./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-channel-sum.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 4a390ef5 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-channel-sum.wvr.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 5b29ee6f81c7ed2984792cb48e45a380cefe6f3d0c807482de3b6756d33333e4 --- Real Ultimate output --- This is Ultimate 0.2.5-dev-4a390ef-m [2024-10-24 12:32:02,298 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-10-24 12:32:02,365 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-10-24 12:32:02,373 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-10-24 12:32:02,374 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-10-24 12:32:02,403 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-10-24 12:32:02,407 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-10-24 12:32:02,408 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-10-24 12:32:02,409 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-10-24 12:32:02,410 INFO L153 SettingsManager]: * Use memory slicer=true [2024-10-24 12:32:02,410 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-10-24 12:32:02,410 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-10-24 12:32:02,411 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-10-24 12:32:02,413 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-10-24 12:32:02,413 INFO L153 SettingsManager]: * Use SBE=true [2024-10-24 12:32:02,414 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-10-24 12:32:02,414 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-10-24 12:32:02,414 INFO L153 SettingsManager]: * sizeof long=4 [2024-10-24 12:32:02,417 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-10-24 12:32:02,418 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-10-24 12:32:02,418 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-10-24 12:32:02,419 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-10-24 12:32:02,423 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-10-24 12:32:02,423 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-10-24 12:32:02,424 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-10-24 12:32:02,424 INFO L153 SettingsManager]: * sizeof long double=12 [2024-10-24 12:32:02,424 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-10-24 12:32:02,424 INFO L153 SettingsManager]: * Use constant arrays=true [2024-10-24 12:32:02,424 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-10-24 12:32:02,425 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-10-24 12:32:02,425 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-10-24 12:32:02,425 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-10-24 12:32:02,425 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-24 12:32:02,426 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-10-24 12:32:02,426 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-10-24 12:32:02,426 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-10-24 12:32:02,427 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-10-24 12:32:02,427 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-10-24 12:32:02,427 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-10-24 12:32:02,429 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-10-24 12:32:02,429 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-10-24 12:32:02,430 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-10-24 12:32:02,430 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 5b29ee6f81c7ed2984792cb48e45a380cefe6f3d0c807482de3b6756d33333e4 [2024-10-24 12:32:02,741 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-10-24 12:32:02,763 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-10-24 12:32:02,766 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-10-24 12:32:02,768 INFO L270 PluginConnector]: Initializing CDTParser... [2024-10-24 12:32:02,768 INFO L274 PluginConnector]: CDTParser initialized [2024-10-24 12:32:02,769 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/popl20-channel-sum.wvr.c [2024-10-24 12:32:04,258 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-10-24 12:32:04,477 INFO L384 CDTParser]: Found 1 translation units. [2024-10-24 12:32:04,478 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/popl20-channel-sum.wvr.c [2024-10-24 12:32:04,487 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/06a7552ec/c57fc75328be476687e49d3393b90af5/FLAG779283a16 [2024-10-24 12:32:04,503 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/06a7552ec/c57fc75328be476687e49d3393b90af5 [2024-10-24 12:32:04,506 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-10-24 12:32:04,507 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-10-24 12:32:04,508 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-10-24 12:32:04,508 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-10-24 12:32:04,514 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-10-24 12:32:04,515 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.10 12:32:04" (1/1) ... [2024-10-24 12:32:04,518 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6c185678 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 12:32:04, skipping insertion in model container [2024-10-24 12:32:04,519 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.10 12:32:04" (1/1) ... [2024-10-24 12:32:04,548 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-10-24 12:32:04,774 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-channel-sum.wvr.c[2973,2986] [2024-10-24 12:32:04,786 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-24 12:32:04,804 INFO L200 MainTranslator]: Completed pre-run [2024-10-24 12:32:04,837 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-channel-sum.wvr.c[2973,2986] [2024-10-24 12:32:04,843 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-24 12:32:04,871 INFO L204 MainTranslator]: Completed translation [2024-10-24 12:32:04,872 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 12:32:04 WrapperNode [2024-10-24 12:32:04,872 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-10-24 12:32:04,873 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-10-24 12:32:04,874 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-10-24 12:32:04,874 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-10-24 12:32:04,881 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 12:32:04" (1/1) ... [2024-10-24 12:32:04,894 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 12:32:04" (1/1) ... [2024-10-24 12:32:04,927 INFO L138 Inliner]: procedures = 23, calls = 35, calls flagged for inlining = 10, calls inlined = 10, statements flattened = 146 [2024-10-24 12:32:04,931 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-10-24 12:32:04,932 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-10-24 12:32:04,932 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-10-24 12:32:04,932 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-10-24 12:32:04,943 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 12:32:04" (1/1) ... [2024-10-24 12:32:04,943 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 12:32:04" (1/1) ... [2024-10-24 12:32:04,946 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 12:32:04" (1/1) ... [2024-10-24 12:32:04,973 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]. [2024-10-24 12:32:04,974 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 12:32:04" (1/1) ... [2024-10-24 12:32:04,974 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 12:32:04" (1/1) ... [2024-10-24 12:32:04,980 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 12:32:04" (1/1) ... [2024-10-24 12:32:04,989 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 12:32:04" (1/1) ... [2024-10-24 12:32:04,994 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 12:32:04" (1/1) ... [2024-10-24 12:32:04,995 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 12:32:04" (1/1) ... [2024-10-24 12:32:04,998 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-10-24 12:32:04,999 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-10-24 12:32:04,999 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-10-24 12:32:04,999 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-10-24 12:32:05,000 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 12:32:04" (1/1) ... [2024-10-24 12:32:05,006 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-24 12:32:05,016 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-24 12:32:05,030 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) [2024-10-24 12:32:05,033 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 [2024-10-24 12:32:05,075 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-10-24 12:32:05,076 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2024-10-24 12:32:05,076 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2024-10-24 12:32:05,076 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2024-10-24 12:32:05,076 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2024-10-24 12:32:05,076 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-10-24 12:32:05,076 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-10-24 12:32:05,077 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-10-24 12:32:05,077 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-10-24 12:32:05,077 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-10-24 12:32:05,077 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-10-24 12:32:05,077 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-10-24 12:32:05,077 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-10-24 12:32:05,077 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-10-24 12:32:05,077 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-10-24 12:32:05,078 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-10-24 12:32:05,079 WARN L207 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2024-10-24 12:32:05,219 INFO L238 CfgBuilder]: Building ICFG [2024-10-24 12:32:05,221 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-10-24 12:32:05,459 INFO L283 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2024-10-24 12:32:05,460 INFO L287 CfgBuilder]: Performing block encoding [2024-10-24 12:32:05,681 INFO L309 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-10-24 12:32:05,681 INFO L314 CfgBuilder]: Removed 3 assume(true) statements. [2024-10-24 12:32:05,682 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.10 12:32:05 BoogieIcfgContainer [2024-10-24 12:32:05,682 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-10-24 12:32:05,685 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-10-24 12:32:05,686 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-10-24 12:32:05,690 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-10-24 12:32:05,690 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.10 12:32:04" (1/3) ... [2024-10-24 12:32:05,691 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@50708ce8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.10 12:32:05, skipping insertion in model container [2024-10-24 12:32:05,692 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 12:32:04" (2/3) ... [2024-10-24 12:32:05,692 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@50708ce8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.10 12:32:05, skipping insertion in model container [2024-10-24 12:32:05,693 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.10 12:32:05" (3/3) ... [2024-10-24 12:32:05,694 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-channel-sum.wvr.c [2024-10-24 12:32:05,714 INFO L209 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-10-24 12:32:05,714 INFO L149 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-10-24 12:32:05,715 INFO L484 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-10-24 12:32:05,780 INFO L143 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2024-10-24 12:32:05,824 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 35 places, 33 transitions, 80 flow [2024-10-24 12:32:05,854 INFO L124 PetriNetUnfolderBase]: 5/31 cut-off events. [2024-10-24 12:32:05,854 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-10-24 12:32:05,858 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40 conditions, 31 events. 5/31 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. 0/25 useless extension candidates. Maximal degree in co-relation 24. Up to 2 conditions per place. [2024-10-24 12:32:05,858 INFO L82 GeneralOperation]: Start removeDead. Operand has 35 places, 33 transitions, 80 flow [2024-10-24 12:32:05,862 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 32 places, 30 transitions, 72 flow [2024-10-24 12:32:05,876 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-10-24 12:32:05,885 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;@3aef8a3, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-10-24 12:32:05,885 INFO L334 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2024-10-24 12:32:05,898 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-10-24 12:32:05,898 INFO L124 PetriNetUnfolderBase]: 5/29 cut-off events. [2024-10-24 12:32:05,898 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-10-24 12:32:05,898 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-24 12:32:05,899 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-24 12:32:05,900 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-24 12:32:05,905 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 12:32:05,906 INFO L85 PathProgramCache]: Analyzing trace with hash -416983099, now seen corresponding path program 1 times [2024-10-24 12:32:05,917 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 12:32:05,917 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1540405243] [2024-10-24 12:32:05,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 12:32:05,918 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 12:32:06,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 12:32:06,150 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 12:32:06,150 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 12:32:06,151 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1540405243] [2024-10-24 12:32:06,155 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1540405243] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-24 12:32:06,155 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-24 12:32:06,156 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-10-24 12:32:06,162 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1997737885] [2024-10-24 12:32:06,163 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-24 12:32:06,178 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2024-10-24 12:32:06,194 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-24 12:32:06,216 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2024-10-24 12:32:06,217 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-10-24 12:32:06,218 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 33 [2024-10-24 12:32:06,220 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 32 places, 30 transitions, 72 flow. Second operand has 2 states, 2 states have (on average 15.5) internal successors, (31), 2 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 12:32:06,220 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-24 12:32:06,220 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 33 [2024-10-24 12:32:06,221 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-24 12:32:06,330 INFO L124 PetriNetUnfolderBase]: 94/189 cut-off events. [2024-10-24 12:32:06,331 INFO L125 PetriNetUnfolderBase]: For 29/29 co-relation queries the response was YES. [2024-10-24 12:32:06,335 INFO L83 FinitePrefix]: Finished finitePrefix Result has 378 conditions, 189 events. 94/189 cut-off events. For 29/29 co-relation queries the response was YES. Maximal size of possible extension queue 23. Compared 811 event pairs, 78 based on Foata normal form. 0/150 useless extension candidates. Maximal degree in co-relation 307. Up to 167 conditions per place. [2024-10-24 12:32:06,341 INFO L140 encePairwiseOnDemand]: 32/33 looper letters, 22 selfloop transitions, 0 changer transitions 0/29 dead transitions. [2024-10-24 12:32:06,341 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 33 places, 29 transitions, 114 flow [2024-10-24 12:32:06,343 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2024-10-24 12:32:06,346 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2024-10-24 12:32:06,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 41 transitions. [2024-10-24 12:32:06,355 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6212121212121212 [2024-10-24 12:32:06,357 INFO L175 Difference]: Start difference. First operand has 32 places, 30 transitions, 72 flow. Second operand 2 states and 41 transitions. [2024-10-24 12:32:06,358 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 33 places, 29 transitions, 114 flow [2024-10-24 12:32:06,361 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 29 places, 29 transitions, 106 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-10-24 12:32:06,364 INFO L231 Difference]: Finished difference. Result has 29 places, 29 transitions, 62 flow [2024-10-24 12:32:06,366 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=62, PETRI_DIFFERENCE_MINUEND_PLACES=28, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=29, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=62, PETRI_PLACES=29, PETRI_TRANSITIONS=29} [2024-10-24 12:32:06,370 INFO L277 CegarLoopForPetriNet]: 32 programPoint places, -3 predicate places. [2024-10-24 12:32:06,373 INFO L471 AbstractCegarLoop]: Abstraction has has 29 places, 29 transitions, 62 flow [2024-10-24 12:32:06,373 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 15.5) internal successors, (31), 2 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 12:32:06,373 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-24 12:32:06,374 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-24 12:32:06,374 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-10-24 12:32:06,374 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-24 12:32:06,376 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 12:32:06,376 INFO L85 PathProgramCache]: Analyzing trace with hash 513515575, now seen corresponding path program 1 times [2024-10-24 12:32:06,376 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 12:32:06,377 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2022429130] [2024-10-24 12:32:06,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 12:32:06,377 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 12:32:06,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 12:32:06,589 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 12:32:06,590 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 12:32:06,591 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2022429130] [2024-10-24 12:32:06,591 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2022429130] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-24 12:32:06,591 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-24 12:32:06,591 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-10-24 12:32:06,591 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [598646510] [2024-10-24 12:32:06,592 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-24 12:32:06,593 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-24 12:32:06,594 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-24 12:32:06,595 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-24 12:32:06,595 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-24 12:32:06,596 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 33 [2024-10-24 12:32:06,597 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 29 places, 29 transitions, 62 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) [2024-10-24 12:32:06,597 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-24 12:32:06,597 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 33 [2024-10-24 12:32:06,597 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-24 12:32:06,730 INFO L124 PetriNetUnfolderBase]: 155/301 cut-off events. [2024-10-24 12:32:06,731 INFO L125 PetriNetUnfolderBase]: For 9/9 co-relation queries the response was YES. [2024-10-24 12:32:06,732 INFO L83 FinitePrefix]: Finished finitePrefix Result has 572 conditions, 301 events. 155/301 cut-off events. For 9/9 co-relation queries the response was YES. Maximal size of possible extension queue 29. Compared 1282 event pairs, 48 based on Foata normal form. 1/240 useless extension candidates. Maximal degree in co-relation 569. Up to 153 conditions per place. [2024-10-24 12:32:06,735 INFO L140 encePairwiseOnDemand]: 30/33 looper letters, 35 selfloop transitions, 2 changer transitions 2/46 dead transitions. [2024-10-24 12:32:06,735 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 31 places, 46 transitions, 177 flow [2024-10-24 12:32:06,740 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-24 12:32:06,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-10-24 12:32:06,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 67 transitions. [2024-10-24 12:32:06,742 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6767676767676768 [2024-10-24 12:32:06,742 INFO L175 Difference]: Start difference. First operand has 29 places, 29 transitions, 62 flow. Second operand 3 states and 67 transitions. [2024-10-24 12:32:06,742 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 31 places, 46 transitions, 177 flow [2024-10-24 12:32:06,743 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 31 places, 46 transitions, 177 flow, removed 0 selfloop flow, removed 0 redundant places. [2024-10-24 12:32:06,754 INFO L231 Difference]: Finished difference. Result has 32 places, 30 transitions, 74 flow [2024-10-24 12:32:06,755 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=62, PETRI_DIFFERENCE_MINUEND_PLACES=29, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=29, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=74, PETRI_PLACES=32, PETRI_TRANSITIONS=30} [2024-10-24 12:32:06,756 INFO L277 CegarLoopForPetriNet]: 32 programPoint places, 0 predicate places. [2024-10-24 12:32:06,756 INFO L471 AbstractCegarLoop]: Abstraction has has 32 places, 30 transitions, 74 flow [2024-10-24 12:32:06,756 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) [2024-10-24 12:32:06,756 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-24 12:32:06,757 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-24 12:32:06,757 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-10-24 12:32:06,757 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-24 12:32:06,759 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 12:32:06,759 INFO L85 PathProgramCache]: Analyzing trace with hash 1720866669, now seen corresponding path program 1 times [2024-10-24 12:32:06,760 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 12:32:06,761 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1733949295] [2024-10-24 12:32:06,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 12:32:06,761 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 12:32:06,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 12:32:07,000 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 12:32:07,000 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 12:32:07,001 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1733949295] [2024-10-24 12:32:07,001 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1733949295] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-24 12:32:07,001 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-24 12:32:07,001 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-10-24 12:32:07,002 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [646514460] [2024-10-24 12:32:07,002 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-24 12:32:07,002 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-10-24 12:32:07,003 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-24 12:32:07,003 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-10-24 12:32:07,003 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-10-24 12:32:07,004 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 33 [2024-10-24 12:32:07,004 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 32 places, 30 transitions, 74 flow. Second operand has 4 states, 4 states have (on average 12.75) internal successors, (51), 4 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 12:32:07,004 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-24 12:32:07,004 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 33 [2024-10-24 12:32:07,004 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-24 12:32:07,155 INFO L124 PetriNetUnfolderBase]: 188/360 cut-off events. [2024-10-24 12:32:07,157 INFO L125 PetriNetUnfolderBase]: For 81/81 co-relation queries the response was YES. [2024-10-24 12:32:07,158 INFO L83 FinitePrefix]: Finished finitePrefix Result has 769 conditions, 360 events. 188/360 cut-off events. For 81/81 co-relation queries the response was YES. Maximal size of possible extension queue 36. Compared 1708 event pairs, 145 based on Foata normal form. 18/344 useless extension candidates. Maximal degree in co-relation 764. Up to 264 conditions per place. [2024-10-24 12:32:07,160 INFO L140 encePairwiseOnDemand]: 28/33 looper letters, 22 selfloop transitions, 2 changer transitions 13/44 dead transitions. [2024-10-24 12:32:07,161 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 35 places, 44 transitions, 180 flow [2024-10-24 12:32:07,161 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-10-24 12:32:07,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-10-24 12:32:07,162 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 74 transitions. [2024-10-24 12:32:07,162 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5606060606060606 [2024-10-24 12:32:07,162 INFO L175 Difference]: Start difference. First operand has 32 places, 30 transitions, 74 flow. Second operand 4 states and 74 transitions. [2024-10-24 12:32:07,163 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 35 places, 44 transitions, 180 flow [2024-10-24 12:32:07,164 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 34 places, 44 transitions, 178 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-10-24 12:32:07,165 INFO L231 Difference]: Finished difference. Result has 36 places, 31 transitions, 88 flow [2024-10-24 12:32:07,165 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=72, PETRI_DIFFERENCE_MINUEND_PLACES=31, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=30, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=88, PETRI_PLACES=36, PETRI_TRANSITIONS=31} [2024-10-24 12:32:07,166 INFO L277 CegarLoopForPetriNet]: 32 programPoint places, 4 predicate places. [2024-10-24 12:32:07,166 INFO L471 AbstractCegarLoop]: Abstraction has has 36 places, 31 transitions, 88 flow [2024-10-24 12:32:07,166 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 12.75) internal successors, (51), 4 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 12:32:07,166 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-24 12:32:07,166 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] [2024-10-24 12:32:07,167 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-10-24 12:32:07,167 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-24 12:32:07,168 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 12:32:07,168 INFO L85 PathProgramCache]: Analyzing trace with hash -1277236608, now seen corresponding path program 1 times [2024-10-24 12:32:07,168 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 12:32:07,168 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1121818737] [2024-10-24 12:32:07,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 12:32:07,169 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 12:32:07,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 12:32:07,415 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-24 12:32:07,415 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 12:32:07,415 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1121818737] [2024-10-24 12:32:07,415 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1121818737] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-24 12:32:07,416 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-24 12:32:07,416 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-10-24 12:32:07,416 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [484775913] [2024-10-24 12:32:07,416 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-24 12:32:07,416 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-10-24 12:32:07,417 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-24 12:32:07,417 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-10-24 12:32:07,417 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-10-24 12:32:07,429 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 33 [2024-10-24 12:32:07,430 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 36 places, 31 transitions, 88 flow. Second operand has 4 states, 4 states have (on average 11.5) internal successors, (46), 4 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 12:32:07,430 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-24 12:32:07,430 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 33 [2024-10-24 12:32:07,430 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-24 12:32:07,653 INFO L124 PetriNetUnfolderBase]: 259/486 cut-off events. [2024-10-24 12:32:07,653 INFO L125 PetriNetUnfolderBase]: For 94/94 co-relation queries the response was YES. [2024-10-24 12:32:07,656 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1020 conditions, 486 events. 259/486 cut-off events. For 94/94 co-relation queries the response was YES. Maximal size of possible extension queue 26. Compared 1872 event pairs, 57 based on Foata normal form. 20/469 useless extension candidates. Maximal degree in co-relation 1013. Up to 304 conditions per place. [2024-10-24 12:32:07,658 INFO L140 encePairwiseOnDemand]: 28/33 looper letters, 40 selfloop transitions, 6 changer transitions 7/58 dead transitions. [2024-10-24 12:32:07,658 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 38 places, 58 transitions, 255 flow [2024-10-24 12:32:07,660 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-10-24 12:32:07,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-10-24 12:32:07,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 80 transitions. [2024-10-24 12:32:07,663 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6060606060606061 [2024-10-24 12:32:07,663 INFO L175 Difference]: Start difference. First operand has 36 places, 31 transitions, 88 flow. Second operand 4 states and 80 transitions. [2024-10-24 12:32:07,663 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 38 places, 58 transitions, 255 flow [2024-10-24 12:32:07,664 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 37 places, 58 transitions, 251 flow, removed 1 selfloop flow, removed 1 redundant places. [2024-10-24 12:32:07,668 INFO L231 Difference]: Finished difference. Result has 39 places, 36 transitions, 121 flow [2024-10-24 12:32:07,669 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=84, PETRI_DIFFERENCE_MINUEND_PLACES=34, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=31, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=121, PETRI_PLACES=39, PETRI_TRANSITIONS=36} [2024-10-24 12:32:07,670 INFO L277 CegarLoopForPetriNet]: 32 programPoint places, 7 predicate places. [2024-10-24 12:32:07,670 INFO L471 AbstractCegarLoop]: Abstraction has has 39 places, 36 transitions, 121 flow [2024-10-24 12:32:07,670 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 11.5) internal successors, (46), 4 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 12:32:07,670 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-24 12:32:07,671 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-24 12:32:07,671 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-10-24 12:32:07,671 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-24 12:32:07,673 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 12:32:07,673 INFO L85 PathProgramCache]: Analyzing trace with hash 2062690990, now seen corresponding path program 1 times [2024-10-24 12:32:07,674 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 12:32:07,674 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [461943748] [2024-10-24 12:32:07,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 12:32:07,676 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 12:32:07,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 12:32:07,919 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-24 12:32:07,919 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 12:32:07,920 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [461943748] [2024-10-24 12:32:07,920 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [461943748] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-24 12:32:07,920 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1271628629] [2024-10-24 12:32:07,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 12:32:07,921 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-24 12:32:07,921 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-24 12:32:07,923 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) [2024-10-24 12:32:07,925 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-10-24 12:32:08,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 12:32:08,013 INFO L255 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 26 conjuncts are in the unsatisfiable core [2024-10-24 12:32:08,019 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-24 12:32:08,115 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 1 [2024-10-24 12:32:08,509 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 12:32:08,511 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-24 12:32:09,190 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 61 treesize of output 55 [2024-10-24 12:32:09,210 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-24 12:32:09,210 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 78 treesize of output 68 [2024-10-24 12:32:09,349 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 12:32:09,349 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1271628629] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-24 12:32:09,350 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-24 12:32:09,350 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 7, 7] total 16 [2024-10-24 12:32:09,350 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1569674206] [2024-10-24 12:32:09,350 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-24 12:32:09,351 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-10-24 12:32:09,352 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-24 12:32:09,353 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-10-24 12:32:09,353 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2024-10-24 12:32:09,361 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 33 [2024-10-24 12:32:09,362 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 39 places, 36 transitions, 121 flow. Second operand has 17 states, 17 states have (on average 11.058823529411764) internal successors, (188), 17 states have internal predecessors, (188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 12:32:09,362 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-24 12:32:09,362 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 33 [2024-10-24 12:32:09,362 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-24 12:32:11,612 INFO L124 PetriNetUnfolderBase]: 1446/2735 cut-off events. [2024-10-24 12:32:11,612 INFO L125 PetriNetUnfolderBase]: For 1116/1116 co-relation queries the response was YES. [2024-10-24 12:32:11,619 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6196 conditions, 2735 events. 1446/2735 cut-off events. For 1116/1116 co-relation queries the response was YES. Maximal size of possible extension queue 140. Compared 16369 event pairs, 161 based on Foata normal form. 76/2595 useless extension candidates. Maximal degree in co-relation 6187. Up to 429 conditions per place. [2024-10-24 12:32:11,629 INFO L140 encePairwiseOnDemand]: 22/33 looper letters, 161 selfloop transitions, 51 changer transitions 173/390 dead transitions. [2024-10-24 12:32:11,629 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 390 transitions, 1876 flow [2024-10-24 12:32:11,630 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2024-10-24 12:32:11,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2024-10-24 12:32:11,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 676 transitions. [2024-10-24 12:32:11,637 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5121212121212121 [2024-10-24 12:32:11,637 INFO L175 Difference]: Start difference. First operand has 39 places, 36 transitions, 121 flow. Second operand 40 states and 676 transitions. [2024-10-24 12:32:11,638 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 390 transitions, 1876 flow [2024-10-24 12:32:11,646 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 78 places, 390 transitions, 1876 flow, removed 0 selfloop flow, removed 0 redundant places. [2024-10-24 12:32:11,651 INFO L231 Difference]: Finished difference. Result has 105 places, 83 transitions, 579 flow [2024-10-24 12:32:11,651 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=121, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=36, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=40, PETRI_FLOW=579, PETRI_PLACES=105, PETRI_TRANSITIONS=83} [2024-10-24 12:32:11,652 INFO L277 CegarLoopForPetriNet]: 32 programPoint places, 73 predicate places. [2024-10-24 12:32:11,652 INFO L471 AbstractCegarLoop]: Abstraction has has 105 places, 83 transitions, 579 flow [2024-10-24 12:32:11,652 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 11.058823529411764) internal successors, (188), 17 states have internal predecessors, (188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 12:32:11,653 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-24 12:32:11,653 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-24 12:32:11,673 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-10-24 12:32:11,854 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 [2024-10-24 12:32:11,854 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-24 12:32:11,855 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 12:32:11,855 INFO L85 PathProgramCache]: Analyzing trace with hash 611344543, now seen corresponding path program 1 times [2024-10-24 12:32:11,855 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 12:32:11,855 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [424468052] [2024-10-24 12:32:11,855 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 12:32:11,856 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 12:32:11,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 12:32:11,952 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-10-24 12:32:11,952 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 12:32:11,952 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [424468052] [2024-10-24 12:32:11,952 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [424468052] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-24 12:32:11,952 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-24 12:32:11,953 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-10-24 12:32:11,953 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [904055848] [2024-10-24 12:32:11,953 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-24 12:32:11,953 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-24 12:32:11,953 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-24 12:32:11,954 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-24 12:32:11,954 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-24 12:32:11,958 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 33 [2024-10-24 12:32:11,959 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 105 places, 83 transitions, 579 flow. Second operand has 3 states, 3 states have (on average 14.666666666666666) internal successors, (44), 3 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 12:32:11,959 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-24 12:32:11,959 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 33 [2024-10-24 12:32:11,959 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-24 12:32:12,175 INFO L124 PetriNetUnfolderBase]: 694/1304 cut-off events. [2024-10-24 12:32:12,175 INFO L125 PetriNetUnfolderBase]: For 4883/4883 co-relation queries the response was YES. [2024-10-24 12:32:12,184 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4366 conditions, 1304 events. 694/1304 cut-off events. For 4883/4883 co-relation queries the response was YES. Maximal size of possible extension queue 97. Compared 7434 event pairs, 164 based on Foata normal form. 8/1264 useless extension candidates. Maximal degree in co-relation 4330. Up to 1090 conditions per place. [2024-10-24 12:32:12,190 INFO L140 encePairwiseOnDemand]: 30/33 looper letters, 77 selfloop transitions, 2 changer transitions 2/86 dead transitions. [2024-10-24 12:32:12,191 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 88 places, 86 transitions, 743 flow [2024-10-24 12:32:12,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-24 12:32:12,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-10-24 12:32:12,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 58 transitions. [2024-10-24 12:32:12,192 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5858585858585859 [2024-10-24 12:32:12,192 INFO L175 Difference]: Start difference. First operand has 105 places, 83 transitions, 579 flow. Second operand 3 states and 58 transitions. [2024-10-24 12:32:12,192 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 88 places, 86 transitions, 743 flow [2024-10-24 12:32:12,216 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 86 transitions, 609 flow, removed 63 selfloop flow, removed 17 redundant places. [2024-10-24 12:32:12,219 INFO L231 Difference]: Finished difference. Result has 72 places, 70 transitions, 373 flow [2024-10-24 12:32:12,219 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=361, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=69, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=373, PETRI_PLACES=72, PETRI_TRANSITIONS=70} [2024-10-24 12:32:12,221 INFO L277 CegarLoopForPetriNet]: 32 programPoint places, 40 predicate places. [2024-10-24 12:32:12,222 INFO L471 AbstractCegarLoop]: Abstraction has has 72 places, 70 transitions, 373 flow [2024-10-24 12:32:12,222 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 14.666666666666666) internal successors, (44), 3 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 12:32:12,222 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-24 12:32:12,222 INFO L204 CegarLoopForPetriNet]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-24 12:32:12,223 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-10-24 12:32:12,223 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-24 12:32:12,225 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 12:32:12,225 INFO L85 PathProgramCache]: Analyzing trace with hash -456993145, now seen corresponding path program 2 times [2024-10-24 12:32:12,226 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 12:32:12,226 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1229225302] [2024-10-24 12:32:12,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 12:32:12,226 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 12:32:12,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 12:32:13,582 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 12:32:13,583 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 12:32:13,583 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1229225302] [2024-10-24 12:32:13,583 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1229225302] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-24 12:32:13,583 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1834348194] [2024-10-24 12:32:13,584 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-24 12:32:13,584 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-24 12:32:13,584 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-24 12:32:13,586 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) [2024-10-24 12:32:13,588 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-10-24 12:32:13,679 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-24 12:32:13,679 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-24 12:32:13,681 INFO L255 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 18 conjuncts are in the unsatisfiable core [2024-10-24 12:32:13,683 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-24 12:32:13,859 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-10-24 12:32:13,860 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-24 12:32:13,959 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-24 12:32:13,960 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 40 treesize of output 24 [2024-10-24 12:32:14,077 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-10-24 12:32:14,078 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1834348194] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-24 12:32:14,078 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-24 12:32:14,078 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 6, 4] total 17 [2024-10-24 12:32:14,079 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [99051205] [2024-10-24 12:32:14,079 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-24 12:32:14,080 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-10-24 12:32:14,081 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-24 12:32:14,082 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-10-24 12:32:14,082 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=238, Unknown=0, NotChecked=0, Total=306 [2024-10-24 12:32:14,251 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 33 [2024-10-24 12:32:14,252 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 70 transitions, 373 flow. Second operand has 18 states, 18 states have (on average 12.38888888888889) internal successors, (223), 18 states have internal predecessors, (223), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 12:32:14,252 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-24 12:32:14,252 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 33 [2024-10-24 12:32:14,252 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-24 12:32:14,956 INFO L124 PetriNetUnfolderBase]: 777/1601 cut-off events. [2024-10-24 12:32:14,956 INFO L125 PetriNetUnfolderBase]: For 2305/2305 co-relation queries the response was YES. [2024-10-24 12:32:14,960 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4478 conditions, 1601 events. 777/1601 cut-off events. For 2305/2305 co-relation queries the response was YES. Maximal size of possible extension queue 109. Compared 9697 event pairs, 174 based on Foata normal form. 1/1537 useless extension candidates. Maximal degree in co-relation 4455. Up to 449 conditions per place. [2024-10-24 12:32:14,965 INFO L140 encePairwiseOnDemand]: 26/33 looper letters, 94 selfloop transitions, 33 changer transitions 9/144 dead transitions. [2024-10-24 12:32:14,966 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 85 places, 144 transitions, 976 flow [2024-10-24 12:32:14,966 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-10-24 12:32:14,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2024-10-24 12:32:14,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 222 transitions. [2024-10-24 12:32:14,967 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4805194805194805 [2024-10-24 12:32:14,967 INFO L175 Difference]: Start difference. First operand has 72 places, 70 transitions, 373 flow. Second operand 14 states and 222 transitions. [2024-10-24 12:32:14,967 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 85 places, 144 transitions, 976 flow [2024-10-24 12:32:14,977 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 84 places, 144 transitions, 973 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-10-24 12:32:14,979 INFO L231 Difference]: Finished difference. Result has 88 places, 82 transitions, 569 flow [2024-10-24 12:32:14,979 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=371, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=70, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=569, PETRI_PLACES=88, PETRI_TRANSITIONS=82} [2024-10-24 12:32:14,980 INFO L277 CegarLoopForPetriNet]: 32 programPoint places, 56 predicate places. [2024-10-24 12:32:14,980 INFO L471 AbstractCegarLoop]: Abstraction has has 88 places, 82 transitions, 569 flow [2024-10-24 12:32:14,981 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 12.38888888888889) internal successors, (223), 18 states have internal predecessors, (223), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 12:32:14,981 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-24 12:32:14,981 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-24 12:32:15,000 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2024-10-24 12:32:15,181 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2024-10-24 12:32:15,182 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-24 12:32:15,183 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 12:32:15,183 INFO L85 PathProgramCache]: Analyzing trace with hash -318374799, now seen corresponding path program 3 times [2024-10-24 12:32:15,183 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 12:32:15,183 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [248755395] [2024-10-24 12:32:15,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 12:32:15,183 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 12:32:15,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 12:32:15,349 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-10-24 12:32:15,350 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 12:32:15,350 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [248755395] [2024-10-24 12:32:15,351 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [248755395] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-24 12:32:15,351 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1054117420] [2024-10-24 12:32:15,352 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-10-24 12:32:15,352 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-24 12:32:15,352 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-24 12:32:15,356 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) [2024-10-24 12:32:15,363 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-10-24 12:32:15,450 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-10-24 12:32:15,451 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-24 12:32:15,452 INFO L255 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-10-24 12:32:15,454 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-24 12:32:15,498 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-10-24 12:32:15,498 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-24 12:32:15,560 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-10-24 12:32:15,560 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1054117420] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-24 12:32:15,560 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-24 12:32:15,561 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 7 [2024-10-24 12:32:15,561 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [873156957] [2024-10-24 12:32:15,561 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-24 12:32:15,561 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-10-24 12:32:15,562 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-24 12:32:15,562 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-10-24 12:32:15,562 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2024-10-24 12:32:15,574 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 33 [2024-10-24 12:32:15,575 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 88 places, 82 transitions, 569 flow. Second operand has 8 states, 8 states have (on average 12.25) internal successors, (98), 8 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 12:32:15,576 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-24 12:32:15,576 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 33 [2024-10-24 12:32:15,576 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-24 12:32:16,381 INFO L124 PetriNetUnfolderBase]: 2638/4991 cut-off events. [2024-10-24 12:32:16,381 INFO L125 PetriNetUnfolderBase]: For 11716/11722 co-relation queries the response was YES. [2024-10-24 12:32:16,395 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14922 conditions, 4991 events. 2638/4991 cut-off events. For 11716/11722 co-relation queries the response was YES. Maximal size of possible extension queue 190. Compared 32053 event pairs, 313 based on Foata normal form. 254/5010 useless extension candidates. Maximal degree in co-relation 14895. Up to 1029 conditions per place. [2024-10-24 12:32:16,413 INFO L140 encePairwiseOnDemand]: 27/33 looper letters, 157 selfloop transitions, 44 changer transitions 37/244 dead transitions. [2024-10-24 12:32:16,413 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 97 places, 244 transitions, 1960 flow [2024-10-24 12:32:16,413 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-10-24 12:32:16,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-10-24 12:32:16,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 195 transitions. [2024-10-24 12:32:16,414 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5909090909090909 [2024-10-24 12:32:16,414 INFO L175 Difference]: Start difference. First operand has 88 places, 82 transitions, 569 flow. Second operand 10 states and 195 transitions. [2024-10-24 12:32:16,414 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 97 places, 244 transitions, 1960 flow [2024-10-24 12:32:16,437 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 89 places, 244 transitions, 1855 flow, removed 27 selfloop flow, removed 8 redundant places. [2024-10-24 12:32:16,443 INFO L231 Difference]: Finished difference. Result has 96 places, 125 transitions, 1100 flow [2024-10-24 12:32:16,444 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=497, PETRI_DIFFERENCE_MINUEND_PLACES=80, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=82, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1100, PETRI_PLACES=96, PETRI_TRANSITIONS=125} [2024-10-24 12:32:16,444 INFO L277 CegarLoopForPetriNet]: 32 programPoint places, 64 predicate places. [2024-10-24 12:32:16,448 INFO L471 AbstractCegarLoop]: Abstraction has has 96 places, 125 transitions, 1100 flow [2024-10-24 12:32:16,448 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.25) internal successors, (98), 8 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 12:32:16,448 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-24 12:32:16,448 INFO L204 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-24 12:32:16,468 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2024-10-24 12:32:16,649 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-24 12:32:16,649 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-24 12:32:16,650 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 12:32:16,650 INFO L85 PathProgramCache]: Analyzing trace with hash -816991887, now seen corresponding path program 4 times [2024-10-24 12:32:16,650 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 12:32:16,650 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [957239165] [2024-10-24 12:32:16,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 12:32:16,650 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 12:32:16,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 12:32:16,866 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-10-24 12:32:16,867 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 12:32:16,868 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [957239165] [2024-10-24 12:32:16,869 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [957239165] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-24 12:32:16,869 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-24 12:32:16,869 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-10-24 12:32:16,870 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1833782562] [2024-10-24 12:32:16,870 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-24 12:32:16,870 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-10-24 12:32:16,870 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-24 12:32:16,871 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-10-24 12:32:16,871 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-10-24 12:32:16,875 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 33 [2024-10-24 12:32:16,875 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 96 places, 125 transitions, 1100 flow. Second operand has 4 states, 4 states have (on average 13.5) internal successors, (54), 4 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 12:32:16,875 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-24 12:32:16,876 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 33 [2024-10-24 12:32:16,876 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-24 12:32:17,555 INFO L124 PetriNetUnfolderBase]: 2331/4449 cut-off events. [2024-10-24 12:32:17,556 INFO L125 PetriNetUnfolderBase]: For 17060/17216 co-relation queries the response was YES. [2024-10-24 12:32:17,572 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15879 conditions, 4449 events. 2331/4449 cut-off events. For 17060/17216 co-relation queries the response was YES. Maximal size of possible extension queue 148. Compared 28556 event pairs, 528 based on Foata normal form. 268/4503 useless extension candidates. Maximal degree in co-relation 15849. Up to 2274 conditions per place. [2024-10-24 12:32:17,594 INFO L140 encePairwiseOnDemand]: 29/33 looper letters, 130 selfloop transitions, 4 changer transitions 0/139 dead transitions. [2024-10-24 12:32:17,595 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 97 places, 139 transitions, 1521 flow [2024-10-24 12:32:17,595 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-10-24 12:32:17,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-10-24 12:32:17,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 64 transitions. [2024-10-24 12:32:17,596 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.48484848484848486 [2024-10-24 12:32:17,596 INFO L175 Difference]: Start difference. First operand has 96 places, 125 transitions, 1100 flow. Second operand 4 states and 64 transitions. [2024-10-24 12:32:17,596 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 97 places, 139 transitions, 1521 flow [2024-10-24 12:32:17,629 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 94 places, 139 transitions, 1415 flow, removed 48 selfloop flow, removed 3 redundant places. [2024-10-24 12:32:17,633 INFO L231 Difference]: Finished difference. Result has 96 places, 109 transitions, 883 flow [2024-10-24 12:32:17,633 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=860, PETRI_DIFFERENCE_MINUEND_PLACES=91, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=108, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=105, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=883, PETRI_PLACES=96, PETRI_TRANSITIONS=109} [2024-10-24 12:32:17,634 INFO L277 CegarLoopForPetriNet]: 32 programPoint places, 64 predicate places. [2024-10-24 12:32:17,634 INFO L471 AbstractCegarLoop]: Abstraction has has 96 places, 109 transitions, 883 flow [2024-10-24 12:32:17,635 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 13.5) internal successors, (54), 4 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 12:32:17,635 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-24 12:32:17,635 INFO L204 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-24 12:32:17,635 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-10-24 12:32:17,635 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-24 12:32:17,636 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 12:32:17,636 INFO L85 PathProgramCache]: Analyzing trace with hash -1577166038, now seen corresponding path program 1 times [2024-10-24 12:32:17,636 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 12:32:17,636 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [252966287] [2024-10-24 12:32:17,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 12:32:17,636 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 12:32:17,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 12:32:18,828 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 12:32:18,828 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 12:32:18,828 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [252966287] [2024-10-24 12:32:18,829 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [252966287] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-24 12:32:18,829 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [675977784] [2024-10-24 12:32:18,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 12:32:18,829 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-24 12:32:18,829 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-24 12:32:18,831 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) [2024-10-24 12:32:18,833 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-10-24 12:32:18,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 12:32:18,935 INFO L255 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 35 conjuncts are in the unsatisfiable core [2024-10-24 12:32:18,937 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-24 12:32:19,024 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 1 [2024-10-24 12:32:19,580 INFO L349 Elim1Store]: treesize reduction 38, result has 15.6 percent of original size [2024-10-24 12:32:19,580 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 47 treesize of output 20 [2024-10-24 12:32:19,594 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 12:32:19,594 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-24 12:32:20,685 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 116 treesize of output 104 [2024-10-24 12:32:20,729 INFO L349 Elim1Store]: treesize reduction 8, result has 82.2 percent of original size [2024-10-24 12:32:20,729 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 224 treesize of output 196 [2024-10-24 12:32:22,452 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 12:32:22,452 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [675977784] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-24 12:32:22,453 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-24 12:32:22,453 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 11] total 31 [2024-10-24 12:32:22,453 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1538598598] [2024-10-24 12:32:22,453 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-24 12:32:22,453 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2024-10-24 12:32:22,454 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-24 12:32:22,456 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2024-10-24 12:32:22,456 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=164, Invalid=828, Unknown=0, NotChecked=0, Total=992 [2024-10-24 12:32:22,758 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 33 [2024-10-24 12:32:22,759 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 96 places, 109 transitions, 883 flow. Second operand has 32 states, 32 states have (on average 11.40625) internal successors, (365), 32 states have internal predecessors, (365), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 12:32:22,759 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-24 12:32:22,759 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 33 [2024-10-24 12:32:22,759 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-24 12:32:27,106 INFO L124 PetriNetUnfolderBase]: 4917/10235 cut-off events. [2024-10-24 12:32:27,106 INFO L125 PetriNetUnfolderBase]: For 34130/34374 co-relation queries the response was YES. [2024-10-24 12:32:27,157 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35061 conditions, 10235 events. 4917/10235 cut-off events. For 34130/34374 co-relation queries the response was YES. Maximal size of possible extension queue 258. Compared 79056 event pairs, 1020 based on Foata normal form. 147/9808 useless extension candidates. Maximal degree in co-relation 35030. Up to 1941 conditions per place. [2024-10-24 12:32:27,201 INFO L140 encePairwiseOnDemand]: 23/33 looper letters, 259 selfloop transitions, 231 changer transitions 140/640 dead transitions. [2024-10-24 12:32:27,201 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 142 places, 640 transitions, 5399 flow [2024-10-24 12:32:27,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2024-10-24 12:32:27,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2024-10-24 12:32:27,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 814 transitions. [2024-10-24 12:32:27,209 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.524822695035461 [2024-10-24 12:32:27,210 INFO L175 Difference]: Start difference. First operand has 96 places, 109 transitions, 883 flow. Second operand 47 states and 814 transitions. [2024-10-24 12:32:27,210 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 142 places, 640 transitions, 5399 flow [2024-10-24 12:32:27,449 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 140 places, 640 transitions, 5378 flow, removed 7 selfloop flow, removed 2 redundant places. [2024-10-24 12:32:27,457 INFO L231 Difference]: Finished difference. Result has 171 places, 307 transitions, 3839 flow [2024-10-24 12:32:27,458 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=873, PETRI_DIFFERENCE_MINUEND_PLACES=94, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=109, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=65, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=47, PETRI_FLOW=3839, PETRI_PLACES=171, PETRI_TRANSITIONS=307} [2024-10-24 12:32:27,458 INFO L277 CegarLoopForPetriNet]: 32 programPoint places, 139 predicate places. [2024-10-24 12:32:27,458 INFO L471 AbstractCegarLoop]: Abstraction has has 171 places, 307 transitions, 3839 flow [2024-10-24 12:32:27,459 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 11.40625) internal successors, (365), 32 states have internal predecessors, (365), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 12:32:27,459 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-24 12:32:27,459 INFO L204 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-24 12:32:27,478 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-10-24 12:32:27,660 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-24 12:32:27,660 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-24 12:32:27,661 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 12:32:27,661 INFO L85 PathProgramCache]: Analyzing trace with hash 2050288058, now seen corresponding path program 2 times [2024-10-24 12:32:27,661 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 12:32:27,661 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [487928536] [2024-10-24 12:32:27,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 12:32:27,662 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 12:32:27,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 12:32:28,556 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 12:32:28,557 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 12:32:28,557 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [487928536] [2024-10-24 12:32:28,557 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [487928536] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-24 12:32:28,557 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [431001732] [2024-10-24 12:32:28,558 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-24 12:32:28,559 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-24 12:32:28,559 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-24 12:32:28,561 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) [2024-10-24 12:32:28,563 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-10-24 12:32:28,643 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-24 12:32:28,643 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-24 12:32:28,646 INFO L255 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 35 conjuncts are in the unsatisfiable core [2024-10-24 12:32:28,648 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-24 12:32:29,237 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 12:32:29,238 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-24 12:32:29,633 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-24 12:32:29,634 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 75 treesize of output 60 [2024-10-24 12:32:30,076 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 12:32:30,076 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [431001732] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-24 12:32:30,076 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-24 12:32:30,076 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 11] total 29 [2024-10-24 12:32:30,076 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1223351197] [2024-10-24 12:32:30,077 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-24 12:32:30,077 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2024-10-24 12:32:30,077 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-24 12:32:30,078 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2024-10-24 12:32:30,078 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=151, Invalid=719, Unknown=0, NotChecked=0, Total=870 [2024-10-24 12:32:30,300 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 33 [2024-10-24 12:32:30,301 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 171 places, 307 transitions, 3839 flow. Second operand has 30 states, 30 states have (on average 11.666666666666666) internal successors, (350), 30 states have internal predecessors, (350), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 12:32:30,301 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-24 12:32:30,301 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 33 [2024-10-24 12:32:30,301 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-24 12:32:37,439 INFO L124 PetriNetUnfolderBase]: 9203/18665 cut-off events. [2024-10-24 12:32:37,439 INFO L125 PetriNetUnfolderBase]: For 175793/176195 co-relation queries the response was YES. [2024-10-24 12:32:37,585 INFO L83 FinitePrefix]: Finished finitePrefix Result has 81819 conditions, 18665 events. 9203/18665 cut-off events. For 175793/176195 co-relation queries the response was YES. Maximal size of possible extension queue 480. Compared 153942 event pairs, 2015 based on Foata normal form. 149/17797 useless extension candidates. Maximal degree in co-relation 81759. Up to 3890 conditions per place. [2024-10-24 12:32:37,632 INFO L140 encePairwiseOnDemand]: 23/33 looper letters, 218 selfloop transitions, 170 changer transitions 644/1042 dead transitions. [2024-10-24 12:32:37,632 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 224 places, 1042 transitions, 12978 flow [2024-10-24 12:32:37,634 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2024-10-24 12:32:37,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2024-10-24 12:32:37,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 908 transitions. [2024-10-24 12:32:37,641 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5095398428731762 [2024-10-24 12:32:37,642 INFO L175 Difference]: Start difference. First operand has 171 places, 307 transitions, 3839 flow. Second operand 54 states and 908 transitions. [2024-10-24 12:32:37,642 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 224 places, 1042 transitions, 12978 flow [2024-10-24 12:32:38,464 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 216 places, 1042 transitions, 11268 flow, removed 845 selfloop flow, removed 8 redundant places. [2024-10-24 12:32:38,476 INFO L231 Difference]: Finished difference. Result has 239 places, 300 transitions, 4219 flow [2024-10-24 12:32:38,476 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=3265, PETRI_DIFFERENCE_MINUEND_PLACES=163, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=307, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=98, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=176, PETRI_DIFFERENCE_SUBTRAHEND_STATES=54, PETRI_FLOW=4219, PETRI_PLACES=239, PETRI_TRANSITIONS=300} [2024-10-24 12:32:38,477 INFO L277 CegarLoopForPetriNet]: 32 programPoint places, 207 predicate places. [2024-10-24 12:32:38,477 INFO L471 AbstractCegarLoop]: Abstraction has has 239 places, 300 transitions, 4219 flow [2024-10-24 12:32:38,478 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 11.666666666666666) internal successors, (350), 30 states have internal predecessors, (350), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 12:32:38,478 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-24 12:32:38,478 INFO L204 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-24 12:32:38,498 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-10-24 12:32:38,682 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2024-10-24 12:32:38,683 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-24 12:32:38,684 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 12:32:38,684 INFO L85 PathProgramCache]: Analyzing trace with hash -757545435, now seen corresponding path program 3 times [2024-10-24 12:32:38,684 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 12:32:38,684 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1753276589] [2024-10-24 12:32:38,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 12:32:38,684 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 12:32:38,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 12:32:40,220 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 12:32:40,221 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 12:32:40,223 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1753276589] [2024-10-24 12:32:40,223 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1753276589] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-24 12:32:40,223 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1638576182] [2024-10-24 12:32:40,223 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-10-24 12:32:40,224 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-24 12:32:40,224 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-24 12:32:40,226 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) [2024-10-24 12:32:40,227 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-10-24 12:32:40,310 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-10-24 12:32:40,310 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-24 12:32:40,313 INFO L255 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 27 conjuncts are in the unsatisfiable core [2024-10-24 12:32:40,316 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-24 12:32:40,595 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-24 12:32:40,596 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-24 12:32:40,827 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-24 12:32:40,828 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 75 treesize of output 60 [2024-10-24 12:32:40,938 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-10-24 12:32:40,939 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1638576182] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-24 12:32:40,939 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-24 12:32:40,939 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 9, 7] total 25 [2024-10-24 12:32:40,939 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1572432232] [2024-10-24 12:32:40,939 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-24 12:32:40,939 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2024-10-24 12:32:40,940 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-24 12:32:40,940 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2024-10-24 12:32:40,941 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=542, Unknown=0, NotChecked=0, Total=650 [2024-10-24 12:32:41,120 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 33 [2024-10-24 12:32:41,121 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 239 places, 300 transitions, 4219 flow. Second operand has 26 states, 26 states have (on average 12.038461538461538) internal successors, (313), 26 states have internal predecessors, (313), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 12:32:41,121 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-24 12:32:41,121 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 33 [2024-10-24 12:32:41,121 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-24 12:32:44,216 INFO L124 PetriNetUnfolderBase]: 4847/9896 cut-off events. [2024-10-24 12:32:44,216 INFO L125 PetriNetUnfolderBase]: For 147353/147597 co-relation queries the response was YES. [2024-10-24 12:32:44,275 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47844 conditions, 9896 events. 4847/9896 cut-off events. For 147353/147597 co-relation queries the response was YES. Maximal size of possible extension queue 231. Compared 73382 event pairs, 1441 based on Foata normal form. 55/9411 useless extension candidates. Maximal degree in co-relation 47763. Up to 4278 conditions per place. [2024-10-24 12:32:44,307 INFO L140 encePairwiseOnDemand]: 23/33 looper letters, 231 selfloop transitions, 218 changer transitions 98/557 dead transitions. [2024-10-24 12:32:44,308 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 235 places, 557 transitions, 7704 flow [2024-10-24 12:32:44,308 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2024-10-24 12:32:44,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2024-10-24 12:32:44,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 551 transitions. [2024-10-24 12:32:44,310 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4910873440285205 [2024-10-24 12:32:44,310 INFO L175 Difference]: Start difference. First operand has 239 places, 300 transitions, 4219 flow. Second operand 34 states and 551 transitions. [2024-10-24 12:32:44,310 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 235 places, 557 transitions, 7704 flow [2024-10-24 12:32:44,983 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 201 places, 557 transitions, 6251 flow, removed 520 selfloop flow, removed 34 redundant places. [2024-10-24 12:32:44,991 INFO L231 Difference]: Finished difference. Result has 209 places, 359 transitions, 4622 flow [2024-10-24 12:32:44,992 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=3290, PETRI_DIFFERENCE_MINUEND_PLACES=168, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=300, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=160, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=125, PETRI_DIFFERENCE_SUBTRAHEND_STATES=34, PETRI_FLOW=4622, PETRI_PLACES=209, PETRI_TRANSITIONS=359} [2024-10-24 12:32:44,992 INFO L277 CegarLoopForPetriNet]: 32 programPoint places, 177 predicate places. [2024-10-24 12:32:44,993 INFO L471 AbstractCegarLoop]: Abstraction has has 209 places, 359 transitions, 4622 flow [2024-10-24 12:32:44,993 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 12.038461538461538) internal successors, (313), 26 states have internal predecessors, (313), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 12:32:44,993 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-24 12:32:44,994 INFO L204 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-24 12:32:45,008 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-10-24 12:32:45,195 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-24 12:32:45,196 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-24 12:32:45,196 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 12:32:45,196 INFO L85 PathProgramCache]: Analyzing trace with hash -643524669, now seen corresponding path program 4 times [2024-10-24 12:32:45,196 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 12:32:45,196 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1820176469] [2024-10-24 12:32:45,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 12:32:45,197 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 12:32:45,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 12:32:47,054 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 12:32:47,055 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 12:32:47,055 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1820176469] [2024-10-24 12:32:47,055 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1820176469] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-24 12:32:47,055 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1813698295] [2024-10-24 12:32:47,055 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-10-24 12:32:47,056 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-24 12:32:47,056 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-24 12:32:47,057 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) [2024-10-24 12:32:47,059 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-10-24 12:32:47,149 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-10-24 12:32:47,150 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-24 12:32:47,151 INFO L255 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 27 conjuncts are in the unsatisfiable core [2024-10-24 12:32:47,153 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-24 12:32:47,457 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-24 12:32:47,457 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-24 12:32:47,724 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-24 12:32:47,725 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 75 treesize of output 60 [2024-10-24 12:32:47,821 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-10-24 12:32:47,822 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1813698295] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-24 12:32:47,822 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-24 12:32:47,822 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 9, 7] total 26 [2024-10-24 12:32:47,823 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [437822] [2024-10-24 12:32:47,823 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-24 12:32:47,823 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2024-10-24 12:32:47,824 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-24 12:32:47,824 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2024-10-24 12:32:47,825 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=571, Unknown=0, NotChecked=0, Total=702 [2024-10-24 12:32:48,002 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 33 [2024-10-24 12:32:48,002 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 209 places, 359 transitions, 4622 flow. Second operand has 27 states, 27 states have (on average 12.0) internal successors, (324), 27 states have internal predecessors, (324), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 12:32:48,002 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-24 12:32:48,002 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 33 [2024-10-24 12:32:48,003 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-24 12:32:50,485 INFO L124 PetriNetUnfolderBase]: 5113/10447 cut-off events. [2024-10-24 12:32:50,485 INFO L125 PetriNetUnfolderBase]: For 92194/92436 co-relation queries the response was YES. [2024-10-24 12:32:50,557 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45146 conditions, 10447 events. 5113/10447 cut-off events. For 92194/92436 co-relation queries the response was YES. Maximal size of possible extension queue 232. Compared 77892 event pairs, 1576 based on Foata normal form. 41/9920 useless extension candidates. Maximal degree in co-relation 45082. Up to 4860 conditions per place. [2024-10-24 12:32:50,720 INFO L140 encePairwiseOnDemand]: 23/33 looper letters, 263 selfloop transitions, 207 changer transitions 76/556 dead transitions. [2024-10-24 12:32:50,721 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 238 places, 556 transitions, 7046 flow [2024-10-24 12:32:50,724 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2024-10-24 12:32:50,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2024-10-24 12:32:50,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 485 transitions. [2024-10-24 12:32:50,726 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4898989898989899 [2024-10-24 12:32:50,726 INFO L175 Difference]: Start difference. First operand has 209 places, 359 transitions, 4622 flow. Second operand 30 states and 485 transitions. [2024-10-24 12:32:50,726 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 238 places, 556 transitions, 7046 flow [2024-10-24 12:32:50,966 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 229 places, 556 transitions, 6679 flow, removed 141 selfloop flow, removed 9 redundant places. [2024-10-24 12:32:50,972 INFO L231 Difference]: Finished difference. Result has 231 places, 383 transitions, 5096 flow [2024-10-24 12:32:50,972 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=4281, PETRI_DIFFERENCE_MINUEND_PLACES=200, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=359, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=183, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=163, PETRI_DIFFERENCE_SUBTRAHEND_STATES=30, PETRI_FLOW=5096, PETRI_PLACES=231, PETRI_TRANSITIONS=383} [2024-10-24 12:32:50,973 INFO L277 CegarLoopForPetriNet]: 32 programPoint places, 199 predicate places. [2024-10-24 12:32:50,973 INFO L471 AbstractCegarLoop]: Abstraction has has 231 places, 383 transitions, 5096 flow [2024-10-24 12:32:50,973 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 12.0) internal successors, (324), 27 states have internal predecessors, (324), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 12:32:50,973 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-24 12:32:50,973 INFO L204 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-24 12:32:50,990 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2024-10-24 12:32:51,177 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-24 12:32:51,178 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-24 12:32:51,178 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 12:32:51,178 INFO L85 PathProgramCache]: Analyzing trace with hash -194001388, now seen corresponding path program 5 times [2024-10-24 12:32:51,179 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 12:32:51,179 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1372037468] [2024-10-24 12:32:51,179 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 12:32:51,179 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 12:32:51,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 12:32:51,379 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 7 proven. 5 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-10-24 12:32:51,379 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 12:32:51,379 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1372037468] [2024-10-24 12:32:51,380 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1372037468] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-24 12:32:51,380 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1928056434] [2024-10-24 12:32:51,380 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-10-24 12:32:51,380 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-24 12:32:51,380 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-24 12:32:51,382 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) [2024-10-24 12:32:51,384 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-10-24 12:32:51,469 INFO L227 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2024-10-24 12:32:51,469 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-24 12:32:51,471 INFO L255 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-10-24 12:32:51,473 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-24 12:32:51,577 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 9 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-10-24 12:32:51,577 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-24 12:32:51,676 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-10-24 12:32:51,676 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1928056434] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-24 12:32:51,676 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-24 12:32:51,676 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 17 [2024-10-24 12:32:51,676 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [177132906] [2024-10-24 12:32:51,676 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-24 12:32:51,677 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-10-24 12:32:51,677 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-24 12:32:51,677 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-10-24 12:32:51,678 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=224, Unknown=0, NotChecked=0, Total=306 [2024-10-24 12:32:51,703 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 33 [2024-10-24 12:32:51,704 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 231 places, 383 transitions, 5096 flow. Second operand has 18 states, 18 states have (on average 11.166666666666666) internal successors, (201), 18 states have internal predecessors, (201), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 12:32:51,704 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-24 12:32:51,704 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 33 [2024-10-24 12:32:51,704 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-24 12:32:53,086 INFO L124 PetriNetUnfolderBase]: 3260/6598 cut-off events. [2024-10-24 12:32:53,087 INFO L125 PetriNetUnfolderBase]: For 67710/67876 co-relation queries the response was YES. [2024-10-24 12:32:53,113 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30117 conditions, 6598 events. 3260/6598 cut-off events. For 67710/67876 co-relation queries the response was YES. Maximal size of possible extension queue 213. Compared 47002 event pairs, 2232 based on Foata normal form. 70/6307 useless extension candidates. Maximal degree in co-relation 30051. Up to 5253 conditions per place. [2024-10-24 12:32:53,128 INFO L140 encePairwiseOnDemand]: 29/33 looper letters, 196 selfloop transitions, 4 changer transitions 67/277 dead transitions. [2024-10-24 12:32:53,128 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 224 places, 277 transitions, 4040 flow [2024-10-24 12:32:53,128 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-10-24 12:32:53,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-10-24 12:32:53,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 143 transitions. [2024-10-24 12:32:53,129 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5416666666666666 [2024-10-24 12:32:53,129 INFO L175 Difference]: Start difference. First operand has 231 places, 383 transitions, 5096 flow. Second operand 8 states and 143 transitions. [2024-10-24 12:32:53,129 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 224 places, 277 transitions, 4040 flow [2024-10-24 12:32:53,252 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 194 places, 277 transitions, 3685 flow, removed 56 selfloop flow, removed 30 redundant places. [2024-10-24 12:32:53,255 INFO L231 Difference]: Finished difference. Result has 194 places, 210 transitions, 2627 flow [2024-10-24 12:32:53,256 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=3023, PETRI_DIFFERENCE_MINUEND_PLACES=187, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=243, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=239, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2627, PETRI_PLACES=194, PETRI_TRANSITIONS=210} [2024-10-24 12:32:53,256 INFO L277 CegarLoopForPetriNet]: 32 programPoint places, 162 predicate places. [2024-10-24 12:32:53,256 INFO L471 AbstractCegarLoop]: Abstraction has has 194 places, 210 transitions, 2627 flow [2024-10-24 12:32:53,257 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 11.166666666666666) internal successors, (201), 18 states have internal predecessors, (201), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 12:32:53,257 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-24 12:32:53,257 INFO L204 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 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, 1] [2024-10-24 12:32:53,270 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2024-10-24 12:32:53,457 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,SelfDestructingSolverStorable13 [2024-10-24 12:32:53,458 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-24 12:32:53,458 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 12:32:53,458 INFO L85 PathProgramCache]: Analyzing trace with hash -1690058887, now seen corresponding path program 6 times [2024-10-24 12:32:53,458 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 12:32:53,458 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1699097898] [2024-10-24 12:32:53,459 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 12:32:53,459 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 12:32:53,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 12:32:53,620 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 9 proven. 9 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-10-24 12:32:53,620 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 12:32:53,620 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1699097898] [2024-10-24 12:32:53,621 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1699097898] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-24 12:32:53,621 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1036973137] [2024-10-24 12:32:53,621 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-10-24 12:32:53,621 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-24 12:32:53,621 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-24 12:32:53,623 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) [2024-10-24 12:32:53,625 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-10-24 12:32:53,717 INFO L227 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2024-10-24 12:32:53,718 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-24 12:32:53,719 INFO L255 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-10-24 12:32:53,721 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-24 12:32:53,775 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 7 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-10-24 12:32:53,775 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-24 12:32:53,863 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 7 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-10-24 12:32:53,863 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1036973137] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-24 12:32:53,863 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-24 12:32:53,863 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 10 [2024-10-24 12:32:53,863 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1231230845] [2024-10-24 12:32:53,863 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-24 12:32:53,864 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-10-24 12:32:53,864 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-24 12:32:53,864 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-10-24 12:32:53,865 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2024-10-24 12:32:53,874 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 33 [2024-10-24 12:32:53,875 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 194 places, 210 transitions, 2627 flow. Second operand has 11 states, 11 states have (on average 11.818181818181818) internal successors, (130), 11 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 12:32:53,875 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-24 12:32:53,875 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 33 [2024-10-24 12:32:53,875 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-24 12:32:55,578 INFO L124 PetriNetUnfolderBase]: 5628/10773 cut-off events. [2024-10-24 12:32:55,578 INFO L125 PetriNetUnfolderBase]: For 79555/79573 co-relation queries the response was YES. [2024-10-24 12:32:55,772 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45038 conditions, 10773 events. 5628/10773 cut-off events. For 79555/79573 co-relation queries the response was YES. Maximal size of possible extension queue 226. Compared 74807 event pairs, 450 based on Foata normal form. 210/10378 useless extension candidates. Maximal degree in co-relation 44985. Up to 2017 conditions per place. [2024-10-24 12:32:55,803 INFO L140 encePairwiseOnDemand]: 24/33 looper letters, 260 selfloop transitions, 223 changer transitions 48/538 dead transitions. [2024-10-24 12:32:55,803 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 187 places, 538 transitions, 7016 flow [2024-10-24 12:32:55,804 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2024-10-24 12:32:55,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2024-10-24 12:32:55,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 350 transitions. [2024-10-24 12:32:55,805 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4820936639118457 [2024-10-24 12:32:55,805 INFO L175 Difference]: Start difference. First operand has 194 places, 210 transitions, 2627 flow. Second operand 22 states and 350 transitions. [2024-10-24 12:32:55,805 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 187 places, 538 transitions, 7016 flow [2024-10-24 12:32:55,937 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 167 places, 538 transitions, 6374 flow, removed 168 selfloop flow, removed 20 redundant places. [2024-10-24 12:32:55,943 INFO L231 Difference]: Finished difference. Result has 178 places, 372 transitions, 5154 flow [2024-10-24 12:32:55,944 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=2407, PETRI_DIFFERENCE_MINUEND_PLACES=146, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=210, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=96, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=81, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=5154, PETRI_PLACES=178, PETRI_TRANSITIONS=372} [2024-10-24 12:32:55,944 INFO L277 CegarLoopForPetriNet]: 32 programPoint places, 146 predicate places. [2024-10-24 12:32:55,944 INFO L471 AbstractCegarLoop]: Abstraction has has 178 places, 372 transitions, 5154 flow [2024-10-24 12:32:55,945 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.818181818181818) internal successors, (130), 11 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 12:32:55,945 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-24 12:32:55,945 INFO L204 CegarLoopForPetriNet]: trace histogram [4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-24 12:32:55,958 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2024-10-24 12:32:56,145 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,SelfDestructingSolverStorable14 [2024-10-24 12:32:56,146 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-24 12:32:56,146 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 12:32:56,146 INFO L85 PathProgramCache]: Analyzing trace with hash 1686183909, now seen corresponding path program 7 times [2024-10-24 12:32:56,146 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 12:32:56,147 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1720087920] [2024-10-24 12:32:56,147 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 12:32:56,147 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 12:32:56,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 12:32:57,496 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 1 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 12:32:57,496 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 12:32:57,496 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1720087920] [2024-10-24 12:32:57,497 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1720087920] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-24 12:32:57,497 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [306899518] [2024-10-24 12:32:57,497 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-10-24 12:32:57,497 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-24 12:32:57,497 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-24 12:32:57,499 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) [2024-10-24 12:32:57,500 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-10-24 12:32:57,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 12:32:57,594 INFO L255 TraceCheckSpWp]: Trace formula consists of 213 conjuncts, 44 conjuncts are in the unsatisfiable core [2024-10-24 12:32:57,597 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-24 12:32:57,695 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 1 [2024-10-24 12:32:58,677 INFO L349 Elim1Store]: treesize reduction 99, result has 9.2 percent of original size [2024-10-24 12:32:58,678 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 68 treesize of output 27 [2024-10-24 12:32:58,689 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 3 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 12:32:58,689 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-24 12:33:00,173 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 169 treesize of output 151 [2024-10-24 12:33:00,255 INFO L349 Elim1Store]: treesize reduction 24, result has 78.0 percent of original size [2024-10-24 12:33:00,256 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 536 treesize of output 442 [2024-10-24 12:33:06,557 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 12:33:06,558 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [306899518] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-24 12:33:06,558 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-24 12:33:06,558 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 15, 15] total 44 [2024-10-24 12:33:06,558 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2047147273] [2024-10-24 12:33:06,558 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-24 12:33:06,559 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2024-10-24 12:33:06,559 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-24 12:33:06,559 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2024-10-24 12:33:06,560 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=302, Invalid=1678, Unknown=0, NotChecked=0, Total=1980 [2024-10-24 12:33:06,934 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 33 [2024-10-24 12:33:06,935 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 178 places, 372 transitions, 5154 flow. Second operand has 45 states, 45 states have (on average 11.244444444444444) internal successors, (506), 45 states have internal predecessors, (506), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 12:33:06,935 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-24 12:33:06,935 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 33 [2024-10-24 12:33:06,935 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand