./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/weaver/popl20-channel-sum.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version c7c6ca5d Calling Ultimate with: /root/.sdkman/candidates/java/11.0.12-open/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/weaver/popl20-channel-sum.wvr.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash bc55f480d2dabcba35697f502078f181c178ae095f610e1cdbc5d03f14d18670 --- Real Ultimate output --- This is Ultimate 0.2.5-?-c7c6ca5-m [2024-11-09 02:45:11,298 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-09 02:45:11,355 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-11-09 02:45:11,361 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-09 02:45:11,363 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-09 02:45:11,381 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-09 02:45:11,382 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-09 02:45:11,382 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-09 02:45:11,383 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-09 02:45:11,383 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-09 02:45:11,383 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-09 02:45:11,384 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-09 02:45:11,384 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-09 02:45:11,384 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-09 02:45:11,385 INFO L153 SettingsManager]: * Use SBE=true [2024-11-09 02:45:11,385 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-09 02:45:11,385 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-11-09 02:45:11,386 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-09 02:45:11,386 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-09 02:45:11,386 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-09 02:45:11,387 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-09 02:45:11,387 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-11-09 02:45:11,387 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-09 02:45:11,388 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-11-09 02:45:11,388 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-09 02:45:11,388 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-09 02:45:11,388 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-11-09 02:45:11,388 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-09 02:45:11,389 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-09 02:45:11,389 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-09 02:45:11,389 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-09 02:45:11,389 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-09 02:45:11,390 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-09 02:45:11,390 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-09 02:45:11,390 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-09 02:45:11,390 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-11-09 02:45:11,390 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-09 02:45:11,391 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-09 02:45:11,391 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-09 02:45:11,391 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-09 02:45:11,391 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-09 02:45:11,393 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-09 02:45:11,394 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> bc55f480d2dabcba35697f502078f181c178ae095f610e1cdbc5d03f14d18670 [2024-11-09 02:45:11,616 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-09 02:45:11,638 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-09 02:45:11,640 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-09 02:45:11,641 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-09 02:45:11,642 INFO L274 PluginConnector]: CDTParser initialized [2024-11-09 02:45:11,643 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/weaver/popl20-channel-sum.wvr.c [2024-11-09 02:45:12,888 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-09 02:45:13,068 INFO L384 CDTParser]: Found 1 translation units. [2024-11-09 02:45:13,068 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/popl20-channel-sum.wvr.c [2024-11-09 02:45:13,074 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d5955c808/7375d69961cd4ed1b527a0b7bcdcc240/FLAG5e613f2d6 [2024-11-09 02:45:13,087 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d5955c808/7375d69961cd4ed1b527a0b7bcdcc240 [2024-11-09 02:45:13,091 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-09 02:45:13,092 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-09 02:45:13,097 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-09 02:45:13,097 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-09 02:45:13,102 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-09 02:45:13,102 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.11 02:45:13" (1/1) ... [2024-11-09 02:45:13,103 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@680515b0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 02:45:13, skipping insertion in model container [2024-11-09 02:45:13,103 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.11 02:45:13" (1/1) ... [2024-11-09 02:45:13,123 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-09 02:45:13,291 WARN L250 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/popl20-channel-sum.wvr.c[2423,2436] [2024-11-09 02:45:13,299 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-09 02:45:13,305 INFO L200 MainTranslator]: Completed pre-run [2024-11-09 02:45:13,321 WARN L250 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/popl20-channel-sum.wvr.c[2423,2436] [2024-11-09 02:45:13,323 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-09 02:45:13,336 INFO L204 MainTranslator]: Completed translation [2024-11-09 02:45:13,336 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 02:45:13 WrapperNode [2024-11-09 02:45:13,336 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-09 02:45:13,337 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-09 02:45:13,337 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-09 02:45:13,337 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-09 02:45:13,346 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 02:45:13" (1/1) ... [2024-11-09 02:45:13,351 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 02:45:13" (1/1) ... [2024-11-09 02:45:13,367 INFO L138 Inliner]: procedures = 21, calls = 21, calls flagged for inlining = 10, calls inlined = 10, statements flattened = 135 [2024-11-09 02:45:13,368 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-09 02:45:13,368 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-09 02:45:13,368 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-09 02:45:13,368 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-09 02:45:13,376 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 02:45:13" (1/1) ... [2024-11-09 02:45:13,377 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 02:45:13" (1/1) ... [2024-11-09 02:45:13,378 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 02:45:13" (1/1) ... [2024-11-09 02:45:13,389 INFO L175 MemorySlicer]: Split 6 memory accesses to 2 slices as follows [2, 4]. 67 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0]. The 1 writes are split as follows [0, 1]. [2024-11-09 02:45:13,389 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 02:45:13" (1/1) ... [2024-11-09 02:45:13,390 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 02:45:13" (1/1) ... [2024-11-09 02:45:13,393 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 02:45:13" (1/1) ... [2024-11-09 02:45:13,396 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 02:45:13" (1/1) ... [2024-11-09 02:45:13,397 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 02:45:13" (1/1) ... [2024-11-09 02:45:13,398 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 02:45:13" (1/1) ... [2024-11-09 02:45:13,404 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-09 02:45:13,405 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-09 02:45:13,405 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-09 02:45:13,405 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-09 02:45:13,406 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 02:45:13" (1/1) ... [2024-11-09 02:45:13,412 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-09 02:45:13,420 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-09 02:45:13,452 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-11-09 02:45:13,454 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-11-09 02:45:13,526 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-09 02:45:13,526 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2024-11-09 02:45:13,527 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2024-11-09 02:45:13,527 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2024-11-09 02:45:13,527 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2024-11-09 02:45:13,527 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-11-09 02:45:13,527 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-11-09 02:45:13,527 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-11-09 02:45:13,527 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-11-09 02:45:13,527 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-11-09 02:45:13,527 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-09 02:45:13,527 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-09 02:45:13,527 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-11-09 02:45:13,527 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-11-09 02:45:13,528 WARN L207 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2024-11-09 02:45:13,616 INFO L238 CfgBuilder]: Building ICFG [2024-11-09 02:45:13,618 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-09 02:45:13,836 INFO L283 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2024-11-09 02:45:13,836 INFO L287 CfgBuilder]: Performing block encoding [2024-11-09 02:45:13,972 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-09 02:45:13,972 INFO L316 CfgBuilder]: Removed 3 assume(true) statements. [2024-11-09 02:45:13,973 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.11 02:45:13 BoogieIcfgContainer [2024-11-09 02:45:13,973 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-09 02:45:13,974 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-09 02:45:13,974 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-09 02:45:13,977 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-09 02:45:13,977 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.11 02:45:13" (1/3) ... [2024-11-09 02:45:13,978 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3a51e712 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.11 02:45:13, skipping insertion in model container [2024-11-09 02:45:13,978 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 02:45:13" (2/3) ... [2024-11-09 02:45:13,979 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3a51e712 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.11 02:45:13, skipping insertion in model container [2024-11-09 02:45:13,980 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.11 02:45:13" (3/3) ... [2024-11-09 02:45:13,981 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-channel-sum.wvr.c [2024-11-09 02:45:13,994 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-09 02:45:13,994 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-11-09 02:45:13,994 INFO L489 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-11-09 02:45:14,038 INFO L143 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2024-11-09 02:45:14,073 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 38 places, 36 transitions, 86 flow [2024-11-09 02:45:14,098 INFO L124 PetriNetUnfolderBase]: 5/34 cut-off events. [2024-11-09 02:45:14,098 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-11-09 02:45:14,100 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43 conditions, 34 events. 5/34 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 37 event pairs, 0 based on Foata normal form. 0/28 useless extension candidates. Maximal degree in co-relation 23. Up to 2 conditions per place. [2024-11-09 02:45:14,101 INFO L82 GeneralOperation]: Start removeDead. Operand has 38 places, 36 transitions, 86 flow [2024-11-09 02:45:14,106 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 35 places, 33 transitions, 78 flow [2024-11-09 02:45:14,115 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-09 02:45:14,123 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;@b86615e, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-09 02:45:14,123 INFO L334 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2024-11-09 02:45:14,137 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-11-09 02:45:14,137 INFO L124 PetriNetUnfolderBase]: 5/32 cut-off events. [2024-11-09 02:45:14,137 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-11-09 02:45:14,138 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 02:45:14,138 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 02:45:14,139 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-09 02:45:14,143 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 02:45:14,143 INFO L85 PathProgramCache]: Analyzing trace with hash -1803493828, now seen corresponding path program 1 times [2024-11-09 02:45:14,150 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 02:45:14,151 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [570620230] [2024-11-09 02:45:14,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 02:45:14,151 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 02:45:14,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 02:45:14,319 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 02:45:14,320 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 02:45:14,321 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [570620230] [2024-11-09 02:45:14,321 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [570620230] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 02:45:14,321 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 02:45:14,322 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-09 02:45:14,323 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2129998142] [2024-11-09 02:45:14,324 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 02:45:14,331 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2024-11-09 02:45:14,336 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 02:45:14,359 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2024-11-09 02:45:14,360 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-11-09 02:45:14,361 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 36 [2024-11-09 02:45:14,363 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 35 places, 33 transitions, 78 flow. Second operand has 2 states, 2 states have (on average 17.0) internal successors, (34), 2 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) [2024-11-09 02:45:14,363 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-09 02:45:14,363 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 36 [2024-11-09 02:45:14,364 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-09 02:45:14,453 INFO L124 PetriNetUnfolderBase]: 203/343 cut-off events. [2024-11-09 02:45:14,453 INFO L125 PetriNetUnfolderBase]: For 29/29 co-relation queries the response was YES. [2024-11-09 02:45:14,456 INFO L83 FinitePrefix]: Finished finitePrefix Result has 675 conditions, 343 events. 203/343 cut-off events. For 29/29 co-relation queries the response was YES. Maximal size of possible extension queue 32. Compared 1236 event pairs, 137 based on Foata normal form. 0/277 useless extension candidates. Maximal degree in co-relation 599. Up to 306 conditions per place. [2024-11-09 02:45:14,460 INFO L140 encePairwiseOnDemand]: 35/36 looper letters, 24 selfloop transitions, 0 changer transitions 0/32 dead transitions. [2024-11-09 02:45:14,460 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 36 places, 32 transitions, 124 flow [2024-11-09 02:45:14,462 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2024-11-09 02:45:14,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2024-11-09 02:45:14,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 45 transitions. [2024-11-09 02:45:14,471 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.625 [2024-11-09 02:45:14,473 INFO L175 Difference]: Start difference. First operand has 35 places, 33 transitions, 78 flow. Second operand 2 states and 45 transitions. [2024-11-09 02:45:14,474 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 36 places, 32 transitions, 124 flow [2024-11-09 02:45:14,477 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 32 places, 32 transitions, 116 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-11-09 02:45:14,478 INFO L231 Difference]: Finished difference. Result has 32 places, 32 transitions, 68 flow [2024-11-09 02:45:14,480 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=36, PETRI_DIFFERENCE_MINUEND_FLOW=68, PETRI_DIFFERENCE_MINUEND_PLACES=31, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=32, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=68, PETRI_PLACES=32, PETRI_TRANSITIONS=32} [2024-11-09 02:45:14,484 INFO L277 CegarLoopForPetriNet]: 35 programPoint places, -3 predicate places. [2024-11-09 02:45:14,484 INFO L471 AbstractCegarLoop]: Abstraction has has 32 places, 32 transitions, 68 flow [2024-11-09 02:45:14,484 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 17.0) internal successors, (34), 2 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) [2024-11-09 02:45:14,485 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 02:45:14,485 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] [2024-11-09 02:45:14,485 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-09 02:45:14,486 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-09 02:45:14,486 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 02:45:14,486 INFO L85 PathProgramCache]: Analyzing trace with hash 1165612234, now seen corresponding path program 1 times [2024-11-09 02:45:14,487 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 02:45:14,487 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1455079745] [2024-11-09 02:45:14,487 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 02:45:14,488 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 02:45:14,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 02:45:14,621 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 02:45:14,623 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 02:45:14,623 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1455079745] [2024-11-09 02:45:14,624 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1455079745] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 02:45:14,624 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 02:45:14,624 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-09 02:45:14,624 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [310394354] [2024-11-09 02:45:14,624 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 02:45:14,625 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-09 02:45:14,625 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 02:45:14,626 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-09 02:45:14,626 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-09 02:45:14,626 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 36 [2024-11-09 02:45:14,627 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 32 places, 32 transitions, 68 flow. Second operand has 3 states, 3 states have (on average 15.0) internal successors, (45), 3 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 02:45:14,627 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-09 02:45:14,627 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 36 [2024-11-09 02:45:14,627 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-09 02:45:14,785 INFO L124 PetriNetUnfolderBase]: 278/494 cut-off events. [2024-11-09 02:45:14,785 INFO L125 PetriNetUnfolderBase]: For 8/8 co-relation queries the response was YES. [2024-11-09 02:45:14,787 INFO L83 FinitePrefix]: Finished finitePrefix Result has 968 conditions, 494 events. 278/494 cut-off events. For 8/8 co-relation queries the response was YES. Maximal size of possible extension queue 40. Compared 2133 event pairs, 108 based on Foata normal form. 1/414 useless extension candidates. Maximal degree in co-relation 965. Up to 252 conditions per place. [2024-11-09 02:45:14,789 INFO L140 encePairwiseOnDemand]: 33/36 looper letters, 38 selfloop transitions, 2 changer transitions 2/50 dead transitions. [2024-11-09 02:45:14,789 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 34 places, 50 transitions, 191 flow [2024-11-09 02:45:14,790 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-09 02:45:14,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-09 02:45:14,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 73 transitions. [2024-11-09 02:45:14,792 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6759259259259259 [2024-11-09 02:45:14,792 INFO L175 Difference]: Start difference. First operand has 32 places, 32 transitions, 68 flow. Second operand 3 states and 73 transitions. [2024-11-09 02:45:14,792 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 34 places, 50 transitions, 191 flow [2024-11-09 02:45:14,793 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 34 places, 50 transitions, 191 flow, removed 0 selfloop flow, removed 0 redundant places. [2024-11-09 02:45:14,795 INFO L231 Difference]: Finished difference. Result has 35 places, 33 transitions, 80 flow [2024-11-09 02:45:14,795 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=36, PETRI_DIFFERENCE_MINUEND_FLOW=68, PETRI_DIFFERENCE_MINUEND_PLACES=32, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=32, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=80, PETRI_PLACES=35, PETRI_TRANSITIONS=33} [2024-11-09 02:45:14,796 INFO L277 CegarLoopForPetriNet]: 35 programPoint places, 0 predicate places. [2024-11-09 02:45:14,796 INFO L471 AbstractCegarLoop]: Abstraction has has 35 places, 33 transitions, 80 flow [2024-11-09 02:45:14,796 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 15.0) internal successors, (45), 3 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 02:45:14,796 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 02:45:14,796 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] [2024-11-09 02:45:14,797 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-09 02:45:14,797 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-09 02:45:14,797 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 02:45:14,797 INFO L85 PathProgramCache]: Analyzing trace with hash -519027332, now seen corresponding path program 1 times [2024-11-09 02:45:14,797 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 02:45:14,797 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1172217828] [2024-11-09 02:45:14,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 02:45:14,798 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 02:45:14,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 02:45:14,859 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 02:45:14,859 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 02:45:14,860 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1172217828] [2024-11-09 02:45:14,860 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1172217828] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 02:45:14,860 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 02:45:14,860 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-09 02:45:14,860 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1640658689] [2024-11-09 02:45:14,860 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 02:45:14,862 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-09 02:45:14,862 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 02:45:14,863 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-09 02:45:14,863 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-09 02:45:14,865 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 36 [2024-11-09 02:45:14,866 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 35 places, 33 transitions, 80 flow. Second operand has 3 states, 3 states have (on average 14.666666666666666) internal successors, (44), 3 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 02:45:14,866 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-09 02:45:14,866 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 36 [2024-11-09 02:45:14,866 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-09 02:45:14,961 INFO L124 PetriNetUnfolderBase]: 282/531 cut-off events. [2024-11-09 02:45:14,961 INFO L125 PetriNetUnfolderBase]: For 48/48 co-relation queries the response was YES. [2024-11-09 02:45:14,962 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1093 conditions, 531 events. 282/531 cut-off events. For 48/48 co-relation queries the response was YES. Maximal size of possible extension queue 31. Compared 1970 event pairs, 114 based on Foata normal form. 0/444 useless extension candidates. Maximal degree in co-relation 1088. Up to 341 conditions per place. [2024-11-09 02:45:14,967 INFO L140 encePairwiseOnDemand]: 29/36 looper letters, 33 selfloop transitions, 6 changer transitions 1/46 dead transitions. [2024-11-09 02:45:14,968 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 37 places, 46 transitions, 190 flow [2024-11-09 02:45:14,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-09 02:45:14,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-09 02:45:14,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 64 transitions. [2024-11-09 02:45:14,969 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5925925925925926 [2024-11-09 02:45:14,969 INFO L175 Difference]: Start difference. First operand has 35 places, 33 transitions, 80 flow. Second operand 3 states and 64 transitions. [2024-11-09 02:45:14,969 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 37 places, 46 transitions, 190 flow [2024-11-09 02:45:14,970 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 36 places, 46 transitions, 188 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-09 02:45:14,970 INFO L231 Difference]: Finished difference. Result has 37 places, 35 transitions, 106 flow [2024-11-09 02:45:14,970 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=36, PETRI_DIFFERENCE_MINUEND_FLOW=78, PETRI_DIFFERENCE_MINUEND_PLACES=34, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=106, PETRI_PLACES=37, PETRI_TRANSITIONS=35} [2024-11-09 02:45:14,973 INFO L277 CegarLoopForPetriNet]: 35 programPoint places, 2 predicate places. [2024-11-09 02:45:14,973 INFO L471 AbstractCegarLoop]: Abstraction has has 37 places, 35 transitions, 106 flow [2024-11-09 02:45:14,973 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 14.666666666666666) internal successors, (44), 3 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 02:45:14,973 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 02:45:14,974 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 02:45:14,974 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-11-09 02:45:14,974 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-09 02:45:14,975 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 02:45:14,975 INFO L85 PathProgramCache]: Analyzing trace with hash -2097907175, now seen corresponding path program 1 times [2024-11-09 02:45:14,975 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 02:45:14,975 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1481999721] [2024-11-09 02:45:14,975 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 02:45:14,975 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 02:45:14,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 02:45:15,110 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-09 02:45:15,111 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 02:45:15,111 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1481999721] [2024-11-09 02:45:15,114 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1481999721] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 02:45:15,114 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 02:45:15,114 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-09 02:45:15,115 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1140623801] [2024-11-09 02:45:15,116 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 02:45:15,116 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-09 02:45:15,116 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 02:45:15,117 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-09 02:45:15,117 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-09 02:45:15,117 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 36 [2024-11-09 02:45:15,119 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 37 places, 35 transitions, 106 flow. Second operand has 4 states, 4 states have (on average 15.5) internal successors, (62), 4 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 02:45:15,119 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-09 02:45:15,119 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 36 [2024-11-09 02:45:15,119 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-09 02:45:15,238 INFO L124 PetriNetUnfolderBase]: 262/514 cut-off events. [2024-11-09 02:45:15,239 INFO L125 PetriNetUnfolderBase]: For 101/101 co-relation queries the response was YES. [2024-11-09 02:45:15,240 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1184 conditions, 514 events. 262/514 cut-off events. For 101/101 co-relation queries the response was YES. Maximal size of possible extension queue 32. Compared 1912 event pairs, 203 based on Foata normal form. 0/454 useless extension candidates. Maximal degree in co-relation 1178. Up to 471 conditions per place. [2024-11-09 02:45:15,241 INFO L140 encePairwiseOnDemand]: 31/36 looper letters, 25 selfloop transitions, 3 changer transitions 9/45 dead transitions. [2024-11-09 02:45:15,241 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 40 places, 45 transitions, 202 flow [2024-11-09 02:45:15,242 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-09 02:45:15,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-09 02:45:15,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 75 transitions. [2024-11-09 02:45:15,243 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5208333333333334 [2024-11-09 02:45:15,243 INFO L175 Difference]: Start difference. First operand has 37 places, 35 transitions, 106 flow. Second operand 4 states and 75 transitions. [2024-11-09 02:45:15,243 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 40 places, 45 transitions, 202 flow [2024-11-09 02:45:15,244 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 39 places, 45 transitions, 196 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-09 02:45:15,245 INFO L231 Difference]: Finished difference. Result has 41 places, 36 transitions, 118 flow [2024-11-09 02:45:15,245 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=36, PETRI_DIFFERENCE_MINUEND_FLOW=100, PETRI_DIFFERENCE_MINUEND_PLACES=36, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=35, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=118, PETRI_PLACES=41, PETRI_TRANSITIONS=36} [2024-11-09 02:45:15,246 INFO L277 CegarLoopForPetriNet]: 35 programPoint places, 6 predicate places. [2024-11-09 02:45:15,246 INFO L471 AbstractCegarLoop]: Abstraction has has 41 places, 36 transitions, 118 flow [2024-11-09 02:45:15,247 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.5) internal successors, (62), 4 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 02:45:15,247 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 02:45:15,247 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 02:45:15,247 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-11-09 02:45:15,247 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-09 02:45:15,248 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 02:45:15,248 INFO L85 PathProgramCache]: Analyzing trace with hash -1960581350, now seen corresponding path program 1 times [2024-11-09 02:45:15,248 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 02:45:15,248 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [744906375] [2024-11-09 02:45:15,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 02:45:15,249 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 02:45:15,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 02:45:15,916 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 02:45:15,916 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 02:45:15,917 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [744906375] [2024-11-09 02:45:15,917 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [744906375] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 02:45:15,917 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2130103342] [2024-11-09 02:45:15,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 02:45:15,917 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 02:45:15,917 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-09 02:45:15,920 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 02:45:15,921 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-09 02:45:15,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 02:45:15,989 INFO L255 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 26 conjuncts are in the unsatisfiable core [2024-11-09 02:45:15,995 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 02:45:16,084 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 1 [2024-11-09 02:45:16,414 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 02:45:16,415 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 02:45:16,929 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 61 treesize of output 55 [2024-11-09 02:45:16,945 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-09 02:45:16,945 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 78 treesize of output 68 [2024-11-09 02:45:17,099 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 02:45:17,100 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2130103342] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 02:45:17,100 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 02:45:17,100 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 25 [2024-11-09 02:45:17,101 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [799963315] [2024-11-09 02:45:17,101 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 02:45:17,101 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2024-11-09 02:45:17,102 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 02:45:17,102 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2024-11-09 02:45:17,103 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=142, Invalid=508, Unknown=0, NotChecked=0, Total=650 [2024-11-09 02:45:17,107 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 36 [2024-11-09 02:45:17,107 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 36 transitions, 118 flow. Second operand has 26 states, 26 states have (on average 10.538461538461538) internal successors, (274), 26 states have internal predecessors, (274), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 02:45:17,108 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-09 02:45:17,108 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 36 [2024-11-09 02:45:17,108 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-09 02:45:19,068 INFO L124 PetriNetUnfolderBase]: 796/1505 cut-off events. [2024-11-09 02:45:19,070 INFO L125 PetriNetUnfolderBase]: For 215/215 co-relation queries the response was YES. [2024-11-09 02:45:19,073 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3440 conditions, 1505 events. 796/1505 cut-off events. For 215/215 co-relation queries the response was YES. Maximal size of possible extension queue 75. Compared 7997 event pairs, 63 based on Foata normal form. 2/1368 useless extension candidates. Maximal degree in co-relation 3432. Up to 308 conditions per place. [2024-11-09 02:45:19,078 INFO L140 encePairwiseOnDemand]: 20/36 looper letters, 149 selfloop transitions, 82 changer transitions 59/296 dead transitions. [2024-11-09 02:45:19,078 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 80 places, 296 transitions, 1426 flow [2024-11-09 02:45:19,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2024-11-09 02:45:19,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2024-11-09 02:45:19,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 606 transitions. [2024-11-09 02:45:19,084 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.42083333333333334 [2024-11-09 02:45:19,084 INFO L175 Difference]: Start difference. First operand has 41 places, 36 transitions, 118 flow. Second operand 40 states and 606 transitions. [2024-11-09 02:45:19,084 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 80 places, 296 transitions, 1426 flow [2024-11-09 02:45:19,087 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 77 places, 296 transitions, 1376 flow, removed 22 selfloop flow, removed 3 redundant places. [2024-11-09 02:45:19,090 INFO L231 Difference]: Finished difference. Result has 104 places, 116 transitions, 752 flow [2024-11-09 02:45:19,090 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=36, PETRI_DIFFERENCE_MINUEND_FLOW=108, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=36, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=17, PETRI_DIFFERENCE_SUBTRAHEND_STATES=40, PETRI_FLOW=752, PETRI_PLACES=104, PETRI_TRANSITIONS=116} [2024-11-09 02:45:19,091 INFO L277 CegarLoopForPetriNet]: 35 programPoint places, 69 predicate places. [2024-11-09 02:45:19,091 INFO L471 AbstractCegarLoop]: Abstraction has has 104 places, 116 transitions, 752 flow [2024-11-09 02:45:19,091 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 10.538461538461538) internal successors, (274), 26 states have internal predecessors, (274), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 02:45:19,091 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 02:45:19,091 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 02:45:19,109 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-11-09 02:45:19,292 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 02:45:19,293 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-09 02:45:19,293 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 02:45:19,294 INFO L85 PathProgramCache]: Analyzing trace with hash -1366326741, now seen corresponding path program 1 times [2024-11-09 02:45:19,294 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 02:45:19,294 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [179713706] [2024-11-09 02:45:19,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 02:45:19,294 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 02:45:19,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 02:45:19,346 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-09 02:45:19,348 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 02:45:19,348 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [179713706] [2024-11-09 02:45:19,349 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [179713706] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 02:45:19,349 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 02:45:19,349 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-09 02:45:19,349 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [878576200] [2024-11-09 02:45:19,349 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 02:45:19,349 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-09 02:45:19,350 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 02:45:19,350 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-09 02:45:19,350 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-09 02:45:19,352 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 36 [2024-11-09 02:45:19,353 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 104 places, 116 transitions, 752 flow. Second operand has 3 states, 3 states have (on average 17.0) internal successors, (51), 3 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) [2024-11-09 02:45:19,353 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-09 02:45:19,353 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 36 [2024-11-09 02:45:19,353 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-09 02:45:19,509 INFO L124 PetriNetUnfolderBase]: 657/1222 cut-off events. [2024-11-09 02:45:19,510 INFO L125 PetriNetUnfolderBase]: For 4376/4376 co-relation queries the response was YES. [2024-11-09 02:45:19,514 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4517 conditions, 1222 events. 657/1222 cut-off events. For 4376/4376 co-relation queries the response was YES. Maximal size of possible extension queue 64. Compared 6081 event pairs, 203 based on Foata normal form. 4/1225 useless extension candidates. Maximal degree in co-relation 4484. Up to 1065 conditions per place. [2024-11-09 02:45:19,520 INFO L140 encePairwiseOnDemand]: 33/36 looper letters, 104 selfloop transitions, 2 changer transitions 4/117 dead transitions. [2024-11-09 02:45:19,520 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 94 places, 117 transitions, 976 flow [2024-11-09 02:45:19,520 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-09 02:45:19,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-09 02:45:19,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 66 transitions. [2024-11-09 02:45:19,522 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6111111111111112 [2024-11-09 02:45:19,522 INFO L175 Difference]: Start difference. First operand has 104 places, 116 transitions, 752 flow. Second operand 3 states and 66 transitions. [2024-11-09 02:45:19,522 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 94 places, 117 transitions, 976 flow [2024-11-09 02:45:19,541 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 117 transitions, 877 flow, removed 41 selfloop flow, removed 15 redundant places. [2024-11-09 02:45:19,543 INFO L231 Difference]: Finished difference. Result has 80 places, 94 transitions, 529 flow [2024-11-09 02:45:19,543 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=36, PETRI_DIFFERENCE_MINUEND_FLOW=515, PETRI_DIFFERENCE_MINUEND_PLACES=77, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=93, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=91, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=529, PETRI_PLACES=80, PETRI_TRANSITIONS=94} [2024-11-09 02:45:19,544 INFO L277 CegarLoopForPetriNet]: 35 programPoint places, 45 predicate places. [2024-11-09 02:45:19,544 INFO L471 AbstractCegarLoop]: Abstraction has has 80 places, 94 transitions, 529 flow [2024-11-09 02:45:19,546 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 17.0) internal successors, (51), 3 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) [2024-11-09 02:45:19,546 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 02:45:19,547 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 02:45:19,547 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-11-09 02:45:19,547 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-09 02:45:19,548 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 02:45:19,549 INFO L85 PathProgramCache]: Analyzing trace with hash 1340435701, now seen corresponding path program 2 times [2024-11-09 02:45:19,549 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 02:45:19,549 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [263200512] [2024-11-09 02:45:19,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 02:45:19,549 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 02:45:19,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 02:45:20,149 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 02:45:20,149 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 02:45:20,149 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [263200512] [2024-11-09 02:45:20,149 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [263200512] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 02:45:20,149 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2102137122] [2024-11-09 02:45:20,152 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-09 02:45:20,153 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 02:45:20,153 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-09 02:45:20,154 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 02:45:20,155 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-09 02:45:20,222 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-09 02:45:20,222 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 02:45:20,223 INFO L255 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 16 conjuncts are in the unsatisfiable core [2024-11-09 02:45:20,225 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 02:45:20,331 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-09 02:45:20,331 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 02:45:20,409 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-09 02:45:20,409 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 40 treesize of output 24 [2024-11-09 02:45:20,483 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-09 02:45:20,483 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2102137122] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 02:45:20,484 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 02:45:20,484 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 7, 6] total 19 [2024-11-09 02:45:20,484 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [904582877] [2024-11-09 02:45:20,484 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 02:45:20,484 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-11-09 02:45:20,485 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 02:45:20,485 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-11-09 02:45:20,485 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=289, Unknown=0, NotChecked=0, Total=380 [2024-11-09 02:45:20,496 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 36 [2024-11-09 02:45:20,497 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 80 places, 94 transitions, 529 flow. Second operand has 20 states, 20 states have (on average 11.25) internal successors, (225), 20 states have internal predecessors, (225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 02:45:20,497 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-09 02:45:20,497 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 36 [2024-11-09 02:45:20,497 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-09 02:45:21,103 INFO L124 PetriNetUnfolderBase]: 821/1582 cut-off events. [2024-11-09 02:45:21,103 INFO L125 PetriNetUnfolderBase]: For 2841/2841 co-relation queries the response was YES. [2024-11-09 02:45:21,109 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5395 conditions, 1582 events. 821/1582 cut-off events. For 2841/2841 co-relation queries the response was YES. Maximal size of possible extension queue 89. Compared 8637 event pairs, 85 based on Foata normal form. 2/1569 useless extension candidates. Maximal degree in co-relation 5370. Up to 601 conditions per place. [2024-11-09 02:45:21,116 INFO L140 encePairwiseOnDemand]: 24/36 looper letters, 141 selfloop transitions, 34 changer transitions 14/196 dead transitions. [2024-11-09 02:45:21,116 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 95 places, 196 transitions, 1467 flow [2024-11-09 02:45:21,116 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-11-09 02:45:21,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2024-11-09 02:45:21,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 251 transitions. [2024-11-09 02:45:21,117 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4357638888888889 [2024-11-09 02:45:21,117 INFO L175 Difference]: Start difference. First operand has 80 places, 94 transitions, 529 flow. Second operand 16 states and 251 transitions. [2024-11-09 02:45:21,117 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 95 places, 196 transitions, 1467 flow [2024-11-09 02:45:21,130 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 94 places, 196 transitions, 1464 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-09 02:45:21,134 INFO L231 Difference]: Finished difference. Result has 98 places, 106 transitions, 707 flow [2024-11-09 02:45:21,135 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=36, PETRI_DIFFERENCE_MINUEND_FLOW=527, PETRI_DIFFERENCE_MINUEND_PLACES=79, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=94, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=66, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=707, PETRI_PLACES=98, PETRI_TRANSITIONS=106} [2024-11-09 02:45:21,137 INFO L277 CegarLoopForPetriNet]: 35 programPoint places, 63 predicate places. [2024-11-09 02:45:21,137 INFO L471 AbstractCegarLoop]: Abstraction has has 98 places, 106 transitions, 707 flow [2024-11-09 02:45:21,138 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 11.25) internal successors, (225), 20 states have internal predecessors, (225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 02:45:21,138 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 02:45:21,138 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, 1, 1, 1, 1, 1, 1] [2024-11-09 02:45:21,152 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-11-09 02:45:21,338 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2024-11-09 02:45:21,339 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-09 02:45:21,339 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 02:45:21,339 INFO L85 PathProgramCache]: Analyzing trace with hash 2012483246, now seen corresponding path program 3 times [2024-11-09 02:45:21,339 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 02:45:21,340 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [836243794] [2024-11-09 02:45:21,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 02:45:21,340 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 02:45:21,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 02:45:21,459 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-09 02:45:21,459 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 02:45:21,459 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [836243794] [2024-11-09 02:45:21,459 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [836243794] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 02:45:21,461 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1458025277] [2024-11-09 02:45:21,461 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-09 02:45:21,461 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 02:45:21,461 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-09 02:45:21,465 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 02:45:21,467 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-09 02:45:21,526 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-11-09 02:45:21,526 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 02:45:21,528 INFO L255 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-11-09 02:45:21,529 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 02:45:21,572 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-09 02:45:21,572 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 02:45:21,616 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-09 02:45:21,617 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1458025277] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 02:45:21,617 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 02:45:21,617 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 4, 4] total 9 [2024-11-09 02:45:21,617 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1953406835] [2024-11-09 02:45:21,617 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 02:45:21,617 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-11-09 02:45:21,618 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 02:45:21,618 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-11-09 02:45:21,618 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-11-09 02:45:21,621 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 36 [2024-11-09 02:45:21,621 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 98 places, 106 transitions, 707 flow. Second operand has 9 states, 9 states have (on average 13.222222222222221) internal successors, (119), 9 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 02:45:21,621 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-09 02:45:21,621 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 36 [2024-11-09 02:45:21,621 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-09 02:45:21,966 INFO L124 PetriNetUnfolderBase]: 1177/2156 cut-off events. [2024-11-09 02:45:21,966 INFO L125 PetriNetUnfolderBase]: For 6653/6653 co-relation queries the response was YES. [2024-11-09 02:45:21,974 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8260 conditions, 2156 events. 1177/2156 cut-off events. For 6653/6653 co-relation queries the response was YES. Maximal size of possible extension queue 73. Compared 10641 event pairs, 294 based on Foata normal form. 62/2205 useless extension candidates. Maximal degree in co-relation 8231. Up to 703 conditions per place. [2024-11-09 02:45:21,982 INFO L140 encePairwiseOnDemand]: 24/36 looper letters, 98 selfloop transitions, 34 changer transitions 55/194 dead transitions. [2024-11-09 02:45:21,983 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 107 places, 194 transitions, 1618 flow [2024-11-09 02:45:21,983 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-11-09 02:45:21,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-11-09 02:45:21,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 200 transitions. [2024-11-09 02:45:21,984 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.46296296296296297 [2024-11-09 02:45:21,984 INFO L175 Difference]: Start difference. First operand has 98 places, 106 transitions, 707 flow. Second operand 12 states and 200 transitions. [2024-11-09 02:45:21,984 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 107 places, 194 transitions, 1618 flow [2024-11-09 02:45:21,997 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 102 places, 194 transitions, 1554 flow, removed 19 selfloop flow, removed 5 redundant places. [2024-11-09 02:45:21,999 INFO L231 Difference]: Finished difference. Result has 105 places, 96 transitions, 748 flow [2024-11-09 02:45:22,000 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=36, PETRI_DIFFERENCE_MINUEND_FLOW=591, PETRI_DIFFERENCE_MINUEND_PLACES=91, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=94, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=65, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=748, PETRI_PLACES=105, PETRI_TRANSITIONS=96} [2024-11-09 02:45:22,000 INFO L277 CegarLoopForPetriNet]: 35 programPoint places, 70 predicate places. [2024-11-09 02:45:22,001 INFO L471 AbstractCegarLoop]: Abstraction has has 105 places, 96 transitions, 748 flow [2024-11-09 02:45:22,001 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.222222222222221) internal successors, (119), 9 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 02:45:22,001 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 02:45:22,001 INFO L204 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 02:45:22,015 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2024-11-09 02:45:22,205 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 02:45:22,206 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-09 02:45:22,206 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 02:45:22,206 INFO L85 PathProgramCache]: Analyzing trace with hash -371141210, now seen corresponding path program 4 times [2024-11-09 02:45:22,207 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 02:45:22,207 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1000533319] [2024-11-09 02:45:22,207 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 02:45:22,207 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 02:45:22,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 02:45:22,339 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-09 02:45:22,340 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 02:45:22,340 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1000533319] [2024-11-09 02:45:22,340 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1000533319] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 02:45:22,340 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 02:45:22,340 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-09 02:45:22,340 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1566232680] [2024-11-09 02:45:22,340 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 02:45:22,340 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-09 02:45:22,340 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 02:45:22,341 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-09 02:45:22,341 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-09 02:45:22,342 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 36 [2024-11-09 02:45:22,342 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 105 places, 96 transitions, 748 flow. Second operand has 4 states, 4 states have (on average 17.0) internal successors, (68), 4 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 02:45:22,342 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-09 02:45:22,342 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 36 [2024-11-09 02:45:22,342 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-09 02:45:22,594 INFO L124 PetriNetUnfolderBase]: 1390/2528 cut-off events. [2024-11-09 02:45:22,595 INFO L125 PetriNetUnfolderBase]: For 9703/9703 co-relation queries the response was YES. [2024-11-09 02:45:22,603 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10058 conditions, 2528 events. 1390/2528 cut-off events. For 9703/9703 co-relation queries the response was YES. Maximal size of possible extension queue 69. Compared 12500 event pairs, 302 based on Foata normal form. 127/2654 useless extension candidates. Maximal degree in co-relation 10026. Up to 1259 conditions per place. [2024-11-09 02:45:22,614 INFO L140 encePairwiseOnDemand]: 32/36 looper letters, 109 selfloop transitions, 4 changer transitions 2/122 dead transitions. [2024-11-09 02:45:22,614 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 95 places, 122 transitions, 1179 flow [2024-11-09 02:45:22,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-09 02:45:22,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-09 02:45:22,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 77 transitions. [2024-11-09 02:45:22,615 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5347222222222222 [2024-11-09 02:45:22,615 INFO L175 Difference]: Start difference. First operand has 105 places, 96 transitions, 748 flow. Second operand 4 states and 77 transitions. [2024-11-09 02:45:22,615 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 95 places, 122 transitions, 1179 flow [2024-11-09 02:45:22,633 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 122 transitions, 1051 flow, removed 30 selfloop flow, removed 16 redundant places. [2024-11-09 02:45:22,634 INFO L231 Difference]: Finished difference. Result has 81 places, 95 transitions, 664 flow [2024-11-09 02:45:22,634 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=36, PETRI_DIFFERENCE_MINUEND_FLOW=643, PETRI_DIFFERENCE_MINUEND_PLACES=76, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=95, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=92, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=664, PETRI_PLACES=81, PETRI_TRANSITIONS=95} [2024-11-09 02:45:22,635 INFO L277 CegarLoopForPetriNet]: 35 programPoint places, 46 predicate places. [2024-11-09 02:45:22,635 INFO L471 AbstractCegarLoop]: Abstraction has has 81 places, 95 transitions, 664 flow [2024-11-09 02:45:22,635 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 17.0) internal successors, (68), 4 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 02:45:22,635 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 02:45:22,635 INFO L204 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 02:45:22,635 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-11-09 02:45:22,635 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-09 02:45:22,636 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 02:45:22,636 INFO L85 PathProgramCache]: Analyzing trace with hash 1633699317, now seen corresponding path program 1 times [2024-11-09 02:45:22,636 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 02:45:22,636 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1801703298] [2024-11-09 02:45:22,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 02:45:22,636 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 02:45:22,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 02:45:23,494 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 02:45:23,495 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 02:45:23,495 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1801703298] [2024-11-09 02:45:23,495 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1801703298] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 02:45:23,495 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [768021653] [2024-11-09 02:45:23,495 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 02:45:23,495 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 02:45:23,495 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-09 02:45:23,497 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 02:45:23,498 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-09 02:45:23,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 02:45:23,563 INFO L255 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 39 conjuncts are in the unsatisfiable core [2024-11-09 02:45:23,565 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 02:45:24,141 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 02:45:24,141 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 02:45:24,582 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-09 02:45:24,582 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 75 treesize of output 60 [2024-11-09 02:45:24,904 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 3 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 02:45:24,904 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [768021653] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 02:45:24,904 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 02:45:24,904 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15, 15] total 43 [2024-11-09 02:45:24,904 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1371843611] [2024-11-09 02:45:24,905 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 02:45:24,905 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2024-11-09 02:45:24,905 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 02:45:24,906 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2024-11-09 02:45:24,906 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=292, Invalid=1600, Unknown=0, NotChecked=0, Total=1892 [2024-11-09 02:45:24,910 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 36 [2024-11-09 02:45:24,911 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 81 places, 95 transitions, 664 flow. Second operand has 44 states, 44 states have (on average 10.113636363636363) internal successors, (445), 44 states have internal predecessors, (445), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 02:45:24,911 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-09 02:45:24,911 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 36 [2024-11-09 02:45:24,911 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-09 02:45:50,439 INFO L124 PetriNetUnfolderBase]: 13949/26223 cut-off events. [2024-11-09 02:45:50,439 INFO L125 PetriNetUnfolderBase]: For 67036/67036 co-relation queries the response was YES. [2024-11-09 02:45:50,562 INFO L83 FinitePrefix]: Finished finitePrefix Result has 94494 conditions, 26223 events. 13949/26223 cut-off events. For 67036/67036 co-relation queries the response was YES. Maximal size of possible extension queue 635. Compared 214283 event pairs, 963 based on Foata normal form. 207/26345 useless extension candidates. Maximal degree in co-relation 94469. Up to 6051 conditions per place. [2024-11-09 02:45:50,655 INFO L140 encePairwiseOnDemand]: 20/36 looper letters, 1131 selfloop transitions, 1313 changer transitions 486/2938 dead transitions. [2024-11-09 02:45:50,655 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 429 places, 2938 transitions, 23492 flow [2024-11-09 02:45:50,656 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 349 states. [2024-11-09 02:45:50,656 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 349 states. [2024-11-09 02:45:50,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 349 states to 349 states and 5038 transitions. [2024-11-09 02:45:50,678 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.400986946832219 [2024-11-09 02:45:50,678 INFO L175 Difference]: Start difference. First operand has 81 places, 95 transitions, 664 flow. Second operand 349 states and 5038 transitions. [2024-11-09 02:45:50,678 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 429 places, 2938 transitions, 23492 flow [2024-11-09 02:45:50,830 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 427 places, 2938 transitions, 23074 flow, removed 207 selfloop flow, removed 2 redundant places. [2024-11-09 02:45:50,860 INFO L231 Difference]: Finished difference. Result has 581 places, 1459 transitions, 15406 flow [2024-11-09 02:45:50,861 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=36, PETRI_DIFFERENCE_MINUEND_FLOW=649, PETRI_DIFFERENCE_MINUEND_PLACES=79, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=95, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=59, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=349, PETRI_FLOW=15406, PETRI_PLACES=581, PETRI_TRANSITIONS=1459} [2024-11-09 02:45:50,862 INFO L277 CegarLoopForPetriNet]: 35 programPoint places, 546 predicate places. [2024-11-09 02:45:50,862 INFO L471 AbstractCegarLoop]: Abstraction has has 581 places, 1459 transitions, 15406 flow [2024-11-09 02:45:50,863 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 10.113636363636363) internal successors, (445), 44 states have internal predecessors, (445), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 02:45:50,863 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 02:45:50,863 INFO L204 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 02:45:50,876 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-11-09 02:45:51,066 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 02:45:51,067 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-09 02:45:51,068 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 02:45:51,068 INFO L85 PathProgramCache]: Analyzing trace with hash -1899916915, now seen corresponding path program 2 times [2024-11-09 02:45:51,068 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 02:45:51,068 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1194008537] [2024-11-09 02:45:51,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 02:45:51,068 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 02:45:51,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 02:45:52,244 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 02:45:52,245 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 02:45:52,245 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1194008537] [2024-11-09 02:45:52,245 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1194008537] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 02:45:52,245 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [699425435] [2024-11-09 02:45:52,245 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-09 02:45:52,245 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 02:45:52,245 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-09 02:45:52,247 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 02:45:52,247 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-09 02:45:52,310 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-09 02:45:52,310 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 02:45:52,312 INFO L255 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 33 conjuncts are in the unsatisfiable core [2024-11-09 02:45:52,313 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 02:45:52,828 INFO L349 Elim1Store]: treesize reduction 38, result has 15.6 percent of original size [2024-11-09 02:45:52,829 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 48 treesize of output 21 [2024-11-09 02:45:52,866 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 02:45:52,866 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 02:45:53,261 INFO L349 Elim1Store]: treesize reduction 8, result has 82.2 percent of original size [2024-11-09 02:45:53,262 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 74 treesize of output 60 [2024-11-09 02:45:53,849 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 02:45:53,849 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [699425435] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 02:45:53,849 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 02:45:53,849 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15, 15] total 42 [2024-11-09 02:45:53,849 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [44094885] [2024-11-09 02:45:53,849 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 02:45:53,850 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2024-11-09 02:45:53,850 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 02:45:53,850 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2024-11-09 02:45:53,851 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=246, Invalid=1560, Unknown=0, NotChecked=0, Total=1806 [2024-11-09 02:45:53,855 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 36 [2024-11-09 02:45:53,856 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 581 places, 1459 transitions, 15406 flow. Second operand has 43 states, 43 states have (on average 10.13953488372093) internal successors, (436), 43 states have internal predecessors, (436), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 02:45:53,856 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-09 02:45:53,856 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 36 [2024-11-09 02:45:53,856 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-09 02:46:16,152 INFO L124 PetriNetUnfolderBase]: 22028/40783 cut-off events. [2024-11-09 02:46:16,152 INFO L125 PetriNetUnfolderBase]: For 5750678/5750678 co-relation queries the response was YES. [2024-11-09 02:46:17,694 INFO L83 FinitePrefix]: Finished finitePrefix Result has 364811 conditions, 40783 events. 22028/40783 cut-off events. For 5750678/5750678 co-relation queries the response was YES. Maximal size of possible extension queue 982. Compared 350404 event pairs, 2622 based on Foata normal form. 69/40622 useless extension candidates. Maximal degree in co-relation 364633. Up to 15108 conditions per place. [2024-11-09 02:46:17,870 INFO L140 encePairwiseOnDemand]: 20/36 looper letters, 1121 selfloop transitions, 2398 changer transitions 108/3635 dead transitions. [2024-11-09 02:46:17,870 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 662 places, 3635 transitions, 51271 flow [2024-11-09 02:46:17,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 104 states. [2024-11-09 02:46:17,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2024-11-09 02:46:17,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 1474 transitions. [2024-11-09 02:46:17,876 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.3936965811965812 [2024-11-09 02:46:17,876 INFO L175 Difference]: Start difference. First operand has 581 places, 1459 transitions, 15406 flow. Second operand 104 states and 1474 transitions. [2024-11-09 02:46:17,876 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 662 places, 3635 transitions, 51271 flow [2024-11-09 02:46:39,675 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 631 places, 3635 transitions, 45289 flow, removed 2799 selfloop flow, removed 31 redundant places. [2024-11-09 02:46:39,715 INFO L231 Difference]: Finished difference. Result has 664 places, 3014 transitions, 36039 flow [2024-11-09 02:46:39,716 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=36, PETRI_DIFFERENCE_MINUEND_FLOW=13035, PETRI_DIFFERENCE_MINUEND_PLACES=528, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1459, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=938, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=378, PETRI_DIFFERENCE_SUBTRAHEND_STATES=104, PETRI_FLOW=36039, PETRI_PLACES=664, PETRI_TRANSITIONS=3014} [2024-11-09 02:46:39,716 INFO L277 CegarLoopForPetriNet]: 35 programPoint places, 629 predicate places. [2024-11-09 02:46:39,716 INFO L471 AbstractCegarLoop]: Abstraction has has 664 places, 3014 transitions, 36039 flow [2024-11-09 02:46:39,717 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 10.13953488372093) internal successors, (436), 43 states have internal predecessors, (436), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 02:46:39,717 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 02:46:39,717 INFO L204 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 02:46:39,730 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-11-09 02:46:39,917 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2024-11-09 02:46:39,918 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-09 02:46:39,918 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 02:46:39,918 INFO L85 PathProgramCache]: Analyzing trace with hash 1987033207, now seen corresponding path program 3 times [2024-11-09 02:46:39,918 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 02:46:39,918 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1410910427] [2024-11-09 02:46:39,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 02:46:39,919 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 02:46:39,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 02:46:40,697 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 02:46:40,697 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 02:46:40,697 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1410910427] [2024-11-09 02:46:40,697 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1410910427] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 02:46:40,697 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [223050479] [2024-11-09 02:46:40,697 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-09 02:46:40,697 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 02:46:40,698 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-09 02:46:40,698 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 02:46:40,700 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-11-09 02:46:40,761 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-11-09 02:46:40,761 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 02:46:40,763 INFO L255 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 39 conjuncts are in the unsatisfiable core [2024-11-09 02:46:40,764 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 02:46:41,163 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-09 02:46:41,164 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 30 treesize of output 28 [2024-11-09 02:46:41,272 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 02:46:41,272 INFO L311 TraceCheckSpWp]: Computing backward predicates...