./Ultimate.py --spec /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/properties/unreach-call.prp --file /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/popl20-more-nonblocking-counter-alt2.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version a046e57d Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/popl20-more-nonblocking-counter-alt2.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 87e1a1d3acb3ee9b7a4a97eb7b14df31d5b38b7566b1218cea0dabfe5ec8ddbd --- Real Ultimate output --- This is Ultimate 0.2.5-tmp.dk.eval-mul-div-a046e57-m [2024-10-13 07:13:57,687 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-10-13 07:13:57,755 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-10-13 07:13:57,759 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-10-13 07:13:57,760 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-10-13 07:13:57,803 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-10-13 07:13:57,804 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-10-13 07:13:57,805 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-10-13 07:13:57,806 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-10-13 07:13:57,808 INFO L153 SettingsManager]: * Use memory slicer=true [2024-10-13 07:13:57,808 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-10-13 07:13:57,809 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-10-13 07:13:57,809 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-10-13 07:13:57,810 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-10-13 07:13:57,810 INFO L153 SettingsManager]: * Use SBE=true [2024-10-13 07:13:57,810 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-10-13 07:13:57,814 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-10-13 07:13:57,814 INFO L153 SettingsManager]: * sizeof long=4 [2024-10-13 07:13:57,815 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-10-13 07:13:57,815 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-10-13 07:13:57,815 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-10-13 07:13:57,816 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-10-13 07:13:57,816 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-10-13 07:13:57,816 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-10-13 07:13:57,817 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-10-13 07:13:57,817 INFO L153 SettingsManager]: * sizeof long double=12 [2024-10-13 07:13:57,817 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-10-13 07:13:57,818 INFO L153 SettingsManager]: * Use constant arrays=true [2024-10-13 07:13:57,818 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-10-13 07:13:57,818 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-10-13 07:13:57,818 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-10-13 07:13:57,819 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-10-13 07:13:57,819 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-13 07:13:57,822 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-10-13 07:13:57,829 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-10-13 07:13:57,830 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-10-13 07:13:57,830 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-10-13 07:13:57,830 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-10-13 07:13:57,830 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-10-13 07:13:57,831 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-10-13 07:13:57,831 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-10-13 07:13:57,832 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-10-13 07:13:57,832 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 87e1a1d3acb3ee9b7a4a97eb7b14df31d5b38b7566b1218cea0dabfe5ec8ddbd [2024-10-13 07:13:58,104 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-10-13 07:13:58,130 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-10-13 07:13:58,134 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-10-13 07:13:58,135 INFO L270 PluginConnector]: Initializing CDTParser... [2024-10-13 07:13:58,136 INFO L274 PluginConnector]: CDTParser initialized [2024-10-13 07:13:58,137 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/popl20-more-nonblocking-counter-alt2.wvr.c [2024-10-13 07:13:59,617 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-10-13 07:13:59,808 INFO L384 CDTParser]: Found 1 translation units. [2024-10-13 07:13:59,809 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/popl20-more-nonblocking-counter-alt2.wvr.c [2024-10-13 07:13:59,817 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/60ea8ebde/1dfb58f143ee405dbc9379a807d232aa/FLAGc39b59294 [2024-10-13 07:13:59,832 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/60ea8ebde/1dfb58f143ee405dbc9379a807d232aa [2024-10-13 07:13:59,835 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-10-13 07:13:59,836 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-10-13 07:13:59,837 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-10-13 07:13:59,838 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-10-13 07:13:59,843 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-10-13 07:13:59,844 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 07:13:59" (1/1) ... [2024-10-13 07:13:59,845 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@330ddba2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:13:59, skipping insertion in model container [2024-10-13 07:13:59,845 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 07:13:59" (1/1) ... [2024-10-13 07:13:59,865 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-10-13 07:14:00,071 WARN L248 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/popl20-more-nonblocking-counter-alt2.wvr.c[2173,2186] [2024-10-13 07:14:00,076 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-13 07:14:00,084 INFO L200 MainTranslator]: Completed pre-run [2024-10-13 07:14:00,103 WARN L248 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/popl20-more-nonblocking-counter-alt2.wvr.c[2173,2186] [2024-10-13 07:14:00,104 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-13 07:14:00,119 INFO L204 MainTranslator]: Completed translation [2024-10-13 07:14:00,119 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:14:00 WrapperNode [2024-10-13 07:14:00,119 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-10-13 07:14:00,121 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-10-13 07:14:00,122 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-10-13 07:14:00,122 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-10-13 07:14:00,128 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:14:00" (1/1) ... [2024-10-13 07:14:00,133 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:14:00" (1/1) ... [2024-10-13 07:14:00,149 INFO L138 Inliner]: procedures = 20, calls = 14, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 44 [2024-10-13 07:14:00,150 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-10-13 07:14:00,151 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-10-13 07:14:00,151 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-10-13 07:14:00,151 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-10-13 07:14:00,158 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:14:00" (1/1) ... [2024-10-13 07:14:00,159 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:14:00" (1/1) ... [2024-10-13 07:14:00,160 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:14:00" (1/1) ... [2024-10-13 07:14:00,174 INFO L175 MemorySlicer]: Split 2 memory accesses to 1 slices as follows [2]. 100 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2]. The 0 writes are split as follows [0]. [2024-10-13 07:14:00,174 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:14:00" (1/1) ... [2024-10-13 07:14:00,175 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:14:00" (1/1) ... [2024-10-13 07:14:00,178 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:14:00" (1/1) ... [2024-10-13 07:14:00,182 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:14:00" (1/1) ... [2024-10-13 07:14:00,183 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:14:00" (1/1) ... [2024-10-13 07:14:00,184 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:14:00" (1/1) ... [2024-10-13 07:14:00,187 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-10-13 07:14:00,188 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-10-13 07:14:00,190 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-10-13 07:14:00,190 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-10-13 07:14:00,192 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:14:00" (1/1) ... [2024-10-13 07:14:00,198 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-13 07:14:00,221 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-13 07:14:00,242 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-10-13 07:14:00,251 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-10-13 07:14:00,300 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-10-13 07:14:00,300 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2024-10-13 07:14:00,301 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2024-10-13 07:14:00,301 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2024-10-13 07:14:00,301 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2024-10-13 07:14:00,301 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-10-13 07:14:00,301 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-10-13 07:14:00,301 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-10-13 07:14:00,303 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-10-13 07:14:00,303 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-10-13 07:14:00,305 WARN L207 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2024-10-13 07:14:00,405 INFO L238 CfgBuilder]: Building ICFG [2024-10-13 07:14:00,408 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-10-13 07:14:00,600 INFO L283 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2024-10-13 07:14:00,600 INFO L287 CfgBuilder]: Performing block encoding [2024-10-13 07:14:00,717 INFO L309 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-10-13 07:14:00,718 INFO L314 CfgBuilder]: Removed 2 assume(true) statements. [2024-10-13 07:14:00,719 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 07:14:00 BoogieIcfgContainer [2024-10-13 07:14:00,719 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-10-13 07:14:00,721 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-10-13 07:14:00,721 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-10-13 07:14:00,724 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-10-13 07:14:00,724 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 07:13:59" (1/3) ... [2024-10-13 07:14:00,725 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2fbcef64 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 07:14:00, skipping insertion in model container [2024-10-13 07:14:00,725 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:14:00" (2/3) ... [2024-10-13 07:14:00,725 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2fbcef64 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 07:14:00, skipping insertion in model container [2024-10-13 07:14:00,725 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 07:14:00" (3/3) ... [2024-10-13 07:14:00,727 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-more-nonblocking-counter-alt2.wvr.c [2024-10-13 07:14:00,741 INFO L209 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-10-13 07:14:00,741 INFO L149 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-10-13 07:14:00,741 INFO L484 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-10-13 07:14:00,785 INFO L143 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2024-10-13 07:14:00,825 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 26 places, 21 transitions, 56 flow [2024-10-13 07:14:00,847 INFO L124 PetriNetUnfolderBase]: 2/19 cut-off events. [2024-10-13 07:14:00,847 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-10-13 07:14:00,850 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28 conditions, 19 events. 2/19 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 19 event pairs, 0 based on Foata normal form. 0/16 useless extension candidates. Maximal degree in co-relation 14. Up to 2 conditions per place. [2024-10-13 07:14:00,850 INFO L82 GeneralOperation]: Start removeDead. Operand has 26 places, 21 transitions, 56 flow [2024-10-13 07:14:00,856 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 23 places, 18 transitions, 48 flow [2024-10-13 07:14:00,868 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-10-13 07:14:00,876 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;@57d7d4de, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-10-13 07:14:00,876 INFO L334 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2024-10-13 07:14:00,885 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-10-13 07:14:00,885 INFO L124 PetriNetUnfolderBase]: 2/17 cut-off events. [2024-10-13 07:14:00,885 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-10-13 07:14:00,886 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-13 07:14:00,890 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-13 07:14:00,891 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-13 07:14:00,895 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 07:14:00,896 INFO L85 PathProgramCache]: Analyzing trace with hash 1426367925, now seen corresponding path program 1 times [2024-10-13 07:14:00,903 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 07:14:00,903 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [462858223] [2024-10-13 07:14:00,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 07:14:00,904 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 07:14:01,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 07:14:01,363 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 07:14:01,364 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 07:14:01,364 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [462858223] [2024-10-13 07:14:01,365 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [462858223] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-13 07:14:01,365 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-13 07:14:01,365 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-10-13 07:14:01,367 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [905545565] [2024-10-13 07:14:01,368 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-13 07:14:01,377 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-13 07:14:01,383 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 07:14:01,409 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-13 07:14:01,410 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-13 07:14:01,415 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 21 [2024-10-13 07:14:01,418 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 23 places, 18 transitions, 48 flow. Second operand has 3 states, 3 states have (on average 9.0) internal successors, (27), 3 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 07:14:01,419 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-13 07:14:01,419 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 21 [2024-10-13 07:14:01,420 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-13 07:14:01,523 INFO L124 PetriNetUnfolderBase]: 73/144 cut-off events. [2024-10-13 07:14:01,523 INFO L125 PetriNetUnfolderBase]: For 14/14 co-relation queries the response was YES. [2024-10-13 07:14:01,526 INFO L83 FinitePrefix]: Finished finitePrefix Result has 301 conditions, 144 events. 73/144 cut-off events. For 14/14 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 410 event pairs, 22 based on Foata normal form. 1/141 useless extension candidates. Maximal degree in co-relation 252. Up to 74 conditions per place. [2024-10-13 07:14:01,530 INFO L140 encePairwiseOnDemand]: 18/21 looper letters, 20 selfloop transitions, 2 changer transitions 3/28 dead transitions. [2024-10-13 07:14:01,531 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 25 places, 28 transitions, 127 flow [2024-10-13 07:14:01,533 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-13 07:14:01,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-10-13 07:14:01,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 41 transitions. [2024-10-13 07:14:01,548 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6507936507936508 [2024-10-13 07:14:01,550 INFO L175 Difference]: Start difference. First operand has 23 places, 18 transitions, 48 flow. Second operand 3 states and 41 transitions. [2024-10-13 07:14:01,551 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 25 places, 28 transitions, 127 flow [2024-10-13 07:14:01,555 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 21 places, 28 transitions, 113 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-10-13 07:14:01,558 INFO L231 Difference]: Finished difference. Result has 22 places, 19 transitions, 52 flow [2024-10-13 07:14:01,560 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=40, PETRI_DIFFERENCE_MINUEND_PLACES=19, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=18, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=16, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=52, PETRI_PLACES=22, PETRI_TRANSITIONS=19} [2024-10-13 07:14:01,567 INFO L277 CegarLoopForPetriNet]: 23 programPoint places, -1 predicate places. [2024-10-13 07:14:01,568 INFO L471 AbstractCegarLoop]: Abstraction has has 22 places, 19 transitions, 52 flow [2024-10-13 07:14:01,568 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 9.0) internal successors, (27), 3 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 07:14:01,568 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-13 07:14:01,568 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-13 07:14:01,569 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-10-13 07:14:01,569 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-13 07:14:01,570 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 07:14:01,570 INFO L85 PathProgramCache]: Analyzing trace with hash 2133826849, now seen corresponding path program 1 times [2024-10-13 07:14:01,570 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 07:14:01,571 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1499275404] [2024-10-13 07:14:01,571 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 07:14:01,571 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 07:14:01,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 07:14:01,774 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-13 07:14:01,775 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 07:14:01,776 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1499275404] [2024-10-13 07:14:01,776 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1499275404] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-13 07:14:01,776 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-13 07:14:01,777 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-10-13 07:14:01,777 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1019114212] [2024-10-13 07:14:01,777 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-13 07:14:01,778 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-10-13 07:14:01,780 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 07:14:01,780 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-10-13 07:14:01,780 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-10-13 07:14:01,785 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 21 [2024-10-13 07:14:01,785 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 22 places, 19 transitions, 52 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) [2024-10-13 07:14:01,786 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-13 07:14:01,786 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 21 [2024-10-13 07:14:01,786 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-13 07:14:01,909 INFO L124 PetriNetUnfolderBase]: 141/258 cut-off events. [2024-10-13 07:14:01,910 INFO L125 PetriNetUnfolderBase]: For 8/8 co-relation queries the response was YES. [2024-10-13 07:14:01,911 INFO L83 FinitePrefix]: Finished finitePrefix Result has 531 conditions, 258 events. 141/258 cut-off events. For 8/8 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 889 event pairs, 81 based on Foata normal form. 0/213 useless extension candidates. Maximal degree in co-relation 277. Up to 179 conditions per place. [2024-10-13 07:14:01,914 INFO L140 encePairwiseOnDemand]: 17/21 looper letters, 21 selfloop transitions, 3 changer transitions 0/27 dead transitions. [2024-10-13 07:14:01,914 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 25 places, 27 transitions, 117 flow [2024-10-13 07:14:01,915 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-10-13 07:14:01,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-10-13 07:14:01,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 41 transitions. [2024-10-13 07:14:01,917 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4880952380952381 [2024-10-13 07:14:01,917 INFO L175 Difference]: Start difference. First operand has 22 places, 19 transitions, 52 flow. Second operand 4 states and 41 transitions. [2024-10-13 07:14:01,917 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 25 places, 27 transitions, 117 flow [2024-10-13 07:14:01,918 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 24 places, 27 transitions, 115 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-10-13 07:14:01,919 INFO L231 Difference]: Finished difference. Result has 25 places, 20 transitions, 64 flow [2024-10-13 07:14:01,920 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=50, PETRI_DIFFERENCE_MINUEND_PLACES=21, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=19, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=16, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=64, PETRI_PLACES=25, PETRI_TRANSITIONS=20} [2024-10-13 07:14:01,921 INFO L277 CegarLoopForPetriNet]: 23 programPoint places, 2 predicate places. [2024-10-13 07:14:01,921 INFO L471 AbstractCegarLoop]: Abstraction has has 25 places, 20 transitions, 64 flow [2024-10-13 07:14:01,921 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) [2024-10-13 07:14:01,922 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-13 07:14:01,922 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-13 07:14:01,922 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-10-13 07:14:01,922 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-13 07:14:01,923 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 07:14:01,923 INFO L85 PathProgramCache]: Analyzing trace with hash -1055225553, now seen corresponding path program 1 times [2024-10-13 07:14:01,923 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 07:14:01,923 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [70402355] [2024-10-13 07:14:01,923 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 07:14:01,923 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 07:14:01,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 07:14:02,344 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 07:14:02,344 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 07:14:02,344 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [70402355] [2024-10-13 07:14:02,344 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [70402355] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-13 07:14:02,344 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1875123065] [2024-10-13 07:14:02,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 07:14:02,345 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 07:14:02,345 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-13 07:14:02,347 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-13 07:14:02,349 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-10-13 07:14:02,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 07:14:02,421 INFO L255 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-10-13 07:14:02,426 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-13 07:14:02,731 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 07:14:02,732 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-13 07:14:03,087 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 07:14:03,088 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1875123065] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-13 07:14:03,088 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-13 07:14:03,088 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 9, 7] total 19 [2024-10-13 07:14:03,089 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1579333764] [2024-10-13 07:14:03,089 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-13 07:14:03,089 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-10-13 07:14:03,090 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 07:14:03,090 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-10-13 07:14:03,091 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=266, Unknown=0, NotChecked=0, Total=380 [2024-10-13 07:14:03,109 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 21 [2024-10-13 07:14:03,110 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 25 places, 20 transitions, 64 flow. Second operand has 20 states, 20 states have (on average 5.3) internal successors, (106), 20 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 07:14:03,110 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-13 07:14:03,110 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 21 [2024-10-13 07:14:03,110 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-13 07:14:03,831 INFO L124 PetriNetUnfolderBase]: 402/697 cut-off events. [2024-10-13 07:14:03,832 INFO L125 PetriNetUnfolderBase]: For 187/187 co-relation queries the response was YES. [2024-10-13 07:14:03,834 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1691 conditions, 697 events. 402/697 cut-off events. For 187/187 co-relation queries the response was YES. Maximal size of possible extension queue 46. Compared 2923 event pairs, 5 based on Foata normal form. 2/645 useless extension candidates. Maximal degree in co-relation 598. Up to 148 conditions per place. [2024-10-13 07:14:03,838 INFO L140 encePairwiseOnDemand]: 11/21 looper letters, 90 selfloop transitions, 28 changer transitions 19/138 dead transitions. [2024-10-13 07:14:03,838 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 41 places, 138 transitions, 696 flow [2024-10-13 07:14:03,839 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-10-13 07:14:03,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2024-10-13 07:14:03,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 184 transitions. [2024-10-13 07:14:03,842 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5154061624649859 [2024-10-13 07:14:03,842 INFO L175 Difference]: Start difference. First operand has 25 places, 20 transitions, 64 flow. Second operand 17 states and 184 transitions. [2024-10-13 07:14:03,842 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 41 places, 138 transitions, 696 flow [2024-10-13 07:14:03,845 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 39 places, 138 transitions, 669 flow, removed 3 selfloop flow, removed 2 redundant places. [2024-10-13 07:14:03,846 INFO L231 Difference]: Finished difference. Result has 51 places, 47 transitions, 302 flow [2024-10-13 07:14:03,847 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=58, PETRI_DIFFERENCE_MINUEND_PLACES=23, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=20, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=9, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=302, PETRI_PLACES=51, PETRI_TRANSITIONS=47} [2024-10-13 07:14:03,849 INFO L277 CegarLoopForPetriNet]: 23 programPoint places, 28 predicate places. [2024-10-13 07:14:03,849 INFO L471 AbstractCegarLoop]: Abstraction has has 51 places, 47 transitions, 302 flow [2024-10-13 07:14:03,850 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 5.3) internal successors, (106), 20 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 07:14:03,850 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-13 07:14:03,850 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-13 07:14:03,869 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2024-10-13 07:14:04,054 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 07:14:04,055 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-13 07:14:04,056 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 07:14:04,056 INFO L85 PathProgramCache]: Analyzing trace with hash -584159275, now seen corresponding path program 2 times [2024-10-13 07:14:04,056 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 07:14:04,056 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [962260405] [2024-10-13 07:14:04,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 07:14:04,056 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 07:14:04,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 07:14:04,195 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-13 07:14:04,195 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 07:14:04,196 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [962260405] [2024-10-13 07:14:04,196 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [962260405] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-13 07:14:04,196 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1317951440] [2024-10-13 07:14:04,196 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-13 07:14:04,196 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 07:14:04,196 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-13 07:14:04,199 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-13 07:14:04,200 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-10-13 07:14:04,253 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-13 07:14:04,253 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-13 07:14:04,254 INFO L255 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 11 conjuncts are in the unsatisfiable core [2024-10-13 07:14:04,255 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-13 07:14:04,311 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-13 07:14:04,311 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-13 07:14:04,471 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-13 07:14:04,471 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1317951440] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-13 07:14:04,472 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-13 07:14:04,472 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5, 5] total 10 [2024-10-13 07:14:04,472 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [853998163] [2024-10-13 07:14:04,472 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-13 07:14:04,473 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-10-13 07:14:04,473 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 07:14:04,473 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-10-13 07:14:04,474 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=73, Unknown=0, NotChecked=0, Total=110 [2024-10-13 07:14:04,486 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 21 [2024-10-13 07:14:04,487 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 47 transitions, 302 flow. Second operand has 11 states, 11 states have (on average 6.0) internal successors, (66), 11 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 07:14:04,487 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-13 07:14:04,487 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 21 [2024-10-13 07:14:04,487 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-13 07:14:04,674 INFO L124 PetriNetUnfolderBase]: 415/722 cut-off events. [2024-10-13 07:14:04,674 INFO L125 PetriNetUnfolderBase]: For 1496/1496 co-relation queries the response was YES. [2024-10-13 07:14:04,679 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2622 conditions, 722 events. 415/722 cut-off events. For 1496/1496 co-relation queries the response was YES. Maximal size of possible extension queue 49. Compared 3042 event pairs, 39 based on Foata normal form. 24/746 useless extension candidates. Maximal degree in co-relation 2455. Up to 349 conditions per place. [2024-10-13 07:14:04,683 INFO L140 encePairwiseOnDemand]: 15/21 looper letters, 63 selfloop transitions, 20 changer transitions 2/86 dead transitions. [2024-10-13 07:14:04,684 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 86 transitions, 700 flow [2024-10-13 07:14:04,684 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-10-13 07:14:04,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-10-13 07:14:04,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 63 transitions. [2024-10-13 07:14:04,686 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5 [2024-10-13 07:14:04,686 INFO L175 Difference]: Start difference. First operand has 51 places, 47 transitions, 302 flow. Second operand 6 states and 63 transitions. [2024-10-13 07:14:04,686 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 86 transitions, 700 flow [2024-10-13 07:14:04,701 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 86 transitions, 662 flow, removed 16 selfloop flow, removed 2 redundant places. [2024-10-13 07:14:04,703 INFO L231 Difference]: Finished difference. Result has 57 places, 53 transitions, 411 flow [2024-10-13 07:14:04,703 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=282, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=411, PETRI_PLACES=57, PETRI_TRANSITIONS=53} [2024-10-13 07:14:04,705 INFO L277 CegarLoopForPetriNet]: 23 programPoint places, 34 predicate places. [2024-10-13 07:14:04,706 INFO L471 AbstractCegarLoop]: Abstraction has has 57 places, 53 transitions, 411 flow [2024-10-13 07:14:04,706 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 6.0) internal successors, (66), 11 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 07:14:04,706 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-13 07:14:04,706 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-13 07:14:04,725 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-10-13 07:14:04,907 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,SelfDestructingSolverStorable3 [2024-10-13 07:14:04,908 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-13 07:14:04,908 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 07:14:04,908 INFO L85 PathProgramCache]: Analyzing trace with hash 464964525, now seen corresponding path program 3 times [2024-10-13 07:14:04,908 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 07:14:04,908 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [581440596] [2024-10-13 07:14:04,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 07:14:04,908 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 07:14:04,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 07:14:05,184 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 07:14:05,184 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 07:14:05,185 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [581440596] [2024-10-13 07:14:05,185 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [581440596] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-13 07:14:05,185 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1204330255] [2024-10-13 07:14:05,185 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-10-13 07:14:05,186 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 07:14:05,186 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-13 07:14:05,188 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-13 07:14:05,189 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-10-13 07:14:05,245 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-10-13 07:14:05,246 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-13 07:14:05,247 INFO L255 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-10-13 07:14:05,250 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-13 07:14:05,357 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 07:14:05,358 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-13 07:14:05,535 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 07:14:05,535 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1204330255] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-13 07:14:05,535 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-13 07:14:05,535 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 8] total 15 [2024-10-13 07:14:05,535 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1344008130] [2024-10-13 07:14:05,536 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-13 07:14:05,537 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-10-13 07:14:05,538 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 07:14:05,538 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-10-13 07:14:05,538 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2024-10-13 07:14:05,551 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 21 [2024-10-13 07:14:05,552 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 53 transitions, 411 flow. Second operand has 15 states, 15 states have (on average 5.666666666666667) internal successors, (85), 15 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 07:14:05,552 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-13 07:14:05,552 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 21 [2024-10-13 07:14:05,552 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-13 07:14:06,471 INFO L124 PetriNetUnfolderBase]: 853/1423 cut-off events. [2024-10-13 07:14:06,471 INFO L125 PetriNetUnfolderBase]: For 5018/5018 co-relation queries the response was YES. [2024-10-13 07:14:06,477 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6045 conditions, 1423 events. 853/1423 cut-off events. For 5018/5018 co-relation queries the response was YES. Maximal size of possible extension queue 74. Compared 6541 event pairs, 6 based on Foata normal form. 33/1456 useless extension candidates. Maximal degree in co-relation 5849. Up to 324 conditions per place. [2024-10-13 07:14:06,486 INFO L140 encePairwiseOnDemand]: 11/21 looper letters, 135 selfloop transitions, 119 changer transitions 15/270 dead transitions. [2024-10-13 07:14:06,486 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 84 places, 270 transitions, 2546 flow [2024-10-13 07:14:06,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2024-10-13 07:14:06,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2024-10-13 07:14:06,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 262 transitions. [2024-10-13 07:14:06,490 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4302134646962233 [2024-10-13 07:14:06,491 INFO L175 Difference]: Start difference. First operand has 57 places, 53 transitions, 411 flow. Second operand 29 states and 262 transitions. [2024-10-13 07:14:06,491 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 84 places, 270 transitions, 2546 flow [2024-10-13 07:14:06,507 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 83 places, 270 transitions, 2444 flow, removed 51 selfloop flow, removed 1 redundant places. [2024-10-13 07:14:06,511 INFO L231 Difference]: Finished difference. Result has 104 places, 173 transitions, 1993 flow [2024-10-13 07:14:06,512 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=389, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=53, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=17, PETRI_DIFFERENCE_SUBTRAHEND_STATES=29, PETRI_FLOW=1993, PETRI_PLACES=104, PETRI_TRANSITIONS=173} [2024-10-13 07:14:06,512 INFO L277 CegarLoopForPetriNet]: 23 programPoint places, 81 predicate places. [2024-10-13 07:14:06,513 INFO L471 AbstractCegarLoop]: Abstraction has has 104 places, 173 transitions, 1993 flow [2024-10-13 07:14:06,513 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 5.666666666666667) internal successors, (85), 15 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 07:14:06,513 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-13 07:14:06,513 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-13 07:14:06,531 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-10-13 07:14:06,717 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 07:14:06,718 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-13 07:14:06,719 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 07:14:06,719 INFO L85 PathProgramCache]: Analyzing trace with hash -1088901193, now seen corresponding path program 4 times [2024-10-13 07:14:06,719 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 07:14:06,719 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [866759944] [2024-10-13 07:14:06,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 07:14:06,719 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 07:14:06,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 07:14:06,962 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 07:14:06,963 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 07:14:06,963 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [866759944] [2024-10-13 07:14:06,963 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [866759944] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-13 07:14:06,963 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1076652910] [2024-10-13 07:14:06,963 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-10-13 07:14:06,963 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 07:14:06,964 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-13 07:14:06,966 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-13 07:14:06,967 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-10-13 07:14:07,020 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-10-13 07:14:07,020 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-13 07:14:07,021 INFO L255 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-10-13 07:14:07,023 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-13 07:14:07,132 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 07:14:07,132 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-13 07:14:07,316 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 07:14:07,317 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1076652910] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-13 07:14:07,317 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-13 07:14:07,317 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 7] total 15 [2024-10-13 07:14:07,317 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [31211415] [2024-10-13 07:14:07,318 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-13 07:14:07,318 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-10-13 07:14:07,318 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 07:14:07,319 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-10-13 07:14:07,319 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=149, Unknown=0, NotChecked=0, Total=210 [2024-10-13 07:14:07,323 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 21 [2024-10-13 07:14:07,323 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 104 places, 173 transitions, 1993 flow. Second operand has 15 states, 15 states have (on average 6.333333333333333) internal successors, (95), 15 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 07:14:07,324 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-13 07:14:07,324 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 21 [2024-10-13 07:14:07,324 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-13 07:14:08,238 INFO L124 PetriNetUnfolderBase]: 1191/2038 cut-off events. [2024-10-13 07:14:08,239 INFO L125 PetriNetUnfolderBase]: For 18770/18780 co-relation queries the response was YES. [2024-10-13 07:14:08,249 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12218 conditions, 2038 events. 1191/2038 cut-off events. For 18770/18780 co-relation queries the response was YES. Maximal size of possible extension queue 115. Compared 10629 event pairs, 46 based on Foata normal form. 14/2050 useless extension candidates. Maximal degree in co-relation 11963. Up to 526 conditions per place. [2024-10-13 07:14:08,264 INFO L140 encePairwiseOnDemand]: 12/21 looper letters, 135 selfloop transitions, 204 changer transitions 0/360 dead transitions. [2024-10-13 07:14:08,265 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 123 places, 360 transitions, 4858 flow [2024-10-13 07:14:08,265 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2024-10-13 07:14:08,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2024-10-13 07:14:08,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 202 transitions. [2024-10-13 07:14:08,268 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4580498866213152 [2024-10-13 07:14:08,268 INFO L175 Difference]: Start difference. First operand has 104 places, 173 transitions, 1993 flow. Second operand 21 states and 202 transitions. [2024-10-13 07:14:08,268 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 123 places, 360 transitions, 4858 flow [2024-10-13 07:14:08,345 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 117 places, 360 transitions, 4376 flow, removed 229 selfloop flow, removed 6 redundant places. [2024-10-13 07:14:08,355 INFO L231 Difference]: Finished difference. Result has 133 places, 298 transitions, 4076 flow [2024-10-13 07:14:08,357 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=1764, PETRI_DIFFERENCE_MINUEND_PLACES=97, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=173, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=96, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=4076, PETRI_PLACES=133, PETRI_TRANSITIONS=298} [2024-10-13 07:14:08,358 INFO L277 CegarLoopForPetriNet]: 23 programPoint places, 110 predicate places. [2024-10-13 07:14:08,358 INFO L471 AbstractCegarLoop]: Abstraction has has 133 places, 298 transitions, 4076 flow [2024-10-13 07:14:08,359 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 6.333333333333333) internal successors, (95), 15 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 07:14:08,359 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-13 07:14:08,359 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-13 07:14:08,377 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-10-13 07:14:08,563 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 07:14:08,564 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-13 07:14:08,565 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 07:14:08,565 INFO L85 PathProgramCache]: Analyzing trace with hash 886965879, now seen corresponding path program 5 times [2024-10-13 07:14:08,565 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 07:14:08,565 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1371586235] [2024-10-13 07:14:08,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 07:14:08,565 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 07:14:08,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 07:14:08,809 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 07:14:08,810 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 07:14:08,810 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1371586235] [2024-10-13 07:14:08,810 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1371586235] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-13 07:14:08,810 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1595931899] [2024-10-13 07:14:08,810 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-10-13 07:14:08,811 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 07:14:08,811 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-13 07:14:08,813 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-13 07:14:08,814 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-10-13 07:14:08,859 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-13 07:14:08,859 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-13 07:14:08,860 INFO L255 TraceCheckSpWp]: Trace formula consists of 25 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-10-13 07:14:08,861 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-13 07:14:08,988 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 07:14:08,988 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-13 07:14:09,219 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 07:14:09,220 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1595931899] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-13 07:14:09,220 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-13 07:14:09,220 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 8] total 18 [2024-10-13 07:14:09,220 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1079876103] [2024-10-13 07:14:09,220 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-13 07:14:09,220 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-10-13 07:14:09,221 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 07:14:09,221 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-10-13 07:14:09,221 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=232, Unknown=0, NotChecked=0, Total=306 [2024-10-13 07:14:09,237 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 21 [2024-10-13 07:14:09,238 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 133 places, 298 transitions, 4076 flow. Second operand has 18 states, 18 states have (on average 5.833333333333333) internal successors, (105), 18 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 07:14:09,238 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-13 07:14:09,238 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 21 [2024-10-13 07:14:09,238 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-13 07:14:11,052 INFO L124 PetriNetUnfolderBase]: 1727/2982 cut-off events. [2024-10-13 07:14:11,052 INFO L125 PetriNetUnfolderBase]: For 38410/38444 co-relation queries the response was YES. [2024-10-13 07:14:11,068 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19335 conditions, 2982 events. 1727/2982 cut-off events. For 38410/38444 co-relation queries the response was YES. Maximal size of possible extension queue 160. Compared 16939 event pairs, 32 based on Foata normal form. 75/3049 useless extension candidates. Maximal degree in co-relation 18628. Up to 694 conditions per place. [2024-10-13 07:14:11,093 INFO L140 encePairwiseOnDemand]: 13/21 looper letters, 117 selfloop transitions, 527 changer transitions 2/667 dead transitions. [2024-10-13 07:14:11,093 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 162 places, 667 transitions, 10103 flow [2024-10-13 07:14:11,094 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2024-10-13 07:14:11,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2024-10-13 07:14:11,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 269 transitions. [2024-10-13 07:14:11,095 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.42698412698412697 [2024-10-13 07:14:11,095 INFO L175 Difference]: Start difference. First operand has 133 places, 298 transitions, 4076 flow. Second operand 30 states and 269 transitions. [2024-10-13 07:14:11,096 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 162 places, 667 transitions, 10103 flow [2024-10-13 07:14:11,361 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 160 places, 667 transitions, 9718 flow, removed 190 selfloop flow, removed 2 redundant places. [2024-10-13 07:14:11,372 INFO L231 Difference]: Finished difference. Result has 165 places, 580 transitions, 9179 flow [2024-10-13 07:14:11,373 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=3913, PETRI_DIFFERENCE_MINUEND_PLACES=131, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=298, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=249, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=30, PETRI_FLOW=9179, PETRI_PLACES=165, PETRI_TRANSITIONS=580} [2024-10-13 07:14:11,374 INFO L277 CegarLoopForPetriNet]: 23 programPoint places, 142 predicate places. [2024-10-13 07:14:11,374 INFO L471 AbstractCegarLoop]: Abstraction has has 165 places, 580 transitions, 9179 flow [2024-10-13 07:14:11,374 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 5.833333333333333) internal successors, (105), 18 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 07:14:11,374 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-13 07:14:11,374 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-13 07:14:11,387 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2024-10-13 07:14:11,575 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 07:14:11,576 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-13 07:14:11,576 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 07:14:11,576 INFO L85 PathProgramCache]: Analyzing trace with hash -388408205, now seen corresponding path program 6 times [2024-10-13 07:14:11,576 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 07:14:11,577 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2126412140] [2024-10-13 07:14:11,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 07:14:11,577 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 07:14:11,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 07:14:11,743 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 07:14:11,743 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 07:14:11,743 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2126412140] [2024-10-13 07:14:11,744 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2126412140] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-13 07:14:11,744 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2140827240] [2024-10-13 07:14:11,744 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-10-13 07:14:11,744 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 07:14:11,744 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-13 07:14:11,746 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-13 07:14:11,748 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-10-13 07:14:11,801 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2024-10-13 07:14:11,802 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-13 07:14:11,803 INFO L255 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-10-13 07:14:11,804 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-13 07:14:11,916 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 07:14:11,916 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-13 07:14:12,072 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 07:14:12,073 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2140827240] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-13 07:14:12,073 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-13 07:14:12,073 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 7] total 17 [2024-10-13 07:14:12,073 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [438533780] [2024-10-13 07:14:12,073 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-13 07:14:12,074 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-10-13 07:14:12,074 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 07:14:12,074 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-10-13 07:14:12,075 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=200, Unknown=0, NotChecked=0, Total=272 [2024-10-13 07:14:12,078 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 21 [2024-10-13 07:14:12,079 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 165 places, 580 transitions, 9179 flow. Second operand has 17 states, 17 states have (on average 5.9411764705882355) internal successors, (101), 17 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 07:14:12,079 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-13 07:14:12,079 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 21 [2024-10-13 07:14:12,079 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-13 07:14:13,544 INFO L124 PetriNetUnfolderBase]: 1985/3463 cut-off events. [2024-10-13 07:14:13,544 INFO L125 PetriNetUnfolderBase]: For 45224/45260 co-relation queries the response was YES. [2024-10-13 07:14:13,560 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24848 conditions, 3463 events. 1985/3463 cut-off events. For 45224/45260 co-relation queries the response was YES. Maximal size of possible extension queue 197. Compared 20630 event pairs, 46 based on Foata normal form. 54/3513 useless extension candidates. Maximal degree in co-relation 24116. Up to 790 conditions per place. [2024-10-13 07:14:13,586 INFO L140 encePairwiseOnDemand]: 13/21 looper letters, 185 selfloop transitions, 589 changer transitions 0/795 dead transitions. [2024-10-13 07:14:13,586 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 192 places, 795 transitions, 13743 flow [2024-10-13 07:14:13,587 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2024-10-13 07:14:13,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2024-10-13 07:14:13,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 290 transitions. [2024-10-13 07:14:13,589 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4603174603174603 [2024-10-13 07:14:13,589 INFO L175 Difference]: Start difference. First operand has 165 places, 580 transitions, 9179 flow. Second operand 30 states and 290 transitions. [2024-10-13 07:14:13,589 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 192 places, 795 transitions, 13743 flow [2024-10-13 07:14:13,828 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 188 places, 795 transitions, 12874 flow, removed 429 selfloop flow, removed 4 redundant places. [2024-10-13 07:14:13,839 INFO L231 Difference]: Finished difference. Result has 199 places, 726 transitions, 13062 flow [2024-10-13 07:14:13,840 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=8545, PETRI_DIFFERENCE_MINUEND_PLACES=159, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=573, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=449, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=84, PETRI_DIFFERENCE_SUBTRAHEND_STATES=30, PETRI_FLOW=13062, PETRI_PLACES=199, PETRI_TRANSITIONS=726} [2024-10-13 07:14:13,841 INFO L277 CegarLoopForPetriNet]: 23 programPoint places, 176 predicate places. [2024-10-13 07:14:13,841 INFO L471 AbstractCegarLoop]: Abstraction has has 199 places, 726 transitions, 13062 flow [2024-10-13 07:14:13,841 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 5.9411764705882355) internal successors, (101), 17 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 07:14:13,841 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-13 07:14:13,842 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-13 07:14:13,855 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2024-10-13 07:14:14,045 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 07:14:14,045 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-13 07:14:14,046 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 07:14:14,046 INFO L85 PathProgramCache]: Analyzing trace with hash 2110190859, now seen corresponding path program 7 times [2024-10-13 07:14:14,046 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 07:14:14,046 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1693139372] [2024-10-13 07:14:14,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 07:14:14,046 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 07:14:14,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 07:14:14,254 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 07:14:14,255 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 07:14:14,255 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1693139372] [2024-10-13 07:14:14,255 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1693139372] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-13 07:14:14,255 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [309708335] [2024-10-13 07:14:14,256 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-10-13 07:14:14,256 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 07:14:14,256 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-13 07:14:14,258 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-13 07:14:14,259 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-10-13 07:14:14,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 07:14:14,312 INFO L255 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-10-13 07:14:14,313 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-13 07:14:14,438 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 07:14:14,438 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-13 07:14:14,631 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 07:14:14,631 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [309708335] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-13 07:14:14,631 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-13 07:14:14,631 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 17 [2024-10-13 07:14:14,632 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1249812481] [2024-10-13 07:14:14,632 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-13 07:14:14,632 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-10-13 07:14:14,633 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 07:14:14,633 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-10-13 07:14:14,633 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=194, Unknown=0, NotChecked=0, Total=272 [2024-10-13 07:14:14,637 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 21 [2024-10-13 07:14:14,638 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 199 places, 726 transitions, 13062 flow. Second operand has 17 states, 17 states have (on average 6.176470588235294) internal successors, (105), 17 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 07:14:14,638 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-13 07:14:14,638 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 21 [2024-10-13 07:14:14,638 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-13 07:14:16,186 INFO L124 PetriNetUnfolderBase]: 2587/4523 cut-off events. [2024-10-13 07:14:16,186 INFO L125 PetriNetUnfolderBase]: For 60940/60964 co-relation queries the response was YES. [2024-10-13 07:14:16,210 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35492 conditions, 4523 events. 2587/4523 cut-off events. For 60940/60964 co-relation queries the response was YES. Maximal size of possible extension queue 257. Compared 28591 event pairs, 115 based on Foata normal form. 46/4569 useless extension candidates. Maximal degree in co-relation 34561. Up to 924 conditions per place. [2024-10-13 07:14:16,242 INFO L140 encePairwiseOnDemand]: 13/21 looper letters, 267 selfloop transitions, 763 changer transitions 2/1053 dead transitions. [2024-10-13 07:14:16,242 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 222 places, 1053 transitions, 20401 flow [2024-10-13 07:14:16,243 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2024-10-13 07:14:16,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2024-10-13 07:14:16,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 237 transitions. [2024-10-13 07:14:16,244 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.47023809523809523 [2024-10-13 07:14:16,244 INFO L175 Difference]: Start difference. First operand has 199 places, 726 transitions, 13062 flow. Second operand 24 states and 237 transitions. [2024-10-13 07:14:16,244 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 222 places, 1053 transitions, 20401 flow [2024-10-13 07:14:16,857 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 215 places, 1053 transitions, 19817 flow, removed 216 selfloop flow, removed 7 redundant places. [2024-10-13 07:14:16,877 INFO L231 Difference]: Finished difference. Result has 229 places, 963 transitions, 20009 flow [2024-10-13 07:14:16,878 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=12613, PETRI_DIFFERENCE_MINUEND_PLACES=192, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=726, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=544, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=113, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=20009, PETRI_PLACES=229, PETRI_TRANSITIONS=963} [2024-10-13 07:14:16,879 INFO L277 CegarLoopForPetriNet]: 23 programPoint places, 206 predicate places. [2024-10-13 07:14:16,879 INFO L471 AbstractCegarLoop]: Abstraction has has 229 places, 963 transitions, 20009 flow [2024-10-13 07:14:16,880 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 6.176470588235294) internal successors, (105), 17 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 07:14:16,880 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-13 07:14:16,880 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-13 07:14:16,893 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2024-10-13 07:14:17,080 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 07:14:17,081 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-13 07:14:17,081 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 07:14:17,081 INFO L85 PathProgramCache]: Analyzing trace with hash -1186924357, now seen corresponding path program 8 times [2024-10-13 07:14:17,081 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 07:14:17,082 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [423523778] [2024-10-13 07:14:17,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 07:14:17,082 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 07:14:17,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 07:14:17,289 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 07:14:17,289 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 07:14:17,289 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [423523778] [2024-10-13 07:14:17,289 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [423523778] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-13 07:14:17,290 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [306000402] [2024-10-13 07:14:17,290 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-13 07:14:17,290 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 07:14:17,290 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-13 07:14:17,292 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-13 07:14:17,293 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-10-13 07:14:17,346 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-13 07:14:17,346 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-13 07:14:17,348 INFO L255 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-10-13 07:14:17,349 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-13 07:14:17,415 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 07:14:17,415 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-13 07:14:17,563 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 07:14:17,564 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [306000402] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-13 07:14:17,564 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-13 07:14:17,564 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 8] total 15 [2024-10-13 07:14:17,564 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [281092023] [2024-10-13 07:14:17,564 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-13 07:14:17,565 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-10-13 07:14:17,565 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 07:14:17,565 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-10-13 07:14:17,566 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2024-10-13 07:14:17,573 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 21 [2024-10-13 07:14:17,574 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 229 places, 963 transitions, 20009 flow. Second operand has 15 states, 15 states have (on average 5.666666666666667) internal successors, (85), 15 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 07:14:17,574 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-13 07:14:17,574 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 21 [2024-10-13 07:14:17,574 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-13 07:14:20,297 INFO L124 PetriNetUnfolderBase]: 3921/6598 cut-off events. [2024-10-13 07:14:20,297 INFO L125 PetriNetUnfolderBase]: For 113141/113141 co-relation queries the response was YES. [2024-10-13 07:14:20,332 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58542 conditions, 6598 events. 3921/6598 cut-off events. For 113141/113141 co-relation queries the response was YES. Maximal size of possible extension queue 352. Compared 41654 event pairs, 42 based on Foata normal form. 118/6716 useless extension candidates. Maximal degree in co-relation 57493. Up to 1299 conditions per place. [2024-10-13 07:14:20,378 INFO L140 encePairwiseOnDemand]: 11/21 looper letters, 413 selfloop transitions, 1255 changer transitions 17/1686 dead transitions. [2024-10-13 07:14:20,379 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 265 places, 1686 transitions, 37313 flow [2024-10-13 07:14:20,379 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2024-10-13 07:14:20,379 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2024-10-13 07:14:20,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 320 transitions. [2024-10-13 07:14:20,381 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4118404118404118 [2024-10-13 07:14:20,381 INFO L175 Difference]: Start difference. First operand has 229 places, 963 transitions, 20009 flow. Second operand 37 states and 320 transitions. [2024-10-13 07:14:20,381 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 265 places, 1686 transitions, 37313 flow [2024-10-13 07:14:21,926 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 256 places, 1686 transitions, 36160 flow, removed 97 selfloop flow, removed 9 redundant places. [2024-10-13 07:14:21,951 INFO L231 Difference]: Finished difference. Result has 279 places, 1501 transitions, 35585 flow [2024-10-13 07:14:21,952 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=19272, PETRI_DIFFERENCE_MINUEND_PLACES=220, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=958, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=744, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=133, PETRI_DIFFERENCE_SUBTRAHEND_STATES=37, PETRI_FLOW=35585, PETRI_PLACES=279, PETRI_TRANSITIONS=1501} [2024-10-13 07:14:21,952 INFO L277 CegarLoopForPetriNet]: 23 programPoint places, 256 predicate places. [2024-10-13 07:14:21,952 INFO L471 AbstractCegarLoop]: Abstraction has has 279 places, 1501 transitions, 35585 flow [2024-10-13 07:14:21,953 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 5.666666666666667) internal successors, (85), 15 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 07:14:21,953 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-13 07:14:21,953 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-13 07:14:21,969 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2024-10-13 07:14:22,157 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2024-10-13 07:14:22,158 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-13 07:14:22,159 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 07:14:22,159 INFO L85 PathProgramCache]: Analyzing trace with hash 771752695, now seen corresponding path program 9 times [2024-10-13 07:14:22,159 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 07:14:22,159 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2067563773] [2024-10-13 07:14:22,159 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 07:14:22,160 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 07:14:22,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 07:14:22,388 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 07:14:22,389 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 07:14:22,389 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2067563773] [2024-10-13 07:14:22,389 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2067563773] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-13 07:14:22,389 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [668020971] [2024-10-13 07:14:22,389 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-10-13 07:14:22,389 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 07:14:22,389 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-13 07:14:22,390 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-13 07:14:22,391 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-10-13 07:14:22,439 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2024-10-13 07:14:22,439 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-13 07:14:22,440 INFO L255 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-10-13 07:14:22,441 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-13 07:14:22,541 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 07:14:22,541 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-13 07:14:22,698 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 07:14:22,698 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [668020971] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-13 07:14:22,698 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-13 07:14:22,699 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 7] total 16 [2024-10-13 07:14:22,699 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [486950902] [2024-10-13 07:14:22,699 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-13 07:14:22,699 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-10-13 07:14:22,700 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 07:14:22,700 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-10-13 07:14:22,700 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=168, Unknown=0, NotChecked=0, Total=240 [2024-10-13 07:14:22,716 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 21 [2024-10-13 07:14:22,716 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 279 places, 1501 transitions, 35585 flow. Second operand has 16 states, 16 states have (on average 6.25) internal successors, (100), 16 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 07:14:22,717 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-13 07:14:22,717 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 21 [2024-10-13 07:14:22,717 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-13 07:14:25,696 INFO L124 PetriNetUnfolderBase]: 3792/6553 cut-off events. [2024-10-13 07:14:25,696 INFO L125 PetriNetUnfolderBase]: For 165206/165298 co-relation queries the response was YES. [2024-10-13 07:14:25,732 INFO L83 FinitePrefix]: Finished finitePrefix Result has 66708 conditions, 6553 events. 3792/6553 cut-off events. For 165206/165298 co-relation queries the response was YES. Maximal size of possible extension queue 371. Compared 43426 event pairs, 416 based on Foata normal form. 24/6577 useless extension candidates. Maximal degree in co-relation 66276. Up to 2425 conditions per place. [2024-10-13 07:14:25,780 INFO L140 encePairwiseOnDemand]: 12/21 looper letters, 508 selfloop transitions, 1096 changer transitions 5/1643 dead transitions. [2024-10-13 07:14:25,780 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 296 places, 1643 transitions, 41820 flow [2024-10-13 07:14:25,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2024-10-13 07:14:25,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2024-10-13 07:14:25,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 165 transitions. [2024-10-13 07:14:25,782 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4365079365079365 [2024-10-13 07:14:25,782 INFO L175 Difference]: Start difference. First operand has 279 places, 1501 transitions, 35585 flow. Second operand 18 states and 165 transitions. [2024-10-13 07:14:25,782 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 296 places, 1643 transitions, 41820 flow [2024-10-13 07:14:27,924 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 294 places, 1643 transitions, 41356 flow, removed 203 selfloop flow, removed 2 redundant places. [2024-10-13 07:14:27,958 INFO L231 Difference]: Finished difference. Result has 301 places, 1605 transitions, 42232 flow [2024-10-13 07:14:27,959 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=35085, PETRI_DIFFERENCE_MINUEND_PLACES=277, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1498, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=986, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=440, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=42232, PETRI_PLACES=301, PETRI_TRANSITIONS=1605} [2024-10-13 07:14:27,960 INFO L277 CegarLoopForPetriNet]: 23 programPoint places, 278 predicate places. [2024-10-13 07:14:27,960 INFO L471 AbstractCegarLoop]: Abstraction has has 301 places, 1605 transitions, 42232 flow [2024-10-13 07:14:27,960 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 6.25) internal successors, (100), 16 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 07:14:27,960 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-13 07:14:27,960 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-13 07:14:27,973 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2024-10-13 07:14:28,161 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 07:14:28,161 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-13 07:14:28,161 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 07:14:28,161 INFO L85 PathProgramCache]: Analyzing trace with hash 384091021, now seen corresponding path program 10 times [2024-10-13 07:14:28,161 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 07:14:28,162 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2139661974] [2024-10-13 07:14:28,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 07:14:28,162 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 07:14:28,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 07:14:28,350 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 07:14:28,351 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 07:14:28,351 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2139661974] [2024-10-13 07:14:28,351 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2139661974] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-13 07:14:28,351 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1675435633] [2024-10-13 07:14:28,351 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-10-13 07:14:28,351 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 07:14:28,351 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-13 07:14:28,352 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-13 07:14:28,354 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-10-13 07:14:28,391 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-10-13 07:14:28,392 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-13 07:14:28,392 INFO L255 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-10-13 07:14:28,393 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-13 07:14:28,471 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 07:14:28,471 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-13 07:14:28,621 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 07:14:28,622 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1675435633] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-13 07:14:28,622 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-13 07:14:28,622 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 7] total 16 [2024-10-13 07:14:28,622 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1595830109] [2024-10-13 07:14:28,622 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-13 07:14:28,623 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-10-13 07:14:28,623 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 07:14:28,623 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-10-13 07:14:28,624 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2024-10-13 07:14:28,632 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 21 [2024-10-13 07:14:28,633 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 301 places, 1605 transitions, 42232 flow. Second operand has 16 states, 16 states have (on average 6.1875) internal successors, (99), 16 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 07:14:28,633 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-13 07:14:28,633 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 21 [2024-10-13 07:14:28,633 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-13 07:14:32,301 INFO L124 PetriNetUnfolderBase]: 4288/7347 cut-off events. [2024-10-13 07:14:32,301 INFO L125 PetriNetUnfolderBase]: For 231147/231215 co-relation queries the response was YES. [2024-10-13 07:14:32,355 INFO L83 FinitePrefix]: Finished finitePrefix Result has 82570 conditions, 7347 events. 4288/7347 cut-off events. For 231147/231215 co-relation queries the response was YES. Maximal size of possible extension queue 427. Compared 49259 event pairs, 244 based on Foata normal form. 44/7391 useless extension candidates. Maximal degree in co-relation 82472. Up to 1709 conditions per place. [2024-10-13 07:14:32,410 INFO L140 encePairwiseOnDemand]: 12/21 looper letters, 382 selfloop transitions, 1462 changer transitions 4/1882 dead transitions. [2024-10-13 07:14:32,410 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 321 places, 1882 transitions, 52516 flow [2024-10-13 07:14:32,411 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2024-10-13 07:14:32,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2024-10-13 07:14:32,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 222 transitions. [2024-10-13 07:14:32,412 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.44047619047619047 [2024-10-13 07:14:32,412 INFO L175 Difference]: Start difference. First operand has 301 places, 1605 transitions, 42232 flow. Second operand 24 states and 222 transitions. [2024-10-13 07:14:32,412 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 321 places, 1882 transitions, 52516 flow [2024-10-13 07:14:35,563 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 318 places, 1882 transitions, 52327 flow, removed 68 selfloop flow, removed 3 redundant places. [2024-10-13 07:14:35,615 INFO L231 Difference]: Finished difference. Result has 331 places, 1806 transitions, 53299 flow [2024-10-13 07:14:35,617 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=41878, PETRI_DIFFERENCE_MINUEND_PLACES=295, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1597, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1263, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=277, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=53299, PETRI_PLACES=331, PETRI_TRANSITIONS=1806} [2024-10-13 07:14:35,618 INFO L277 CegarLoopForPetriNet]: 23 programPoint places, 308 predicate places. [2024-10-13 07:14:35,618 INFO L471 AbstractCegarLoop]: Abstraction has has 331 places, 1806 transitions, 53299 flow [2024-10-13 07:14:35,618 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 6.1875) internal successors, (99), 16 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 07:14:35,618 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-13 07:14:35,618 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-13 07:14:35,636 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2024-10-13 07:14:35,819 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2024-10-13 07:14:35,819 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-13 07:14:35,820 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 07:14:35,820 INFO L85 PathProgramCache]: Analyzing trace with hash 403176601, now seen corresponding path program 11 times [2024-10-13 07:14:35,820 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 07:14:35,820 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1627891580] [2024-10-13 07:14:35,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 07:14:35,820 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 07:14:35,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 07:14:35,956 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 07:14:35,956 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 07:14:35,956 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1627891580] [2024-10-13 07:14:35,956 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1627891580] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-13 07:14:35,956 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [906132082] [2024-10-13 07:14:35,956 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-10-13 07:14:35,956 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 07:14:35,956 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-13 07:14:35,958 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-13 07:14:35,964 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-10-13 07:14:36,007 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2024-10-13 07:14:36,007 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-13 07:14:36,008 INFO L255 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-10-13 07:14:36,009 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-13 07:14:36,058 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 07:14:36,058 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-13 07:14:36,162 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 07:14:36,163 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [906132082] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-13 07:14:36,163 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-13 07:14:36,163 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 8] total 14 [2024-10-13 07:14:36,163 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1802999396] [2024-10-13 07:14:36,163 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-13 07:14:36,163 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-10-13 07:14:36,163 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 07:14:36,164 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-10-13 07:14:36,164 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=133, Unknown=0, NotChecked=0, Total=182 [2024-10-13 07:14:36,173 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 21 [2024-10-13 07:14:36,174 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 331 places, 1806 transitions, 53299 flow. Second operand has 14 states, 14 states have (on average 6.214285714285714) internal successors, (87), 14 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 07:14:36,174 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-13 07:14:36,174 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 21 [2024-10-13 07:14:36,174 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-13 07:14:42,359 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-10-13 07:14:46,075 INFO L124 PetriNetUnfolderBase]: 5927/10119 cut-off events. [2024-10-13 07:14:46,075 INFO L125 PetriNetUnfolderBase]: For 392358/392452 co-relation queries the response was YES. [2024-10-13 07:14:46,160 INFO L83 FinitePrefix]: Finished finitePrefix Result has 126105 conditions, 10119 events. 5927/10119 cut-off events. For 392358/392452 co-relation queries the response was YES. Maximal size of possible extension queue 509. Compared 69596 event pairs, 421 based on Foata normal form. 151/10262 useless extension candidates. Maximal degree in co-relation 125994. Up to 2797 conditions per place. [2024-10-13 07:14:46,239 INFO L140 encePairwiseOnDemand]: 13/21 looper letters, 1044 selfloop transitions, 1608 changer transitions 4/2690 dead transitions. [2024-10-13 07:14:46,239 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 363 places, 2690 transitions, 84961 flow [2024-10-13 07:14:46,240 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2024-10-13 07:14:46,240 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2024-10-13 07:14:46,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 313 transitions. [2024-10-13 07:14:46,241 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.45165945165945165 [2024-10-13 07:14:46,241 INFO L175 Difference]: Start difference. First operand has 331 places, 1806 transitions, 53299 flow. Second operand 33 states and 313 transitions. [2024-10-13 07:14:46,241 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 363 places, 2690 transitions, 84961 flow [2024-10-13 07:14:53,439 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 360 places, 2690 transitions, 83556 flow, removed 606 selfloop flow, removed 3 redundant places. [2024-10-13 07:14:53,504 INFO L231 Difference]: Finished difference. Result has 384 places, 2473 transitions, 79670 flow [2024-10-13 07:14:53,506 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=52319, PETRI_DIFFERENCE_MINUEND_PLACES=328, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1806, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=987, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=588, PETRI_DIFFERENCE_SUBTRAHEND_STATES=33, PETRI_FLOW=79670, PETRI_PLACES=384, PETRI_TRANSITIONS=2473} [2024-10-13 07:14:53,507 INFO L277 CegarLoopForPetriNet]: 23 programPoint places, 361 predicate places. [2024-10-13 07:14:53,507 INFO L471 AbstractCegarLoop]: Abstraction has has 384 places, 2473 transitions, 79670 flow [2024-10-13 07:14:53,508 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 6.214285714285714) internal successors, (87), 14 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 07:14:53,508 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-13 07:14:53,508 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-13 07:14:53,525 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2024-10-13 07:14:53,709 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2024-10-13 07:14:53,709 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-13 07:14:53,709 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 07:14:53,710 INFO L85 PathProgramCache]: Analyzing trace with hash -1722937067, now seen corresponding path program 12 times [2024-10-13 07:14:53,710 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 07:14:53,710 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1123325647] [2024-10-13 07:14:53,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 07:14:53,710 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 07:14:53,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 07:14:53,868 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 07:14:53,868 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 07:14:53,868 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1123325647] [2024-10-13 07:14:53,868 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1123325647] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-13 07:14:53,869 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [507243078] [2024-10-13 07:14:53,869 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-10-13 07:14:53,869 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 07:14:53,869 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-13 07:14:53,871 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-13 07:14:53,872 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-10-13 07:14:53,920 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2024-10-13 07:14:53,921 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-13 07:14:53,922 INFO L255 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-10-13 07:14:53,925 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-13 07:14:54,031 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 07:14:54,031 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-13 07:14:54,245 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 07:14:54,246 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [507243078] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-13 07:14:54,246 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-13 07:14:54,246 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 8] total 17 [2024-10-13 07:14:54,246 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [820686040] [2024-10-13 07:14:54,246 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-13 07:14:54,246 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-10-13 07:14:54,247 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 07:14:54,247 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-10-13 07:14:54,247 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=200, Unknown=0, NotChecked=0, Total=272 [2024-10-13 07:14:54,255 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 21 [2024-10-13 07:14:54,256 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 384 places, 2473 transitions, 79670 flow. Second operand has 17 states, 17 states have (on average 5.9411764705882355) internal successors, (101), 17 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 07:14:54,256 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-13 07:14:54,256 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 21 [2024-10-13 07:14:54,256 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-13 07:15:02,602 INFO L124 PetriNetUnfolderBase]: 6387/10933 cut-off events. [2024-10-13 07:15:02,602 INFO L125 PetriNetUnfolderBase]: For 458580/458678 co-relation queries the response was YES. [2024-10-13 07:15:02,706 INFO L83 FinitePrefix]: Finished finitePrefix Result has 144938 conditions, 10933 events. 6387/10933 cut-off events. For 458580/458678 co-relation queries the response was YES. Maximal size of possible extension queue 547. Compared 76335 event pairs, 572 based on Foata normal form. 83/10998 useless extension candidates. Maximal degree in co-relation 144805. Up to 3836 conditions per place. [2024-10-13 07:15:02,779 INFO L140 encePairwiseOnDemand]: 13/21 looper letters, 1195 selfloop transitions, 1517 changer transitions 2/2748 dead transitions. [2024-10-13 07:15:02,779 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 406 places, 2748 transitions, 92993 flow [2024-10-13 07:15:02,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2024-10-13 07:15:02,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2024-10-13 07:15:02,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 246 transitions. [2024-10-13 07:15:02,780 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.45054945054945056 [2024-10-13 07:15:02,781 INFO L175 Difference]: Start difference. First operand has 384 places, 2473 transitions, 79670 flow. Second operand 26 states and 246 transitions. [2024-10-13 07:15:02,781 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 406 places, 2748 transitions, 92993 flow [2024-10-13 07:15:11,684 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 397 places, 2748 transitions, 91337 flow, removed 194 selfloop flow, removed 9 redundant places. [2024-10-13 07:15:11,750 INFO L231 Difference]: Finished difference. Result has 408 places, 2633 transitions, 89146 flow [2024-10-13 07:15:11,752 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=77452, PETRI_DIFFERENCE_MINUEND_PLACES=372, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2452, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1337, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1005, PETRI_DIFFERENCE_SUBTRAHEND_STATES=26, PETRI_FLOW=89146, PETRI_PLACES=408, PETRI_TRANSITIONS=2633} [2024-10-13 07:15:11,752 INFO L277 CegarLoopForPetriNet]: 23 programPoint places, 385 predicate places. [2024-10-13 07:15:11,752 INFO L471 AbstractCegarLoop]: Abstraction has has 408 places, 2633 transitions, 89146 flow [2024-10-13 07:15:11,753 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 5.9411764705882355) internal successors, (101), 17 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 07:15:11,753 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-13 07:15:11,753 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-13 07:15:11,765 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2024-10-13 07:15:11,953 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2024-10-13 07:15:11,953 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-13 07:15:11,954 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 07:15:11,954 INFO L85 PathProgramCache]: Analyzing trace with hash -1690546735, now seen corresponding path program 13 times [2024-10-13 07:15:11,954 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 07:15:11,954 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1897940347] [2024-10-13 07:15:11,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 07:15:11,954 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 07:15:11,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 07:15:12,116 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 07:15:12,117 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 07:15:12,117 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1897940347] [2024-10-13 07:15:12,117 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1897940347] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-13 07:15:12,117 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1277557918] [2024-10-13 07:15:12,117 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-10-13 07:15:12,117 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 07:15:12,117 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-13 07:15:12,119 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-13 07:15:12,119 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-10-13 07:15:12,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 07:15:12,166 INFO L255 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-10-13 07:15:12,167 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-13 07:15:12,276 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 07:15:12,276 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-13 07:15:12,535 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 07:15:12,535 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1277557918] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-13 07:15:12,535 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-13 07:15:12,535 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 8] total 18 [2024-10-13 07:15:12,535 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [7032357] [2024-10-13 07:15:12,535 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-13 07:15:12,536 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-10-13 07:15:12,536 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 07:15:12,536 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-10-13 07:15:12,537 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=227, Unknown=0, NotChecked=0, Total=306 [2024-10-13 07:15:12,550 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 21 [2024-10-13 07:15:12,550 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 408 places, 2633 transitions, 89146 flow. Second operand has 18 states, 18 states have (on average 6.055555555555555) internal successors, (109), 18 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 07:15:12,550 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-13 07:15:12,551 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 21 [2024-10-13 07:15:12,551 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-13 07:15:21,355 INFO L124 PetriNetUnfolderBase]: 6450/11036 cut-off events. [2024-10-13 07:15:21,355 INFO L125 PetriNetUnfolderBase]: For 521481/521591 co-relation queries the response was YES. [2024-10-13 07:15:21,475 INFO L83 FinitePrefix]: Finished finitePrefix Result has 152753 conditions, 11036 events. 6450/11036 cut-off events. For 521481/521591 co-relation queries the response was YES. Maximal size of possible extension queue 541. Compared 77177 event pairs, 1132 based on Foata normal form. 28/11060 useless extension candidates. Maximal degree in co-relation 152616. Up to 6431 conditions per place. [2024-10-13 07:15:21,551 INFO L140 encePairwiseOnDemand]: 12/21 looper letters, 1410 selfloop transitions, 1236 changer transitions 4/2684 dead transitions. [2024-10-13 07:15:21,552 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 420 places, 2684 transitions, 95668 flow [2024-10-13 07:15:21,552 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-10-13 07:15:21,552 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-10-13 07:15:21,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 116 transitions. [2024-10-13 07:15:21,553 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4249084249084249 [2024-10-13 07:15:21,553 INFO L175 Difference]: Start difference. First operand has 408 places, 2633 transitions, 89146 flow. Second operand 13 states and 116 transitions. [2024-10-13 07:15:21,553 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 420 places, 2684 transitions, 95668 flow