. Compared 2111 event pairs, 159 based on Foata normal form. 28/588 useless extension candidates. Maximal degree in co-relation 1614. Up to 278 conditions per place. [2024-10-11 14:26:09,830 INFO L140 encePairwiseOnDemand]: 20/28 looper letters, 39 selfloop transitions, 9 changer transitions 0/49 dead transitions. [2024-10-11 14:26:09,830 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 51 places, 49 transitions, 333 flow [2024-10-11 14:26:09,830 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-10-11 14:26:09,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-10-11 14:26:09,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 62 transitions. [2024-10-11 14:26:09,831 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.3163265306122449 [2024-10-11 14:26:09,831 INFO L175 Difference]: Start difference. First operand has 54 places, 33 transitions, 168 flow. Second operand 7 states and 62 transitions. [2024-10-11 14:26:09,831 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 51 places, 49 transitions, 333 flow [2024-10-11 14:26:09,832 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 49 transitions, 312 flow, removed 7 selfloop flow, removed 5 redundant places. [2024-10-11 14:26:09,832 INFO L231 Difference]: Finished difference. Result has 48 places, 34 transitions, 186 flow [2024-10-11 14:26:09,833 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=151, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=186, PETRI_PLACES=48, PETRI_TRANSITIONS=34} [2024-10-11 14:26:09,833 INFO L277 CegarLoopForPetriNet]: 26 programPoint places, 22 predicate places. [2024-10-11 14:26:09,833 INFO L471 AbstractCegarLoop]: Abstraction has has 48 places, 34 transitions, 186 flow [2024-10-11 14:26:09,833 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 5.714285714285714) internal successors, (40), 7 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 14:26:09,833 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 14:26:09,833 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 14:26:09,846 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-10-11 14:26:10,037 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2024-10-11 14:26:10,038 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-11 14:26:10,038 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 14:26:10,038 INFO L85 PathProgramCache]: Analyzing trace with hash -1721947342, now seen corresponding path program 1 times [2024-10-11 14:26:10,038 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 14:26:10,038 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [190542113] [2024-10-11 14:26:10,038 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 14:26:10,038 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 14:26:10,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 14:26:10,358 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-10-11 14:26:10,358 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 14:26:10,359 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [190542113] [2024-10-11 14:26:10,359 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [190542113] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-11 14:26:10,359 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-11 14:26:10,359 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-10-11 14:26:10,359 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [985730353] [2024-10-11 14:26:10,359 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-11 14:26:10,359 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-10-11 14:26:10,359 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 14:26:10,359 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-10-11 14:26:10,360 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-10-11 14:26:10,360 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 28 [2024-10-11 14:26:10,360 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 48 places, 34 transitions, 186 flow. Second operand has 9 states, 9 states have (on average 5.222222222222222) internal successors, (47), 9 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 14:26:10,360 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 14:26:10,360 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 28 [2024-10-11 14:26:10,360 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 14:26:10,626 INFO L124 PetriNetUnfolderBase]: 461/793 cut-off events. [2024-10-11 14:26:10,626 INFO L125 PetriNetUnfolderBase]: For 1195/1195 co-relation queries the response was YES. [2024-10-11 14:26:10,627 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2490 conditions, 793 events. 461/793 cut-off events. For 1195/1195 co-relation queries the response was YES. Maximal size of possible extension queue 51. Compared 3394 event pairs, 122 based on Foata normal form. 1/793 useless extension candidates. Maximal degree in co-relation 2458. Up to 485 conditions per place. [2024-10-11 14:26:10,629 INFO L140 encePairwiseOnDemand]: 18/28 looper letters, 57 selfloop transitions, 12 changer transitions 6/76 dead transitions. [2024-10-11 14:26:10,630 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 76 transitions, 507 flow [2024-10-11 14:26:10,630 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-10-11 14:26:10,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-10-11 14:26:10,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 97 transitions. [2024-10-11 14:26:10,630 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.3464285714285714 [2024-10-11 14:26:10,631 INFO L175 Difference]: Start difference. First operand has 48 places, 34 transitions, 186 flow. Second operand 10 states and 97 transitions. [2024-10-11 14:26:10,631 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 76 transitions, 507 flow [2024-10-11 14:26:10,632 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 52 places, 76 transitions, 494 flow, removed 0 selfloop flow, removed 5 redundant places. [2024-10-11 14:26:10,633 INFO L231 Difference]: Finished difference. Result has 56 places, 39 transitions, 260 flow [2024-10-11 14:26:10,634 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=174, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=34, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=260, PETRI_PLACES=56, PETRI_TRANSITIONS=39} [2024-10-11 14:26:10,635 INFO L277 CegarLoopForPetriNet]: 26 programPoint places, 30 predicate places. [2024-10-11 14:26:10,635 INFO L471 AbstractCegarLoop]: Abstraction has has 56 places, 39 transitions, 260 flow [2024-10-11 14:26:10,636 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 5.222222222222222) internal successors, (47), 9 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 14:26:10,636 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 14:26:10,636 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 14:26:10,636 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-10-11 14:26:10,636 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-11 14:26:10,636 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 14:26:10,636 INFO L85 PathProgramCache]: Analyzing trace with hash -425613040, now seen corresponding path program 2 times [2024-10-11 14:26:10,636 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 14:26:10,637 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [310994379] [2024-10-11 14:26:10,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 14:26:10,637 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 14:26:10,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 14:26:10,970 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-10-11 14:26:10,970 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 14:26:10,970 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [310994379] [2024-10-11 14:26:10,970 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [310994379] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-11 14:26:10,970 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-11 14:26:10,970 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-10-11 14:26:10,970 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [47112270] [2024-10-11 14:26:10,970 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-11 14:26:10,971 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-10-11 14:26:10,971 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 14:26:10,971 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-10-11 14:26:10,971 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-10-11 14:26:10,972 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 28 [2024-10-11 14:26:10,972 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 39 transitions, 260 flow. Second operand has 10 states, 10 states have (on average 5.0) internal successors, (50), 10 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 14:26:10,972 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 14:26:10,972 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 28 [2024-10-11 14:26:10,972 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 14:26:11,213 INFO L124 PetriNetUnfolderBase]: 476/816 cut-off events. [2024-10-11 14:26:11,213 INFO L125 PetriNetUnfolderBase]: For 1993/1993 co-relation queries the response was YES. [2024-10-11 14:26:11,215 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2862 conditions, 816 events. 476/816 cut-off events. For 1993/1993 co-relation queries the response was YES. Maximal size of possible extension queue 51. Compared 3476 event pairs, 231 based on Foata normal form. 1/817 useless extension candidates. Maximal degree in co-relation 2827. Up to 498 conditions per place. [2024-10-11 14:26:11,218 INFO L140 encePairwiseOnDemand]: 18/28 looper letters, 58 selfloop transitions, 15 changer transitions 6/80 dead transitions. [2024-10-11 14:26:11,218 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 80 transitions, 624 flow [2024-10-11 14:26:11,218 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-10-11 14:26:11,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-10-11 14:26:11,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 92 transitions. [2024-10-11 14:26:11,219 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.36507936507936506 [2024-10-11 14:26:11,219 INFO L175 Difference]: Start difference. First operand has 56 places, 39 transitions, 260 flow. Second operand 9 states and 92 transitions. [2024-10-11 14:26:11,219 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 80 transitions, 624 flow [2024-10-11 14:26:11,221 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 80 transitions, 603 flow, removed 4 selfloop flow, removed 6 redundant places. [2024-10-11 14:26:11,222 INFO L231 Difference]: Finished difference. Result has 60 places, 45 transitions, 348 flow [2024-10-11 14:26:11,222 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=241, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=348, PETRI_PLACES=60, PETRI_TRANSITIONS=45} [2024-10-11 14:26:11,223 INFO L277 CegarLoopForPetriNet]: 26 programPoint places, 34 predicate places. [2024-10-11 14:26:11,223 INFO L471 AbstractCegarLoop]: Abstraction has has 60 places, 45 transitions, 348 flow [2024-10-11 14:26:11,223 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 5.0) internal successors, (50), 10 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 14:26:11,223 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 14:26:11,223 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 14:26:11,223 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-10-11 14:26:11,223 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-11 14:26:11,224 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 14:26:11,224 INFO L85 PathProgramCache]: Analyzing trace with hash 2087679896, now seen corresponding path program 3 times [2024-10-11 14:26:11,224 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 14:26:11,224 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [282700253] [2024-10-11 14:26:11,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 14:26:11,224 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 14:26:11,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 14:26:11,648 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 14:26:11,648 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 14:26:11,648 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [282700253] [2024-10-11 14:26:11,648 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [282700253] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-11 14:26:11,648 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1959244897] [2024-10-11 14:26:11,648 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-10-11 14:26:11,648 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 14:26:11,648 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 14:26:11,651 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-11 14:26:11,652 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-10-11 14:26:11,720 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2024-10-11 14:26:11,721 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-11 14:26:11,722 INFO L255 TraceCheckSpWp]: Trace formula consists of 186 conjuncts, 19 conjuncts are in the unsatisfiable core [2024-10-11 14:26:11,723 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 14:26:11,812 INFO L349 Elim1Store]: treesize reduction 3, result has 75.0 percent of original size [2024-10-11 14:26:11,813 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 39 treesize of output 24 [2024-10-11 14:26:11,834 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-10-11 14:26:11,834 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-10-11 14:26:11,835 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1959244897] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-11 14:26:11,835 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-10-11 14:26:11,835 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [10] total 16 [2024-10-11 14:26:11,835 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2144797528] [2024-10-11 14:26:11,835 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-11 14:26:11,835 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-10-11 14:26:11,835 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 14:26:11,836 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-10-11 14:26:11,836 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=198, Unknown=0, NotChecked=0, Total=240 [2024-10-11 14:26:11,836 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 28 [2024-10-11 14:26:11,836 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 45 transitions, 348 flow. Second operand has 7 states, 7 states have (on average 5.857142857142857) internal successors, (41), 7 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 14:26:11,836 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 14:26:11,836 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 28 [2024-10-11 14:26:11,836 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 14:26:12,041 INFO L124 PetriNetUnfolderBase]: 536/934 cut-off events. [2024-10-11 14:26:12,041 INFO L125 PetriNetUnfolderBase]: For 2792/2792 co-relation queries the response was YES. [2024-10-11 14:26:12,043 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3564 conditions, 934 events. 536/934 cut-off events. For 2792/2792 co-relation queries the response was YES. Maximal size of possible extension queue 64. Compared 4273 event pairs, 231 based on Foata normal form. 1/935 useless extension candidates. Maximal degree in co-relation 3530. Up to 511 conditions per place. [2024-10-11 14:26:12,046 INFO L140 encePairwiseOnDemand]: 20/28 looper letters, 67 selfloop transitions, 17 changer transitions 6/91 dead transitions. [2024-10-11 14:26:12,047 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 91 transitions, 762 flow [2024-10-11 14:26:12,047 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-10-11 14:26:12,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-10-11 14:26:12,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 95 transitions. [2024-10-11 14:26:12,048 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4846938775510204 [2024-10-11 14:26:12,048 INFO L175 Difference]: Start difference. First operand has 60 places, 45 transitions, 348 flow. Second operand 7 states and 95 transitions. [2024-10-11 14:26:12,048 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 91 transitions, 762 flow [2024-10-11 14:26:12,051 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 91 transitions, 696 flow, removed 17 selfloop flow, removed 6 redundant places. [2024-10-11 14:26:12,052 INFO L231 Difference]: Finished difference. Result has 64 places, 53 transitions, 448 flow [2024-10-11 14:26:12,052 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=296, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=448, PETRI_PLACES=64, PETRI_TRANSITIONS=53} [2024-10-11 14:26:12,053 INFO L277 CegarLoopForPetriNet]: 26 programPoint places, 38 predicate places. [2024-10-11 14:26:12,053 INFO L471 AbstractCegarLoop]: Abstraction has has 64 places, 53 transitions, 448 flow [2024-10-11 14:26:12,053 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 5.857142857142857) internal successors, (41), 7 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 14:26:12,053 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 14:26:12,053 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 14:26:12,065 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2024-10-11 14:26:12,257 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,8 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 14:26:12,258 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-11 14:26:12,258 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 14:26:12,258 INFO L85 PathProgramCache]: Analyzing trace with hash 1149093434, now seen corresponding path program 4 times [2024-10-11 14:26:12,258 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 14:26:12,258 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1190856637] [2024-10-11 14:26:12,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 14:26:12,258 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 14:26:12,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 14:26:12,731 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 14:26:12,732 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 14:26:12,732 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1190856637] [2024-10-11 14:26:12,732 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1190856637] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-11 14:26:12,732 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [933525398] [2024-10-11 14:26:12,732 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-10-11 14:26:12,732 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 14:26:12,732 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 14:26:12,734 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-11 14:26:12,735 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-10-11 14:26:12,798 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-10-11 14:26:12,798 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-11 14:26:12,799 INFO L255 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 29 conjuncts are in the unsatisfiable core [2024-10-11 14:26:12,800 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 14:26:12,902 INFO L349 Elim1Store]: treesize reduction 3, result has 75.0 percent of original size [2024-10-11 14:26:12,902 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 39 treesize of output 24 [2024-10-11 14:26:12,925 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-10-11 14:26:12,926 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-10-11 14:26:12,926 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [933525398] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-11 14:26:12,926 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-10-11 14:26:12,926 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [11] total 18 [2024-10-11 14:26:12,926 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [261437592] [2024-10-11 14:26:12,926 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-11 14:26:12,927 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-10-11 14:26:12,927 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 14:26:12,927 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-10-11 14:26:12,927 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=272, Unknown=0, NotChecked=0, Total=342 [2024-10-11 14:26:12,927 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 28 [2024-10-11 14:26:12,928 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 53 transitions, 448 flow. Second operand has 9 states, 9 states have (on average 5.222222222222222) internal successors, (47), 9 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 14:26:12,928 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 14:26:12,928 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 28 [2024-10-11 14:26:12,928 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 14:26:13,162 INFO L124 PetriNetUnfolderBase]: 546/954 cut-off events. [2024-10-11 14:26:13,162 INFO L125 PetriNetUnfolderBase]: For 3318/3318 co-relation queries the response was YES. [2024-10-11 14:26:13,187 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3804 conditions, 954 events. 546/954 cut-off events. For 3318/3318 co-relation queries the response was YES. Maximal size of possible extension queue 68. Compared 4411 event pairs, 235 based on Foata normal form. 1/954 useless extension candidates. Maximal degree in co-relation 3768. Up to 504 conditions per place. [2024-10-11 14:26:13,191 INFO L140 encePairwiseOnDemand]: 18/28 looper letters, 60 selfloop transitions, 26 changer transitions 6/93 dead transitions. [2024-10-11 14:26:13,191 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 93 transitions, 841 flow [2024-10-11 14:26:13,192 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-10-11 14:26:13,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-10-11 14:26:13,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 96 transitions. [2024-10-11 14:26:13,192 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.38095238095238093 [2024-10-11 14:26:13,192 INFO L175 Difference]: Start difference. First operand has 64 places, 53 transitions, 448 flow. Second operand 9 states and 96 transitions. [2024-10-11 14:26:13,192 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 93 transitions, 841 flow [2024-10-11 14:26:13,196 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 93 transitions, 819 flow, removed 11 selfloop flow, removed 1 redundant places. [2024-10-11 14:26:13,197 INFO L231 Difference]: Finished difference. Result has 74 places, 61 transitions, 608 flow [2024-10-11 14:26:13,198 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=436, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=53, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=608, PETRI_PLACES=74, PETRI_TRANSITIONS=61} [2024-10-11 14:26:13,198 INFO L277 CegarLoopForPetriNet]: 26 programPoint places, 48 predicate places. [2024-10-11 14:26:13,198 INFO L471 AbstractCegarLoop]: Abstraction has has 74 places, 61 transitions, 608 flow [2024-10-11 14:26:13,198 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 5.222222222222222) internal successors, (47), 9 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 14:26:13,198 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 14:26:13,198 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 14:26:13,213 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2024-10-11 14:26:13,402 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2024-10-11 14:26:13,403 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-11 14:26:13,404 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 14:26:13,404 INFO L85 PathProgramCache]: Analyzing trace with hash -1085014060, now seen corresponding path program 5 times [2024-10-11 14:26:13,404 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 14:26:13,404 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [740597520] [2024-10-11 14:26:13,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 14:26:13,404 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 14:26:13,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 14:26:13,658 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-10-11 14:26:13,659 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 14:26:13,659 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [740597520] [2024-10-11 14:26:13,659 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [740597520] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-11 14:26:13,659 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-11 14:26:13,659 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-10-11 14:26:13,659 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1278184392] [2024-10-11 14:26:13,659 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-11 14:26:13,659 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-10-11 14:26:13,660 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 14:26:13,660 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-10-11 14:26:13,660 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-10-11 14:26:13,660 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 28 [2024-10-11 14:26:13,660 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 61 transitions, 608 flow. Second operand has 10 states, 10 states have (on average 5.0) internal successors, (50), 10 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 14:26:13,660 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 14:26:13,660 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 28 [2024-10-11 14:26:13,660 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 14:26:13,926 INFO L124 PetriNetUnfolderBase]: 536/931 cut-off events. [2024-10-11 14:26:13,926 INFO L125 PetriNetUnfolderBase]: For 3914/3914 co-relation queries the response was YES. [2024-10-11 14:26:13,929 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4012 conditions, 931 events. 536/931 cut-off events. For 3914/3914 co-relation queries the response was YES. Maximal size of possible extension queue 66. Compared 4244 event pairs, 226 based on Foata normal form. 1/932 useless extension candidates. Maximal degree in co-relation 3971. Up to 504 conditions per place. [2024-10-11 14:26:13,932 INFO L140 encePairwiseOnDemand]: 18/28 looper letters, 61 selfloop transitions, 27 changer transitions 6/95 dead transitions. [2024-10-11 14:26:13,932 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 81 places, 95 transitions, 943 flow [2024-10-11 14:26:13,933 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-10-11 14:26:13,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-10-11 14:26:13,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 96 transitions. [2024-10-11 14:26:13,933 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.38095238095238093 [2024-10-11 14:26:13,933 INFO L175 Difference]: Start difference. First operand has 74 places, 61 transitions, 608 flow. Second operand 9 states and 96 transitions. [2024-10-11 14:26:13,933 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 81 places, 95 transitions, 943 flow [2024-10-11 14:26:13,938 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 95 transitions, 895 flow, removed 10 selfloop flow, removed 5 redundant places. [2024-10-11 14:26:13,940 INFO L231 Difference]: Finished difference. Result has 79 places, 63 transitions, 660 flow [2024-10-11 14:26:13,940 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=569, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=61, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=660, PETRI_PLACES=79, PETRI_TRANSITIONS=63} [2024-10-11 14:26:13,940 INFO L277 CegarLoopForPetriNet]: 26 programPoint places, 53 predicate places. [2024-10-11 14:26:13,940 INFO L471 AbstractCegarLoop]: Abstraction has has 79 places, 63 transitions, 660 flow [2024-10-11 14:26:13,940 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 5.0) internal successors, (50), 10 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 14:26:13,940 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 14:26:13,941 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 14:26:13,941 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-10-11 14:26:13,941 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-11 14:26:13,941 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 14:26:13,941 INFO L85 PathProgramCache]: Analyzing trace with hash 162132282, now seen corresponding path program 6 times [2024-10-11 14:26:13,941 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 14:26:13,941 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [590392581] [2024-10-11 14:26:13,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 14:26:13,942 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 14:26:13,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 14:26:14,212 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-10-11 14:26:14,212 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 14:26:14,212 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [590392581] [2024-10-11 14:26:14,212 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [590392581] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-11 14:26:14,212 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-11 14:26:14,213 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-10-11 14:26:14,213 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1407156913] [2024-10-11 14:26:14,213 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-11 14:26:14,213 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-10-11 14:26:14,213 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 14:26:14,213 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-10-11 14:26:14,213 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-10-11 14:26:14,213 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 28 [2024-10-11 14:26:14,213 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 79 places, 63 transitions, 660 flow. Second operand has 10 states, 10 states have (on average 5.0) internal successors, (50), 10 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 14:26:14,214 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 14:26:14,214 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 28 [2024-10-11 14:26:14,214 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 14:26:14,471 INFO L124 PetriNetUnfolderBase]: 539/938 cut-off events. [2024-10-11 14:26:14,471 INFO L125 PetriNetUnfolderBase]: For 4290/4290 co-relation queries the response was YES. [2024-10-11 14:26:14,473 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4099 conditions, 938 events. 539/938 cut-off events. For 4290/4290 co-relation queries the response was YES. Maximal size of possible extension queue 68. Compared 4299 event pairs, 231 based on Foata normal form. 1/939 useless extension candidates. Maximal degree in co-relation 4056. Up to 508 conditions per place. [2024-10-11 14:26:14,477 INFO L140 encePairwiseOnDemand]: 18/28 looper letters, 61 selfloop transitions, 27 changer transitions 6/95 dead transitions. [2024-10-11 14:26:14,477 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 86 places, 95 transitions, 1005 flow [2024-10-11 14:26:14,477 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-10-11 14:26:14,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-10-11 14:26:14,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 96 transitions. [2024-10-11 14:26:14,478 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.38095238095238093 [2024-10-11 14:26:14,478 INFO L175 Difference]: Start difference. First operand has 79 places, 63 transitions, 660 flow. Second operand 9 states and 96 transitions. [2024-10-11 14:26:14,478 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 86 places, 95 transitions, 1005 flow [2024-10-11 14:26:14,483 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 81 places, 95 transitions, 962 flow, removed 7 selfloop flow, removed 5 redundant places. [2024-10-11 14:26:14,485 INFO L231 Difference]: Finished difference. Result has 83 places, 65 transitions, 720 flow [2024-10-11 14:26:14,486 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=624, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=63, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=720, PETRI_PLACES=83, PETRI_TRANSITIONS=65} [2024-10-11 14:26:14,486 INFO L277 CegarLoopForPetriNet]: 26 programPoint places, 57 predicate places. [2024-10-11 14:26:14,486 INFO L471 AbstractCegarLoop]: Abstraction has has 83 places, 65 transitions, 720 flow [2024-10-11 14:26:14,486 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 5.0) internal successors, (50), 10 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 14:26:14,486 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 14:26:14,486 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 14:26:14,486 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-10-11 14:26:14,487 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-11 14:26:14,487 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 14:26:14,487 INFO L85 PathProgramCache]: Analyzing trace with hash 1761810430, now seen corresponding path program 7 times [2024-10-11 14:26:14,487 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 14:26:14,487 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2797309] [2024-10-11 14:26:14,487 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 14:26:14,487 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 14:26:14,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 14:26:14,726 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-10-11 14:26:14,727 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 14:26:14,727 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2797309] [2024-10-11 14:26:14,727 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2797309] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-11 14:26:14,727 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-11 14:26:14,727 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-10-11 14:26:14,727 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1058601178] [2024-10-11 14:26:14,727 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-11 14:26:14,727 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-10-11 14:26:14,728 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 14:26:14,728 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-10-11 14:26:14,729 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-10-11 14:26:14,729 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 28 [2024-10-11 14:26:14,729 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 83 places, 65 transitions, 720 flow. Second operand has 10 states, 10 states have (on average 5.0) internal successors, (50), 10 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 14:26:14,729 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 14:26:14,729 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 28 [2024-10-11 14:26:14,730 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 14:26:14,965 INFO L124 PetriNetUnfolderBase]: 530/916 cut-off events. [2024-10-11 14:26:14,965 INFO L125 PetriNetUnfolderBase]: For 4335/4335 co-relation queries the response was YES. [2024-10-11 14:26:14,967 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4052 conditions, 916 events. 530/916 cut-off events. For 4335/4335 co-relation queries the response was YES. Maximal size of possible extension queue 67. Compared 4117 event pairs, 228 based on Foata normal form. 1/917 useless extension candidates. Maximal degree in co-relation 4008. Up to 508 conditions per place. [2024-10-11 14:26:14,971 INFO L140 encePairwiseOnDemand]: 18/28 looper letters, 58 selfloop transitions, 28 changer transitions 6/93 dead transitions. [2024-10-11 14:26:14,971 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 90 places, 93 transitions, 1040 flow [2024-10-11 14:26:14,971 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-10-11 14:26:14,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-10-11 14:26:14,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 90 transitions. [2024-10-11 14:26:14,972 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.35714285714285715 [2024-10-11 14:26:14,972 INFO L175 Difference]: Start difference. First operand has 83 places, 65 transitions, 720 flow. Second operand 9 states and 90 transitions. [2024-10-11 14:26:14,972 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 90 places, 93 transitions, 1040 flow [2024-10-11 14:26:14,978 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 83 places, 93 transitions, 966 flow, removed 8 selfloop flow, removed 7 redundant places. [2024-10-11 14:26:14,979 INFO L231 Difference]: Finished difference. Result has 86 places, 67 transitions, 749 flow [2024-10-11 14:26:14,979 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=654, PETRI_DIFFERENCE_MINUEND_PLACES=75, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=65, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=749, PETRI_PLACES=86, PETRI_TRANSITIONS=67} [2024-10-11 14:26:14,979 INFO L277 CegarLoopForPetriNet]: 26 programPoint places, 60 predicate places. [2024-10-11 14:26:14,979 INFO L471 AbstractCegarLoop]: Abstraction has has 86 places, 67 transitions, 749 flow [2024-10-11 14:26:14,979 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 5.0) internal successors, (50), 10 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 14:26:14,980 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 14:26:14,980 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 14:26:14,980 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-10-11 14:26:14,980 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-11 14:26:14,980 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 14:26:14,980 INFO L85 PathProgramCache]: Analyzing trace with hash -292405266, now seen corresponding path program 8 times [2024-10-11 14:26:14,980 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 14:26:14,980 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1656358544] [2024-10-11 14:26:14,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 14:26:14,981 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 14:26:14,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 14:26:15,278 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-11 14:26:15,279 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 14:26:15,279 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1656358544] [2024-10-11 14:26:15,279 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1656358544] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-11 14:26:15,279 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1085725482] [2024-10-11 14:26:15,279 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-11 14:26:15,279 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 14:26:15,279 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 14:26:15,281 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-11 14:26:15,284 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-10-11 14:26:15,346 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2024-10-11 14:26:15,347 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-11 14:26:15,348 INFO L255 TraceCheckSpWp]: Trace formula consists of 186 conjuncts, 19 conjuncts are in the unsatisfiable core [2024-10-11 14:26:15,350 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 14:26:15,421 INFO L349 Elim1Store]: treesize reduction 3, result has 75.0 percent of original size [2024-10-11 14:26:15,421 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 39 treesize of output 24 [2024-10-11 14:26:15,446 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-10-11 14:26:15,446 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-10-11 14:26:15,446 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1085725482] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-11 14:26:15,446 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-10-11 14:26:15,446 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [9] total 15 [2024-10-11 14:26:15,446 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [469411307] [2024-10-11 14:26:15,446 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-11 14:26:15,447 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-10-11 14:26:15,447 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 14:26:15,447 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-10-11 14:26:15,447 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2024-10-11 14:26:15,447 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 28 [2024-10-11 14:26:15,447 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 67 transitions, 749 flow. Second operand has 7 states, 7 states have (on average 5.857142857142857) internal successors, (41), 7 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 14:26:15,447 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 14:26:15,447 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 28 [2024-10-11 14:26:15,447 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 14:26:15,684 INFO L124 PetriNetUnfolderBase]: 697/1206 cut-off events. [2024-10-11 14:26:15,686 INFO L125 PetriNetUnfolderBase]: For 5773/5773 co-relation queries the response was YES. [2024-10-11 14:26:15,688 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5355 conditions, 1206 events. 697/1206 cut-off events. For 5773/5773 co-relation queries the response was YES. Maximal size of possible extension queue 80. Compared 5764 event pairs, 270 based on Foata normal form. 1/1207 useless extension candidates. Maximal degree in co-relation 5309. Up to 699 conditions per place. [2024-10-11 14:26:15,696 INFO L140 encePairwiseOnDemand]: 20/28 looper letters, 88 selfloop transitions, 29 changer transitions 6/124 dead transitions. [2024-10-11 14:26:15,696 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 91 places, 124 transitions, 1402 flow [2024-10-11 14:26:15,697 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-10-11 14:26:15,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-10-11 14:26:15,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 90 transitions. [2024-10-11 14:26:15,698 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.45918367346938777 [2024-10-11 14:26:15,698 INFO L175 Difference]: Start difference. First operand has 86 places, 67 transitions, 749 flow. Second operand 7 states and 90 transitions. [2024-10-11 14:26:15,698 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 91 places, 124 transitions, 1402 flow [2024-10-11 14:26:15,706 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 86 places, 124 transitions, 1352 flow, removed 3 selfloop flow, removed 5 redundant places. [2024-10-11 14:26:15,709 INFO L231 Difference]: Finished difference. Result has 90 places, 77 transitions, 934 flow [2024-10-11 14:26:15,710 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=717, PETRI_DIFFERENCE_MINUEND_PLACES=80, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=67, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=934, PETRI_PLACES=90, PETRI_TRANSITIONS=77} [2024-10-11 14:26:15,710 INFO L277 CegarLoopForPetriNet]: 26 programPoint places, 64 predicate places. [2024-10-11 14:26:15,710 INFO L471 AbstractCegarLoop]: Abstraction has has 90 places, 77 transitions, 934 flow [2024-10-11 14:26:15,710 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 5.857142857142857) internal successors, (41), 7 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 14:26:15,710 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 14:26:15,711 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 14:26:15,723 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2024-10-11 14:26:15,914 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,10 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 14:26:15,914 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-11 14:26:15,915 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 14:26:15,915 INFO L85 PathProgramCache]: Analyzing trace with hash -1659732378, now seen corresponding path program 9 times [2024-10-11 14:26:15,915 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 14:26:15,915 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1509434418] [2024-10-11 14:26:15,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 14:26:15,915 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 14:26:15,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 14:26:16,282 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 14:26:16,282 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 14:26:16,282 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1509434418] [2024-10-11 14:26:16,283 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1509434418] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-11 14:26:16,283 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1872584375] [2024-10-11 14:26:16,283 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-10-11 14:26:16,283 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 14:26:16,283 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 14:26:16,284 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-11 14:26:16,285 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-10-11 14:26:16,350 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2024-10-11 14:26:16,350 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-11 14:26:16,351 INFO L255 TraceCheckSpWp]: Trace formula consists of 186 conjuncts, 19 conjuncts are in the unsatisfiable core [2024-10-11 14:26:16,352 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 14:26:16,423 INFO L349 Elim1Store]: treesize reduction 3, result has 75.0 percent of original size [2024-10-11 14:26:16,423 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 39 treesize of output 24 [2024-10-11 14:26:16,447 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-10-11 14:26:16,447 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-10-11 14:26:16,447 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1872584375] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-11 14:26:16,448 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-10-11 14:26:16,448 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [11] total 17 [2024-10-11 14:26:16,448 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [893568943] [2024-10-11 14:26:16,448 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-11 14:26:16,448 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-10-11 14:26:16,449 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 14:26:16,449 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-10-11 14:26:16,449 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=221, Unknown=0, NotChecked=0, Total=272 [2024-10-11 14:26:16,450 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 28 [2024-10-11 14:26:16,450 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 90 places, 77 transitions, 934 flow. Second operand has 7 states, 7 states have (on average 5.857142857142857) internal successors, (41), 7 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 14:26:16,450 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 14:26:16,450 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 28 [2024-10-11 14:26:16,450 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 14:26:16,667 INFO L124 PetriNetUnfolderBase]: 693/1200 cut-off events. [2024-10-11 14:26:16,668 INFO L125 PetriNetUnfolderBase]: For 6946/6946 co-relation queries the response was YES. [2024-10-11 14:26:16,672 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5714 conditions, 1200 events. 693/1200 cut-off events. For 6946/6946 co-relation queries the response was YES. Maximal size of possible extension queue 80. Compared 5699 event pairs, 275 based on Foata normal form. 2/1201 useless extension candidates. Maximal degree in co-relation 5666. Up to 699 conditions per place. [2024-10-11 14:26:16,677 INFO L140 encePairwiseOnDemand]: 20/28 looper letters, 83 selfloop transitions, 29 changer transitions 7/120 dead transitions. [2024-10-11 14:26:16,677 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 95 places, 120 transitions, 1468 flow [2024-10-11 14:26:16,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-10-11 14:26:16,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-10-11 14:26:16,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 87 transitions. [2024-10-11 14:26:16,678 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.44387755102040816 [2024-10-11 14:26:16,678 INFO L175 Difference]: Start difference. First operand has 90 places, 77 transitions, 934 flow. Second operand 7 states and 87 transitions. [2024-10-11 14:26:16,678 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 95 places, 120 transitions, 1468 flow [2024-10-11 14:26:16,692 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 93 places, 120 transitions, 1395 flow, removed 25 selfloop flow, removed 2 redundant places. [2024-10-11 14:26:16,694 INFO L231 Difference]: Finished difference. Result has 98 places, 86 transitions, 1110 flow [2024-10-11 14:26:16,694 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=887, PETRI_DIFFERENCE_MINUEND_PLACES=87, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=77, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1110, PETRI_PLACES=98, PETRI_TRANSITIONS=86} [2024-10-11 14:26:16,695 INFO L277 CegarLoopForPetriNet]: 26 programPoint places, 72 predicate places. [2024-10-11 14:26:16,695 INFO L471 AbstractCegarLoop]: Abstraction has has 98 places, 86 transitions, 1110 flow [2024-10-11 14:26:16,695 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 5.857142857142857) internal successors, (41), 7 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 14:26:16,695 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 14:26:16,696 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 14:26:16,715 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2024-10-11 14:26:16,899 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,11 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 14:26:16,900 INFO L396 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-11 14:26:16,900 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 14:26:16,900 INFO L85 PathProgramCache]: Analyzing trace with hash -2015334144, now seen corresponding path program 10 times [2024-10-11 14:26:16,900 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 14:26:16,900 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1313710657] [2024-10-11 14:26:16,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 14:26:16,901 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 14:26:16,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 14:26:17,224 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 14:26:17,224 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 14:26:17,224 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1313710657] [2024-10-11 14:26:17,224 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1313710657] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-11 14:26:17,225 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1157903410] [2024-10-11 14:26:17,225 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-10-11 14:26:17,225 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 14:26:17,225 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 14:26:17,226 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-11 14:26:17,227 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-10-11 14:26:17,289 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-10-11 14:26:17,289 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-11 14:26:17,290 INFO L255 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 29 conjuncts are in the unsatisfiable core [2024-10-11 14:26:17,295 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 14:26:17,401 INFO L349 Elim1Store]: treesize reduction 3, result has 75.0 percent of original size [2024-10-11 14:26:17,401 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 39 treesize of output 24 [2024-10-11 14:26:17,424 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-10-11 14:26:17,424 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-10-11 14:26:17,424 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1157903410] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-11 14:26:17,424 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-10-11 14:26:17,424 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [10] total 17 [2024-10-11 14:26:17,425 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1499097139] [2024-10-11 14:26:17,425 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-11 14:26:17,425 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-10-11 14:26:17,425 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 14:26:17,425 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-10-11 14:26:17,425 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=246, Unknown=0, NotChecked=0, Total=306 [2024-10-11 14:26:17,426 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 28 [2024-10-11 14:26:17,426 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 98 places, 86 transitions, 1110 flow. Second operand has 9 states, 9 states have (on average 5.222222222222222) internal successors, (47), 9 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 14:26:17,426 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 14:26:17,426 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 28 [2024-10-11 14:26:17,426 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 14:26:17,683 INFO L124 PetriNetUnfolderBase]: 707/1232 cut-off events. [2024-10-11 14:26:17,683 INFO L125 PetriNetUnfolderBase]: For 7695/7695 co-relation queries the response was YES. [2024-10-11 14:26:17,687 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6078 conditions, 1232 events. 707/1232 cut-off events. For 7695/7695 co-relation queries the response was YES. Maximal size of possible extension queue 87. Compared 5954 event pairs, 287 based on Foata normal form. 1/1232 useless extension candidates. Maximal degree in co-relation 6025. Up to 692 conditions per place. [2024-10-11 14:26:17,690 INFO L140 encePairwiseOnDemand]: 18/28 looper letters, 83 selfloop transitions, 34 changer transitions 6/124 dead transitions. [2024-10-11 14:26:17,690 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 105 places, 124 transitions, 1580 flow [2024-10-11 14:26:17,691 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-10-11 14:26:17,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-10-11 14:26:17,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 96 transitions. [2024-10-11 14:26:17,691 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.38095238095238093 [2024-10-11 14:26:17,691 INFO L175 Difference]: Start difference. First operand has 98 places, 86 transitions, 1110 flow. Second operand 9 states and 96 transitions. [2024-10-11 14:26:17,692 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 105 places, 124 transitions, 1580 flow [2024-10-11 14:26:17,704 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 103 places, 124 transitions, 1516 flow, removed 22 selfloop flow, removed 2 redundant places. [2024-10-11 14:26:17,706 INFO L231 Difference]: Finished difference. Result has 107 places, 91 transitions, 1232 flow [2024-10-11 14:26:17,706 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=1062, PETRI_DIFFERENCE_MINUEND_PLACES=95, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=86, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1232, PETRI_PLACES=107, PETRI_TRANSITIONS=91} [2024-10-11 14:26:17,707 INFO L277 CegarLoopForPetriNet]: 26 programPoint places, 81 predicate places. [2024-10-11 14:26:17,707 INFO L471 AbstractCegarLoop]: Abstraction has has 107 places, 91 transitions, 1232 flow [2024-10-11 14:26:17,707 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 5.222222222222222) internal successors, (47), 9 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 14:26:17,707 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 14:26:17,707 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 14:26:17,719 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2024-10-11 14:26:17,908 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2024-10-11 14:26:17,908 INFO L396 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-11 14:26:17,908 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 14:26:17,909 INFO L85 PathProgramCache]: Analyzing trace with hash -90853982, now seen corresponding path program 11 times [2024-10-11 14:26:17,909 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 14:26:17,909 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [805518137] [2024-10-11 14:26:17,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 14:26:17,909 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 14:26:17,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 14:26:18,202 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-11 14:26:18,202 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 14:26:18,202 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [805518137] [2024-10-11 14:26:18,202 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [805518137] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-11 14:26:18,202 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1728960105] [2024-10-11 14:26:18,202 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-10-11 14:26:18,203 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 14:26:18,203 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 14:26:18,204 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-11 14:26:18,205 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-10-11 14:26:18,269 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-11 14:26:18,270 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-11 14:26:18,271 INFO L255 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 29 conjuncts are in the unsatisfiable core [2024-10-11 14:26:18,271 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 14:26:18,379 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-10-11 14:26:18,379 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 39 treesize of output 19 [2024-10-11 14:26:18,405 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-10-11 14:26:18,406 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-10-11 14:26:18,406 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1728960105] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-11 14:26:18,406 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-10-11 14:26:18,406 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [10] total 13 [2024-10-11 14:26:18,406 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1097423160] [2024-10-11 14:26:18,406 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-11 14:26:18,406 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-10-11 14:26:18,407 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 14:26:18,407 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-10-11 14:26:18,407 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2024-10-11 14:26:18,407 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 28 [2024-10-11 14:26:18,407 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 107 places, 91 transitions, 1232 flow. Second operand has 10 states, 10 states have (on average 5.0) internal successors, (50), 10 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 14:26:18,407 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 14:26:18,407 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 28 [2024-10-11 14:26:18,408 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 14:26:18,688 INFO L124 PetriNetUnfolderBase]: 698/1210 cut-off events. [2024-10-11 14:26:18,688 INFO L125 PetriNetUnfolderBase]: For 8188/8188 co-relation queries the response was YES. [2024-10-11 14:26:18,691 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6095 conditions, 1210 events. 698/1210 cut-off events. For 8188/8188 co-relation queries the response was YES. Maximal size of possible extension queue 86. Compared 5774 event pairs, 279 based on Foata normal form. 1/1211 useless extension candidates. Maximal degree in co-relation 6038. Up to 692 conditions per place. [2024-10-11 14:26:18,694 INFO L140 encePairwiseOnDemand]: 18/28 looper letters, 83 selfloop transitions, 34 changer transitions 6/124 dead transitions. [2024-10-11 14:26:18,694 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 114 places, 124 transitions, 1656 flow [2024-10-11 14:26:18,694 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-10-11 14:26:18,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-10-11 14:26:18,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 96 transitions. [2024-10-11 14:26:18,695 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.38095238095238093 [2024-10-11 14:26:18,695 INFO L175 Difference]: Start difference. First operand has 107 places, 91 transitions, 1232 flow. Second operand 9 states and 96 transitions. [2024-10-11 14:26:18,695 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 114 places, 124 transitions, 1656 flow [2024-10-11 14:26:18,706 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 109 places, 124 transitions, 1598 flow, removed 5 selfloop flow, removed 5 redundant places. [2024-10-11 14:26:18,708 INFO L231 Difference]: Finished difference. Result has 112 places, 93 transitions, 1295 flow [2024-10-11 14:26:18,708 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=1179, PETRI_DIFFERENCE_MINUEND_PLACES=101, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=91, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1295, PETRI_PLACES=112, PETRI_TRANSITIONS=93} [2024-10-11 14:26:18,708 INFO L277 CegarLoopForPetriNet]: 26 programPoint places, 86 predicate places. [2024-10-11 14:26:18,708 INFO L471 AbstractCegarLoop]: Abstraction has has 112 places, 93 transitions, 1295 flow [2024-10-11 14:26:18,708 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 5.0) internal successors, (50), 10 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 14:26:18,708 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 14:26:18,709 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 14:26:18,720 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2024-10-11 14:26:18,909 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,13 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 14:26:18,909 INFO L396 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-11 14:26:18,909 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 14:26:18,909 INFO L85 PathProgramCache]: Analyzing trace with hash -1802163952, now seen corresponding path program 12 times [2024-10-11 14:26:18,909 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 14:26:18,909 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [594782661] [2024-10-11 14:26:18,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 14:26:18,910 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 14:26:18,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 14:26:19,117 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-10-11 14:26:19,117 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 14:26:19,117 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [594782661] [2024-10-11 14:26:19,117 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [594782661] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-11 14:26:19,117 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-11 14:26:19,117 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-10-11 14:26:19,117 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [285144958] [2024-10-11 14:26:19,117 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-11 14:26:19,117 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-10-11 14:26:19,118 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 14:26:19,118 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-10-11 14:26:19,118 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-10-11 14:26:19,118 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 28 [2024-10-11 14:26:19,118 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 112 places, 93 transitions, 1295 flow. Second operand has 9 states, 9 states have (on average 5.222222222222222) internal successors, (47), 9 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 14:26:19,118 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 14:26:19,118 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 28 [2024-10-11 14:26:19,118 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 14:26:19,375 INFO L124 PetriNetUnfolderBase]: 689/1188 cut-off events. [2024-10-11 14:26:19,375 INFO L125 PetriNetUnfolderBase]: For 8166/8166 co-relation queries the response was YES. [2024-10-11 14:26:19,378 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6100 conditions, 1188 events. 689/1188 cut-off events. For 8166/8166 co-relation queries the response was YES. Maximal size of possible extension queue 85. Compared 5594 event pairs, 166 based on Foata normal form. 1/1189 useless extension candidates. Maximal degree in co-relation 6041. Up to 687 conditions per place. [2024-10-11 14:26:19,381 INFO L140 encePairwiseOnDemand]: 18/28 looper letters, 83 selfloop transitions, 33 changer transitions 6/123 dead transitions. [2024-10-11 14:26:19,381 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 120 places, 123 transitions, 1678 flow [2024-10-11 14:26:19,382 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-10-11 14:26:19,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-10-11 14:26:19,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 93 transitions. [2024-10-11 14:26:19,382 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.33214285714285713 [2024-10-11 14:26:19,382 INFO L175 Difference]: Start difference. First operand has 112 places, 93 transitions, 1295 flow. Second operand 10 states and 93 transitions. [2024-10-11 14:26:19,382 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 120 places, 123 transitions, 1678 flow [2024-10-11 14:26:19,393 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 115 places, 123 transitions, 1615 flow, removed 7 selfloop flow, removed 5 redundant places. [2024-10-11 14:26:19,396 INFO L231 Difference]: Finished difference. Result has 117 places, 93 transitions, 1310 flow [2024-10-11 14:26:19,396 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=1235, PETRI_DIFFERENCE_MINUEND_PLACES=106, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=93, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1310, PETRI_PLACES=117, PETRI_TRANSITIONS=93} [2024-10-11 14:26:19,397 INFO L277 CegarLoopForPetriNet]: 26 programPoint places, 91 predicate places. [2024-10-11 14:26:19,397 INFO L471 AbstractCegarLoop]: Abstraction has has 117 places, 93 transitions, 1310 flow [2024-10-11 14:26:19,397 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 5.222222222222222) internal successors, (47), 9 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 14:26:19,397 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 14:26:19,397 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 14:26:19,397 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2024-10-11 14:26:19,397 INFO L396 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-11 14:26:19,398 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 14:26:19,398 INFO L85 PathProgramCache]: Analyzing trace with hash -127577951, now seen corresponding path program 1 times [2024-10-11 14:26:19,398 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 14:26:19,398 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [391223232] [2024-10-11 14:26:19,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 14:26:19,398 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 14:26:19,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 14:26:19,577 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-10-11 14:26:19,578 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 14:26:19,578 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [391223232] [2024-10-11 14:26:19,578 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [391223232] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-11 14:26:19,578 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1565250347] [2024-10-11 14:26:19,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 14:26:19,578 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 14:26:19,579 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 14:26:19,580 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-11 14:26:19,581 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-10-11 14:26:19,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 14:26:19,649 INFO L255 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 15 conjuncts are in the unsatisfiable core [2024-10-11 14:26:19,650 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 14:26:19,688 INFO L349 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2024-10-11 14:26:19,689 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 26 treesize of output 10 [2024-10-11 14:26:19,694 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-10-11 14:26:19,694 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-11 14:26:19,749 INFO L349 Elim1Store]: treesize reduction 28, result has 59.4 percent of original size [2024-10-11 14:26:19,749 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 32 treesize of output 48 [2024-10-11 14:26:19,759 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-10-11 14:26:19,759 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1565250347] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-11 14:26:19,759 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-11 14:26:19,759 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 7] total 17 [2024-10-11 14:26:19,759 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1042234122] [2024-10-11 14:26:19,759 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-11 14:26:19,760 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-10-11 14:26:19,760 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 14:26:19,760 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-10-11 14:26:19,760 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=217, Unknown=0, NotChecked=0, Total=272 [2024-10-11 14:26:19,760 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 28 [2024-10-11 14:26:19,760 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 117 places, 93 transitions, 1310 flow. Second operand has 17 states, 17 states have (on average 5.529411764705882) internal successors, (94), 17 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 14:26:19,760 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 14:26:19,760 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 28 [2024-10-11 14:26:19,760 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 14:26:20,052 INFO L124 PetriNetUnfolderBase]: 720/1236 cut-off events. [2024-10-11 14:26:20,053 INFO L125 PetriNetUnfolderBase]: For 8972/8972 co-relation queries the response was YES. [2024-10-11 14:26:20,056 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6368 conditions, 1236 events. 720/1236 cut-off events. For 8972/8972 co-relation queries the response was YES. Maximal size of possible extension queue 90. Compared 6101 event pairs, 88 based on Foata normal form. 14/1250 useless extension candidates. Maximal degree in co-relation 6307. Up to 643 conditions per place. [2024-10-11 14:26:20,059 INFO L140 encePairwiseOnDemand]: 17/28 looper letters, 104 selfloop transitions, 40 changer transitions 0/145 dead transitions. [2024-10-11 14:26:20,059 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 125 places, 145 transitions, 1929 flow [2024-10-11 14:26:20,060 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-10-11 14:26:20,060 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-10-11 14:26:20,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 106 transitions. [2024-10-11 14:26:20,061 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.37857142857142856 [2024-10-11 14:26:20,061 INFO L175 Difference]: Start difference. First operand has 117 places, 93 transitions, 1310 flow. Second operand 10 states and 106 transitions. [2024-10-11 14:26:20,061 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 125 places, 145 transitions, 1929 flow [2024-10-11 14:26:20,074 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 117 places, 145 transitions, 1870 flow, removed 6 selfloop flow, removed 8 redundant places. [2024-10-11 14:26:20,076 INFO L231 Difference]: Finished difference. Result has 119 places, 95 transitions, 1374 flow [2024-10-11 14:26:20,076 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=1259, PETRI_DIFFERENCE_MINUEND_PLACES=108, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=93, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1374, PETRI_PLACES=119, PETRI_TRANSITIONS=95} [2024-10-11 14:26:20,076 INFO L277 CegarLoopForPetriNet]: 26 programPoint places, 93 predicate places. [2024-10-11 14:26:20,076 INFO L471 AbstractCegarLoop]: Abstraction has has 119 places, 95 transitions, 1374 flow [2024-10-11 14:26:20,076 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 5.529411764705882) internal successors, (94), 17 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 14:26:20,077 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 14:26:20,077 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 14:26:20,089 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2024-10-11 14:26:20,277 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,14 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 14:26:20,277 INFO L396 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-11 14:26:20,278 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 14:26:20,278 INFO L85 PathProgramCache]: Analyzing trace with hash -1112436069, now seen corresponding path program 1 times [2024-10-11 14:26:20,278 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 14:26:20,278 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1861951533] [2024-10-11 14:26:20,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 14:26:20,278 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 14:26:20,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 14:26:20,486 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-10-11 14:26:20,486 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 14:26:20,486 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1861951533] [2024-10-11 14:26:20,487 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1861951533] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-11 14:26:20,487 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-11 14:26:20,487 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-10-11 14:26:20,487 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1256115369] [2024-10-11 14:26:20,487 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-11 14:26:20,487 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-10-11 14:26:20,488 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 14:26:20,488 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-10-11 14:26:20,489 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2024-10-11 14:26:20,489 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 28 [2024-10-11 14:26:20,489 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 119 places, 95 transitions, 1374 flow. Second operand has 10 states, 10 states have (on average 5.1) internal successors, (51), 10 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 14:26:20,489 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 14:26:20,489 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 28 [2024-10-11 14:26:20,490 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 14:26:20,769 INFO L124 PetriNetUnfolderBase]: 780/1352 cut-off events. [2024-10-11 14:26:20,770 INFO L125 PetriNetUnfolderBase]: For 10294/10294 co-relation queries the response was YES. [2024-10-11 14:26:20,774 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7177 conditions, 1352 events. 780/1352 cut-off events. For 10294/10294 co-relation queries the response was YES. Maximal size of possible extension queue 97. Compared 6700 event pairs, 327 based on Foata normal form. 12/1364 useless extension candidates. Maximal degree in co-relation 7117. Up to 764 conditions per place. [2024-10-11 14:26:20,777 INFO L140 encePairwiseOnDemand]: 18/28 looper letters, 91 selfloop transitions, 43 changer transitions 0/135 dead transitions. [2024-10-11 14:26:20,777 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 127 places, 135 transitions, 1876 flow [2024-10-11 14:26:20,778 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-10-11 14:26:20,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-10-11 14:26:20,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 104 transitions. [2024-10-11 14:26:20,778 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4126984126984127 [2024-10-11 14:26:20,778 INFO L175 Difference]: Start difference. First operand has 119 places, 95 transitions, 1374 flow. Second operand 9 states and 104 transitions. [2024-10-11 14:26:20,778 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 127 places, 135 transitions, 1876 flow [2024-10-11 14:26:20,790 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 120 places, 135 transitions, 1764 flow, removed 9 selfloop flow, removed 7 redundant places. [2024-10-11 14:26:20,792 INFO L231 Difference]: Finished difference. Result has 122 places, 98 transitions, 1417 flow [2024-10-11 14:26:20,793 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=1272, PETRI_DIFFERENCE_MINUEND_PLACES=112, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=95, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1417, PETRI_PLACES=122, PETRI_TRANSITIONS=98} [2024-10-11 14:26:20,793 INFO L277 CegarLoopForPetriNet]: 26 programPoint places, 96 predicate places. [2024-10-11 14:26:20,793 INFO L471 AbstractCegarLoop]: Abstraction has has 122 places, 98 transitions, 1417 flow [2024-10-11 14:26:20,793 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 5.1) internal successors, (51), 10 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 14:26:20,795 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 14:26:20,795 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 14:26:20,795 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2024-10-11 14:26:20,795 INFO L396 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-11 14:26:20,795 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 14:26:20,795 INFO L85 PathProgramCache]: Analyzing trace with hash -226551663, now seen corresponding path program 2 times [2024-10-11 14:26:20,795 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 14:26:20,796 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [130877932] [2024-10-11 14:26:20,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 14:26:20,796 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 14:26:20,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 14:26:20,982 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-10-11 14:26:20,982 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 14:26:20,982 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [130877932] [2024-10-11 14:26:20,982 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [130877932] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-11 14:26:20,982 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-11 14:26:20,982 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-10-11 14:26:20,983 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [290225044] [2024-10-11 14:26:20,983 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-11 14:26:20,983 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-10-11 14:26:20,983 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 14:26:20,983 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-10-11 14:26:20,983 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-10-11 14:26:20,983 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 28 [2024-10-11 14:26:20,983 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 122 places, 98 transitions, 1417 flow. Second operand has 10 states, 10 states have (on average 5.1) internal successors, (51), 10 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 14:26:20,984 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 14:26:20,984 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 28 [2024-10-11 14:26:20,984 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 14:26:21,244 INFO L124 PetriNetUnfolderBase]: 775/1347 cut-off events. [2024-10-11 14:26:21,244 INFO L125 PetriNetUnfolderBase]: For 9180/9180 co-relation queries the response was YES. [2024-10-11 14:26:21,249 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7047 conditions, 1347 events. 775/1347 cut-off events. For 9180/9180 co-relation queries the response was YES. Maximal size of possible extension queue 97. Compared 6793 event pairs, 290 based on Foata normal form. 5/1352 useless extension candidates. Maximal degree in co-relation 6987. Up to 764 conditions per place. [2024-10-11 14:26:21,254 INFO L140 encePairwiseOnDemand]: 19/28 looper letters, 88 selfloop transitions, 39 changer transitions 10/138 dead transitions. [2024-10-11 14:26:21,254 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 130 places, 138 transitions, 1892 flow [2024-10-11 14:26:21,254 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-10-11 14:26:21,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-10-11 14:26:21,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 93 transitions. [2024-10-11 14:26:21,255 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.36904761904761907 [2024-10-11 14:26:21,255 INFO L175 Difference]: Start difference. First operand has 122 places, 98 transitions, 1417 flow. Second operand 9 states and 93 transitions. [2024-10-11 14:26:21,255 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 130 places, 138 transitions, 1892 flow [2024-10-11 14:26:21,279 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 124 places, 138 transitions, 1816 flow, removed 7 selfloop flow, removed 6 redundant places. [2024-10-11 14:26:21,281 INFO L231 Difference]: Finished difference. Result has 125 places, 96 transitions, 1377 flow [2024-10-11 14:26:21,282 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=1321, PETRI_DIFFERENCE_MINUEND_PLACES=116, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=97, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1377, PETRI_PLACES=125, PETRI_TRANSITIONS=96} [2024-10-11 14:26:21,282 INFO L277 CegarLoopForPetriNet]: 26 programPoint places, 99 predicate places. [2024-10-11 14:26:21,282 INFO L471 AbstractCegarLoop]: Abstraction has has 125 places, 96 transitions, 1377 flow [2024-10-11 14:26:21,282 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 5.1) internal successors, (51), 10 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 14:26:21,282 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 14:26:21,283 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 14:26:21,283 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2024-10-11 14:26:21,283 INFO L396 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-11 14:26:21,283 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 14:26:21,283 INFO L85 PathProgramCache]: Analyzing trace with hash -1851301303, now seen corresponding path program 3 times [2024-10-11 14:26:21,283 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 14:26:21,284 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1907660513] [2024-10-11 14:26:21,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 14:26:21,284 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 14:26:21,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 14:26:21,493 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-10-11 14:26:21,493 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 14:26:21,493 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1907660513] [2024-10-11 14:26:21,494 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1907660513] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-11 14:26:21,494 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1201289943] [2024-10-11 14:26:21,494 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-10-11 14:26:21,494 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 14:26:21,494 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 14:26:21,495 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-11 14:26:21,496 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2024-10-11 14:26:21,568 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-10-11 14:26:21,568 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-11 14:26:21,569 INFO L255 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 25 conjuncts are in the unsatisfiable core [2024-10-11 14:26:21,570 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 14:26:21,626 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-11 14:26:21,626 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 29 treesize of output 21 [2024-10-11 14:26:21,640 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-10-11 14:26:21,640 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-11 14:26:21,704 INFO L349 Elim1Store]: treesize reduction 28, result has 59.4 percent of original size [2024-10-11 14:26:21,704 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 32 treesize of output 48 [2024-10-11 14:26:21,721 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-10-11 14:26:21,721 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1201289943] provided 1 perfect and 1 imperfect interpolant sequences [2024-10-11 14:26:21,721 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-10-11 14:26:21,721 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [9, 9] total 18 [2024-10-11 14:26:21,722 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1876804684] [2024-10-11 14:26:21,722 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-11 14:26:21,722 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-10-11 14:26:21,722 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 14:26:21,722 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-10-11 14:26:21,722 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=235, Unknown=0, NotChecked=0, Total=306 [2024-10-11 14:26:21,722 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 28 [2024-10-11 14:26:21,722 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 125 places, 96 transitions, 1377 flow. Second operand has 7 states, 7 states have (on average 6.0) internal successors, (42), 7 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 14:26:21,722 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 14:26:21,722 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 28 [2024-10-11 14:26:21,723 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 14:26:21,983 INFO L124 PetriNetUnfolderBase]: 813/1423 cut-off events. [2024-10-11 14:26:21,983 INFO L125 PetriNetUnfolderBase]: For 9465/9465 co-relation queries the response was YES. [2024-10-11 14:26:21,988 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7365 conditions, 1423 events. 813/1423 cut-off events. For 9465/9465 co-relation queries the response was YES. Maximal size of possible extension queue 103. Compared 7261 event pairs, 312 based on Foata normal form. 12/1435 useless extension candidates. Maximal degree in co-relation 7305. Up to 783 conditions per place. [2024-10-11 14:26:21,991 INFO L140 encePairwiseOnDemand]: 20/28 looper letters, 102 selfloop transitions, 38 changer transitions 0/141 dead transitions. [2024-10-11 14:26:21,991 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 128 places, 141 transitions, 1915 flow [2024-10-11 14:26:21,992 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-10-11 14:26:21,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-10-11 14:26:21,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 96 transitions. [2024-10-11 14:26:21,992 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4897959183673469 [2024-10-11 14:26:21,992 INFO L175 Difference]: Start difference. First operand has 125 places, 96 transitions, 1377 flow. Second operand 7 states and 96 transitions. [2024-10-11 14:26:21,993 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 128 places, 141 transitions, 1915 flow [2024-10-11 14:26:22,006 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 121 places, 141 transitions, 1805 flow, removed 15 selfloop flow, removed 7 redundant places. [2024-10-11 14:26:22,007 INFO L231 Difference]: Finished difference. Result has 123 places, 99 transitions, 1416 flow [2024-10-11 14:26:22,007 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=1283, PETRI_DIFFERENCE_MINUEND_PLACES=115, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=96, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1416, PETRI_PLACES=123, PETRI_TRANSITIONS=99} [2024-10-11 14:26:22,008 INFO L277 CegarLoopForPetriNet]: 26 programPoint places, 97 predicate places. [2024-10-11 14:26:22,008 INFO L471 AbstractCegarLoop]: Abstraction has has 123 places, 99 transitions, 1416 flow [2024-10-11 14:26:22,008 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 6.0) internal successors, (42), 7 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 14:26:22,008 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 14:26:22,008 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 14:26:22,020 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2024-10-11 14:26:22,208 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2024-10-11 14:26:22,209 INFO L396 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-11 14:26:22,209 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 14:26:22,209 INFO L85 PathProgramCache]: Analyzing trace with hash 1511752797, now seen corresponding path program 2 times [2024-10-11 14:26:22,209 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 14:26:22,209 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1514443987] [2024-10-11 14:26:22,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 14:26:22,209 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 14:26:22,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 14:26:22,399 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-10-11 14:26:22,399 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 14:26:22,399 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1514443987] [2024-10-11 14:26:22,399 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1514443987] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-11 14:26:22,399 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [163653959] [2024-10-11 14:26:22,399 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-11 14:26:22,399 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 14:26:22,400 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 14:26:22,401 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-11 14:26:22,402 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2024-10-11 14:26:22,464 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-11 14:26:22,464 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-11 14:26:22,465 INFO L255 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 25 conjuncts are in the unsatisfiable core [2024-10-11 14:26:22,465 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 14:26:22,525 INFO L349 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2024-10-11 14:26:22,525 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 26 treesize of output 10 [2024-10-11 14:26:22,530 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-10-11 14:26:22,530 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-11 14:26:22,587 INFO L349 Elim1Store]: treesize reduction 28, result has 59.4 percent of original size [2024-10-11 14:26:22,588 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 32 treesize of output 48 [2024-10-11 14:26:22,601 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-10-11 14:26:22,601 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [163653959] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-11 14:26:22,601 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-11 14:26:22,601 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 7] total 17 [2024-10-11 14:26:22,601 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [513089840] [2024-10-11 14:26:22,601 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-11 14:26:22,601 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-10-11 14:26:22,602 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 14:26:22,602 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-10-11 14:26:22,602 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=212, Unknown=0, NotChecked=0, Total=272 [2024-10-11 14:26:22,602 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 28 [2024-10-11 14:26:22,602 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 123 places, 99 transitions, 1416 flow. Second operand has 17 states, 17 states have (on average 5.470588235294118) internal successors, (93), 17 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 14:26:22,602 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 14:26:22,602 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 28 [2024-10-11 14:26:22,602 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 14:26:23,025 INFO L124 PetriNetUnfolderBase]: 1183/2066 cut-off events. [2024-10-11 14:26:23,025 INFO L125 PetriNetUnfolderBase]: For 11755/11755 co-relation queries the response was YES. [2024-10-11 14:26:23,031 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9862 conditions, 2066 events. 1183/2066 cut-off events. For 11755/11755 co-relation queries the response was YES. Maximal size of possible extension queue 129. Compared 11403 event pairs, 396 based on Foata normal form. 14/2079 useless extension candidates. Maximal degree in co-relation 9803. Up to 730 conditions per place. [2024-10-11 14:26:23,037 INFO L140 encePairwiseOnDemand]: 17/28 looper letters, 124 selfloop transitions, 51 changer transitions 0/176 dead transitions. [2024-10-11 14:26:23,037 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 134 places, 176 transitions, 2245 flow [2024-10-11 14:26:23,037 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-10-11 14:26:23,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-10-11 14:26:23,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 139 transitions. [2024-10-11 14:26:23,038 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.41369047619047616 [2024-10-11 14:26:23,038 INFO L175 Difference]: Start difference. First operand has 123 places, 99 transitions, 1416 flow. Second operand 12 states and 139 transitions. [2024-10-11 14:26:23,038 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 134 places, 176 transitions, 2245 flow [2024-10-11 14:26:23,055 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 132 places, 176 transitions, 2204 flow, removed 2 selfloop flow, removed 2 redundant places. [2024-10-11 14:26:23,057 INFO L231 Difference]: Finished difference. Result has 136 places, 107 transitions, 1618 flow [2024-10-11 14:26:23,057 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=1375, PETRI_DIFFERENCE_MINUEND_PLACES=121, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=99, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=1618, PETRI_PLACES=136, PETRI_TRANSITIONS=107} [2024-10-11 14:26:23,058 INFO L277 CegarLoopForPetriNet]: 26 programPoint places, 110 predicate places. [2024-10-11 14:26:23,058 INFO L471 AbstractCegarLoop]: Abstraction has has 136 places, 107 transitions, 1618 flow [2024-10-11 14:26:23,058 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 5.470588235294118) internal successors, (93), 17 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 14:26:23,058 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 14:26:23,058 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 14:26:23,070 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2024-10-11 14:26:23,258 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2024-10-11 14:26:23,259 INFO L396 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-11 14:26:23,259 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 14:26:23,259 INFO L85 PathProgramCache]: Analyzing trace with hash -2049108817, now seen corresponding path program 4 times [2024-10-11 14:26:23,259 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 14:26:23,259 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [140116989] [2024-10-11 14:26:23,259 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 14:26:23,259 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 14:26:23,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 14:26:23,443 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-10-11 14:26:23,443 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 14:26:23,443 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [140116989] [2024-10-11 14:26:23,443 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [140116989] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-11 14:26:23,443 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-11 14:26:23,443 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-10-11 14:26:23,443 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1113817739] [2024-10-11 14:26:23,443 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-11 14:26:23,444 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-10-11 14:26:23,444 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 14:26:23,444 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-10-11 14:26:23,444 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-10-11 14:26:23,444 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 28 [2024-10-11 14:26:23,444 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 136 places, 107 transitions, 1618 flow. Second operand has 10 states, 10 states have (on average 5.1) internal successors, (51), 10 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 14:26:23,444 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 14:26:23,444 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 28 [2024-10-11 14:26:23,444 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 14:26:23,743 INFO L124 PetriNetUnfolderBase]: 1178/2061 cut-off events. [2024-10-11 14:26:23,744 INFO L125 PetriNetUnfolderBase]: For 14382/14382 co-relation queries the response was YES. [2024-10-11 14:26:23,750 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10411 conditions, 2061 events. 1178/2061 cut-off events. For 14382/14382 co-relation queries the response was YES. Maximal size of possible extension queue 129. Compared 11329 event pairs, 600 based on Foata normal form. 5/2066 useless extension candidates. Maximal degree in co-relation 10346. Up to 1412 conditions per place. [2024-10-11 14:26:23,755 INFO L140 encePairwiseOnDemand]: 18/28 looper letters, 89 selfloop transitions, 43 changer transitions 4/137 dead transitions. [2024-10-11 14:26:23,755 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 144 places, 137 transitions, 2022 flow [2024-10-11 14:26:23,756 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-10-11 14:26:23,756 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-10-11 14:26:23,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 90 transitions. [2024-10-11 14:26:23,756 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.35714285714285715 [2024-10-11 14:26:23,756 INFO L175 Difference]: Start difference. First operand has 136 places, 107 transitions, 1618 flow. Second operand 9 states and 90 transitions. [2024-10-11 14:26:23,756 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 144 places, 137 transitions, 2022 flow [2024-10-11 14:26:23,779 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 136 places, 137 transitions, 1930 flow, removed 11 selfloop flow, removed 8 redundant places. [2024-10-11 14:26:23,781 INFO L231 Difference]: Finished difference. Result has 136 places, 105 transitions, 1574 flow [2024-10-11 14:26:23,781 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=1503, PETRI_DIFFERENCE_MINUEND_PLACES=128, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=106, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1574, PETRI_PLACES=136, PETRI_TRANSITIONS=105} [2024-10-11 14:26:23,782 INFO L277 CegarLoopForPetriNet]: 26 programPoint places, 110 predicate places. [2024-10-11 14:26:23,782 INFO L471 AbstractCegarLoop]: Abstraction has has 136 places, 105 transitions, 1574 flow [2024-10-11 14:26:23,782 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 5.1) internal successors, (51), 10 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 14:26:23,782 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 14:26:23,782 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 14:26:23,782 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2024-10-11 14:26:23,783 INFO L396 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-11 14:26:23,783 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 14:26:23,783 INFO L85 PathProgramCache]: Analyzing trace with hash 2058021563, now seen corresponding path program 3 times [2024-10-11 14:26:23,783 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 14:26:23,783 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [376093620] [2024-10-11 14:26:23,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 14:26:23,783 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 14:26:23,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 14:26:23,971 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-10-11 14:26:23,971 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 14:26:23,971 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [376093620] [2024-10-11 14:26:23,971 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [376093620] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-11 14:26:23,971 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1002717005] [2024-10-11 14:26:23,971 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-10-11 14:26:23,971 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 14:26:23,972 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 14:26:23,972 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-11 14:26:23,973 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2024-10-11 14:26:24,039 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-10-11 14:26:24,039 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-11 14:26:24,040 INFO L255 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 25 conjuncts are in the unsatisfiable core [2024-10-11 14:26:24,041 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 14:26:24,088 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-11 14:26:24,089 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 29 treesize of output 21 [2024-10-11 14:26:24,105 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-10-11 14:26:24,105 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-11 14:26:24,183 INFO L349 Elim1Store]: treesize reduction 28, result has 59.4 percent of original size [2024-10-11 14:26:24,183 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 32 treesize of output 48 [2024-10-11 14:26:24,203 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-10-11 14:26:24,203 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1002717005] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-11 14:26:24,204 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-11 14:26:24,204 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 7] total 18 [2024-10-11 14:26:24,204 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [468950697] [2024-10-11 14:26:24,204 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-11 14:26:24,204 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-10-11 14:26:24,204 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 14:26:24,204 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-10-11 14:26:24,204 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=241, Unknown=0, NotChecked=0, Total=306 [2024-10-11 14:26:24,205 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 28 [2024-10-11 14:26:24,205 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 136 places, 105 transitions, 1574 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) [2024-10-11 14:26:24,205 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 14:26:24,205 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 28 [2024-10-11 14:26:24,205 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 14:26:24,722 INFO L124 PetriNetUnfolderBase]: 1265/2229 cut-off events. [2024-10-11 14:26:24,722 INFO L125 PetriNetUnfolderBase]: For 13993/13993 co-relation queries the response was YES. [2024-10-11 14:26:24,729 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10706 conditions, 2229 events. 1265/2229 cut-off events. For 13993/13993 co-relation queries the response was YES. Maximal size of possible extension queue 136. Compared 12518 event pairs, 496 based on Foata normal form. 21/2250 useless extension candidates. Maximal degree in co-relation 10643. Up to 1016 conditions per place. [2024-10-11 14:26:24,735 INFO L140 encePairwiseOnDemand]: 17/28 looper letters, 128 selfloop transitions, 57 changer transitions 0/186 dead transitions. [2024-10-11 14:26:24,735 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 149 places, 186 transitions, 2396 flow [2024-10-11 14:26:24,736 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-10-11 14:26:24,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2024-10-11 14:26:24,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 155 transitions. [2024-10-11 14:26:24,737 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.36904761904761907 [2024-10-11 14:26:24,737 INFO L175 Difference]: Start difference. First operand has 136 places, 105 transitions, 1574 flow. Second operand 15 states and 155 transitions. [2024-10-11 14:26:24,737 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 149 places, 186 transitions, 2396 flow [2024-10-11 14:26:24,758 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 144 places, 186 transitions, 2331 flow, removed 8 selfloop flow, removed 5 redundant places. [2024-10-11 14:26:24,761 INFO L231 Difference]: Finished difference. Result has 149 places, 115 transitions, 1774 flow [2024-10-11 14:26:24,761 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=1515, PETRI_DIFFERENCE_MINUEND_PLACES=130, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=105, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=49, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=1774, PETRI_PLACES=149, PETRI_TRANSITIONS=115} [2024-10-11 14:26:24,761 INFO L277 CegarLoopForPetriNet]: 26 programPoint places, 123 predicate places. [2024-10-11 14:26:24,761 INFO L471 AbstractCegarLoop]: Abstraction has has 149 places, 115 transitions, 1774 flow [2024-10-11 14:26:24,761 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) [2024-10-11 14:26:24,763 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 14:26:24,763 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 14:26:24,775 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2024-10-11 14:26:24,963 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,17 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 14:26:24,964 INFO L396 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-11 14:26:24,964 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 14:26:24,964 INFO L85 PathProgramCache]: Analyzing trace with hash 218597905, now seen corresponding path program 5 times [2024-10-11 14:26:24,964 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 14:26:24,964 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [112646477] [2024-10-11 14:26:24,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 14:26:24,964 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 14:26:24,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 14:26:25,152 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-10-11 14:26:25,152 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 14:26:25,152 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [112646477] [2024-10-11 14:26:25,156 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [112646477] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-11 14:26:25,156 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-11 14:26:25,156 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-10-11 14:26:25,156 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2039790052] [2024-10-11 14:26:25,156 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-11 14:26:25,157 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-10-11 14:26:25,157 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 14:26:25,157 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-10-11 14:26:25,157 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-10-11 14:26:25,157 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 28 [2024-10-11 14:26:25,157 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 149 places, 115 transitions, 1774 flow. Second operand has 10 states, 10 states have (on average 5.1) internal successors, (51), 10 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 14:26:25,157 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 14:26:25,157 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 28 [2024-10-11 14:26:25,157 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 14:26:25,463 INFO L124 PetriNetUnfolderBase]: 1230/2158 cut-off events. [2024-10-11 14:26:25,464 INFO L125 PetriNetUnfolderBase]: For 14831/14831 co-relation queries the response was YES. [2024-10-11 14:26:25,472 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10804 conditions, 2158 events. 1230/2158 cut-off events. For 14831/14831 co-relation queries the response was YES. Maximal size of possible extension queue 129. Compared 11997 event pairs, 654 based on Foata normal form. 5/2163 useless extension candidates. Maximal degree in co-relation 10736. Up to 1584 conditions per place. [2024-10-11 14:26:25,478 INFO L140 encePairwiseOnDemand]: 19/28 looper letters, 98 selfloop transitions, 40 changer transitions 8/147 dead transitions. [2024-10-11 14:26:25,478 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 157 places, 147 transitions, 2203 flow [2024-10-11 14:26:25,482 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-10-11 14:26:25,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-10-11 14:26:25,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 91 transitions. [2024-10-11 14:26:25,483 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.3611111111111111 [2024-10-11 14:26:25,483 INFO L175 Difference]: Start difference. First operand has 149 places, 115 transitions, 1774 flow. Second operand 9 states and 91 transitions. [2024-10-11 14:26:25,483 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 157 places, 147 transitions, 2203 flow [2024-10-11 14:26:25,511 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 147 places, 147 transitions, 2118 flow, removed 5 selfloop flow, removed 10 redundant places. [2024-10-11 14:26:25,513 INFO L231 Difference]: Finished difference. Result has 147 places, 112 transitions, 1720 flow [2024-10-11 14:26:25,513 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=1666, PETRI_DIFFERENCE_MINUEND_PLACES=139, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=114, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=74, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1720, PETRI_PLACES=147, PETRI_TRANSITIONS=112} [2024-10-11 14:26:25,513 INFO L277 CegarLoopForPetriNet]: 26 programPoint places, 121 predicate places. [2024-10-11 14:26:25,513 INFO L471 AbstractCegarLoop]: Abstraction has has 147 places, 112 transitions, 1720 flow [2024-10-11 14:26:25,513 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 5.1) internal successors, (51), 10 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 14:26:25,513 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 14:26:25,513 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 14:26:25,514 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2024-10-11 14:26:25,514 INFO L396 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-11 14:26:25,514 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 14:26:25,514 INFO L85 PathProgramCache]: Analyzing trace with hash -207171743, now seen corresponding path program 4 times [2024-10-11 14:26:25,514 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 14:26:25,514 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1986167844] [2024-10-11 14:26:25,514 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 14:26:25,514 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 14:26:25,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 14:26:25,752 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-10-11 14:26:25,752 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 14:26:25,753 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1986167844] [2024-10-11 14:26:25,753 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1986167844] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-11 14:26:25,753 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-11 14:26:25,753 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-10-11 14:26:25,753 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1273913639] [2024-10-11 14:26:25,753 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-11 14:26:25,753 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-10-11 14:26:25,754 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 14:26:25,754 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-10-11 14:26:25,754 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-10-11 14:26:25,754 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 28 [2024-10-11 14:26:25,754 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 147 places, 112 transitions, 1720 flow. Second operand has 10 states, 10 states have (on average 5.1) internal successors, (51), 10 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 14:26:25,755 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 14:26:25,755 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 28 [2024-10-11 14:26:25,755 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 14:26:26,049 INFO L124 PetriNetUnfolderBase]: 1180/2047 cut-off events. [2024-10-11 14:26:26,049 INFO L125 PetriNetUnfolderBase]: For 14853/14853 co-relation queries the response was YES. [2024-10-11 14:26:26,057 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10497 conditions, 2047 events. 1180/2047 cut-off events. For 14853/14853 co-relation queries the response was YES. Maximal size of possible extension queue 122. Compared 11064 event pairs, 605 based on Foata normal form. 4/2051 useless extension candidates. Maximal degree in co-relation 10430. Up to 1493 conditions per place. [2024-10-11 14:26:26,063 INFO L140 encePairwiseOnDemand]: 18/28 looper letters, 96 selfloop transitions, 40 changer transitions 3/140 dead transitions. [2024-10-11 14:26:26,063 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 153 places, 140 transitions, 2124 flow [2024-10-11 14:26:26,063 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-10-11 14:26:26,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-10-11 14:26:26,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 86 transitions. [2024-10-11 14:26:26,064 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.3412698412698413 [2024-10-11 14:26:26,064 INFO L175 Difference]: Start difference. First operand has 147 places, 112 transitions, 1720 flow. Second operand 9 states and 86 transitions. [2024-10-11 14:26:26,064 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 153 places, 140 transitions, 2124 flow [2024-10-11 14:26:26,090 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 143 places, 140 transitions, 2019 flow, removed 2 selfloop flow, removed 10 redundant places. [2024-10-11 14:26:26,092 INFO L231 Difference]: Finished difference. Result has 143 places, 110 transitions, 1651 flow [2024-10-11 14:26:26,093 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=1591, PETRI_DIFFERENCE_MINUEND_PLACES=135, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=111, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=71, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1651, PETRI_PLACES=143, PETRI_TRANSITIONS=110} [2024-10-11 14:26:26,093 INFO L277 CegarLoopForPetriNet]: 26 programPoint places, 117 predicate places. [2024-10-11 14:26:26,093 INFO L471 AbstractCegarLoop]: Abstraction has has 143 places, 110 transitions, 1651 flow [2024-10-11 14:26:26,093 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 5.1) internal successors, (51), 10 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 14:26:26,093 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 14:26:26,093 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 14:26:26,093 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2024-10-11 14:26:26,094 INFO L396 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-11 14:26:26,094 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 14:26:26,094 INFO L85 PathProgramCache]: Analyzing trace with hash -1115061845, now seen corresponding path program 6 times [2024-10-11 14:26:26,094 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 14:26:26,094 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [171129456] [2024-10-11 14:26:26,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 14:26:26,094 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 14:26:26,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 14:26:26,271 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-10-11 14:26:26,271 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 14:26:26,271 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [171129456] [2024-10-11 14:26:26,271 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [171129456] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-11 14:26:26,271 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-11 14:26:26,271 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-10-11 14:26:26,272 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1265277708] [2024-10-11 14:26:26,272 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-11 14:26:26,272 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-10-11 14:26:26,272 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 14:26:26,272 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-10-11 14:26:26,272 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-10-11 14:26:26,272 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 28 [2024-10-11 14:26:26,272 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 143 places, 110 transitions, 1651 flow. Second operand has 10 states, 10 states have (on average 5.1) internal successors, (51), 10 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 14:26:26,272 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 14:26:26,272 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 28 [2024-10-11 14:26:26,272 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 14:26:26,515 INFO L124 PetriNetUnfolderBase]: 1203/2080 cut-off events. [2024-10-11 14:26:26,515 INFO L125 PetriNetUnfolderBase]: For 17011/17011 co-relation queries the response was YES. [2024-10-11 14:26:26,522 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10786 conditions, 2080 events. 1203/2080 cut-off events. For 17011/17011 co-relation queries the response was YES. Maximal size of possible extension queue 125. Compared 11201 event pairs, 640 based on Foata normal form. 12/2092 useless extension candidates. Maximal degree in co-relation 10720. Up to 1507 conditions per place. [2024-10-11 14:26:26,527 INFO L140 encePairwiseOnDemand]: 18/28 looper letters, 97 selfloop transitions, 44 changer transitions 0/142 dead transitions. [2024-10-11 14:26:26,527 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 149 places, 142 transitions, 2154 flow [2024-10-11 14:26:26,527 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-10-11 14:26:26,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-10-11 14:26:26,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 96 transitions. [2024-10-11 14:26:26,528 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.38095238095238093 [2024-10-11 14:26:26,528 INFO L175 Difference]: Start difference. First operand has 143 places, 110 transitions, 1651 flow. Second operand 9 states and 96 transitions. [2024-10-11 14:26:26,528 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 149 places, 142 transitions, 2154 flow [2024-10-11 14:26:26,551 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 142 places, 142 transitions, 2066 flow, removed 0 selfloop flow, removed 7 redundant places. [2024-10-11 14:26:26,553 INFO L231 Difference]: Finished difference. Result has 145 places, 116 transitions, 1801 flow [2024-10-11 14:26:26,553 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=1571, PETRI_DIFFERENCE_MINUEND_PLACES=134, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=110, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=70, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1801, PETRI_PLACES=145, PETRI_TRANSITIONS=116} [2024-10-11 14:26:26,554 INFO L277 CegarLoopForPetriNet]: 26 programPoint places, 119 predicate places. [2024-10-11 14:26:26,554 INFO L471 AbstractCegarLoop]: Abstraction has has 145 places, 116 transitions, 1801 flow [2024-10-11 14:26:26,554 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 5.1) internal successors, (51), 10 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 14:26:26,554 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 14:26:26,554 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 14:26:26,554 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2024-10-11 14:26:26,554 INFO L396 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-11 14:26:26,554 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 14:26:26,554 INFO L85 PathProgramCache]: Analyzing trace with hash -102369313, now seen corresponding path program 7 times [2024-10-11 14:26:26,554 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 14:26:26,554 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [360879349] [2024-10-11 14:26:26,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 14:26:26,554 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 14:26:26,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 14:26:26,727 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-10-11 14:26:26,727 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 14:26:26,727 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [360879349] [2024-10-11 14:26:26,727 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [360879349] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-11 14:26:26,727 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-11 14:26:26,727 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-10-11 14:26:26,728 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [280122497] [2024-10-11 14:26:26,728 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-11 14:26:26,728 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-10-11 14:26:26,728 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 14:26:26,728 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-10-11 14:26:26,728 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-10-11 14:26:26,728 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 28 [2024-10-11 14:26:26,728 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 145 places, 116 transitions, 1801 flow. Second operand has 10 states, 10 states have (on average 5.1) internal successors, (51), 10 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 14:26:26,728 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 14:26:26,729 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 28 [2024-10-11 14:26:26,729 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 14:26:27,014 INFO L124 PetriNetUnfolderBase]: 1191/2068 cut-off events. [2024-10-11 14:26:27,015 INFO L125 PetriNetUnfolderBase]: For 16391/16391 co-relation queries the response was YES. [2024-10-11 14:26:27,022 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10634 conditions, 2068 events. 1191/2068 cut-off events. For 16391/16391 co-relation queries the response was YES. Maximal size of possible extension queue 125. Compared 11189 event pairs, 631 based on Foata normal form. 12/2080 useless extension candidates. Maximal degree in co-relation 10565. Up to 1507 conditions per place. [2024-10-11 14:26:27,027 INFO L140 encePairwiseOnDemand]: 18/28 looper letters, 97 selfloop transitions, 44 changer transitions 0/142 dead transitions. [2024-10-11 14:26:27,027 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 153 places, 142 transitions, 2194 flow [2024-10-11 14:26:27,027 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-10-11 14:26:27,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-10-11 14:26:27,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 96 transitions. [2024-10-11 14:26:27,028 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.38095238095238093 [2024-10-11 14:26:27,028 INFO L175 Difference]: Start difference. First operand has 145 places, 116 transitions, 1801 flow. Second operand 9 states and 96 transitions. [2024-10-11 14:26:27,028 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 153 places, 142 transitions, 2194 flow [2024-10-11 14:26:27,053 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 149 places, 142 transitions, 2141 flow, removed 5 selfloop flow, removed 4 redundant places. [2024-10-11 14:26:27,055 INFO L231 Difference]: Finished difference. Result has 151 places, 117 transitions, 1870 flow [2024-10-11 14:26:27,055 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=1749, PETRI_DIFFERENCE_MINUEND_PLACES=141, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=116, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=72, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1870, PETRI_PLACES=151, PETRI_TRANSITIONS=117} [2024-10-11 14:26:27,055 INFO L277 CegarLoopForPetriNet]: 26 programPoint places, 125 predicate places. [2024-10-11 14:26:27,055 INFO L471 AbstractCegarLoop]: Abstraction has has 151 places, 117 transitions, 1870 flow [2024-10-11 14:26:27,056 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 5.1) internal successors, (51), 10 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 14:26:27,056 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 14:26:27,056 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 14:26:27,056 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2024-10-11 14:26:27,056 INFO L396 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-11 14:26:27,056 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 14:26:27,056 INFO L85 PathProgramCache]: Analyzing trace with hash -543607039, now seen corresponding path program 8 times [2024-10-11 14:26:27,056 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 14:26:27,056 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [110298542] [2024-10-11 14:26:27,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 14:26:27,057 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 14:26:27,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 14:26:27,228 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-10-11 14:26:27,228 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 14:26:27,228 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [110298542] [2024-10-11 14:26:27,228 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [110298542] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-11 14:26:27,228 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-11 14:26:27,228 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-10-11 14:26:27,228 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [571528686] [2024-10-11 14:26:27,228 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-11 14:26:27,229 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-10-11 14:26:27,229 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 14:26:27,229 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-10-11 14:26:27,229 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-10-11 14:26:27,229 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 28 [2024-10-11 14:26:27,229 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 151 places, 117 transitions, 1870 flow. Second operand has 10 states, 10 states have (on average 5.1) internal successors, (51), 10 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 14:26:27,229 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 14:26:27,229 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 28 [2024-10-11 14:26:27,229 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 14:26:27,510 INFO L124 PetriNetUnfolderBase]: 1191/2073 cut-off events. [2024-10-11 14:26:27,510 INFO L125 PetriNetUnfolderBase]: For 16293/16293 co-relation queries the response was YES. [2024-10-11 14:26:27,517 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10692 conditions, 2073 events. 1191/2073 cut-off events. For 16293/16293 co-relation queries the response was YES. Maximal size of possible extension queue 126. Compared 11243 event pairs, 630 based on Foata normal form. 5/2078 useless extension candidates. Maximal degree in co-relation 10621. Up to 1507 conditions per place. [2024-10-11 14:26:27,522 INFO L140 encePairwiseOnDemand]: 18/28 looper letters, 91 selfloop transitions, 44 changer transitions 4/140 dead transitions. [2024-10-11 14:26:27,522 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 159 places, 140 transitions, 2220 flow [2024-10-11 14:26:27,522 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-10-11 14:26:27,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-10-11 14:26:27,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 92 transitions. [2024-10-11 14:26:27,523 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.36507936507936506 [2024-10-11 14:26:27,523 INFO L175 Difference]: Start difference. First operand has 151 places, 117 transitions, 1870 flow. Second operand 9 states and 92 transitions. [2024-10-11 14:26:27,523 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 159 places, 140 transitions, 2220 flow [2024-10-11 14:26:27,547 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 152 places, 140 transitions, 2115 flow, removed 3 selfloop flow, removed 7 redundant places. [2024-10-11 14:26:27,549 INFO L231 Difference]: Finished difference. Result has 152 places, 116 transitions, 1830 flow [2024-10-11 14:26:27,549 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=1765, PETRI_DIFFERENCE_MINUEND_PLACES=144, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=117, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1830, PETRI_PLACES=152, PETRI_TRANSITIONS=116} [2024-10-11 14:26:27,549 INFO L277 CegarLoopForPetriNet]: 26 programPoint places, 126 predicate places. [2024-10-11 14:26:27,549 INFO L471 AbstractCegarLoop]: Abstraction has has 152 places, 116 transitions, 1830 flow [2024-10-11 14:26:27,550 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 5.1) internal successors, (51), 10 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 14:26:27,550 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 14:26:27,550 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 14:26:27,550 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2024-10-11 14:26:27,550 INFO L396 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-11 14:26:27,550 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 14:26:27,550 INFO L85 PathProgramCache]: Analyzing trace with hash 469085493, now seen corresponding path program 9 times [2024-10-11 14:26:27,550 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 14:26:27,550 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1461372385] [2024-10-11 14:26:27,550 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 14:26:27,550 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 14:26:27,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 14:26:27,717 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-10-11 14:26:27,717 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 14:26:27,717 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1461372385] [2024-10-11 14:26:27,717 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1461372385] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-11 14:26:27,717 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-11 14:26:27,717 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-10-11 14:26:27,717 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1372378952] [2024-10-11 14:26:27,717 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-11 14:26:27,717 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-10-11 14:26:27,717 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 14:26:27,718 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-10-11 14:26:27,718 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-10-11 14:26:27,718 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 28 [2024-10-11 14:26:27,718 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 152 places, 116 transitions, 1830 flow. Second operand has 10 states, 10 states have (on average 5.1) internal successors, (51), 10 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 14:26:27,718 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 14:26:27,718 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 28 [2024-10-11 14:26:27,718 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 14:26:28,016 INFO L124 PetriNetUnfolderBase]: 1184/2061 cut-off events. [2024-10-11 14:26:28,016 INFO L125 PetriNetUnfolderBase]: For 15516/15516 co-relation queries the response was YES. [2024-10-11 14:26:28,023 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10546 conditions, 2061 events. 1184/2061 cut-off events. For 15516/15516 co-relation queries the response was YES. Maximal size of possible extension queue 125. Compared 11188 event pairs, 631 based on Foata normal form. 5/2066 useless extension candidates. Maximal degree in co-relation 10476. Up to 1507 conditions per place. [2024-10-11 14:26:28,027 INFO L140 encePairwiseOnDemand]: 18/28 looper letters, 91 selfloop transitions, 41 changer transitions 4/137 dead transitions. [2024-10-11 14:26:28,027 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 159 places, 137 transitions, 2149 flow [2024-10-11 14:26:28,027 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-10-11 14:26:28,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-10-11 14:26:28,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 92 transitions. [2024-10-11 14:26:28,028 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.36507936507936506 [2024-10-11 14:26:28,028 INFO L175 Difference]: Start difference. First operand has 152 places, 116 transitions, 1830 flow. Second operand 9 states and 92 transitions. [2024-10-11 14:26:28,028 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 159 places, 137 transitions, 2149 flow [2024-10-11 14:26:28,053 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 152 places, 137 transitions, 2063 flow, removed 0 selfloop flow, removed 7 redundant places. [2024-10-11 14:26:28,055 INFO L231 Difference]: Finished difference. Result has 152 places, 114 transitions, 1785 flow [2024-10-11 14:26:28,055 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=1722, PETRI_DIFFERENCE_MINUEND_PLACES=144, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=115, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=74, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1785, PETRI_PLACES=152, PETRI_TRANSITIONS=114} [2024-10-11 14:26:28,055 INFO L277 CegarLoopForPetriNet]: 26 programPoint places, 126 predicate places. [2024-10-11 14:26:28,055 INFO L471 AbstractCegarLoop]: Abstraction has has 152 places, 114 transitions, 1785 flow [2024-10-11 14:26:28,055 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 5.1) internal successors, (51), 10 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 14:26:28,055 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 14:26:28,055 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 14:26:28,055 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2024-10-11 14:26:28,055 INFO L396 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-11 14:26:28,056 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 14:26:28,056 INFO L85 PathProgramCache]: Analyzing trace with hash -600675833, now seen corresponding path program 5 times [2024-10-11 14:26:28,056 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 14:26:28,056 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1326085234] [2024-10-11 14:26:28,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 14:26:28,056 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 14:26:28,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 14:26:28,227 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-10-11 14:26:28,227 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 14:26:28,227 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1326085234] [2024-10-11 14:26:28,227 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1326085234] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-11 14:26:28,227 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [344698475] [2024-10-11 14:26:28,227 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-10-11 14:26:28,227 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 14:26:28,227 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 14:26:28,229 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-11 14:26:28,230 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2024-10-11 14:26:28,297 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-11 14:26:28,297 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-11 14:26:28,297 INFO L255 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 25 conjuncts are in the unsatisfiable core [2024-10-11 14:26:28,298 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 14:26:28,371 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-10-11 14:26:28,371 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-11 14:26:28,432 INFO L349 Elim1Store]: treesize reduction 28, result has 63.6 percent of original size [2024-10-11 14:26:28,432 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 40 treesize of output 56 [2024-10-11 14:26:28,452 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-10-11 14:26:28,452 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [344698475] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-11 14:26:28,453 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-11 14:26:28,453 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 7] total 21 [2024-10-11 14:26:28,453 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2034107927] [2024-10-11 14:26:28,453 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-11 14:26:28,453 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-10-11 14:26:28,453 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 14:26:28,453 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-10-11 14:26:28,454 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=332, Unknown=0, NotChecked=0, Total=420 [2024-10-11 14:26:28,454 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 28 [2024-10-11 14:26:28,454 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 152 places, 114 transitions, 1785 flow. Second operand has 21 states, 21 states have (on average 5.523809523809524) internal successors, (116), 21 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 14:26:28,454 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 14:26:28,454 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 28 [2024-10-11 14:26:28,454 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 14:26:28,945 INFO L124 PetriNetUnfolderBase]: 1266/2220 cut-off events. [2024-10-11 14:26:28,945 INFO L125 PetriNetUnfolderBase]: For 17318/17318 co-relation queries the response was YES. [2024-10-11 14:26:28,953 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11312 conditions, 2220 events. 1266/2220 cut-off events. For 17318/17318 co-relation queries the response was YES. Maximal size of possible extension queue 138. Compared 12370 event pairs, 598 based on Foata normal form. 21/2241 useless extension candidates. Maximal degree in co-relation 11242. Up to 1437 conditions per place. [2024-10-11 14:26:28,957 INFO L140 encePairwiseOnDemand]: 17/28 looper letters, 111 selfloop transitions, 43 changer transitions 0/155 dead transitions. [2024-10-11 14:26:28,957 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 159 places, 155 transitions, 2334 flow [2024-10-11 14:26:28,958 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-10-11 14:26:28,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-10-11 14:26:28,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 109 transitions. [2024-10-11 14:26:28,958 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.3892857142857143 [2024-10-11 14:26:28,958 INFO L175 Difference]: Start difference. First operand has 152 places, 114 transitions, 1785 flow. Second operand 10 states and 109 transitions. [2024-10-11 14:26:28,958 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 159 places, 155 transitions, 2334 flow [2024-10-11 14:26:28,986 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 151 places, 155 transitions, 2237 flow, removed 0 selfloop flow, removed 8 redundant places. [2024-10-11 14:26:28,988 INFO L231 Difference]: Finished difference. Result has 153 places, 117 transitions, 1842 flow [2024-10-11 14:26:28,988 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=1688, PETRI_DIFFERENCE_MINUEND_PLACES=142, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=114, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=72, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1842, PETRI_PLACES=153, PETRI_TRANSITIONS=117} [2024-10-11 14:26:28,988 INFO L277 CegarLoopForPetriNet]: 26 programPoint places, 127 predicate places. [2024-10-11 14:26:28,988 INFO L471 AbstractCegarLoop]: Abstraction has has 153 places, 117 transitions, 1842 flow [2024-10-11 14:26:28,988 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 5.523809523809524) internal successors, (116), 21 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 14:26:28,988 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 14:26:28,988 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 14:26:29,001 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2024-10-11 14:26:29,189 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36,18 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 14:26:29,189 INFO L396 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-11 14:26:29,189 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 14:26:29,189 INFO L85 PathProgramCache]: Analyzing trace with hash -68770085, now seen corresponding path program 10 times [2024-10-11 14:26:29,189 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 14:26:29,189 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1046782198] [2024-10-11 14:26:29,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 14:26:29,189 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 14:26:29,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 14:26:29,352 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-10-11 14:26:29,352 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 14:26:29,352 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1046782198] [2024-10-11 14:26:29,352 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1046782198] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-11 14:26:29,352 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-11 14:26:29,352 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-10-11 14:26:29,352 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1115662495] [2024-10-11 14:26:29,352 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-11 14:26:29,353 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-10-11 14:26:29,353 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 14:26:29,353 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-10-11 14:26:29,353 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-10-11 14:26:29,353 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 28 [2024-10-11 14:26:29,353 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 153 places, 117 transitions, 1842 flow. Second operand has 10 states, 10 states have (on average 5.1) internal successors, (51), 10 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 14:26:29,353 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 14:26:29,353 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 28 [2024-10-11 14:26:29,353 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 14:26:29,631 INFO L124 PetriNetUnfolderBase]: 1231/2149 cut-off events. [2024-10-11 14:26:29,631 INFO L125 PetriNetUnfolderBase]: For 17694/17694 co-relation queries the response was YES. [2024-10-11 14:26:29,638 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11243 conditions, 2149 events. 1231/2149 cut-off events. For 17694/17694 co-relation queries the response was YES. Maximal size of possible extension queue 130. Compared 11786 event pairs, 682 based on Foata normal form. 5/2154 useless extension candidates. Maximal degree in co-relation 11170. Up to 1670 conditions per place. [2024-10-11 14:26:29,642 INFO L140 encePairwiseOnDemand]: 19/28 looper letters, 92 selfloop transitions, 37 changer transitions 8/138 dead transitions. [2024-10-11 14:26:29,643 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 161 places, 138 transitions, 2164 flow [2024-10-11 14:26:29,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-10-11 14:26:29,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-10-11 14:26:29,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 89 transitions. [2024-10-11 14:26:29,643 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.3531746031746032 [2024-10-11 14:26:29,643 INFO L175 Difference]: Start difference. First operand has 153 places, 117 transitions, 1842 flow. Second operand 9 states and 89 transitions. [2024-10-11 14:26:29,643 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 161 places, 138 transitions, 2164 flow [2024-10-11 14:26:29,670 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 155 places, 138 transitions, 2091 flow, removed 11 selfloop flow, removed 6 redundant places. [2024-10-11 14:26:29,672 INFO L231 Difference]: Finished difference. Result has 155 places, 114 transitions, 1788 flow [2024-10-11 14:26:29,672 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=1748, PETRI_DIFFERENCE_MINUEND_PLACES=147, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=116, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=79, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1788, PETRI_PLACES=155, PETRI_TRANSITIONS=114} [2024-10-11 14:26:29,673 INFO L277 CegarLoopForPetriNet]: 26 programPoint places, 129 predicate places. [2024-10-11 14:26:29,673 INFO L471 AbstractCegarLoop]: Abstraction has has 155 places, 114 transitions, 1788 flow [2024-10-11 14:26:29,673 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 5.1) internal successors, (51), 10 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 14:26:29,673 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 14:26:29,673 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 14:26:29,673 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2024-10-11 14:26:29,673 INFO L396 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-11 14:26:29,673 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 14:26:29,673 INFO L85 PathProgramCache]: Analyzing trace with hash -1383104487, now seen corresponding path program 6 times [2024-10-11 14:26:29,673 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 14:26:29,673 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1930761155] [2024-10-11 14:26:29,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 14:26:29,674 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 14:26:29,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 14:26:29,836 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-10-11 14:26:29,836 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 14:26:29,836 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1930761155] [2024-10-11 14:26:29,836 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1930761155] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-11 14:26:29,836 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2040480154] [2024-10-11 14:26:29,836 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-10-11 14:26:29,836 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 14:26:29,836 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 14:26:29,837 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-11 14:26:29,838 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2024-10-11 14:26:29,904 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2024-10-11 14:26:29,904 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-11 14:26:29,905 INFO L255 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 25 conjuncts are in the unsatisfiable core [2024-10-11 14:26:29,906 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 14:26:29,943 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-11 14:26:29,943 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 29 treesize of output 21 [2024-10-11 14:26:29,957 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-10-11 14:26:29,958 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-11 14:26:30,007 INFO L349 Elim1Store]: treesize reduction 28, result has 63.6 percent of original size [2024-10-11 14:26:30,008 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 40 treesize of output 56 [2024-10-11 14:26:30,030 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-10-11 14:26:30,030 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2040480154] provided 1 perfect and 1 imperfect interpolant sequences [2024-10-11 14:26:30,030 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-10-11 14:26:30,030 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [9, 9] total 17 [2024-10-11 14:26:30,030 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1335007141] [2024-10-11 14:26:30,031 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-11 14:26:30,031 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-10-11 14:26:30,031 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 14:26:30,031 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-10-11 14:26:30,031 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2024-10-11 14:26:30,031 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 28 [2024-10-11 14:26:30,032 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 155 places, 114 transitions, 1788 flow. Second operand has 7 states, 7 states have (on average 6.0) internal successors, (42), 7 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 14:26:30,032 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 14:26:30,032 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 28 [2024-10-11 14:26:30,032 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 14:26:30,394 INFO L124 PetriNetUnfolderBase]: 1297/2281 cut-off events. [2024-10-11 14:26:30,395 INFO L125 PetriNetUnfolderBase]: For 18432/18432 co-relation queries the response was YES. [2024-10-11 14:26:30,404 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11718 conditions, 2281 events. 1297/2281 cut-off events. For 18432/18432 co-relation queries the response was YES. Maximal size of possible extension queue 141. Compared 12844 event pairs, 660 based on Foata normal form. 21/2302 useless extension candidates. Maximal degree in co-relation 11646. Up to 1692 conditions per place. [2024-10-11 14:26:30,409 INFO L140 encePairwiseOnDemand]: 21/28 looper letters, 104 selfloop transitions, 39 changer transitions 0/144 dead transitions. [2024-10-11 14:26:30,409 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 157 places, 144 transitions, 2233 flow [2024-10-11 14:26:30,409 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-10-11 14:26:30,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-10-11 14:26:30,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 88 transitions. [2024-10-11 14:26:30,410 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4489795918367347 [2024-10-11 14:26:30,410 INFO L175 Difference]: Start difference. First operand has 155 places, 114 transitions, 1788 flow. Second operand 7 states and 88 transitions. [2024-10-11 14:26:30,410 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 157 places, 144 transitions, 2233 flow [2024-10-11 14:26:30,438 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 148 places, 144 transitions, 2149 flow, removed 3 selfloop flow, removed 9 redundant places. [2024-10-11 14:26:30,439 INFO L231 Difference]: Finished difference. Result has 149 places, 116 transitions, 1837 flow [2024-10-11 14:26:30,439 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=1706, PETRI_DIFFERENCE_MINUEND_PLACES=142, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=114, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=76, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1837, PETRI_PLACES=149, PETRI_TRANSITIONS=116} [2024-10-11 14:26:30,440 INFO L277 CegarLoopForPetriNet]: 26 programPoint places, 123 predicate places. [2024-10-11 14:26:30,440 INFO L471 AbstractCegarLoop]: Abstraction has has 149 places, 116 transitions, 1837 flow [2024-10-11 14:26:30,440 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 6.0) internal successors, (42), 7 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 14:26:30,440 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 14:26:30,440 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 14:26:30,452 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2024-10-11 14:26:30,641 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2024-10-11 14:26:30,641 INFO L396 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-11 14:26:30,641 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 14:26:30,641 INFO L85 PathProgramCache]: Analyzing trace with hash -54407067, now seen corresponding path program 7 times [2024-10-11 14:26:30,641 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 14:26:30,641 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1298466831] [2024-10-11 14:26:30,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 14:26:30,641 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 14:26:30,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 14:26:30,814 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-10-11 14:26:30,814 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 14:26:30,814 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1298466831] [2024-10-11 14:26:30,814 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1298466831] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-11 14:26:30,815 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1473102410] [2024-10-11 14:26:30,815 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-10-11 14:26:30,815 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 14:26:30,815 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 14:26:30,816 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-11 14:26:30,817 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2024-10-11 14:26:30,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 14:26:30,889 INFO L255 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 15 conjuncts are in the unsatisfiable core [2024-10-11 14:26:30,889 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 14:26:30,921 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-11 14:26:30,921 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 29 treesize of output 25 [2024-10-11 14:26:30,938 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-10-11 14:26:30,938 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-11 14:26:30,987 INFO L349 Elim1Store]: treesize reduction 28, result has 63.6 percent of original size [2024-10-11 14:26:30,988 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 40 treesize of output 56 [2024-10-11 14:26:31,002 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-10-11 14:26:31,002 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1473102410] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-11 14:26:31,002 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-11 14:26:31,002 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 7] total 18 [2024-10-11 14:26:31,002 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [862093963] [2024-10-11 14:26:31,002 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-11 14:26:31,002 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-10-11 14:26:31,002 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 14:26:31,003 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-10-11 14:26:31,003 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=241, Unknown=0, NotChecked=0, Total=306 [2024-10-11 14:26:31,003 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 28 [2024-10-11 14:26:31,003 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 149 places, 116 transitions, 1837 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) [2024-10-11 14:26:31,003 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 14:26:31,003 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 28 [2024-10-11 14:26:31,003 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 14:26:31,422 INFO L124 PetriNetUnfolderBase]: 1276/2260 cut-off events. [2024-10-11 14:26:31,422 INFO L125 PetriNetUnfolderBase]: For 16973/16973 co-relation queries the response was YES. [2024-10-11 14:26:31,430 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11416 conditions, 2260 events. 1276/2260 cut-off events. For 16973/16973 co-relation queries the response was YES. Maximal size of possible extension queue 142. Compared 12828 event pairs, 612 based on Foata normal form. 21/2280 useless extension candidates. Maximal degree in co-relation 11347. Up to 1600 conditions per place. [2024-10-11 14:26:31,434 INFO L140 encePairwiseOnDemand]: 18/28 looper letters, 120 selfloop transitions, 49 changer transitions 0/170 dead transitions. [2024-10-11 14:26:31,434 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 162 places, 170 transitions, 2425 flow [2024-10-11 14:26:31,435 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-10-11 14:26:31,435 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2024-10-11 14:26:31,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 141 transitions. [2024-10-11 14:26:31,435 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.3596938775510204 [2024-10-11 14:26:31,435 INFO L175 Difference]: Start difference. First operand has 149 places, 116 transitions, 1837 flow. Second operand 14 states and 141 transitions. [2024-10-11 14:26:31,435 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 162 places, 170 transitions, 2425 flow [2024-10-11 14:26:31,462 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 158 places, 170 transitions, 2323 flow, removed 12 selfloop flow, removed 4 redundant places. [2024-10-11 14:26:31,464 INFO L231 Difference]: Finished difference. Result has 162 places, 123 transitions, 1953 flow [2024-10-11 14:26:31,464 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=1748, PETRI_DIFFERENCE_MINUEND_PLACES=145, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=116, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=70, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=1953, PETRI_PLACES=162, PETRI_TRANSITIONS=123} [2024-10-11 14:26:31,465 INFO L277 CegarLoopForPetriNet]: 26 programPoint places, 136 predicate places. [2024-10-11 14:26:31,465 INFO L471 AbstractCegarLoop]: Abstraction has has 162 places, 123 transitions, 1953 flow [2024-10-11 14:26:31,465 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) [2024-10-11 14:26:31,465 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 14:26:31,465 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 14:26:31,476 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2024-10-11 14:26:31,665 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2024-10-11 14:26:31,666 INFO L396 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-11 14:26:31,666 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 14:26:31,666 INFO L85 PathProgramCache]: Analyzing trace with hash -1265101949, now seen corresponding path program 8 times [2024-10-11 14:26:31,666 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 14:26:31,666 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [850674187] [2024-10-11 14:26:31,666 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 14:26:31,666 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 14:26:31,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 14:26:31,844 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-10-11 14:26:31,844 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 14:26:31,844 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [850674187] [2024-10-11 14:26:31,844 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [850674187] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-11 14:26:31,844 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-11 14:26:31,844 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-10-11 14:26:31,844 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [292854415] [2024-10-11 14:26:31,845 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-11 14:26:31,845 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-10-11 14:26:31,846 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 14:26:31,847 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-10-11 14:26:31,848 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-10-11 14:26:31,848 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 28 [2024-10-11 14:26:31,848 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 162 places, 123 transitions, 1953 flow. Second operand has 10 states, 10 states have (on average 5.1) internal successors, (51), 10 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 14:26:31,848 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 14:26:31,848 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 28 [2024-10-11 14:26:31,848 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 14:26:32,175 INFO L124 PetriNetUnfolderBase]: 1272/2256 cut-off events. [2024-10-11 14:26:32,176 INFO L125 PetriNetUnfolderBase]: For 15658/15658 co-relation queries the response was YES. [2024-10-11 14:26:32,184 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11420 conditions, 2256 events. 1272/2256 cut-off events. For 15658/15658 co-relation queries the response was YES. Maximal size of possible extension queue 141. Compared 12883 event pairs, 694 based on Foata normal form. 4/2260 useless extension candidates. Maximal degree in co-relation 11345. Up to 1787 conditions per place. [2024-10-11 14:26:32,188 INFO L140 encePairwiseOnDemand]: 19/28 looper letters, 96 selfloop transitions, 40 changer transitions 3/140 dead transitions. [2024-10-11 14:26:32,188 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 170 places, 140 transitions, 2259 flow [2024-10-11 14:26:32,189 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-10-11 14:26:32,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-10-11 14:26:32,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 84 transitions. [2024-10-11 14:26:32,189 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.3333333333333333 [2024-10-11 14:26:32,189 INFO L175 Difference]: Start difference. First operand has 162 places, 123 transitions, 1953 flow. Second operand 9 states and 84 transitions. [2024-10-11 14:26:32,189 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 170 places, 140 transitions, 2259 flow [2024-10-11 14:26:32,215 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 161 places, 140 transitions, 2194 flow, removed 2 selfloop flow, removed 9 redundant places. [2024-10-11 14:26:32,216 INFO L231 Difference]: Finished difference. Result has 161 places, 121 transitions, 1921 flow [2024-10-11 14:26:32,217 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=1857, PETRI_DIFFERENCE_MINUEND_PLACES=153, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=122, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=82, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1921, PETRI_PLACES=161, PETRI_TRANSITIONS=121} [2024-10-11 14:26:32,217 INFO L277 CegarLoopForPetriNet]: 26 programPoint places, 135 predicate places. [2024-10-11 14:26:32,217 INFO L471 AbstractCegarLoop]: Abstraction has has 161 places, 121 transitions, 1921 flow [2024-10-11 14:26:32,217 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 5.1) internal successors, (51), 10 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 14:26:32,217 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 14:26:32,217 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 14:26:32,218 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2024-10-11 14:26:32,218 INFO L396 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-11 14:26:32,218 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 14:26:32,218 INFO L85 PathProgramCache]: Analyzing trace with hash 1975366923, now seen corresponding path program 9 times [2024-10-11 14:26:32,218 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 14:26:32,218 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1920625873] [2024-10-11 14:26:32,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 14:26:32,219 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 14:26:32,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 14:26:32,384 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-10-11 14:26:32,384 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 14:26:32,385 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1920625873] [2024-10-11 14:26:32,385 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1920625873] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-11 14:26:32,385 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-11 14:26:32,385 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-10-11 14:26:32,386 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1485131454] [2024-10-11 14:26:32,386 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-11 14:26:32,386 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-10-11 14:26:32,386 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 14:26:32,386 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-10-11 14:26:32,386 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-10-11 14:26:32,386 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 28 [2024-10-11 14:26:32,387 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 161 places, 121 transitions, 1921 flow. Second operand has 10 states, 10 states have (on average 5.1) internal successors, (51), 10 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 14:26:32,387 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 14:26:32,387 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 28 [2024-10-11 14:26:32,387 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 14:26:32,701 INFO L124 PetriNetUnfolderBase]: 1227/2156 cut-off events. [2024-10-11 14:26:32,701 INFO L125 PetriNetUnfolderBase]: For 15365/15365 co-relation queries the response was YES. [2024-10-11 14:26:32,711 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11149 conditions, 2156 events. 1227/2156 cut-off events. For 15365/15365 co-relation queries the response was YES. Maximal size of possible extension queue 132. Compared 12024 event pairs, 655 based on Foata normal form. 4/2160 useless extension candidates. Maximal degree in co-relation 11075. Up to 1696 conditions per place. [2024-10-11 14:26:32,717 INFO L140 encePairwiseOnDemand]: 19/28 looper letters, 98 selfloop transitions, 37 changer transitions 3/139 dead transitions. [2024-10-11 14:26:32,717 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 168 places, 139 transitions, 2229 flow [2024-10-11 14:26:32,718 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-10-11 14:26:32,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-10-11 14:26:32,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 86 transitions. [2024-10-11 14:26:32,719 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.3412698412698413 [2024-10-11 14:26:32,719 INFO L175 Difference]: Start difference. First operand has 161 places, 121 transitions, 1921 flow. Second operand 9 states and 86 transitions. [2024-10-11 14:26:32,719 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 168 places, 139 transitions, 2229 flow [2024-10-11 14:26:32,746 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 160 places, 139 transitions, 2134 flow, removed 0 selfloop flow, removed 8 redundant places. [2024-10-11 14:26:32,748 INFO L231 Difference]: Finished difference. Result has 160 places, 119 transitions, 1852 flow [2024-10-11 14:26:32,749 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=1797, PETRI_DIFFERENCE_MINUEND_PLACES=152, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=120, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=83, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1852, PETRI_PLACES=160, PETRI_TRANSITIONS=119} [2024-10-11 14:26:32,749 INFO L277 CegarLoopForPetriNet]: 26 programPoint places, 134 predicate places. [2024-10-11 14:26:32,749 INFO L471 AbstractCegarLoop]: Abstraction has has 160 places, 119 transitions, 1852 flow [2024-10-11 14:26:32,749 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 5.1) internal successors, (51), 10 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 14:26:32,749 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 14:26:32,749 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 14:26:32,749 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2024-10-11 14:26:32,750 INFO L396 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-11 14:26:32,750 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 14:26:32,750 INFO L85 PathProgramCache]: Analyzing trace with hash -872369295, now seen corresponding path program 10 times [2024-10-11 14:26:32,750 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 14:26:32,750 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2097945647] [2024-10-11 14:26:32,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 14:26:32,750 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 14:26:32,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 14:26:32,913 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-10-11 14:26:32,914 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 14:26:32,914 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2097945647] [2024-10-11 14:26:32,914 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2097945647] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-11 14:26:32,914 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-11 14:26:32,914 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-10-11 14:26:32,914 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2063889548] [2024-10-11 14:26:32,914 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-11 14:26:32,914 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-10-11 14:26:32,914 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 14:26:32,914 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-10-11 14:26:32,914 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-10-11 14:26:32,915 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 28 [2024-10-11 14:26:32,915 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 160 places, 119 transitions, 1852 flow. Second operand has 10 states, 10 states have (on average 5.1) internal successors, (51), 10 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 14:26:32,915 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 14:26:32,915 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 28 [2024-10-11 14:26:32,915 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 14:26:33,173 INFO L124 PetriNetUnfolderBase]: 1182/2056 cut-off events. [2024-10-11 14:26:33,173 INFO L125 PetriNetUnfolderBase]: For 15058/15058 co-relation queries the response was YES. [2024-10-11 14:26:33,181 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10779 conditions, 2056 events. 1182/2056 cut-off events. For 15058/15058 co-relation queries the response was YES. Maximal size of possible extension queue 126. Compared 11169 event pairs, 618 based on Foata normal form. 4/2060 useless extension candidates. Maximal degree in co-relation 10705. Up to 1605 conditions per place. [2024-10-11 14:26:33,186 INFO L140 encePairwiseOnDemand]: 19/28 looper letters, 94 selfloop transitions, 35 changer transitions 6/136 dead transitions. [2024-10-11 14:26:33,186 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 166 places, 136 transitions, 2151 flow [2024-10-11 14:26:33,187 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-10-11 14:26:33,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-10-11 14:26:33,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 82 transitions. [2024-10-11 14:26:33,187 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.3253968253968254 [2024-10-11 14:26:33,187 INFO L175 Difference]: Start difference. First operand has 160 places, 119 transitions, 1852 flow. Second operand 9 states and 82 transitions. [2024-10-11 14:26:33,187 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 166 places, 136 transitions, 2151 flow [2024-10-11 14:26:33,213 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 159 places, 136 transitions, 2079 flow, removed 0 selfloop flow, removed 7 redundant places. [2024-10-11 14:26:33,215 INFO L231 Difference]: Finished difference. Result has 159 places, 116 transitions, 1785 flow [2024-10-11 14:26:33,215 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=1750, PETRI_DIFFERENCE_MINUEND_PLACES=151, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=118, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=83, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1785, PETRI_PLACES=159, PETRI_TRANSITIONS=116} [2024-10-11 14:26:33,216 INFO L277 CegarLoopForPetriNet]: 26 programPoint places, 133 predicate places. [2024-10-11 14:26:33,216 INFO L471 AbstractCegarLoop]: Abstraction has has 159 places, 116 transitions, 1785 flow [2024-10-11 14:26:33,216 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 5.1) internal successors, (51), 10 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 14:26:33,216 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 14:26:33,216 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 14:26:33,216 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2024-10-11 14:26:33,216 INFO L396 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-11 14:26:33,216 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 14:26:33,216 INFO L85 PathProgramCache]: Analyzing trace with hash -497280661, now seen corresponding path program 11 times [2024-10-11 14:26:33,217 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 14:26:33,217 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [643551912] [2024-10-11 14:26:33,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 14:26:33,217 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 14:26:33,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 14:26:33,386 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-10-11 14:26:33,386 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 14:26:33,386 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [643551912] [2024-10-11 14:26:33,387 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [643551912] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-11 14:26:33,387 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1613712661] [2024-10-11 14:26:33,387 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-10-11 14:26:33,387 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 14:26:33,387 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 14:26:33,388 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-11 14:26:33,389 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2024-10-11 14:26:33,459 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-11 14:26:33,459 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-11 14:26:33,460 INFO L255 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 21 conjuncts are in the unsatisfiable core [2024-10-11 14:26:33,461 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 14:26:33,522 INFO L349 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2024-10-11 14:26:33,522 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 26 treesize of output 10 [2024-10-11 14:26:33,529 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-10-11 14:26:33,529 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-11 14:26:33,581 INFO L349 Elim1Store]: treesize reduction 28, result has 59.4 percent of original size [2024-10-11 14:26:33,581 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 32 treesize of output 48 [2024-10-11 14:26:33,595 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-10-11 14:26:33,595 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1613712661] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-11 14:26:33,595 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-11 14:26:33,595 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 7] total 20 [2024-10-11 14:26:33,596 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1596218702] [2024-10-11 14:26:33,596 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-11 14:26:33,596 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-10-11 14:26:33,596 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 14:26:33,596 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-10-11 14:26:33,596 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=300, Unknown=0, NotChecked=0, Total=380 [2024-10-11 14:26:33,596 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 28 [2024-10-11 14:26:33,597 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 159 places, 116 transitions, 1785 flow. Second operand has 20 states, 20 states have (on average 5.6) internal successors, (112), 20 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 14:26:33,597 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 14:26:33,597 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 28 [2024-10-11 14:26:33,597 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 14:26:34,063 INFO L124 PetriNetUnfolderBase]: 1212/2102 cut-off events. [2024-10-11 14:26:34,063 INFO L125 PetriNetUnfolderBase]: For 15385/15385 co-relation queries the response was YES. [2024-10-11 14:26:34,072 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11107 conditions, 2102 events. 1212/2102 cut-off events. For 15385/15385 co-relation queries the response was YES. Maximal size of possible extension queue 130. Compared 11648 event pairs, 91 based on Foata normal form. 12/2114 useless extension candidates. Maximal degree in co-relation 11033. Up to 1203 conditions per place. [2024-10-11 14:26:34,077 INFO L140 encePairwiseOnDemand]: 17/28 looper letters, 113 selfloop transitions, 50 changer transitions 1/165 dead transitions. [2024-10-11 14:26:34,077 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 164 places, 165 transitions, 2491 flow [2024-10-11 14:26:34,077 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-10-11 14:26:34,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-10-11 14:26:34,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 100 transitions. [2024-10-11 14:26:34,078 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.35714285714285715 [2024-10-11 14:26:34,078 INFO L175 Difference]: Start difference. First operand has 159 places, 116 transitions, 1785 flow. Second operand 10 states and 100 transitions. [2024-10-11 14:26:34,078 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 164 places, 165 transitions, 2491 flow [2024-10-11 14:26:34,107 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 156 places, 165 transitions, 2408 flow, removed 1 selfloop flow, removed 8 redundant places. [2024-10-11 14:26:34,109 INFO L231 Difference]: Finished difference. Result has 158 places, 118 transitions, 1858 flow [2024-10-11 14:26:34,109 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=1706, PETRI_DIFFERENCE_MINUEND_PLACES=147, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=116, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=66, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1858, PETRI_PLACES=158, PETRI_TRANSITIONS=118} [2024-10-11 14:26:34,110 INFO L277 CegarLoopForPetriNet]: 26 programPoint places, 132 predicate places. [2024-10-11 14:26:34,110 INFO L471 AbstractCegarLoop]: Abstraction has has 158 places, 118 transitions, 1858 flow [2024-10-11 14:26:34,110 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 5.6) internal successors, (112), 20 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 14:26:34,110 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 14:26:34,110 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 14:26:34,123 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2024-10-11 14:26:34,310 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,21 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 14:26:34,311 INFO L396 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-11 14:26:34,311 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 14:26:34,311 INFO L85 PathProgramCache]: Analyzing trace with hash 188378157, now seen corresponding path program 11 times [2024-10-11 14:26:34,311 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 14:26:34,311 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2063383917] [2024-10-11 14:26:34,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 14:26:34,311 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 14:26:34,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 14:26:34,458 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-10-11 14:26:34,458 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 14:26:34,458 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2063383917] [2024-10-11 14:26:34,458 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2063383917] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-11 14:26:34,458 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-11 14:26:34,458 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-10-11 14:26:34,459 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1171081990] [2024-10-11 14:26:34,459 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-11 14:26:34,459 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-10-11 14:26:34,459 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 14:26:34,459 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-10-11 14:26:34,459 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2024-10-11 14:26:34,459 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 28 [2024-10-11 14:26:34,459 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 158 places, 118 transitions, 1858 flow. Second operand has 10 states, 10 states have (on average 5.1) internal successors, (51), 10 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 14:26:34,459 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 14:26:34,459 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 28 [2024-10-11 14:26:34,460 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 14:26:34,735 INFO L124 PetriNetUnfolderBase]: 1242/2153 cut-off events. [2024-10-11 14:26:34,735 INFO L125 PetriNetUnfolderBase]: For 18247/18247 co-relation queries the response was YES. [2024-10-11 14:26:34,743 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11789 conditions, 2153 events. 1242/2153 cut-off events. For 18247/18247 co-relation queries the response was YES. Maximal size of possible extension queue 135. Compared 11712 event pairs, 510 based on Foata normal form. 21/2174 useless extension candidates. Maximal degree in co-relation 11714. Up to 1388 conditions per place. [2024-10-11 14:26:34,748 INFO L140 encePairwiseOnDemand]: 18/28 looper letters, 111 selfloop transitions, 47 changer transitions 0/159 dead transitions. [2024-10-11 14:26:34,748 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 166 places, 159 transitions, 2480 flow [2024-10-11 14:26:34,749 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-10-11 14:26:34,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-10-11 14:26:34,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 100 transitions. [2024-10-11 14:26:34,749 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.3968253968253968 [2024-10-11 14:26:34,749 INFO L175 Difference]: Start difference. First operand has 158 places, 118 transitions, 1858 flow. Second operand 9 states and 100 transitions. [2024-10-11 14:26:34,749 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 166 places, 159 transitions, 2480 flow [2024-10-11 14:26:34,778 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 159 places, 159 transitions, 2348 flow, removed 8 selfloop flow, removed 7 redundant places. [2024-10-11 14:26:34,780 INFO L231 Difference]: Finished difference. Result has 161 places, 121 transitions, 1911 flow [2024-10-11 14:26:34,780 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=1740, PETRI_DIFFERENCE_MINUEND_PLACES=151, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=118, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1911, PETRI_PLACES=161, PETRI_TRANSITIONS=121} [2024-10-11 14:26:34,780 INFO L277 CegarLoopForPetriNet]: 26 programPoint places, 135 predicate places. [2024-10-11 14:26:34,781 INFO L471 AbstractCegarLoop]: Abstraction has has 161 places, 121 transitions, 1911 flow [2024-10-11 14:26:34,781 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 5.1) internal successors, (51), 10 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 14:26:34,781 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 14:26:34,781 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 14:26:34,781 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2024-10-11 14:26:34,781 INFO L396 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-11 14:26:34,781 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 14:26:34,781 INFO L85 PathProgramCache]: Analyzing trace with hash 303513221, now seen corresponding path program 12 times [2024-10-11 14:26:34,781 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 14:26:34,781 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [804784459] [2024-10-11 14:26:34,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 14:26:34,782 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 14:26:34,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 14:26:34,958 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-10-11 14:26:34,958 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 14:26:34,958 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [804784459] [2024-10-11 14:26:34,958 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [804784459] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-11 14:26:34,958 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [60938507] [2024-10-11 14:26:34,958 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-10-11 14:26:34,959 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 14:26:34,959 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 14:26:34,960 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-11 14:26:34,961 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2024-10-11 14:26:35,032 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2024-10-11 14:26:35,032 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-11 14:26:35,033 INFO L255 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 25 conjuncts are in the unsatisfiable core [2024-10-11 14:26:35,034 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 14:26:35,081 INFO L349 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2024-10-11 14:26:35,082 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 26 treesize of output 10 [2024-10-11 14:26:35,088 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-10-11 14:26:35,088 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-11 14:26:35,161 INFO L349 Elim1Store]: treesize reduction 28, result has 59.4 percent of original size [2024-10-11 14:26:35,161 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 32 treesize of output 48 [2024-10-11 14:26:35,178 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-10-11 14:26:35,178 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [60938507] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-11 14:26:35,178 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-11 14:26:35,179 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 7] total 17 [2024-10-11 14:26:35,179 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1289537062] [2024-10-11 14:26:35,179 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-11 14:26:35,179 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-10-11 14:26:35,179 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 14:26:35,179 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-10-11 14:26:35,180 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=212, Unknown=0, NotChecked=0, Total=272 [2024-10-11 14:26:35,180 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 28 [2024-10-11 14:26:35,180 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 161 places, 121 transitions, 1911 flow. Second operand has 17 states, 17 states have (on average 5.470588235294118) internal successors, (93), 17 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 14:26:35,180 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 14:26:35,180 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 28 [2024-10-11 14:26:35,181 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 14:26:35,654 INFO L124 PetriNetUnfolderBase]: 1764/3067 cut-off events. [2024-10-11 14:26:35,654 INFO L125 PetriNetUnfolderBase]: For 21832/21832 co-relation queries the response was YES. [2024-10-11 14:26:35,667 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15511 conditions, 3067 events. 1764/3067 cut-off events. For 21832/21832 co-relation queries the response was YES. Maximal size of possible extension queue 178. Compared 18018 event pairs, 541 based on Foata normal form. 12/3079 useless extension candidates. Maximal degree in co-relation 15436. Up to 1289 conditions per place. [2024-10-11 14:26:35,674 INFO L140 encePairwiseOnDemand]: 17/28 looper letters, 145 selfloop transitions, 60 changer transitions 0/206 dead transitions. [2024-10-11 14:26:35,674 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 172 places, 206 transitions, 3074 flow [2024-10-11 14:26:35,674 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-10-11 14:26:35,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-10-11 14:26:35,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 133 transitions. [2024-10-11 14:26:35,674 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.3958333333333333 [2024-10-11 14:26:35,675 INFO L175 Difference]: Start difference. First operand has 161 places, 121 transitions, 1911 flow. Second operand 12 states and 133 transitions. [2024-10-11 14:26:35,675 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 172 places, 206 transitions, 3074 flow [2024-10-11 14:26:35,722 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 166 places, 206 transitions, 2946 flow, removed 14 selfloop flow, removed 6 redundant places. [2024-10-11 14:26:35,724 INFO L231 Difference]: Finished difference. Result has 170 places, 130 transitions, 2114 flow [2024-10-11 14:26:35,724 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=1791, PETRI_DIFFERENCE_MINUEND_PLACES=155, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=121, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=2114, PETRI_PLACES=170, PETRI_TRANSITIONS=130} [2024-10-11 14:26:35,724 INFO L277 CegarLoopForPetriNet]: 26 programPoint places, 144 predicate places. [2024-10-11 14:26:35,724 INFO L471 AbstractCegarLoop]: Abstraction has has 170 places, 130 transitions, 2114 flow [2024-10-11 14:26:35,724 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 5.470588235294118) internal successors, (93), 17 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 14:26:35,725 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 14:26:35,725 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 14:26:35,736 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2024-10-11 14:26:35,925 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2024-10-11 14:26:35,925 INFO L396 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-11 14:26:35,925 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 14:26:35,925 INFO L85 PathProgramCache]: Analyzing trace with hash 1092287649, now seen corresponding path program 12 times [2024-10-11 14:26:35,926 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 14:26:35,926 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1352433142] [2024-10-11 14:26:35,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 14:26:35,926 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 14:26:35,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 14:26:36,097 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-10-11 14:26:36,097 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 14:26:36,098 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1352433142] [2024-10-11 14:26:36,098 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1352433142] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-11 14:26:36,098 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-11 14:26:36,098 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-10-11 14:26:36,098 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [774778915] [2024-10-11 14:26:36,098 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-11 14:26:36,098 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-10-11 14:26:36,098 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 14:26:36,098 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-10-11 14:26:36,098 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-10-11 14:26:36,099 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 28 [2024-10-11 14:26:36,099 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 170 places, 130 transitions, 2114 flow. Second operand has 10 states, 10 states have (on average 5.1) internal successors, (51), 10 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 14:26:36,099 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 14:26:36,099 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 28 [2024-10-11 14:26:36,099 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 14:26:36,466 INFO L124 PetriNetUnfolderBase]: 1760/3063 cut-off events. [2024-10-11 14:26:36,466 INFO L125 PetriNetUnfolderBase]: For 24401/24401 co-relation queries the response was YES. [2024-10-11 14:26:36,479 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15895 conditions, 3063 events. 1760/3063 cut-off events. For 24401/24401 co-relation queries the response was YES. Maximal size of possible extension queue 177. Compared 18009 event pairs, 880 based on Foata normal form. 4/3067 useless extension candidates. Maximal degree in co-relation 15815. Up to 2291 conditions per place. [2024-10-11 14:26:36,487 INFO L140 encePairwiseOnDemand]: 18/28 looper letters, 106 selfloop transitions, 52 changer transitions 3/162 dead transitions. [2024-10-11 14:26:36,487 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 178 places, 162 transitions, 2627 flow [2024-10-11 14:26:36,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-10-11 14:26:36,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-10-11 14:26:36,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 87 transitions. [2024-10-11 14:26:36,487 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.34523809523809523 [2024-10-11 14:26:36,487 INFO L175 Difference]: Start difference. First operand has 170 places, 130 transitions, 2114 flow. Second operand 9 states and 87 transitions. [2024-10-11 14:26:36,487 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 178 places, 162 transitions, 2627 flow [2024-10-11 14:26:36,540 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 173 places, 162 transitions, 2568 flow, removed 11 selfloop flow, removed 5 redundant places. [2024-10-11 14:26:36,542 INFO L231 Difference]: Finished difference. Result has 175 places, 131 transitions, 2173 flow [2024-10-11 14:26:36,542 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=2025, PETRI_DIFFERENCE_MINUEND_PLACES=165, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=129, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=77, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2173, PETRI_PLACES=175, PETRI_TRANSITIONS=131} [2024-10-11 14:26:36,543 INFO L277 CegarLoopForPetriNet]: 26 programPoint places, 149 predicate places. [2024-10-11 14:26:36,543 INFO L471 AbstractCegarLoop]: Abstraction has has 175 places, 131 transitions, 2173 flow [2024-10-11 14:26:36,543 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 5.1) internal successors, (51), 10 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 14:26:36,543 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 14:26:36,543 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 14:26:36,543 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2024-10-11 14:26:36,543 INFO L396 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-11 14:26:36,543 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 14:26:36,543 INFO L85 PathProgramCache]: Analyzing trace with hash -1034053993, now seen corresponding path program 13 times [2024-10-11 14:26:36,543 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 14:26:36,543 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [27090633] [2024-10-11 14:26:36,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 14:26:36,544 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 14:26:36,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 14:26:36,704 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-10-11 14:26:36,704 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 14:26:36,704 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [27090633] [2024-10-11 14:26:36,704 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [27090633] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-11 14:26:36,704 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1851399940] [2024-10-11 14:26:36,704 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-10-11 14:26:36,704 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 14:26:36,704 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 14:26:36,705 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-11 14:26:36,706 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2024-10-11 14:26:36,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 14:26:36,778 INFO L255 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 15 conjuncts are in the unsatisfiable core [2024-10-11 14:26:36,779 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 14:26:36,820 INFO L349 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2024-10-11 14:26:36,820 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 26 treesize of output 10 [2024-10-11 14:26:36,827 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-10-11 14:26:36,827 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-11 14:26:36,883 INFO L349 Elim1Store]: treesize reduction 28, result has 63.6 percent of original size [2024-10-11 14:26:36,883 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 40 treesize of output 56 [2024-10-11 14:26:36,895 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-10-11 14:26:36,896 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1851399940] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-11 14:26:36,896 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-11 14:26:36,896 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 7] total 18 [2024-10-11 14:26:36,896 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [873966867] [2024-10-11 14:26:36,896 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-11 14:26:36,896 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-10-11 14:26:36,896 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 14:26:36,896 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-10-11 14:26:36,896 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=245, Unknown=0, NotChecked=0, Total=306 [2024-10-11 14:26:36,897 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 28 [2024-10-11 14:26:36,897 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 175 places, 131 transitions, 2173 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) [2024-10-11 14:26:36,897 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 14:26:36,897 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 28 [2024-10-11 14:26:36,897 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 14:26:37,328 INFO L124 PetriNetUnfolderBase]: 1785/3102 cut-off events. [2024-10-11 14:26:37,329 INFO L125 PetriNetUnfolderBase]: For 25609/25609 co-relation queries the response was YES. [2024-10-11 14:26:37,343 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16400 conditions, 3102 events. 1785/3102 cut-off events. For 25609/25609 co-relation queries the response was YES. Maximal size of possible extension queue 182. Compared 18281 event pairs, 825 based on Foata normal form. 18/3120 useless extension candidates. Maximal degree in co-relation 16319. Up to 2114 conditions per place. [2024-10-11 14:26:37,351 INFO L140 encePairwiseOnDemand]: 17/28 looper letters, 127 selfloop transitions, 48 changer transitions 0/176 dead transitions. [2024-10-11 14:26:37,351 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 183 places, 176 transitions, 2876 flow [2024-10-11 14:26:37,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-10-11 14:26:37,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-10-11 14:26:37,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 108 transitions. [2024-10-11 14:26:37,352 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.38571428571428573 [2024-10-11 14:26:37,352 INFO L175 Difference]: Start difference. First operand has 175 places, 131 transitions, 2173 flow. Second operand 10 states and 108 transitions. [2024-10-11 14:26:37,352 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 183 places, 176 transitions, 2876 flow [2024-10-11 14:26:37,406 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 176 places, 176 transitions, 2768 flow, removed 1 selfloop flow, removed 7 redundant places. [2024-10-11 14:26:37,409 INFO L231 Difference]: Finished difference. Result has 178 places, 134 transitions, 2257 flow [2024-10-11 14:26:37,409 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=2065, PETRI_DIFFERENCE_MINUEND_PLACES=167, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=131, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=84, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2257, PETRI_PLACES=178, PETRI_TRANSITIONS=134} [2024-10-11 14:26:37,409 INFO L277 CegarLoopForPetriNet]: 26 programPoint places, 152 predicate places. [2024-10-11 14:26:37,409 INFO L471 AbstractCegarLoop]: Abstraction has has 178 places, 134 transitions, 2257 flow [2024-10-11 14:26:37,409 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) [2024-10-11 14:26:37,409 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 14:26:37,409 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 14:26:37,421 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2024-10-11 14:26:37,610 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47,23 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 14:26:37,610 INFO L396 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-11 14:26:37,610 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 14:26:37,610 INFO L85 PathProgramCache]: Analyzing trace with hash -1910976947, now seen corresponding path program 14 times [2024-10-11 14:26:37,610 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 14:26:37,610 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [353588239] [2024-10-11 14:26:37,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 14:26:37,610 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 14:26:37,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 14:26:37,780 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-10-11 14:26:37,780 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 14:26:37,780 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [353588239] [2024-10-11 14:26:37,780 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [353588239] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-11 14:26:37,780 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-11 14:26:37,780 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-10-11 14:26:37,780 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1960449264] [2024-10-11 14:26:37,780 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-11 14:26:37,780 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-10-11 14:26:37,780 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 14:26:37,781 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-10-11 14:26:37,781 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-10-11 14:26:37,781 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 28 [2024-10-11 14:26:37,781 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 178 places, 134 transitions, 2257 flow. Second operand has 10 states, 10 states have (on average 5.1) internal successors, (51), 10 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 14:26:37,781 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 14:26:37,781 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 28 [2024-10-11 14:26:37,781 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 14:26:38,175 INFO L124 PetriNetUnfolderBase]: 1780/3097 cut-off events. [2024-10-11 14:26:38,176 INFO L125 PetriNetUnfolderBase]: For 26161/26161 co-relation queries the response was YES. [2024-10-11 14:26:38,191 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16388 conditions, 3097 events. 1780/3097 cut-off events. For 26161/26161 co-relation queries the response was YES. Maximal size of possible extension queue 182. Compared 18314 event pairs, 875 based on Foata normal form. 5/3102 useless extension candidates. Maximal degree in co-relation 16304. Up to 2331 conditions per place. [2024-10-11 14:26:38,200 INFO L140 encePairwiseOnDemand]: 18/28 looper letters, 107 selfloop transitions, 50 changer transitions 4/162 dead transitions. [2024-10-11 14:26:38,200 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 186 places, 162 transitions, 2737 flow [2024-10-11 14:26:38,200 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-10-11 14:26:38,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-10-11 14:26:38,200 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 85 transitions. [2024-10-11 14:26:38,201 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.3373015873015873 [2024-10-11 14:26:38,201 INFO L175 Difference]: Start difference. First operand has 178 places, 134 transitions, 2257 flow. Second operand 9 states and 85 transitions. [2024-10-11 14:26:38,201 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 186 places, 162 transitions, 2737 flow [2024-10-11 14:26:38,264 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 181 places, 162 transitions, 2657 flow, removed 14 selfloop flow, removed 5 redundant places. [2024-10-11 14:26:38,266 INFO L231 Difference]: Finished difference. Result has 181 places, 132 transitions, 2236 flow [2024-10-11 14:26:38,266 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=2157, PETRI_DIFFERENCE_MINUEND_PLACES=173, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=133, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=83, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2236, PETRI_PLACES=181, PETRI_TRANSITIONS=132} [2024-10-11 14:26:38,267 INFO L277 CegarLoopForPetriNet]: 26 programPoint places, 155 predicate places. [2024-10-11 14:26:38,267 INFO L471 AbstractCegarLoop]: Abstraction has has 181 places, 132 transitions, 2236 flow [2024-10-11 14:26:38,267 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 5.1) internal successors, (51), 10 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 14:26:38,267 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 14:26:38,267 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 14:26:38,267 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2024-10-11 14:26:38,267 INFO L396 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-11 14:26:38,267 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 14:26:38,267 INFO L85 PathProgramCache]: Analyzing trace with hash 222114165, now seen corresponding path program 15 times [2024-10-11 14:26:38,267 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 14:26:38,267 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [98763800] [2024-10-11 14:26:38,267 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 14:26:38,268 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 14:26:38,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 14:26:38,445 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-10-11 14:26:38,445 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 14:26:38,445 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [98763800] [2024-10-11 14:26:38,445 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [98763800] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-11 14:26:38,445 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [564405705] [2024-10-11 14:26:38,445 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-10-11 14:26:38,445 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 14:26:38,445 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 14:26:38,446 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-11 14:26:38,447 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2024-10-11 14:26:38,525 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-10-11 14:26:38,525 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-11 14:26:38,526 INFO L255 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 25 conjuncts are in the unsatisfiable core [2024-10-11 14:26:38,527 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 14:26:38,581 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-11 14:26:38,581 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 29 treesize of output 21 [2024-10-11 14:26:38,600 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-10-11 14:26:38,600 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-11 14:26:38,683 INFO L349 Elim1Store]: treesize reduction 28, result has 59.4 percent of original size [2024-10-11 14:26:38,683 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 32 treesize of output 48 [2024-10-11 14:26:38,704 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-10-11 14:26:38,704 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [564405705] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-11 14:26:38,704 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-11 14:26:38,704 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 7] total 18 [2024-10-11 14:26:38,704 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1892039667] [2024-10-11 14:26:38,704 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-11 14:26:38,705 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-10-11 14:26:38,705 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 14:26:38,705 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-10-11 14:26:38,705 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=241, Unknown=0, NotChecked=0, Total=306 [2024-10-11 14:26:38,705 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 28 [2024-10-11 14:26:38,705 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 181 places, 132 transitions, 2236 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) [2024-10-11 14:26:38,705 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 14:26:38,705 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 28 [2024-10-11 14:26:38,706 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 14:26:39,349 INFO L124 PetriNetUnfolderBase]: 1853/3215 cut-off events. [2024-10-11 14:26:39,350 INFO L125 PetriNetUnfolderBase]: For 25478/25478 co-relation queries the response was YES. [2024-10-11 14:26:39,366 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16799 conditions, 3215 events. 1853/3215 cut-off events. For 25478/25478 co-relation queries the response was YES. Maximal size of possible extension queue 182. Compared 19048 event pairs, 662 based on Foata normal form. 18/3233 useless extension candidates. Maximal degree in co-relation 16716. Up to 1692 conditions per place. [2024-10-11 14:26:39,374 INFO L140 encePairwiseOnDemand]: 17/28 looper letters, 141 selfloop transitions, 64 changer transitions 0/206 dead transitions. [2024-10-11 14:26:39,374 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 193 places, 206 transitions, 3261 flow [2024-10-11 14:26:39,374 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-10-11 14:26:39,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2024-10-11 14:26:39,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 133 transitions. [2024-10-11 14:26:39,375 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.3392857142857143 [2024-10-11 14:26:39,376 INFO L175 Difference]: Start difference. First operand has 181 places, 132 transitions, 2236 flow. Second operand 14 states and 133 transitions. [2024-10-11 14:26:39,376 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 193 places, 206 transitions, 3261 flow [2024-10-11 14:26:39,442 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 186 places, 206 transitions, 3113 flow, removed 6 selfloop flow, removed 7 redundant places. [2024-10-11 14:26:39,445 INFO L231 Difference]: Finished difference. Result has 191 places, 142 transitions, 2398 flow [2024-10-11 14:26:39,445 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=2094, PETRI_DIFFERENCE_MINUEND_PLACES=173, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=132, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=56, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=72, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=2398, PETRI_PLACES=191, PETRI_TRANSITIONS=142} [2024-10-11 14:26:39,446 INFO L277 CegarLoopForPetriNet]: 26 programPoint places, 165 predicate places. [2024-10-11 14:26:39,446 INFO L471 AbstractCegarLoop]: Abstraction has has 191 places, 142 transitions, 2398 flow [2024-10-11 14:26:39,446 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) [2024-10-11 14:26:39,446 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 14:26:39,446 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 14:26:39,458 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2024-10-11 14:26:39,646 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49,24 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 14:26:39,647 INFO L396 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-11 14:26:39,647 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 14:26:39,647 INFO L85 PathProgramCache]: Analyzing trace with hash -1016050527, now seen corresponding path program 13 times [2024-10-11 14:26:39,647 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 14:26:39,647 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [542138286] [2024-10-11 14:26:39,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 14:26:39,647 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 14:26:39,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 14:26:39,802 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-10-11 14:26:39,802 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 14:26:39,802 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [542138286] [2024-10-11 14:26:39,802 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [542138286] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-11 14:26:39,802 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-11 14:26:39,802 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-10-11 14:26:39,802 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1743444287] [2024-10-11 14:26:39,802 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-11 14:26:39,802 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-10-11 14:26:39,802 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 14:26:39,803 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-10-11 14:26:39,803 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-10-11 14:26:39,803 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 28 [2024-10-11 14:26:39,803 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 191 places, 142 transitions, 2398 flow. Second operand has 10 states, 10 states have (on average 5.1) internal successors, (51), 10 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 14:26:39,803 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 14:26:39,803 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 28 [2024-10-11 14:26:39,803 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 14:26:40,253 INFO L124 PetriNetUnfolderBase]: 1849/3211 cut-off events. [2024-10-11 14:26:40,253 INFO L125 PetriNetUnfolderBase]: For 24720/24720 co-relation queries the response was YES. [2024-10-11 14:26:40,268 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17015 conditions, 3211 events. 1849/3211 cut-off events. For 24720/24720 co-relation queries the response was YES. Maximal size of possible extension queue 181. Compared 19046 event pairs, 917 based on Foata normal form. 4/3215 useless extension candidates. Maximal degree in co-relation 16926. Up to 2457 conditions per place. [2024-10-11 14:26:40,276 INFO L140 encePairwiseOnDemand]: 19/28 looper letters, 124 selfloop transitions, 47 changer transitions 6/178 dead transitions. [2024-10-11 14:26:40,276 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 199 places, 178 transitions, 2959 flow [2024-10-11 14:26:40,276 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-10-11 14:26:40,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-10-11 14:26:40,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 87 transitions. [2024-10-11 14:26:40,277 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.34523809523809523 [2024-10-11 14:26:40,277 INFO L175 Difference]: Start difference. First operand has 191 places, 142 transitions, 2398 flow. Second operand 9 states and 87 transitions. [2024-10-11 14:26:40,277 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 199 places, 178 transitions, 2959 flow [2024-10-11 14:26:40,350 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 192 places, 178 transitions, 2875 flow, removed 6 selfloop flow, removed 7 redundant places. [2024-10-11 14:26:40,352 INFO L231 Difference]: Finished difference. Result has 193 places, 140 transitions, 2356 flow [2024-10-11 14:26:40,352 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=2283, PETRI_DIFFERENCE_MINUEND_PLACES=184, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=141, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=94, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2356, PETRI_PLACES=193, PETRI_TRANSITIONS=140} [2024-10-11 14:26:40,353 INFO L277 CegarLoopForPetriNet]: 26 programPoint places, 167 predicate places. [2024-10-11 14:26:40,353 INFO L471 AbstractCegarLoop]: Abstraction has has 193 places, 140 transitions, 2356 flow [2024-10-11 14:26:40,353 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 5.1) internal successors, (51), 10 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 14:26:40,353 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 14:26:40,353 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 14:26:40,353 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2024-10-11 14:26:40,353 INFO L396 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-11 14:26:40,353 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 14:26:40,353 INFO L85 PathProgramCache]: Analyzing trace with hash 1691282855, now seen corresponding path program 16 times [2024-10-11 14:26:40,353 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 14:26:40,353 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1755743826] [2024-10-11 14:26:40,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 14:26:40,353 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 14:26:40,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 14:26:40,501 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-10-11 14:26:40,501 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 14:26:40,502 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1755743826] [2024-10-11 14:26:40,502 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1755743826] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-11 14:26:40,502 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-11 14:26:40,502 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-10-11 14:26:40,502 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1000619237] [2024-10-11 14:26:40,502 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-11 14:26:40,502 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-10-11 14:26:40,502 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 14:26:40,502 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-10-11 14:26:40,502 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-10-11 14:26:40,502 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 28 [2024-10-11 14:26:40,503 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 193 places, 140 transitions, 2356 flow. Second operand has 10 states, 10 states have (on average 5.1) internal successors, (51), 10 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 14:26:40,503 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 14:26:40,503 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 28 [2024-10-11 14:26:40,503 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 14:26:40,958 INFO L124 PetriNetUnfolderBase]: 1841/3200 cut-off events. [2024-10-11 14:26:40,958 INFO L125 PetriNetUnfolderBase]: For 26274/26274 co-relation queries the response was YES. [2024-10-11 14:26:40,973 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17111 conditions, 3200 events. 1841/3200 cut-off events. For 26274/26274 co-relation queries the response was YES. Maximal size of possible extension queue 182. Compared 18939 event pairs, 964 based on Foata normal form. 5/3205 useless extension candidates. Maximal degree in co-relation 17022. Up to 2457 conditions per place. [2024-10-11 14:26:40,983 INFO L140 encePairwiseOnDemand]: 19/28 looper letters, 117 selfloop transitions, 43 changer transitions 4/165 dead transitions. [2024-10-11 14:26:40,984 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 198 places, 165 transitions, 2811 flow [2024-10-11 14:26:40,984 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-10-11 14:26:40,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-10-11 14:26:40,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 87 transitions. [2024-10-11 14:26:40,984 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.34523809523809523 [2024-10-11 14:26:40,984 INFO L175 Difference]: Start difference. First operand has 193 places, 140 transitions, 2356 flow. Second operand 9 states and 87 transitions. [2024-10-11 14:26:40,984 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 198 places, 165 transitions, 2811 flow [2024-10-11 14:26:41,054 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 190 places, 165 transitions, 2668 flow, removed 2 selfloop flow, removed 8 redundant places. [2024-10-11 14:26:41,056 INFO L231 Difference]: Finished difference. Result has 191 places, 140 transitions, 2309 flow [2024-10-11 14:26:41,056 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=2219, PETRI_DIFFERENCE_MINUEND_PLACES=182, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=140, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=97, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2309, PETRI_PLACES=191, PETRI_TRANSITIONS=140} [2024-10-11 14:26:41,057 INFO L277 CegarLoopForPetriNet]: 26 programPoint places, 165 predicate places. [2024-10-11 14:26:41,057 INFO L471 AbstractCegarLoop]: Abstraction has has 191 places, 140 transitions, 2309 flow [2024-10-11 14:26:41,057 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 5.1) internal successors, (51), 10 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 14:26:41,057 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 14:26:41,057 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 14:26:41,057 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2024-10-11 14:26:41,057 INFO L396 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-11 14:26:41,057 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 14:26:41,058 INFO L85 PathProgramCache]: Analyzing trace with hash 1216445901, now seen corresponding path program 17 times [2024-10-11 14:26:41,058 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 14:26:41,058 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [498082361] [2024-10-11 14:26:41,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 14:26:41,058 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 14:26:41,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 14:26:41,283 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-10-11 14:26:41,284 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 14:26:41,284 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [498082361] [2024-10-11 14:26:41,284 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [498082361] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-11 14:26:41,284 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-11 14:26:41,284 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-10-11 14:26:41,284 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1978457631] [2024-10-11 14:26:41,284 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-11 14:26:41,285 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-10-11 14:26:41,285 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 14:26:41,285 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-10-11 14:26:41,285 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-10-11 14:26:41,286 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 28 [2024-10-11 14:26:41,286 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 191 places, 140 transitions, 2309 flow. Second operand has 10 states, 10 states have (on average 5.1) internal successors, (51), 10 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 14:26:41,286 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 14:26:41,286 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 28 [2024-10-11 14:26:41,286 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 14:26:41,728 INFO L124 PetriNetUnfolderBase]: 1843/3204 cut-off events. [2024-10-11 14:26:41,728 INFO L125 PetriNetUnfolderBase]: For 24837/24837 co-relation queries the response was YES. [2024-10-11 14:26:41,744 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17003 conditions, 3204 events. 1843/3204 cut-off events. For 24837/24837 co-relation queries the response was YES. Maximal size of possible extension queue 182. Compared 18980 event pairs, 966 based on Foata normal form. 5/3209 useless extension candidates. Maximal degree in co-relation 16915. Up to 2459 conditions per place. [2024-10-11 14:26:41,752 INFO L140 encePairwiseOnDemand]: 18/28 looper letters, 116 selfloop transitions, 45 changer transitions 7/169 dead transitions. [2024-10-11 14:26:41,752 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 198 places, 169 transitions, 2861 flow [2024-10-11 14:26:41,752 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-10-11 14:26:41,752 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-10-11 14:26:41,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 92 transitions. [2024-10-11 14:26:41,752 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.36507936507936506 [2024-10-11 14:26:41,752 INFO L175 Difference]: Start difference. First operand has 191 places, 140 transitions, 2309 flow. Second operand 9 states and 92 transitions. [2024-10-11 14:26:41,752 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 198 places, 169 transitions, 2861 flow [2024-10-11 14:26:41,814 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 190 places, 169 transitions, 2762 flow, removed 0 selfloop flow, removed 8 redundant places. [2024-10-11 14:26:41,816 INFO L231 Difference]: Finished difference. Result has 192 places, 144 transitions, 2403 flow [2024-10-11 14:26:41,816 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=2220, PETRI_DIFFERENCE_MINUEND_PLACES=182, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=140, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=98, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2403, PETRI_PLACES=192, PETRI_TRANSITIONS=144} [2024-10-11 14:26:41,816 INFO L277 CegarLoopForPetriNet]: 26 programPoint places, 166 predicate places. [2024-10-11 14:26:41,816 INFO L471 AbstractCegarLoop]: Abstraction has has 192 places, 144 transitions, 2403 flow [2024-10-11 14:26:41,816 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 5.1) internal successors, (51), 10 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 14:26:41,816 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 14:26:41,817 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 14:26:41,817 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2024-10-11 14:26:41,817 INFO L396 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-11 14:26:41,817 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 14:26:41,817 INFO L85 PathProgramCache]: Analyzing trace with hash 213244371, now seen corresponding path program 18 times [2024-10-11 14:26:41,817 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 14:26:41,817 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [650419652] [2024-10-11 14:26:41,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 14:26:41,817 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 14:26:41,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 14:26:41,982 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-10-11 14:26:41,982 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 14:26:41,982 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [650419652] [2024-10-11 14:26:41,982 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [650419652] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-11 14:26:41,982 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1871868033] [2024-10-11 14:26:41,982 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-10-11 14:26:41,983 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 14:26:41,983 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 14:26:41,983 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-11 14:26:41,984 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2024-10-11 14:26:42,058 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2024-10-11 14:26:42,058 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-11 14:26:42,059 INFO L255 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 25 conjuncts are in the unsatisfiable core [2024-10-11 14:26:42,060 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 14:26:42,097 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-11 14:26:42,097 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 29 treesize of output 21 [2024-10-11 14:26:42,113 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-10-11 14:26:42,113 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-11 14:26:42,161 INFO L349 Elim1Store]: treesize reduction 28, result has 63.6 percent of original size [2024-10-11 14:26:42,161 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 40 treesize of output 56 [2024-10-11 14:26:42,179 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-10-11 14:26:42,179 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1871868033] provided 1 perfect and 1 imperfect interpolant sequences [2024-10-11 14:26:42,179 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-10-11 14:26:42,179 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [9, 9] total 17 [2024-10-11 14:26:42,180 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1588133804] [2024-10-11 14:26:42,180 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-11 14:26:42,180 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-10-11 14:26:42,180 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 14:26:42,180 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-10-11 14:26:42,180 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2024-10-11 14:26:42,180 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 28 [2024-10-11 14:26:42,180 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 192 places, 144 transitions, 2403 flow. Second operand has 7 states, 7 states have (on average 6.0) internal successors, (42), 7 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 14:26:42,180 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 14:26:42,180 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 28 [2024-10-11 14:26:42,180 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 14:26:42,634 INFO L124 PetriNetUnfolderBase]: 1913/3341 cut-off events. [2024-10-11 14:26:42,634 INFO L125 PetriNetUnfolderBase]: For 27059/27059 co-relation queries the response was YES. [2024-10-11 14:26:42,655 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17715 conditions, 3341 events. 1913/3341 cut-off events. For 27059/27059 co-relation queries the response was YES. Maximal size of possible extension queue 194. Compared 20148 event pairs, 962 based on Foata normal form. 18/3359 useless extension candidates. Maximal degree in co-relation 17625. Up to 2477 conditions per place. [2024-10-11 14:26:42,665 INFO L140 encePairwiseOnDemand]: 20/28 looper letters, 131 selfloop transitions, 46 changer transitions 3/181 dead transitions. [2024-10-11 14:26:42,666 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 197 places, 181 transitions, 3003 flow [2024-10-11 14:26:42,666 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-10-11 14:26:42,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-10-11 14:26:42,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 93 transitions. [2024-10-11 14:26:42,666 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4744897959183674 [2024-10-11 14:26:42,666 INFO L175 Difference]: Start difference. First operand has 192 places, 144 transitions, 2403 flow. Second operand 7 states and 93 transitions. [2024-10-11 14:26:42,666 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 197 places, 181 transitions, 3003 flow [2024-10-11 14:26:42,740 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 190 places, 181 transitions, 2896 flow, removed 2 selfloop flow, removed 7 redundant places. [2024-10-11 14:26:42,743 INFO L231 Difference]: Finished difference. Result has 193 places, 147 transitions, 2483 flow [2024-10-11 14:26:42,743 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=2302, PETRI_DIFFERENCE_MINUEND_PLACES=184, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=144, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=98, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2483, PETRI_PLACES=193, PETRI_TRANSITIONS=147} [2024-10-11 14:26:42,743 INFO L277 CegarLoopForPetriNet]: 26 programPoint places, 167 predicate places. [2024-10-11 14:26:42,743 INFO L471 AbstractCegarLoop]: Abstraction has has 193 places, 147 transitions, 2483 flow [2024-10-11 14:26:42,743 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 6.0) internal successors, (42), 7 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 14:26:42,743 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 14:26:42,743 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 14:26:42,755 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Ended with exit code 0 [2024-10-11 14:26:42,943 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable53 [2024-10-11 14:26:42,944 INFO L396 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-11 14:26:42,944 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 14:26:42,944 INFO L85 PathProgramCache]: Analyzing trace with hash -63705097, now seen corresponding path program 19 times [2024-10-11 14:26:42,945 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 14:26:42,945 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [28453006] [2024-10-11 14:26:42,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 14:26:42,945 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 14:26:42,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 14:26:43,112 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-10-11 14:26:43,112 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 14:26:43,112 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [28453006] [2024-10-11 14:26:43,112 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [28453006] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-11 14:26:43,112 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [141304227] [2024-10-11 14:26:43,112 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-10-11 14:26:43,112 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 14:26:43,112 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 14:26:43,114 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-11 14:26:43,115 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2024-10-11 14:26:43,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 14:26:43,188 INFO L255 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 15 conjuncts are in the unsatisfiable core [2024-10-11 14:26:43,189 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 14:26:43,215 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-11 14:26:43,215 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 29 treesize of output 25 [2024-10-11 14:26:43,229 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-10-11 14:26:43,229 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-11 14:26:43,290 INFO L349 Elim1Store]: treesize reduction 28, result has 63.6 percent of original size [2024-10-11 14:26:43,290 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 40 treesize of output 56 [2024-10-11 14:26:43,308 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-10-11 14:26:43,308 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [141304227] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-11 14:26:43,308 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-11 14:26:43,308 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 7] total 18 [2024-10-11 14:26:43,309 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [474199205] [2024-10-11 14:26:43,309 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-11 14:26:43,309 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-10-11 14:26:43,309 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 14:26:43,309 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-10-11 14:26:43,310 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=241, Unknown=0, NotChecked=0, Total=306 [2024-10-11 14:26:43,310 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 28 [2024-10-11 14:26:43,310 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 193 places, 147 transitions, 2483 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) [2024-10-11 14:26:43,310 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 14:26:43,310 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 28 [2024-10-11 14:26:43,310 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 14:26:43,901 INFO L124 PetriNetUnfolderBase]: 1850/3224 cut-off events. [2024-10-11 14:26:43,901 INFO L125 PetriNetUnfolderBase]: For 26527/26527 co-relation queries the response was YES. [2024-10-11 14:26:43,920 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17248 conditions, 3224 events. 1850/3224 cut-off events. For 26527/26527 co-relation queries the response was YES. Maximal size of possible extension queue 186. Compared 19167 event pairs, 925 based on Foata normal form. 18/3241 useless extension candidates. Maximal degree in co-relation 17156. Up to 2394 conditions per place. [2024-10-11 14:26:43,929 INFO L140 encePairwiseOnDemand]: 17/28 looper letters, 132 selfloop transitions, 56 changer transitions 4/193 dead transitions. [2024-10-11 14:26:43,929 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 205 places, 193 transitions, 3142 flow [2024-10-11 14:26:43,929 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-10-11 14:26:43,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-10-11 14:26:43,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 129 transitions. [2024-10-11 14:26:43,930 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.3543956043956044 [2024-10-11 14:26:43,930 INFO L175 Difference]: Start difference. First operand has 193 places, 147 transitions, 2483 flow. Second operand 13 states and 129 transitions. [2024-10-11 14:26:43,930 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 205 places, 193 transitions, 3142 flow [2024-10-11 14:26:43,997 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 201 places, 193 transitions, 3036 flow, removed 16 selfloop flow, removed 4 redundant places. [2024-10-11 14:26:43,999 INFO L231 Difference]: Finished difference. Result has 203 places, 152 transitions, 2568 flow [2024-10-11 14:26:43,999 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=2368, PETRI_DIFFERENCE_MINUEND_PLACES=189, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=146, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=93, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=2568, PETRI_PLACES=203, PETRI_TRANSITIONS=152} [2024-10-11 14:26:43,999 INFO L277 CegarLoopForPetriNet]: 26 programPoint places, 177 predicate places. [2024-10-11 14:26:44,000 INFO L471 AbstractCegarLoop]: Abstraction has has 203 places, 152 transitions, 2568 flow [2024-10-11 14:26:44,000 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) [2024-10-11 14:26:44,000 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 14:26:44,000 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 14:26:44,012 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Ended with exit code 0 [2024-10-11 14:26:44,200 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable54 [2024-10-11 14:26:44,200 INFO L396 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-11 14:26:44,201 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 14:26:44,201 INFO L85 PathProgramCache]: Analyzing trace with hash 158368447, now seen corresponding path program 14 times [2024-10-11 14:26:44,201 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 14:26:44,201 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [695396541] [2024-10-11 14:26:44,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 14:26:44,201 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 14:26:44,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 14:26:44,368 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-10-11 14:26:44,368 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 14:26:44,368 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [695396541] [2024-10-11 14:26:44,368 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [695396541] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-11 14:26:44,368 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-11 14:26:44,368 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-10-11 14:26:44,368 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2031451121] [2024-10-11 14:26:44,368 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-11 14:26:44,368 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-10-11 14:26:44,368 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 14:26:44,369 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-10-11 14:26:44,369 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-10-11 14:26:44,369 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 28 [2024-10-11 14:26:44,369 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 203 places, 152 transitions, 2568 flow. Second operand has 10 states, 10 states have (on average 5.1) internal successors, (51), 10 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 14:26:44,369 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 14:26:44,369 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 28 [2024-10-11 14:26:44,369 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 14:26:44,815 INFO L124 PetriNetUnfolderBase]: 1840/3205 cut-off events. [2024-10-11 14:26:44,815 INFO L125 PetriNetUnfolderBase]: For 23246/23246 co-relation queries the response was YES. [2024-10-11 14:26:44,831 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17098 conditions, 3205 events. 1840/3205 cut-off events. For 23246/23246 co-relation queries the response was YES. Maximal size of possible extension queue 186. Compared 19090 event pairs, 922 based on Foata normal form. 4/3209 useless extension candidates. Maximal degree in co-relation 17003. Up to 2471 conditions per place. [2024-10-11 14:26:44,842 INFO L140 encePairwiseOnDemand]: 19/28 looper letters, 120 selfloop transitions, 52 changer transitions 7/180 dead transitions. [2024-10-11 14:26:44,842 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 211 places, 180 transitions, 3073 flow [2024-10-11 14:26:44,842 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-10-11 14:26:44,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-10-11 14:26:44,843 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 84 transitions. [2024-10-11 14:26:44,843 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.3333333333333333 [2024-10-11 14:26:44,843 INFO L175 Difference]: Start difference. First operand has 203 places, 152 transitions, 2568 flow. Second operand 9 states and 84 transitions. [2024-10-11 14:26:44,843 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 211 places, 180 transitions, 3073 flow [2024-10-11 14:26:44,908 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 193 places, 180 transitions, 2956 flow, removed 5 selfloop flow, removed 18 redundant places. [2024-10-11 14:26:44,911 INFO L231 Difference]: Finished difference. Result has 194 places, 150 transitions, 2513 flow [2024-10-11 14:26:44,911 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=2422, PETRI_DIFFERENCE_MINUEND_PLACES=185, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=151, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=52, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=99, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2513, PETRI_PLACES=194, PETRI_TRANSITIONS=150} [2024-10-11 14:26:44,911 INFO L277 CegarLoopForPetriNet]: 26 programPoint places, 168 predicate places. [2024-10-11 14:26:44,911 INFO L471 AbstractCegarLoop]: Abstraction has has 194 places, 150 transitions, 2513 flow [2024-10-11 14:26:44,912 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 5.1) internal successors, (51), 10 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 14:26:44,912 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 14:26:44,912 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 14:26:44,912 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2024-10-11 14:26:44,912 INFO L396 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-11 14:26:44,912 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 14:26:44,912 INFO L85 PathProgramCache]: Analyzing trace with hash 1921818819, now seen corresponding path program 15 times [2024-10-11 14:26:44,912 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 14:26:44,912 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1765123974] [2024-10-11 14:26:44,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 14:26:44,913 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 14:26:44,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 14:26:45,091 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-10-11 14:26:45,092 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 14:26:45,092 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1765123974] [2024-10-11 14:26:45,092 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1765123974] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-11 14:26:45,092 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-11 14:26:45,092 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-10-11 14:26:45,092 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1610413433] [2024-10-11 14:26:45,092 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-11 14:26:45,093 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-10-11 14:26:45,093 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 14:26:45,093 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-10-11 14:26:45,093 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2024-10-11 14:26:45,093 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 28 [2024-10-11 14:26:45,093 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 194 places, 150 transitions, 2513 flow. Second operand has 10 states, 10 states have (on average 5.1) internal successors, (51), 10 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 14:26:45,093 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 14:26:45,094 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 28 [2024-10-11 14:26:45,094 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 14:26:45,528 INFO L124 PetriNetUnfolderBase]: 1864/3242 cut-off events. [2024-10-11 14:26:45,528 INFO L125 PetriNetUnfolderBase]: For 24971/24971 co-relation queries the response was YES. [2024-10-11 14:26:45,547 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17571 conditions, 3242 events. 1864/3242 cut-off events. For 24971/24971 co-relation queries the response was YES. Maximal size of possible extension queue 191. Compared 19317 event pairs, 914 based on Foata normal form. 21/3263 useless extension candidates. Maximal degree in co-relation 17487. Up to 2492 conditions per place. [2024-10-11 14:26:45,558 INFO L140 encePairwiseOnDemand]: 19/28 looper letters, 128 selfloop transitions, 54 changer transitions 1/184 dead transitions. [2024-10-11 14:26:45,558 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 199 places, 184 transitions, 3106 flow [2024-10-11 14:26:45,559 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-10-11 14:26:45,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-10-11 14:26:45,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 88 transitions. [2024-10-11 14:26:45,559 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.3492063492063492 [2024-10-11 14:26:45,559 INFO L175 Difference]: Start difference. First operand has 194 places, 150 transitions, 2513 flow. Second operand 9 states and 88 transitions. [2024-10-11 14:26:45,559 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 199 places, 184 transitions, 3106 flow [2024-10-11 14:26:45,629 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 190 places, 184 transitions, 2978 flow, removed 1 selfloop flow, removed 9 redundant places. [2024-10-11 14:26:45,632 INFO L231 Difference]: Finished difference. Result has 190 places, 151 transitions, 2518 flow [2024-10-11 14:26:45,632 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=2387, PETRI_DIFFERENCE_MINUEND_PLACES=182, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=150, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=97, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2518, PETRI_PLACES=190, PETRI_TRANSITIONS=151} [2024-10-11 14:26:45,632 INFO L277 CegarLoopForPetriNet]: 26 programPoint places, 164 predicate places. [2024-10-11 14:26:45,632 INFO L471 AbstractCegarLoop]: Abstraction has has 190 places, 151 transitions, 2518 flow [2024-10-11 14:26:45,632 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 5.1) internal successors, (51), 10 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 14:26:45,632 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 14:26:45,632 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 14:26:45,633 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2024-10-11 14:26:45,633 INFO L396 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-11 14:26:45,633 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 14:26:45,633 INFO L85 PathProgramCache]: Analyzing trace with hash -1919846741, now seen corresponding path program 20 times [2024-10-11 14:26:45,633 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 14:26:45,633 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1235527872] [2024-10-11 14:26:45,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 14:26:45,633 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 14:26:45,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 14:26:45,790 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-10-11 14:26:45,791 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 14:26:45,791 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1235527872] [2024-10-11 14:26:45,791 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1235527872] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-11 14:26:45,791 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-11 14:26:45,791 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-10-11 14:26:45,791 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1763064915] [2024-10-11 14:26:45,791 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-11 14:26:45,791 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-10-11 14:26:45,791 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 14:26:45,792 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-10-11 14:26:45,792 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-10-11 14:26:45,792 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 28 [2024-10-11 14:26:45,792 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 190 places, 151 transitions, 2518 flow. Second operand has 10 states, 10 states have (on average 5.1) internal successors, (51), 10 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 14:26:45,792 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 14:26:45,792 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 28 [2024-10-11 14:26:45,792 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 14:26:46,193 INFO L124 PetriNetUnfolderBase]: 1814/3138 cut-off events. [2024-10-11 14:26:46,193 INFO L125 PetriNetUnfolderBase]: For 23923/23923 co-relation queries the response was YES. [2024-10-11 14:26:46,210 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17160 conditions, 3138 events. 1814/3138 cut-off events. For 23923/23923 co-relation queries the response was YES. Maximal size of possible extension queue 183. Compared 18402 event pairs, 912 based on Foata normal form. 5/3143 useless extension candidates. Maximal degree in co-relation 17077. Up to 2391 conditions per place. [2024-10-11 14:26:46,218 INFO L140 encePairwiseOnDemand]: 18/28 looper letters, 119 selfloop transitions, 46 changer transitions 7/173 dead transitions. [2024-10-11 14:26:46,218 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 198 places, 173 transitions, 2940 flow [2024-10-11 14:26:46,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-10-11 14:26:46,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-10-11 14:26:46,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 89 transitions. [2024-10-11 14:26:46,219 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.3531746031746032 [2024-10-11 14:26:46,219 INFO L175 Difference]: Start difference. First operand has 190 places, 151 transitions, 2518 flow. Second operand 9 states and 89 transitions. [2024-10-11 14:26:46,219 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 198 places, 173 transitions, 2940 flow [2024-10-11 14:26:46,288 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 191 places, 173 transitions, 2828 flow, removed 3 selfloop flow, removed 7 redundant places. [2024-10-11 14:26:46,290 INFO L231 Difference]: Finished difference. Result has 191 places, 149 transitions, 2451 flow [2024-10-11 14:26:46,291 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=2378, PETRI_DIFFERENCE_MINUEND_PLACES=183, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=150, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=104, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2451, PETRI_PLACES=191, PETRI_TRANSITIONS=149} [2024-10-11 14:26:46,291 INFO L277 CegarLoopForPetriNet]: 26 programPoint places, 165 predicate places. [2024-10-11 14:26:46,291 INFO L471 AbstractCegarLoop]: Abstraction has has 191 places, 149 transitions, 2451 flow [2024-10-11 14:26:46,291 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 5.1) internal successors, (51), 10 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 14:26:46,291 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 14:26:46,292 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 14:26:46,292 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2024-10-11 14:26:46,292 INFO L396 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-11 14:26:46,292 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 14:26:46,292 INFO L85 PathProgramCache]: Analyzing trace with hash -1039842413, now seen corresponding path program 16 times [2024-10-11 14:26:46,292 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 14:26:46,292 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1401257661] [2024-10-11 14:26:46,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 14:26:46,292 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 14:26:46,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 14:26:46,466 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-10-11 14:26:46,466 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 14:26:46,466 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1401257661] [2024-10-11 14:26:46,466 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1401257661] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-11 14:26:46,466 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-11 14:26:46,466 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-10-11 14:26:46,467 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [235665049] [2024-10-11 14:26:46,467 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-11 14:26:46,467 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-10-11 14:26:46,467 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 14:26:46,467 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-10-11 14:26:46,467 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-10-11 14:26:46,467 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 28 [2024-10-11 14:26:46,468 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 191 places, 149 transitions, 2451 flow. Second operand has 10 states, 10 states have (on average 5.1) internal successors, (51), 10 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 14:26:46,468 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 14:26:46,468 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 28 [2024-10-11 14:26:46,468 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 14:26:46,909 INFO L124 PetriNetUnfolderBase]: 1810/3128 cut-off events. [2024-10-11 14:26:46,909 INFO L125 PetriNetUnfolderBase]: For 23314/23314 co-relation queries the response was YES. [2024-10-11 14:26:46,925 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16944 conditions, 3128 events. 1810/3128 cut-off events. For 23314/23314 co-relation queries the response was YES. Maximal size of possible extension queue 182. Compared 18274 event pairs, 914 based on Foata normal form. 4/3132 useless extension candidates. Maximal degree in co-relation 16861. Up to 2391 conditions per place. [2024-10-11 14:26:46,933 INFO L140 encePairwiseOnDemand]: 19/28 looper letters, 119 selfloop transitions, 45 changer transitions 3/168 dead transitions. [2024-10-11 14:26:46,933 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 195 places, 168 transitions, 2864 flow [2024-10-11 14:26:46,934 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-10-11 14:26:46,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-10-11 14:26:46,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 84 transitions. [2024-10-11 14:26:46,934 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.3333333333333333 [2024-10-11 14:26:46,934 INFO L175 Difference]: Start difference. First operand has 191 places, 149 transitions, 2451 flow. Second operand 9 states and 84 transitions. [2024-10-11 14:26:46,934 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 195 places, 168 transitions, 2864 flow [2024-10-11 14:26:46,995 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 182 places, 168 transitions, 2704 flow, removed 3 selfloop flow, removed 13 redundant places. [2024-10-11 14:26:46,997 INFO L231 Difference]: Finished difference. Result has 182 places, 148 transitions, 2363 flow [2024-10-11 14:26:46,997 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=2291, PETRI_DIFFERENCE_MINUEND_PLACES=174, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=149, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=104, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2363, PETRI_PLACES=182, PETRI_TRANSITIONS=148} [2024-10-11 14:26:46,997 INFO L277 CegarLoopForPetriNet]: 26 programPoint places, 156 predicate places. [2024-10-11 14:26:46,998 INFO L471 AbstractCegarLoop]: Abstraction has has 182 places, 148 transitions, 2363 flow [2024-10-11 14:26:46,998 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 5.1) internal successors, (51), 10 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 14:26:46,998 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 14:26:46,998 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 14:26:46,998 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2024-10-11 14:26:46,998 INFO L396 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-11 14:26:46,998 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 14:26:46,998 INFO L85 PathProgramCache]: Analyzing trace with hash 484113445, now seen corresponding path program 17 times [2024-10-11 14:26:46,998 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 14:26:46,998 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1196725009] [2024-10-11 14:26:46,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 14:26:46,998 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 14:26:47,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 14:26:47,158 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-10-11 14:26:47,158 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 14:26:47,158 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1196725009] [2024-10-11 14:26:47,158 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1196725009] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-11 14:26:47,158 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [960215846] [2024-10-11 14:26:47,159 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-10-11 14:26:47,159 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 14:26:47,159 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 14:26:47,160 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-11 14:26:47,160 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2024-10-11 14:26:47,235 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-11 14:26:47,235 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-11 14:26:47,236 INFO L255 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 25 conjuncts are in the unsatisfiable core [2024-10-11 14:26:47,237 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 14:26:47,276 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-11 14:26:47,276 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 29 treesize of output 21 [2024-10-11 14:26:47,290 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-10-11 14:26:47,290 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-11 14:26:47,337 INFO L349 Elim1Store]: treesize reduction 28, result has 63.6 percent of original size [2024-10-11 14:26:47,337 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 40 treesize of output 56 [2024-10-11 14:26:47,357 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-10-11 14:26:47,358 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [960215846] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-11 14:26:47,358 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-11 14:26:47,358 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 7] total 17 [2024-10-11 14:26:47,358 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1367635501] [2024-10-11 14:26:47,358 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-11 14:26:47,358 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-10-11 14:26:47,358 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 14:26:47,359 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-10-11 14:26:47,359 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2024-10-11 14:26:47,359 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 28 [2024-10-11 14:26:47,359 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 182 places, 148 transitions, 2363 flow. Second operand has 17 states, 17 states have (on average 5.411764705882353) internal successors, (92), 17 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 14:26:47,359 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 14:26:47,359 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 28 [2024-10-11 14:26:47,359 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 14:26:47,924 INFO L124 PetriNetUnfolderBase]: 1838/3173 cut-off events. [2024-10-11 14:26:47,924 INFO L125 PetriNetUnfolderBase]: For 22968/22968 co-relation queries the response was YES. [2024-10-11 14:26:47,938 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17230 conditions, 3173 events. 1838/3173 cut-off events. For 22968/22968 co-relation queries the response was YES. Maximal size of possible extension queue 187. Compared 18583 event pairs, 896 based on Foata normal form. 21/3194 useless extension candidates. Maximal degree in co-relation 17151. Up to 2412 conditions per place. [2024-10-11 14:26:47,948 INFO L140 encePairwiseOnDemand]: 18/28 looper letters, 140 selfloop transitions, 55 changer transitions 0/196 dead transitions. [2024-10-11 14:26:47,949 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 193 places, 196 transitions, 3062 flow [2024-10-11 14:26:47,949 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-10-11 14:26:47,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-10-11 14:26:47,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 126 transitions. [2024-10-11 14:26:47,949 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.34615384615384615 [2024-10-11 14:26:47,949 INFO L175 Difference]: Start difference. First operand has 182 places, 148 transitions, 2363 flow. Second operand 13 states and 126 transitions. [2024-10-11 14:26:47,950 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 193 places, 196 transitions, 3062 flow [2024-10-11 14:26:48,020 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 186 places, 196 transitions, 2962 flow, removed 0 selfloop flow, removed 7 redundant places. [2024-10-11 14:26:48,023 INFO L231 Difference]: Finished difference. Result has 189 places, 157 transitions, 2552 flow [2024-10-11 14:26:48,023 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=2273, PETRI_DIFFERENCE_MINUEND_PLACES=174, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=148, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=100, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=2552, PETRI_PLACES=189, PETRI_TRANSITIONS=157} [2024-10-11 14:26:48,024 INFO L277 CegarLoopForPetriNet]: 26 programPoint places, 163 predicate places. [2024-10-11 14:26:48,024 INFO L471 AbstractCegarLoop]: Abstraction has has 189 places, 157 transitions, 2552 flow [2024-10-11 14:26:48,024 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 5.411764705882353) internal successors, (92), 17 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 14:26:48,024 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 14:26:48,024 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 14:26:48,036 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2024-10-11 14:26:48,224 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2024-10-11 14:26:48,224 INFO L396 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-11 14:26:48,225 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 14:26:48,225 INFO L85 PathProgramCache]: Analyzing trace with hash -529173733, now seen corresponding path program 18 times [2024-10-11 14:26:48,225 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 14:26:48,225 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [306316295] [2024-10-11 14:26:48,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 14:26:48,225 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 14:26:48,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 14:26:48,452 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-10-11 14:26:48,452 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 14:26:48,453 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [306316295] [2024-10-11 14:26:48,453 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [306316295] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-11 14:26:48,453 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [237904063] [2024-10-11 14:26:48,453 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-10-11 14:26:48,453 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 14:26:48,453 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 14:26:48,454 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-11 14:26:48,455 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2024-10-11 14:26:48,535 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2024-10-11 14:26:48,535 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-11 14:26:48,536 INFO L255 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 25 conjuncts are in the unsatisfiable core [2024-10-11 14:26:48,537 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 14:26:48,586 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-11 14:26:48,587 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 29 treesize of output 21 [2024-10-11 14:26:48,602 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-10-11 14:26:48,602 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-11 14:26:48,657 INFO L349 Elim1Store]: treesize reduction 28, result has 63.6 percent of original size [2024-10-11 14:26:48,657 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 40 treesize of output 56 [2024-10-11 14:26:48,677 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-10-11 14:26:48,677 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [237904063] provided 1 perfect and 1 imperfect interpolant sequences [2024-10-11 14:26:48,677 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-10-11 14:26:48,677 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [9, 9] total 17 [2024-10-11 14:26:48,678 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1409370016] [2024-10-11 14:26:48,678 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-11 14:26:48,678 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-10-11 14:26:48,678 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 14:26:48,678 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-10-11 14:26:48,678 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2024-10-11 14:26:48,678 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 28 [2024-10-11 14:26:48,679 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 189 places, 157 transitions, 2552 flow. Second operand has 7 states, 7 states have (on average 6.0) internal successors, (42), 7 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 14:26:48,679 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 14:26:48,679 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 28 [2024-10-11 14:26:48,679 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 14:26:49,086 INFO L124 PetriNetUnfolderBase]: 1817/3152 cut-off events. [2024-10-11 14:26:49,086 INFO L125 PetriNetUnfolderBase]: For 23125/23125 co-relation queries the response was YES. [2024-10-11 14:26:49,103 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17134 conditions, 3152 events. 1817/3152 cut-off events. For 23125/23125 co-relation queries the response was YES. Maximal size of possible extension queue 187. Compared 18559 event pairs, 866 based on Foata normal form. 21/3173 useless extension candidates. Maximal degree in co-relation 17051. Up to 2419 conditions per place. [2024-10-11 14:26:49,112 INFO L140 encePairwiseOnDemand]: 21/28 looper letters, 132 selfloop transitions, 47 changer transitions 2/182 dead transitions. [2024-10-11 14:26:49,112 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 195 places, 182 transitions, 3022 flow [2024-10-11 14:26:49,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-10-11 14:26:49,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-10-11 14:26:49,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 85 transitions. [2024-10-11 14:26:49,113 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4336734693877551 [2024-10-11 14:26:49,113 INFO L175 Difference]: Start difference. First operand has 189 places, 157 transitions, 2552 flow. Second operand 7 states and 85 transitions. [2024-10-11 14:26:49,113 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 195 places, 182 transitions, 3022 flow [2024-10-11 14:26:49,181 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 187 places, 182 transitions, 2946 flow, removed 16 selfloop flow, removed 8 redundant places. [2024-10-11 14:26:49,184 INFO L231 Difference]: Finished difference. Result has 187 places, 155 transitions, 2520 flow [2024-10-11 14:26:49,184 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=2461, PETRI_DIFFERENCE_MINUEND_PLACES=181, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=156, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=109, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2520, PETRI_PLACES=187, PETRI_TRANSITIONS=155} [2024-10-11 14:26:49,184 INFO L277 CegarLoopForPetriNet]: 26 programPoint places, 161 predicate places. [2024-10-11 14:26:49,184 INFO L471 AbstractCegarLoop]: Abstraction has has 187 places, 155 transitions, 2520 flow [2024-10-11 14:26:49,184 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 6.0) internal successors, (42), 7 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 14:26:49,184 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 14:26:49,184 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 14:26:49,197 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2024-10-11 14:26:49,385 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,28 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 14:26:49,385 INFO L396 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-11 14:26:49,385 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 14:26:49,385 INFO L85 PathProgramCache]: Analyzing trace with hash 494950991, now seen corresponding path program 19 times [2024-10-11 14:26:49,385 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 14:26:49,385 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [508151532] [2024-10-11 14:26:49,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 14:26:49,386 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 14:26:49,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 14:26:49,556 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-10-11 14:26:49,557 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 14:26:49,557 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [508151532] [2024-10-11 14:26:49,557 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [508151532] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-11 14:26:49,557 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-11 14:26:49,557 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-10-11 14:26:49,557 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1623163460] [2024-10-11 14:26:49,557 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-11 14:26:49,557 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-10-11 14:26:49,557 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 14:26:49,557 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-10-11 14:26:49,558 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-10-11 14:26:49,558 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 28 [2024-10-11 14:26:49,558 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 187 places, 155 transitions, 2520 flow. Second operand has 10 states, 10 states have (on average 5.1) internal successors, (51), 10 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 14:26:49,558 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 14:26:49,558 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 28 [2024-10-11 14:26:49,558 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 14:26:50,001 INFO L124 PetriNetUnfolderBase]: 1811/3142 cut-off events. [2024-10-11 14:26:50,001 INFO L125 PetriNetUnfolderBase]: For 23102/23102 co-relation queries the response was YES. [2024-10-11 14:26:50,018 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17110 conditions, 3142 events. 1811/3142 cut-off events. For 23102/23102 co-relation queries the response was YES. Maximal size of possible extension queue 187. Compared 18448 event pairs, 876 based on Foata normal form. 4/3145 useless extension candidates. Maximal degree in co-relation 17031. Up to 2412 conditions per place. [2024-10-11 14:26:50,027 INFO L140 encePairwiseOnDemand]: 19/28 looper letters, 119 selfloop transitions, 48 changer transitions 3/171 dead transitions. [2024-10-11 14:26:50,028 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 195 places, 171 transitions, 2898 flow [2024-10-11 14:26:50,028 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-10-11 14:26:50,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-10-11 14:26:50,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 82 transitions. [2024-10-11 14:26:50,028 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.3253968253968254 [2024-10-11 14:26:50,028 INFO L175 Difference]: Start difference. First operand has 187 places, 155 transitions, 2520 flow. Second operand 9 states and 82 transitions. [2024-10-11 14:26:50,028 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 195 places, 171 transitions, 2898 flow [2024-10-11 14:26:50,089 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 182 places, 171 transitions, 2784 flow, removed 0 selfloop flow, removed 13 redundant places. [2024-10-11 14:26:50,091 INFO L231 Difference]: Finished difference. Result has 182 places, 153 transitions, 2462 flow [2024-10-11 14:26:50,092 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=2378, PETRI_DIFFERENCE_MINUEND_PLACES=174, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=154, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=106, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2462, PETRI_PLACES=182, PETRI_TRANSITIONS=153} [2024-10-11 14:26:50,092 INFO L277 CegarLoopForPetriNet]: 26 programPoint places, 156 predicate places. [2024-10-11 14:26:50,092 INFO L471 AbstractCegarLoop]: Abstraction has has 182 places, 153 transitions, 2462 flow [2024-10-11 14:26:50,092 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 5.1) internal successors, (51), 10 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 14:26:50,092 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 14:26:50,092 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 14:26:50,092 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2024-10-11 14:26:50,092 INFO L396 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-11 14:26:50,092 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 14:26:50,093 INFO L85 PathProgramCache]: Analyzing trace with hash 2108517725, now seen corresponding path program 20 times [2024-10-11 14:26:50,093 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 14:26:50,093 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [978416441] [2024-10-11 14:26:50,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 14:26:50,093 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 14:26:50,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 14:26:50,254 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-10-11 14:26:50,254 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 14:26:50,254 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [978416441] [2024-10-11 14:26:50,254 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [978416441] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-11 14:26:50,254 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-11 14:26:50,254 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-10-11 14:26:50,254 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [12040869] [2024-10-11 14:26:50,254 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-11 14:26:50,254 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-10-11 14:26:50,254 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 14:26:50,255 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-10-11 14:26:50,255 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-10-11 14:26:50,255 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 28 [2024-10-11 14:26:50,255 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 182 places, 153 transitions, 2462 flow. Second operand has 10 states, 10 states have (on average 5.1) internal successors, (51), 10 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 14:26:50,255 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 14:26:50,255 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 28 [2024-10-11 14:26:50,255 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 14:26:50,630 INFO L124 PetriNetUnfolderBase]: 1766/3042 cut-off events. [2024-10-11 14:26:50,631 INFO L125 PetriNetUnfolderBase]: For 22323/22323 co-relation queries the response was YES. [2024-10-11 14:26:50,645 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16630 conditions, 3042 events. 1766/3042 cut-off events. For 22323/22323 co-relation queries the response was YES. Maximal size of possible extension queue 180. Compared 17578 event pairs, 890 based on Foata normal form. 4/3046 useless extension candidates. Maximal degree in co-relation 16559. Up to 2412 conditions per place. [2024-10-11 14:26:50,653 INFO L140 encePairwiseOnDemand]: 19/28 looper letters, 114 selfloop transitions, 45 changer transitions 6/166 dead transitions. [2024-10-11 14:26:50,654 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 189 places, 166 transitions, 2821 flow [2024-10-11 14:26:50,654 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-10-11 14:26:50,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-10-11 14:26:50,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 77 transitions. [2024-10-11 14:26:50,654 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.3055555555555556 [2024-10-11 14:26:50,654 INFO L175 Difference]: Start difference. First operand has 182 places, 153 transitions, 2462 flow. Second operand 9 states and 77 transitions. [2024-10-11 14:26:50,654 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 189 places, 166 transitions, 2821 flow [2024-10-11 14:26:50,715 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 181 places, 166 transitions, 2720 flow, removed 0 selfloop flow, removed 8 redundant places. [2024-10-11 14:26:50,717 INFO L231 Difference]: Finished difference. Result has 181 places, 150 transitions, 2396 flow [2024-10-11 14:26:50,717 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=2333, PETRI_DIFFERENCE_MINUEND_PLACES=173, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=152, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=107, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2396, PETRI_PLACES=181, PETRI_TRANSITIONS=150} [2024-10-11 14:26:50,717 INFO L277 CegarLoopForPetriNet]: 26 programPoint places, 155 predicate places. [2024-10-11 14:26:50,717 INFO L471 AbstractCegarLoop]: Abstraction has has 181 places, 150 transitions, 2396 flow [2024-10-11 14:26:50,718 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 5.1) internal successors, (51), 10 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 14:26:50,718 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 14:26:50,718 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 14:26:50,718 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2024-10-11 14:26:50,718 INFO L396 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-11 14:26:50,718 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 14:26:50,718 INFO L85 PathProgramCache]: Analyzing trace with hash -1258216708, now seen corresponding path program 1 times [2024-10-11 14:26:50,718 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 14:26:50,718 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [432697821] [2024-10-11 14:26:50,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 14:26:50,718 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 14:26:50,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 14:26:50,847 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-10-11 14:26:50,847 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 14:26:50,847 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [432697821] [2024-10-11 14:26:50,847 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [432697821] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-11 14:26:50,847 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1093797336] [2024-10-11 14:26:50,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 14:26:50,848 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 14:26:50,848 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 14:26:50,849 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-11 14:26:50,850 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2024-10-11 14:26:50,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 14:26:50,933 INFO L255 TraceCheckSpWp]: Trace formula consists of 196 conjuncts, 23 conjuncts are in the unsatisfiable core [2024-10-11 14:26:50,934 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 14:26:51,019 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-10-11 14:26:51,019 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-11 14:26:51,094 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-10-11 14:26:51,094 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1093797336] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-11 14:26:51,094 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-11 14:26:51,094 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 16 [2024-10-11 14:26:51,094 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [276123415] [2024-10-11 14:26:51,094 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-11 14:26:51,094 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-10-11 14:26:51,094 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 14:26:51,095 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-10-11 14:26:51,095 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=211, Unknown=0, NotChecked=0, Total=272 [2024-10-11 14:26:51,095 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 28 [2024-10-11 14:26:51,095 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 181 places, 150 transitions, 2396 flow. Second operand has 17 states, 17 states have (on average 5.411764705882353) internal successors, (92), 17 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 14:26:51,095 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 14:26:51,095 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 28 [2024-10-11 14:26:51,095 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 14:26:52,079 INFO L124 PetriNetUnfolderBase]: 5278/9067 cut-off events. [2024-10-11 14:26:52,080 INFO L125 PetriNetUnfolderBase]: For 65751/65751 co-relation queries the response was YES. [2024-10-11 14:26:52,250 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49526 conditions, 9067 events. 5278/9067 cut-off events. For 65751/65751 co-relation queries the response was YES. Maximal size of possible extension queue 497. Compared 63603 event pairs, 1863 based on Foata normal form. 6/9073 useless extension candidates. Maximal degree in co-relation 48239. Up to 2999 conditions per place. [2024-10-11 14:26:52,276 INFO L140 encePairwiseOnDemand]: 18/28 looper letters, 479 selfloop transitions, 23 changer transitions 1/504 dead transitions. [2024-10-11 14:26:52,276 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 188 places, 504 transitions, 8895 flow [2024-10-11 14:26:52,277 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-10-11 14:26:52,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2024-10-11 14:26:52,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 148 transitions. [2024-10-11 14:26:52,277 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.37755102040816324 [2024-10-11 14:26:52,277 INFO L175 Difference]: Start difference. First operand has 181 places, 150 transitions, 2396 flow. Second operand 14 states and 148 transitions. [2024-10-11 14:26:52,277 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 188 places, 504 transitions, 8895 flow [2024-10-11 14:26:52,690 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 180 places, 504 transitions, 8590 flow, removed 3 selfloop flow, removed 8 redundant places. [2024-10-11 14:26:52,694 INFO L231 Difference]: Finished difference. Result has 184 places, 171 transitions, 2598 flow [2024-10-11 14:26:52,694 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=2301, PETRI_DIFFERENCE_MINUEND_PLACES=167, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=150, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=135, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=2598, PETRI_PLACES=184, PETRI_TRANSITIONS=171} [2024-10-11 14:26:52,695 INFO L277 CegarLoopForPetriNet]: 26 programPoint places, 158 predicate places. [2024-10-11 14:26:52,695 INFO L471 AbstractCegarLoop]: Abstraction has has 184 places, 171 transitions, 2598 flow [2024-10-11 14:26:52,695 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 5.411764705882353) internal successors, (92), 17 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 14:26:52,695 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 14:26:52,695 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 14:26:52,715 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Ended with exit code 0 [2024-10-11 14:26:52,895 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63,29 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 14:26:52,896 INFO L396 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-11 14:26:52,896 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 14:26:52,896 INFO L85 PathProgramCache]: Analyzing trace with hash -1100053289, now seen corresponding path program 1 times [2024-10-11 14:26:52,896 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 14:26:52,896 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1900091255] [2024-10-11 14:26:52,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 14:26:52,896 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 14:26:52,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 14:26:52,946 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-10-11 14:26:52,946 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 14:26:52,946 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1900091255] [2024-10-11 14:26:52,946 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1900091255] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-11 14:26:52,946 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1637930693] [2024-10-11 14:26:52,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 14:26:52,946 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 14:26:52,946 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 14:26:52,947 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-11 14:26:52,948 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2024-10-11 14:26:53,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 14:26:53,026 INFO L255 TraceCheckSpWp]: Trace formula consists of 210 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-10-11 14:26:53,026 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 14:26:53,074 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-10-11 14:26:53,075 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-11 14:26:53,123 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-10-11 14:26:53,124 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1637930693] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-11 14:26:53,124 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-11 14:26:53,124 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 7] total 16 [2024-10-11 14:26:53,124 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1660587187] [2024-10-11 14:26:53,124 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-11 14:26:53,124 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-10-11 14:26:53,124 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 14:26:53,124 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-10-11 14:26:53,125 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=191, Unknown=0, NotChecked=0, Total=240 [2024-10-11 14:26:53,125 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 28 [2024-10-11 14:26:53,125 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 184 places, 171 transitions, 2598 flow. Second operand has 16 states, 16 states have (on average 6.0) internal successors, (96), 16 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) [2024-10-11 14:26:53,125 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 14:26:53,125 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 28 [2024-10-11 14:26:53,125 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 14:26:54,464 INFO L124 PetriNetUnfolderBase]: 5006/8827 cut-off events. [2024-10-11 14:26:54,464 INFO L125 PetriNetUnfolderBase]: For 73104/73104 co-relation queries the response was YES. [2024-10-11 14:26:54,512 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52518 conditions, 8827 events. 5006/8827 cut-off events. For 73104/73104 co-relation queries the response was YES. Maximal size of possible extension queue 526. Compared 63723 event pairs, 1572 based on Foata normal form. 324/9146 useless extension candidates. Maximal degree in co-relation 51431. Up to 3008 conditions per place. [2024-10-11 14:26:54,538 INFO L140 encePairwiseOnDemand]: 20/28 looper letters, 428 selfloop transitions, 120 changer transitions 3/552 dead transitions. [2024-10-11 14:26:54,538 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 200 places, 552 transitions, 9578 flow [2024-10-11 14:26:54,538 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2024-10-11 14:26:54,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2024-10-11 14:26:54,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 194 transitions. [2024-10-11 14:26:54,539 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.38492063492063494 [2024-10-11 14:26:54,539 INFO L175 Difference]: Start difference. First operand has 184 places, 171 transitions, 2598 flow. Second operand 18 states and 194 transitions. [2024-10-11 14:26:54,539 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 200 places, 552 transitions, 9578 flow [2024-10-11 14:26:55,305 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 197 places, 552 transitions, 9517 flow, removed 26 selfloop flow, removed 3 redundant places. [2024-10-11 14:26:55,310 INFO L231 Difference]: Finished difference. Result has 201 places, 273 transitions, 5378 flow [2024-10-11 14:26:55,310 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=2494, PETRI_DIFFERENCE_MINUEND_PLACES=180, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=166, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=49, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=116, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=5378, PETRI_PLACES=201, PETRI_TRANSITIONS=273} [2024-10-11 14:26:55,311 INFO L277 CegarLoopForPetriNet]: 26 programPoint places, 175 predicate places. [2024-10-11 14:26:55,311 INFO L471 AbstractCegarLoop]: Abstraction has has 201 places, 273 transitions, 5378 flow [2024-10-11 14:26:55,311 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 6.0) internal successors, (96), 16 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) [2024-10-11 14:26:55,311 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 14:26:55,311 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 14:26:55,323 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2024-10-11 14:26:55,511 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64,30 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 14:26:55,511 INFO L396 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-11 14:26:55,512 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 14:26:55,512 INFO L85 PathProgramCache]: Analyzing trace with hash -1099303210, now seen corresponding path program 2 times [2024-10-11 14:26:55,512 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 14:26:55,512 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [237835848] [2024-10-11 14:26:55,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 14:26:55,512 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 14:26:55,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 14:26:55,624 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-10-11 14:26:55,624 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 14:26:55,624 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [237835848] [2024-10-11 14:26:55,625 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [237835848] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-11 14:26:55,625 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [215637798] [2024-10-11 14:26:55,625 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-11 14:26:55,625 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 14:26:55,625 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 14:26:55,627 INFO L229 MonitoredProcess]: Starting monitored process 31 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-11 14:26:55,628 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2024-10-11 14:26:55,707 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2024-10-11 14:26:55,707 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-11 14:26:55,708 INFO L255 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-10-11 14:26:55,709 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 14:26:55,739 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-10-11 14:26:55,739 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-10-11 14:26:55,739 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [215637798] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-11 14:26:55,740 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-10-11 14:26:55,740 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [9] total 12 [2024-10-11 14:26:55,740 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [634069949] [2024-10-11 14:26:55,740 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-11 14:26:55,740 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-10-11 14:26:55,740 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 14:26:55,740 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-10-11 14:26:55,741 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=108, Unknown=0, NotChecked=0, Total=132 [2024-10-11 14:26:55,741 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 28 [2024-10-11 14:26:55,741 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 201 places, 273 transitions, 5378 flow. Second operand has 4 states, 4 states have (on average 8.5) internal successors, (34), 4 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 14:26:55,741 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 14:26:55,741 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 28 [2024-10-11 14:26:55,741 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 14:26:57,046 INFO L124 PetriNetUnfolderBase]: 5006/8797 cut-off events. [2024-10-11 14:26:57,046 INFO L125 PetriNetUnfolderBase]: For 87053/87053 co-relation queries the response was YES. [2024-10-11 14:26:57,099 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53764 conditions, 8797 events. 5006/8797 cut-off events. For 87053/87053 co-relation queries the response was YES. Maximal size of possible extension queue 543. Compared 63795 event pairs, 806 based on Foata normal form. 15/8811 useless extension candidates. Maximal degree in co-relation 52668. Up to 3553 conditions per place. [2024-10-11 14:26:57,128 INFO L140 encePairwiseOnDemand]: 22/28 looper letters, 319 selfloop transitions, 40 changer transitions 1/361 dead transitions. [2024-10-11 14:26:57,129 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 205 places, 361 transitions, 7524 flow [2024-10-11 14:26:57,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-10-11 14:26:57,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-10-11 14:26:57,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 71 transitions. [2024-10-11 14:26:57,129 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5071428571428571 [2024-10-11 14:26:57,130 INFO L175 Difference]: Start difference. First operand has 201 places, 273 transitions, 5378 flow. Second operand 5 states and 71 transitions. [2024-10-11 14:26:57,130 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 205 places, 361 transitions, 7524 flow [2024-10-11 14:26:57,949 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 199 places, 361 transitions, 7496 flow, removed 6 selfloop flow, removed 6 redundant places. [2024-10-11 14:26:57,953 INFO L231 Difference]: Finished difference. Result has 201 places, 281 transitions, 5635 flow [2024-10-11 14:26:57,954 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=5350, PETRI_DIFFERENCE_MINUEND_PLACES=195, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=273, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=236, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=5635, PETRI_PLACES=201, PETRI_TRANSITIONS=281} [2024-10-11 14:26:57,954 INFO L277 CegarLoopForPetriNet]: 26 programPoint places, 175 predicate places. [2024-10-11 14:26:57,954 INFO L471 AbstractCegarLoop]: Abstraction has has 201 places, 281 transitions, 5635 flow [2024-10-11 14:26:57,954 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 8.5) internal successors, (34), 4 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 14:26:57,954 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 14:26:57,954 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 14:26:57,966 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Ended with exit code 0 [2024-10-11 14:26:58,154 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65,31 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 14:26:58,155 INFO L396 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-11 14:26:58,155 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 14:26:58,155 INFO L85 PathProgramCache]: Analyzing trace with hash -1843293295, now seen corresponding path program 1 times [2024-10-11 14:26:58,155 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 14:26:58,155 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1285960275] [2024-10-11 14:26:58,155 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 14:26:58,155 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 14:26:58,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 14:26:58,207 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-10-11 14:26:58,207 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 14:26:58,207 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1285960275] [2024-10-11 14:26:58,207 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1285960275] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-11 14:26:58,207 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1265613374] [2024-10-11 14:26:58,207 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 14:26:58,208 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 14:26:58,208 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 14:26:58,209 INFO L229 MonitoredProcess]: Starting monitored process 32 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-11 14:26:58,209 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2024-10-11 14:26:58,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 14:26:58,286 INFO L255 TraceCheckSpWp]: Trace formula consists of 210 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-10-11 14:26:58,287 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 14:26:58,326 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-10-11 14:26:58,326 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-11 14:26:58,373 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-10-11 14:26:58,373 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1265613374] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-11 14:26:58,373 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-11 14:26:58,373 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 16 [2024-10-11 14:26:58,373 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1862059280] [2024-10-11 14:26:58,373 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-11 14:26:58,374 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-10-11 14:26:58,374 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 14:26:58,374 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-10-11 14:26:58,374 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=191, Unknown=0, NotChecked=0, Total=240 [2024-10-11 14:26:58,374 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 28 [2024-10-11 14:26:58,374 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 201 places, 281 transitions, 5635 flow. Second operand has 16 states, 16 states have (on average 5.6875) internal successors, (91), 16 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 14:26:58,374 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 14:26:58,374 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 28 [2024-10-11 14:26:58,374 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 14:26:59,226 INFO L124 PetriNetUnfolderBase]: 3070/5493 cut-off events. [2024-10-11 14:26:59,227 INFO L125 PetriNetUnfolderBase]: For 60752/60752 co-relation queries the response was YES. [2024-10-11 14:26:59,257 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35266 conditions, 5493 events. 3070/5493 cut-off events. For 60752/60752 co-relation queries the response was YES. Maximal size of possible extension queue 329. Compared 36792 event pairs, 1291 based on Foata normal form. 176/5669 useless extension candidates. Maximal degree in co-relation 34168. Up to 3002 conditions per place. [2024-10-11 14:26:59,270 INFO L140 encePairwiseOnDemand]: 20/28 looper letters, 149 selfloop transitions, 6 changer transitions 277/433 dead transitions. [2024-10-11 14:26:59,270 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 216 places, 433 transitions, 8178 flow [2024-10-11 14:26:59,270 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-10-11 14:26:59,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2024-10-11 14:26:59,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 185 transitions. [2024-10-11 14:26:59,271 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.38865546218487396 [2024-10-11 14:26:59,271 INFO L175 Difference]: Start difference. First operand has 201 places, 281 transitions, 5635 flow. Second operand 17 states and 185 transitions. [2024-10-11 14:26:59,271 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 216 places, 433 transitions, 8178 flow [2024-10-11 14:26:59,743 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 215 places, 433 transitions, 8147 flow, removed 10 selfloop flow, removed 1 redundant places. [2024-10-11 14:26:59,747 INFO L231 Difference]: Finished difference. Result has 224 places, 156 transitions, 2794 flow [2024-10-11 14:26:59,747 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=4656, PETRI_DIFFERENCE_MINUEND_PLACES=199, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=241, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=235, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=2794, PETRI_PLACES=224, PETRI_TRANSITIONS=156} [2024-10-11 14:26:59,748 INFO L277 CegarLoopForPetriNet]: 26 programPoint places, 198 predicate places. [2024-10-11 14:26:59,748 INFO L471 AbstractCegarLoop]: Abstraction has has 224 places, 156 transitions, 2794 flow [2024-10-11 14:26:59,748 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 5.6875) internal successors, (91), 16 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 14:26:59,748 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 14:26:59,748 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 14:26:59,760 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Ended with exit code 0 [2024-10-11 14:26:59,948 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable66 [2024-10-11 14:26:59,948 INFO L396 AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-11 14:26:59,949 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 14:26:59,949 INFO L85 PathProgramCache]: Analyzing trace with hash 1338808210, now seen corresponding path program 2 times [2024-10-11 14:26:59,949 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 14:26:59,949 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [522366434] [2024-10-11 14:26:59,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 14:26:59,949 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 14:26:59,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 14:27:00,146 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-10-11 14:27:00,147 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 14:27:00,147 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [522366434] [2024-10-11 14:27:00,147 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [522366434] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-11 14:27:00,147 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2013417443] [2024-10-11 14:27:00,147 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-11 14:27:00,147 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 14:27:00,147 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 14:27:00,148 INFO L229 MonitoredProcess]: Starting monitored process 33 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-11 14:27:00,149 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2024-10-11 14:27:00,236 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-11 14:27:00,236 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-11 14:27:00,237 INFO L255 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 11 conjuncts are in the unsatisfiable core [2024-10-11 14:27:00,238 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 14:27:00,322 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-10-11 14:27:00,322 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-11 14:27:00,432 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-10-11 14:27:00,433 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2013417443] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-11 14:27:00,433 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-11 14:27:00,433 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 23 [2024-10-11 14:27:00,433 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1604543731] [2024-10-11 14:27:00,433 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-11 14:27:00,433 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2024-10-11 14:27:00,433 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 14:27:00,434 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2024-10-11 14:27:00,434 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=455, Unknown=0, NotChecked=0, Total=552 [2024-10-11 14:27:00,434 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 28 [2024-10-11 14:27:00,434 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 224 places, 156 transitions, 2794 flow. Second operand has 24 states, 24 states have (on average 5.375) internal successors, (129), 24 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 14:27:00,434 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 14:27:00,434 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 28 [2024-10-11 14:27:00,434 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 14:27:01,138 INFO L124 PetriNetUnfolderBase]: 1925/3300 cut-off events. [2024-10-11 14:27:01,138 INFO L125 PetriNetUnfolderBase]: For 30733/30733 co-relation queries the response was YES. [2024-10-11 14:27:01,152 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19540 conditions, 3300 events. 1925/3300 cut-off events. For 30733/30733 co-relation queries the response was YES. Maximal size of possible extension queue 179. Compared 19167 event pairs, 439 based on Foata normal form. 76/3376 useless extension candidates. Maximal degree in co-relation 19442. Up to 1041 conditions per place. [2024-10-11 14:27:01,160 INFO L140 encePairwiseOnDemand]: 19/28 looper letters, 192 selfloop transitions, 44 changer transitions 0/237 dead transitions. [2024-10-11 14:27:01,160 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 207 places, 237 transitions, 4291 flow [2024-10-11 14:27:01,160 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-10-11 14:27:01,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-10-11 14:27:01,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 105 transitions. [2024-10-11 14:27:01,161 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.3125 [2024-10-11 14:27:01,161 INFO L175 Difference]: Start difference. First operand has 224 places, 156 transitions, 2794 flow. Second operand 12 states and 105 transitions. [2024-10-11 14:27:01,161 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 207 places, 237 transitions, 4291 flow [2024-10-11 14:27:01,233 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 188 places, 237 transitions, 3836 flow, removed 220 selfloop flow, removed 19 redundant places. [2024-10-11 14:27:01,236 INFO L231 Difference]: Finished difference. Result has 189 places, 157 transitions, 2546 flow [2024-10-11 14:27:01,236 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=2423, PETRI_DIFFERENCE_MINUEND_PLACES=177, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=156, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=113, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=2546, PETRI_PLACES=189, PETRI_TRANSITIONS=157} [2024-10-11 14:27:01,236 INFO L277 CegarLoopForPetriNet]: 26 programPoint places, 163 predicate places. [2024-10-11 14:27:01,237 INFO L471 AbstractCegarLoop]: Abstraction has has 189 places, 157 transitions, 2546 flow [2024-10-11 14:27:01,237 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 5.375) internal successors, (129), 24 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 14:27:01,237 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 14:27:01,237 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 14:27:01,248 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2024-10-11 14:27:01,437 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable67 [2024-10-11 14:27:01,437 INFO L396 AbstractCegarLoop]: === Iteration 69 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-11 14:27:01,438 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 14:27:01,438 INFO L85 PathProgramCache]: Analyzing trace with hash -1172528820, now seen corresponding path program 2 times [2024-10-11 14:27:01,438 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 14:27:01,438 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1330148586] [2024-10-11 14:27:01,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 14:27:01,438 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 14:27:01,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 14:27:01,552 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-10-11 14:27:01,552 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 14:27:01,552 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1330148586] [2024-10-11 14:27:01,552 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1330148586] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-11 14:27:01,552 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [290050358] [2024-10-11 14:27:01,553 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-11 14:27:01,553 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 14:27:01,553 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 14:27:01,554 INFO L229 MonitoredProcess]: Starting monitored process 34 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-11 14:27:01,555 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2024-10-11 14:27:01,646 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-11 14:27:01,647 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-11 14:27:01,648 INFO L255 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 11 conjuncts are in the unsatisfiable core [2024-10-11 14:27:01,649 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 14:27:01,742 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-10-11 14:27:01,742 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-11 14:27:01,807 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-10-11 14:27:01,807 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [290050358] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-11 14:27:01,807 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-11 14:27:01,808 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2024-10-11 14:27:01,808 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1871879008] [2024-10-11 14:27:01,808 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-11 14:27:01,808 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-10-11 14:27:01,808 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 14:27:01,808 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-10-11 14:27:01,809 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=258, Unknown=0, NotChecked=0, Total=342 [2024-10-11 14:27:01,809 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 28 [2024-10-11 14:27:01,809 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 189 places, 157 transitions, 2546 flow. Second operand has 19 states, 19 states have (on average 5.526315789473684) internal successors, (105), 19 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) [2024-10-11 14:27:01,809 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 14:27:01,809 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 28 [2024-10-11 14:27:01,809 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 14:27:02,490 INFO L124 PetriNetUnfolderBase]: 2122/3639 cut-off events. [2024-10-11 14:27:02,491 INFO L125 PetriNetUnfolderBase]: For 28600/28600 co-relation queries the response was YES. [2024-10-11 14:27:02,507 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21081 conditions, 3639 events. 2122/3639 cut-off events. For 28600/28600 co-relation queries the response was YES. Maximal size of possible extension queue 188. Compared 21067 event pairs, 150 based on Foata normal form. 87/3726 useless extension candidates. Maximal degree in co-relation 20996. Up to 929 conditions per place. [2024-10-11 14:27:02,516 INFO L140 encePairwiseOnDemand]: 17/28 looper letters, 159 selfloop transitions, 109 changer transitions 0/269 dead transitions. [2024-10-11 14:27:02,517 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 208 places, 269 transitions, 4309 flow [2024-10-11 14:27:02,517 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2024-10-11 14:27:02,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2024-10-11 14:27:02,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 172 transitions. [2024-10-11 14:27:02,517 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.30714285714285716 [2024-10-11 14:27:02,517 INFO L175 Difference]: Start difference. First operand has 189 places, 157 transitions, 2546 flow. Second operand 20 states and 172 transitions. [2024-10-11 14:27:02,517 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 208 places, 269 transitions, 4309 flow [2024-10-11 14:27:02,577 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 197 places, 269 transitions, 4070 flow, removed 13 selfloop flow, removed 11 redundant places. [2024-10-11 14:27:02,580 INFO L231 Difference]: Finished difference. Result has 200 places, 186 transitions, 3268 flow [2024-10-11 14:27:02,580 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=2404, PETRI_DIFFERENCE_MINUEND_PLACES=178, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=157, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=80, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=77, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=3268, PETRI_PLACES=200, PETRI_TRANSITIONS=186} [2024-10-11 14:27:02,580 INFO L277 CegarLoopForPetriNet]: 26 programPoint places, 174 predicate places. [2024-10-11 14:27:02,580 INFO L471 AbstractCegarLoop]: Abstraction has has 200 places, 186 transitions, 3268 flow [2024-10-11 14:27:02,581 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 5.526315789473684) internal successors, (105), 19 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) [2024-10-11 14:27:02,581 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 14:27:02,581 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 14:27:02,592 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2024-10-11 14:27:02,781 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68,34 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 14:27:02,781 INFO L396 AbstractCegarLoop]: === Iteration 70 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-11 14:27:02,781 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 14:27:02,781 INFO L85 PathProgramCache]: Analyzing trace with hash -708213165, now seen corresponding path program 1 times [2024-10-11 14:27:02,782 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 14:27:02,782 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [539296394] [2024-10-11 14:27:02,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 14:27:02,782 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 14:27:02,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 14:27:03,301 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 14:27:03,301 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 14:27:03,301 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [539296394] [2024-10-11 14:27:03,301 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [539296394] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-11 14:27:03,301 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [952185264] [2024-10-11 14:27:03,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 14:27:03,302 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 14:27:03,302 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 14:27:03,303 INFO L229 MonitoredProcess]: Starting monitored process 35 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-11 14:27:03,304 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2024-10-11 14:27:03,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 14:27:03,401 INFO L255 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 23 conjuncts are in the unsatisfiable core [2024-10-11 14:27:03,402 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 14:27:03,533 INFO L349 Elim1Store]: treesize reduction 3, result has 75.0 percent of original size [2024-10-11 14:27:03,533 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 51 treesize of output 24 [2024-10-11 14:27:03,556 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-10-11 14:27:03,557 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-11 14:27:03,770 INFO L349 Elim1Store]: treesize reduction 28, result has 61.6 percent of original size [2024-10-11 14:27:03,770 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 98 treesize of output 70 [2024-10-11 14:27:03,792 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-10-11 14:27:03,792 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [952185264] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-11 14:27:03,792 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-11 14:27:03,793 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 9, 9] total 27 [2024-10-11 14:27:03,793 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2077507826] [2024-10-11 14:27:03,793 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-11 14:27:03,793 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2024-10-11 14:27:03,793 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 14:27:03,793 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2024-10-11 14:27:03,793 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=622, Unknown=0, NotChecked=0, Total=702 [2024-10-11 14:27:03,794 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 28 [2024-10-11 14:27:03,794 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 200 places, 186 transitions, 3268 flow. Second operand has 27 states, 27 states have (on average 5.185185185185185) internal successors, (140), 27 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 14:27:03,794 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 14:27:03,794 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 28 [2024-10-11 14:27:03,794 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 14:27:04,787 INFO L124 PetriNetUnfolderBase]: 2147/3695 cut-off events. [2024-10-11 14:27:04,788 INFO L125 PetriNetUnfolderBase]: For 32603/32603 co-relation queries the response was YES. [2024-10-11 14:27:04,805 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22075 conditions, 3695 events. 2147/3695 cut-off events. For 32603/32603 co-relation queries the response was YES. Maximal size of possible extension queue 193. Compared 21934 event pairs, 632 based on Foata normal form. 6/3701 useless extension candidates. Maximal degree in co-relation 21991. Up to 1861 conditions per place. [2024-10-11 14:27:04,816 INFO L140 encePairwiseOnDemand]: 14/28 looper letters, 187 selfloop transitions, 80 changer transitions 21/289 dead transitions. [2024-10-11 14:27:04,816 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 215 places, 289 transitions, 5000 flow [2024-10-11 14:27:04,817 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-10-11 14:27:04,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2024-10-11 14:27:04,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 141 transitions. [2024-10-11 14:27:04,817 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.31473214285714285 [2024-10-11 14:27:04,817 INFO L175 Difference]: Start difference. First operand has 200 places, 186 transitions, 3268 flow. Second operand 16 states and 141 transitions. [2024-10-11 14:27:04,817 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 215 places, 289 transitions, 5000 flow [2024-10-11 14:27:04,885 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 196 places, 289 transitions, 4292 flow, removed 55 selfloop flow, removed 19 redundant places. [2024-10-11 14:27:04,888 INFO L231 Difference]: Finished difference. Result has 202 places, 191 transitions, 3006 flow [2024-10-11 14:27:04,888 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=2750, PETRI_DIFFERENCE_MINUEND_PLACES=181, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=186, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=75, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=106, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=3006, PETRI_PLACES=202, PETRI_TRANSITIONS=191} [2024-10-11 14:27:04,888 INFO L277 CegarLoopForPetriNet]: 26 programPoint places, 176 predicate places. [2024-10-11 14:27:04,888 INFO L471 AbstractCegarLoop]: Abstraction has has 202 places, 191 transitions, 3006 flow [2024-10-11 14:27:04,889 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 5.185185185185185) internal successors, (140), 27 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 14:27:04,889 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 14:27:04,889 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 14:27:04,901 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2024-10-11 14:27:05,089 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable69 [2024-10-11 14:27:05,089 INFO L396 AbstractCegarLoop]: === Iteration 71 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-11 14:27:05,090 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 14:27:05,090 INFO L85 PathProgramCache]: Analyzing trace with hash -1771224109, now seen corresponding path program 2 times [2024-10-11 14:27:05,090 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 14:27:05,090 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1247397913] [2024-10-11 14:27:05,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 14:27:05,090 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 14:27:05,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 14:27:05,404 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-10-11 14:27:05,404 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 14:27:05,404 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1247397913] [2024-10-11 14:27:05,404 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1247397913] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-11 14:27:05,404 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1500547906] [2024-10-11 14:27:05,405 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-11 14:27:05,405 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 14:27:05,405 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 14:27:05,406 INFO L229 MonitoredProcess]: Starting monitored process 36 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-11 14:27:05,408 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2024-10-11 14:27:05,508 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-11 14:27:05,508 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-11 14:27:05,509 INFO L255 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 33 conjuncts are in the unsatisfiable core [2024-10-11 14:27:05,510 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 14:27:05,637 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-10-11 14:27:05,638 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 39 treesize of output 19 [2024-10-11 14:27:05,659 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-10-11 14:27:05,660 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-11 14:27:05,801 INFO L349 Elim1Store]: treesize reduction 28, result has 63.6 percent of original size [2024-10-11 14:27:05,801 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 106 treesize of output 74 [2024-10-11 14:27:05,881 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-10-11 14:27:05,881 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1500547906] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-11 14:27:05,881 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-11 14:27:05,881 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 9] total 24 [2024-10-11 14:27:05,881 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [63727769] [2024-10-11 14:27:05,881 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-11 14:27:05,882 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2024-10-11 14:27:05,882 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 14:27:05,882 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2024-10-11 14:27:05,882 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=473, Unknown=0, NotChecked=0, Total=552 [2024-10-11 14:27:05,883 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 28 [2024-10-11 14:27:05,883 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 202 places, 191 transitions, 3006 flow. Second operand has 24 states, 24 states have (on average 5.541666666666667) internal successors, (133), 24 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 14:27:05,883 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 14:27:05,883 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 28 [2024-10-11 14:27:05,883 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 14:27:07,254 INFO L124 PetriNetUnfolderBase]: 2625/4560 cut-off events. [2024-10-11 14:27:07,255 INFO L125 PetriNetUnfolderBase]: For 28361/28361 co-relation queries the response was YES. [2024-10-11 14:27:07,289 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24188 conditions, 4560 events. 2625/4560 cut-off events. For 28361/28361 co-relation queries the response was YES. Maximal size of possible extension queue 212. Compared 28268 event pairs, 421 based on Foata normal form. 4/4564 useless extension candidates. Maximal degree in co-relation 24102. Up to 1889 conditions per place. [2024-10-11 14:27:07,310 INFO L140 encePairwiseOnDemand]: 15/28 looper letters, 208 selfloop transitions, 103 changer transitions 25/337 dead transitions. [2024-10-11 14:27:07,311 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 220 places, 337 transitions, 4778 flow [2024-10-11 14:27:07,311 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2024-10-11 14:27:07,311 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2024-10-11 14:27:07,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 230 transitions. [2024-10-11 14:27:07,312 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.35714285714285715 [2024-10-11 14:27:07,312 INFO L175 Difference]: Start difference. First operand has 202 places, 191 transitions, 3006 flow. Second operand 23 states and 230 transitions. [2024-10-11 14:27:07,312 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 220 places, 337 transitions, 4778 flow [2024-10-11 14:27:07,413 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 206 places, 337 transitions, 4508 flow, removed 38 selfloop flow, removed 14 redundant places. [2024-10-11 14:27:07,417 INFO L231 Difference]: Finished difference. Result has 219 places, 217 transitions, 3489 flow [2024-10-11 14:27:07,417 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=2800, PETRI_DIFFERENCE_MINUEND_PLACES=184, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=191, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=78, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=99, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=3489, PETRI_PLACES=219, PETRI_TRANSITIONS=217} [2024-10-11 14:27:07,418 INFO L277 CegarLoopForPetriNet]: 26 programPoint places, 193 predicate places. [2024-10-11 14:27:07,418 INFO L471 AbstractCegarLoop]: Abstraction has has 219 places, 217 transitions, 3489 flow [2024-10-11 14:27:07,418 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 5.541666666666667) internal successors, (133), 24 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 14:27:07,418 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 14:27:07,418 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 14:27:07,431 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Forceful destruction successful, exit code 0 [2024-10-11 14:27:07,619 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70,36 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 14:27:07,619 INFO L396 AbstractCegarLoop]: === Iteration 72 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-11 14:27:07,619 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 14:27:07,620 INFO L85 PathProgramCache]: Analyzing trace with hash -866563825, now seen corresponding path program 3 times [2024-10-11 14:27:07,620 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 14:27:07,620 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1054540166] [2024-10-11 14:27:07,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 14:27:07,620 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 14:27:07,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 14:27:08,021 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-10-11 14:27:08,022 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 14:27:08,022 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1054540166] [2024-10-11 14:27:08,022 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1054540166] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-11 14:27:08,022 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [469657007] [2024-10-11 14:27:08,022 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-10-11 14:27:08,022 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 14:27:08,022 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 14:27:08,024 INFO L229 MonitoredProcess]: Starting monitored process 37 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-11 14:27:08,025 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2024-10-11 14:27:08,114 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-10-11 14:27:08,114 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-11 14:27:08,115 INFO L255 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 33 conjuncts are in the unsatisfiable core [2024-10-11 14:27:08,116 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 14:27:08,270 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-10-11 14:27:08,270 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 39 treesize of output 19 [2024-10-11 14:27:08,285 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-10-11 14:27:08,285 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-11 14:27:08,472 INFO L349 Elim1Store]: treesize reduction 28, result has 61.6 percent of original size [2024-10-11 14:27:08,473 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 98 treesize of output 70 [2024-10-11 14:27:08,532 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-10-11 14:27:08,532 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [469657007] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-11 14:27:08,532 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-11 14:27:08,532 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 9] total 25 [2024-10-11 14:27:08,532 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2046908616] [2024-10-11 14:27:08,532 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-11 14:27:08,533 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2024-10-11 14:27:08,533 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 14:27:08,533 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2024-10-11 14:27:08,533 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=522, Unknown=0, NotChecked=0, Total=600 [2024-10-11 14:27:08,533 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 28 [2024-10-11 14:27:08,533 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 219 places, 217 transitions, 3489 flow. Second operand has 25 states, 25 states have (on average 5.52) internal successors, (138), 25 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 14:27:08,533 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 14:27:08,533 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 28 [2024-10-11 14:27:08,533 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 14:27:09,656 INFO L124 PetriNetUnfolderBase]: 2605/4517 cut-off events. [2024-10-11 14:27:09,657 INFO L125 PetriNetUnfolderBase]: For 35117/35117 co-relation queries the response was YES. [2024-10-11 14:27:09,689 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25078 conditions, 4517 events. 2605/4517 cut-off events. For 35117/35117 co-relation queries the response was YES. Maximal size of possible extension queue 214. Compared 28033 event pairs, 533 based on Foata normal form. 1/4518 useless extension candidates. Maximal degree in co-relation 24983. Up to 2609 conditions per place. [2024-10-11 14:27:09,705 INFO L140 encePairwiseOnDemand]: 15/28 looper letters, 210 selfloop transitions, 94 changer transitions 8/313 dead transitions. [2024-10-11 14:27:09,705 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 231 places, 313 transitions, 4991 flow [2024-10-11 14:27:09,705 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-10-11 14:27:09,705 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2024-10-11 14:27:09,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 154 transitions. [2024-10-11 14:27:09,706 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.3235294117647059 [2024-10-11 14:27:09,706 INFO L175 Difference]: Start difference. First operand has 219 places, 217 transitions, 3489 flow. Second operand 17 states and 154 transitions. [2024-10-11 14:27:09,706 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 231 places, 313 transitions, 4991 flow [2024-10-11 14:27:09,825 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 218 places, 313 transitions, 4787 flow, removed 33 selfloop flow, removed 13 redundant places. [2024-10-11 14:27:09,828 INFO L231 Difference]: Finished difference. Result has 220 places, 221 transitions, 3557 flow [2024-10-11 14:27:09,829 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=3307, PETRI_DIFFERENCE_MINUEND_PLACES=202, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=217, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=90, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=126, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=3557, PETRI_PLACES=220, PETRI_TRANSITIONS=221} [2024-10-11 14:27:09,829 INFO L277 CegarLoopForPetriNet]: 26 programPoint places, 194 predicate places. [2024-10-11 14:27:09,829 INFO L471 AbstractCegarLoop]: Abstraction has has 220 places, 221 transitions, 3557 flow [2024-10-11 14:27:09,829 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 5.52) internal successors, (138), 25 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 14:27:09,829 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 14:27:09,829 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 14:27:09,842 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Forceful destruction successful, exit code 0 [2024-10-11 14:27:10,030 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71,37 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 14:27:10,030 INFO L396 AbstractCegarLoop]: === Iteration 73 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-11 14:27:10,030 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 14:27:10,030 INFO L85 PathProgramCache]: Analyzing trace with hash 1899259603, now seen corresponding path program 4 times [2024-10-11 14:27:10,030 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 14:27:10,031 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [58828492] [2024-10-11 14:27:10,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 14:27:10,031 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 14:27:10,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 14:27:10,452 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-11 14:27:10,452 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 14:27:10,452 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [58828492] [2024-10-11 14:27:10,452 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [58828492] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-11 14:27:10,452 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [589981579] [2024-10-11 14:27:10,452 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-10-11 14:27:10,452 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 14:27:10,452 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 14:27:10,453 INFO L229 MonitoredProcess]: Starting monitored process 38 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-11 14:27:10,454 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2024-10-11 14:27:10,550 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-10-11 14:27:10,550 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-11 14:27:10,551 INFO L255 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 39 conjuncts are in the unsatisfiable core [2024-10-11 14:27:10,552 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 14:27:10,714 INFO L349 Elim1Store]: treesize reduction 3, result has 75.0 percent of original size [2024-10-11 14:27:10,714 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 45 treesize of output 24 [2024-10-11 14:27:10,731 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-10-11 14:27:10,731 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-11 14:27:10,872 INFO L349 Elim1Store]: treesize reduction 28, result has 63.6 percent of original size [2024-10-11 14:27:10,873 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 106 treesize of output 74 [2024-10-11 14:27:10,979 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-10-11 14:27:10,979 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [589981579] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-11 14:27:10,979 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-11 14:27:10,979 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 9] total 32 [2024-10-11 14:27:10,979 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [389594837] [2024-10-11 14:27:10,979 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-11 14:27:10,979 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2024-10-11 14:27:10,980 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 14:27:10,980 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2024-10-11 14:27:10,980 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=875, Unknown=0, NotChecked=0, Total=992 [2024-10-11 14:27:10,980 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 28 [2024-10-11 14:27:10,980 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 220 places, 221 transitions, 3557 flow. Second operand has 32 states, 32 states have (on average 5.375) internal successors, (172), 32 states have internal predecessors, (172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 14:27:10,980 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 14:27:10,981 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 28 [2024-10-11 14:27:10,981 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 14:27:12,630 INFO L124 PetriNetUnfolderBase]: 2645/4601 cut-off events. [2024-10-11 14:27:12,630 INFO L125 PetriNetUnfolderBase]: For 34470/34470 co-relation queries the response was YES. [2024-10-11 14:27:12,662 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25436 conditions, 4601 events. 2645/4601 cut-off events. For 34470/34470 co-relation queries the response was YES. Maximal size of possible extension queue 216. Compared 28635 event pairs, 378 based on Foata normal form. 2/4603 useless extension candidates. Maximal degree in co-relation 25343. Up to 1894 conditions per place. [2024-10-11 14:27:12,678 INFO L140 encePairwiseOnDemand]: 15/28 looper letters, 225 selfloop transitions, 118 changer transitions 12/356 dead transitions. [2024-10-11 14:27:12,678 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 243 places, 356 transitions, 5173 flow [2024-10-11 14:27:12,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2024-10-11 14:27:12,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2024-10-11 14:27:12,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 246 transitions. [2024-10-11 14:27:12,679 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.3514285714285714 [2024-10-11 14:27:12,679 INFO L175 Difference]: Start difference. First operand has 220 places, 221 transitions, 3557 flow. Second operand 25 states and 246 transitions. [2024-10-11 14:27:12,679 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 243 places, 356 transitions, 5173 flow [2024-10-11 14:27:12,806 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 232 places, 356 transitions, 5025 flow, removed 12 selfloop flow, removed 11 redundant places. [2024-10-11 14:27:12,810 INFO L231 Difference]: Finished difference. Result has 241 places, 235 transitions, 3878 flow [2024-10-11 14:27:12,810 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=3430, PETRI_DIFFERENCE_MINUEND_PLACES=208, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=221, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=105, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=112, PETRI_DIFFERENCE_SUBTRAHEND_STATES=25, PETRI_FLOW=3878, PETRI_PLACES=241, PETRI_TRANSITIONS=235} [2024-10-11 14:27:12,810 INFO L277 CegarLoopForPetriNet]: 26 programPoint places, 215 predicate places. [2024-10-11 14:27:12,811 INFO L471 AbstractCegarLoop]: Abstraction has has 241 places, 235 transitions, 3878 flow [2024-10-11 14:27:12,811 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 5.375) internal successors, (172), 32 states have internal predecessors, (172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 14:27:12,811 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 14:27:12,811 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 14:27:12,824 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Ended with exit code 0 [2024-10-11 14:27:13,011 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable72 [2024-10-11 14:27:13,011 INFO L396 AbstractCegarLoop]: === Iteration 74 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-11 14:27:13,012 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 14:27:13,012 INFO L85 PathProgramCache]: Analyzing trace with hash 1111156691, now seen corresponding path program 5 times [2024-10-11 14:27:13,012 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 14:27:13,012 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1341377699] [2024-10-11 14:27:13,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 14:27:13,012 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 14:27:13,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 14:27:13,342 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-10-11 14:27:13,342 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 14:27:13,342 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1341377699] [2024-10-11 14:27:13,342 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1341377699] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-11 14:27:13,342 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1888711363] [2024-10-11 14:27:13,342 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-10-11 14:27:13,342 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 14:27:13,342 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 14:27:13,343 INFO L229 MonitoredProcess]: Starting monitored process 39 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-11 14:27:13,344 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2024-10-11 14:27:13,438 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2024-10-11 14:27:13,438 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-11 14:27:13,439 INFO L255 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 25 conjuncts are in the unsatisfiable core [2024-10-11 14:27:13,440 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 14:27:13,540 INFO L349 Elim1Store]: treesize reduction 3, result has 75.0 percent of original size [2024-10-11 14:27:13,540 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 51 treesize of output 24 [2024-10-11 14:27:13,558 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-10-11 14:27:13,559 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-11 14:27:13,716 INFO L349 Elim1Store]: treesize reduction 30, result has 63.9 percent of original size [2024-10-11 14:27:13,716 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 110 treesize of output 78 [2024-10-11 14:27:13,773 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-10-11 14:27:13,774 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1888711363] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-11 14:27:13,774 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-11 14:27:13,774 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 9, 9] total 26 [2024-10-11 14:27:13,774 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2033930375] [2024-10-11 14:27:13,774 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-11 14:27:13,774 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2024-10-11 14:27:13,774 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 14:27:13,774 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2024-10-11 14:27:13,775 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=569, Unknown=0, NotChecked=0, Total=650 [2024-10-11 14:27:13,775 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 28 [2024-10-11 14:27:13,775 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 241 places, 235 transitions, 3878 flow. Second operand has 26 states, 26 states have (on average 5.384615384615385) internal successors, (140), 26 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 14:27:13,775 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 14:27:13,775 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 28 [2024-10-11 14:27:13,775 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 14:27:15,574 INFO L124 PetriNetUnfolderBase]: 3028/5314 cut-off events. [2024-10-11 14:27:15,574 INFO L125 PetriNetUnfolderBase]: For 41402/41402 co-relation queries the response was YES. [2024-10-11 14:27:15,622 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29723 conditions, 5314 events. 3028/5314 cut-off events. For 41402/41402 co-relation queries the response was YES. Maximal size of possible extension queue 242. Compared 34205 event pairs, 727 based on Foata normal form. 4/5318 useless extension candidates. Maximal degree in co-relation 29622. Up to 3907 conditions per place. [2024-10-11 14:27:15,645 INFO L140 encePairwiseOnDemand]: 15/28 looper letters, 248 selfloop transitions, 100 changer transitions 19/368 dead transitions. [2024-10-11 14:27:15,645 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 261 places, 368 transitions, 5772 flow [2024-10-11 14:27:15,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2024-10-11 14:27:15,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2024-10-11 14:27:15,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 219 transitions. [2024-10-11 14:27:15,647 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.34006211180124224 [2024-10-11 14:27:15,647 INFO L175 Difference]: Start difference. First operand has 241 places, 235 transitions, 3878 flow. Second operand 23 states and 219 transitions. [2024-10-11 14:27:15,647 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 261 places, 368 transitions, 5772 flow [2024-10-11 14:27:15,815 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 244 places, 368 transitions, 5486 flow, removed 25 selfloop flow, removed 17 redundant places. [2024-10-11 14:27:15,820 INFO L231 Difference]: Finished difference. Result has 254 places, 267 transitions, 4379 flow [2024-10-11 14:27:15,820 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=3640, PETRI_DIFFERENCE_MINUEND_PLACES=222, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=235, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=74, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=157, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=4379, PETRI_PLACES=254, PETRI_TRANSITIONS=267} [2024-10-11 14:27:15,821 INFO L277 CegarLoopForPetriNet]: 26 programPoint places, 228 predicate places. [2024-10-11 14:27:15,821 INFO L471 AbstractCegarLoop]: Abstraction has has 254 places, 267 transitions, 4379 flow [2024-10-11 14:27:15,821 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 5.384615384615385) internal successors, (140), 26 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 14:27:15,821 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 14:27:15,821 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 14:27:15,834 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Ended with exit code 0 [2024-10-11 14:27:16,022 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73,39 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 14:27:16,022 INFO L396 AbstractCegarLoop]: === Iteration 75 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-11 14:27:16,022 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 14:27:16,022 INFO L85 PathProgramCache]: Analyzing trace with hash 617373233, now seen corresponding path program 6 times [2024-10-11 14:27:16,022 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 14:27:16,022 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [563049923] [2024-10-11 14:27:16,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 14:27:16,023 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 14:27:16,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 14:27:16,519 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-10-11 14:27:16,519 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 14:27:16,520 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [563049923] [2024-10-11 14:27:16,520 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [563049923] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-11 14:27:16,520 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [785347719] [2024-10-11 14:27:16,520 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-10-11 14:27:16,520 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 14:27:16,520 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 14:27:16,522 INFO L229 MonitoredProcess]: Starting monitored process 40 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-11 14:27:16,523 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2024-10-11 14:27:16,636 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2024-10-11 14:27:16,637 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-11 14:27:16,638 INFO L255 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 37 conjuncts are in the unsatisfiable core [2024-10-11 14:27:16,640 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 14:27:16,841 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-10-11 14:27:16,841 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 39 treesize of output 19 [2024-10-11 14:27:16,866 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-10-11 14:27:16,867 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-11 14:27:17,030 INFO L349 Elim1Store]: treesize reduction 30, result has 63.9 percent of original size [2024-10-11 14:27:17,031 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 110 treesize of output 78 [2024-10-11 14:27:17,111 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-10-11 14:27:17,111 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [785347719] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-11 14:27:17,111 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-11 14:27:17,111 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 9] total 24 [2024-10-11 14:27:17,111 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [492207804] [2024-10-11 14:27:17,111 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-11 14:27:17,112 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2024-10-11 14:27:17,112 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 14:27:17,112 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2024-10-11 14:27:17,112 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=481, Unknown=0, NotChecked=0, Total=552 [2024-10-11 14:27:17,112 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 28 [2024-10-11 14:27:17,113 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 254 places, 267 transitions, 4379 flow. Second operand has 24 states, 24 states have (on average 5.416666666666667) internal successors, (130), 24 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 14:27:17,113 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 14:27:17,113 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 28 [2024-10-11 14:27:17,113 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 14:27:19,057 INFO L124 PetriNetUnfolderBase]: 3344/5861 cut-off events. [2024-10-11 14:27:19,057 INFO L125 PetriNetUnfolderBase]: For 48480/48480 co-relation queries the response was YES. [2024-10-11 14:27:19,128 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33167 conditions, 5861 events. 3344/5861 cut-off events. For 48480/48480 co-relation queries the response was YES. Maximal size of possible extension queue 267. Compared 38387 event pairs, 1503 based on Foata normal form. 13/5874 useless extension candidates. Maximal degree in co-relation 33058. Up to 4156 conditions per place. [2024-10-11 14:27:19,156 INFO L140 encePairwiseOnDemand]: 14/28 looper letters, 243 selfloop transitions, 127 changer transitions 30/401 dead transitions. [2024-10-11 14:27:19,156 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 273 places, 401 transitions, 6321 flow [2024-10-11 14:27:19,156 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2024-10-11 14:27:19,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2024-10-11 14:27:19,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 215 transitions. [2024-10-11 14:27:19,157 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.3338509316770186 [2024-10-11 14:27:19,157 INFO L175 Difference]: Start difference. First operand has 254 places, 267 transitions, 4379 flow. Second operand 23 states and 215 transitions. [2024-10-11 14:27:19,157 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 273 places, 401 transitions, 6321 flow [2024-10-11 14:27:19,387 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 263 places, 401 transitions, 6162 flow, removed 66 selfloop flow, removed 10 redundant places. [2024-10-11 14:27:19,393 INFO L231 Difference]: Finished difference. Result has 273 places, 298 transitions, 5014 flow [2024-10-11 14:27:19,393 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=4254, PETRI_DIFFERENCE_MINUEND_PLACES=241, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=267, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=100, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=147, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=5014, PETRI_PLACES=273, PETRI_TRANSITIONS=298} [2024-10-11 14:27:19,394 INFO L277 CegarLoopForPetriNet]: 26 programPoint places, 247 predicate places. [2024-10-11 14:27:19,394 INFO L471 AbstractCegarLoop]: Abstraction has has 273 places, 298 transitions, 5014 flow [2024-10-11 14:27:19,394 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 5.416666666666667) internal successors, (130), 24 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 14:27:19,394 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 14:27:19,394 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 14:27:19,408 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Forceful destruction successful, exit code 0 [2024-10-11 14:27:19,598 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74,40 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 14:27:19,599 INFO L396 AbstractCegarLoop]: === Iteration 76 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-11 14:27:19,599 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 14:27:19,599 INFO L85 PathProgramCache]: Analyzing trace with hash -9426755, now seen corresponding path program 7 times [2024-10-11 14:27:19,600 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 14:27:19,600 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [648795044] [2024-10-11 14:27:19,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 14:27:19,600 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 14:27:19,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 14:27:20,008 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-10-11 14:27:20,009 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 14:27:20,009 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [648795044] [2024-10-11 14:27:20,009 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [648795044] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-11 14:27:20,009 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1942] [2024-10-11 14:27:20,009 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-10-11 14:27:20,009 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 14:27:20,009 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 14:27:20,011 INFO L229 MonitoredProcess]: Starting monitored process 41 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-11 14:27:20,012 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2024-10-11 14:27:20,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 14:27:20,106 INFO L255 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 23 conjuncts are in the unsatisfiable core [2024-10-11 14:27:20,107 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 14:27:20,200 INFO L349 Elim1Store]: treesize reduction 3, result has 75.0 percent of original size [2024-10-11 14:27:20,201 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 51 treesize of output 24 [2024-10-11 14:27:20,220 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-10-11 14:27:20,221 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-11 14:27:20,377 INFO L349 Elim1Store]: treesize reduction 28, result has 63.6 percent of original size [2024-10-11 14:27:20,378 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 106 treesize of output 74 [2024-10-11 14:27:20,444 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-10-11 14:27:20,444 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1942] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-11 14:27:20,445 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-11 14:27:20,445 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 9, 8] total 25 [2024-10-11 14:27:20,445 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1576392532] [2024-10-11 14:27:20,445 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-11 14:27:20,445 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2024-10-11 14:27:20,445 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 14:27:20,446 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2024-10-11 14:27:20,446 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=523, Unknown=0, NotChecked=0, Total=600 [2024-10-11 14:27:20,446 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 28 [2024-10-11 14:27:20,446 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 273 places, 298 transitions, 5014 flow. Second operand has 25 states, 25 states have (on average 5.52) internal successors, (138), 25 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 14:27:20,446 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 14:27:20,446 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 28 [2024-10-11 14:27:20,446 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 14:27:21,989 INFO L124 PetriNetUnfolderBase]: 3255/5680 cut-off events. [2024-10-11 14:27:21,990 INFO L125 PetriNetUnfolderBase]: For 50301/50301 co-relation queries the response was YES. [2024-10-11 14:27:22,026 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32722 conditions, 5680 events. 3255/5680 cut-off events. For 50301/50301 co-relation queries the response was YES. Maximal size of possible extension queue 265. Compared 36678 event pairs, 872 based on Foata normal form. 2/5682 useless extension candidates. Maximal degree in co-relation 32606. Up to 4353 conditions per place. [2024-10-11 14:27:22,043 INFO L140 encePairwiseOnDemand]: 15/28 looper letters, 263 selfloop transitions, 103 changer transitions 12/379 dead transitions. [2024-10-11 14:27:22,044 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 288 places, 379 transitions, 6339 flow [2024-10-11 14:27:22,044 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2024-10-11 14:27:22,044 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2024-10-11 14:27:22,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 198 transitions. [2024-10-11 14:27:22,044 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.336734693877551 [2024-10-11 14:27:22,044 INFO L175 Difference]: Start difference. First operand has 273 places, 298 transitions, 5014 flow. Second operand 21 states and 198 transitions. [2024-10-11 14:27:22,045 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 288 places, 379 transitions, 6339 flow [2024-10-11 14:27:22,223 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 273 places, 379 transitions, 6089 flow, removed 31 selfloop flow, removed 15 redundant places. [2024-10-11 14:27:22,228 INFO L231 Difference]: Finished difference. Result has 279 places, 305 transitions, 5120 flow [2024-10-11 14:27:22,228 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=4778, PETRI_DIFFERENCE_MINUEND_PLACES=253, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=298, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=95, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=199, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=5120, PETRI_PLACES=279, PETRI_TRANSITIONS=305} [2024-10-11 14:27:22,228 INFO L277 CegarLoopForPetriNet]: 26 programPoint places, 253 predicate places. [2024-10-11 14:27:22,228 INFO L471 AbstractCegarLoop]: Abstraction has has 279 places, 305 transitions, 5120 flow [2024-10-11 14:27:22,229 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 5.52) internal successors, (138), 25 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 14:27:22,229 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 14:27:22,229 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 14:27:22,241 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Forceful destruction successful, exit code 0 [2024-10-11 14:27:22,429 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable75 [2024-10-11 14:27:22,429 INFO L396 AbstractCegarLoop]: === Iteration 77 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-11 14:27:22,429 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 14:27:22,430 INFO L85 PathProgramCache]: Analyzing trace with hash 1414717791, now seen corresponding path program 8 times [2024-10-11 14:27:22,430 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 14:27:22,430 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1537293442] [2024-10-11 14:27:22,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 14:27:22,430 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 14:27:22,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 14:27:22,790 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-10-11 14:27:22,790 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 14:27:22,790 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1537293442] [2024-10-11 14:27:22,790 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1537293442] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-11 14:27:22,790 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [962368633] [2024-10-11 14:27:22,790 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-11 14:27:22,790 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 14:27:22,790 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 14:27:22,792 INFO L229 MonitoredProcess]: Starting monitored process 42 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-11 14:27:22,793 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2024-10-11 14:27:22,892 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-11 14:27:22,892 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-11 14:27:22,893 INFO L255 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 37 conjuncts are in the unsatisfiable core [2024-10-11 14:27:22,894 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 14:27:23,004 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-10-11 14:27:23,004 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 39 treesize of output 19 [2024-10-11 14:27:23,024 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-10-11 14:27:23,024 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-11 14:27:23,137 INFO L349 Elim1Store]: treesize reduction 28, result has 63.6 percent of original size [2024-10-11 14:27:23,137 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 106 treesize of output 74 [2024-10-11 14:27:23,191 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-10-11 14:27:23,191 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [962368633] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-11 14:27:23,191 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-11 14:27:23,191 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 8] total 23 [2024-10-11 14:27:23,191 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1637564177] [2024-10-11 14:27:23,191 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-11 14:27:23,192 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2024-10-11 14:27:23,192 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 14:27:23,192 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2024-10-11 14:27:23,192 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=428, Unknown=0, NotChecked=0, Total=506 [2024-10-11 14:27:23,192 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 28 [2024-10-11 14:27:23,192 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 279 places, 305 transitions, 5120 flow. Second operand has 23 states, 23 states have (on average 5.434782608695652) internal successors, (125), 23 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 14:27:23,192 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 14:27:23,192 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 28 [2024-10-11 14:27:23,193 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 14:27:24,812 INFO L124 PetriNetUnfolderBase]: 3743/6570 cut-off events. [2024-10-11 14:27:24,812 INFO L125 PetriNetUnfolderBase]: For 58112/58112 co-relation queries the response was YES. [2024-10-11 14:27:24,883 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37334 conditions, 6570 events. 3743/6570 cut-off events. For 58112/58112 co-relation queries the response was YES. Maximal size of possible extension queue 313. Compared 44059 event pairs, 1883 based on Foata normal form. 2/6572 useless extension candidates. Maximal degree in co-relation 37218. Up to 5024 conditions per place. [2024-10-11 14:27:24,909 INFO L140 encePairwiseOnDemand]: 15/28 looper letters, 336 selfloop transitions, 90 changer transitions 12/439 dead transitions. [2024-10-11 14:27:24,909 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 299 places, 439 transitions, 7150 flow [2024-10-11 14:27:24,910 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2024-10-11 14:27:24,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2024-10-11 14:27:24,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 229 transitions. [2024-10-11 14:27:24,910 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.3555900621118012 [2024-10-11 14:27:24,910 INFO L175 Difference]: Start difference. First operand has 279 places, 305 transitions, 5120 flow. Second operand 23 states and 229 transitions. [2024-10-11 14:27:24,910 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 299 places, 439 transitions, 7150 flow [2024-10-11 14:27:25,163 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 285 places, 439 transitions, 6912 flow, removed 35 selfloop flow, removed 14 redundant places. [2024-10-11 14:27:25,169 INFO L231 Difference]: Finished difference. Result has 295 places, 336 transitions, 5613 flow [2024-10-11 14:27:25,169 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=4910, PETRI_DIFFERENCE_MINUEND_PLACES=263, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=305, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=64, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=233, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=5613, PETRI_PLACES=295, PETRI_TRANSITIONS=336} [2024-10-11 14:27:25,170 INFO L277 CegarLoopForPetriNet]: 26 programPoint places, 269 predicate places. [2024-10-11 14:27:25,170 INFO L471 AbstractCegarLoop]: Abstraction has has 295 places, 336 transitions, 5613 flow [2024-10-11 14:27:25,170 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 5.434782608695652) internal successors, (125), 23 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 14:27:25,170 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 14:27:25,170 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 14:27:25,183 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Forceful destruction successful, exit code 0 [2024-10-11 14:27:25,370 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76,42 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 14:27:25,371 INFO L396 AbstractCegarLoop]: === Iteration 78 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-11 14:27:25,371 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 14:27:25,372 INFO L85 PathProgramCache]: Analyzing trace with hash 86020371, now seen corresponding path program 9 times [2024-10-11 14:27:25,372 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 14:27:25,372 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1231806851] [2024-10-11 14:27:25,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 14:27:25,372 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 14:27:25,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 14:27:25,715 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-10-11 14:27:25,715 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 14:27:25,715 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1231806851] [2024-10-11 14:27:25,715 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1231806851] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-11 14:27:25,715 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1589755238] [2024-10-11 14:27:25,715 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-10-11 14:27:25,715 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 14:27:25,715 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 14:27:25,716 INFO L229 MonitoredProcess]: Starting monitored process 43 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-11 14:27:25,717 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2024-10-11 14:27:25,816 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-10-11 14:27:25,816 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-11 14:27:25,818 INFO L255 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 33 conjuncts are in the unsatisfiable core [2024-10-11 14:27:25,819 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 14:27:25,936 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-10-11 14:27:25,937 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 39 treesize of output 19 [2024-10-11 14:27:25,962 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-10-11 14:27:25,962 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-11 14:27:26,063 INFO L349 Elim1Store]: treesize reduction 28, result has 63.6 percent of original size [2024-10-11 14:27:26,064 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 106 treesize of output 74 [2024-10-11 14:27:26,123 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-10-11 14:27:26,124 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1589755238] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-11 14:27:26,124 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-11 14:27:26,124 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11, 8] total 23 [2024-10-11 14:27:26,124 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [402891669] [2024-10-11 14:27:26,124 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-11 14:27:26,124 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2024-10-11 14:27:26,124 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 14:27:26,125 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2024-10-11 14:27:26,125 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=434, Unknown=0, NotChecked=0, Total=506 [2024-10-11 14:27:26,125 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 28 [2024-10-11 14:27:26,125 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 295 places, 336 transitions, 5613 flow. Second operand has 23 states, 23 states have (on average 5.391304347826087) internal successors, (124), 23 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 14:27:26,125 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 14:27:26,125 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 28 [2024-10-11 14:27:26,125 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand