./Ultimate.py --spec /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/properties/unreach-call.prp --file /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/popl20-queue-add-2.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 61a67961 Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/popl20-queue-add-2.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 8c3fe688d0e9a9929009fc24c8ef56c8fc1bfa15613131b287e178eb7d2f1f1e --- Real Ultimate output --- This is Ultimate 0.2.5-wip.fs.cvc5-61a6796-m [2024-10-14 14:42:56,332 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-10-14 14:42:56,444 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-10-14 14:42:56,447 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-10-14 14:42:56,448 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-10-14 14:42:56,474 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-10-14 14:42:56,475 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-10-14 14:42:56,475 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-10-14 14:42:56,476 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-10-14 14:42:56,477 INFO L153 SettingsManager]: * Use memory slicer=true [2024-10-14 14:42:56,477 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-10-14 14:42:56,478 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-10-14 14:42:56,478 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-10-14 14:42:56,479 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-10-14 14:42:56,479 INFO L153 SettingsManager]: * Use SBE=true [2024-10-14 14:42:56,480 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-10-14 14:42:56,480 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-10-14 14:42:56,481 INFO L153 SettingsManager]: * sizeof long=4 [2024-10-14 14:42:56,481 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-10-14 14:42:56,482 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-10-14 14:42:56,482 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-10-14 14:42:56,485 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-10-14 14:42:56,485 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-10-14 14:42:56,485 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-10-14 14:42:56,486 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-10-14 14:42:56,486 INFO L153 SettingsManager]: * sizeof long double=12 [2024-10-14 14:42:56,486 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-10-14 14:42:56,486 INFO L153 SettingsManager]: * Use constant arrays=true [2024-10-14 14:42:56,486 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-10-14 14:42:56,486 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-10-14 14:42:56,487 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-10-14 14:42:56,487 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-10-14 14:42:56,487 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-14 14:42:56,487 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-10-14 14:42:56,487 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-10-14 14:42:56,488 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-10-14 14:42:56,488 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-10-14 14:42:56,488 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-10-14 14:42:56,489 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-10-14 14:42:56,490 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-10-14 14:42:56,490 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-10-14 14:42:56,490 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-10-14 14:42:56,490 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 8c3fe688d0e9a9929009fc24c8ef56c8fc1bfa15613131b287e178eb7d2f1f1e [2024-10-14 14:42:56,738 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-10-14 14:42:56,761 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-10-14 14:42:56,763 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-10-14 14:42:56,764 INFO L270 PluginConnector]: Initializing CDTParser... [2024-10-14 14:42:56,765 INFO L274 PluginConnector]: CDTParser initialized [2024-10-14 14:42:56,766 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/popl20-queue-add-2.wvr.c [2024-10-14 14:42:58,147 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-10-14 14:42:58,335 INFO L384 CDTParser]: Found 1 translation units. [2024-10-14 14:42:58,336 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/popl20-queue-add-2.wvr.c [2024-10-14 14:42:58,346 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5977cd8f7/bff2496189094d2cba5a7419c2f3dad5/FLAGc864b82cc [2024-10-14 14:42:58,728 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5977cd8f7/bff2496189094d2cba5a7419c2f3dad5 [2024-10-14 14:42:58,730 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-10-14 14:42:58,732 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-10-14 14:42:58,733 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-10-14 14:42:58,733 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-10-14 14:42:58,739 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-10-14 14:42:58,740 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 02:42:58" (1/1) ... [2024-10-14 14:42:58,740 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6bd965c9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 02:42:58, skipping insertion in model container [2024-10-14 14:42:58,742 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 02:42:58" (1/1) ... [2024-10-14 14:42:58,766 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-10-14 14:42:58,955 WARN L248 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/popl20-queue-add-2.wvr.c[2722,2735] [2024-10-14 14:42:58,970 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-14 14:42:58,978 INFO L200 MainTranslator]: Completed pre-run [2024-10-14 14:42:58,999 WARN L248 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/popl20-queue-add-2.wvr.c[2722,2735] [2024-10-14 14:42:59,002 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-14 14:42:59,022 INFO L204 MainTranslator]: Completed translation [2024-10-14 14:42:59,025 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 02:42:59 WrapperNode [2024-10-14 14:42:59,026 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-10-14 14:42:59,027 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-10-14 14:42:59,027 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-10-14 14:42:59,027 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-10-14 14:42:59,034 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 02:42:59" (1/1) ... [2024-10-14 14:42:59,043 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 02:42:59" (1/1) ... [2024-10-14 14:42:59,073 INFO L138 Inliner]: procedures = 23, calls = 29, calls flagged for inlining = 12, calls inlined = 12, statements flattened = 149 [2024-10-14 14:42:59,073 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-10-14 14:42:59,074 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-10-14 14:42:59,074 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-10-14 14:42:59,074 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-10-14 14:42:59,089 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 02:42:59" (1/1) ... [2024-10-14 14:42:59,089 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 02:42:59" (1/1) ... [2024-10-14 14:42:59,095 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 02:42:59" (1/1) ... [2024-10-14 14:42:59,120 INFO L175 MemorySlicer]: Split 6 memory accesses to 2 slices as follows [2, 4]. 67 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0]. The 1 writes are split as follows [0, 1]. [2024-10-14 14:42:59,121 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 02:42:59" (1/1) ... [2024-10-14 14:42:59,121 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 02:42:59" (1/1) ... [2024-10-14 14:42:59,130 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 02:42:59" (1/1) ... [2024-10-14 14:42:59,133 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 02:42:59" (1/1) ... [2024-10-14 14:42:59,137 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 02:42:59" (1/1) ... [2024-10-14 14:42:59,138 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 02:42:59" (1/1) ... [2024-10-14 14:42:59,140 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-10-14 14:42:59,145 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-10-14 14:42:59,145 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-10-14 14:42:59,145 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-10-14 14:42:59,146 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 02:42:59" (1/1) ... [2024-10-14 14:42:59,152 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-14 14:42:59,162 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-14 14:42:59,176 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) [2024-10-14 14:42:59,179 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 [2024-10-14 14:42:59,229 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-10-14 14:42:59,229 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2024-10-14 14:42:59,230 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2024-10-14 14:42:59,230 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2024-10-14 14:42:59,230 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2024-10-14 14:42:59,230 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-10-14 14:42:59,230 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-10-14 14:42:59,231 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-10-14 14:42:59,231 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-10-14 14:42:59,232 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-10-14 14:42:59,232 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-10-14 14:42:59,233 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-10-14 14:42:59,233 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-10-14 14:42:59,233 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-10-14 14:42:59,233 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-10-14 14:42:59,233 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-10-14 14:42:59,236 WARN L207 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2024-10-14 14:42:59,324 INFO L238 CfgBuilder]: Building ICFG [2024-10-14 14:42:59,326 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-10-14 14:42:59,567 INFO L283 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2024-10-14 14:42:59,567 INFO L287 CfgBuilder]: Performing block encoding [2024-10-14 14:42:59,775 INFO L309 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-10-14 14:42:59,776 INFO L314 CfgBuilder]: Removed 3 assume(true) statements. [2024-10-14 14:42:59,776 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 02:42:59 BoogieIcfgContainer [2024-10-14 14:42:59,776 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-10-14 14:42:59,778 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-10-14 14:42:59,778 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-10-14 14:42:59,781 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-10-14 14:42:59,782 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.10 02:42:58" (1/3) ... [2024-10-14 14:42:59,785 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@60b4f57c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 02:42:59, skipping insertion in model container [2024-10-14 14:42:59,785 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 02:42:59" (2/3) ... [2024-10-14 14:42:59,785 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@60b4f57c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 02:42:59, skipping insertion in model container [2024-10-14 14:42:59,785 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 02:42:59" (3/3) ... [2024-10-14 14:42:59,786 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-queue-add-2.wvr.c [2024-10-14 14:42:59,802 INFO L209 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-10-14 14:42:59,803 INFO L149 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-10-14 14:42:59,803 INFO L484 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-10-14 14:42:59,848 INFO L143 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2024-10-14 14:42:59,885 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 32 places, 29 transitions, 72 flow [2024-10-14 14:42:59,911 INFO L124 PetriNetUnfolderBase]: 4/27 cut-off events. [2024-10-14 14:42:59,911 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-10-14 14:42:59,914 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36 conditions, 27 events. 4/27 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 37 event pairs, 0 based on Foata normal form. 0/22 useless extension candidates. Maximal degree in co-relation 20. Up to 2 conditions per place. [2024-10-14 14:42:59,914 INFO L82 GeneralOperation]: Start removeDead. Operand has 32 places, 29 transitions, 72 flow [2024-10-14 14:42:59,916 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 29 places, 26 transitions, 64 flow [2024-10-14 14:42:59,924 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-10-14 14:42:59,931 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;@30a22ba2, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-10-14 14:42:59,931 INFO L334 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2024-10-14 14:42:59,941 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-10-14 14:42:59,943 INFO L124 PetriNetUnfolderBase]: 4/25 cut-off events. [2024-10-14 14:42:59,943 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-10-14 14:42:59,943 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-14 14:42:59,944 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-14 14:42:59,945 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-14 14:42:59,949 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 14:42:59,950 INFO L85 PathProgramCache]: Analyzing trace with hash 898408006, now seen corresponding path program 1 times [2024-10-14 14:42:59,958 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 14:42:59,959 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [804549424] [2024-10-14 14:42:59,959 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 14:42:59,960 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 14:43:00,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 14:43:00,169 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-14 14:43:00,169 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 14:43:00,170 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [804549424] [2024-10-14 14:43:00,170 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [804549424] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-14 14:43:00,171 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-14 14:43:00,171 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-10-14 14:43:00,172 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1037187053] [2024-10-14 14:43:00,173 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-14 14:43:00,180 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2024-10-14 14:43:00,185 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 14:43:00,223 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2024-10-14 14:43:00,224 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-10-14 14:43:00,225 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 29 [2024-10-14 14:43:00,229 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 29 places, 26 transitions, 64 flow. Second operand has 2 states, 2 states have (on average 16.0) internal successors, (32), 2 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 14:43:00,229 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-14 14:43:00,229 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 29 [2024-10-14 14:43:00,230 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-14 14:43:00,321 INFO L124 PetriNetUnfolderBase]: 87/187 cut-off events. [2024-10-14 14:43:00,322 INFO L125 PetriNetUnfolderBase]: For 8/8 co-relation queries the response was YES. [2024-10-14 14:43:00,324 INFO L83 FinitePrefix]: Finished finitePrefix Result has 355 conditions, 187 events. 87/187 cut-off events. For 8/8 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 646 event pairs, 66 based on Foata normal form. 13/183 useless extension candidates. Maximal degree in co-relation 317. Up to 146 conditions per place. [2024-10-14 14:43:00,329 INFO L140 encePairwiseOnDemand]: 28/29 looper letters, 19 selfloop transitions, 0 changer transitions 0/25 dead transitions. [2024-10-14 14:43:00,329 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 30 places, 25 transitions, 100 flow [2024-10-14 14:43:00,331 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2024-10-14 14:43:00,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2024-10-14 14:43:00,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 36 transitions. [2024-10-14 14:43:00,342 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6206896551724138 [2024-10-14 14:43:00,345 INFO L175 Difference]: Start difference. First operand has 29 places, 26 transitions, 64 flow. Second operand 2 states and 36 transitions. [2024-10-14 14:43:00,346 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 30 places, 25 transitions, 100 flow [2024-10-14 14:43:00,348 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 26 places, 25 transitions, 92 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-10-14 14:43:00,350 INFO L231 Difference]: Finished difference. Result has 26 places, 25 transitions, 54 flow [2024-10-14 14:43:00,352 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=54, PETRI_DIFFERENCE_MINUEND_PLACES=25, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=25, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=54, PETRI_PLACES=26, PETRI_TRANSITIONS=25} [2024-10-14 14:43:00,357 INFO L277 CegarLoopForPetriNet]: 29 programPoint places, -3 predicate places. [2024-10-14 14:43:00,357 INFO L471 AbstractCegarLoop]: Abstraction has has 26 places, 25 transitions, 54 flow [2024-10-14 14:43:00,358 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 16.0) internal successors, (32), 2 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 14:43:00,358 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-14 14:43:00,358 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-14 14:43:00,358 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-10-14 14:43:00,358 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-14 14:43:00,359 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 14:43:00,359 INFO L85 PathProgramCache]: Analyzing trace with hash -1095861289, now seen corresponding path program 1 times [2024-10-14 14:43:00,359 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 14:43:00,359 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [96200619] [2024-10-14 14:43:00,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 14:43:00,360 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 14:43:00,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 14:43:00,674 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-14 14:43:00,674 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 14:43:00,675 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [96200619] [2024-10-14 14:43:00,675 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [96200619] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-14 14:43:00,675 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-14 14:43:00,675 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-10-14 14:43:00,675 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1590271155] [2024-10-14 14:43:00,676 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-14 14:43:00,677 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-10-14 14:43:00,677 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 14:43:00,678 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-10-14 14:43:00,678 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-10-14 14:43:00,678 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 29 [2024-10-14 14:43:00,679 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 26 places, 25 transitions, 54 flow. Second operand has 4 states, 4 states have (on average 12.0) internal successors, (48), 4 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 14:43:00,679 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-14 14:43:00,679 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 29 [2024-10-14 14:43:00,679 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-14 14:43:00,823 INFO L124 PetriNetUnfolderBase]: 100/227 cut-off events. [2024-10-14 14:43:00,824 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-10-14 14:43:00,826 INFO L83 FinitePrefix]: Finished finitePrefix Result has 419 conditions, 227 events. 100/227 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 832 event pairs, 79 based on Foata normal form. 17/228 useless extension candidates. Maximal degree in co-relation 416. Up to 146 conditions per place. [2024-10-14 14:43:00,827 INFO L140 encePairwiseOnDemand]: 23/29 looper letters, 18 selfloop transitions, 2 changer transitions 8/34 dead transitions. [2024-10-14 14:43:00,827 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 29 places, 34 transitions, 130 flow [2024-10-14 14:43:00,829 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-10-14 14:43:00,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-10-14 14:43:00,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 63 transitions. [2024-10-14 14:43:00,831 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5431034482758621 [2024-10-14 14:43:00,831 INFO L175 Difference]: Start difference. First operand has 26 places, 25 transitions, 54 flow. Second operand 4 states and 63 transitions. [2024-10-14 14:43:00,831 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 29 places, 34 transitions, 130 flow [2024-10-14 14:43:00,832 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 29 places, 34 transitions, 130 flow, removed 0 selfloop flow, removed 0 redundant places. [2024-10-14 14:43:00,836 INFO L231 Difference]: Finished difference. Result has 31 places, 26 transitions, 72 flow [2024-10-14 14:43:00,836 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=54, PETRI_DIFFERENCE_MINUEND_PLACES=26, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=25, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=72, PETRI_PLACES=31, PETRI_TRANSITIONS=26} [2024-10-14 14:43:00,837 INFO L277 CegarLoopForPetriNet]: 29 programPoint places, 2 predicate places. [2024-10-14 14:43:00,837 INFO L471 AbstractCegarLoop]: Abstraction has has 31 places, 26 transitions, 72 flow [2024-10-14 14:43:00,837 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 12.0) internal successors, (48), 4 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 14:43:00,837 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-14 14:43:00,837 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-14 14:43:00,838 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-10-14 14:43:00,838 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-14 14:43:00,840 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 14:43:00,841 INFO L85 PathProgramCache]: Analyzing trace with hash -798163703, now seen corresponding path program 1 times [2024-10-14 14:43:00,841 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 14:43:00,841 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1906544090] [2024-10-14 14:43:00,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 14:43:00,843 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 14:43:00,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 14:43:01,135 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-14 14:43:01,135 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 14:43:01,136 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1906544090] [2024-10-14 14:43:01,136 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1906544090] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-14 14:43:01,136 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-14 14:43:01,136 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-10-14 14:43:01,137 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1779528463] [2024-10-14 14:43:01,137 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-14 14:43:01,138 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-10-14 14:43:01,138 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 14:43:01,139 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-10-14 14:43:01,139 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2024-10-14 14:43:01,165 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 29 [2024-10-14 14:43:01,166 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 31 places, 26 transitions, 72 flow. Second operand has 8 states, 8 states have (on average 8.375) internal successors, (67), 8 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 14:43:01,166 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-14 14:43:01,166 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 29 [2024-10-14 14:43:01,167 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-14 14:43:01,365 INFO L124 PetriNetUnfolderBase]: 229/444 cut-off events. [2024-10-14 14:43:01,365 INFO L125 PetriNetUnfolderBase]: For 68/68 co-relation queries the response was YES. [2024-10-14 14:43:01,367 INFO L83 FinitePrefix]: Finished finitePrefix Result has 967 conditions, 444 events. 229/444 cut-off events. For 68/68 co-relation queries the response was YES. Maximal size of possible extension queue 38. Compared 1986 event pairs, 54 based on Foata normal form. 1/441 useless extension candidates. Maximal degree in co-relation 961. Up to 155 conditions per place. [2024-10-14 14:43:01,372 INFO L140 encePairwiseOnDemand]: 20/29 looper letters, 46 selfloop transitions, 9 changer transitions 7/66 dead transitions. [2024-10-14 14:43:01,372 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 37 places, 66 transitions, 303 flow [2024-10-14 14:43:01,372 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-10-14 14:43:01,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-10-14 14:43:01,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 110 transitions. [2024-10-14 14:43:01,376 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.47413793103448276 [2024-10-14 14:43:01,376 INFO L175 Difference]: Start difference. First operand has 31 places, 26 transitions, 72 flow. Second operand 8 states and 110 transitions. [2024-10-14 14:43:01,376 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 37 places, 66 transitions, 303 flow [2024-10-14 14:43:01,378 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 36 places, 66 transitions, 299 flow, removed 1 selfloop flow, removed 1 redundant places. [2024-10-14 14:43:01,381 INFO L231 Difference]: Finished difference. Result has 40 places, 33 transitions, 126 flow [2024-10-14 14:43:01,381 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=68, PETRI_DIFFERENCE_MINUEND_PLACES=29, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=26, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=19, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=126, PETRI_PLACES=40, PETRI_TRANSITIONS=33} [2024-10-14 14:43:01,381 INFO L277 CegarLoopForPetriNet]: 29 programPoint places, 11 predicate places. [2024-10-14 14:43:01,382 INFO L471 AbstractCegarLoop]: Abstraction has has 40 places, 33 transitions, 126 flow [2024-10-14 14:43:01,383 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.375) internal successors, (67), 8 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 14:43:01,383 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-14 14:43:01,383 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-14 14:43:01,383 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-10-14 14:43:01,383 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-14 14:43:01,384 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 14:43:01,384 INFO L85 PathProgramCache]: Analyzing trace with hash 1929446763, now seen corresponding path program 2 times [2024-10-14 14:43:01,384 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 14:43:01,384 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [919327426] [2024-10-14 14:43:01,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 14:43:01,385 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 14:43:01,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 14:43:01,461 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-14 14:43:01,461 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 14:43:01,462 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [919327426] [2024-10-14 14:43:01,462 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [919327426] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-14 14:43:01,463 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-14 14:43:01,463 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-10-14 14:43:01,463 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1937266987] [2024-10-14 14:43:01,463 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-14 14:43:01,464 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-14 14:43:01,464 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 14:43:01,465 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-14 14:43:01,466 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-14 14:43:01,466 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 29 [2024-10-14 14:43:01,466 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 40 places, 33 transitions, 126 flow. Second operand has 3 states, 3 states have (on average 13.666666666666666) internal successors, (41), 3 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 14:43:01,467 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-14 14:43:01,467 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 29 [2024-10-14 14:43:01,467 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-14 14:43:01,551 INFO L124 PetriNetUnfolderBase]: 145/326 cut-off events. [2024-10-14 14:43:01,552 INFO L125 PetriNetUnfolderBase]: For 182/186 co-relation queries the response was YES. [2024-10-14 14:43:01,554 INFO L83 FinitePrefix]: Finished finitePrefix Result has 825 conditions, 326 events. 145/326 cut-off events. For 182/186 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 1327 event pairs, 39 based on Foata normal form. 6/328 useless extension candidates. Maximal degree in co-relation 815. Up to 214 conditions per place. [2024-10-14 14:43:01,556 INFO L140 encePairwiseOnDemand]: 25/29 looper letters, 26 selfloop transitions, 3 changer transitions 0/38 dead transitions. [2024-10-14 14:43:01,556 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 41 places, 38 transitions, 197 flow [2024-10-14 14:43:01,556 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-14 14:43:01,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-10-14 14:43:01,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 51 transitions. [2024-10-14 14:43:01,558 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5862068965517241 [2024-10-14 14:43:01,558 INFO L175 Difference]: Start difference. First operand has 40 places, 33 transitions, 126 flow. Second operand 3 states and 51 transitions. [2024-10-14 14:43:01,558 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 41 places, 38 transitions, 197 flow [2024-10-14 14:43:01,559 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 38 places, 38 transitions, 187 flow, removed 2 selfloop flow, removed 3 redundant places. [2024-10-14 14:43:01,561 INFO L231 Difference]: Finished difference. Result has 39 places, 34 transitions, 135 flow [2024-10-14 14:43:01,562 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=112, PETRI_DIFFERENCE_MINUEND_PLACES=36, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=32, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=135, PETRI_PLACES=39, PETRI_TRANSITIONS=34} [2024-10-14 14:43:01,563 INFO L277 CegarLoopForPetriNet]: 29 programPoint places, 10 predicate places. [2024-10-14 14:43:01,563 INFO L471 AbstractCegarLoop]: Abstraction has has 39 places, 34 transitions, 135 flow [2024-10-14 14:43:01,563 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 13.666666666666666) internal successors, (41), 3 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 14:43:01,564 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-14 14:43:01,564 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-14 14:43:01,564 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-10-14 14:43:01,565 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-14 14:43:01,565 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 14:43:01,565 INFO L85 PathProgramCache]: Analyzing trace with hash -126642015, now seen corresponding path program 1 times [2024-10-14 14:43:01,566 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 14:43:01,566 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [858880831] [2024-10-14 14:43:01,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 14:43:01,566 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 14:43:01,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 14:43:01,710 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-14 14:43:01,710 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 14:43:01,711 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [858880831] [2024-10-14 14:43:01,711 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [858880831] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-14 14:43:01,711 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [210587870] [2024-10-14 14:43:01,711 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 14:43:01,712 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-14 14:43:01,712 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-14 14:43:01,714 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) [2024-10-14 14:43:01,715 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-10-14 14:43:01,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 14:43:01,790 INFO L255 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-10-14 14:43:01,794 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-14 14:43:01,900 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-14 14:43:01,901 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-14 14:43:01,997 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-14 14:43:01,998 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [210587870] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-14 14:43:01,998 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-14 14:43:01,998 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 11 [2024-10-14 14:43:01,998 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1891230756] [2024-10-14 14:43:01,998 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-14 14:43:01,999 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-10-14 14:43:01,999 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 14:43:01,999 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-10-14 14:43:01,999 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2024-10-14 14:43:02,000 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 29 [2024-10-14 14:43:02,000 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 39 places, 34 transitions, 135 flow. Second operand has 12 states, 12 states have (on average 10.75) internal successors, (129), 12 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 14:43:02,000 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-14 14:43:02,000 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 29 [2024-10-14 14:43:02,000 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-14 14:43:02,139 INFO L124 PetriNetUnfolderBase]: 244/562 cut-off events. [2024-10-14 14:43:02,139 INFO L125 PetriNetUnfolderBase]: For 558/597 co-relation queries the response was YES. [2024-10-14 14:43:02,142 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1515 conditions, 562 events. 244/562 cut-off events. For 558/597 co-relation queries the response was YES. Maximal size of possible extension queue 34. Compared 2830 event pairs, 137 based on Foata normal form. 26/560 useless extension candidates. Maximal degree in co-relation 1505. Up to 262 conditions per place. [2024-10-14 14:43:02,144 INFO L140 encePairwiseOnDemand]: 24/29 looper letters, 41 selfloop transitions, 5 changer transitions 4/59 dead transitions. [2024-10-14 14:43:02,144 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 59 transitions, 327 flow [2024-10-14 14:43:02,145 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-10-14 14:43:02,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-10-14 14:43:02,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 93 transitions. [2024-10-14 14:43:02,149 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5344827586206896 [2024-10-14 14:43:02,149 INFO L175 Difference]: Start difference. First operand has 39 places, 34 transitions, 135 flow. Second operand 6 states and 93 transitions. [2024-10-14 14:43:02,149 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 59 transitions, 327 flow [2024-10-14 14:43:02,152 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 59 transitions, 306 flow, removed 8 selfloop flow, removed 2 redundant places. [2024-10-14 14:43:02,154 INFO L231 Difference]: Finished difference. Result has 45 places, 37 transitions, 163 flow [2024-10-14 14:43:02,154 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=122, PETRI_DIFFERENCE_MINUEND_PLACES=37, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=34, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=163, PETRI_PLACES=45, PETRI_TRANSITIONS=37} [2024-10-14 14:43:02,155 INFO L277 CegarLoopForPetriNet]: 29 programPoint places, 16 predicate places. [2024-10-14 14:43:02,155 INFO L471 AbstractCegarLoop]: Abstraction has has 45 places, 37 transitions, 163 flow [2024-10-14 14:43:02,156 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 10.75) internal successors, (129), 12 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 14:43:02,156 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-14 14:43:02,156 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-14 14:43:02,177 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2024-10-14 14:43:02,363 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-14 14:43:02,364 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-14 14:43:02,365 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 14:43:02,365 INFO L85 PathProgramCache]: Analyzing trace with hash 1356069503, now seen corresponding path program 2 times [2024-10-14 14:43:02,365 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 14:43:02,365 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [573603014] [2024-10-14 14:43:02,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 14:43:02,365 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 14:43:02,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 14:43:03,098 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-14 14:43:03,099 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 14:43:03,099 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [573603014] [2024-10-14 14:43:03,100 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [573603014] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-14 14:43:03,100 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [957256595] [2024-10-14 14:43:03,100 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-14 14:43:03,100 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-14 14:43:03,100 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-14 14:43:03,102 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) [2024-10-14 14:43:03,104 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-10-14 14:43:03,196 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-14 14:43:03,197 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-14 14:43:03,198 INFO L255 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 23 conjuncts are in the unsatisfiable core [2024-10-14 14:43:03,200 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-14 14:43:03,483 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 11 treesize of output 3 [2024-10-14 14:43:03,529 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-14 14:43:03,532 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-14 14:43:03,729 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2024-10-14 14:43:03,729 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 11 [2024-10-14 14:43:03,943 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-14 14:43:03,944 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [957256595] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-14 14:43:03,944 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-14 14:43:03,944 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 8] total 21 [2024-10-14 14:43:03,944 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1861638600] [2024-10-14 14:43:03,944 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-14 14:43:03,945 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2024-10-14 14:43:03,945 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 14:43:03,945 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2024-10-14 14:43:03,946 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=355, Unknown=0, NotChecked=0, Total=462 [2024-10-14 14:43:04,003 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 29 [2024-10-14 14:43:04,003 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 37 transitions, 163 flow. Second operand has 22 states, 22 states have (on average 8.5) internal successors, (187), 22 states have internal predecessors, (187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 14:43:04,004 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-14 14:43:04,004 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 29 [2024-10-14 14:43:04,004 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-14 14:43:05,469 INFO L124 PetriNetUnfolderBase]: 745/1590 cut-off events. [2024-10-14 14:43:05,469 INFO L125 PetriNetUnfolderBase]: For 1144/1147 co-relation queries the response was YES. [2024-10-14 14:43:05,474 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4054 conditions, 1590 events. 745/1590 cut-off events. For 1144/1147 co-relation queries the response was YES. Maximal size of possible extension queue 90. Compared 9480 event pairs, 65 based on Foata normal form. 78/1662 useless extension candidates. Maximal degree in co-relation 4042. Up to 294 conditions per place. [2024-10-14 14:43:05,480 INFO L140 encePairwiseOnDemand]: 21/29 looper letters, 157 selfloop transitions, 39 changer transitions 16/219 dead transitions. [2024-10-14 14:43:05,480 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 219 transitions, 1224 flow [2024-10-14 14:43:05,481 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2024-10-14 14:43:05,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2024-10-14 14:43:05,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 391 transitions. [2024-10-14 14:43:05,485 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4815270935960591 [2024-10-14 14:43:05,486 INFO L175 Difference]: Start difference. First operand has 45 places, 37 transitions, 163 flow. Second operand 28 states and 391 transitions. [2024-10-14 14:43:05,486 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 219 transitions, 1224 flow [2024-10-14 14:43:05,494 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 69 places, 219 transitions, 1173 flow, removed 23 selfloop flow, removed 3 redundant places. [2024-10-14 14:43:05,497 INFO L231 Difference]: Finished difference. Result has 81 places, 74 transitions, 504 flow [2024-10-14 14:43:05,498 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=148, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=28, PETRI_FLOW=504, PETRI_PLACES=81, PETRI_TRANSITIONS=74} [2024-10-14 14:43:05,499 INFO L277 CegarLoopForPetriNet]: 29 programPoint places, 52 predicate places. [2024-10-14 14:43:05,500 INFO L471 AbstractCegarLoop]: Abstraction has has 81 places, 74 transitions, 504 flow [2024-10-14 14:43:05,500 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 8.5) internal successors, (187), 22 states have internal predecessors, (187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 14:43:05,500 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-14 14:43:05,500 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-14 14:43:05,519 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-10-14 14:43:05,700 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2024-10-14 14:43:05,701 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-14 14:43:05,702 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 14:43:05,702 INFO L85 PathProgramCache]: Analyzing trace with hash -623450337, now seen corresponding path program 1 times [2024-10-14 14:43:05,702 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 14:43:05,702 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [494836158] [2024-10-14 14:43:05,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 14:43:05,702 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 14:43:05,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 14:43:05,824 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-14 14:43:05,825 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 14:43:05,825 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [494836158] [2024-10-14 14:43:05,825 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [494836158] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-14 14:43:05,825 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1725549470] [2024-10-14 14:43:05,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 14:43:05,826 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-14 14:43:05,826 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-14 14:43:05,828 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) [2024-10-14 14:43:05,829 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-10-14 14:43:05,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 14:43:05,903 INFO L255 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 4 conjuncts are in the unsatisfiable core [2024-10-14 14:43:05,904 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-14 14:43:05,943 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-14 14:43:05,943 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-10-14 14:43:05,945 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1725549470] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-14 14:43:05,945 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-10-14 14:43:05,945 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 7 [2024-10-14 14:43:05,946 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1116880498] [2024-10-14 14:43:05,946 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-14 14:43:05,946 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-10-14 14:43:05,946 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 14:43:05,947 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-10-14 14:43:05,947 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-10-14 14:43:05,947 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 29 [2024-10-14 14:43:05,947 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 81 places, 74 transitions, 504 flow. Second operand has 4 states, 4 states have (on average 12.5) internal successors, (50), 4 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 14:43:05,947 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-14 14:43:05,947 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 29 [2024-10-14 14:43:05,947 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-14 14:43:06,186 INFO L124 PetriNetUnfolderBase]: 599/1528 cut-off events. [2024-10-14 14:43:06,186 INFO L125 PetriNetUnfolderBase]: For 5891/5974 co-relation queries the response was YES. [2024-10-14 14:43:06,190 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4832 conditions, 1528 events. 599/1528 cut-off events. For 5891/5974 co-relation queries the response was YES. Maximal size of possible extension queue 87. Compared 10262 event pairs, 150 based on Foata normal form. 39/1529 useless extension candidates. Maximal degree in co-relation 4809. Up to 609 conditions per place. [2024-10-14 14:43:06,196 INFO L140 encePairwiseOnDemand]: 25/29 looper letters, 63 selfloop transitions, 16 changer transitions 8/102 dead transitions. [2024-10-14 14:43:06,196 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 102 transitions, 837 flow [2024-10-14 14:43:06,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-10-14 14:43:06,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-10-14 14:43:06,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 79 transitions. [2024-10-14 14:43:06,197 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6810344827586207 [2024-10-14 14:43:06,197 INFO L175 Difference]: Start difference. First operand has 81 places, 74 transitions, 504 flow. Second operand 4 states and 79 transitions. [2024-10-14 14:43:06,198 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 102 transitions, 837 flow [2024-10-14 14:43:06,210 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 102 transitions, 698 flow, removed 64 selfloop flow, removed 7 redundant places. [2024-10-14 14:43:06,211 INFO L231 Difference]: Finished difference. Result has 77 places, 71 transitions, 489 flow [2024-10-14 14:43:06,212 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=361, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=71, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=489, PETRI_PLACES=77, PETRI_TRANSITIONS=71} [2024-10-14 14:43:06,212 INFO L277 CegarLoopForPetriNet]: 29 programPoint places, 48 predicate places. [2024-10-14 14:43:06,213 INFO L471 AbstractCegarLoop]: Abstraction has has 77 places, 71 transitions, 489 flow [2024-10-14 14:43:06,213 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 12.5) internal successors, (50), 4 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 14:43:06,213 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-14 14:43:06,213 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-14 14:43:06,230 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-10-14 14:43:06,414 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-14 14:43:06,414 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-14 14:43:06,415 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 14:43:06,415 INFO L85 PathProgramCache]: Analyzing trace with hash 1175512711, now seen corresponding path program 3 times [2024-10-14 14:43:06,415 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 14:43:06,415 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1001420042] [2024-10-14 14:43:06,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 14:43:06,415 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 14:43:06,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 14:43:06,830 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-14 14:43:06,830 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 14:43:06,830 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1001420042] [2024-10-14 14:43:06,830 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1001420042] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-14 14:43:06,832 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1564114778] [2024-10-14 14:43:06,833 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-10-14 14:43:06,834 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-14 14:43:06,834 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-14 14:43:06,835 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) [2024-10-14 14:43:06,838 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-10-14 14:43:06,923 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-10-14 14:43:06,924 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-14 14:43:06,925 INFO L255 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 25 conjuncts are in the unsatisfiable core [2024-10-14 14:43:06,927 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-14 14:43:07,195 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-14 14:43:07,195 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-14 14:43:07,330 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2024-10-14 14:43:07,330 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 12 [2024-10-14 14:43:07,566 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-14 14:43:07,567 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1564114778] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-14 14:43:07,567 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-14 14:43:07,567 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 21 [2024-10-14 14:43:07,567 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [244041324] [2024-10-14 14:43:07,567 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-14 14:43:07,568 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2024-10-14 14:43:07,568 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 14:43:07,568 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2024-10-14 14:43:07,569 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=370, Unknown=0, NotChecked=0, Total=462 [2024-10-14 14:43:07,595 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 29 [2024-10-14 14:43:07,596 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 77 places, 71 transitions, 489 flow. Second operand has 22 states, 22 states have (on average 8.454545454545455) internal successors, (186), 22 states have internal predecessors, (186), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 14:43:07,596 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-14 14:43:07,596 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 29 [2024-10-14 14:43:07,596 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-14 14:43:08,716 INFO L124 PetriNetUnfolderBase]: 1228/2529 cut-off events. [2024-10-14 14:43:08,716 INFO L125 PetriNetUnfolderBase]: For 13199/13199 co-relation queries the response was YES. [2024-10-14 14:43:08,723 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8764 conditions, 2529 events. 1228/2529 cut-off events. For 13199/13199 co-relation queries the response was YES. Maximal size of possible extension queue 131. Compared 16215 event pairs, 120 based on Foata normal form. 93/2605 useless extension candidates. Maximal degree in co-relation 8743. Up to 546 conditions per place. [2024-10-14 14:43:08,737 INFO L140 encePairwiseOnDemand]: 21/29 looper letters, 142 selfloop transitions, 62 changer transitions 1/211 dead transitions. [2024-10-14 14:43:08,738 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 89 places, 211 transitions, 1889 flow [2024-10-14 14:43:08,738 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2024-10-14 14:43:08,738 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2024-10-14 14:43:08,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 282 transitions. [2024-10-14 14:43:08,740 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4862068965517241 [2024-10-14 14:43:08,740 INFO L175 Difference]: Start difference. First operand has 77 places, 71 transitions, 489 flow. Second operand 20 states and 282 transitions. [2024-10-14 14:43:08,740 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 89 places, 211 transitions, 1889 flow [2024-10-14 14:43:08,765 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 86 places, 211 transitions, 1647 flow, removed 121 selfloop flow, removed 3 redundant places. [2024-10-14 14:43:08,768 INFO L231 Difference]: Finished difference. Result has 97 places, 103 transitions, 1020 flow [2024-10-14 14:43:08,768 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=416, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=70, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=1020, PETRI_PLACES=97, PETRI_TRANSITIONS=103} [2024-10-14 14:43:08,769 INFO L277 CegarLoopForPetriNet]: 29 programPoint places, 68 predicate places. [2024-10-14 14:43:08,769 INFO L471 AbstractCegarLoop]: Abstraction has has 97 places, 103 transitions, 1020 flow [2024-10-14 14:43:08,769 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 8.454545454545455) internal successors, (186), 22 states have internal predecessors, (186), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 14:43:08,770 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-14 14:43:08,770 INFO L204 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-14 14:43:08,787 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2024-10-14 14:43:08,973 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-14 14:43:08,974 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-14 14:43:08,974 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 14:43:08,975 INFO L85 PathProgramCache]: Analyzing trace with hash -1810261713, now seen corresponding path program 4 times [2024-10-14 14:43:08,975 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 14:43:08,975 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [851969014] [2024-10-14 14:43:08,975 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 14:43:08,975 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 14:43:09,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 14:43:09,850 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-14 14:43:09,851 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 14:43:09,851 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [851969014] [2024-10-14 14:43:09,852 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [851969014] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-14 14:43:09,852 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [230633254] [2024-10-14 14:43:09,852 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-10-14 14:43:09,852 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-14 14:43:09,853 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-14 14:43:09,854 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) [2024-10-14 14:43:09,856 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-10-14 14:43:09,939 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-10-14 14:43:09,939 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-14 14:43:09,941 INFO L255 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 17 conjuncts are in the unsatisfiable core [2024-10-14 14:43:09,942 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-14 14:43:10,054 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-14 14:43:10,055 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-14 14:43:10,088 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2024-10-14 14:43:10,089 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 12 [2024-10-14 14:43:10,108 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-10-14 14:43:10,108 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [230633254] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-14 14:43:10,108 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-14 14:43:10,109 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 6, 4] total 15 [2024-10-14 14:43:10,109 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1029384966] [2024-10-14 14:43:10,109 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-14 14:43:10,109 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-10-14 14:43:10,111 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 14:43:10,111 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-10-14 14:43:10,111 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=203, Unknown=0, NotChecked=0, Total=240 [2024-10-14 14:43:10,145 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 29 [2024-10-14 14:43:10,146 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 97 places, 103 transitions, 1020 flow. Second operand has 16 states, 16 states have (on average 8.8125) internal successors, (141), 16 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 14:43:10,146 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-14 14:43:10,146 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 29 [2024-10-14 14:43:10,146 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-14 14:43:10,911 INFO L124 PetriNetUnfolderBase]: 1366/2825 cut-off events. [2024-10-14 14:43:10,911 INFO L125 PetriNetUnfolderBase]: For 21530/21530 co-relation queries the response was YES. [2024-10-14 14:43:10,919 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11364 conditions, 2825 events. 1366/2825 cut-off events. For 21530/21530 co-relation queries the response was YES. Maximal size of possible extension queue 128. Compared 18335 event pairs, 181 based on Foata normal form. 56/2878 useless extension candidates. Maximal degree in co-relation 11335. Up to 940 conditions per place. [2024-10-14 14:43:10,936 INFO L140 encePairwiseOnDemand]: 22/29 looper letters, 122 selfloop transitions, 51 changer transitions 0/179 dead transitions. [2024-10-14 14:43:10,936 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 108 places, 179 transitions, 2067 flow [2024-10-14 14:43:10,936 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-10-14 14:43:10,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-10-14 14:43:10,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 163 transitions. [2024-10-14 14:43:10,938 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4323607427055703 [2024-10-14 14:43:10,938 INFO L175 Difference]: Start difference. First operand has 97 places, 103 transitions, 1020 flow. Second operand 13 states and 163 transitions. [2024-10-14 14:43:10,938 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 108 places, 179 transitions, 2067 flow [2024-10-14 14:43:10,990 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 100 places, 179 transitions, 1821 flow, removed 113 selfloop flow, removed 8 redundant places. [2024-10-14 14:43:10,994 INFO L231 Difference]: Finished difference. Result has 101 places, 112 transitions, 1075 flow [2024-10-14 14:43:10,994 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=815, PETRI_DIFFERENCE_MINUEND_PLACES=88, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=102, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=1075, PETRI_PLACES=101, PETRI_TRANSITIONS=112} [2024-10-14 14:43:10,995 INFO L277 CegarLoopForPetriNet]: 29 programPoint places, 72 predicate places. [2024-10-14 14:43:10,995 INFO L471 AbstractCegarLoop]: Abstraction has has 101 places, 112 transitions, 1075 flow [2024-10-14 14:43:10,996 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 8.8125) internal successors, (141), 16 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 14:43:10,996 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-14 14:43:10,996 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-14 14:43:11,013 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-10-14 14:43:11,200 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-14 14:43:11,201 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-14 14:43:11,201 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 14:43:11,201 INFO L85 PathProgramCache]: Analyzing trace with hash 1600182161, now seen corresponding path program 1 times [2024-10-14 14:43:11,201 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 14:43:11,202 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1359024646] [2024-10-14 14:43:11,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 14:43:11,202 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 14:43:11,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 14:43:11,891 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-14 14:43:11,892 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 14:43:11,892 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1359024646] [2024-10-14 14:43:11,892 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1359024646] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-14 14:43:11,892 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [392589837] [2024-10-14 14:43:11,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 14:43:11,893 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-14 14:43:11,893 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-14 14:43:11,894 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) [2024-10-14 14:43:11,896 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-10-14 14:43:11,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 14:43:11,982 INFO L255 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 34 conjuncts are in the unsatisfiable core [2024-10-14 14:43:11,984 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-14 14:43:12,536 INFO L349 Elim1Store]: treesize reduction 7, result has 30.0 percent of original size [2024-10-14 14:43:12,537 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 10 [2024-10-14 14:43:12,641 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-14 14:43:12,641 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-14 14:43:12,976 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-14 14:43:12,976 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 18 [2024-10-14 14:43:13,349 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-14 14:43:13,350 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [392589837] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-14 14:43:13,350 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-14 14:43:13,350 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14, 14] total 40 [2024-10-14 14:43:13,350 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1103580167] [2024-10-14 14:43:13,350 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-14 14:43:13,351 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2024-10-14 14:43:13,351 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 14:43:13,352 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2024-10-14 14:43:13,353 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=175, Invalid=1465, Unknown=0, NotChecked=0, Total=1640 [2024-10-14 14:43:13,376 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 29 [2024-10-14 14:43:13,377 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 101 places, 112 transitions, 1075 flow. Second operand has 41 states, 41 states have (on average 5.829268292682927) internal successors, (239), 41 states have internal predecessors, (239), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 14:43:13,377 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-14 14:43:13,377 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 29 [2024-10-14 14:43:13,377 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-14 14:43:17,990 INFO L124 PetriNetUnfolderBase]: 3311/6201 cut-off events. [2024-10-14 14:43:17,990 INFO L125 PetriNetUnfolderBase]: For 42325/42325 co-relation queries the response was YES. [2024-10-14 14:43:18,010 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24742 conditions, 6201 events. 3311/6201 cut-off events. For 42325/42325 co-relation queries the response was YES. Maximal size of possible extension queue 205. Compared 40877 event pairs, 303 based on Foata normal form. 7/6208 useless extension candidates. Maximal degree in co-relation 24713. Up to 2249 conditions per place. [2024-10-14 14:43:18,039 INFO L140 encePairwiseOnDemand]: 15/29 looper letters, 291 selfloop transitions, 183 changer transitions 63/539 dead transitions. [2024-10-14 14:43:18,039 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 164 places, 539 transitions, 4983 flow [2024-10-14 14:43:18,040 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2024-10-14 14:43:18,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2024-10-14 14:43:18,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 615 transitions. [2024-10-14 14:43:18,043 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.33135775862068967 [2024-10-14 14:43:18,043 INFO L175 Difference]: Start difference. First operand has 101 places, 112 transitions, 1075 flow. Second operand 64 states and 615 transitions. [2024-10-14 14:43:18,043 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 164 places, 539 transitions, 4983 flow [2024-10-14 14:43:18,139 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 159 places, 539 transitions, 4969 flow, removed 0 selfloop flow, removed 5 redundant places. [2024-10-14 14:43:18,146 INFO L231 Difference]: Finished difference. Result has 186 places, 267 transitions, 3114 flow [2024-10-14 14:43:18,146 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=1061, PETRI_DIFFERENCE_MINUEND_PLACES=96, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=112, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=64, PETRI_FLOW=3114, PETRI_PLACES=186, PETRI_TRANSITIONS=267} [2024-10-14 14:43:18,147 INFO L277 CegarLoopForPetriNet]: 29 programPoint places, 157 predicate places. [2024-10-14 14:43:18,147 INFO L471 AbstractCegarLoop]: Abstraction has has 186 places, 267 transitions, 3114 flow [2024-10-14 14:43:18,147 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 5.829268292682927) internal successors, (239), 41 states have internal predecessors, (239), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 14:43:18,148 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-14 14:43:18,148 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-14 14:43:18,165 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-10-14 14:43:18,351 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-14 14:43:18,352 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-14 14:43:18,352 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 14:43:18,353 INFO L85 PathProgramCache]: Analyzing trace with hash -1183298053, now seen corresponding path program 2 times [2024-10-14 14:43:18,353 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 14:43:18,353 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1202214824] [2024-10-14 14:43:18,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 14:43:18,353 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 14:43:18,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 14:43:19,126 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-14 14:43:19,126 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 14:43:19,127 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1202214824] [2024-10-14 14:43:19,127 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1202214824] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-14 14:43:19,127 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1398008034] [2024-10-14 14:43:19,127 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-14 14:43:19,127 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-14 14:43:19,127 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-14 14:43:19,128 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) [2024-10-14 14:43:19,129 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-10-14 14:43:19,196 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-14 14:43:19,196 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-14 14:43:19,198 INFO L255 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 35 conjuncts are in the unsatisfiable core [2024-10-14 14:43:19,200 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-14 14:43:19,480 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 3 [2024-10-14 14:43:19,654 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-14 14:43:19,654 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-14 14:43:19,924 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-14 14:43:19,925 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 18 [2024-10-14 14:43:20,255 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-14 14:43:20,255 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1398008034] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-14 14:43:20,255 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-14 14:43:20,255 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14, 14] total 40 [2024-10-14 14:43:20,255 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1207404815] [2024-10-14 14:43:20,255 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-14 14:43:20,256 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2024-10-14 14:43:20,256 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 14:43:20,257 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2024-10-14 14:43:20,257 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=217, Invalid=1423, Unknown=0, NotChecked=0, Total=1640 [2024-10-14 14:43:20,268 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 29 [2024-10-14 14:43:20,269 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 186 places, 267 transitions, 3114 flow. Second operand has 41 states, 41 states have (on average 5.804878048780488) internal successors, (238), 41 states have internal predecessors, (238), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 14:43:20,269 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-14 14:43:20,269 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 29 [2024-10-14 14:43:20,269 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-14 14:43:25,142 INFO L124 PetriNetUnfolderBase]: 4293/8117 cut-off events. [2024-10-14 14:43:25,143 INFO L125 PetriNetUnfolderBase]: For 92982/92982 co-relation queries the response was YES. [2024-10-14 14:43:25,173 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41512 conditions, 8117 events. 4293/8117 cut-off events. For 92982/92982 co-relation queries the response was YES. Maximal size of possible extension queue 336. Compared 58215 event pairs, 262 based on Foata normal form. 4/8121 useless extension candidates. Maximal degree in co-relation 41456. Up to 2373 conditions per place. [2024-10-14 14:43:25,209 INFO L140 encePairwiseOnDemand]: 13/29 looper letters, 284 selfloop transitions, 504 changer transitions 65/855 dead transitions. [2024-10-14 14:43:25,209 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 243 places, 855 transitions, 10586 flow [2024-10-14 14:43:25,210 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2024-10-14 14:43:25,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2024-10-14 14:43:25,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 659 transitions. [2024-10-14 14:43:25,213 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.3341784989858012 [2024-10-14 14:43:25,213 INFO L175 Difference]: Start difference. First operand has 186 places, 267 transitions, 3114 flow. Second operand 68 states and 659 transitions. [2024-10-14 14:43:25,213 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 243 places, 855 transitions, 10586 flow [2024-10-14 14:43:25,568 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 233 places, 855 transitions, 10096 flow, removed 232 selfloop flow, removed 10 redundant places. [2024-10-14 14:43:25,588 INFO L231 Difference]: Finished difference. Result has 257 places, 609 transitions, 8727 flow [2024-10-14 14:43:25,589 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=2843, PETRI_DIFFERENCE_MINUEND_PLACES=166, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=267, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=199, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=68, PETRI_FLOW=8727, PETRI_PLACES=257, PETRI_TRANSITIONS=609} [2024-10-14 14:43:25,590 INFO L277 CegarLoopForPetriNet]: 29 programPoint places, 228 predicate places. [2024-10-14 14:43:25,590 INFO L471 AbstractCegarLoop]: Abstraction has has 257 places, 609 transitions, 8727 flow [2024-10-14 14:43:25,590 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 5.804878048780488) internal successors, (238), 41 states have internal predecessors, (238), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 14:43:25,590 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-14 14:43:25,591 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-14 14:43:25,608 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2024-10-14 14:43:25,791 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-14 14:43:25,792 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-14 14:43:25,792 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 14:43:25,793 INFO L85 PathProgramCache]: Analyzing trace with hash -166545805, now seen corresponding path program 3 times [2024-10-14 14:43:25,793 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 14:43:25,794 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1842629666] [2024-10-14 14:43:25,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 14:43:25,794 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 14:43:25,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 14:43:26,645 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-14 14:43:26,645 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 14:43:26,645 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1842629666] [2024-10-14 14:43:26,646 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1842629666] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-14 14:43:26,646 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [699128564] [2024-10-14 14:43:26,646 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-10-14 14:43:26,646 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-14 14:43:26,646 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-14 14:43:26,648 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) [2024-10-14 14:43:26,649 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-10-14 14:43:26,728 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-10-14 14:43:26,729 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-14 14:43:26,730 INFO L255 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 38 conjuncts are in the unsatisfiable core [2024-10-14 14:43:26,732 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-14 14:43:27,090 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 11 treesize of output 3 [2024-10-14 14:43:27,238 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-14 14:43:27,238 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-14 14:43:27,470 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-14 14:43:27,470 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 18 [2024-10-14 14:43:27,786 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-14 14:43:27,786 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [699128564] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-14 14:43:27,786 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-14 14:43:27,787 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14, 14] total 41 [2024-10-14 14:43:27,787 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [570041346] [2024-10-14 14:43:27,787 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-14 14:43:27,787 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2024-10-14 14:43:27,788 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 14:43:27,788 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2024-10-14 14:43:27,789 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=233, Invalid=1489, Unknown=0, NotChecked=0, Total=1722 [2024-10-14 14:43:27,817 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 29 [2024-10-14 14:43:27,818 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 257 places, 609 transitions, 8727 flow. Second operand has 42 states, 42 states have (on average 5.785714285714286) internal successors, (243), 42 states have internal predecessors, (243), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 14:43:27,818 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-14 14:43:27,818 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 29 [2024-10-14 14:43:27,818 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-14 14:43:32,376 INFO L124 PetriNetUnfolderBase]: 4373/8293 cut-off events. [2024-10-14 14:43:32,376 INFO L125 PetriNetUnfolderBase]: For 144537/144537 co-relation queries the response was YES. [2024-10-14 14:43:32,417 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51605 conditions, 8293 events. 4373/8293 cut-off events. For 144537/144537 co-relation queries the response was YES. Maximal size of possible extension queue 347. Compared 59708 event pairs, 349 based on Foata normal form. 4/8291 useless extension candidates. Maximal degree in co-relation 51529. Up to 3868 conditions per place. [2024-10-14 14:43:32,476 INFO L140 encePairwiseOnDemand]: 13/29 looper letters, 305 selfloop transitions, 527 changer transitions 66/900 dead transitions. [2024-10-14 14:43:32,476 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 309 places, 900 transitions, 13380 flow [2024-10-14 14:43:32,477 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2024-10-14 14:43:32,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2024-10-14 14:43:32,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 573 transitions. [2024-10-14 14:43:32,480 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.323911814584511 [2024-10-14 14:43:32,480 INFO L175 Difference]: Start difference. First operand has 257 places, 609 transitions, 8727 flow. Second operand 61 states and 573 transitions. [2024-10-14 14:43:32,480 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 309 places, 900 transitions, 13380 flow [2024-10-14 14:43:33,386 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 285 places, 900 transitions, 12668 flow, removed 313 selfloop flow, removed 24 redundant places. [2024-10-14 14:43:33,398 INFO L231 Difference]: Finished difference. Result has 305 places, 704 transitions, 11515 flow [2024-10-14 14:43:33,398 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=8160, PETRI_DIFFERENCE_MINUEND_PLACES=225, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=609, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=421, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=144, PETRI_DIFFERENCE_SUBTRAHEND_STATES=61, PETRI_FLOW=11515, PETRI_PLACES=305, PETRI_TRANSITIONS=704} [2024-10-14 14:43:33,399 INFO L277 CegarLoopForPetriNet]: 29 programPoint places, 276 predicate places. [2024-10-14 14:43:33,399 INFO L471 AbstractCegarLoop]: Abstraction has has 305 places, 704 transitions, 11515 flow [2024-10-14 14:43:33,400 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 5.785714285714286) internal successors, (243), 42 states have internal predecessors, (243), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 14:43:33,400 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-14 14:43:33,400 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-14 14:43:33,412 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2024-10-14 14:43:33,600 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2024-10-14 14:43:33,601 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-14 14:43:33,601 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 14:43:33,601 INFO L85 PathProgramCache]: Analyzing trace with hash 765896801, now seen corresponding path program 4 times [2024-10-14 14:43:33,601 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 14:43:33,601 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [480639371] [2024-10-14 14:43:33,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 14:43:33,601 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 14:43:33,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 14:43:34,270 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-14 14:43:34,270 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 14:43:34,270 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [480639371] [2024-10-14 14:43:34,270 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [480639371] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-14 14:43:34,270 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1848494276] [2024-10-14 14:43:34,271 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-10-14 14:43:34,271 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-14 14:43:34,271 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-14 14:43:34,273 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) [2024-10-14 14:43:34,274 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-10-14 14:43:34,343 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-10-14 14:43:34,344 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-14 14:43:34,345 INFO L255 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 32 conjuncts are in the unsatisfiable core [2024-10-14 14:43:34,347 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-14 14:43:34,627 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 11 treesize of output 3 [2024-10-14 14:43:34,873 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-14 14:43:34,873 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-14 14:43:35,157 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-14 14:43:35,158 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 18 [2024-10-14 14:43:35,468 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-14 14:43:35,468 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1848494276] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-14 14:43:35,468 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-14 14:43:35,468 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14, 14] total 41 [2024-10-14 14:43:35,469 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1265848693] [2024-10-14 14:43:35,469 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-14 14:43:35,469 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2024-10-14 14:43:35,469 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 14:43:35,470 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2024-10-14 14:43:35,470 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=218, Invalid=1504, Unknown=0, NotChecked=0, Total=1722 [2024-10-14 14:43:35,497 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 29 [2024-10-14 14:43:35,497 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 305 places, 704 transitions, 11515 flow. Second operand has 42 states, 42 states have (on average 5.738095238095238) internal successors, (241), 42 states have internal predecessors, (241), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 14:43:35,497 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-14 14:43:35,497 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 29 [2024-10-14 14:43:35,497 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-14 14:43:39,082 INFO L124 PetriNetUnfolderBase]: 4379/8261 cut-off events. [2024-10-14 14:43:39,082 INFO L125 PetriNetUnfolderBase]: For 164170/164170 co-relation queries the response was YES. [2024-10-14 14:43:39,121 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56445 conditions, 8261 events. 4379/8261 cut-off events. For 164170/164170 co-relation queries the response was YES. Maximal size of possible extension queue 348. Compared 59152 event pairs, 427 based on Foata normal form. 5/8266 useless extension candidates. Maximal degree in co-relation 56358. Up to 4128 conditions per place. [2024-10-14 14:43:39,162 INFO L140 encePairwiseOnDemand]: 15/29 looper letters, 382 selfloop transitions, 429 changer transitions 58/871 dead transitions. [2024-10-14 14:43:39,162 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 324 places, 871 transitions, 15007 flow [2024-10-14 14:43:39,163 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2024-10-14 14:43:39,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2024-10-14 14:43:39,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 348 transitions. [2024-10-14 14:43:39,164 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.3157894736842105 [2024-10-14 14:43:39,164 INFO L175 Difference]: Start difference. First operand has 305 places, 704 transitions, 11515 flow. Second operand 38 states and 348 transitions. [2024-10-14 14:43:39,164 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 324 places, 871 transitions, 15007 flow [2024-10-14 14:43:40,017 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 299 places, 871 transitions, 14682 flow, removed 119 selfloop flow, removed 25 redundant places. [2024-10-14 14:43:40,029 INFO L231 Difference]: Finished difference. Result has 311 places, 724 transitions, 13277 flow [2024-10-14 14:43:40,030 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=11219, PETRI_DIFFERENCE_MINUEND_PLACES=262, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=704, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=403, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=286, PETRI_DIFFERENCE_SUBTRAHEND_STATES=38, PETRI_FLOW=13277, PETRI_PLACES=311, PETRI_TRANSITIONS=724} [2024-10-14 14:43:40,030 INFO L277 CegarLoopForPetriNet]: 29 programPoint places, 282 predicate places. [2024-10-14 14:43:40,031 INFO L471 AbstractCegarLoop]: Abstraction has has 311 places, 724 transitions, 13277 flow [2024-10-14 14:43:40,031 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 5.738095238095238) internal successors, (241), 42 states have internal predecessors, (241), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 14:43:40,031 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-14 14:43:40,031 INFO L204 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-14 14:43:40,043 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2024-10-14 14:43:40,231 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2024-10-14 14:43:40,232 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-14 14:43:40,232 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 14:43:40,232 INFO L85 PathProgramCache]: Analyzing trace with hash -1194612045, now seen corresponding path program 5 times [2024-10-14 14:43:40,232 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 14:43:40,232 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [522767686] [2024-10-14 14:43:40,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 14:43:40,233 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 14:43:40,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 14:43:41,128 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-14 14:43:41,128 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 14:43:41,128 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [522767686] [2024-10-14 14:43:41,129 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [522767686] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-14 14:43:41,129 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1648089168] [2024-10-14 14:43:41,129 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-10-14 14:43:41,129 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-14 14:43:41,129 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-14 14:43:41,130 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) [2024-10-14 14:43:41,131 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-10-14 14:43:41,198 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2024-10-14 14:43:41,198 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-14 14:43:41,199 INFO L255 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 25 conjuncts are in the unsatisfiable core [2024-10-14 14:43:41,201 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-14 14:43:41,458 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-10-14 14:43:41,458 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-14 14:43:41,597 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-14 14:43:41,598 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 18 [2024-10-14 14:43:41,675 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-10-14 14:43:41,675 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1648089168] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-14 14:43:41,676 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-14 14:43:41,676 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 11, 10] total 34 [2024-10-14 14:43:41,676 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [107911217] [2024-10-14 14:43:41,676 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-14 14:43:41,676 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2024-10-14 14:43:41,677 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 14:43:41,677 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2024-10-14 14:43:41,677 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=1074, Unknown=0, NotChecked=0, Total=1190 [2024-10-14 14:43:41,710 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 29 [2024-10-14 14:43:41,710 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 311 places, 724 transitions, 13277 flow. Second operand has 35 states, 35 states have (on average 5.914285714285715) internal successors, (207), 35 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) [2024-10-14 14:43:41,710 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-14 14:43:41,710 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 29 [2024-10-14 14:43:41,711 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-14 14:43:44,735 INFO L124 PetriNetUnfolderBase]: 4453/8356 cut-off events. [2024-10-14 14:43:44,735 INFO L125 PetriNetUnfolderBase]: For 200002/200002 co-relation queries the response was YES. [2024-10-14 14:43:44,778 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62839 conditions, 8356 events. 4453/8356 cut-off events. For 200002/200002 co-relation queries the response was YES. Maximal size of possible extension queue 349. Compared 59698 event pairs, 434 based on Foata normal form. 1/8357 useless extension candidates. Maximal degree in co-relation 62748. Up to 3836 conditions per place. [2024-10-14 14:43:44,900 INFO L140 encePairwiseOnDemand]: 16/29 looper letters, 453 selfloop transitions, 423 changer transitions 26/904 dead transitions. [2024-10-14 14:43:44,901 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 324 places, 904 transitions, 17232 flow [2024-10-14 14:43:44,901 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2024-10-14 14:43:44,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2024-10-14 14:43:44,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 284 transitions. [2024-10-14 14:43:44,902 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.3497536945812808 [2024-10-14 14:43:44,902 INFO L175 Difference]: Start difference. First operand has 311 places, 724 transitions, 13277 flow. Second operand 28 states and 284 transitions. [2024-10-14 14:43:44,902 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 324 places, 904 transitions, 17232 flow [2024-10-14 14:43:45,893 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 302 places, 904 transitions, 16926 flow, removed 117 selfloop flow, removed 22 redundant places. [2024-10-14 14:43:45,906 INFO L231 Difference]: Finished difference. Result has 310 places, 757 transitions, 14932 flow [2024-10-14 14:43:45,906 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=13034, PETRI_DIFFERENCE_MINUEND_PLACES=275, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=724, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=389, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=322, PETRI_DIFFERENCE_SUBTRAHEND_STATES=28, PETRI_FLOW=14932, PETRI_PLACES=310, PETRI_TRANSITIONS=757} [2024-10-14 14:43:45,906 INFO L277 CegarLoopForPetriNet]: 29 programPoint places, 281 predicate places. [2024-10-14 14:43:45,907 INFO L471 AbstractCegarLoop]: Abstraction has has 310 places, 757 transitions, 14932 flow [2024-10-14 14:43:45,907 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 5.914285714285715) internal successors, (207), 35 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) [2024-10-14 14:43:45,907 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-14 14:43:45,907 INFO L204 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-14 14:43:45,920 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2024-10-14 14:43:46,108 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2024-10-14 14:43:46,108 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-14 14:43:46,108 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 14:43:46,108 INFO L85 PathProgramCache]: Analyzing trace with hash 467599359, now seen corresponding path program 6 times [2024-10-14 14:43:46,108 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 14:43:46,109 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [57294841] [2024-10-14 14:43:46,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 14:43:46,109 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 14:43:46,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 14:43:46,849 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-14 14:43:46,850 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 14:43:46,850 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [57294841] [2024-10-14 14:43:46,850 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [57294841] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-14 14:43:46,850 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1736253187] [2024-10-14 14:43:46,850 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-10-14 14:43:46,850 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-14 14:43:46,850 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-14 14:43:46,852 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) [2024-10-14 14:43:46,853 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-10-14 14:43:46,917 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2024-10-14 14:43:46,917 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-14 14:43:46,918 INFO L255 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 30 conjuncts are in the unsatisfiable core [2024-10-14 14:43:46,919 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-14 14:43:47,275 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-14 14:43:47,276 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-14 14:43:47,470 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-14 14:43:47,471 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 37 treesize of output 21 [2024-10-14 14:43:47,555 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-10-14 14:43:47,555 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1736253187] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-14 14:43:47,555 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-14 14:43:47,556 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 13, 11] total 37 [2024-10-14 14:43:47,556 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1449542283] [2024-10-14 14:43:47,556 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-14 14:43:47,556 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2024-10-14 14:43:47,557 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 14:43:47,557 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2024-10-14 14:43:47,557 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=133, Invalid=1273, Unknown=0, NotChecked=0, Total=1406 [2024-10-14 14:43:47,574 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 29 [2024-10-14 14:43:47,575 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 310 places, 757 transitions, 14932 flow. Second operand has 38 states, 38 states have (on average 5.7631578947368425) internal successors, (219), 38 states have internal predecessors, (219), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 14:43:47,575 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-14 14:43:47,575 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 29 [2024-10-14 14:43:47,575 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-14 14:43:50,911 INFO L124 PetriNetUnfolderBase]: 4412/8260 cut-off events. [2024-10-14 14:43:50,911 INFO L125 PetriNetUnfolderBase]: For 225742/225742 co-relation queries the response was YES. [2024-10-14 14:43:50,953 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65147 conditions, 8260 events. 4412/8260 cut-off events. For 225742/225742 co-relation queries the response was YES. Maximal size of possible extension queue 322. Compared 58084 event pairs, 298 based on Foata normal form. 1/8261 useless extension candidates. Maximal degree in co-relation 65053. Up to 2915 conditions per place. [2024-10-14 14:43:50,981 INFO L140 encePairwiseOnDemand]: 14/29 looper letters, 402 selfloop transitions, 505 changer transitions 44/953 dead transitions. [2024-10-14 14:43:50,981 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 346 places, 953 transitions, 18952 flow [2024-10-14 14:43:50,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2024-10-14 14:43:50,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2024-10-14 14:43:50,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 368 transitions. [2024-10-14 14:43:50,983 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.3339382940108893 [2024-10-14 14:43:50,983 INFO L175 Difference]: Start difference. First operand has 310 places, 757 transitions, 14932 flow. Second operand 38 states and 368 transitions. [2024-10-14 14:43:50,983 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 346 places, 953 transitions, 18952 flow [2024-10-14 14:43:51,913 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 335 places, 953 transitions, 18854 flow, removed 33 selfloop flow, removed 11 redundant places. [2024-10-14 14:43:51,927 INFO L231 Difference]: Finished difference. Result has 341 places, 786 transitions, 16391 flow [2024-10-14 14:43:51,927 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=14862, PETRI_DIFFERENCE_MINUEND_PLACES=298, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=757, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=473, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=282, PETRI_DIFFERENCE_SUBTRAHEND_STATES=38, PETRI_FLOW=16391, PETRI_PLACES=341, PETRI_TRANSITIONS=786} [2024-10-14 14:43:51,928 INFO L277 CegarLoopForPetriNet]: 29 programPoint places, 312 predicate places. [2024-10-14 14:43:51,928 INFO L471 AbstractCegarLoop]: Abstraction has has 341 places, 786 transitions, 16391 flow [2024-10-14 14:43:51,928 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 5.7631578947368425) internal successors, (219), 38 states have internal predecessors, (219), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 14:43:51,928 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-14 14:43:51,928 INFO L204 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-14 14:43:51,940 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2024-10-14 14:43:52,129 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2024-10-14 14:43:52,129 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-14 14:43:52,129 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 14:43:52,129 INFO L85 PathProgramCache]: Analyzing trace with hash 289980871, now seen corresponding path program 7 times [2024-10-14 14:43:52,130 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 14:43:52,130 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2093559891] [2024-10-14 14:43:52,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 14:43:52,130 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 14:43:52,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 14:43:52,996 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-14 14:43:52,996 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 14:43:52,997 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2093559891] [2024-10-14 14:43:52,997 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2093559891] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-14 14:43:52,997 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1178200140] [2024-10-14 14:43:52,997 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-10-14 14:43:52,997 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-14 14:43:52,998 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-14 14:43:52,999 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) [2024-10-14 14:43:53,001 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-10-14 14:43:53,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 14:43:53,088 INFO L255 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 29 conjuncts are in the unsatisfiable core [2024-10-14 14:43:53,090 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-14 14:43:53,376 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-14 14:43:53,377 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-14 14:43:53,520 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-14 14:43:53,520 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 18 [2024-10-14 14:43:53,599 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-10-14 14:43:53,599 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1178200140] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-14 14:43:53,599 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-14 14:43:53,599 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 12, 10] total 35 [2024-10-14 14:43:53,599 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1076839801] [2024-10-14 14:43:53,599 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-14 14:43:53,600 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2024-10-14 14:43:53,600 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 14:43:53,600 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2024-10-14 14:43:53,601 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=1135, Unknown=0, NotChecked=0, Total=1260 [2024-10-14 14:43:53,637 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 29 [2024-10-14 14:43:53,637 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 341 places, 786 transitions, 16391 flow. Second operand has 36 states, 36 states have (on average 5.861111111111111) internal successors, (211), 36 states have internal predecessors, (211), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 14:43:53,638 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-14 14:43:53,638 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 29 [2024-10-14 14:43:53,638 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-14 14:43:56,611 INFO L124 PetriNetUnfolderBase]: 4536/8492 cut-off events. [2024-10-14 14:43:56,611 INFO L125 PetriNetUnfolderBase]: For 245955/245955 co-relation queries the response was YES. [2024-10-14 14:43:56,657 INFO L83 FinitePrefix]: Finished finitePrefix Result has 69970 conditions, 8492 events. 4536/8492 cut-off events. For 245955/245955 co-relation queries the response was YES. Maximal size of possible extension queue 357. Compared 60612 event pairs, 425 based on Foata normal form. 1/8493 useless extension candidates. Maximal degree in co-relation 69874. Up to 4677 conditions per place. [2024-10-14 14:43:56,687 INFO L140 encePairwiseOnDemand]: 14/29 looper letters, 414 selfloop transitions, 460 changer transitions 40/916 dead transitions. [2024-10-14 14:43:56,687 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 360 places, 916 transitions, 19751 flow [2024-10-14 14:43:56,687 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2024-10-14 14:43:56,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2024-10-14 14:43:56,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 267 transitions. [2024-10-14 14:43:56,688 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.3288177339901478 [2024-10-14 14:43:56,688 INFO L175 Difference]: Start difference. First operand has 341 places, 786 transitions, 16391 flow. Second operand 28 states and 267 transitions. [2024-10-14 14:43:56,689 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 360 places, 916 transitions, 19751 flow [2024-10-14 14:43:57,916 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 342 places, 916 transitions, 19370 flow, removed 34 selfloop flow, removed 18 redundant places. [2024-10-14 14:43:57,932 INFO L231 Difference]: Finished difference. Result has 353 places, 804 transitions, 18091 flow [2024-10-14 14:43:57,932 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=16034, PETRI_DIFFERENCE_MINUEND_PLACES=315, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=786, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=442, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=337, PETRI_DIFFERENCE_SUBTRAHEND_STATES=28, PETRI_FLOW=18091, PETRI_PLACES=353, PETRI_TRANSITIONS=804} [2024-10-14 14:43:57,933 INFO L277 CegarLoopForPetriNet]: 29 programPoint places, 324 predicate places. [2024-10-14 14:43:57,933 INFO L471 AbstractCegarLoop]: Abstraction has has 353 places, 804 transitions, 18091 flow [2024-10-14 14:43:57,933 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 5.861111111111111) internal successors, (211), 36 states have internal predecessors, (211), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 14:43:57,933 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-14 14:43:57,933 INFO L204 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-14 14:43:57,951 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2024-10-14 14:43:58,137 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2024-10-14 14:43:58,138 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-14 14:43:58,138 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 14:43:58,138 INFO L85 PathProgramCache]: Analyzing trace with hash 1640305171, now seen corresponding path program 8 times [2024-10-14 14:43:58,138 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 14:43:58,138 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [115967298] [2024-10-14 14:43:58,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 14:43:58,138 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 14:43:58,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 14:43:58,946 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-14 14:43:58,946 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 14:43:58,946 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [115967298] [2024-10-14 14:43:58,946 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [115967298] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-14 14:43:58,946 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [777442869] [2024-10-14 14:43:58,946 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-14 14:43:58,947 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-14 14:43:58,947 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-14 14:43:58,948 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) [2024-10-14 14:43:58,949 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-10-14 14:43:59,014 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-14 14:43:59,014 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-14 14:43:59,015 INFO L255 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 29 conjuncts are in the unsatisfiable core [2024-10-14 14:43:59,016 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-14 14:43:59,272 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-14 14:43:59,272 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-14 14:43:59,401 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-14 14:43:59,401 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 18 [2024-10-14 14:43:59,474 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-10-14 14:43:59,474 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [777442869] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-14 14:43:59,474 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-14 14:43:59,474 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 12, 10] total 35 [2024-10-14 14:43:59,474 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [369130724] [2024-10-14 14:43:59,474 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-14 14:43:59,475 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2024-10-14 14:43:59,475 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 14:43:59,475 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2024-10-14 14:43:59,476 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=1136, Unknown=0, NotChecked=0, Total=1260 [2024-10-14 14:43:59,490 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 29 [2024-10-14 14:43:59,490 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 353 places, 804 transitions, 18091 flow. Second operand has 36 states, 36 states have (on average 5.861111111111111) internal successors, (211), 36 states have internal predecessors, (211), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 14:43:59,491 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-14 14:43:59,491 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 29 [2024-10-14 14:43:59,491 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-14 14:44:02,950 INFO L124 PetriNetUnfolderBase]: 4786/8958 cut-off events. [2024-10-14 14:44:02,950 INFO L125 PetriNetUnfolderBase]: For 313503/313503 co-relation queries the response was YES. [2024-10-14 14:44:03,005 INFO L83 FinitePrefix]: Finished finitePrefix Result has 78775 conditions, 8958 events. 4786/8958 cut-off events. For 313503/313503 co-relation queries the response was YES. Maximal size of possible extension queue 370. Compared 64670 event pairs, 419 based on Foata normal form. 1/8959 useless extension candidates. Maximal degree in co-relation 78671. Up to 3967 conditions per place. [2024-10-14 14:44:03,041 INFO L140 encePairwiseOnDemand]: 14/29 looper letters, 434 selfloop transitions, 573 changer transitions 33/1042 dead transitions. [2024-10-14 14:44:03,041 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 379 places, 1042 transitions, 24351 flow [2024-10-14 14:44:03,042 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2024-10-14 14:44:03,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2024-10-14 14:44:03,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 310 transitions. [2024-10-14 14:44:03,043 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.3144016227180527 [2024-10-14 14:44:03,043 INFO L175 Difference]: Start difference. First operand has 353 places, 804 transitions, 18091 flow. Second operand 34 states and 310 transitions. [2024-10-14 14:44:03,043 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 379 places, 1042 transitions, 24351 flow [2024-10-14 14:44:04,444 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 359 places, 1042 transitions, 24243 flow, removed 23 selfloop flow, removed 20 redundant places. [2024-10-14 14:44:04,466 INFO L231 Difference]: Finished difference. Result has 368 places, 901 transitions, 22207 flow [2024-10-14 14:44:04,467 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=17999, PETRI_DIFFERENCE_MINUEND_PLACES=326, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=804, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=483, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=312, PETRI_DIFFERENCE_SUBTRAHEND_STATES=34, PETRI_FLOW=22207, PETRI_PLACES=368, PETRI_TRANSITIONS=901} [2024-10-14 14:44:04,468 INFO L277 CegarLoopForPetriNet]: 29 programPoint places, 339 predicate places. [2024-10-14 14:44:04,468 INFO L471 AbstractCegarLoop]: Abstraction has has 368 places, 901 transitions, 22207 flow [2024-10-14 14:44:04,468 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 5.861111111111111) internal successors, (211), 36 states have internal predecessors, (211), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 14:44:04,468 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-14 14:44:04,469 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, 1, 1, 1, 1] [2024-10-14 14:44:04,484 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2024-10-14 14:44:04,669 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2024-10-14 14:44:04,669 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-14 14:44:04,670 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 14:44:04,670 INFO L85 PathProgramCache]: Analyzing trace with hash -860762721, now seen corresponding path program 9 times [2024-10-14 14:44:04,670 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 14:44:04,670 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2031169827] [2024-10-14 14:44:04,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 14:44:04,670 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 14:44:04,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 14:44:04,805 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-14 14:44:04,806 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 14:44:04,806 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2031169827] [2024-10-14 14:44:04,806 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2031169827] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-14 14:44:04,806 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [126775307] [2024-10-14 14:44:04,806 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-10-14 14:44:04,806 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-14 14:44:04,807 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-14 14:44:04,808 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) [2024-10-14 14:44:04,811 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2024-10-14 14:44:04,894 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2024-10-14 14:44:04,894 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-14 14:44:04,895 INFO L255 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 11 conjuncts are in the unsatisfiable core [2024-10-14 14:44:04,896 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-14 14:44:05,026 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 8 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-14 14:44:05,026 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-14 14:44:05,218 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-14 14:44:05,219 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [126775307] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-14 14:44:05,219 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-14 14:44:05,219 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 8] total 21 [2024-10-14 14:44:05,219 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [916963114] [2024-10-14 14:44:05,219 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-14 14:44:05,219 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2024-10-14 14:44:05,220 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 14:44:05,220 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2024-10-14 14:44:05,220 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=351, Unknown=0, NotChecked=0, Total=462 [2024-10-14 14:44:05,221 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 29 [2024-10-14 14:44:05,221 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 368 places, 901 transitions, 22207 flow. Second operand has 22 states, 22 states have (on average 10.590909090909092) internal successors, (233), 22 states have internal predecessors, (233), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 14:44:05,221 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-14 14:44:05,221 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 29 [2024-10-14 14:44:05,221 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-14 14:44:06,405 INFO L124 PetriNetUnfolderBase]: 1512/3335 cut-off events. [2024-10-14 14:44:06,405 INFO L125 PetriNetUnfolderBase]: For 137658/137740 co-relation queries the response was YES. [2024-10-14 14:44:06,434 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32743 conditions, 3335 events. 1512/3335 cut-off events. For 137658/137740 co-relation queries the response was YES. Maximal size of possible extension queue 193. Compared 24269 event pairs, 110 based on Foata normal form. 138/3444 useless extension candidates. Maximal degree in co-relation 32635. Up to 1698 conditions per place. [2024-10-14 14:44:06,454 INFO L140 encePairwiseOnDemand]: 23/29 looper letters, 239 selfloop transitions, 13 changer transitions 115/478 dead transitions. [2024-10-14 14:44:06,454 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 333 places, 478 transitions, 11660 flow [2024-10-14 14:44:06,455 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-10-14 14:44:06,455 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-10-14 14:44:06,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 161 transitions. [2024-10-14 14:44:06,456 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5047021943573667 [2024-10-14 14:44:06,456 INFO L175 Difference]: Start difference. First operand has 368 places, 901 transitions, 22207 flow. Second operand 11 states and 161 transitions. [2024-10-14 14:44:06,456 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 333 places, 478 transitions, 11660 flow [2024-10-14 14:44:07,025 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 269 places, 478 transitions, 10235 flow, removed 154 selfloop flow, removed 64 redundant places. [2024-10-14 14:44:07,032 INFO L231 Difference]: Finished difference. Result has 269 places, 335 transitions, 7151 flow [2024-10-14 14:44:07,032 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=9299, PETRI_DIFFERENCE_MINUEND_PLACES=259, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=441, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=428, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=7151, PETRI_PLACES=269, PETRI_TRANSITIONS=335} [2024-10-14 14:44:07,032 INFO L277 CegarLoopForPetriNet]: 29 programPoint places, 240 predicate places. [2024-10-14 14:44:07,032 INFO L471 AbstractCegarLoop]: Abstraction has has 269 places, 335 transitions, 7151 flow [2024-10-14 14:44:07,033 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 10.590909090909092) internal successors, (233), 22 states have internal predecessors, (233), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 14:44:07,033 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-14 14:44:07,033 INFO L204 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-14 14:44:07,045 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2024-10-14 14:44:07,233 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-14 14:44:07,233 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-14 14:44:07,234 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 14:44:07,234 INFO L85 PathProgramCache]: Analyzing trace with hash -484397437, now seen corresponding path program 10 times [2024-10-14 14:44:07,234 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 14:44:07,234 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1425495986] [2024-10-14 14:44:07,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 14:44:07,234 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 14:44:07,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 14:44:07,690 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 5 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-14 14:44:07,691 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 14:44:07,691 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1425495986] [2024-10-14 14:44:07,691 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1425495986] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-14 14:44:07,691 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [681890735] [2024-10-14 14:44:07,691 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-10-14 14:44:07,691 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-14 14:44:07,691 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-14 14:44:07,692 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) [2024-10-14 14:44:07,693 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2024-10-14 14:44:07,760 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-10-14 14:44:07,761 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-14 14:44:07,762 INFO L255 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 24 conjuncts are in the unsatisfiable core [2024-10-14 14:44:07,763 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-14 14:44:08,058 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2024-10-14 14:44:08,058 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 10 [2024-10-14 14:44:08,075 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 2 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-14 14:44:08,075 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-14 14:44:08,163 INFO L349 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2024-10-14 14:44:08,163 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 14 [2024-10-14 14:44:08,547 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-14 14:44:08,548 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [681890735] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-14 14:44:08,548 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-14 14:44:08,548 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 30 [2024-10-14 14:44:08,548 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [192614749] [2024-10-14 14:44:08,548 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-14 14:44:08,548 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2024-10-14 14:44:08,549 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 14:44:08,549 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2024-10-14 14:44:08,549 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=806, Unknown=0, NotChecked=0, Total=930 [2024-10-14 14:44:08,577 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 29 [2024-10-14 14:44:08,578 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 269 places, 335 transitions, 7151 flow. Second operand has 31 states, 31 states have (on average 8.290322580645162) internal successors, (257), 31 states have internal predecessors, (257), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 14:44:08,578 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-14 14:44:08,578 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 29 [2024-10-14 14:44:08,578 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-14 14:44:12,772 INFO L124 PetriNetUnfolderBase]: 4786/9123 cut-off events. [2024-10-14 14:44:12,772 INFO L125 PetriNetUnfolderBase]: For 302860/303259 co-relation queries the response was YES. [2024-10-14 14:44:12,817 INFO L83 FinitePrefix]: Finished finitePrefix Result has 80457 conditions, 9123 events. 4786/9123 cut-off events. For 302860/303259 co-relation queries the response was YES. Maximal size of possible extension queue 292. Compared 62938 event pairs, 455 based on Foata normal form. 391/9498 useless extension candidates. Maximal degree in co-relation 80386. Up to 2255 conditions per place. [2024-10-14 14:44:12,868 INFO L140 encePairwiseOnDemand]: 21/29 looper letters, 868 selfloop transitions, 481 changer transitions 0/1421 dead transitions. [2024-10-14 14:44:12,869 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 283 places, 1421 transitions, 31978 flow [2024-10-14 14:44:12,869 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2024-10-14 14:44:12,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2024-10-14 14:44:12,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 728 transitions. [2024-10-14 14:44:12,871 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5229885057471264 [2024-10-14 14:44:12,871 INFO L175 Difference]: Start difference. First operand has 269 places, 335 transitions, 7151 flow. Second operand 48 states and 728 transitions. [2024-10-14 14:44:12,871 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 283 places, 1421 transitions, 31978 flow [2024-10-14 14:44:13,746 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 252 places, 1421 transitions, 29742 flow, removed 615 selfloop flow, removed 31 redundant places. [2024-10-14 14:44:13,764 INFO L231 Difference]: Finished difference. Result has 291 places, 757 transitions, 19049 flow [2024-10-14 14:44:13,764 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=6760, PETRI_DIFFERENCE_MINUEND_PLACES=205, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=335, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=106, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=191, PETRI_DIFFERENCE_SUBTRAHEND_STATES=48, PETRI_FLOW=19049, PETRI_PLACES=291, PETRI_TRANSITIONS=757} [2024-10-14 14:44:13,765 INFO L277 CegarLoopForPetriNet]: 29 programPoint places, 262 predicate places. [2024-10-14 14:44:13,765 INFO L471 AbstractCegarLoop]: Abstraction has has 291 places, 757 transitions, 19049 flow [2024-10-14 14:44:13,765 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 8.290322580645162) internal successors, (257), 31 states have internal predecessors, (257), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 14:44:13,765 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-14 14:44:13,765 INFO L204 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-14 14:44:13,778 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2024-10-14 14:44:13,966 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-14 14:44:13,966 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-14 14:44:13,966 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 14:44:13,966 INFO L85 PathProgramCache]: Analyzing trace with hash -2096187447, now seen corresponding path program 11 times [2024-10-14 14:44:13,967 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 14:44:13,967 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1418480784] [2024-10-14 14:44:13,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 14:44:13,967 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 14:44:13,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 14:44:14,384 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 5 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-14 14:44:14,384 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 14:44:14,384 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1418480784] [2024-10-14 14:44:14,384 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1418480784] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-14 14:44:14,385 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1167109437] [2024-10-14 14:44:14,385 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-10-14 14:44:14,385 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-14 14:44:14,385 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-14 14:44:14,386 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) [2024-10-14 14:44:14,387 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2024-10-14 14:44:14,457 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2024-10-14 14:44:14,457 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-14 14:44:14,458 INFO L255 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 24 conjuncts are in the unsatisfiable core [2024-10-14 14:44:14,459 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-14 14:44:14,799 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2024-10-14 14:44:14,799 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 10 [2024-10-14 14:44:14,817 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 2 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-14 14:44:14,818 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-14 14:44:14,929 INFO L349 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2024-10-14 14:44:14,929 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 14 [2024-10-14 14:44:15,218 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-14 14:44:15,218 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1167109437] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-14 14:44:15,218 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-14 14:44:15,218 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 30 [2024-10-14 14:44:15,218 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [326607697] [2024-10-14 14:44:15,218 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-14 14:44:15,219 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2024-10-14 14:44:15,219 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 14:44:15,219 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2024-10-14 14:44:15,220 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=133, Invalid=797, Unknown=0, NotChecked=0, Total=930 [2024-10-14 14:44:15,247 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 29 [2024-10-14 14:44:15,248 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 291 places, 757 transitions, 19049 flow. Second operand has 31 states, 31 states have (on average 8.290322580645162) internal successors, (257), 31 states have internal predecessors, (257), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 14:44:15,248 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-14 14:44:15,248 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 29 [2024-10-14 14:44:15,248 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand