./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/weaver/chl-nzb-file-symm.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 803cd42f Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/weaver/chl-nzb-file-symm.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 48ddce9ee02b3ea4431cf137593b71facb450c3e223dbff4f116c3c0ac1377b5 --- Real Ultimate output --- This is Ultimate 0.2.5-tmp.dk.eval-assert-order-craig-803cd42-m [2024-11-22 13:45:03,412 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-22 13:45:03,491 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-11-22 13:45:03,496 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-22 13:45:03,496 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-22 13:45:03,516 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-22 13:45:03,517 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-22 13:45:03,517 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-22 13:45:03,518 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-22 13:45:03,518 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-22 13:45:03,519 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-22 13:45:03,519 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-22 13:45:03,520 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-22 13:45:03,520 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-22 13:45:03,520 INFO L153 SettingsManager]: * Use SBE=true [2024-11-22 13:45:03,521 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-22 13:45:03,521 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-11-22 13:45:03,522 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-22 13:45:03,522 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-22 13:45:03,522 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-22 13:45:03,523 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-22 13:45:03,526 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-11-22 13:45:03,526 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-22 13:45:03,527 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-11-22 13:45:03,527 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-22 13:45:03,527 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-22 13:45:03,528 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-11-22 13:45:03,528 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-22 13:45:03,528 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-22 13:45:03,529 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-22 13:45:03,529 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-22 13:45:03,529 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-22 13:45:03,530 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-22 13:45:03,530 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-22 13:45:03,530 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-22 13:45:03,531 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-11-22 13:45:03,531 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-22 13:45:03,531 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-22 13:45:03,532 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-22 13:45:03,532 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-22 13:45:03,532 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-22 13:45:03,533 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-22 13:45:03,533 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 48ddce9ee02b3ea4431cf137593b71facb450c3e223dbff4f116c3c0ac1377b5 [2024-11-22 13:45:03,789 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-22 13:45:03,811 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-22 13:45:03,814 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-22 13:45:03,816 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-22 13:45:03,816 INFO L274 PluginConnector]: CDTParser initialized [2024-11-22 13:45:03,818 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/weaver/chl-nzb-file-symm.wvr.c [2024-11-22 13:45:05,268 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-22 13:45:05,471 INFO L384 CDTParser]: Found 1 translation units. [2024-11-22 13:45:05,471 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/chl-nzb-file-symm.wvr.c [2024-11-22 13:45:05,482 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ad63f2a00/e31985bcee6e49e3bef04539d378dd28/FLAG694df2fec [2024-11-22 13:45:05,495 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ad63f2a00/e31985bcee6e49e3bef04539d378dd28 [2024-11-22 13:45:05,499 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-22 13:45:05,501 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-22 13:45:05,502 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-22 13:45:05,502 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-22 13:45:05,507 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-22 13:45:05,507 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.11 01:45:05" (1/1) ... [2024-11-22 13:45:05,508 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5f045be2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:45:05, skipping insertion in model container [2024-11-22 13:45:05,508 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.11 01:45:05" (1/1) ... [2024-11-22 13:45:05,537 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-22 13:45:05,776 WARN L250 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/chl-nzb-file-symm.wvr.c[4955,4968] [2024-11-22 13:45:05,788 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-22 13:45:05,797 INFO L200 MainTranslator]: Completed pre-run [2024-11-22 13:45:05,828 WARN L250 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/chl-nzb-file-symm.wvr.c[4955,4968] [2024-11-22 13:45:05,835 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-22 13:45:05,856 INFO L204 MainTranslator]: Completed translation [2024-11-22 13:45:05,856 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:45:05 WrapperNode [2024-11-22 13:45:05,856 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-22 13:45:05,858 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-22 13:45:05,858 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-22 13:45:05,858 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-22 13:45:05,864 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:45:05" (1/1) ... [2024-11-22 13:45:05,873 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:45:05" (1/1) ... [2024-11-22 13:45:05,916 INFO L138 Inliner]: procedures = 24, calls = 45, calls flagged for inlining = 21, calls inlined = 29, statements flattened = 407 [2024-11-22 13:45:05,917 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-22 13:45:05,922 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-22 13:45:05,922 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-22 13:45:05,922 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-22 13:45:05,933 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:45:05" (1/1) ... [2024-11-22 13:45:05,934 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:45:05" (1/1) ... [2024-11-22 13:45:05,941 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:45:05" (1/1) ... [2024-11-22 13:45:05,981 INFO L175 MemorySlicer]: Split 20 memory accesses to 2 slices as follows [2, 18]. 90 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0]. The 2 writes are split as follows [0, 2]. [2024-11-22 13:45:05,981 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:45:05" (1/1) ... [2024-11-22 13:45:05,981 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:45:05" (1/1) ... [2024-11-22 13:45:05,997 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:45:05" (1/1) ... [2024-11-22 13:45:06,004 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:45:05" (1/1) ... [2024-11-22 13:45:06,010 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:45:05" (1/1) ... [2024-11-22 13:45:06,013 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:45:05" (1/1) ... [2024-11-22 13:45:06,023 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-22 13:45:06,029 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-22 13:45:06,029 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-22 13:45:06,029 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-22 13:45:06,030 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:45:05" (1/1) ... [2024-11-22 13:45:06,036 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-22 13:45:06,054 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-22 13:45:06,073 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-11-22 13:45:06,080 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-11-22 13:45:06,129 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-22 13:45:06,129 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2024-11-22 13:45:06,130 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2024-11-22 13:45:06,130 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2024-11-22 13:45:06,130 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2024-11-22 13:45:06,131 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-11-22 13:45:06,131 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-11-22 13:45:06,131 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-11-22 13:45:06,132 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-11-22 13:45:06,133 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-11-22 13:45:06,133 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-22 13:45:06,133 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-22 13:45:06,134 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-11-22 13:45:06,134 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-11-22 13:45:06,136 WARN L207 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2024-11-22 13:45:06,302 INFO L238 CfgBuilder]: Building ICFG [2024-11-22 13:45:06,305 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-22 13:45:06,954 INFO L283 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2024-11-22 13:45:06,954 INFO L287 CfgBuilder]: Performing block encoding [2024-11-22 13:45:07,648 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-22 13:45:07,649 INFO L316 CfgBuilder]: Removed 4 assume(true) statements. [2024-11-22 13:45:07,649 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 01:45:07 BoogieIcfgContainer [2024-11-22 13:45:07,649 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-22 13:45:07,652 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-22 13:45:07,653 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-22 13:45:07,656 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-22 13:45:07,657 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.11 01:45:05" (1/3) ... [2024-11-22 13:45:07,657 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@19938bf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.11 01:45:07, skipping insertion in model container [2024-11-22 13:45:07,658 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:45:05" (2/3) ... [2024-11-22 13:45:07,658 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@19938bf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.11 01:45:07, skipping insertion in model container [2024-11-22 13:45:07,659 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 01:45:07" (3/3) ... [2024-11-22 13:45:07,660 INFO L112 eAbstractionObserver]: Analyzing ICFG chl-nzb-file-symm.wvr.c [2024-11-22 13:45:07,678 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-22 13:45:07,679 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-11-22 13:45:07,679 INFO L489 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-11-22 13:45:07,774 INFO L143 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2024-11-22 13:45:07,811 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 33 places, 34 transitions, 82 flow [2024-11-22 13:45:07,887 INFO L124 PetriNetUnfolderBase]: 8/32 cut-off events. [2024-11-22 13:45:07,887 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-11-22 13:45:07,891 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41 conditions, 32 events. 8/32 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 42 event pairs, 0 based on Foata normal form. 0/23 useless extension candidates. Maximal degree in co-relation 23. Up to 2 conditions per place. [2024-11-22 13:45:07,892 INFO L82 GeneralOperation]: Start removeDead. Operand has 33 places, 34 transitions, 82 flow [2024-11-22 13:45:07,896 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 30 places, 31 transitions, 74 flow [2024-11-22 13:45:07,911 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-22 13:45:07,921 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;@145c8b28, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-22 13:45:07,921 INFO L334 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2024-11-22 13:45:07,939 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-11-22 13:45:07,939 INFO L124 PetriNetUnfolderBase]: 8/30 cut-off events. [2024-11-22 13:45:07,939 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-11-22 13:45:07,940 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-22 13:45:07,940 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-22 13:45:07,941 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-22 13:45:07,946 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 13:45:07,946 INFO L85 PathProgramCache]: Analyzing trace with hash 423359638, now seen corresponding path program 1 times [2024-11-22 13:45:07,955 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 13:45:07,955 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [686571962] [2024-11-22 13:45:07,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 13:45:07,956 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 13:45:08,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 13:45:08,470 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-22 13:45:08,470 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 13:45:08,470 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [686571962] [2024-11-22 13:45:08,471 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [686571962] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-22 13:45:08,471 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-22 13:45:08,472 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-22 13:45:08,473 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [258505768] [2024-11-22 13:45:08,474 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-22 13:45:08,483 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-22 13:45:08,488 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 13:45:08,517 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-22 13:45:08,518 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-22 13:45:08,519 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 34 [2024-11-22 13:45:08,523 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 30 places, 31 transitions, 74 flow. Second operand has 3 states, 3 states have (on average 8.333333333333334) internal successors, (25), 3 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-22 13:45:08,523 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-22 13:45:08,523 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 34 [2024-11-22 13:45:08,524 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-22 13:45:08,728 INFO L124 PetriNetUnfolderBase]: 202/329 cut-off events. [2024-11-22 13:45:08,729 INFO L125 PetriNetUnfolderBase]: For 23/23 co-relation queries the response was YES. [2024-11-22 13:45:08,731 INFO L83 FinitePrefix]: Finished finitePrefix Result has 685 conditions, 329 events. 202/329 cut-off events. For 23/23 co-relation queries the response was YES. Maximal size of possible extension queue 24. Compared 1001 event pairs, 138 based on Foata normal form. 0/265 useless extension candidates. Maximal degree in co-relation 620. Up to 327 conditions per place. [2024-11-22 13:45:08,736 INFO L140 encePairwiseOnDemand]: 27/34 looper letters, 26 selfloop transitions, 4 changer transitions 0/31 dead transitions. [2024-11-22 13:45:08,736 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 32 places, 31 transitions, 134 flow [2024-11-22 13:45:08,737 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-22 13:45:08,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-22 13:45:08,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 43 transitions. [2024-11-22 13:45:08,751 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4215686274509804 [2024-11-22 13:45:08,753 INFO L175 Difference]: Start difference. First operand has 30 places, 31 transitions, 74 flow. Second operand 3 states and 43 transitions. [2024-11-22 13:45:08,754 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 32 places, 31 transitions, 134 flow [2024-11-22 13:45:08,757 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 28 places, 31 transitions, 126 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-11-22 13:45:08,759 INFO L231 Difference]: Finished difference. Result has 29 places, 31 transitions, 84 flow [2024-11-22 13:45:08,761 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=62, PETRI_DIFFERENCE_MINUEND_PLACES=26, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=29, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=84, PETRI_PLACES=29, PETRI_TRANSITIONS=31} [2024-11-22 13:45:08,765 INFO L277 CegarLoopForPetriNet]: 30 programPoint places, -1 predicate places. [2024-11-22 13:45:08,765 INFO L471 AbstractCegarLoop]: Abstraction has has 29 places, 31 transitions, 84 flow [2024-11-22 13:45:08,765 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 8.333333333333334) internal successors, (25), 3 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-22 13:45:08,765 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-22 13:45:08,766 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-22 13:45:08,766 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-22 13:45:08,767 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-22 13:45:08,767 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 13:45:08,768 INFO L85 PathProgramCache]: Analyzing trace with hash -1120329308, now seen corresponding path program 1 times [2024-11-22 13:45:08,768 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 13:45:08,768 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1202110969] [2024-11-22 13:45:08,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 13:45:08,768 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 13:45:08,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 13:45:09,030 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-22 13:45:09,031 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 13:45:09,032 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1202110969] [2024-11-22 13:45:09,032 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1202110969] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-22 13:45:09,032 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1000061674] [2024-11-22 13:45:09,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 13:45:09,033 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 13:45:09,033 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-22 13:45:09,036 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-22 13:45:09,038 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-22 13:45:09,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 13:45:09,183 INFO L255 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 5 conjuncts are in the unsatisfiable core [2024-11-22 13:45:09,188 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-22 13:45:09,258 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-22 13:45:09,258 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-22 13:45:09,286 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-22 13:45:09,286 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1000061674] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-22 13:45:09,287 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-22 13:45:09,287 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 7 [2024-11-22 13:45:09,288 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [607040187] [2024-11-22 13:45:09,288 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-22 13:45:09,288 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-11-22 13:45:09,289 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 13:45:09,289 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-11-22 13:45:09,290 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=29, Unknown=0, NotChecked=0, Total=56 [2024-11-22 13:45:09,290 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 34 [2024-11-22 13:45:09,290 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 29 places, 31 transitions, 84 flow. Second operand has 8 states, 8 states have (on average 6.0) internal successors, (48), 8 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-22 13:45:09,290 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-22 13:45:09,291 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 34 [2024-11-22 13:45:09,291 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-22 13:45:09,450 INFO L124 PetriNetUnfolderBase]: 202/335 cut-off events. [2024-11-22 13:45:09,450 INFO L125 PetriNetUnfolderBase]: For 5/5 co-relation queries the response was YES. [2024-11-22 13:45:09,451 INFO L83 FinitePrefix]: Finished finitePrefix Result has 696 conditions, 335 events. 202/335 cut-off events. For 5/5 co-relation queries the response was YES. Maximal size of possible extension queue 24. Compared 999 event pairs, 138 based on Foata normal form. 3/275 useless extension candidates. Maximal degree in co-relation 666. Up to 327 conditions per place. [2024-11-22 13:45:09,453 INFO L140 encePairwiseOnDemand]: 29/34 looper letters, 26 selfloop transitions, 10 changer transitions 0/37 dead transitions. [2024-11-22 13:45:09,454 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 34 places, 37 transitions, 180 flow [2024-11-22 13:45:09,454 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-22 13:45:09,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-22 13:45:09,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 60 transitions. [2024-11-22 13:45:09,455 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.29411764705882354 [2024-11-22 13:45:09,455 INFO L175 Difference]: Start difference. First operand has 29 places, 31 transitions, 84 flow. Second operand 6 states and 60 transitions. [2024-11-22 13:45:09,456 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 34 places, 37 transitions, 180 flow [2024-11-22 13:45:09,457 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 33 places, 37 transitions, 176 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-22 13:45:09,458 INFO L231 Difference]: Finished difference. Result has 36 places, 37 transitions, 146 flow [2024-11-22 13:45:09,458 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=80, PETRI_DIFFERENCE_MINUEND_PLACES=28, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=31, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=146, PETRI_PLACES=36, PETRI_TRANSITIONS=37} [2024-11-22 13:45:09,459 INFO L277 CegarLoopForPetriNet]: 30 programPoint places, 6 predicate places. [2024-11-22 13:45:09,459 INFO L471 AbstractCegarLoop]: Abstraction has has 36 places, 37 transitions, 146 flow [2024-11-22 13:45:09,459 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 6.0) internal successors, (48), 8 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-22 13:45:09,459 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-22 13:45:09,459 INFO L204 CegarLoopForPetriNet]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-22 13:45:09,470 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2024-11-22 13:45:09,664 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 13:45:09,665 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-22 13:45:09,665 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 13:45:09,665 INFO L85 PathProgramCache]: Analyzing trace with hash -1411407270, now seen corresponding path program 2 times [2024-11-22 13:45:09,666 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 13:45:09,666 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1710783496] [2024-11-22 13:45:09,666 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-22 13:45:09,666 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 13:45:09,741 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2024-11-22 13:45:09,741 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-22 13:45:10,722 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2024-11-22 13:45:10,722 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 13:45:10,723 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1710783496] [2024-11-22 13:45:10,723 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1710783496] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-22 13:45:10,723 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-22 13:45:10,723 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-22 13:45:10,723 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1543104310] [2024-11-22 13:45:10,723 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-22 13:45:10,724 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-22 13:45:10,725 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 13:45:10,726 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-22 13:45:10,726 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-22 13:45:10,727 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 34 [2024-11-22 13:45:10,727 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 36 places, 37 transitions, 146 flow. Second operand has 4 states, 4 states have (on average 7.5) internal successors, (30), 4 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-22 13:45:10,727 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-22 13:45:10,728 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 34 [2024-11-22 13:45:10,728 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-22 13:45:11,013 INFO L124 PetriNetUnfolderBase]: 249/435 cut-off events. [2024-11-22 13:45:11,014 INFO L125 PetriNetUnfolderBase]: For 4/4 co-relation queries the response was YES. [2024-11-22 13:45:11,015 INFO L83 FinitePrefix]: Finished finitePrefix Result has 919 conditions, 435 events. 249/435 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 31. Compared 1554 event pairs, 138 based on Foata normal form. 1/363 useless extension candidates. Maximal degree in co-relation 858. Up to 319 conditions per place. [2024-11-22 13:45:11,017 INFO L140 encePairwiseOnDemand]: 31/34 looper letters, 49 selfloop transitions, 1 changer transitions 6/57 dead transitions. [2024-11-22 13:45:11,018 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 39 places, 57 transitions, 303 flow [2024-11-22 13:45:11,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-22 13:45:11,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-22 13:45:11,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 61 transitions. [2024-11-22 13:45:11,019 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4485294117647059 [2024-11-22 13:45:11,019 INFO L175 Difference]: Start difference. First operand has 36 places, 37 transitions, 146 flow. Second operand 4 states and 61 transitions. [2024-11-22 13:45:11,020 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 39 places, 57 transitions, 303 flow [2024-11-22 13:45:11,022 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 38 places, 57 transitions, 287 flow, removed 6 selfloop flow, removed 1 redundant places. [2024-11-22 13:45:11,024 INFO L231 Difference]: Finished difference. Result has 40 places, 37 transitions, 137 flow [2024-11-22 13:45:11,025 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=130, PETRI_DIFFERENCE_MINUEND_PLACES=35, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=137, PETRI_PLACES=40, PETRI_TRANSITIONS=37} [2024-11-22 13:45:11,026 INFO L277 CegarLoopForPetriNet]: 30 programPoint places, 10 predicate places. [2024-11-22 13:45:11,026 INFO L471 AbstractCegarLoop]: Abstraction has has 40 places, 37 transitions, 137 flow [2024-11-22 13:45:11,026 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.5) internal successors, (30), 4 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-22 13:45:11,027 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-22 13:45:11,027 INFO L204 CegarLoopForPetriNet]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-22 13:45:11,027 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-11-22 13:45:11,027 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-22 13:45:11,028 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 13:45:11,028 INFO L85 PathProgramCache]: Analyzing trace with hash -1556262304, now seen corresponding path program 3 times [2024-11-22 13:45:11,028 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 13:45:11,028 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1339503129] [2024-11-22 13:45:11,029 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-22 13:45:11,029 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 13:45:11,062 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2024-11-22 13:45:11,063 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-22 13:45:11,745 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2024-11-22 13:45:11,745 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 13:45:11,745 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1339503129] [2024-11-22 13:45:11,745 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1339503129] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-22 13:45:11,746 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-22 13:45:11,746 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-22 13:45:11,746 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1575749123] [2024-11-22 13:45:11,746 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-22 13:45:11,746 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-22 13:45:11,747 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 13:45:11,747 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-22 13:45:11,748 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-22 13:45:11,749 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 34 [2024-11-22 13:45:11,749 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 40 places, 37 transitions, 137 flow. Second operand has 4 states, 4 states have (on average 7.5) internal successors, (30), 4 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-22 13:45:11,749 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-22 13:45:11,749 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 34 [2024-11-22 13:45:11,749 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-22 13:45:11,988 INFO L124 PetriNetUnfolderBase]: 277/496 cut-off events. [2024-11-22 13:45:11,989 INFO L125 PetriNetUnfolderBase]: For 79/79 co-relation queries the response was YES. [2024-11-22 13:45:11,991 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1073 conditions, 496 events. 277/496 cut-off events. For 79/79 co-relation queries the response was YES. Maximal size of possible extension queue 30. Compared 1780 event pairs, 186 based on Foata normal form. 1/456 useless extension candidates. Maximal degree in co-relation 1051. Up to 398 conditions per place. [2024-11-22 13:45:11,993 INFO L140 encePairwiseOnDemand]: 31/34 looper letters, 47 selfloop transitions, 1 changer transitions 6/55 dead transitions. [2024-11-22 13:45:11,993 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 42 places, 55 transitions, 290 flow [2024-11-22 13:45:11,993 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-22 13:45:11,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-22 13:45:11,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 59 transitions. [2024-11-22 13:45:11,994 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4338235294117647 [2024-11-22 13:45:11,994 INFO L175 Difference]: Start difference. First operand has 40 places, 37 transitions, 137 flow. Second operand 4 states and 59 transitions. [2024-11-22 13:45:11,995 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 42 places, 55 transitions, 290 flow [2024-11-22 13:45:11,996 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 40 places, 55 transitions, 284 flow, removed 2 selfloop flow, removed 2 redundant places. [2024-11-22 13:45:11,997 INFO L231 Difference]: Finished difference. Result has 42 places, 37 transitions, 141 flow [2024-11-22 13:45:11,998 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=134, PETRI_DIFFERENCE_MINUEND_PLACES=37, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=141, PETRI_PLACES=42, PETRI_TRANSITIONS=37} [2024-11-22 13:45:11,998 INFO L277 CegarLoopForPetriNet]: 30 programPoint places, 12 predicate places. [2024-11-22 13:45:11,999 INFO L471 AbstractCegarLoop]: Abstraction has has 42 places, 37 transitions, 141 flow [2024-11-22 13:45:11,999 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.5) internal successors, (30), 4 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-22 13:45:11,999 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-22 13:45:11,999 INFO L204 CegarLoopForPetriNet]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-22 13:45:11,999 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-11-22 13:45:12,000 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-22 13:45:12,000 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 13:45:12,000 INFO L85 PathProgramCache]: Analyzing trace with hash 1143191864, now seen corresponding path program 1 times [2024-11-22 13:45:12,000 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 13:45:12,000 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1050642360] [2024-11-22 13:45:12,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 13:45:12,001 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 13:45:12,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 13:45:12,095 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2024-11-22 13:45:12,096 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 13:45:12,096 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1050642360] [2024-11-22 13:45:12,096 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1050642360] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-22 13:45:12,097 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-22 13:45:12,097 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-22 13:45:12,097 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [399547934] [2024-11-22 13:45:12,097 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-22 13:45:12,097 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-22 13:45:12,098 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 13:45:12,098 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-22 13:45:12,098 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-22 13:45:12,099 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 34 [2024-11-22 13:45:12,099 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 37 transitions, 141 flow. Second operand has 3 states, 3 states have (on average 10.0) internal successors, (30), 3 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-22 13:45:12,099 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-22 13:45:12,099 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 34 [2024-11-22 13:45:12,099 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-22 13:45:12,280 INFO L124 PetriNetUnfolderBase]: 259/467 cut-off events. [2024-11-22 13:45:12,280 INFO L125 PetriNetUnfolderBase]: For 132/132 co-relation queries the response was YES. [2024-11-22 13:45:12,281 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1043 conditions, 467 events. 259/467 cut-off events. For 132/132 co-relation queries the response was YES. Maximal size of possible extension queue 26. Compared 1673 event pairs, 144 based on Foata normal form. 9/435 useless extension candidates. Maximal degree in co-relation 1020. Up to 304 conditions per place. [2024-11-22 13:45:12,283 INFO L140 encePairwiseOnDemand]: 30/34 looper letters, 48 selfloop transitions, 2 changer transitions 4/55 dead transitions. [2024-11-22 13:45:12,283 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 43 places, 55 transitions, 290 flow [2024-11-22 13:45:12,285 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-22 13:45:12,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-22 13:45:12,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 57 transitions. [2024-11-22 13:45:12,286 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5588235294117647 [2024-11-22 13:45:12,286 INFO L175 Difference]: Start difference. First operand has 42 places, 37 transitions, 141 flow. Second operand 3 states and 57 transitions. [2024-11-22 13:45:12,287 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 43 places, 55 transitions, 290 flow [2024-11-22 13:45:12,288 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 55 transitions, 285 flow, removed 2 selfloop flow, removed 2 redundant places. [2024-11-22 13:45:12,289 INFO L231 Difference]: Finished difference. Result has 42 places, 37 transitions, 148 flow [2024-11-22 13:45:12,291 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=138, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=148, PETRI_PLACES=42, PETRI_TRANSITIONS=37} [2024-11-22 13:45:12,294 INFO L277 CegarLoopForPetriNet]: 30 programPoint places, 12 predicate places. [2024-11-22 13:45:12,294 INFO L471 AbstractCegarLoop]: Abstraction has has 42 places, 37 transitions, 148 flow [2024-11-22 13:45:12,296 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 10.0) internal successors, (30), 3 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-22 13:45:12,296 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-22 13:45:12,297 INFO L204 CegarLoopForPetriNet]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-22 13:45:12,297 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-11-22 13:45:12,297 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-22 13:45:12,297 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 13:45:12,297 INFO L85 PathProgramCache]: Analyzing trace with hash 1877714524, now seen corresponding path program 1 times [2024-11-22 13:45:12,298 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 13:45:12,298 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1589261994] [2024-11-22 13:45:12,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 13:45:12,298 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 13:45:12,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 13:45:12,395 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2024-11-22 13:45:12,395 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 13:45:12,396 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1589261994] [2024-11-22 13:45:12,396 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1589261994] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-22 13:45:12,396 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-22 13:45:12,397 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-22 13:45:12,397 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1936016577] [2024-11-22 13:45:12,397 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-22 13:45:12,397 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-22 13:45:12,398 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 13:45:12,398 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-22 13:45:12,399 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-22 13:45:12,399 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 34 [2024-11-22 13:45:12,399 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 37 transitions, 148 flow. Second operand has 3 states, 3 states have (on average 10.0) internal successors, (30), 3 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-22 13:45:12,399 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-22 13:45:12,400 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 34 [2024-11-22 13:45:12,400 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-22 13:45:12,533 INFO L124 PetriNetUnfolderBase]: 192/347 cut-off events. [2024-11-22 13:45:12,534 INFO L125 PetriNetUnfolderBase]: For 312/312 co-relation queries the response was YES. [2024-11-22 13:45:12,535 INFO L83 FinitePrefix]: Finished finitePrefix Result has 801 conditions, 347 events. 192/347 cut-off events. For 312/312 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 1071 event pairs, 73 based on Foata normal form. 21/336 useless extension candidates. Maximal degree in co-relation 744. Up to 271 conditions per place. [2024-11-22 13:45:12,536 INFO L140 encePairwiseOnDemand]: 30/34 looper letters, 39 selfloop transitions, 2 changer transitions 5/47 dead transitions. [2024-11-22 13:45:12,537 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 47 transitions, 266 flow [2024-11-22 13:45:12,537 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-22 13:45:12,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-22 13:45:12,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 49 transitions. [2024-11-22 13:45:12,539 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4803921568627451 [2024-11-22 13:45:12,539 INFO L175 Difference]: Start difference. First operand has 42 places, 37 transitions, 148 flow. Second operand 3 states and 49 transitions. [2024-11-22 13:45:12,540 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 47 transitions, 266 flow [2024-11-22 13:45:12,541 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 47 transitions, 258 flow, removed 2 selfloop flow, removed 3 redundant places. [2024-11-22 13:45:12,543 INFO L231 Difference]: Finished difference. Result has 42 places, 37 transitions, 148 flow [2024-11-22 13:45:12,544 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=140, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=148, PETRI_PLACES=42, PETRI_TRANSITIONS=37} [2024-11-22 13:45:12,544 INFO L277 CegarLoopForPetriNet]: 30 programPoint places, 12 predicate places. [2024-11-22 13:45:12,545 INFO L471 AbstractCegarLoop]: Abstraction has has 42 places, 37 transitions, 148 flow [2024-11-22 13:45:12,545 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 10.0) internal successors, (30), 3 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-22 13:45:12,546 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-22 13:45:12,546 INFO L204 CegarLoopForPetriNet]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-22 13:45:12,546 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-11-22 13:45:12,547 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-22 13:45:12,547 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 13:45:12,549 INFO L85 PathProgramCache]: Analyzing trace with hash -1291654264, now seen corresponding path program 1 times [2024-11-22 13:45:12,549 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 13:45:12,549 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1451970558] [2024-11-22 13:45:12,550 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 13:45:12,550 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 13:45:12,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 13:45:12,727 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-11-22 13:45:12,728 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 13:45:12,729 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1451970558] [2024-11-22 13:45:12,729 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1451970558] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-22 13:45:12,729 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1104950042] [2024-11-22 13:45:12,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 13:45:12,729 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 13:45:12,729 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-22 13:45:12,732 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-22 13:45:12,734 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-22 13:45:12,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 13:45:12,909 INFO L255 TraceCheckSpWp]: Trace formula consists of 252 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-22 13:45:12,911 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-22 13:45:13,002 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-11-22 13:45:13,005 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-22 13:45:13,096 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-11-22 13:45:13,097 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1104950042] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-22 13:45:13,097 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-22 13:45:13,099 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 16 [2024-11-22 13:45:13,099 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1988793621] [2024-11-22 13:45:13,100 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-22 13:45:13,100 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-11-22 13:45:13,101 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 13:45:13,102 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-11-22 13:45:13,102 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=166, Unknown=0, NotChecked=0, Total=272 [2024-11-22 13:45:13,102 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 34 [2024-11-22 13:45:13,102 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 37 transitions, 148 flow. Second operand has 17 states, 17 states have (on average 5.294117647058823) internal successors, (90), 17 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-22 13:45:13,103 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-22 13:45:13,103 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 34 [2024-11-22 13:45:13,103 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-22 13:45:13,305 INFO L124 PetriNetUnfolderBase]: 171/306 cut-off events. [2024-11-22 13:45:13,305 INFO L125 PetriNetUnfolderBase]: For 86/86 co-relation queries the response was YES. [2024-11-22 13:45:13,306 INFO L83 FinitePrefix]: Finished finitePrefix Result has 730 conditions, 306 events. 171/306 cut-off events. For 86/86 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 833 event pairs, 128 based on Foata normal form. 1/275 useless extension candidates. Maximal degree in co-relation 667. Up to 296 conditions per place. [2024-11-22 13:45:13,308 INFO L140 encePairwiseOnDemand]: 29/34 looper letters, 26 selfloop transitions, 12 changer transitions 0/39 dead transitions. [2024-11-22 13:45:13,308 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 39 transitions, 236 flow [2024-11-22 13:45:13,308 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-22 13:45:13,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-11-22 13:45:13,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 59 transitions. [2024-11-22 13:45:13,310 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.24789915966386555 [2024-11-22 13:45:13,310 INFO L175 Difference]: Start difference. First operand has 42 places, 37 transitions, 148 flow. Second operand 7 states and 59 transitions. [2024-11-22 13:45:13,310 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 39 transitions, 236 flow [2024-11-22 13:45:13,311 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 39 transitions, 228 flow, removed 4 selfloop flow, removed 1 redundant places. [2024-11-22 13:45:13,312 INFO L231 Difference]: Finished difference. Result has 45 places, 39 transitions, 186 flow [2024-11-22 13:45:13,313 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=140, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=186, PETRI_PLACES=45, PETRI_TRANSITIONS=39} [2024-11-22 13:45:13,313 INFO L277 CegarLoopForPetriNet]: 30 programPoint places, 15 predicate places. [2024-11-22 13:45:13,314 INFO L471 AbstractCegarLoop]: Abstraction has has 45 places, 39 transitions, 186 flow [2024-11-22 13:45:13,314 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 5.294117647058823) internal successors, (90), 17 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-22 13:45:13,314 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-22 13:45:13,314 INFO L204 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-22 13:45:13,324 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-11-22 13:45:13,515 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2024-11-22 13:45:13,516 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-22 13:45:13,516 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 13:45:13,516 INFO L85 PathProgramCache]: Analyzing trace with hash 1270998506, now seen corresponding path program 2 times [2024-11-22 13:45:13,516 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 13:45:13,516 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1802905991] [2024-11-22 13:45:13,516 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-22 13:45:13,516 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 13:45:13,544 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2024-11-22 13:45:13,545 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-22 13:45:13,627 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-11-22 13:45:13,627 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 13:45:13,627 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1802905991] [2024-11-22 13:45:13,628 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1802905991] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-22 13:45:13,628 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-22 13:45:13,628 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-22 13:45:13,628 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1744807070] [2024-11-22 13:45:13,628 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-22 13:45:13,629 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-22 13:45:13,629 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 13:45:13,629 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-22 13:45:13,629 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-22 13:45:13,630 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 34 [2024-11-22 13:45:13,630 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 39 transitions, 186 flow. Second operand has 3 states, 3 states have (on average 11.0) internal successors, (33), 3 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-22 13:45:13,630 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-22 13:45:13,630 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 34 [2024-11-22 13:45:13,630 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-22 13:45:13,762 INFO L124 PetriNetUnfolderBase]: 240/423 cut-off events. [2024-11-22 13:45:13,762 INFO L125 PetriNetUnfolderBase]: For 33/33 co-relation queries the response was YES. [2024-11-22 13:45:13,763 INFO L83 FinitePrefix]: Finished finitePrefix Result has 960 conditions, 423 events. 240/423 cut-off events. For 33/33 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 1311 event pairs, 139 based on Foata normal form. 16/386 useless extension candidates. Maximal degree in co-relation 885. Up to 306 conditions per place. [2024-11-22 13:45:13,765 INFO L140 encePairwiseOnDemand]: 31/34 looper letters, 47 selfloop transitions, 3 changer transitions 1/52 dead transitions. [2024-11-22 13:45:13,765 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 52 transitions, 317 flow [2024-11-22 13:45:13,766 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-22 13:45:13,766 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-22 13:45:13,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 49 transitions. [2024-11-22 13:45:13,766 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4803921568627451 [2024-11-22 13:45:13,767 INFO L175 Difference]: Start difference. First operand has 45 places, 39 transitions, 186 flow. Second operand 3 states and 49 transitions. [2024-11-22 13:45:13,767 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 52 transitions, 317 flow [2024-11-22 13:45:13,768 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 43 places, 52 transitions, 293 flow, removed 4 selfloop flow, removed 4 redundant places. [2024-11-22 13:45:13,769 INFO L231 Difference]: Finished difference. Result has 44 places, 40 transitions, 177 flow [2024-11-22 13:45:13,769 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=162, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=177, PETRI_PLACES=44, PETRI_TRANSITIONS=40} [2024-11-22 13:45:13,770 INFO L277 CegarLoopForPetriNet]: 30 programPoint places, 14 predicate places. [2024-11-22 13:45:13,770 INFO L471 AbstractCegarLoop]: Abstraction has has 44 places, 40 transitions, 177 flow [2024-11-22 13:45:13,770 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 11.0) internal successors, (33), 3 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-22 13:45:13,770 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-22 13:45:13,771 INFO L204 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-22 13:45:13,771 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-11-22 13:45:13,771 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-22 13:45:13,771 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 13:45:13,771 INFO L85 PathProgramCache]: Analyzing trace with hash 1017083656, now seen corresponding path program 1 times [2024-11-22 13:45:13,772 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 13:45:13,772 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1117562881] [2024-11-22 13:45:13,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 13:45:13,772 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 13:45:13,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 13:45:13,968 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2024-11-22 13:45:13,969 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 13:45:13,969 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1117562881] [2024-11-22 13:45:13,969 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1117562881] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-22 13:45:13,969 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-22 13:45:13,969 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-22 13:45:13,970 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [432260101] [2024-11-22 13:45:13,970 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-22 13:45:13,970 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-22 13:45:13,970 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 13:45:13,971 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-22 13:45:13,971 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-22 13:45:13,971 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 34 [2024-11-22 13:45:13,971 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 40 transitions, 177 flow. Second operand has 3 states, 3 states have (on average 11.666666666666666) internal successors, (35), 3 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-22 13:45:13,971 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-22 13:45:13,972 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 34 [2024-11-22 13:45:13,972 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-22 13:45:14,125 INFO L124 PetriNetUnfolderBase]: 333/579 cut-off events. [2024-11-22 13:45:14,125 INFO L125 PetriNetUnfolderBase]: For 206/206 co-relation queries the response was YES. [2024-11-22 13:45:14,127 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1378 conditions, 579 events. 333/579 cut-off events. For 206/206 co-relation queries the response was YES. Maximal size of possible extension queue 26. Compared 1973 event pairs, 191 based on Foata normal form. 21/558 useless extension candidates. Maximal degree in co-relation 1313. Up to 423 conditions per place. [2024-11-22 13:45:14,130 INFO L140 encePairwiseOnDemand]: 31/34 looper letters, 48 selfloop transitions, 3 changer transitions 1/53 dead transitions. [2024-11-22 13:45:14,130 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 53 transitions, 320 flow [2024-11-22 13:45:14,130 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-22 13:45:14,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-22 13:45:14,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 48 transitions. [2024-11-22 13:45:14,131 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.47058823529411764 [2024-11-22 13:45:14,131 INFO L175 Difference]: Start difference. First operand has 44 places, 40 transitions, 177 flow. Second operand 3 states and 48 transitions. [2024-11-22 13:45:14,131 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 53 transitions, 320 flow [2024-11-22 13:45:14,132 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 53 transitions, 315 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-22 13:45:14,133 INFO L231 Difference]: Finished difference. Result has 46 places, 41 transitions, 189 flow [2024-11-22 13:45:14,133 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=174, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=189, PETRI_PLACES=46, PETRI_TRANSITIONS=41} [2024-11-22 13:45:14,133 INFO L277 CegarLoopForPetriNet]: 30 programPoint places, 16 predicate places. [2024-11-22 13:45:14,133 INFO L471 AbstractCegarLoop]: Abstraction has has 46 places, 41 transitions, 189 flow [2024-11-22 13:45:14,134 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 11.666666666666666) internal successors, (35), 3 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-22 13:45:14,134 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-22 13:45:14,134 INFO L204 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-22 13:45:14,134 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-11-22 13:45:14,138 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-22 13:45:14,138 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 13:45:14,138 INFO L85 PathProgramCache]: Analyzing trace with hash 1297553171, now seen corresponding path program 1 times [2024-11-22 13:45:14,139 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 13:45:14,139 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2031357076] [2024-11-22 13:45:14,139 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 13:45:14,140 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 13:45:14,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 13:45:23,295 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 3 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-22 13:45:23,296 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 13:45:23,296 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2031357076] [2024-11-22 13:45:23,296 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2031357076] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-22 13:45:23,296 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1418646266] [2024-11-22 13:45:23,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 13:45:23,297 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 13:45:23,297 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-22 13:45:23,299 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-22 13:45:23,301 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-22 13:45:23,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 13:45:23,503 INFO L255 TraceCheckSpWp]: Trace formula consists of 310 conjuncts, 69 conjuncts are in the unsatisfiable core [2024-11-22 13:45:23,514 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-22 13:45:23,577 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 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 43 treesize of output 30 [2024-11-22 13:45:23,583 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 8 treesize of output 7 [2024-11-22 13:45:23,591 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 8 treesize of output 7 [2024-11-22 13:45:23,650 INFO L349 Elim1Store]: treesize reduction 23, result has 23.3 percent of original size [2024-11-22 13:45:23,651 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 15 [2024-11-22 13:45:23,703 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 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 62 treesize of output 46 [2024-11-22 13:45:23,720 INFO L349 Elim1Store]: treesize reduction 34, result has 12.8 percent of original size [2024-11-22 13:45:23,721 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 46 treesize of output 63 [2024-11-22 13:45:23,769 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-22 13:45:23,772 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 27 [2024-11-22 13:45:23,927 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 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 114 treesize of output 90 [2024-11-22 13:45:23,994 INFO L349 Elim1Store]: treesize reduction 127, result has 18.1 percent of original size [2024-11-22 13:45:23,995 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 9 case distinctions, treesize of input 90 treesize of output 117 [2024-11-22 13:45:24,170 INFO L349 Elim1Store]: treesize reduction 76, result has 39.7 percent of original size [2024-11-22 13:45:24,171 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 9 case distinctions, treesize of input 73 treesize of output 101 [2024-11-22 13:45:26,081 INFO L349 Elim1Store]: treesize reduction 330, result has 64.2 percent of original size [2024-11-22 13:45:26,082 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 12 select indices, 12 select index equivalence classes, 0 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 78 case distinctions, treesize of input 265 treesize of output 730