./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/weaver/popl20-bad-counter-queue2.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 803cd42f Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/weaver/popl20-bad-counter-queue2.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 14a9c1cac7f040ebf84fc8e1c821294cab75b8332a1643f6e05ef67dfff453ec --- Real Ultimate output --- This is Ultimate 0.2.5-tmp.dk.eval-assert-order-craig-803cd42-m [2024-11-22 13:48:29,460 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-22 13:48:29,514 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-11-22 13:48:29,519 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-22 13:48:29,519 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-22 13:48:29,558 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-22 13:48:29,558 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-22 13:48:29,558 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-22 13:48:29,559 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-22 13:48:29,559 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-22 13:48:29,561 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-22 13:48:29,561 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-22 13:48:29,568 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-22 13:48:29,568 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-22 13:48:29,569 INFO L153 SettingsManager]: * Use SBE=true [2024-11-22 13:48:29,569 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-22 13:48:29,569 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-11-22 13:48:29,569 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-22 13:48:29,570 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-22 13:48:29,570 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-22 13:48:29,570 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-22 13:48:29,574 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-11-22 13:48:29,574 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-22 13:48:29,574 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-11-22 13:48:29,574 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-22 13:48:29,575 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-22 13:48:29,575 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-11-22 13:48:29,575 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-22 13:48:29,575 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-22 13:48:29,575 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-22 13:48:29,575 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-22 13:48:29,576 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-22 13:48:29,576 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-22 13:48:29,576 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-22 13:48:29,576 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-22 13:48:29,576 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-11-22 13:48:29,576 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-22 13:48:29,577 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-22 13:48:29,577 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-22 13:48:29,577 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-22 13:48:29,580 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-22 13:48:29,580 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-22 13:48:29,580 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 14a9c1cac7f040ebf84fc8e1c821294cab75b8332a1643f6e05ef67dfff453ec [2024-11-22 13:48:29,793 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-22 13:48:29,826 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-22 13:48:29,832 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-22 13:48:29,833 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-22 13:48:29,836 INFO L274 PluginConnector]: CDTParser initialized [2024-11-22 13:48:29,837 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/weaver/popl20-bad-counter-queue2.wvr.c [2024-11-22 13:48:31,234 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-22 13:48:31,395 INFO L384 CDTParser]: Found 1 translation units. [2024-11-22 13:48:31,396 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/popl20-bad-counter-queue2.wvr.c [2024-11-22 13:48:31,404 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/db43c235c/eb84177106724fefa0dbe7a68240e55d/FLAGef2e3882f [2024-11-22 13:48:31,801 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/db43c235c/eb84177106724fefa0dbe7a68240e55d [2024-11-22 13:48:31,805 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-22 13:48:31,806 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-22 13:48:31,808 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-22 13:48:31,808 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-22 13:48:31,813 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-22 13:48:31,814 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.11 01:48:31" (1/1) ... [2024-11-22 13:48:31,815 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@523c5f5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:48:31, skipping insertion in model container [2024-11-22 13:48:31,815 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.11 01:48:31" (1/1) ... [2024-11-22 13:48:31,833 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-22 13:48:31,988 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-bad-counter-queue2.wvr.c[2297,2310] [2024-11-22 13:48:31,996 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-22 13:48:32,002 INFO L200 MainTranslator]: Completed pre-run [2024-11-22 13:48:32,016 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-bad-counter-queue2.wvr.c[2297,2310] [2024-11-22 13:48:32,020 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-22 13:48:32,033 INFO L204 MainTranslator]: Completed translation [2024-11-22 13:48:32,034 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:48:32 WrapperNode [2024-11-22 13:48:32,034 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-22 13:48:32,035 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-22 13:48:32,035 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-22 13:48:32,035 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-22 13:48:32,040 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:48:32" (1/1) ... [2024-11-22 13:48:32,046 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:48:32" (1/1) ... [2024-11-22 13:48:32,061 INFO L138 Inliner]: procedures = 25, calls = 26, calls flagged for inlining = 12, calls inlined = 12, statements flattened = 132 [2024-11-22 13:48:32,061 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-22 13:48:32,062 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-22 13:48:32,062 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-22 13:48:32,062 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-22 13:48:32,070 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:48:32" (1/1) ... [2024-11-22 13:48:32,071 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:48:32" (1/1) ... [2024-11-22 13:48:32,072 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:48:32" (1/1) ... [2024-11-22 13:48:32,082 INFO L175 MemorySlicer]: Split 5 memory accesses to 2 slices as follows [2, 3]. 60 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0]. The 1 writes are split as follows [0, 1]. [2024-11-22 13:48:32,082 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:48:32" (1/1) ... [2024-11-22 13:48:32,082 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:48:32" (1/1) ... [2024-11-22 13:48:32,087 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:48:32" (1/1) ... [2024-11-22 13:48:32,089 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:48:32" (1/1) ... [2024-11-22 13:48:32,093 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:48:32" (1/1) ... [2024-11-22 13:48:32,094 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:48:32" (1/1) ... [2024-11-22 13:48:32,096 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-22 13:48:32,097 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-22 13:48:32,097 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-22 13:48:32,097 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-22 13:48:32,099 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:48:32" (1/1) ... [2024-11-22 13:48:32,103 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-22 13:48:32,112 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-22 13:48:32,131 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) [2024-11-22 13:48:32,134 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 [2024-11-22 13:48:32,192 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-22 13:48:32,196 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2024-11-22 13:48:32,196 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2024-11-22 13:48:32,197 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2024-11-22 13:48:32,197 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2024-11-22 13:48:32,197 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-11-22 13:48:32,197 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-11-22 13:48:32,197 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-11-22 13:48:32,197 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-11-22 13:48:32,197 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-11-22 13:48:32,197 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-11-22 13:48:32,197 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-11-22 13:48:32,197 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-22 13:48:32,197 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-22 13:48:32,197 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-11-22 13:48:32,198 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-11-22 13:48:32,203 WARN L207 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2024-11-22 13:48:32,302 INFO L238 CfgBuilder]: Building ICFG [2024-11-22 13:48:32,303 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-22 13:48:32,505 INFO L283 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2024-11-22 13:48:32,505 INFO L287 CfgBuilder]: Performing block encoding [2024-11-22 13:48:32,684 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-22 13:48:32,685 INFO L316 CfgBuilder]: Removed 3 assume(true) statements. [2024-11-22 13:48:32,685 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 01:48:32 BoogieIcfgContainer [2024-11-22 13:48:32,685 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-22 13:48:32,688 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-22 13:48:32,689 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-22 13:48:32,691 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-22 13:48:32,692 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.11 01:48:31" (1/3) ... [2024-11-22 13:48:32,693 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@22a6596c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.11 01:48:32, skipping insertion in model container [2024-11-22 13:48:32,694 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:48:32" (2/3) ... [2024-11-22 13:48:32,694 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@22a6596c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.11 01:48:32, skipping insertion in model container [2024-11-22 13:48:32,694 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 01:48:32" (3/3) ... [2024-11-22 13:48:32,695 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-bad-counter-queue2.wvr.c [2024-11-22 13:48:32,709 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-22 13:48:32,710 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-11-22 13:48:32,710 INFO L489 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-11-22 13:48:32,750 INFO L143 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2024-11-22 13:48:32,781 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 28 places, 24 transitions, 62 flow [2024-11-22 13:48:32,806 INFO L124 PetriNetUnfolderBase]: 3/22 cut-off events. [2024-11-22 13:48:32,806 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-11-22 13:48:32,809 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31 conditions, 22 events. 3/22 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 22 event pairs, 0 based on Foata normal form. 0/18 useless extension candidates. Maximal degree in co-relation 15. Up to 2 conditions per place. [2024-11-22 13:48:32,809 INFO L82 GeneralOperation]: Start removeDead. Operand has 28 places, 24 transitions, 62 flow [2024-11-22 13:48:32,811 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 25 places, 21 transitions, 54 flow [2024-11-22 13:48:32,817 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-22 13:48:32,823 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;@432af105, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-22 13:48:32,823 INFO L334 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2024-11-22 13:48:32,829 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-11-22 13:48:32,829 INFO L124 PetriNetUnfolderBase]: 3/20 cut-off events. [2024-11-22 13:48:32,829 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-11-22 13:48:32,829 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-22 13:48:32,830 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-22 13:48:32,830 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-22 13:48:32,834 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 13:48:32,834 INFO L85 PathProgramCache]: Analyzing trace with hash -15705077, now seen corresponding path program 1 times [2024-11-22 13:48:32,842 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 13:48:32,842 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [466472220] [2024-11-22 13:48:32,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 13:48:32,843 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 13:48:32,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 13:48:33,013 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-22 13:48:33,013 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 13:48:33,013 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [466472220] [2024-11-22 13:48:33,014 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [466472220] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-22 13:48:33,014 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-22 13:48:33,014 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-22 13:48:33,015 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [203090333] [2024-11-22 13:48:33,016 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-22 13:48:33,021 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-22 13:48:33,025 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 13:48:33,041 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-22 13:48:33,041 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-22 13:48:33,042 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 24 [2024-11-22 13:48:33,044 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 25 places, 21 transitions, 54 flow. Second operand has 3 states, 3 states have (on average 9.333333333333334) internal successors, (28), 3 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-22 13:48:33,044 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-22 13:48:33,044 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 24 [2024-11-22 13:48:33,045 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-22 13:48:33,106 INFO L124 PetriNetUnfolderBase]: 93/181 cut-off events. [2024-11-22 13:48:33,106 INFO L125 PetriNetUnfolderBase]: For 18/18 co-relation queries the response was YES. [2024-11-22 13:48:33,107 INFO L83 FinitePrefix]: Finished finitePrefix Result has 373 conditions, 181 events. 93/181 cut-off events. For 18/18 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 581 event pairs, 22 based on Foata normal form. 1/177 useless extension candidates. Maximal degree in co-relation 315. Up to 113 conditions per place. [2024-11-22 13:48:33,110 INFO L140 encePairwiseOnDemand]: 20/24 looper letters, 25 selfloop transitions, 3 changer transitions 1/32 dead transitions. [2024-11-22 13:48:33,110 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 27 places, 32 transitions, 143 flow [2024-11-22 13:48:33,111 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-22 13:48:33,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-22 13:48:33,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 45 transitions. [2024-11-22 13:48:33,118 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.625 [2024-11-22 13:48:33,144 INFO L175 Difference]: Start difference. First operand has 25 places, 21 transitions, 54 flow. Second operand 3 states and 45 transitions. [2024-11-22 13:48:33,145 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 27 places, 32 transitions, 143 flow [2024-11-22 13:48:33,147 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 23 places, 32 transitions, 129 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-11-22 13:48:33,149 INFO L231 Difference]: Finished difference. Result has 24 places, 23 transitions, 65 flow [2024-11-22 13:48:33,150 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=24, PETRI_DIFFERENCE_MINUEND_FLOW=46, PETRI_DIFFERENCE_MINUEND_PLACES=21, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=21, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=18, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=65, PETRI_PLACES=24, PETRI_TRANSITIONS=23} [2024-11-22 13:48:33,152 INFO L277 CegarLoopForPetriNet]: 25 programPoint places, -1 predicate places. [2024-11-22 13:48:33,153 INFO L471 AbstractCegarLoop]: Abstraction has has 24 places, 23 transitions, 65 flow [2024-11-22 13:48:33,153 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 9.333333333333334) internal successors, (28), 3 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-22 13:48:33,153 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-22 13:48:33,153 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-22 13:48:33,153 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-22 13:48:33,154 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-22 13:48:33,154 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 13:48:33,154 INFO L85 PathProgramCache]: Analyzing trace with hash 1557574075, now seen corresponding path program 1 times [2024-11-22 13:48:33,154 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 13:48:33,155 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [768951800] [2024-11-22 13:48:33,155 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 13:48:33,155 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 13:48:33,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 13:48:33,331 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-22 13:48:33,331 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 13:48:33,331 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [768951800] [2024-11-22 13:48:33,331 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [768951800] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-22 13:48:33,331 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-22 13:48:33,331 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-22 13:48:33,332 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [318950021] [2024-11-22 13:48:33,332 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-22 13:48:33,332 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-22 13:48:33,333 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 13:48:33,333 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-22 13:48:33,334 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-22 13:48:33,340 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 24 [2024-11-22 13:48:33,341 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 24 places, 23 transitions, 65 flow. Second operand has 5 states, 5 states have (on average 7.2) internal successors, (36), 5 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-22 13:48:33,341 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-22 13:48:33,341 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 24 [2024-11-22 13:48:33,341 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-22 13:48:33,458 INFO L124 PetriNetUnfolderBase]: 171/329 cut-off events. [2024-11-22 13:48:33,459 INFO L125 PetriNetUnfolderBase]: For 43/46 co-relation queries the response was YES. [2024-11-22 13:48:33,459 INFO L83 FinitePrefix]: Finished finitePrefix Result has 739 conditions, 329 events. 171/329 cut-off events. For 43/46 co-relation queries the response was YES. Maximal size of possible extension queue 32. Compared 1328 event pairs, 111 based on Foata normal form. 0/303 useless extension candidates. Maximal degree in co-relation 257. Up to 209 conditions per place. [2024-11-22 13:48:33,462 INFO L140 encePairwiseOnDemand]: 18/24 looper letters, 40 selfloop transitions, 5 changer transitions 0/47 dead transitions. [2024-11-22 13:48:33,463 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 28 places, 47 transitions, 220 flow [2024-11-22 13:48:33,463 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-22 13:48:33,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-22 13:48:33,464 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 62 transitions. [2024-11-22 13:48:33,464 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5166666666666667 [2024-11-22 13:48:33,465 INFO L175 Difference]: Start difference. First operand has 24 places, 23 transitions, 65 flow. Second operand 5 states and 62 transitions. [2024-11-22 13:48:33,465 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 28 places, 47 transitions, 220 flow [2024-11-22 13:48:33,466 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 27 places, 47 transitions, 215 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-22 13:48:33,467 INFO L231 Difference]: Finished difference. Result has 30 places, 27 transitions, 98 flow [2024-11-22 13:48:33,468 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=24, PETRI_DIFFERENCE_MINUEND_FLOW=62, PETRI_DIFFERENCE_MINUEND_PLACES=23, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=23, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=18, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=98, PETRI_PLACES=30, PETRI_TRANSITIONS=27} [2024-11-22 13:48:33,468 INFO L277 CegarLoopForPetriNet]: 25 programPoint places, 5 predicate places. [2024-11-22 13:48:33,469 INFO L471 AbstractCegarLoop]: Abstraction has has 30 places, 27 transitions, 98 flow [2024-11-22 13:48:33,469 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 7.2) internal successors, (36), 5 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-22 13:48:33,469 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-22 13:48:33,469 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-22 13:48:33,469 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-22 13:48:33,469 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-22 13:48:33,470 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 13:48:33,470 INFO L85 PathProgramCache]: Analyzing trace with hash -577907976, now seen corresponding path program 1 times [2024-11-22 13:48:33,470 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 13:48:33,470 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1994773746] [2024-11-22 13:48:33,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 13:48:33,470 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 13:48:33,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 13:48:33,561 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-22 13:48:33,562 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 13:48:33,562 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1994773746] [2024-11-22 13:48:33,562 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1994773746] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-22 13:48:33,562 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-22 13:48:33,562 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-22 13:48:33,563 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1905905539] [2024-11-22 13:48:33,563 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-22 13:48:33,563 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-22 13:48:33,563 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 13:48:33,564 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-22 13:48:33,564 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-22 13:48:33,569 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 24 [2024-11-22 13:48:33,569 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 30 places, 27 transitions, 98 flow. Second operand has 5 states, 5 states have (on average 7.2) internal successors, (36), 5 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-22 13:48:33,569 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-22 13:48:33,570 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 24 [2024-11-22 13:48:33,570 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-22 13:48:33,653 INFO L124 PetriNetUnfolderBase]: 138/264 cut-off events. [2024-11-22 13:48:33,654 INFO L125 PetriNetUnfolderBase]: For 100/114 co-relation queries the response was YES. [2024-11-22 13:48:33,655 INFO L83 FinitePrefix]: Finished finitePrefix Result has 664 conditions, 264 events. 138/264 cut-off events. For 100/114 co-relation queries the response was YES. Maximal size of possible extension queue 24. Compared 961 event pairs, 95 based on Foata normal form. 0/246 useless extension candidates. Maximal degree in co-relation 509. Up to 205 conditions per place. [2024-11-22 13:48:33,657 INFO L140 encePairwiseOnDemand]: 18/24 looper letters, 20 selfloop transitions, 2 changer transitions 15/39 dead transitions. [2024-11-22 13:48:33,658 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 34 places, 39 transitions, 209 flow [2024-11-22 13:48:33,658 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-22 13:48:33,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-22 13:48:33,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 56 transitions. [2024-11-22 13:48:33,659 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4666666666666667 [2024-11-22 13:48:33,660 INFO L175 Difference]: Start difference. First operand has 30 places, 27 transitions, 98 flow. Second operand 5 states and 56 transitions. [2024-11-22 13:48:33,660 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 34 places, 39 transitions, 209 flow [2024-11-22 13:48:33,661 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 33 places, 39 transitions, 205 flow, removed 1 selfloop flow, removed 1 redundant places. [2024-11-22 13:48:33,662 INFO L231 Difference]: Finished difference. Result has 35 places, 24 transitions, 86 flow [2024-11-22 13:48:33,662 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=24, PETRI_DIFFERENCE_MINUEND_FLOW=94, PETRI_DIFFERENCE_MINUEND_PLACES=29, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=27, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=86, PETRI_PLACES=35, PETRI_TRANSITIONS=24} [2024-11-22 13:48:33,663 INFO L277 CegarLoopForPetriNet]: 25 programPoint places, 10 predicate places. [2024-11-22 13:48:33,664 INFO L471 AbstractCegarLoop]: Abstraction has has 35 places, 24 transitions, 86 flow [2024-11-22 13:48:33,664 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 7.2) internal successors, (36), 5 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-22 13:48:33,664 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-22 13:48:33,664 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-22 13:48:33,664 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-11-22 13:48:33,664 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-22 13:48:33,664 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 13:48:33,665 INFO L85 PathProgramCache]: Analyzing trace with hash 182329702, now seen corresponding path program 1 times [2024-11-22 13:48:33,665 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 13:48:33,665 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1116434895] [2024-11-22 13:48:33,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 13:48:33,665 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 13:48:33,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 13:48:33,799 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-22 13:48:33,799 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 13:48:33,800 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1116434895] [2024-11-22 13:48:33,800 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1116434895] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-22 13:48:33,801 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1180548158] [2024-11-22 13:48:33,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 13:48:33,801 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 13:48:33,801 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-22 13:48:33,804 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) [2024-11-22 13:48:33,804 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-22 13:48:33,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 13:48:33,866 INFO L255 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-11-22 13:48:33,871 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-22 13:48:33,931 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-22 13:48:33,932 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-22 13:48:33,968 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-22 13:48:33,968 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1180548158] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-22 13:48:33,968 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-22 13:48:33,969 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 9 [2024-11-22 13:48:33,969 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [303966298] [2024-11-22 13:48:33,969 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-22 13:48:33,969 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-11-22 13:48:33,970 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 13:48:33,970 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-11-22 13:48:33,970 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2024-11-22 13:48:33,985 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 24 [2024-11-22 13:48:33,985 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 35 places, 24 transitions, 86 flow. Second operand has 10 states, 10 states have (on average 7.1) internal successors, (71), 10 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-22 13:48:33,985 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-22 13:48:33,985 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 24 [2024-11-22 13:48:33,985 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-22 13:48:34,079 INFO L124 PetriNetUnfolderBase]: 139/249 cut-off events. [2024-11-22 13:48:34,079 INFO L125 PetriNetUnfolderBase]: For 83/103 co-relation queries the response was YES. [2024-11-22 13:48:34,080 INFO L83 FinitePrefix]: Finished finitePrefix Result has 659 conditions, 249 events. 139/249 cut-off events. For 83/103 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 835 event pairs, 33 based on Foata normal form. 0/238 useless extension candidates. Maximal degree in co-relation 642. Up to 101 conditions per place. [2024-11-22 13:48:34,081 INFO L140 encePairwiseOnDemand]: 17/24 looper letters, 31 selfloop transitions, 7 changer transitions 0/40 dead transitions. [2024-11-22 13:48:34,081 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 37 places, 40 transitions, 214 flow [2024-11-22 13:48:34,082 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-22 13:48:34,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-11-22 13:48:34,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 64 transitions. [2024-11-22 13:48:34,083 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.38095238095238093 [2024-11-22 13:48:34,083 INFO L175 Difference]: Start difference. First operand has 35 places, 24 transitions, 86 flow. Second operand 7 states and 64 transitions. [2024-11-22 13:48:34,083 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 37 places, 40 transitions, 214 flow [2024-11-22 13:48:34,084 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 31 places, 40 transitions, 186 flow, removed 12 selfloop flow, removed 6 redundant places. [2024-11-22 13:48:34,084 INFO L231 Difference]: Finished difference. Result has 33 places, 26 transitions, 97 flow [2024-11-22 13:48:34,084 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=24, PETRI_DIFFERENCE_MINUEND_FLOW=68, PETRI_DIFFERENCE_MINUEND_PLACES=25, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=24, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=18, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=97, PETRI_PLACES=33, PETRI_TRANSITIONS=26} [2024-11-22 13:48:34,085 INFO L277 CegarLoopForPetriNet]: 25 programPoint places, 8 predicate places. [2024-11-22 13:48:34,085 INFO L471 AbstractCegarLoop]: Abstraction has has 33 places, 26 transitions, 97 flow [2024-11-22 13:48:34,085 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.1) internal successors, (71), 10 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-22 13:48:34,085 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-22 13:48:34,086 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-22 13:48:34,093 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2024-11-22 13:48:34,289 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 13:48:34,290 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-22 13:48:34,291 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 13:48:34,291 INFO L85 PathProgramCache]: Analyzing trace with hash -490579767, now seen corresponding path program 1 times [2024-11-22 13:48:34,291 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 13:48:34,291 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [985901565] [2024-11-22 13:48:34,291 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 13:48:34,291 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 13:48:34,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 13:48:34,362 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-22 13:48:34,362 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 13:48:34,362 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [985901565] [2024-11-22 13:48:34,362 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [985901565] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-22 13:48:34,362 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [74214054] [2024-11-22 13:48:34,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 13:48:34,363 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 13:48:34,363 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-22 13:48:34,365 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) [2024-11-22 13:48:34,370 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-22 13:48:34,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 13:48:34,421 INFO L255 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-11-22 13:48:34,422 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-22 13:48:34,449 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-22 13:48:34,449 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-22 13:48:34,475 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-22 13:48:34,476 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [74214054] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-22 13:48:34,476 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-11-22 13:48:34,476 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5, 4] total 9 [2024-11-22 13:48:34,476 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1062610135] [2024-11-22 13:48:34,476 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-22 13:48:34,477 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-22 13:48:34,477 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 13:48:34,477 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-22 13:48:34,477 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2024-11-22 13:48:34,482 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 24 [2024-11-22 13:48:34,482 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 33 places, 26 transitions, 97 flow. Second operand has 5 states, 5 states have (on average 7.2) internal successors, (36), 5 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-22 13:48:34,482 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-22 13:48:34,482 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 24 [2024-11-22 13:48:34,483 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-22 13:48:34,534 INFO L124 PetriNetUnfolderBase]: 136/254 cut-off events. [2024-11-22 13:48:34,535 INFO L125 PetriNetUnfolderBase]: For 114/114 co-relation queries the response was YES. [2024-11-22 13:48:34,535 INFO L83 FinitePrefix]: Finished finitePrefix Result has 671 conditions, 254 events. 136/254 cut-off events. For 114/114 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 814 event pairs, 43 based on Foata normal form. 0/240 useless extension candidates. Maximal degree in co-relation 649. Up to 130 conditions per place. [2024-11-22 13:48:34,536 INFO L140 encePairwiseOnDemand]: 18/24 looper letters, 28 selfloop transitions, 5 changer transitions 0/36 dead transitions. [2024-11-22 13:48:34,537 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 37 places, 36 transitions, 201 flow [2024-11-22 13:48:34,537 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-22 13:48:34,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-22 13:48:34,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 49 transitions. [2024-11-22 13:48:34,538 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4083333333333333 [2024-11-22 13:48:34,538 INFO L175 Difference]: Start difference. First operand has 33 places, 26 transitions, 97 flow. Second operand 5 states and 49 transitions. [2024-11-22 13:48:34,538 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 37 places, 36 transitions, 201 flow [2024-11-22 13:48:34,539 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 35 places, 36 transitions, 198 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-22 13:48:34,539 INFO L231 Difference]: Finished difference. Result has 37 places, 27 transitions, 117 flow [2024-11-22 13:48:34,539 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=24, PETRI_DIFFERENCE_MINUEND_FLOW=94, PETRI_DIFFERENCE_MINUEND_PLACES=31, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=26, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=117, PETRI_PLACES=37, PETRI_TRANSITIONS=27} [2024-11-22 13:48:34,540 INFO L277 CegarLoopForPetriNet]: 25 programPoint places, 12 predicate places. [2024-11-22 13:48:34,540 INFO L471 AbstractCegarLoop]: Abstraction has has 37 places, 27 transitions, 117 flow [2024-11-22 13:48:34,540 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 7.2) internal successors, (36), 5 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-22 13:48:34,540 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-22 13:48:34,541 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-22 13:48:34,548 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2024-11-22 13:48:34,741 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 13:48:34,742 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-22 13:48:34,742 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 13:48:34,742 INFO L85 PathProgramCache]: Analyzing trace with hash -1176065503, now seen corresponding path program 1 times [2024-11-22 13:48:34,742 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 13:48:34,743 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [500058893] [2024-11-22 13:48:34,743 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 13:48:34,743 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 13:48:34,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 13:48:35,073 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-22 13:48:35,074 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 13:48:35,074 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [500058893] [2024-11-22 13:48:35,074 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [500058893] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-22 13:48:35,074 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1057165809] [2024-11-22 13:48:35,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 13:48:35,074 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 13:48:35,074 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-22 13:48:35,077 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) [2024-11-22 13:48:35,084 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-22 13:48:35,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 13:48:35,134 INFO L255 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 15 conjuncts are in the unsatisfiable core [2024-11-22 13:48:35,135 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-22 13:48:35,177 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-22 13:48:35,178 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-22 13:48:35,219 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-22 13:48:35,220 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 21 treesize of output 14 [2024-11-22 13:48:35,251 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-22 13:48:35,251 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1057165809] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-22 13:48:35,251 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-22 13:48:35,251 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 5, 5] total 12 [2024-11-22 13:48:35,252 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [401939586] [2024-11-22 13:48:35,252 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-22 13:48:35,252 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-11-22 13:48:35,252 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 13:48:35,253 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-11-22 13:48:35,253 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2024-11-22 13:48:35,276 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 24 [2024-11-22 13:48:35,277 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 37 places, 27 transitions, 117 flow. Second operand has 13 states, 13 states have (on average 7.6923076923076925) internal successors, (100), 13 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-22 13:48:35,277 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-22 13:48:35,277 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 24 [2024-11-22 13:48:35,277 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-22 13:48:35,455 INFO L124 PetriNetUnfolderBase]: 172/341 cut-off events. [2024-11-22 13:48:35,455 INFO L125 PetriNetUnfolderBase]: For 269/269 co-relation queries the response was YES. [2024-11-22 13:48:35,456 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1025 conditions, 341 events. 172/341 cut-off events. For 269/269 co-relation queries the response was YES. Maximal size of possible extension queue 26. Compared 1329 event pairs, 29 based on Foata normal form. 2/342 useless extension candidates. Maximal degree in co-relation 1000. Up to 195 conditions per place. [2024-11-22 13:48:35,457 INFO L140 encePairwiseOnDemand]: 15/24 looper letters, 41 selfloop transitions, 23 changer transitions 2/71 dead transitions. [2024-11-22 13:48:35,457 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 71 transitions, 419 flow [2024-11-22 13:48:35,457 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-22 13:48:35,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-11-22 13:48:35,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 114 transitions. [2024-11-22 13:48:35,458 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.475 [2024-11-22 13:48:35,458 INFO L175 Difference]: Start difference. First operand has 37 places, 27 transitions, 117 flow. Second operand 10 states and 114 transitions. [2024-11-22 13:48:35,459 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 71 transitions, 419 flow [2024-11-22 13:48:35,460 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 43 places, 71 transitions, 408 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-11-22 13:48:35,461 INFO L231 Difference]: Finished difference. Result has 48 places, 46 transitions, 288 flow [2024-11-22 13:48:35,461 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=24, PETRI_DIFFERENCE_MINUEND_FLOW=111, PETRI_DIFFERENCE_MINUEND_PLACES=34, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=27, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=17, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=288, PETRI_PLACES=48, PETRI_TRANSITIONS=46} [2024-11-22 13:48:35,461 INFO L277 CegarLoopForPetriNet]: 25 programPoint places, 23 predicate places. [2024-11-22 13:48:35,461 INFO L471 AbstractCegarLoop]: Abstraction has has 48 places, 46 transitions, 288 flow [2024-11-22 13:48:35,462 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 7.6923076923076925) internal successors, (100), 13 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-22 13:48:35,462 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-22 13:48:35,462 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-22 13:48:35,468 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2024-11-22 13:48:35,666 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 13:48:35,667 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-22 13:48:35,667 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 13:48:35,668 INFO L85 PathProgramCache]: Analyzing trace with hash -1605095481, now seen corresponding path program 2 times [2024-11-22 13:48:35,668 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 13:48:35,668 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1014475701] [2024-11-22 13:48:35,668 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-22 13:48:35,668 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 13:48:35,690 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-22 13:48:35,690 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-22 13:48:35,892 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-22 13:48:35,892 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 13:48:35,892 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1014475701] [2024-11-22 13:48:35,892 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1014475701] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-22 13:48:35,892 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [993973173] [2024-11-22 13:48:35,892 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-22 13:48:35,892 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 13:48:35,893 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-22 13:48:35,895 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) [2024-11-22 13:48:35,896 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-22 13:48:35,948 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-22 13:48:35,948 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-22 13:48:35,949 INFO L255 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 15 conjuncts are in the unsatisfiable core [2024-11-22 13:48:35,950 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-22 13:48:36,017 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-22 13:48:36,018 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-22 13:48:36,043 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-22 13:48:36,043 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 21 treesize of output 14 [2024-11-22 13:48:36,082 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-22 13:48:36,082 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [993973173] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-22 13:48:36,082 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-22 13:48:36,082 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 5, 5] total 14 [2024-11-22 13:48:36,083 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1884928250] [2024-11-22 13:48:36,083 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-22 13:48:36,083 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-11-22 13:48:36,083 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 13:48:36,084 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-11-22 13:48:36,084 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=158, Unknown=0, NotChecked=0, Total=210 [2024-11-22 13:48:36,125 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 24 [2024-11-22 13:48:36,125 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 48 places, 46 transitions, 288 flow. Second operand has 15 states, 15 states have (on average 7.466666666666667) internal successors, (112), 15 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-22 13:48:36,125 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-22 13:48:36,125 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 24 [2024-11-22 13:48:36,125 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-22 13:48:36,310 INFO L124 PetriNetUnfolderBase]: 212/424 cut-off events. [2024-11-22 13:48:36,310 INFO L125 PetriNetUnfolderBase]: For 719/723 co-relation queries the response was YES. [2024-11-22 13:48:36,311 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1517 conditions, 424 events. 212/424 cut-off events. For 719/723 co-relation queries the response was YES. Maximal size of possible extension queue 36. Compared 1843 event pairs, 37 based on Foata normal form. 5/427 useless extension candidates. Maximal degree in co-relation 1486. Up to 208 conditions per place. [2024-11-22 13:48:36,313 INFO L140 encePairwiseOnDemand]: 15/24 looper letters, 36 selfloop transitions, 39 changer transitions 1/81 dead transitions. [2024-11-22 13:48:36,313 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 81 transitions, 610 flow [2024-11-22 13:48:36,313 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-22 13:48:36,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-11-22 13:48:36,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 103 transitions. [2024-11-22 13:48:36,313 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.47685185185185186 [2024-11-22 13:48:36,313 INFO L175 Difference]: Start difference. First operand has 48 places, 46 transitions, 288 flow. Second operand 9 states and 103 transitions. [2024-11-22 13:48:36,314 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 81 transitions, 610 flow [2024-11-22 13:48:36,316 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 81 transitions, 578 flow, removed 15 selfloop flow, removed 1 redundant places. [2024-11-22 13:48:36,317 INFO L231 Difference]: Finished difference. Result has 56 places, 62 transitions, 475 flow [2024-11-22 13:48:36,317 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=24, PETRI_DIFFERENCE_MINUEND_FLOW=270, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=18, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=475, PETRI_PLACES=56, PETRI_TRANSITIONS=62} [2024-11-22 13:48:36,317 INFO L277 CegarLoopForPetriNet]: 25 programPoint places, 31 predicate places. [2024-11-22 13:48:36,317 INFO L471 AbstractCegarLoop]: Abstraction has has 56 places, 62 transitions, 475 flow [2024-11-22 13:48:36,318 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 7.466666666666667) internal successors, (112), 15 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-22 13:48:36,318 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-22 13:48:36,318 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-22 13:48:36,328 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-11-22 13:48:36,521 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 13:48:36,522 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-22 13:48:36,522 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 13:48:36,522 INFO L85 PathProgramCache]: Analyzing trace with hash -640245501, now seen corresponding path program 3 times [2024-11-22 13:48:36,522 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 13:48:36,523 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [588531878] [2024-11-22 13:48:36,523 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-22 13:48:36,523 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 13:48:36,535 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-11-22 13:48:36,535 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-22 13:48:36,810 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-22 13:48:36,810 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 13:48:36,810 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [588531878] [2024-11-22 13:48:36,810 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [588531878] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-22 13:48:36,810 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1733404470] [2024-11-22 13:48:36,811 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-22 13:48:36,811 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 13:48:36,811 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-22 13:48:36,813 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) [2024-11-22 13:48:36,814 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-22 13:48:36,865 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-11-22 13:48:36,866 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-22 13:48:36,867 INFO L255 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 15 conjuncts are in the unsatisfiable core [2024-11-22 13:48:36,868 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-22 13:48:36,914 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-22 13:48:36,915 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-22 13:48:36,938 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-22 13:48:36,938 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 17 treesize of output 14 [2024-11-22 13:48:36,949 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-22 13:48:36,949 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1733404470] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-22 13:48:36,950 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-22 13:48:36,950 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 5, 5] total 13 [2024-11-22 13:48:36,950 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [461430488] [2024-11-22 13:48:36,950 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-22 13:48:36,950 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-11-22 13:48:36,951 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 13:48:36,951 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-11-22 13:48:36,951 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2024-11-22 13:48:36,974 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 24 [2024-11-22 13:48:36,975 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 62 transitions, 475 flow. Second operand has 14 states, 14 states have (on average 7.428571428571429) internal successors, (104), 14 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-22 13:48:36,975 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-22 13:48:36,975 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 24 [2024-11-22 13:48:36,975 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-22 13:48:37,203 INFO L124 PetriNetUnfolderBase]: 268/537 cut-off events. [2024-11-22 13:48:37,204 INFO L125 PetriNetUnfolderBase]: For 1170/1178 co-relation queries the response was YES. [2024-11-22 13:48:37,205 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2072 conditions, 537 events. 268/537 cut-off events. For 1170/1178 co-relation queries the response was YES. Maximal size of possible extension queue 49. Compared 2543 event pairs, 37 based on Foata normal form. 9/542 useless extension candidates. Maximal degree in co-relation 2038. Up to 223 conditions per place. [2024-11-22 13:48:37,207 INFO L140 encePairwiseOnDemand]: 15/24 looper letters, 44 selfloop transitions, 55 changer transitions 1/105 dead transitions. [2024-11-22 13:48:37,207 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 105 transitions, 878 flow [2024-11-22 13:48:37,207 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-11-22 13:48:37,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-11-22 13:48:37,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 125 transitions. [2024-11-22 13:48:37,208 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4734848484848485 [2024-11-22 13:48:37,208 INFO L175 Difference]: Start difference. First operand has 56 places, 62 transitions, 475 flow. Second operand 11 states and 125 transitions. [2024-11-22 13:48:37,208 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 105 transitions, 878 flow [2024-11-22 13:48:37,212 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 105 transitions, 815 flow, removed 29 selfloop flow, removed 2 redundant places. [2024-11-22 13:48:37,213 INFO L231 Difference]: Finished difference. Result has 65 places, 78 transitions, 679 flow [2024-11-22 13:48:37,213 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=24, PETRI_DIFFERENCE_MINUEND_FLOW=448, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=62, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=18, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=679, PETRI_PLACES=65, PETRI_TRANSITIONS=78} [2024-11-22 13:48:37,214 INFO L277 CegarLoopForPetriNet]: 25 programPoint places, 40 predicate places. [2024-11-22 13:48:37,214 INFO L471 AbstractCegarLoop]: Abstraction has has 65 places, 78 transitions, 679 flow [2024-11-22 13:48:37,214 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 7.428571428571429) internal successors, (104), 14 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-22 13:48:37,214 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-22 13:48:37,214 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-22 13:48:37,222 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-11-22 13:48:37,416 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 13:48:37,417 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-22 13:48:37,418 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 13:48:37,418 INFO L85 PathProgramCache]: Analyzing trace with hash -433954945, now seen corresponding path program 4 times [2024-11-22 13:48:37,418 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 13:48:37,418 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1860670647] [2024-11-22 13:48:37,418 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-22 13:48:37,418 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 13:48:37,430 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-22 13:48:37,430 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-22 13:48:37,609 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-22 13:48:37,609 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 13:48:37,609 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1860670647] [2024-11-22 13:48:37,609 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1860670647] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-22 13:48:37,610 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1065940770] [2024-11-22 13:48:37,610 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-22 13:48:37,610 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 13:48:37,610 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-22 13:48:37,613 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) [2024-11-22 13:48:37,614 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-11-22 13:48:37,661 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-22 13:48:37,661 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-22 13:48:37,662 INFO L255 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 15 conjuncts are in the unsatisfiable core [2024-11-22 13:48:37,663 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-22 13:48:37,721 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-22 13:48:37,722 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-22 13:48:37,751 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-22 13:48:37,751 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 21 treesize of output 14 [2024-11-22 13:48:37,772 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-22 13:48:37,773 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1065940770] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-22 13:48:37,773 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-22 13:48:37,773 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 5, 5] total 13 [2024-11-22 13:48:37,773 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1432160364] [2024-11-22 13:48:37,773 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-22 13:48:37,774 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-11-22 13:48:37,774 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 13:48:37,774 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-11-22 13:48:37,774 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2024-11-22 13:48:37,794 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 24 [2024-11-22 13:48:37,795 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 78 transitions, 679 flow. Second operand has 14 states, 14 states have (on average 7.428571428571429) internal successors, (104), 14 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-22 13:48:37,795 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-22 13:48:37,795 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 24 [2024-11-22 13:48:37,795 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-22 13:48:37,967 INFO L124 PetriNetUnfolderBase]: 307/612 cut-off events. [2024-11-22 13:48:37,968 INFO L125 PetriNetUnfolderBase]: For 1570/1576 co-relation queries the response was YES. [2024-11-22 13:48:37,969 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2448 conditions, 612 events. 307/612 cut-off events. For 1570/1576 co-relation queries the response was YES. Maximal size of possible extension queue 57. Compared 3073 event pairs, 60 based on Foata normal form. 5/613 useless extension candidates. Maximal degree in co-relation 2412. Up to 457 conditions per place. [2024-11-22 13:48:37,972 INFO L140 encePairwiseOnDemand]: 15/24 looper letters, 77 selfloop transitions, 21 changer transitions 1/104 dead transitions. [2024-11-22 13:48:37,972 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 104 transitions, 1003 flow [2024-11-22 13:48:37,972 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-22 13:48:37,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-11-22 13:48:37,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 91 transitions. [2024-11-22 13:48:37,973 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4739583333333333 [2024-11-22 13:48:37,973 INFO L175 Difference]: Start difference. First operand has 65 places, 78 transitions, 679 flow. Second operand 8 states and 91 transitions. [2024-11-22 13:48:37,973 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 104 transitions, 1003 flow [2024-11-22 13:48:37,999 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 104 transitions, 963 flow, removed 19 selfloop flow, removed 1 redundant places. [2024-11-22 13:48:38,001 INFO L231 Difference]: Finished difference. Result has 74 places, 88 transitions, 786 flow [2024-11-22 13:48:38,001 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=24, PETRI_DIFFERENCE_MINUEND_FLOW=661, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=78, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=786, PETRI_PLACES=74, PETRI_TRANSITIONS=88} [2024-11-22 13:48:38,001 INFO L277 CegarLoopForPetriNet]: 25 programPoint places, 49 predicate places. [2024-11-22 13:48:38,002 INFO L471 AbstractCegarLoop]: Abstraction has has 74 places, 88 transitions, 786 flow [2024-11-22 13:48:38,002 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 7.428571428571429) internal successors, (104), 14 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-22 13:48:38,002 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-22 13:48:38,002 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-22 13:48:38,012 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-11-22 13:48:38,206 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 13:48:38,207 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-22 13:48:38,207 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 13:48:38,208 INFO L85 PathProgramCache]: Analyzing trace with hash -693469303, now seen corresponding path program 5 times [2024-11-22 13:48:38,208 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 13:48:38,208 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1937390560] [2024-11-22 13:48:38,208 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-22 13:48:38,208 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 13:48:38,222 INFO L227 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-22 13:48:38,222 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-22 13:48:38,439 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-22 13:48:38,440 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 13:48:38,440 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1937390560] [2024-11-22 13:48:38,440 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1937390560] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-22 13:48:38,440 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1727018723] [2024-11-22 13:48:38,440 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-22 13:48:38,440 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 13:48:38,440 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-22 13:48:38,442 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-22 13:48:38,443 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-11-22 13:48:38,494 INFO L227 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-22 13:48:38,494 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-22 13:48:38,495 INFO L255 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 17 conjuncts are in the unsatisfiable core [2024-11-22 13:48:38,496 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-22 13:48:38,558 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-22 13:48:38,558 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-22 13:48:38,576 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-22 13:48:38,577 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 21 treesize of output 14 [2024-11-22 13:48:38,601 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-22 13:48:38,601 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1727018723] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-22 13:48:38,601 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-22 13:48:38,601 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 5, 5] total 12 [2024-11-22 13:48:38,601 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1345592491] [2024-11-22 13:48:38,602 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-22 13:48:38,602 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-11-22 13:48:38,602 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 13:48:38,602 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-11-22 13:48:38,603 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2024-11-22 13:48:38,638 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 24 [2024-11-22 13:48:38,638 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 88 transitions, 786 flow. Second operand has 13 states, 13 states have (on average 7.461538461538462) internal successors, (97), 13 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-22 13:48:38,638 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-22 13:48:38,638 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 24 [2024-11-22 13:48:38,638 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-22 13:48:38,855 INFO L124 PetriNetUnfolderBase]: 346/693 cut-off events. [2024-11-22 13:48:38,855 INFO L125 PetriNetUnfolderBase]: For 1981/1985 co-relation queries the response was YES. [2024-11-22 13:48:38,856 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2802 conditions, 693 events. 346/693 cut-off events. For 1981/1985 co-relation queries the response was YES. Maximal size of possible extension queue 66. Compared 3626 event pairs, 66 based on Foata normal form. 5/697 useless extension candidates. Maximal degree in co-relation 2761. Up to 522 conditions per place. [2024-11-22 13:48:38,860 INFO L140 encePairwiseOnDemand]: 16/24 looper letters, 85 selfloop transitions, 16 changer transitions 1/107 dead transitions. [2024-11-22 13:48:38,860 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 107 transitions, 1080 flow [2024-11-22 13:48:38,860 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-22 13:48:38,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-11-22 13:48:38,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 92 transitions. [2024-11-22 13:48:38,861 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.42592592592592593 [2024-11-22 13:48:38,861 INFO L175 Difference]: Start difference. First operand has 74 places, 88 transitions, 786 flow. Second operand 9 states and 92 transitions. [2024-11-22 13:48:38,861 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 107 transitions, 1080 flow [2024-11-22 13:48:38,887 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 81 places, 107 transitions, 1070 flow, removed 4 selfloop flow, removed 1 redundant places. [2024-11-22 13:48:38,889 INFO L231 Difference]: Finished difference. Result has 82 places, 92 transitions, 841 flow [2024-11-22 13:48:38,889 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=24, PETRI_DIFFERENCE_MINUEND_FLOW=776, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=88, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=74, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=841, PETRI_PLACES=82, PETRI_TRANSITIONS=92} [2024-11-22 13:48:38,889 INFO L277 CegarLoopForPetriNet]: 25 programPoint places, 57 predicate places. [2024-11-22 13:48:38,889 INFO L471 AbstractCegarLoop]: Abstraction has has 82 places, 92 transitions, 841 flow [2024-11-22 13:48:38,890 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 7.461538461538462) internal successors, (97), 13 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-22 13:48:38,890 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-22 13:48:38,890 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-22 13:48:38,897 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2024-11-22 13:48:39,094 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 13:48:39,095 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-22 13:48:39,096 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 13:48:39,096 INFO L85 PathProgramCache]: Analyzing trace with hash -1682150123, now seen corresponding path program 6 times [2024-11-22 13:48:39,096 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 13:48:39,096 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1605874102] [2024-11-22 13:48:39,096 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-22 13:48:39,096 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 13:48:39,106 INFO L227 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2024-11-22 13:48:39,106 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-22 13:48:39,332 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-22 13:48:39,332 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 13:48:39,332 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1605874102] [2024-11-22 13:48:39,333 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1605874102] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-22 13:48:39,336 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1329965459] [2024-11-22 13:48:39,336 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-22 13:48:39,336 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 13:48:39,336 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-22 13:48:39,338 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-22 13:48:39,339 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-11-22 13:48:39,390 INFO L227 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2024-11-22 13:48:39,391 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-22 13:48:39,392 INFO L255 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 15 conjuncts are in the unsatisfiable core [2024-11-22 13:48:39,393 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-22 13:48:39,467 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-22 13:48:39,467 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-22 13:48:39,520 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-22 13:48:39,521 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 17 treesize of output 14 [2024-11-22 13:48:39,547 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-22 13:48:39,547 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1329965459] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-22 13:48:39,547 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-22 13:48:39,548 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 5, 5] total 12 [2024-11-22 13:48:39,548 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [474800548] [2024-11-22 13:48:39,548 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-22 13:48:39,548 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-11-22 13:48:39,548 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 13:48:39,548 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-11-22 13:48:39,549 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2024-11-22 13:48:39,608 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 24 [2024-11-22 13:48:39,608 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 82 places, 92 transitions, 841 flow. Second operand has 13 states, 13 states have (on average 7.461538461538462) internal successors, (97), 13 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-22 13:48:39,608 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-22 13:48:39,608 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 24 [2024-11-22 13:48:39,608 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-22 13:48:39,902 INFO L124 PetriNetUnfolderBase]: 408/813 cut-off events. [2024-11-22 13:48:39,902 INFO L125 PetriNetUnfolderBase]: For 2541/2545 co-relation queries the response was YES. [2024-11-22 13:48:39,903 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3353 conditions, 813 events. 408/813 cut-off events. For 2541/2545 co-relation queries the response was YES. Maximal size of possible extension queue 78. Compared 4375 event pairs, 63 based on Foata normal form. 2/811 useless extension candidates. Maximal degree in co-relation 3308. Up to 576 conditions per place. [2024-11-22 13:48:39,906 INFO L140 encePairwiseOnDemand]: 15/24 looper letters, 92 selfloop transitions, 32 changer transitions 2/131 dead transitions. [2024-11-22 13:48:39,906 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 92 places, 131 transitions, 1317 flow [2024-11-22 13:48:39,906 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-11-22 13:48:39,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-11-22 13:48:39,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 120 transitions. [2024-11-22 13:48:39,907 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.45454545454545453 [2024-11-22 13:48:39,907 INFO L175 Difference]: Start difference. First operand has 82 places, 92 transitions, 841 flow. Second operand 11 states and 120 transitions. [2024-11-22 13:48:39,907 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 92 places, 131 transitions, 1317 flow [2024-11-22 13:48:39,911 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 89 places, 131 transitions, 1300 flow, removed 3 selfloop flow, removed 3 redundant places. [2024-11-22 13:48:39,913 INFO L231 Difference]: Finished difference. Result has 91 places, 107 transitions, 1045 flow [2024-11-22 13:48:39,913 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=24, PETRI_DIFFERENCE_MINUEND_FLOW=826, PETRI_DIFFERENCE_MINUEND_PLACES=79, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=92, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=71, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=1045, PETRI_PLACES=91, PETRI_TRANSITIONS=107} [2024-11-22 13:48:39,913 INFO L277 CegarLoopForPetriNet]: 25 programPoint places, 66 predicate places. [2024-11-22 13:48:39,914 INFO L471 AbstractCegarLoop]: Abstraction has has 91 places, 107 transitions, 1045 flow [2024-11-22 13:48:39,914 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 7.461538461538462) internal successors, (97), 13 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-22 13:48:39,914 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-22 13:48:39,914 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-22 13:48:39,920 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2024-11-22 13:48:40,114 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2024-11-22 13:48:40,115 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-22 13:48:40,115 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 13:48:40,115 INFO L85 PathProgramCache]: Analyzing trace with hash -1513182553, now seen corresponding path program 7 times [2024-11-22 13:48:40,115 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 13:48:40,115 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [480320941] [2024-11-22 13:48:40,116 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-22 13:48:40,116 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 13:48:40,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 13:48:40,186 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-22 13:48:40,186 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 13:48:40,186 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [480320941] [2024-11-22 13:48:40,186 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [480320941] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-22 13:48:40,186 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [134189805] [2024-11-22 13:48:40,186 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-22 13:48:40,186 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 13:48:40,186 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-22 13:48:40,190 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-22 13:48:40,192 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-11-22 13:48:40,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 13:48:40,246 INFO L255 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-22 13:48:40,247 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-22 13:48:40,311 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-22 13:48:40,312 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-22 13:48:40,356 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-22 13:48:40,356 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [134189805] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-22 13:48:40,356 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-22 13:48:40,356 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 13 [2024-11-22 13:48:40,357 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1679121877] [2024-11-22 13:48:40,357 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-22 13:48:40,357 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-11-22 13:48:40,357 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 13:48:40,358 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-11-22 13:48:40,358 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=127, Unknown=0, NotChecked=0, Total=182 [2024-11-22 13:48:40,374 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 24 [2024-11-22 13:48:40,374 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 91 places, 107 transitions, 1045 flow. Second operand has 14 states, 14 states have (on average 6.928571428571429) internal successors, (97), 14 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-22 13:48:40,374 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-22 13:48:40,374 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 24 [2024-11-22 13:48:40,375 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-22 13:48:40,601 INFO L124 PetriNetUnfolderBase]: 905/1735 cut-off events. [2024-11-22 13:48:40,602 INFO L125 PetriNetUnfolderBase]: For 6466/6470 co-relation queries the response was YES. [2024-11-22 13:48:40,606 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7433 conditions, 1735 events. 905/1735 cut-off events. For 6466/6470 co-relation queries the response was YES. Maximal size of possible extension queue 141. Compared 10563 event pairs, 404 based on Foata normal form. 66/1801 useless extension candidates. Maximal degree in co-relation 7027. Up to 945 conditions per place. [2024-11-22 13:48:40,651 INFO L140 encePairwiseOnDemand]: 17/24 looper letters, 201 selfloop transitions, 22 changer transitions 0/226 dead transitions. [2024-11-22 13:48:40,652 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 97 places, 226 transitions, 2662 flow [2024-11-22 13:48:40,652 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-22 13:48:40,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-11-22 13:48:40,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 81 transitions. [2024-11-22 13:48:40,653 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.48214285714285715 [2024-11-22 13:48:40,653 INFO L175 Difference]: Start difference. First operand has 91 places, 107 transitions, 1045 flow. Second operand 7 states and 81 transitions. [2024-11-22 13:48:40,653 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 97 places, 226 transitions, 2662 flow [2024-11-22 13:48:40,662 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 95 places, 226 transitions, 2539 flow, removed 59 selfloop flow, removed 2 redundant places. [2024-11-22 13:48:40,664 INFO L231 Difference]: Finished difference. Result has 99 places, 127 transitions, 1321 flow [2024-11-22 13:48:40,664 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=24, PETRI_DIFFERENCE_MINUEND_FLOW=989, PETRI_DIFFERENCE_MINUEND_PLACES=89, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=107, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=85, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1321, PETRI_PLACES=99, PETRI_TRANSITIONS=127} [2024-11-22 13:48:40,665 INFO L277 CegarLoopForPetriNet]: 25 programPoint places, 74 predicate places. [2024-11-22 13:48:40,665 INFO L471 AbstractCegarLoop]: Abstraction has has 99 places, 127 transitions, 1321 flow [2024-11-22 13:48:40,665 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 6.928571428571429) internal successors, (97), 14 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-22 13:48:40,665 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-22 13:48:40,665 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-22 13:48:40,672 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2024-11-22 13:48:40,866 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 13:48:40,866 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-22 13:48:40,867 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 13:48:40,867 INFO L85 PathProgramCache]: Analyzing trace with hash -1186603380, now seen corresponding path program 8 times [2024-11-22 13:48:40,867 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 13:48:40,867 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [332869736] [2024-11-22 13:48:40,867 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-22 13:48:40,868 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 13:48:40,877 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-22 13:48:40,877 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-22 13:48:40,971 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-22 13:48:40,972 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 13:48:40,972 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [332869736] [2024-11-22 13:48:40,972 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [332869736] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-22 13:48:40,972 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [153517367] [2024-11-22 13:48:40,972 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-22 13:48:40,972 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 13:48:40,972 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-22 13:48:40,974 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-22 13:48:40,975 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-11-22 13:48:41,026 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-22 13:48:41,026 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-22 13:48:41,028 INFO L255 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-22 13:48:41,029 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-22 13:48:41,125 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-22 13:48:41,125 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-22 13:48:41,201 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-22 13:48:41,201 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [153517367] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-22 13:48:41,201 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-22 13:48:41,201 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 13 [2024-11-22 13:48:41,201 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [179625939] [2024-11-22 13:48:41,201 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-22 13:48:41,202 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-11-22 13:48:41,202 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 13:48:41,202 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-11-22 13:48:41,202 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=127, Unknown=0, NotChecked=0, Total=182 [2024-11-22 13:48:41,229 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 24 [2024-11-22 13:48:41,230 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 99 places, 127 transitions, 1321 flow. Second operand has 14 states, 14 states have (on average 6.642857142857143) internal successors, (93), 14 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-22 13:48:41,230 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-22 13:48:41,230 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 24 [2024-11-22 13:48:41,230 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-22 13:48:41,430 INFO L124 PetriNetUnfolderBase]: 800/1536 cut-off events. [2024-11-22 13:48:41,430 INFO L125 PetriNetUnfolderBase]: For 6117/6167 co-relation queries the response was YES. [2024-11-22 13:48:41,434 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6917 conditions, 1536 events. 800/1536 cut-off events. For 6117/6167 co-relation queries the response was YES. Maximal size of possible extension queue 116. Compared 9052 event pairs, 405 based on Foata normal form. 62/1597 useless extension candidates. Maximal degree in co-relation 6524. Up to 969 conditions per place. [2024-11-22 13:48:41,439 INFO L140 encePairwiseOnDemand]: 17/24 looper letters, 102 selfloop transitions, 3 changer transitions 76/184 dead transitions. [2024-11-22 13:48:41,439 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 105 places, 184 transitions, 2216 flow [2024-11-22 13:48:41,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-22 13:48:41,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-11-22 13:48:41,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 78 transitions. [2024-11-22 13:48:41,440 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4642857142857143 [2024-11-22 13:48:41,440 INFO L175 Difference]: Start difference. First operand has 99 places, 127 transitions, 1321 flow. Second operand 7 states and 78 transitions. [2024-11-22 13:48:41,440 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 105 places, 184 transitions, 2216 flow [2024-11-22 13:48:41,451 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 103 places, 184 transitions, 2200 flow, removed 6 selfloop flow, removed 2 redundant places. [2024-11-22 13:48:41,454 INFO L231 Difference]: Finished difference. Result has 106 places, 108 transitions, 1079 flow [2024-11-22 13:48:41,454 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=24, PETRI_DIFFERENCE_MINUEND_FLOW=1294, PETRI_DIFFERENCE_MINUEND_PLACES=97, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=126, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=123, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1079, PETRI_PLACES=106, PETRI_TRANSITIONS=108} [2024-11-22 13:48:41,454 INFO L277 CegarLoopForPetriNet]: 25 programPoint places, 81 predicate places. [2024-11-22 13:48:41,454 INFO L471 AbstractCegarLoop]: Abstraction has has 106 places, 108 transitions, 1079 flow [2024-11-22 13:48:41,455 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 6.642857142857143) internal successors, (93), 14 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-22 13:48:41,455 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-22 13:48:41,455 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] [2024-11-22 13:48:41,462 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2024-11-22 13:48:41,655 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2024-11-22 13:48:41,656 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-22 13:48:41,656 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 13:48:41,656 INFO L85 PathProgramCache]: Analyzing trace with hash 1092073402, now seen corresponding path program 9 times [2024-11-22 13:48:41,656 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 13:48:41,656 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [262200997] [2024-11-22 13:48:41,657 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-22 13:48:41,657 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 13:48:41,682 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-11-22 13:48:41,682 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-22 13:48:41,758 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-22 13:48:41,758 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 13:48:41,758 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [262200997] [2024-11-22 13:48:41,758 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [262200997] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-22 13:48:41,759 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1715569943] [2024-11-22 13:48:41,759 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-22 13:48:41,759 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 13:48:41,759 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-22 13:48:41,761 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-22 13:48:41,762 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-11-22 13:48:41,815 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-11-22 13:48:41,816 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-22 13:48:41,817 INFO L255 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-22 13:48:41,818 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-22 13:48:41,884 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-22 13:48:41,885 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-22 13:48:41,957 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-22 13:48:41,958 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1715569943] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-22 13:48:41,958 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-22 13:48:41,958 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 14 [2024-11-22 13:48:41,958 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [948039] [2024-11-22 13:48:41,958 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-22 13:48:41,959 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-11-22 13:48:41,959 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 13:48:41,959 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-11-22 13:48:41,959 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=149, Unknown=0, NotChecked=0, Total=210 [2024-11-22 13:48:41,985 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 24 [2024-11-22 13:48:41,986 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 106 places, 108 transitions, 1079 flow. Second operand has 15 states, 15 states have (on average 6.4) internal successors, (96), 15 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-22 13:48:41,986 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-22 13:48:41,986 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 24 [2024-11-22 13:48:41,986 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-22 13:48:42,170 INFO L124 PetriNetUnfolderBase]: 509/921 cut-off events. [2024-11-22 13:48:42,171 INFO L125 PetriNetUnfolderBase]: For 3914/3960 co-relation queries the response was YES. [2024-11-22 13:48:42,172 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4413 conditions, 921 events. 509/921 cut-off events. For 3914/3960 co-relation queries the response was YES. Maximal size of possible extension queue 70. Compared 4470 event pairs, 84 based on Foata normal form. 69/989 useless extension candidates. Maximal degree in co-relation 4366. Up to 414 conditions per place. [2024-11-22 13:48:42,176 INFO L140 encePairwiseOnDemand]: 17/24 looper letters, 103 selfloop transitions, 25 changer transitions 0/131 dead transitions. [2024-11-22 13:48:42,176 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 108 places, 131 transitions, 1505 flow [2024-11-22 13:48:42,176 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-22 13:48:42,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-11-22 13:48:42,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 82 transitions. [2024-11-22 13:48:42,177 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.37962962962962965 [2024-11-22 13:48:42,177 INFO L175 Difference]: Start difference. First operand has 106 places, 108 transitions, 1079 flow. Second operand 9 states and 82 transitions. [2024-11-22 13:48:42,177 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 108 places, 131 transitions, 1505 flow [2024-11-22 13:48:42,185 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 94 places, 131 transitions, 1350 flow, removed 54 selfloop flow, removed 14 redundant places. [2024-11-22 13:48:42,189 INFO L231 Difference]: Finished difference. Result has 96 places, 110 transitions, 1031 flow [2024-11-22 13:48:42,190 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=24, PETRI_DIFFERENCE_MINUEND_FLOW=944, PETRI_DIFFERENCE_MINUEND_PLACES=86, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=108, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=84, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1031, PETRI_PLACES=96, PETRI_TRANSITIONS=110} [2024-11-22 13:48:42,190 INFO L277 CegarLoopForPetriNet]: 25 programPoint places, 71 predicate places. [2024-11-22 13:48:42,190 INFO L471 AbstractCegarLoop]: Abstraction has has 96 places, 110 transitions, 1031 flow [2024-11-22 13:48:42,190 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 6.4) internal successors, (96), 15 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-22 13:48:42,191 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-22 13:48:42,191 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] [2024-11-22 13:48:42,198 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2024-11-22 13:48:42,394 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2024-11-22 13:48:42,395 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-22 13:48:42,395 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 13:48:42,396 INFO L85 PathProgramCache]: Analyzing trace with hash 282254261, now seen corresponding path program 10 times [2024-11-22 13:48:42,396 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 13:48:42,396 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1269760031] [2024-11-22 13:48:42,396 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-22 13:48:42,396 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 13:48:42,403 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-22 13:48:42,403 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-22 13:48:42,430 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-22 13:48:42,430 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 13:48:42,430 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1269760031] [2024-11-22 13:48:42,430 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1269760031] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-22 13:48:42,430 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1876316954] [2024-11-22 13:48:42,431 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-22 13:48:42,431 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 13:48:42,431 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-22 13:48:42,434 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-22 13:48:42,435 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-11-22 13:48:42,480 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-22 13:48:42,480 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-22 13:48:42,480 INFO L255 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-11-22 13:48:42,481 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-22 13:48:42,510 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-22 13:48:42,511 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-22 13:48:42,531 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-22 13:48:42,532 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1876316954] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-22 13:48:42,532 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-22 13:48:42,532 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 9 [2024-11-22 13:48:42,532 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2121701659] [2024-11-22 13:48:42,532 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-22 13:48:42,532 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-11-22 13:48:42,533 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 13:48:42,533 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-11-22 13:48:42,533 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-11-22 13:48:42,541 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 24 [2024-11-22 13:48:42,541 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 96 places, 110 transitions, 1031 flow. Second operand has 9 states, 9 states have (on average 6.111111111111111) internal successors, (55), 9 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-22 13:48:42,541 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-22 13:48:42,541 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 24 [2024-11-22 13:48:42,542 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-22 13:48:42,768 INFO L124 PetriNetUnfolderBase]: 800/1374 cut-off events. [2024-11-22 13:48:42,768 INFO L125 PetriNetUnfolderBase]: For 5099/5099 co-relation queries the response was YES. [2024-11-22 13:48:42,771 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6045 conditions, 1374 events. 800/1374 cut-off events. For 5099/5099 co-relation queries the response was YES. Maximal size of possible extension queue 80. Compared 6561 event pairs, 195 based on Foata normal form. 3/1377 useless extension candidates. Maximal degree in co-relation 5991. Up to 459 conditions per place. [2024-11-22 13:48:42,775 INFO L140 encePairwiseOnDemand]: 18/24 looper letters, 152 selfloop transitions, 19 changer transitions 10/182 dead transitions. [2024-11-22 13:48:42,776 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 102 places, 182 transitions, 1949 flow [2024-11-22 13:48:42,776 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-22 13:48:42,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-11-22 13:48:42,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 83 transitions. [2024-11-22 13:48:42,777 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.49404761904761907 [2024-11-22 13:48:42,777 INFO L175 Difference]: Start difference. First operand has 96 places, 110 transitions, 1031 flow. Second operand 7 states and 83 transitions. [2024-11-22 13:48:42,777 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 102 places, 182 transitions, 1949 flow [2024-11-22 13:48:42,784 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 96 places, 182 transitions, 1896 flow, removed 2 selfloop flow, removed 6 redundant places. [2024-11-22 13:48:42,786 INFO L231 Difference]: Finished difference. Result has 100 places, 113 transitions, 1080 flow [2024-11-22 13:48:42,786 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=24, PETRI_DIFFERENCE_MINUEND_FLOW=995, PETRI_DIFFERENCE_MINUEND_PLACES=90, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=110, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=92, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1080, PETRI_PLACES=100, PETRI_TRANSITIONS=113} [2024-11-22 13:48:42,787 INFO L277 CegarLoopForPetriNet]: 25 programPoint places, 75 predicate places. [2024-11-22 13:48:42,787 INFO L471 AbstractCegarLoop]: Abstraction has has 100 places, 113 transitions, 1080 flow [2024-11-22 13:48:42,787 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 6.111111111111111) internal successors, (55), 9 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-22 13:48:42,787 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-22 13:48:42,787 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] [2024-11-22 13:48:42,796 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2024-11-22 13:48:42,988 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2024-11-22 13:48:42,988 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-22 13:48:42,989 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 13:48:42,989 INFO L85 PathProgramCache]: Analyzing trace with hash -1161325497, now seen corresponding path program 11 times [2024-11-22 13:48:42,989 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 13:48:42,990 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1292576129] [2024-11-22 13:48:42,990 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-22 13:48:42,991 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 13:48:43,002 INFO L227 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2024-11-22 13:48:43,002 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-22 13:48:43,040 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-22 13:48:43,040 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 13:48:43,040 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1292576129] [2024-11-22 13:48:43,040 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1292576129] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-22 13:48:43,040 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1018020864] [2024-11-22 13:48:43,041 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-22 13:48:43,041 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 13:48:43,041 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-22 13:48:43,047 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-22 13:48:43,047 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-11-22 13:48:43,102 INFO L227 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2024-11-22 13:48:43,102 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-22 13:48:43,102 INFO L255 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-11-22 13:48:43,103 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-22 13:48:43,144 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-22 13:48:43,144 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-22 13:48:43,170 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-22 13:48:43,170 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1018020864] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-22 13:48:43,170 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-22 13:48:43,170 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 10 [2024-11-22 13:48:43,170 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [753587559] [2024-11-22 13:48:43,170 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-22 13:48:43,171 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-11-22 13:48:43,171 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 13:48:43,171 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-11-22 13:48:43,172 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-11-22 13:48:43,177 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 24 [2024-11-22 13:48:43,177 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 100 places, 113 transitions, 1080 flow. Second operand has 10 states, 10 states have (on average 6.2) internal successors, (62), 10 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) [2024-11-22 13:48:43,177 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-22 13:48:43,177 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 24 [2024-11-22 13:48:43,177 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-22 13:48:43,556 INFO L124 PetriNetUnfolderBase]: 1004/1694 cut-off events. [2024-11-22 13:48:43,556 INFO L125 PetriNetUnfolderBase]: For 6924/6924 co-relation queries the response was YES. [2024-11-22 13:48:43,560 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7929 conditions, 1694 events. 1004/1694 cut-off events. For 6924/6924 co-relation queries the response was YES. Maximal size of possible extension queue 85. Compared 8146 event pairs, 127 based on Foata normal form. 24/1718 useless extension candidates. Maximal degree in co-relation 7875. Up to 488 conditions per place. [2024-11-22 13:48:43,567 INFO L140 encePairwiseOnDemand]: 16/24 looper letters, 230 selfloop transitions, 75 changer transitions 0/306 dead transitions. [2024-11-22 13:48:43,567 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 119 places, 306 transitions, 3199 flow [2024-11-22 13:48:43,568 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2024-11-22 13:48:43,568 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2024-11-22 13:48:43,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 224 transitions. [2024-11-22 13:48:43,568 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.42424242424242425 [2024-11-22 13:48:43,569 INFO L175 Difference]: Start difference. First operand has 100 places, 113 transitions, 1080 flow. Second operand 22 states and 224 transitions. [2024-11-22 13:48:43,569 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 119 places, 306 transitions, 3199 flow [2024-11-22 13:48:43,581 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 117 places, 306 transitions, 3171 flow, removed 14 selfloop flow, removed 2 redundant places. [2024-11-22 13:48:43,583 INFO L231 Difference]: Finished difference. Result has 131 places, 164 transitions, 1828 flow [2024-11-22 13:48:43,584 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=24, PETRI_DIFFERENCE_MINUEND_FLOW=1076, PETRI_DIFFERENCE_MINUEND_PLACES=96, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=113, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=1828, PETRI_PLACES=131, PETRI_TRANSITIONS=164} [2024-11-22 13:48:43,584 INFO L277 CegarLoopForPetriNet]: 25 programPoint places, 106 predicate places. [2024-11-22 13:48:43,584 INFO L471 AbstractCegarLoop]: Abstraction has has 131 places, 164 transitions, 1828 flow [2024-11-22 13:48:43,584 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 6.2) internal successors, (62), 10 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) [2024-11-22 13:48:43,584 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-22 13:48:43,584 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] [2024-11-22 13:48:43,595 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2024-11-22 13:48:43,785 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2024-11-22 13:48:43,785 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-22 13:48:43,785 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 13:48:43,785 INFO L85 PathProgramCache]: Analyzing trace with hash 510779821, now seen corresponding path program 12 times [2024-11-22 13:48:43,785 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 13:48:43,785 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [458351536] [2024-11-22 13:48:43,785 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-22 13:48:43,786 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 13:48:43,800 INFO L227 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2024-11-22 13:48:43,800 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-22 13:48:43,840 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-22 13:48:43,840 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 13:48:43,840 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [458351536] [2024-11-22 13:48:43,840 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [458351536] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-22 13:48:43,840 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1673597530] [2024-11-22 13:48:43,841 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-22 13:48:43,841 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 13:48:43,841 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-22 13:48:43,843 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-22 13:48:43,845 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2024-11-22 13:48:43,897 INFO L227 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2024-11-22 13:48:43,898 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-22 13:48:43,898 INFO L255 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-11-22 13:48:43,899 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-22 13:48:43,939 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-22 13:48:43,939 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-22 13:48:43,963 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-22 13:48:43,963 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1673597530] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-22 13:48:43,963 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-22 13:48:43,963 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 11 [2024-11-22 13:48:43,963 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1510377155] [2024-11-22 13:48:43,963 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-22 13:48:43,964 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-11-22 13:48:43,964 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 13:48:43,964 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-11-22 13:48:43,964 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2024-11-22 13:48:43,974 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 24 [2024-11-22 13:48:43,974 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 131 places, 164 transitions, 1828 flow. Second operand has 11 states, 11 states have (on average 6.181818181818182) internal successors, (68), 11 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) [2024-11-22 13:48:43,974 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-22 13:48:43,974 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 24 [2024-11-22 13:48:43,974 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-22 13:48:44,210 INFO L124 PetriNetUnfolderBase]: 1005/1710 cut-off events. [2024-11-22 13:48:44,210 INFO L125 PetriNetUnfolderBase]: For 11010/11010 co-relation queries the response was YES. [2024-11-22 13:48:44,215 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9473 conditions, 1710 events. 1005/1710 cut-off events. For 11010/11010 co-relation queries the response was YES. Maximal size of possible extension queue 91. Compared 8225 event pairs, 273 based on Foata normal form. 12/1722 useless extension candidates. Maximal degree in co-relation 9406. Up to 677 conditions per place. [2024-11-22 13:48:44,220 INFO L140 encePairwiseOnDemand]: 17/24 looper letters, 183 selfloop transitions, 40 changer transitions 7/231 dead transitions. [2024-11-22 13:48:44,221 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 138 places, 231 transitions, 2920 flow [2024-11-22 13:48:44,221 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-22 13:48:44,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-11-22 13:48:44,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 93 transitions. [2024-11-22 13:48:44,222 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.484375 [2024-11-22 13:48:44,222 INFO L175 Difference]: Start difference. First operand has 131 places, 164 transitions, 1828 flow. Second operand 8 states and 93 transitions. [2024-11-22 13:48:44,222 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 138 places, 231 transitions, 2920 flow [2024-11-22 13:48:44,250 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 131 places, 231 transitions, 2757 flow, removed 33 selfloop flow, removed 7 redundant places. [2024-11-22 13:48:44,255 INFO L231 Difference]: Finished difference. Result has 133 places, 163 transitions, 1753 flow [2024-11-22 13:48:44,255 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=24, PETRI_DIFFERENCE_MINUEND_FLOW=1665, PETRI_DIFFERENCE_MINUEND_PLACES=124, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=164, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=124, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1753, PETRI_PLACES=133, PETRI_TRANSITIONS=163} [2024-11-22 13:48:44,256 INFO L277 CegarLoopForPetriNet]: 25 programPoint places, 108 predicate places. [2024-11-22 13:48:44,256 INFO L471 AbstractCegarLoop]: Abstraction has has 133 places, 163 transitions, 1753 flow [2024-11-22 13:48:44,256 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 6.181818181818182) internal successors, (68), 11 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) [2024-11-22 13:48:44,256 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-22 13:48:44,256 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] [2024-11-22 13:48:44,262 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2024-11-22 13:48:44,460 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 13:48:44,461 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-22 13:48:44,461 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 13:48:44,461 INFO L85 PathProgramCache]: Analyzing trace with hash 231390721, now seen corresponding path program 13 times [2024-11-22 13:48:44,461 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 13:48:44,461 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1045593785] [2024-11-22 13:48:44,462 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-22 13:48:44,462 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 13:48:44,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 13:48:44,584 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-22 13:48:44,584 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 13:48:44,584 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1045593785] [2024-11-22 13:48:44,584 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1045593785] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-22 13:48:44,584 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1373193943] [2024-11-22 13:48:44,584 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-22 13:48:44,584 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 13:48:44,584 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-22 13:48:44,586 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-22 13:48:44,588 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2024-11-22 13:48:44,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 13:48:44,638 INFO L255 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-22 13:48:44,639 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-22 13:48:44,749 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-22 13:48:44,749 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-22 13:48:44,826 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-22 13:48:44,826 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1373193943] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-22 13:48:44,826 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-22 13:48:44,826 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 14 [2024-11-22 13:48:44,826 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [138386656] [2024-11-22 13:48:44,826 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-22 13:48:44,826 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-11-22 13:48:44,827 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 13:48:44,827 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-11-22 13:48:44,827 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=149, Unknown=0, NotChecked=0, Total=210 [2024-11-22 13:48:44,866 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 24 [2024-11-22 13:48:44,867 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 133 places, 163 transitions, 1753 flow. Second operand has 15 states, 15 states have (on average 6.733333333333333) internal successors, (101), 15 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-22 13:48:44,867 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-22 13:48:44,867 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 24 [2024-11-22 13:48:44,867 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-22 13:48:45,058 INFO L124 PetriNetUnfolderBase]: 645/1156 cut-off events. [2024-11-22 13:48:45,058 INFO L125 PetriNetUnfolderBase]: For 8252/8286 co-relation queries the response was YES. [2024-11-22 13:48:45,062 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6441 conditions, 1156 events. 645/1156 cut-off events. For 8252/8286 co-relation queries the response was YES. Maximal size of possible extension queue 64. Compared 5553 event pairs, 82 based on Foata normal form. 46/1201 useless extension candidates. Maximal degree in co-relation 6376. Up to 394 conditions per place. [2024-11-22 13:48:45,065 INFO L140 encePairwiseOnDemand]: 17/24 looper letters, 143 selfloop transitions, 40 changer transitions 0/192 dead transitions. [2024-11-22 13:48:45,065 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 138 places, 192 transitions, 2406 flow [2024-11-22 13:48:45,065 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-22 13:48:45,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-11-22 13:48:45,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 85 transitions. [2024-11-22 13:48:45,066 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.39351851851851855 [2024-11-22 13:48:45,066 INFO L175 Difference]: Start difference. First operand has 133 places, 163 transitions, 1753 flow. Second operand 9 states and 85 transitions. [2024-11-22 13:48:45,066 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 138 places, 192 transitions, 2406 flow [2024-11-22 13:48:45,081 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 130 places, 192 transitions, 2265 flow, removed 14 selfloop flow, removed 8 redundant places. [2024-11-22 13:48:45,083 INFO L231 Difference]: Finished difference. Result has 130 places, 159 transitions, 1656 flow [2024-11-22 13:48:45,083 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=24, PETRI_DIFFERENCE_MINUEND_FLOW=1576, PETRI_DIFFERENCE_MINUEND_PLACES=122, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=159, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=119, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1656, PETRI_PLACES=130, PETRI_TRANSITIONS=159} [2024-11-22 13:48:45,084 INFO L277 CegarLoopForPetriNet]: 25 programPoint places, 105 predicate places. [2024-11-22 13:48:45,084 INFO L471 AbstractCegarLoop]: Abstraction has has 130 places, 159 transitions, 1656 flow [2024-11-22 13:48:45,084 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 6.733333333333333) internal successors, (101), 15 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-22 13:48:45,084 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-22 13:48:45,084 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-22 13:48:45,092 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2024-11-22 13:48:45,284 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2024-11-22 13:48:45,284 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-22 13:48:45,285 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 13:48:45,285 INFO L85 PathProgramCache]: Analyzing trace with hash -890510467, now seen corresponding path program 14 times [2024-11-22 13:48:45,285 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 13:48:45,285 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [585911545] [2024-11-22 13:48:45,285 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-22 13:48:45,285 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 13:48:45,308 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-22 13:48:45,308 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-22 13:48:46,251 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-22 13:48:46,251 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 13:48:46,252 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [585911545] [2024-11-22 13:48:46,252 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [585911545] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-22 13:48:46,252 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [626613656] [2024-11-22 13:48:46,252 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-22 13:48:46,252 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 13:48:46,252 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-22 13:48:46,254 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-22 13:48:46,255 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2024-11-22 13:48:46,309 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-22 13:48:46,309 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-22 13:48:46,310 INFO L255 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 27 conjuncts are in the unsatisfiable core [2024-11-22 13:48:46,310 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-22 13:48:46,474 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-22 13:48:46,474 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-22 13:48:46,608 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-22 13:48:46,608 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 35 treesize of output 43 [2024-11-22 13:48:46,646 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-22 13:48:46,647 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [626613656] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-22 13:48:46,647 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-22 13:48:46,647 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 9, 9] total 27 [2024-11-22 13:48:46,647 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1549412317] [2024-11-22 13:48:46,647 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-22 13:48:46,649 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2024-11-22 13:48:46,649 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 13:48:46,649 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2024-11-22 13:48:46,650 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=674, Unknown=0, NotChecked=0, Total=756 [2024-11-22 13:48:46,780 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 24 [2024-11-22 13:48:46,780 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 130 places, 159 transitions, 1656 flow. Second operand has 28 states, 28 states have (on average 5.928571428571429) internal successors, (166), 28 states have internal predecessors, (166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-22 13:48:46,780 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-22 13:48:46,780 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 24 [2024-11-22 13:48:46,780 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-22 13:48:47,729 INFO L124 PetriNetUnfolderBase]: 860/1555 cut-off events. [2024-11-22 13:48:47,729 INFO L125 PetriNetUnfolderBase]: For 9058/9068 co-relation queries the response was YES. [2024-11-22 13:48:47,734 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8307 conditions, 1555 events. 860/1555 cut-off events. For 9058/9068 co-relation queries the response was YES. Maximal size of possible extension queue 84. Compared 8063 event pairs, 28 based on Foata normal form. 7/1560 useless extension candidates. Maximal degree in co-relation 8241. Up to 871 conditions per place. [2024-11-22 13:48:47,738 INFO L140 encePairwiseOnDemand]: 13/24 looper letters, 185 selfloop transitions, 89 changer transitions 1/284 dead transitions. [2024-11-22 13:48:47,739 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 150 places, 284 transitions, 3194 flow [2024-11-22 13:48:47,740 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2024-11-22 13:48:47,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2024-11-22 13:48:47,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 206 transitions. [2024-11-22 13:48:47,741 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4087301587301587 [2024-11-22 13:48:47,741 INFO L175 Difference]: Start difference. First operand has 130 places, 159 transitions, 1656 flow. Second operand 21 states and 206 transitions. [2024-11-22 13:48:47,741 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 150 places, 284 transitions, 3194 flow [2024-11-22 13:48:47,757 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 144 places, 284 transitions, 3127 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-11-22 13:48:47,760 INFO L231 Difference]: Finished difference. Result has 151 places, 191 transitions, 2213 flow [2024-11-22 13:48:47,760 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=24, PETRI_DIFFERENCE_MINUEND_FLOW=1603, PETRI_DIFFERENCE_MINUEND_PLACES=124, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=159, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=59, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=89, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=2213, PETRI_PLACES=151, PETRI_TRANSITIONS=191} [2024-11-22 13:48:47,760 INFO L277 CegarLoopForPetriNet]: 25 programPoint places, 126 predicate places. [2024-11-22 13:48:47,761 INFO L471 AbstractCegarLoop]: Abstraction has has 151 places, 191 transitions, 2213 flow [2024-11-22 13:48:47,761 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 5.928571428571429) internal successors, (166), 28 states have internal predecessors, (166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-22 13:48:47,761 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-22 13:48:47,761 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-22 13:48:47,767 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2024-11-22 13:48:47,965 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 13:48:47,966 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-22 13:48:47,966 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 13:48:47,966 INFO L85 PathProgramCache]: Analyzing trace with hash 1990867275, now seen corresponding path program 15 times [2024-11-22 13:48:47,966 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 13:48:47,966 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1749109516] [2024-11-22 13:48:47,966 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-22 13:48:47,966 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 13:48:47,993 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-11-22 13:48:47,993 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-22 13:48:48,656 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-22 13:48:48,656 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 13:48:48,656 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1749109516] [2024-11-22 13:48:48,656 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1749109516] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-22 13:48:48,656 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1034531865] [2024-11-22 13:48:48,656 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-22 13:48:48,657 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 13:48:48,657 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-22 13:48:48,660 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-22 13:48:48,661 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2024-11-22 13:48:48,721 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-11-22 13:48:48,721 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-22 13:48:48,722 INFO L255 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 52 conjuncts are in the unsatisfiable core [2024-11-22 13:48:48,728 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-22 13:48:48,766 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-11-22 13:48:49,119 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-22 13:48:49,129 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-22 13:48:49,129 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 30 treesize of output 33 [2024-11-22 13:48:49,189 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-22 13:48:49,189 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-22 13:48:49,726 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 66 treesize of output 58 [2024-11-22 13:48:49,770 INFO L349 Elim1Store]: treesize reduction 10, result has 77.8 percent of original size [2024-11-22 13:48:49,772 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 474 treesize of output 332 [2024-11-22 13:48:50,451 WARN L672 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2024-11-22 13:48:51,370 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-22 13:48:51,371 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1034531865] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-22 13:48:51,371 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-22 13:48:51,371 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 44 [2024-11-22 13:48:51,371 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [273998780] [2024-11-22 13:48:51,371 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-22 13:48:51,371 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2024-11-22 13:48:51,371 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 13:48:51,372 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2024-11-22 13:48:51,372 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=224, Invalid=1756, Unknown=0, NotChecked=0, Total=1980 [2024-11-22 13:48:51,384 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 24 [2024-11-22 13:48:51,384 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 151 places, 191 transitions, 2213 flow. Second operand has 45 states, 45 states have (on average 4.644444444444445) internal successors, (209), 45 states have internal predecessors, (209), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-22 13:48:51,384 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-22 13:48:51,384 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 24 [2024-11-22 13:48:51,385 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-22 13:48:54,643 INFO L124 PetriNetUnfolderBase]: 2329/3936 cut-off events. [2024-11-22 13:48:54,643 INFO L125 PetriNetUnfolderBase]: For 27075/27075 co-relation queries the response was YES. [2024-11-22 13:48:54,654 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22522 conditions, 3936 events. 2329/3936 cut-off events. For 27075/27075 co-relation queries the response was YES. Maximal size of possible extension queue 177. Compared 22491 event pairs, 39 based on Foata normal form. 2/3938 useless extension candidates. Maximal degree in co-relation 20917. Up to 1422 conditions per place. [2024-11-22 13:48:54,667 INFO L140 encePairwiseOnDemand]: 10/24 looper letters, 307 selfloop transitions, 408 changer transitions 8/724 dead transitions. [2024-11-22 13:48:54,667 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 227 places, 724 transitions, 8592 flow [2024-11-22 13:48:54,668 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2024-11-22 13:48:54,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2024-11-22 13:48:54,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 622 transitions. [2024-11-22 13:48:54,669 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.3365800865800866 [2024-11-22 13:48:54,670 INFO L175 Difference]: Start difference. First operand has 151 places, 191 transitions, 2213 flow. Second operand 77 states and 622 transitions. [2024-11-22 13:48:54,670 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 227 places, 724 transitions, 8592 flow [2024-11-22 13:48:54,736 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 219 places, 724 transitions, 8154 flow, removed 165 selfloop flow, removed 8 redundant places. [2024-11-22 13:48:54,743 INFO L231 Difference]: Finished difference. Result has 245 places, 497 transitions, 6969 flow [2024-11-22 13:48:54,743 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=24, PETRI_DIFFERENCE_MINUEND_FLOW=2067, PETRI_DIFFERENCE_MINUEND_PLACES=143, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=191, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=127, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=77, PETRI_FLOW=6969, PETRI_PLACES=245, PETRI_TRANSITIONS=497} [2024-11-22 13:48:54,743 INFO L277 CegarLoopForPetriNet]: 25 programPoint places, 220 predicate places. [2024-11-22 13:48:54,743 INFO L471 AbstractCegarLoop]: Abstraction has has 245 places, 497 transitions, 6969 flow [2024-11-22 13:48:54,744 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 4.644444444444445) internal successors, (209), 45 states have internal predecessors, (209), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-22 13:48:54,744 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-22 13:48:54,744 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-22 13:48:54,756 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2024-11-22 13:48:54,944 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 13:48:54,945 INFO L396 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-22 13:48:54,945 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 13:48:54,945 INFO L85 PathProgramCache]: Analyzing trace with hash 986418315, now seen corresponding path program 16 times [2024-11-22 13:48:54,945 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 13:48:54,945 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1107248873] [2024-11-22 13:48:54,945 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-22 13:48:54,945 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 13:48:54,965 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-22 13:48:54,965 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-22 13:48:55,395 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-22 13:48:55,397 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 13:48:55,397 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1107248873] [2024-11-22 13:48:55,400 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1107248873] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-22 13:48:55,400 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1528021545] [2024-11-22 13:48:55,400 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-22 13:48:55,400 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 13:48:55,400 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-22 13:48:55,403 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-22 13:48:55,404 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2024-11-22 13:48:55,478 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-22 13:48:55,479 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-22 13:48:55,480 INFO L255 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 27 conjuncts are in the unsatisfiable core [2024-11-22 13:48:55,481 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-22 13:48:55,638 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-22 13:48:55,639 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-22 13:48:55,760 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-22 13:48:55,760 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 35 treesize of output 43 [2024-11-22 13:48:55,798 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-22 13:48:55,798 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1528021545] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-22 13:48:55,799 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-22 13:48:55,799 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 9, 9] total 27 [2024-11-22 13:48:55,799 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1129883642] [2024-11-22 13:48:55,799 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-22 13:48:55,799 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2024-11-22 13:48:55,799 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 13:48:55,800 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2024-11-22 13:48:55,800 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=674, Unknown=0, NotChecked=0, Total=756 [2024-11-22 13:48:56,017 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 24 [2024-11-22 13:48:56,018 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 245 places, 497 transitions, 6969 flow. Second operand has 28 states, 28 states have (on average 5.857142857142857) internal successors, (164), 28 states have internal predecessors, (164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-22 13:48:56,018 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-22 13:48:56,018 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 24 [2024-11-22 13:48:56,018 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-22 13:48:57,292 INFO L124 PetriNetUnfolderBase]: 2221/3929 cut-off events. [2024-11-22 13:48:57,292 INFO L125 PetriNetUnfolderBase]: For 46614/46735 co-relation queries the response was YES. [2024-11-22 13:48:57,311 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27704 conditions, 3929 events. 2221/3929 cut-off events. For 46614/46735 co-relation queries the response was YES. Maximal size of possible extension queue 197. Compared 24521 event pairs, 147 based on Foata normal form. 31/3913 useless extension candidates. Maximal degree in co-relation 27630. Up to 2865 conditions per place. [2024-11-22 13:48:57,326 INFO L140 encePairwiseOnDemand]: 14/24 looper letters, 498 selfloop transitions, 123 changer transitions 1/652 dead transitions. [2024-11-22 13:48:57,327 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 267 places, 652 transitions, 9763 flow [2024-11-22 13:48:57,327 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2024-11-22 13:48:57,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2024-11-22 13:48:57,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 256 transitions. [2024-11-22 13:48:57,328 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4266666666666667 [2024-11-22 13:48:57,328 INFO L175 Difference]: Start difference. First operand has 245 places, 497 transitions, 6969 flow. Second operand 25 states and 256 transitions. [2024-11-22 13:48:57,328 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 267 places, 652 transitions, 9763 flow [2024-11-22 13:48:57,671 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 256 places, 652 transitions, 8976 flow, removed 356 selfloop flow, removed 11 redundant places. [2024-11-22 13:48:57,682 INFO L231 Difference]: Finished difference. Result has 263 places, 538 transitions, 7249 flow [2024-11-22 13:48:57,682 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=24, PETRI_DIFFERENCE_MINUEND_FLOW=6349, PETRI_DIFFERENCE_MINUEND_PLACES=232, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=497, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=87, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=383, PETRI_DIFFERENCE_SUBTRAHEND_STATES=25, PETRI_FLOW=7249, PETRI_PLACES=263, PETRI_TRANSITIONS=538} [2024-11-22 13:48:57,684 INFO L277 CegarLoopForPetriNet]: 25 programPoint places, 238 predicate places. [2024-11-22 13:48:57,684 INFO L471 AbstractCegarLoop]: Abstraction has has 263 places, 538 transitions, 7249 flow [2024-11-22 13:48:57,684 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 5.857142857142857) internal successors, (164), 28 states have internal predecessors, (164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-22 13:48:57,684 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-22 13:48:57,685 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-22 13:48:57,712 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2024-11-22 13:48:57,888 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 13:48:57,889 INFO L396 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-22 13:48:57,889 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 13:48:57,889 INFO L85 PathProgramCache]: Analyzing trace with hash -2060191075, now seen corresponding path program 17 times [2024-11-22 13:48:57,890 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 13:48:57,890 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [767444654] [2024-11-22 13:48:57,890 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-22 13:48:57,890 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 13:48:57,970 INFO L227 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2024-11-22 13:48:57,970 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-22 13:48:58,207 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-22 13:48:58,207 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 13:48:58,207 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [767444654] [2024-11-22 13:48:58,207 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [767444654] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-22 13:48:58,207 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [357852087] [2024-11-22 13:48:58,207 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-22 13:48:58,207 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 13:48:58,208 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-22 13:48:58,210 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-22 13:48:58,213 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2024-11-22 13:48:58,270 INFO L227 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2024-11-22 13:48:58,271 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-22 13:48:58,272 INFO L255 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 29 conjuncts are in the unsatisfiable core [2024-11-22 13:48:58,272 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-22 13:48:58,382 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-22 13:48:58,382 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-22 13:48:58,480 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-22 13:48:58,481 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 35 treesize of output 43 [2024-11-22 13:48:58,510 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-22 13:48:58,511 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [357852087] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-22 13:48:58,511 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-22 13:48:58,511 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 9, 9] total 22 [2024-11-22 13:48:58,511 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1718806698] [2024-11-22 13:48:58,511 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-22 13:48:58,511 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2024-11-22 13:48:58,511 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 13:48:58,512 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2024-11-22 13:48:58,512 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=438, Unknown=0, NotChecked=0, Total=506 [2024-11-22 13:48:58,626 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 24 [2024-11-22 13:48:58,627 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 263 places, 538 transitions, 7249 flow. Second operand has 23 states, 23 states have (on average 6.956521739130435) internal successors, (160), 23 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-22 13:48:58,627 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-22 13:48:58,627 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 24 [2024-11-22 13:48:58,627 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-22 13:48:59,506 INFO L124 PetriNetUnfolderBase]: 2184/4015 cut-off events. [2024-11-22 13:48:59,506 INFO L125 PetriNetUnfolderBase]: For 48461/48636 co-relation queries the response was YES. [2024-11-22 13:48:59,526 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28250 conditions, 4015 events. 2184/4015 cut-off events. For 48461/48636 co-relation queries the response was YES. Maximal size of possible extension queue 223. Compared 26712 event pairs, 113 based on Foata normal form. 109/4049 useless extension candidates. Maximal degree in co-relation 27557. Up to 2744 conditions per place. [2024-11-22 13:48:59,539 INFO L140 encePairwiseOnDemand]: 15/24 looper letters, 432 selfloop transitions, 115 changer transitions 1/618 dead transitions. [2024-11-22 13:48:59,539 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 277 places, 618 transitions, 9184 flow [2024-11-22 13:48:59,542 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-11-22 13:48:59,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2024-11-22 13:48:59,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 157 transitions. [2024-11-22 13:48:59,543 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4361111111111111 [2024-11-22 13:48:59,543 INFO L175 Difference]: Start difference. First operand has 263 places, 538 transitions, 7249 flow. Second operand 15 states and 157 transitions. [2024-11-22 13:48:59,543 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 277 places, 618 transitions, 9184 flow [2024-11-22 13:48:59,722 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 271 places, 618 transitions, 9041 flow, removed 46 selfloop flow, removed 6 redundant places. [2024-11-22 13:48:59,730 INFO L231 Difference]: Finished difference. Result has 276 places, 569 transitions, 7982 flow [2024-11-22 13:48:59,730 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=24, PETRI_DIFFERENCE_MINUEND_FLOW=7106, PETRI_DIFFERENCE_MINUEND_PLACES=257, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=538, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=88, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=431, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=7982, PETRI_PLACES=276, PETRI_TRANSITIONS=569} [2024-11-22 13:48:59,731 INFO L277 CegarLoopForPetriNet]: 25 programPoint places, 251 predicate places. [2024-11-22 13:48:59,731 INFO L471 AbstractCegarLoop]: Abstraction has has 276 places, 569 transitions, 7982 flow [2024-11-22 13:48:59,731 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 6.956521739130435) internal successors, (160), 23 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-22 13:48:59,731 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-22 13:48:59,731 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-22 13:48:59,738 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2024-11-22 13:48:59,932 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 13:48:59,932 INFO L396 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-22 13:48:59,932 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 13:48:59,932 INFO L85 PathProgramCache]: Analyzing trace with hash -313475961, now seen corresponding path program 18 times [2024-11-22 13:48:59,932 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 13:48:59,932 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [448715341] [2024-11-22 13:48:59,933 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-22 13:48:59,933 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 13:48:59,951 INFO L227 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2024-11-22 13:48:59,951 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-22 13:49:00,469 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-22 13:49:00,469 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 13:49:00,469 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [448715341] [2024-11-22 13:49:00,470 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [448715341] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-22 13:49:00,470 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [325049608] [2024-11-22 13:49:00,470 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-22 13:49:00,470 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 13:49:00,470 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-22 13:49:00,471 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-22 13:49:00,472 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2024-11-22 13:49:00,537 INFO L227 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2024-11-22 13:49:00,537 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-22 13:49:00,538 INFO L255 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 33 conjuncts are in the unsatisfiable core [2024-11-22 13:49:00,540 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-22 13:49:00,697 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-22 13:49:00,697 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-22 13:49:00,918 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-22 13:49:00,918 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 35 treesize of output 43 [2024-11-22 13:49:00,971 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-22 13:49:00,971 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [325049608] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-22 13:49:00,971 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-22 13:49:00,971 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 11, 9] total 29 [2024-11-22 13:49:00,972 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1411903099] [2024-11-22 13:49:00,972 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-22 13:49:00,972 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2024-11-22 13:49:00,973 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 13:49:00,973 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2024-11-22 13:49:00,973 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=753, Unknown=0, NotChecked=0, Total=870 [2024-11-22 13:49:01,012 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 24 [2024-11-22 13:49:01,012 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 276 places, 569 transitions, 7982 flow. Second operand has 30 states, 30 states have (on average 5.066666666666666) internal successors, (152), 30 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-22 13:49:01,012 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-22 13:49:01,012 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 24 [2024-11-22 13:49:01,012 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-22 13:49:03,085 INFO L124 PetriNetUnfolderBase]: 3196/5366 cut-off events. [2024-11-22 13:49:03,085 INFO L125 PetriNetUnfolderBase]: For 63319/63319 co-relation queries the response was YES. [2024-11-22 13:49:03,114 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37681 conditions, 5366 events. 3196/5366 cut-off events. For 63319/63319 co-relation queries the response was YES. Maximal size of possible extension queue 233. Compared 32653 event pairs, 196 based on Foata normal form. 1/5367 useless extension candidates. Maximal degree in co-relation 36708. Up to 3174 conditions per place. [2024-11-22 13:49:03,140 INFO L140 encePairwiseOnDemand]: 11/24 looper letters, 439 selfloop transitions, 397 changer transitions 3/840 dead transitions. [2024-11-22 13:49:03,140 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 314 places, 840 transitions, 12727 flow [2024-11-22 13:49:03,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2024-11-22 13:49:03,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2024-11-22 13:49:03,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 305 transitions. [2024-11-22 13:49:03,143 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.32585470085470086 [2024-11-22 13:49:03,143 INFO L175 Difference]: Start difference. First operand has 276 places, 569 transitions, 7982 flow. Second operand 39 states and 305 transitions. [2024-11-22 13:49:03,143 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 314 places, 840 transitions, 12727 flow [2024-11-22 13:49:03,434 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 306 places, 840 transitions, 12438 flow, removed 73 selfloop flow, removed 8 redundant places. [2024-11-22 13:49:03,446 INFO L231 Difference]: Finished difference. Result has 320 places, 709 transitions, 11247 flow [2024-11-22 13:49:03,446 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=24, PETRI_DIFFERENCE_MINUEND_FLOW=7726, PETRI_DIFFERENCE_MINUEND_PLACES=268, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=569, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=273, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=244, PETRI_DIFFERENCE_SUBTRAHEND_STATES=39, PETRI_FLOW=11247, PETRI_PLACES=320, PETRI_TRANSITIONS=709} [2024-11-22 13:49:03,446 INFO L277 CegarLoopForPetriNet]: 25 programPoint places, 295 predicate places. [2024-11-22 13:49:03,447 INFO L471 AbstractCegarLoop]: Abstraction has has 320 places, 709 transitions, 11247 flow [2024-11-22 13:49:03,447 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 5.066666666666666) internal successors, (152), 30 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-22 13:49:03,447 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-22 13:49:03,447 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-22 13:49:03,453 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2024-11-22 13:49:03,651 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2024-11-22 13:49:03,651 INFO L396 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-22 13:49:03,652 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 13:49:03,652 INFO L85 PathProgramCache]: Analyzing trace with hash -1872326633, now seen corresponding path program 19 times [2024-11-22 13:49:03,652 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 13:49:03,652 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2075423342] [2024-11-22 13:49:03,652 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-22 13:49:03,652 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 13:49:03,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 13:49:04,165 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-22 13:49:04,165 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 13:49:04,165 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2075423342] [2024-11-22 13:49:04,166 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2075423342] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-22 13:49:04,166 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1749572686] [2024-11-22 13:49:04,166 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-22 13:49:04,166 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 13:49:04,166 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-22 13:49:04,170 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-22 13:49:04,172 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2024-11-22 13:49:04,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 13:49:04,235 INFO L255 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 27 conjuncts are in the unsatisfiable core [2024-11-22 13:49:04,237 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-22 13:49:04,396 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-22 13:49:04,396 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-22 13:49:04,562 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-22 13:49:04,563 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 35 treesize of output 43 [2024-11-22 13:49:04,600 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-22 13:49:04,600 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1749572686] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-22 13:49:04,600 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-22 13:49:04,600 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 9, 9] total 28 [2024-11-22 13:49:04,601 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1946314320] [2024-11-22 13:49:04,601 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-22 13:49:04,601 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2024-11-22 13:49:04,601 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 13:49:04,601 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2024-11-22 13:49:04,602 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=711, Unknown=0, NotChecked=0, Total=812 [2024-11-22 13:49:04,707 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 24 [2024-11-22 13:49:04,707 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 320 places, 709 transitions, 11247 flow. Second operand has 29 states, 29 states have (on average 5.862068965517241) internal successors, (170), 29 states have internal predecessors, (170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-22 13:49:04,708 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-22 13:49:04,708 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 24 [2024-11-22 13:49:04,708 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-22 13:49:07,200 INFO L124 PetriNetUnfolderBase]: 3082/5396 cut-off events. [2024-11-22 13:49:07,200 INFO L125 PetriNetUnfolderBase]: For 81969/82176 co-relation queries the response was YES. [2024-11-22 13:49:07,230 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42557 conditions, 5396 events. 3082/5396 cut-off events. For 81969/82176 co-relation queries the response was YES. Maximal size of possible extension queue 267. Compared 35301 event pairs, 113 based on Foata normal form. 99/5478 useless extension candidates. Maximal degree in co-relation 41764. Up to 2953 conditions per place. [2024-11-22 13:49:07,253 INFO L140 encePairwiseOnDemand]: 13/24 looper letters, 396 selfloop transitions, 453 changer transitions 3/909 dead transitions. [2024-11-22 13:49:07,253 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 345 places, 909 transitions, 15661 flow [2024-11-22 13:49:07,254 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2024-11-22 13:49:07,254 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2024-11-22 13:49:07,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 241 transitions. [2024-11-22 13:49:07,255 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.38621794871794873 [2024-11-22 13:49:07,255 INFO L175 Difference]: Start difference. First operand has 320 places, 709 transitions, 11247 flow. Second operand 26 states and 241 transitions. [2024-11-22 13:49:07,255 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 345 places, 909 transitions, 15661 flow [2024-11-22 13:49:07,759 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 340 places, 909 transitions, 14984 flow, removed 311 selfloop flow, removed 5 redundant places. [2024-11-22 13:49:07,772 INFO L231 Difference]: Finished difference. Result has 349 places, 819 transitions, 14104 flow [2024-11-22 13:49:07,772 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=24, PETRI_DIFFERENCE_MINUEND_FLOW=10628, PETRI_DIFFERENCE_MINUEND_PLACES=315, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=709, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=352, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=301, PETRI_DIFFERENCE_SUBTRAHEND_STATES=26, PETRI_FLOW=14104, PETRI_PLACES=349, PETRI_TRANSITIONS=819} [2024-11-22 13:49:07,773 INFO L277 CegarLoopForPetriNet]: 25 programPoint places, 324 predicate places. [2024-11-22 13:49:07,773 INFO L471 AbstractCegarLoop]: Abstraction has has 349 places, 819 transitions, 14104 flow [2024-11-22 13:49:07,773 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 5.862068965517241) internal successors, (170), 29 states have internal predecessors, (170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-22 13:49:07,773 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-22 13:49:07,773 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-22 13:49:07,780 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2024-11-22 13:49:07,973 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2024-11-22 13:49:07,974 INFO L396 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-22 13:49:07,974 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 13:49:07,974 INFO L85 PathProgramCache]: Analyzing trace with hash 618949503, now seen corresponding path program 20 times [2024-11-22 13:49:07,974 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 13:49:07,974 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [461673530] [2024-11-22 13:49:07,974 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-22 13:49:07,974 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 13:49:08,003 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-22 13:49:08,003 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-22 13:49:08,527 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-22 13:49:08,528 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 13:49:08,528 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [461673530] [2024-11-22 13:49:08,528 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [461673530] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-22 13:49:08,528 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [834804022] [2024-11-22 13:49:08,528 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-22 13:49:08,528 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 13:49:08,528 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-22 13:49:08,529 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-22 13:49:08,531 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2024-11-22 13:49:08,591 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-22 13:49:08,591 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-22 13:49:08,592 INFO L255 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 27 conjuncts are in the unsatisfiable core [2024-11-22 13:49:08,593 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-22 13:49:08,726 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-22 13:49:08,726 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-22 13:49:08,868 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-22 13:49:08,868 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 35 treesize of output 43 [2024-11-22 13:49:08,899 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-22 13:49:08,899 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [834804022] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-22 13:49:08,899 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-22 13:49:08,899 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 9, 9] total 28 [2024-11-22 13:49:08,899 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [797950726] [2024-11-22 13:49:08,899 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-22 13:49:08,900 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2024-11-22 13:49:08,900 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 13:49:08,900 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2024-11-22 13:49:08,901 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=719, Unknown=0, NotChecked=0, Total=812 [2024-11-22 13:49:08,939 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 24 [2024-11-22 13:49:08,940 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 349 places, 819 transitions, 14104 flow. Second operand has 29 states, 29 states have (on average 5.103448275862069) internal successors, (148), 29 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-22 13:49:08,940 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-22 13:49:08,940 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 24 [2024-11-22 13:49:08,940 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-22 13:49:11,420 INFO L124 PetriNetUnfolderBase]: 3958/6621 cut-off events. [2024-11-22 13:49:11,420 INFO L125 PetriNetUnfolderBase]: For 108595/108595 co-relation queries the response was YES. [2024-11-22 13:49:11,456 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54596 conditions, 6621 events. 3958/6621 cut-off events. For 108595/108595 co-relation queries the response was YES. Maximal size of possible extension queue 312. Compared 42075 event pairs, 173 based on Foata normal form. 1/6622 useless extension candidates. Maximal degree in co-relation 53498. Up to 4037 conditions per place. [2024-11-22 13:49:11,479 INFO L140 encePairwiseOnDemand]: 12/24 looper letters, 544 selfloop transitions, 522 changer transitions 1/1068 dead transitions. [2024-11-22 13:49:11,479 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 374 places, 1068 transitions, 20176 flow [2024-11-22 13:49:11,480 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2024-11-22 13:49:11,480 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2024-11-22 13:49:11,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 230 transitions. [2024-11-22 13:49:11,481 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.3685897435897436 [2024-11-22 13:49:11,481 INFO L175 Difference]: Start difference. First operand has 349 places, 819 transitions, 14104 flow. Second operand 26 states and 230 transitions. [2024-11-22 13:49:11,481 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 374 places, 1068 transitions, 20176 flow [2024-11-22 13:49:12,146 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 360 places, 1068 transitions, 19348 flow, removed 262 selfloop flow, removed 14 redundant places. [2024-11-22 13:49:12,162 INFO L231 Difference]: Finished difference. Result has 370 places, 952 transitions, 17979 flow [2024-11-22 13:49:12,163 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=24, PETRI_DIFFERENCE_MINUEND_FLOW=13463, PETRI_DIFFERENCE_MINUEND_PLACES=335, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=819, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=406, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=355, PETRI_DIFFERENCE_SUBTRAHEND_STATES=26, PETRI_FLOW=17979, PETRI_PLACES=370, PETRI_TRANSITIONS=952} [2024-11-22 13:49:12,164 INFO L277 CegarLoopForPetriNet]: 25 programPoint places, 345 predicate places. [2024-11-22 13:49:12,164 INFO L471 AbstractCegarLoop]: Abstraction has has 370 places, 952 transitions, 17979 flow [2024-11-22 13:49:12,164 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 5.103448275862069) internal successors, (148), 29 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-22 13:49:12,164 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-22 13:49:12,164 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-22 13:49:12,170 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2024-11-22 13:49:12,368 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 13:49:12,368 INFO L396 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-22 13:49:12,369 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 13:49:12,369 INFO L85 PathProgramCache]: Analyzing trace with hash 807298443, now seen corresponding path program 21 times [2024-11-22 13:49:12,369 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 13:49:12,369 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1595769083] [2024-11-22 13:49:12,369 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-22 13:49:12,369 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 13:49:12,389 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-11-22 13:49:12,390 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-22 13:49:13,206 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-22 13:49:13,206 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 13:49:13,206 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1595769083] [2024-11-22 13:49:13,206 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1595769083] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-22 13:49:13,206 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [703529316] [2024-11-22 13:49:13,207 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-22 13:49:13,207 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 13:49:13,207 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-22 13:49:13,208 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-22 13:49:13,209 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2024-11-22 13:49:13,272 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-11-22 13:49:13,273 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-22 13:49:13,274 INFO L255 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 46 conjuncts are in the unsatisfiable core [2024-11-22 13:49:13,276 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-22 13:49:13,331 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 19 treesize of output 1 [2024-11-22 13:49:13,687 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-22 13:49:13,688 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 17 treesize of output 14 [2024-11-22 13:49:13,818 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-22 13:49:13,819 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-22 13:49:14,554 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 35 treesize of output 31 [2024-11-22 13:49:14,564 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-22 13:49:14,564 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 72 treesize of output 56 [2024-11-22 13:49:14,683 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-22 13:49:14,683 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [703529316] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-22 13:49:14,683 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-22 13:49:14,683 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 44 [2024-11-22 13:49:14,684 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1242167278] [2024-11-22 13:49:14,684 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-22 13:49:14,684 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2024-11-22 13:49:14,684 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 13:49:14,685 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2024-11-22 13:49:14,685 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=319, Invalid=1661, Unknown=0, NotChecked=0, Total=1980 [2024-11-22 13:49:14,693 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 24 [2024-11-22 13:49:14,694 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 370 places, 952 transitions, 17979 flow. Second operand has 45 states, 45 states have (on average 4.6) internal successors, (207), 45 states have internal predecessors, (207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-22 13:49:14,694 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-22 13:49:14,694 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 24 [2024-11-22 13:49:14,694 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-22 13:49:20,329 INFO L124 PetriNetUnfolderBase]: 5780/9625 cut-off events. [2024-11-22 13:49:20,330 INFO L125 PetriNetUnfolderBase]: For 193020/193020 co-relation queries the response was YES. [2024-11-22 13:49:20,395 INFO L83 FinitePrefix]: Finished finitePrefix Result has 85453 conditions, 9625 events. 5780/9625 cut-off events. For 193020/193020 co-relation queries the response was YES. Maximal size of possible extension queue 484. Compared 65412 event pairs, 95 based on Foata normal form. 2/9627 useless extension candidates. Maximal degree in co-relation 84529. Up to 4089 conditions per place. [2024-11-22 13:49:20,438 INFO L140 encePairwiseOnDemand]: 9/24 looper letters, 454 selfloop transitions, 1361 changer transitions 8/1824 dead transitions. [2024-11-22 13:49:20,438 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 438 places, 1824 transitions, 37199 flow [2024-11-22 13:49:20,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2024-11-22 13:49:20,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2024-11-22 13:49:20,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 560 transitions. [2024-11-22 13:49:20,442 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.33816425120772947 [2024-11-22 13:49:20,442 INFO L175 Difference]: Start difference. First operand has 370 places, 952 transitions, 17979 flow. Second operand 69 states and 560 transitions. [2024-11-22 13:49:20,442 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 438 places, 1824 transitions, 37199 flow [2024-11-22 13:49:22,226 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 423 places, 1824 transitions, 35852 flow, removed 512 selfloop flow, removed 15 redundant places. [2024-11-22 13:49:22,263 INFO L231 Difference]: Finished difference. Result has 446 places, 1635 transitions, 35472 flow [2024-11-22 13:49:22,265 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=24, PETRI_DIFFERENCE_MINUEND_FLOW=17129, PETRI_DIFFERENCE_MINUEND_PLACES=355, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=952, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=725, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=118, PETRI_DIFFERENCE_SUBTRAHEND_STATES=69, PETRI_FLOW=35472, PETRI_PLACES=446, PETRI_TRANSITIONS=1635} [2024-11-22 13:49:22,265 INFO L277 CegarLoopForPetriNet]: 25 programPoint places, 421 predicate places. [2024-11-22 13:49:22,266 INFO L471 AbstractCegarLoop]: Abstraction has has 446 places, 1635 transitions, 35472 flow [2024-11-22 13:49:22,266 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 4.6) internal successors, (207), 45 states have internal predecessors, (207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-22 13:49:22,266 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-22 13:49:22,266 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-22 13:49:22,272 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2024-11-22 13:49:22,470 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 13:49:22,471 INFO L396 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-22 13:49:22,471 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 13:49:22,471 INFO L85 PathProgramCache]: Analyzing trace with hash -78499837, now seen corresponding path program 22 times [2024-11-22 13:49:22,471 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 13:49:22,471 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1063663501] [2024-11-22 13:49:22,472 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-22 13:49:22,472 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 13:49:22,500 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-22 13:49:22,500 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-22 13:49:23,164 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-22 13:49:23,164 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 13:49:23,165 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1063663501] [2024-11-22 13:49:23,165 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1063663501] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-22 13:49:23,165 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [722770735] [2024-11-22 13:49:23,165 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-22 13:49:23,165 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 13:49:23,165 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-22 13:49:23,167 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-22 13:49:23,168 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2024-11-22 13:49:23,226 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-22 13:49:23,226 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-22 13:49:23,227 INFO L255 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 27 conjuncts are in the unsatisfiable core [2024-11-22 13:49:23,228 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-22 13:49:23,369 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-22 13:49:23,370 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-22 13:49:23,522 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-22 13:49:23,522 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 35 treesize of output 43 [2024-11-22 13:49:23,553 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-22 13:49:23,553 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [722770735] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-22 13:49:23,553 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-22 13:49:23,553 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 9, 9] total 27 [2024-11-22 13:49:23,554 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1858519754] [2024-11-22 13:49:23,554 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-22 13:49:23,554 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2024-11-22 13:49:23,554 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 13:49:23,554 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2024-11-22 13:49:23,555 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=677, Unknown=0, NotChecked=0, Total=756 [2024-11-22 13:49:23,703 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 24 [2024-11-22 13:49:23,703 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 446 places, 1635 transitions, 35472 flow. Second operand has 28 states, 28 states have (on average 5.857142857142857) internal successors, (164), 28 states have internal predecessors, (164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-22 13:49:23,704 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-22 13:49:23,704 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 24 [2024-11-22 13:49:23,704 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-22 13:49:30,883 INFO L124 PetriNetUnfolderBase]: 8026/13626 cut-off events. [2024-11-22 13:49:30,883 INFO L125 PetriNetUnfolderBase]: For 369834/370189 co-relation queries the response was YES. [2024-11-22 13:49:31,264 INFO L83 FinitePrefix]: Finished finitePrefix Result has 141159 conditions, 13626 events. 8026/13626 cut-off events. For 369834/370189 co-relation queries the response was YES. Maximal size of possible extension queue 709. Compared 99782 event pairs, 200 based on Foata normal form. 179/13790 useless extension candidates. Maximal degree in co-relation 140992. Up to 6980 conditions per place. [2024-11-22 13:49:31,370 INFO L140 encePairwiseOnDemand]: 10/24 looper letters, 1729 selfloop transitions, 836 changer transitions 1/2640 dead transitions. [2024-11-22 13:49:31,370 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 484 places, 2640 transitions, 62238 flow [2024-11-22 13:49:31,370 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2024-11-22 13:49:31,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2024-11-22 13:49:31,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 418 transitions. [2024-11-22 13:49:31,371 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4247967479674797 [2024-11-22 13:49:31,371 INFO L175 Difference]: Start difference. First operand has 446 places, 1635 transitions, 35472 flow. Second operand 41 states and 418 transitions. [2024-11-22 13:49:31,371 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 484 places, 2640 transitions, 62238 flow [2024-11-22 13:49:37,152 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 464 places, 2640 transitions, 57879 flow, removed 2007 selfloop flow, removed 20 redundant places. [2024-11-22 13:49:37,192 INFO L231 Difference]: Finished difference. Result has 486 places, 2255 transitions, 49710 flow [2024-11-22 13:49:37,193 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=24, PETRI_DIFFERENCE_MINUEND_FLOW=32870, PETRI_DIFFERENCE_MINUEND_PLACES=424, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1635, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=337, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1120, PETRI_DIFFERENCE_SUBTRAHEND_STATES=41, PETRI_FLOW=49710, PETRI_PLACES=486, PETRI_TRANSITIONS=2255} [2024-11-22 13:49:37,194 INFO L277 CegarLoopForPetriNet]: 25 programPoint places, 461 predicate places. [2024-11-22 13:49:37,194 INFO L471 AbstractCegarLoop]: Abstraction has has 486 places, 2255 transitions, 49710 flow [2024-11-22 13:49:37,194 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 5.857142857142857) internal successors, (164), 28 states have internal predecessors, (164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-22 13:49:37,194 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-22 13:49:37,194 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-22 13:49:37,203 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Ended with exit code 0 [2024-11-22 13:49:37,398 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2024-11-22 13:49:37,399 INFO L396 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-22 13:49:37,399 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 13:49:37,400 INFO L85 PathProgramCache]: Analyzing trace with hash -1601461727, now seen corresponding path program 23 times [2024-11-22 13:49:37,400 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 13:49:37,400 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [232785336] [2024-11-22 13:49:37,400 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-22 13:49:37,400 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 13:49:37,410 INFO L227 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2024-11-22 13:49:37,411 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-22 13:49:37,565 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-22 13:49:37,565 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 13:49:37,565 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [232785336] [2024-11-22 13:49:37,565 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [232785336] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-22 13:49:37,565 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [981774685] [2024-11-22 13:49:37,565 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-22 13:49:37,566 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 13:49:37,566 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-22 13:49:37,567 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-22 13:49:37,567 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2024-11-22 13:49:37,631 INFO L227 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2024-11-22 13:49:37,631 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-22 13:49:37,632 INFO L255 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 29 conjuncts are in the unsatisfiable core [2024-11-22 13:49:37,633 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-22 13:49:37,723 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-22 13:49:37,723 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-22 13:49:37,826 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-22 13:49:37,827 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 35 treesize of output 43 [2024-11-22 13:49:37,858 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-22 13:49:37,858 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [981774685] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-22 13:49:37,858 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-22 13:49:37,858 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 20 [2024-11-22 13:49:37,858 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [764259338] [2024-11-22 13:49:37,858 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-22 13:49:37,859 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-11-22 13:49:37,859 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 13:49:37,859 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-11-22 13:49:37,859 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=349, Unknown=0, NotChecked=0, Total=420 [2024-11-22 13:49:37,968 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 24 [2024-11-22 13:49:37,968 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 486 places, 2255 transitions, 49710 flow. Second operand has 21 states, 21 states have (on average 6.666666666666667) internal successors, (140), 21 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-22 13:49:37,968 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-22 13:49:37,968 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 24 [2024-11-22 13:49:37,968 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-22 13:49:44,904 INFO L124 PetriNetUnfolderBase]: 7997/13869 cut-off events. [2024-11-22 13:49:44,904 INFO L125 PetriNetUnfolderBase]: For 406219/406531 co-relation queries the response was YES. [2024-11-22 13:49:45,013 INFO L83 FinitePrefix]: Finished finitePrefix Result has 149554 conditions, 13869 events. 7997/13869 cut-off events. For 406219/406531 co-relation queries the response was YES. Maximal size of possible extension queue 732. Compared 104786 event pairs, 268 based on Foata normal form. 155/13939 useless extension candidates. Maximal degree in co-relation 148589. Up to 9966 conditions per place. [2024-11-22 13:49:45,083 INFO L140 encePairwiseOnDemand]: 14/24 looper letters, 1867 selfloop transitions, 317 changer transitions 1/2477 dead transitions. [2024-11-22 13:49:45,083 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 502 places, 2477 transitions, 58848 flow [2024-11-22 13:49:45,083 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-11-22 13:49:45,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2024-11-22 13:49:45,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 177 transitions. [2024-11-22 13:49:45,084 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4338235294117647 [2024-11-22 13:49:45,084 INFO L175 Difference]: Start difference. First operand has 486 places, 2255 transitions, 49710 flow. Second operand 17 states and 177 transitions. [2024-11-22 13:49:45,084 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 502 places, 2477 transitions, 58848 flow [2024-11-22 13:49:49,803 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 490 places, 2477 transitions, 56409 flow, removed 1179 selfloop flow, removed 12 redundant places. [2024-11-22 13:49:49,844 INFO L231 Difference]: Finished difference. Result has 499 places, 2405 transitions, 52446 flow [2024-11-22 13:49:49,845 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=24, PETRI_DIFFERENCE_MINUEND_FLOW=47329, PETRI_DIFFERENCE_MINUEND_PLACES=474, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2255, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=193, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1989, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=52446, PETRI_PLACES=499, PETRI_TRANSITIONS=2405} [2024-11-22 13:49:49,846 INFO L277 CegarLoopForPetriNet]: 25 programPoint places, 474 predicate places. [2024-11-22 13:49:49,846 INFO L471 AbstractCegarLoop]: Abstraction has has 499 places, 2405 transitions, 52446 flow [2024-11-22 13:49:49,846 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 6.666666666666667) internal successors, (140), 21 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-22 13:49:49,846 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-22 13:49:49,846 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-22 13:49:49,855 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Ended with exit code 0 [2024-11-22 13:49:50,050 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2024-11-22 13:49:50,051 INFO L396 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-22 13:49:50,051 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 13:49:50,051 INFO L85 PathProgramCache]: Analyzing trace with hash 1480409509, now seen corresponding path program 24 times [2024-11-22 13:49:50,051 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 13:49:50,051 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [944376919] [2024-11-22 13:49:50,051 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-22 13:49:50,051 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 13:49:50,062 INFO L227 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2024-11-22 13:49:50,062 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-22 13:49:50,486 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-22 13:49:50,486 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 13:49:50,486 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [944376919] [2024-11-22 13:49:50,486 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [944376919] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-22 13:49:50,486 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [608687655] [2024-11-22 13:49:50,486 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-22 13:49:50,487 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 13:49:50,487 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-22 13:49:50,489 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-22 13:49:50,489 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2024-11-22 13:49:50,548 INFO L227 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2024-11-22 13:49:50,549 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-22 13:49:50,549 INFO L255 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 33 conjuncts are in the unsatisfiable core [2024-11-22 13:49:50,550 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-22 13:49:50,695 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-22 13:49:50,695 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-22 13:49:50,832 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-22 13:49:50,833 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 35 treesize of output 43 [2024-11-22 13:49:50,883 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-22 13:49:50,883 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [608687655] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-22 13:49:50,883 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-22 13:49:50,883 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 11, 9] total 29 [2024-11-22 13:49:50,883 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [730219446] [2024-11-22 13:49:50,884 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-22 13:49:50,884 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2024-11-22 13:49:50,884 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 13:49:50,884 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2024-11-22 13:49:50,885 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=751, Unknown=0, NotChecked=0, Total=870 [2024-11-22 13:49:50,898 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 24 [2024-11-22 13:49:50,898 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 499 places, 2405 transitions, 52446 flow. Second operand has 30 states, 30 states have (on average 5.1) internal successors, (153), 30 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-22 13:49:50,898 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-22 13:49:50,899 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 24 [2024-11-22 13:49:50,899 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-22 13:50:02,375 INFO L124 PetriNetUnfolderBase]: 11931/19426 cut-off events. [2024-11-22 13:50:02,375 INFO L125 PetriNetUnfolderBase]: For 475714/475714 co-relation queries the response was YES. [2024-11-22 13:50:02,590 INFO L83 FinitePrefix]: Finished finitePrefix Result has 199324 conditions, 19426 events. 11931/19426 cut-off events. For 475714/475714 co-relation queries the response was YES. Maximal size of possible extension queue 897. Compared 137863 event pairs, 300 based on Foata normal form. 24/19450 useless extension candidates. Maximal degree in co-relation 198433. Up to 10440 conditions per place. [2024-11-22 13:50:02,849 INFO L140 encePairwiseOnDemand]: 10/24 looper letters, 1711 selfloop transitions, 1688 changer transitions 19/3419 dead transitions. [2024-11-22 13:50:02,850 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 556 places, 3419 transitions, 81120 flow [2024-11-22 13:50:02,850 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2024-11-22 13:50:02,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2024-11-22 13:50:02,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 462 transitions. [2024-11-22 13:50:02,851 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.33189655172413796 [2024-11-22 13:50:02,851 INFO L175 Difference]: Start difference. First operand has 499 places, 2405 transitions, 52446 flow. Second operand 58 states and 462 transitions. [2024-11-22 13:50:02,851 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 556 places, 3419 transitions, 81120 flow