./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/weaver/popl20-more-nonblocking-counter-alt2.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 8be7027f Calling Ultimate with: /root/.sdkman/candidates/java/11.0.12-open/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/weaver/popl20-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-wip.dk.perfect-tracechecks-8be7027-m [2024-11-12 08:27:05,926 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-12 08:27:06,025 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-11-12 08:27:06,034 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-12 08:27:06,038 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-12 08:27:06,080 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-12 08:27:06,080 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-12 08:27:06,081 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-12 08:27:06,082 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-12 08:27:06,086 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-12 08:27:06,087 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-12 08:27:06,087 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-12 08:27:06,087 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-12 08:27:06,088 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-12 08:27:06,088 INFO L153 SettingsManager]: * Use SBE=true [2024-11-12 08:27:06,088 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-12 08:27:06,089 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-11-12 08:27:06,089 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-12 08:27:06,089 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-12 08:27:06,089 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-12 08:27:06,090 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-12 08:27:06,093 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-11-12 08:27:06,093 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-12 08:27:06,093 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-11-12 08:27:06,094 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-12 08:27:06,097 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-12 08:27:06,097 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-11-12 08:27:06,098 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-12 08:27:06,098 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-12 08:27:06,098 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-12 08:27:06,101 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-12 08:27:06,101 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-12 08:27:06,101 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-12 08:27:06,102 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-12 08:27:06,102 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-12 08:27:06,106 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-11-12 08:27:06,106 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-12 08:27:06,106 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-12 08:27:06,107 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-12 08:27:06,107 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-12 08:27:06,107 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-12 08:27:06,108 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-12 08:27:06,108 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 87e1a1d3acb3ee9b7a4a97eb7b14df31d5b38b7566b1218cea0dabfe5ec8ddbd [2024-11-12 08:27:06,420 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-12 08:27:06,442 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-12 08:27:06,444 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-12 08:27:06,445 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-12 08:27:06,446 INFO L274 PluginConnector]: CDTParser initialized [2024-11-12 08:27:06,447 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/weaver/popl20-more-nonblocking-counter-alt2.wvr.c [2024-11-12 08:27:07,757 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-12 08:27:07,912 INFO L384 CDTParser]: Found 1 translation units. [2024-11-12 08:27:07,913 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/popl20-more-nonblocking-counter-alt2.wvr.c [2024-11-12 08:27:07,918 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a5e199bf2/09a621cc25c34782ad639c1c22d4d05c/FLAG5cac963b5 [2024-11-12 08:27:08,327 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a5e199bf2/09a621cc25c34782ad639c1c22d4d05c [2024-11-12 08:27:08,329 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-12 08:27:08,330 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-12 08:27:08,331 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-12 08:27:08,331 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-12 08:27:08,338 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-12 08:27:08,338 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 08:27:08" (1/1) ... [2024-11-12 08:27:08,339 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@435394d1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 08:27:08, skipping insertion in model container [2024-11-12 08:27:08,339 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 08:27:08" (1/1) ... [2024-11-12 08:27:08,354 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-12 08:27:08,540 WARN L250 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/popl20-more-nonblocking-counter-alt2.wvr.c[2173,2186] [2024-11-12 08:27:08,544 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-12 08:27:08,550 INFO L200 MainTranslator]: Completed pre-run [2024-11-12 08:27:08,565 WARN L250 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/popl20-more-nonblocking-counter-alt2.wvr.c[2173,2186] [2024-11-12 08:27:08,567 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-12 08:27:08,583 INFO L204 MainTranslator]: Completed translation [2024-11-12 08:27:08,584 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 08:27:08 WrapperNode [2024-11-12 08:27:08,584 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-12 08:27:08,585 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-12 08:27:08,585 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-12 08:27:08,585 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-12 08:27:08,590 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 08:27:08" (1/1) ... [2024-11-12 08:27:08,595 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 08:27:08" (1/1) ... [2024-11-12 08:27:08,614 INFO L138 Inliner]: procedures = 20, calls = 14, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 44 [2024-11-12 08:27:08,614 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-12 08:27:08,615 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-12 08:27:08,615 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-12 08:27:08,615 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-12 08:27:08,633 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 08:27:08" (1/1) ... [2024-11-12 08:27:08,633 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 08:27:08" (1/1) ... [2024-11-12 08:27:08,638 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 08:27:08" (1/1) ... [2024-11-12 08:27:08,656 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]. [2024-11-12 08:27:08,660 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 08:27:08" (1/1) ... [2024-11-12 08:27:08,662 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 08:27:08" (1/1) ... [2024-11-12 08:27:08,669 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 08:27:08" (1/1) ... [2024-11-12 08:27:08,676 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 08:27:08" (1/1) ... [2024-11-12 08:27:08,679 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 08:27:08" (1/1) ... [2024-11-12 08:27:08,684 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 08:27:08" (1/1) ... [2024-11-12 08:27:08,685 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-12 08:27:08,689 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-12 08:27:08,689 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-12 08:27:08,689 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-12 08:27:08,690 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 08:27:08" (1/1) ... [2024-11-12 08:27:08,700 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-12 08:27:08,728 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-12 08:27:08,764 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-11-12 08:27:08,767 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-11-12 08:27:08,802 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-12 08:27:08,802 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2024-11-12 08:27:08,802 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2024-11-12 08:27:08,802 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2024-11-12 08:27:08,802 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2024-11-12 08:27:08,802 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-11-12 08:27:08,803 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-11-12 08:27:08,803 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-11-12 08:27:08,804 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-12 08:27:08,805 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-12 08:27:08,806 WARN L207 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2024-11-12 08:27:08,919 INFO L238 CfgBuilder]: Building ICFG [2024-11-12 08:27:08,921 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-12 08:27:09,136 INFO L283 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2024-11-12 08:27:09,136 INFO L287 CfgBuilder]: Performing block encoding [2024-11-12 08:27:09,233 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-12 08:27:09,233 INFO L316 CfgBuilder]: Removed 2 assume(true) statements. [2024-11-12 08:27:09,234 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 08:27:09 BoogieIcfgContainer [2024-11-12 08:27:09,234 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-12 08:27:09,236 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-12 08:27:09,236 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-12 08:27:09,238 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-12 08:27:09,239 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.11 08:27:08" (1/3) ... [2024-11-12 08:27:09,239 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6fde5526 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 08:27:09, skipping insertion in model container [2024-11-12 08:27:09,239 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 08:27:08" (2/3) ... [2024-11-12 08:27:09,239 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6fde5526 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 08:27:09, skipping insertion in model container [2024-11-12 08:27:09,240 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 08:27:09" (3/3) ... [2024-11-12 08:27:09,241 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-more-nonblocking-counter-alt2.wvr.c [2024-11-12 08:27:09,253 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-12 08:27:09,254 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-11-12 08:27:09,254 INFO L489 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-11-12 08:27:09,321 INFO L143 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2024-11-12 08:27:09,353 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 26 places, 21 transitions, 56 flow [2024-11-12 08:27:09,378 INFO L124 PetriNetUnfolderBase]: 2/19 cut-off events. [2024-11-12 08:27:09,379 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-11-12 08:27:09,381 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. [2024-11-12 08:27:09,382 INFO L82 GeneralOperation]: Start removeDead. Operand has 26 places, 21 transitions, 56 flow [2024-11-12 08:27:09,384 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 23 places, 18 transitions, 48 flow [2024-11-12 08:27:09,394 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-12 08:27:09,402 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;@2a0b733c, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-12 08:27:09,402 INFO L334 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2024-11-12 08:27:09,409 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-11-12 08:27:09,409 INFO L124 PetriNetUnfolderBase]: 2/17 cut-off events. [2024-11-12 08:27:09,409 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-11-12 08:27:09,410 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-12 08:27:09,410 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-12 08:27:09,411 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-12 08:27:09,417 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 08:27:09,417 INFO L85 PathProgramCache]: Analyzing trace with hash 1426367925, now seen corresponding path program 1 times [2024-11-12 08:27:09,426 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 08:27:09,426 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [381673294] [2024-11-12 08:27:09,427 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 08:27:09,428 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 08:27:09,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 08:27:09,665 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-12 08:27:09,666 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-12 08:27:09,666 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [381673294] [2024-11-12 08:27:09,667 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [381673294] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-12 08:27:09,667 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-12 08:27:09,667 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-12 08:27:09,668 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [390997339] [2024-11-12 08:27:09,669 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-12 08:27:09,675 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-12 08:27:09,678 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-12 08:27:09,696 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-12 08:27:09,696 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-12 08:27:09,701 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 21 [2024-11-12 08:27:09,703 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) [2024-11-12 08:27:09,704 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-12 08:27:09,704 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 21 [2024-11-12 08:27:09,704 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-12 08:27:09,780 INFO L124 PetriNetUnfolderBase]: 73/144 cut-off events. [2024-11-12 08:27:09,782 INFO L125 PetriNetUnfolderBase]: For 14/14 co-relation queries the response was YES. [2024-11-12 08:27:09,783 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. [2024-11-12 08:27:09,785 INFO L140 encePairwiseOnDemand]: 18/21 looper letters, 20 selfloop transitions, 2 changer transitions 3/28 dead transitions. [2024-11-12 08:27:09,785 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 25 places, 28 transitions, 127 flow [2024-11-12 08:27:09,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-12 08:27:09,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-12 08:27:09,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 41 transitions. [2024-11-12 08:27:09,794 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6507936507936508 [2024-11-12 08:27:09,795 INFO L175 Difference]: Start difference. First operand has 23 places, 18 transitions, 48 flow. Second operand 3 states and 41 transitions. [2024-11-12 08:27:09,796 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 25 places, 28 transitions, 127 flow [2024-11-12 08:27:09,798 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 21 places, 28 transitions, 113 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-11-12 08:27:09,799 INFO L231 Difference]: Finished difference. Result has 22 places, 19 transitions, 52 flow [2024-11-12 08:27:09,801 INFO L262 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} [2024-11-12 08:27:09,803 INFO L279 CegarLoopForPetriNet]: 23 programPoint places, -1 predicate places. [2024-11-12 08:27:09,803 INFO L471 AbstractCegarLoop]: Abstraction has has 22 places, 19 transitions, 52 flow [2024-11-12 08:27:09,804 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) [2024-11-12 08:27:09,804 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-12 08:27:09,804 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-12 08:27:09,804 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-12 08:27:09,804 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-12 08:27:09,805 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 08:27:09,805 INFO L85 PathProgramCache]: Analyzing trace with hash 2133826849, now seen corresponding path program 1 times [2024-11-12 08:27:09,805 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 08:27:09,805 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1088092307] [2024-11-12 08:27:09,806 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 08:27:09,808 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 08:27:09,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 08:27:10,007 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-12 08:27:10,007 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-12 08:27:10,008 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1088092307] [2024-11-12 08:27:10,008 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1088092307] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-12 08:27:10,008 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-12 08:27:10,008 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-12 08:27:10,008 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1216024431] [2024-11-12 08:27:10,009 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-12 08:27:10,010 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-12 08:27:10,010 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-12 08:27:10,011 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-12 08:27:10,011 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-11-12 08:27:10,014 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 21 [2024-11-12 08:27:10,014 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) [2024-11-12 08:27:10,015 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-12 08:27:10,015 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 21 [2024-11-12 08:27:10,015 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-12 08:27:10,105 INFO L124 PetriNetUnfolderBase]: 141/258 cut-off events. [2024-11-12 08:27:10,106 INFO L125 PetriNetUnfolderBase]: For 8/8 co-relation queries the response was YES. [2024-11-12 08:27:10,107 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. [2024-11-12 08:27:10,108 INFO L140 encePairwiseOnDemand]: 17/21 looper letters, 21 selfloop transitions, 3 changer transitions 0/27 dead transitions. [2024-11-12 08:27:10,108 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 25 places, 27 transitions, 117 flow [2024-11-12 08:27:10,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-12 08:27:10,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-12 08:27:10,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 41 transitions. [2024-11-12 08:27:10,110 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4880952380952381 [2024-11-12 08:27:10,110 INFO L175 Difference]: Start difference. First operand has 22 places, 19 transitions, 52 flow. Second operand 4 states and 41 transitions. [2024-11-12 08:27:10,110 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 25 places, 27 transitions, 117 flow [2024-11-12 08:27:10,110 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 24 places, 27 transitions, 115 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-12 08:27:10,111 INFO L231 Difference]: Finished difference. Result has 25 places, 20 transitions, 64 flow [2024-11-12 08:27:10,111 INFO L262 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} [2024-11-12 08:27:10,112 INFO L279 CegarLoopForPetriNet]: 23 programPoint places, 2 predicate places. [2024-11-12 08:27:10,112 INFO L471 AbstractCegarLoop]: Abstraction has has 25 places, 20 transitions, 64 flow [2024-11-12 08:27:10,112 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.5) internal successors, (30), 4 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-12 08:27:10,112 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-12 08:27:10,112 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-12 08:27:10,112 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-12 08:27:10,113 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-12 08:27:10,113 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 08:27:10,113 INFO L85 PathProgramCache]: Analyzing trace with hash -1055225553, now seen corresponding path program 1 times [2024-11-12 08:27:10,114 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 08:27:10,114 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1674825319] [2024-11-12 08:27:10,114 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 08:27:10,114 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 08:27:10,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 08:27:10,421 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-12 08:27:10,421 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-12 08:27:10,421 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1674825319] [2024-11-12 08:27:10,422 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1674825319] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-12 08:27:10,422 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [704161894] [2024-11-12 08:27:10,423 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 08:27:10,423 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-12 08:27:10,423 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-12 08:27:10,426 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-12 08:27:10,427 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-12 08:27:10,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 08:27:10,499 INFO L256 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 12 conjuncts are in the unsatisfiable core [2024-11-12 08:27:10,504 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-12 08:27:10,719 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-12 08:27:10,719 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-12 08:27:11,011 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-12 08:27:11,012 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [704161894] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-12 08:27:11,012 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-12 08:27:11,013 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 7] total 15 [2024-11-12 08:27:11,013 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [804650204] [2024-11-12 08:27:11,013 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-12 08:27:11,014 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-11-12 08:27:11,014 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-12 08:27:11,015 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-11-12 08:27:11,015 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=157, Unknown=0, NotChecked=0, Total=240 [2024-11-12 08:27:11,048 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 21 [2024-11-12 08:27:11,049 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 25 places, 20 transitions, 64 flow. Second operand has 16 states, 16 states have (on average 5.8125) internal successors, (93), 16 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-12 08:27:11,049 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-12 08:27:11,049 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 21 [2024-11-12 08:27:11,049 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-12 08:27:11,624 INFO L124 PetriNetUnfolderBase]: 580/998 cut-off events. [2024-11-12 08:27:11,625 INFO L125 PetriNetUnfolderBase]: For 237/237 co-relation queries the response was YES. [2024-11-12 08:27:11,627 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2436 conditions, 998 events. 580/998 cut-off events. For 237/237 co-relation queries the response was YES. Maximal size of possible extension queue 55. Compared 4177 event pairs, 28 based on Foata normal form. 2/920 useless extension candidates. Maximal degree in co-relation 879. Up to 244 conditions per place. [2024-11-12 08:27:11,634 INFO L140 encePairwiseOnDemand]: 12/21 looper letters, 114 selfloop transitions, 42 changer transitions 12/169 dead transitions. [2024-11-12 08:27:11,634 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 43 places, 169 transitions, 831 flow [2024-11-12 08:27:11,634 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2024-11-12 08:27:11,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2024-11-12 08:27:11,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 223 transitions. [2024-11-12 08:27:11,637 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5588972431077694 [2024-11-12 08:27:11,637 INFO L175 Difference]: Start difference. First operand has 25 places, 20 transitions, 64 flow. Second operand 19 states and 223 transitions. [2024-11-12 08:27:11,637 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 43 places, 169 transitions, 831 flow [2024-11-12 08:27:11,639 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 169 transitions, 807 flow, removed 5 selfloop flow, removed 2 redundant places. [2024-11-12 08:27:11,640 INFO L231 Difference]: Finished difference. Result has 52 places, 65 transitions, 412 flow [2024-11-12 08:27:11,641 INFO L262 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=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=11, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=412, PETRI_PLACES=52, PETRI_TRANSITIONS=65} [2024-11-12 08:27:11,641 INFO L279 CegarLoopForPetriNet]: 23 programPoint places, 29 predicate places. [2024-11-12 08:27:11,641 INFO L471 AbstractCegarLoop]: Abstraction has has 52 places, 65 transitions, 412 flow [2024-11-12 08:27:11,642 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 5.8125) internal successors, (93), 16 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-12 08:27:11,642 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-12 08:27:11,642 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-12 08:27:11,660 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-11-12 08:27:11,846 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 [2024-11-12 08:27:11,847 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-12 08:27:11,848 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 08:27:11,848 INFO L85 PathProgramCache]: Analyzing trace with hash -987841917, now seen corresponding path program 2 times [2024-11-12 08:27:11,848 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 08:27:11,848 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1477232624] [2024-11-12 08:27:11,848 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 08:27:11,849 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 08:27:11,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 08:27:11,956 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-12 08:27:11,957 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-12 08:27:11,957 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1477232624] [2024-11-12 08:27:11,957 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1477232624] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-12 08:27:11,957 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [813103342] [2024-11-12 08:27:11,957 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-12 08:27:11,957 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-12 08:27:11,957 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-12 08:27:11,959 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-12 08:27:11,960 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-12 08:27:12,010 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-12 08:27:12,010 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-12 08:27:12,011 INFO L256 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 15 conjuncts are in the unsatisfiable core [2024-11-12 08:27:12,012 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-12 08:27:12,082 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-12 08:27:12,083 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-12 08:27:12,083 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [813103342] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-12 08:27:12,083 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-12 08:27:12,083 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [4] total 8 [2024-11-12 08:27:12,083 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [585279374] [2024-11-12 08:27:12,083 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-12 08:27:12,084 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-12 08:27:12,084 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-12 08:27:12,085 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-12 08:27:12,085 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=43, Unknown=0, NotChecked=0, Total=72 [2024-11-12 08:27:12,091 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 21 [2024-11-12 08:27:12,091 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 65 transitions, 412 flow. Second operand has 6 states, 6 states have (on average 5.833333333333333) internal successors, (35), 6 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-12 08:27:12,091 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-12 08:27:12,092 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 21 [2024-11-12 08:27:12,092 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-12 08:27:12,241 INFO L124 PetriNetUnfolderBase]: 604/1038 cut-off events. [2024-11-12 08:27:12,241 INFO L125 PetriNetUnfolderBase]: For 1854/1854 co-relation queries the response was YES. [2024-11-12 08:27:12,244 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3700 conditions, 1038 events. 604/1038 cut-off events. For 1854/1854 co-relation queries the response was YES. Maximal size of possible extension queue 54. Compared 4354 event pairs, 175 based on Foata normal form. 2/1040 useless extension candidates. Maximal degree in co-relation 3401. Up to 912 conditions per place. [2024-11-12 08:27:12,248 INFO L140 encePairwiseOnDemand]: 14/21 looper letters, 80 selfloop transitions, 9 changer transitions 0/90 dead transitions. [2024-11-12 08:27:12,248 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 90 transitions, 729 flow [2024-11-12 08:27:12,249 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-12 08:27:12,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-12 08:27:12,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 64 transitions. [2024-11-12 08:27:12,250 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5079365079365079 [2024-11-12 08:27:12,251 INFO L175 Difference]: Start difference. First operand has 52 places, 65 transitions, 412 flow. Second operand 6 states and 64 transitions. [2024-11-12 08:27:12,251 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 90 transitions, 729 flow [2024-11-12 08:27:12,262 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 90 transitions, 685 flow, removed 20 selfloop flow, removed 1 redundant places. [2024-11-12 08:27:12,263 INFO L231 Difference]: Finished difference. Result has 59 places, 69 transitions, 435 flow [2024-11-12 08:27:12,263 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=369, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=65, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=435, PETRI_PLACES=59, PETRI_TRANSITIONS=69} [2024-11-12 08:27:12,264 INFO L279 CegarLoopForPetriNet]: 23 programPoint places, 36 predicate places. [2024-11-12 08:27:12,264 INFO L471 AbstractCegarLoop]: Abstraction has has 59 places, 69 transitions, 435 flow [2024-11-12 08:27:12,264 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 5.833333333333333) internal successors, (35), 6 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-12 08:27:12,264 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-12 08:27:12,265 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-12 08:27:12,279 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-11-12 08:27:12,465 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 [2024-11-12 08:27:12,466 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-12 08:27:12,466 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 08:27:12,467 INFO L85 PathProgramCache]: Analyzing trace with hash -1873640197, now seen corresponding path program 3 times [2024-11-12 08:27:12,467 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 08:27:12,467 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [190786059] [2024-11-12 08:27:12,467 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 08:27:12,467 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 08:27:12,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 08:27:12,548 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-12 08:27:12,549 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-12 08:27:12,549 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [190786059] [2024-11-12 08:27:12,549 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [190786059] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-12 08:27:12,549 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1769291775] [2024-11-12 08:27:12,549 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-12 08:27:12,550 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-12 08:27:12,550 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-12 08:27:12,551 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-12 08:27:12,554 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-12 08:27:12,595 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-11-12 08:27:12,595 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-12 08:27:12,596 INFO L256 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 15 conjuncts are in the unsatisfiable core [2024-11-12 08:27:12,597 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-12 08:27:12,673 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-12 08:27:12,674 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-12 08:27:12,674 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1769291775] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-12 08:27:12,674 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-12 08:27:12,674 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [4] total 8 [2024-11-12 08:27:12,674 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [494441978] [2024-11-12 08:27:12,674 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-12 08:27:12,674 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-12 08:27:12,675 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-12 08:27:12,675 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-12 08:27:12,675 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2024-11-12 08:27:12,683 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 21 [2024-11-12 08:27:12,683 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 69 transitions, 435 flow. Second operand has 6 states, 6 states have (on average 5.833333333333333) internal successors, (35), 6 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-12 08:27:12,683 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-12 08:27:12,683 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 21 [2024-11-12 08:27:12,683 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-12 08:27:12,817 INFO L124 PetriNetUnfolderBase]: 628/1078 cut-off events. [2024-11-12 08:27:12,817 INFO L125 PetriNetUnfolderBase]: For 2493/2493 co-relation queries the response was YES. [2024-11-12 08:27:12,820 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4077 conditions, 1078 events. 628/1078 cut-off events. For 2493/2493 co-relation queries the response was YES. Maximal size of possible extension queue 52. Compared 4559 event pairs, 186 based on Foata normal form. 4/1082 useless extension candidates. Maximal degree in co-relation 3563. Up to 920 conditions per place. [2024-11-12 08:27:12,823 INFO L140 encePairwiseOnDemand]: 14/21 looper letters, 77 selfloop transitions, 13 changer transitions 0/91 dead transitions. [2024-11-12 08:27:12,823 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 64 places, 91 transitions, 771 flow [2024-11-12 08:27:12,824 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-12 08:27:12,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-12 08:27:12,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 61 transitions. [2024-11-12 08:27:12,824 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.48412698412698413 [2024-11-12 08:27:12,824 INFO L175 Difference]: Start difference. First operand has 59 places, 69 transitions, 435 flow. Second operand 6 states and 61 transitions. [2024-11-12 08:27:12,825 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 64 places, 91 transitions, 771 flow [2024-11-12 08:27:12,831 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 62 places, 91 transitions, 742 flow, removed 10 selfloop flow, removed 2 redundant places. [2024-11-12 08:27:12,832 INFO L231 Difference]: Finished difference. Result has 64 places, 74 transitions, 507 flow [2024-11-12 08:27:12,832 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=418, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=69, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=507, PETRI_PLACES=64, PETRI_TRANSITIONS=74} [2024-11-12 08:27:12,833 INFO L279 CegarLoopForPetriNet]: 23 programPoint places, 41 predicate places. [2024-11-12 08:27:12,833 INFO L471 AbstractCegarLoop]: Abstraction has has 64 places, 74 transitions, 507 flow [2024-11-12 08:27:12,833 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 5.833333333333333) internal successors, (35), 6 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-12 08:27:12,833 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-12 08:27:12,833 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-12 08:27:12,848 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-11-12 08:27:13,037 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 [2024-11-12 08:27:13,038 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-12 08:27:13,041 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 08:27:13,041 INFO L85 PathProgramCache]: Analyzing trace with hash 1471076699, now seen corresponding path program 4 times [2024-11-12 08:27:13,041 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 08:27:13,041 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [820015860] [2024-11-12 08:27:13,041 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 08:27:13,041 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 08:27:13,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 08:27:13,164 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-12 08:27:13,165 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-12 08:27:13,168 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [820015860] [2024-11-12 08:27:13,168 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [820015860] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-12 08:27:13,168 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [148438792] [2024-11-12 08:27:13,169 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-12 08:27:13,169 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-12 08:27:13,169 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-12 08:27:13,170 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-12 08:27:13,173 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-12 08:27:13,232 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-12 08:27:13,233 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-12 08:27:13,233 INFO L256 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 12 conjuncts are in the unsatisfiable core [2024-11-12 08:27:13,235 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-12 08:27:13,283 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-12 08:27:13,284 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-12 08:27:13,284 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [148438792] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-12 08:27:13,284 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-12 08:27:13,284 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [4] total 6 [2024-11-12 08:27:13,284 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [102577817] [2024-11-12 08:27:13,284 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-12 08:27:13,285 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-12 08:27:13,285 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-12 08:27:13,285 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-12 08:27:13,286 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2024-11-12 08:27:13,292 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 21 [2024-11-12 08:27:13,293 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 74 transitions, 507 flow. Second operand has 7 states, 7 states have (on average 5.428571428571429) internal successors, (38), 7 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-12 08:27:13,293 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-12 08:27:13,293 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 21 [2024-11-12 08:27:13,293 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-12 08:27:13,448 INFO L124 PetriNetUnfolderBase]: 685/1181 cut-off events. [2024-11-12 08:27:13,448 INFO L125 PetriNetUnfolderBase]: For 3397/3397 co-relation queries the response was YES. [2024-11-12 08:27:13,453 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4489 conditions, 1181 events. 685/1181 cut-off events. For 3397/3397 co-relation queries the response was YES. Maximal size of possible extension queue 56. Compared 5160 event pairs, 163 based on Foata normal form. 26/1207 useless extension candidates. Maximal degree in co-relation 3955. Up to 825 conditions per place. [2024-11-12 08:27:13,459 INFO L140 encePairwiseOnDemand]: 15/21 looper letters, 79 selfloop transitions, 19 changer transitions 0/99 dead transitions. [2024-11-12 08:27:13,460 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 99 transitions, 828 flow [2024-11-12 08:27:13,460 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-12 08:27:13,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-11-12 08:27:13,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 68 transitions. [2024-11-12 08:27:13,461 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.46258503401360546 [2024-11-12 08:27:13,461 INFO L175 Difference]: Start difference. First operand has 64 places, 74 transitions, 507 flow. Second operand 7 states and 68 transitions. [2024-11-12 08:27:13,461 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 99 transitions, 828 flow [2024-11-12 08:27:13,470 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 99 transitions, 809 flow, removed 5 selfloop flow, removed 2 redundant places. [2024-11-12 08:27:13,472 INFO L231 Difference]: Finished difference. Result has 71 places, 78 transitions, 587 flow [2024-11-12 08:27:13,472 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=488, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=74, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=587, PETRI_PLACES=71, PETRI_TRANSITIONS=78} [2024-11-12 08:27:13,473 INFO L279 CegarLoopForPetriNet]: 23 programPoint places, 48 predicate places. [2024-11-12 08:27:13,473 INFO L471 AbstractCegarLoop]: Abstraction has has 71 places, 78 transitions, 587 flow [2024-11-12 08:27:13,473 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 5.428571428571429) internal successors, (38), 7 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-12 08:27:13,473 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-12 08:27:13,474 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-12 08:27:13,495 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-11-12 08:27:13,677 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 [2024-11-12 08:27:13,678 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-12 08:27:13,678 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 08:27:13,678 INFO L85 PathProgramCache]: Analyzing trace with hash 644219255, now seen corresponding path program 5 times [2024-11-12 08:27:13,678 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 08:27:13,679 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [454701147] [2024-11-12 08:27:13,679 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 08:27:13,679 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 08:27:13,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 08:27:13,968 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-12 08:27:13,968 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-12 08:27:13,968 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [454701147] [2024-11-12 08:27:13,968 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [454701147] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-12 08:27:13,968 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [730670800] [2024-11-12 08:27:13,969 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-12 08:27:13,969 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-12 08:27:13,969 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-12 08:27:13,970 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-12 08:27:13,971 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-12 08:27:14,013 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-12 08:27:14,013 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-12 08:27:14,014 INFO L256 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-11-12 08:27:14,015 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-12 08:27:14,137 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-12 08:27:14,138 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-12 08:27:14,375 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-12 08:27:14,376 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [730670800] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-12 08:27:14,376 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-12 08:27:14,376 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 7] total 16 [2024-11-12 08:27:14,376 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1463408136] [2024-11-12 08:27:14,376 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-12 08:27:14,377 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-11-12 08:27:14,377 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-12 08:27:14,377 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-11-12 08:27:14,377 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=166, Unknown=0, NotChecked=0, Total=240 [2024-11-12 08:27:14,404 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 21 [2024-11-12 08:27:14,405 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 78 transitions, 587 flow. Second operand has 16 states, 16 states have (on average 6.375) internal successors, (102), 16 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-12 08:27:14,405 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-12 08:27:14,405 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 21 [2024-11-12 08:27:14,405 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-12 08:27:15,423 INFO L124 PetriNetUnfolderBase]: 1133/1965 cut-off events. [2024-11-12 08:27:15,423 INFO L125 PetriNetUnfolderBase]: For 7049/7055 co-relation queries the response was YES. [2024-11-12 08:27:15,430 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7473 conditions, 1965 events. 1133/1965 cut-off events. For 7049/7055 co-relation queries the response was YES. Maximal size of possible extension queue 88. Compared 9965 event pairs, 19 based on Foata normal form. 26/1989 useless extension candidates. Maximal degree in co-relation 6662. Up to 428 conditions per place. [2024-11-12 08:27:15,439 INFO L140 encePairwiseOnDemand]: 12/21 looper letters, 109 selfloop transitions, 150 changer transitions 23/303 dead transitions. [2024-11-12 08:27:15,440 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 95 places, 303 transitions, 2654 flow [2024-11-12 08:27:15,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2024-11-12 08:27:15,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2024-11-12 08:27:15,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 249 transitions. [2024-11-12 08:27:15,442 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4742857142857143 [2024-11-12 08:27:15,442 INFO L175 Difference]: Start difference. First operand has 71 places, 78 transitions, 587 flow. Second operand 25 states and 249 transitions. [2024-11-12 08:27:15,442 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 95 places, 303 transitions, 2654 flow [2024-11-12 08:27:15,457 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 89 places, 303 transitions, 2564 flow, removed 12 selfloop flow, removed 6 redundant places. [2024-11-12 08:27:15,463 INFO L231 Difference]: Finished difference. Result has 100 places, 199 transitions, 1936 flow [2024-11-12 08:27:15,463 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=551, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=78, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=25, PETRI_FLOW=1936, PETRI_PLACES=100, PETRI_TRANSITIONS=199} [2024-11-12 08:27:15,463 INFO L279 CegarLoopForPetriNet]: 23 programPoint places, 77 predicate places. [2024-11-12 08:27:15,464 INFO L471 AbstractCegarLoop]: Abstraction has has 100 places, 199 transitions, 1936 flow [2024-11-12 08:27:15,464 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 6.375) internal successors, (102), 16 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-12 08:27:15,464 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-12 08:27:15,464 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-12 08:27:15,479 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2024-11-12 08:27:15,665 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 [2024-11-12 08:27:15,665 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-12 08:27:15,665 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 08:27:15,665 INFO L85 PathProgramCache]: Analyzing trace with hash 771752695, now seen corresponding path program 6 times [2024-11-12 08:27:15,665 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 08:27:15,666 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [112080335] [2024-11-12 08:27:15,666 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 08:27:15,666 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 08:27:15,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 08:27:15,810 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-12 08:27:15,811 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-12 08:27:15,811 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [112080335] [2024-11-12 08:27:15,811 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [112080335] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-12 08:27:15,811 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1129589503] [2024-11-12 08:27:15,811 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-12 08:27:15,811 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-12 08:27:15,811 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-12 08:27:15,817 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-12 08:27:15,821 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-11-12 08:27:15,866 INFO L229 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2024-11-12 08:27:15,866 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-12 08:27:15,868 INFO L256 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-11-12 08:27:15,869 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-12 08:27:15,968 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-12 08:27:15,969 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-12 08:27:16,132 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-12 08:27:16,132 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1129589503] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-12 08:27:16,132 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-12 08:27:16,133 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 7] total 16 [2024-11-12 08:27:16,133 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2114253100] [2024-11-12 08:27:16,133 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-12 08:27:16,133 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-11-12 08:27:16,134 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-12 08:27:16,134 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-11-12 08:27:16,134 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=165, Unknown=0, NotChecked=0, Total=240 [2024-11-12 08:27:16,142 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 21 [2024-11-12 08:27:16,142 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 100 places, 199 transitions, 1936 flow. Second operand has 16 states, 16 states have (on average 6.0) internal successors, (96), 16 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-12 08:27:16,142 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-12 08:27:16,142 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 21 [2024-11-12 08:27:16,143 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-12 08:27:16,594 INFO L124 PetriNetUnfolderBase]: 1492/2579 cut-off events. [2024-11-12 08:27:16,594 INFO L125 PetriNetUnfolderBase]: For 16520/16538 co-relation queries the response was YES. [2024-11-12 08:27:16,600 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12541 conditions, 2579 events. 1492/2579 cut-off events. For 16520/16538 co-relation queries the response was YES. Maximal size of possible extension queue 126. Compared 14042 event pairs, 143 based on Foata normal form. 12/2585 useless extension candidates. Maximal degree in co-relation 11267. Up to 844 conditions per place. [2024-11-12 08:27:16,611 INFO L140 encePairwiseOnDemand]: 13/21 looper letters, 163 selfloop transitions, 234 changer transitions 6/424 dead transitions. [2024-11-12 08:27:16,611 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 115 places, 424 transitions, 5015 flow [2024-11-12 08:27:16,612 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-11-12 08:27:16,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2024-11-12 08:27:16,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 151 transitions. [2024-11-12 08:27:16,612 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4494047619047619 [2024-11-12 08:27:16,612 INFO L175 Difference]: Start difference. First operand has 100 places, 199 transitions, 1936 flow. Second operand 16 states and 151 transitions. [2024-11-12 08:27:16,612 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 115 places, 424 transitions, 5015 flow [2024-11-12 08:27:16,667 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 111 places, 424 transitions, 4703 flow, removed 144 selfloop flow, removed 4 redundant places. [2024-11-12 08:27:16,674 INFO L231 Difference]: Finished difference. Result has 121 places, 346 transitions, 4345 flow [2024-11-12 08:27:16,674 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=1786, PETRI_DIFFERENCE_MINUEND_PLACES=96, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=199, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=97, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=4345, PETRI_PLACES=121, PETRI_TRANSITIONS=346} [2024-11-12 08:27:16,675 INFO L279 CegarLoopForPetriNet]: 23 programPoint places, 98 predicate places. [2024-11-12 08:27:16,675 INFO L471 AbstractCegarLoop]: Abstraction has has 121 places, 346 transitions, 4345 flow [2024-11-12 08:27:16,675 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 6.0) internal successors, (96), 16 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-12 08:27:16,675 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-12 08:27:16,675 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-12 08:27:16,688 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2024-11-12 08:27:16,879 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 [2024-11-12 08:27:16,880 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-12 08:27:16,881 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 08:27:16,881 INFO L85 PathProgramCache]: Analyzing trace with hash 290146805, now seen corresponding path program 7 times [2024-11-12 08:27:16,881 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 08:27:16,881 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [907597379] [2024-11-12 08:27:16,881 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 08:27:16,881 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 08:27:16,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 08:27:17,036 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-12 08:27:17,036 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-12 08:27:17,036 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [907597379] [2024-11-12 08:27:17,036 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [907597379] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-12 08:27:17,036 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2112689716] [2024-11-12 08:27:17,036 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-12 08:27:17,037 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-12 08:27:17,037 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-12 08:27:17,038 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-12 08:27:17,043 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-11-12 08:27:17,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 08:27:17,078 INFO L256 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-11-12 08:27:17,079 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-12 08:27:17,181 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-12 08:27:17,181 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-12 08:27:17,304 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-12 08:27:17,305 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2112689716] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-12 08:27:17,305 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-12 08:27:17,305 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 8] total 19 [2024-11-12 08:27:17,305 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [584890702] [2024-11-12 08:27:17,305 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-12 08:27:17,305 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-11-12 08:27:17,306 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-12 08:27:17,306 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-11-12 08:27:17,306 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=273, Unknown=0, NotChecked=0, Total=342 [2024-11-12 08:27:17,318 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 21 [2024-11-12 08:27:17,319 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 121 places, 346 transitions, 4345 flow. Second operand has 19 states, 19 states have (on average 5.7894736842105265) internal successors, (110), 19 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-12 08:27:17,319 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-12 08:27:17,319 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 21 [2024-11-12 08:27:17,319 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-12 08:27:18,699 INFO L124 PetriNetUnfolderBase]: 2213/3701 cut-off events. [2024-11-12 08:27:18,700 INFO L125 PetriNetUnfolderBase]: For 33593/33593 co-relation queries the response was YES. [2024-11-12 08:27:18,714 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21078 conditions, 3701 events. 2213/3701 cut-off events. For 33593/33593 co-relation queries the response was YES. Maximal size of possible extension queue 177. Compared 20730 event pairs, 52 based on Foata normal form. 60/3761 useless extension candidates. Maximal degree in co-relation 19882. Up to 891 conditions per place. [2024-11-12 08:27:18,825 INFO L140 encePairwiseOnDemand]: 11/21 looper letters, 232 selfloop transitions, 530 changer transitions 1/764 dead transitions. [2024-11-12 08:27:18,825 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 156 places, 764 transitions, 10527 flow [2024-11-12 08:27:18,825 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2024-11-12 08:27:18,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2024-11-12 08:27:18,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 332 transitions. [2024-11-12 08:27:18,826 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.41604010025062654 [2024-11-12 08:27:18,826 INFO L175 Difference]: Start difference. First operand has 121 places, 346 transitions, 4345 flow. Second operand 38 states and 332 transitions. [2024-11-12 08:27:18,827 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 156 places, 764 transitions, 10527 flow [2024-11-12 08:27:18,944 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 152 places, 764 transitions, 10155 flow, removed 172 selfloop flow, removed 4 redundant places. [2024-11-12 08:27:18,954 INFO L231 Difference]: Finished difference. Result has 174 places, 639 transitions, 9556 flow [2024-11-12 08:27:18,954 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=4219, PETRI_DIFFERENCE_MINUEND_PLACES=115, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=346, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=257, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=38, PETRI_FLOW=9556, PETRI_PLACES=174, PETRI_TRANSITIONS=639} [2024-11-12 08:27:18,955 INFO L279 CegarLoopForPetriNet]: 23 programPoint places, 151 predicate places. [2024-11-12 08:27:18,955 INFO L471 AbstractCegarLoop]: Abstraction has has 174 places, 639 transitions, 9556 flow [2024-11-12 08:27:18,955 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 5.7894736842105265) internal successors, (110), 19 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-12 08:27:18,955 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-12 08:27:18,955 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-12 08:27:18,972 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2024-11-12 08:27:19,159 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 [2024-11-12 08:27:19,160 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-12 08:27:19,160 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 08:27:19,161 INFO L85 PathProgramCache]: Analyzing trace with hash 1329935501, now seen corresponding path program 8 times [2024-11-12 08:27:19,161 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 08:27:19,161 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [416705588] [2024-11-12 08:27:19,161 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 08:27:19,161 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 08:27:19,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 08:27:19,276 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-12 08:27:19,276 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-12 08:27:19,276 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [416705588] [2024-11-12 08:27:19,276 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [416705588] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-12 08:27:19,277 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1542578458] [2024-11-12 08:27:19,277 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-12 08:27:19,277 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-12 08:27:19,277 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-12 08:27:19,282 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-12 08:27:19,297 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-11-12 08:27:19,331 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-12 08:27:19,332 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-12 08:27:19,332 INFO L256 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-11-12 08:27:19,333 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-12 08:27:19,511 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-12 08:27:19,511 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-12 08:27:19,688 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-12 08:27:19,688 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1542578458] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-12 08:27:19,688 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-12 08:27:19,689 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 17 [2024-11-12 08:27:19,689 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [674816216] [2024-11-12 08:27:19,689 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-12 08:27:19,692 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-11-12 08:27:19,692 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-12 08:27:19,693 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-11-12 08:27:19,693 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=200, Unknown=0, NotChecked=0, Total=272 [2024-11-12 08:27:19,698 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 21 [2024-11-12 08:27:19,698 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 174 places, 639 transitions, 9556 flow. Second operand has 17 states, 17 states have (on average 6.0) internal successors, (102), 17 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-12 08:27:19,698 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-12 08:27:19,698 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 21 [2024-11-12 08:27:19,698 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-12 08:27:21,676 INFO L124 PetriNetUnfolderBase]: 2635/4587 cut-off events. [2024-11-12 08:27:21,676 INFO L125 PetriNetUnfolderBase]: For 75428/75448 co-relation queries the response was YES. [2024-11-12 08:27:21,698 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30819 conditions, 4587 events. 2635/4587 cut-off events. For 75428/75448 co-relation queries the response was YES. Maximal size of possible extension queue 253. Compared 28703 event pairs, 69 based on Foata normal form. 52/4633 useless extension candidates. Maximal degree in co-relation 28917. Up to 1127 conditions per place. [2024-11-12 08:27:21,741 INFO L140 encePairwiseOnDemand]: 13/21 looper letters, 206 selfloop transitions, 760 changer transitions 1/998 dead transitions. [2024-11-12 08:27:21,741 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 205 places, 998 transitions, 16250 flow [2024-11-12 08:27:21,742 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2024-11-12 08:27:21,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2024-11-12 08:27:21,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 307 transitions. [2024-11-12 08:27:21,743 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4568452380952381 [2024-11-12 08:27:21,743 INFO L175 Difference]: Start difference. First operand has 174 places, 639 transitions, 9556 flow. Second operand 32 states and 307 transitions. [2024-11-12 08:27:21,743 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 205 places, 998 transitions, 16250 flow [2024-11-12 08:27:22,240 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 200 places, 998 transitions, 15561 flow, removed 333 selfloop flow, removed 5 redundant places. [2024-11-12 08:27:22,254 INFO L231 Difference]: Finished difference. Result has 218 places, 896 transitions, 15610 flow [2024-11-12 08:27:22,255 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=9107, PETRI_DIFFERENCE_MINUEND_PLACES=169, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=639, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=521, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=32, PETRI_FLOW=15610, PETRI_PLACES=218, PETRI_TRANSITIONS=896} [2024-11-12 08:27:22,256 INFO L279 CegarLoopForPetriNet]: 23 programPoint places, 195 predicate places. [2024-11-12 08:27:22,256 INFO L471 AbstractCegarLoop]: Abstraction has has 218 places, 896 transitions, 15610 flow [2024-11-12 08:27:22,256 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 6.0) internal successors, (102), 17 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-12 08:27:22,256 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-12 08:27:22,256 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-12 08:27:22,268 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2024-11-12 08:27:22,456 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 [2024-11-12 08:27:22,457 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-12 08:27:22,458 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 08:27:22,458 INFO L85 PathProgramCache]: Analyzing trace with hash -1088901193, now seen corresponding path program 9 times [2024-11-12 08:27:22,458 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 08:27:22,459 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1257745287] [2024-11-12 08:27:22,459 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 08:27:22,459 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 08:27:22,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 08:27:22,600 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-12 08:27:22,601 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-12 08:27:22,601 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1257745287] [2024-11-12 08:27:22,601 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1257745287] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-12 08:27:22,601 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [95971515] [2024-11-12 08:27:22,601 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-12 08:27:22,601 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-12 08:27:22,601 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-12 08:27:22,603 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-12 08:27:22,604 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-11-12 08:27:22,644 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-11-12 08:27:22,644 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-12 08:27:22,646 INFO L256 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-11-12 08:27:22,647 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-12 08:27:22,804 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-12 08:27:22,804 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-12 08:27:22,922 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-12 08:27:22,923 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [95971515] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-12 08:27:22,923 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-12 08:27:22,923 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 7] total 15 [2024-11-12 08:27:22,923 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1141668681] [2024-11-12 08:27:22,923 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-12 08:27:22,924 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-11-12 08:27:22,924 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-12 08:27:22,925 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-11-12 08:27:22,925 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=149, Unknown=0, NotChecked=0, Total=210 [2024-11-12 08:27:22,934 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 21 [2024-11-12 08:27:22,935 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 218 places, 896 transitions, 15610 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) [2024-11-12 08:27:22,935 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-12 08:27:22,935 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 21 [2024-11-12 08:27:22,935 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-12 08:27:24,680 INFO L124 PetriNetUnfolderBase]: 2644/4559 cut-off events. [2024-11-12 08:27:24,680 INFO L125 PetriNetUnfolderBase]: For 87836/87878 co-relation queries the response was YES. [2024-11-12 08:27:24,700 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35490 conditions, 4559 events. 2644/4559 cut-off events. For 87836/87878 co-relation queries the response was YES. Maximal size of possible extension queue 250. Compared 28384 event pairs, 143 based on Foata normal form. 8/4559 useless extension candidates. Maximal degree in co-relation 33745. Up to 1142 conditions per place. [2024-11-12 08:27:24,720 INFO L140 encePairwiseOnDemand]: 12/21 looper letters, 269 selfloop transitions, 650 changer transitions 4/954 dead transitions. [2024-11-12 08:27:24,721 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 236 places, 954 transitions, 18229 flow [2024-11-12 08:27:24,721 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2024-11-12 08:27:24,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2024-11-12 08:27:24,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 192 transitions. [2024-11-12 08:27:24,722 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.45714285714285713 [2024-11-12 08:27:24,722 INFO L175 Difference]: Start difference. First operand has 218 places, 896 transitions, 15610 flow. Second operand 20 states and 192 transitions. [2024-11-12 08:27:24,722 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 236 places, 954 transitions, 18229 flow [2024-11-12 08:27:25,562 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 232 places, 954 transitions, 17957 flow, removed 117 selfloop flow, removed 4 redundant places. [2024-11-12 08:27:25,576 INFO L231 Difference]: Finished difference. Result has 235 places, 902 transitions, 17374 flow [2024-11-12 08:27:25,577 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=15268, PETRI_DIFFERENCE_MINUEND_PLACES=213, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=891, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=638, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=248, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=17374, PETRI_PLACES=235, PETRI_TRANSITIONS=902} [2024-11-12 08:27:25,578 INFO L279 CegarLoopForPetriNet]: 23 programPoint places, 212 predicate places. [2024-11-12 08:27:25,578 INFO L471 AbstractCegarLoop]: Abstraction has has 235 places, 902 transitions, 17374 flow [2024-11-12 08:27:25,578 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) [2024-11-12 08:27:25,578 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-12 08:27:25,578 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-12 08:27:25,592 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2024-11-12 08:27:25,782 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 [2024-11-12 08:27:25,783 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-12 08:27:25,783 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 08:27:25,783 INFO L85 PathProgramCache]: Analyzing trace with hash -1941382793, now seen corresponding path program 10 times [2024-11-12 08:27:25,783 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 08:27:25,783 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1571567989] [2024-11-12 08:27:25,783 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 08:27:25,783 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 08:27:25,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 08:27:25,988 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-12 08:27:25,988 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-12 08:27:25,988 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1571567989] [2024-11-12 08:27:25,988 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1571567989] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-12 08:27:25,988 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1716141528] [2024-11-12 08:27:25,988 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-12 08:27:25,989 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-12 08:27:25,989 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-12 08:27:25,992 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-12 08:27:25,995 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-11-12 08:27:26,035 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-12 08:27:26,035 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-12 08:27:26,036 INFO L256 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-11-12 08:27:26,037 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-12 08:27:26,126 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-12 08:27:26,126 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-12 08:27:26,255 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-12 08:27:26,255 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1716141528] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-12 08:27:26,256 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-12 08:27:26,256 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 17 [2024-11-12 08:27:26,256 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1413822598] [2024-11-12 08:27:26,256 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-12 08:27:26,256 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-11-12 08:27:26,256 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-12 08:27:26,257 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-11-12 08:27:26,257 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=194, Unknown=0, NotChecked=0, Total=272 [2024-11-12 08:27:26,260 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 21 [2024-11-12 08:27:26,260 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 235 places, 902 transitions, 17374 flow. Second operand has 17 states, 17 states have (on average 6.0) internal successors, (102), 17 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-12 08:27:26,260 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-12 08:27:26,260 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 21 [2024-11-12 08:27:26,260 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-12 08:27:28,425 INFO L124 PetriNetUnfolderBase]: 3123/5419 cut-off events. [2024-11-12 08:27:28,425 INFO L125 PetriNetUnfolderBase]: For 136299/136321 co-relation queries the response was YES. [2024-11-12 08:27:28,453 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45850 conditions, 5419 events. 3123/5419 cut-off events. For 136299/136321 co-relation queries the response was YES. Maximal size of possible extension queue 311. Compared 35035 event pairs, 141 based on Foata normal form. 50/5467 useless extension candidates. Maximal degree in co-relation 43907. Up to 1300 conditions per place. [2024-11-12 08:27:28,477 INFO L140 encePairwiseOnDemand]: 13/21 looper letters, 278 selfloop transitions, 899 changer transitions 1/1209 dead transitions. [2024-11-12 08:27:28,477 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 255 places, 1209 transitions, 25353 flow [2024-11-12 08:27:28,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2024-11-12 08:27:28,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2024-11-12 08:27:28,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 230 transitions. [2024-11-12 08:27:28,478 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.47619047619047616 [2024-11-12 08:27:28,479 INFO L175 Difference]: Start difference. First operand has 235 places, 902 transitions, 17374 flow. Second operand 23 states and 230 transitions. [2024-11-12 08:27:28,479 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 255 places, 1209 transitions, 25353 flow [2024-11-12 08:27:29,802 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 247 places, 1209 transitions, 25096 flow, removed 60 selfloop flow, removed 8 redundant places. [2024-11-12 08:27:29,825 INFO L231 Difference]: Finished difference. Result has 260 places, 1120 transitions, 25303 flow [2024-11-12 08:27:29,826 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=17181, PETRI_DIFFERENCE_MINUEND_PLACES=225, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=902, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=700, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=128, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=25303, PETRI_PLACES=260, PETRI_TRANSITIONS=1120} [2024-11-12 08:27:29,826 INFO L279 CegarLoopForPetriNet]: 23 programPoint places, 237 predicate places. [2024-11-12 08:27:29,827 INFO L471 AbstractCegarLoop]: Abstraction has has 260 places, 1120 transitions, 25303 flow [2024-11-12 08:27:29,827 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 6.0) internal successors, (102), 17 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-12 08:27:29,827 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-12 08:27:29,827 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-12 08:27:29,839 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2024-11-12 08:27:30,031 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 [2024-11-12 08:27:30,032 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-12 08:27:30,032 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 08:27:30,032 INFO L85 PathProgramCache]: Analyzing trace with hash -1629823497, now seen corresponding path program 11 times [2024-11-12 08:27:30,032 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 08:27:30,032 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1307319669] [2024-11-12 08:27:30,032 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 08:27:30,033 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 08:27:30,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 08:27:30,205 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-12 08:27:30,205 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-12 08:27:30,205 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1307319669] [2024-11-12 08:27:30,206 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1307319669] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-12 08:27:30,206 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [576607226] [2024-11-12 08:27:30,206 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-12 08:27:30,206 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-12 08:27:30,206 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-12 08:27:30,208 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-12 08:27:30,209 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-11-12 08:27:30,248 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-12 08:27:30,248 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-12 08:27:30,249 INFO L256 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-11-12 08:27:30,250 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-12 08:27:30,345 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-12 08:27:30,345 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-12 08:27:30,504 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-12 08:27:30,505 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [576607226] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-12 08:27:30,505 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-12 08:27:30,505 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 8] total 19 [2024-11-12 08:27:30,505 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [680380102] [2024-11-12 08:27:30,505 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-12 08:27:30,506 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-11-12 08:27:30,507 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-12 08:27:30,507 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-11-12 08:27:30,508 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=269, Unknown=0, NotChecked=0, Total=342 [2024-11-12 08:27:30,526 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 21 [2024-11-12 08:27:30,526 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 260 places, 1120 transitions, 25303 flow. Second operand has 19 states, 19 states have (on average 5.684210526315789) internal successors, (108), 19 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-12 08:27:30,526 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-12 08:27:30,527 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 21 [2024-11-12 08:27:30,527 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-12 08:27:34,901 INFO L124 PetriNetUnfolderBase]: 5117/8605 cut-off events. [2024-11-12 08:27:34,901 INFO L125 PetriNetUnfolderBase]: For 287006/287006 co-relation queries the response was YES. [2024-11-12 08:27:34,955 INFO L83 FinitePrefix]: Finished finitePrefix Result has 82373 conditions, 8605 events. 5117/8605 cut-off events. For 287006/287006 co-relation queries the response was YES. Maximal size of possible extension queue 470. Compared 57669 event pairs, 98 based on Foata normal form. 138/8743 useless extension candidates. Maximal degree in co-relation 81402. Up to 2084 conditions per place. [2024-11-12 08:27:34,995 INFO L140 encePairwiseOnDemand]: 10/21 looper letters, 576 selfloop transitions, 1517 changer transitions 7/2101 dead transitions. [2024-11-12 08:27:34,996 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 306 places, 2101 transitions, 50260 flow [2024-11-12 08:27:34,996 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2024-11-12 08:27:34,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2024-11-12 08:27:35,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 403 transitions. [2024-11-12 08:27:35,001 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4083080040526849 [2024-11-12 08:27:35,002 INFO L175 Difference]: Start difference. First operand has 260 places, 1120 transitions, 25303 flow. Second operand 47 states and 403 transitions. [2024-11-12 08:27:35,002 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 306 places, 2101 transitions, 50260 flow [2024-11-12 08:27:38,514 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 297 places, 2101 transitions, 49776 flow, removed 155 selfloop flow, removed 9 redundant places. [2024-11-12 08:27:38,550 INFO L231 Difference]: Finished difference. Result has 319 places, 1900 transitions, 48741 flow [2024-11-12 08:27:38,551 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=24864, PETRI_DIFFERENCE_MINUEND_PLACES=251, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1117, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=839, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=195, PETRI_DIFFERENCE_SUBTRAHEND_STATES=47, PETRI_FLOW=48741, PETRI_PLACES=319, PETRI_TRANSITIONS=1900} [2024-11-12 08:27:38,552 INFO L279 CegarLoopForPetriNet]: 23 programPoint places, 296 predicate places. [2024-11-12 08:27:38,552 INFO L471 AbstractCegarLoop]: Abstraction has has 319 places, 1900 transitions, 48741 flow [2024-11-12 08:27:38,553 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 5.684210526315789) internal successors, (108), 19 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-12 08:27:38,553 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-12 08:27:38,553 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-12 08:27:38,566 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2024-11-12 08:27:38,753 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 [2024-11-12 08:27:38,754 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-12 08:27:38,755 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 08:27:38,755 INFO L85 PathProgramCache]: Analyzing trace with hash 233897117, now seen corresponding path program 12 times [2024-11-12 08:27:38,755 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 08:27:38,755 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [956720098] [2024-11-12 08:27:38,758 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 08:27:38,758 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 08:27:38,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 08:27:38,864 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-12 08:27:38,865 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-12 08:27:38,865 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [956720098] [2024-11-12 08:27:38,865 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [956720098] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-12 08:27:38,865 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [138079022] [2024-11-12 08:27:38,865 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-12 08:27:38,865 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-12 08:27:38,866 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-12 08:27:38,867 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-12 08:27:38,870 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-11-12 08:27:38,910 INFO L229 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2024-11-12 08:27:38,911 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-12 08:27:38,912 INFO L256 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-11-12 08:27:38,913 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-12 08:27:39,012 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-12 08:27:39,012 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-12 08:27:39,161 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-12 08:27:39,162 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [138079022] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-12 08:27:39,162 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-12 08:27:39,162 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 7] total 16 [2024-11-12 08:27:39,162 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [575405553] [2024-11-12 08:27:39,162 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-12 08:27:39,163 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-11-12 08:27:39,163 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-12 08:27:39,163 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-11-12 08:27:39,163 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=169, Unknown=0, NotChecked=0, Total=240 [2024-11-12 08:27:39,171 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 21 [2024-11-12 08:27:39,171 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 319 places, 1900 transitions, 48741 flow. Second operand has 16 states, 16 states have (on average 6.0) internal successors, (96), 16 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-12 08:27:39,172 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-12 08:27:39,172 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 21 [2024-11-12 08:27:39,172 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-12 08:27:43,541 INFO L124 PetriNetUnfolderBase]: 4801/8245 cut-off events. [2024-11-12 08:27:43,541 INFO L125 PetriNetUnfolderBase]: For 286530/286540 co-relation queries the response was YES. [2024-11-12 08:27:43,628 INFO L83 FinitePrefix]: Finished finitePrefix Result has 89261 conditions, 8245 events. 4801/8245 cut-off events. For 286530/286540 co-relation queries the response was YES. Maximal size of possible extension queue 464. Compared 56961 event pairs, 342 based on Foata normal form. 14/8259 useless extension candidates. Maximal degree in co-relation 88213. Up to 2402 conditions per place. [2024-11-12 08:27:43,693 INFO L140 encePairwiseOnDemand]: 13/21 looper letters, 315 selfloop transitions, 1579 changer transitions 5/1972 dead transitions. [2024-11-12 08:27:43,694 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 338 places, 1972 transitions, 53794 flow [2024-11-12 08:27:43,694 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2024-11-12 08:27:43,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2024-11-12 08:27:43,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 191 transitions. [2024-11-12 08:27:43,695 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.45476190476190476 [2024-11-12 08:27:43,695 INFO L175 Difference]: Start difference. First operand has 319 places, 1900 transitions, 48741 flow. Second operand 20 states and 191 transitions. [2024-11-12 08:27:43,695 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 338 places, 1972 transitions, 53794 flow [2024-11-12 08:27:50,046 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 328 places, 1972 transitions, 52501 flow, removed 598 selfloop flow, removed 10 redundant places. [2024-11-12 08:27:50,092 INFO L231 Difference]: Finished difference. Result has 331 places, 1916 transitions, 52422 flow [2024-11-12 08:27:50,094 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=47514, PETRI_DIFFERENCE_MINUEND_PLACES=309, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1898, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1559, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=325, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=52422, PETRI_PLACES=331, PETRI_TRANSITIONS=1916} [2024-11-12 08:27:50,095 INFO L279 CegarLoopForPetriNet]: 23 programPoint places, 308 predicate places. [2024-11-12 08:27:50,095 INFO L471 AbstractCegarLoop]: Abstraction has has 331 places, 1916 transitions, 52422 flow [2024-11-12 08:27:50,096 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 6.0) internal successors, (96), 16 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-12 08:27:50,096 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-12 08:27:50,096 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-12 08:27:50,108 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2024-11-12 08:27:50,296 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 [2024-11-12 08:27:50,297 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-12 08:27:50,298 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 08:27:50,298 INFO L85 PathProgramCache]: Analyzing trace with hash 108584379, now seen corresponding path program 13 times [2024-11-12 08:27:50,298 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 08:27:50,298 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1302628919] [2024-11-12 08:27:50,298 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 08:27:50,301 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 08:27:50,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 08:27:50,431 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-12 08:27:50,431 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-12 08:27:50,431 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1302628919] [2024-11-12 08:27:50,431 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1302628919] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-12 08:27:50,431 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-12 08:27:50,431 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-11-12 08:27:50,431 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [707037454] [2024-11-12 08:27:50,431 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-12 08:27:50,431 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-12 08:27:50,432 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-12 08:27:50,432 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-12 08:27:50,432 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-11-12 08:27:50,447 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 21 [2024-11-12 08:27:50,448 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 331 places, 1916 transitions, 52422 flow. Second operand has 7 states, 7 states have (on average 7.428571428571429) internal successors, (52), 7 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-12 08:27:50,448 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-12 08:27:50,448 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 21 [2024-11-12 08:27:50,448 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-12 08:27:53,622 INFO L124 PetriNetUnfolderBase]: 4394/7771 cut-off events. [2024-11-12 08:27:53,622 INFO L125 PetriNetUnfolderBase]: For 267234/267405 co-relation queries the response was YES. [2024-11-12 08:27:53,693 INFO L83 FinitePrefix]: Finished finitePrefix Result has 90659 conditions, 7771 events. 4394/7771 cut-off events. For 267234/267405 co-relation queries the response was YES. Maximal size of possible extension queue 460. Compared 55262 event pairs, 875 based on Foata normal form. 30/7691 useless extension candidates. Maximal degree in co-relation 89724. Up to 5213 conditions per place. [2024-11-12 08:27:53,741 INFO L140 encePairwiseOnDemand]: 15/21 looper letters, 1410 selfloop transitions, 181 changer transitions 4/1965 dead transitions. [2024-11-12 08:27:53,741 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 336 places, 1965 transitions, 56539 flow [2024-11-12 08:27:53,742 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-12 08:27:53,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-11-12 08:27:53,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 70 transitions. [2024-11-12 08:27:53,742 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.47619047619047616 [2024-11-12 08:27:53,742 INFO L175 Difference]: Start difference. First operand has 331 places, 1916 transitions, 52422 flow. Second operand 7 states and 70 transitions. [2024-11-12 08:27:53,742 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 336 places, 1965 transitions, 56539 flow [2024-11-12 08:28:00,096 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 321 places, 1965 transitions, 55849 flow, removed 137 selfloop flow, removed 15 redundant places. [2024-11-12 08:28:00,133 INFO L231 Difference]: Finished difference. Result has 325 places, 1926 transitions, 52368 flow [2024-11-12 08:28:00,135 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=51761, PETRI_DIFFERENCE_MINUEND_PLACES=315, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1916, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=172, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1736, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=52368, PETRI_PLACES=325, PETRI_TRANSITIONS=1926} [2024-11-12 08:28:00,136 INFO L279 CegarLoopForPetriNet]: 23 programPoint places, 302 predicate places. [2024-11-12 08:28:00,137 INFO L471 AbstractCegarLoop]: Abstraction has has 325 places, 1926 transitions, 52368 flow [2024-11-12 08:28:00,137 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 7.428571428571429) internal successors, (52), 7 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-12 08:28:00,137 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-12 08:28:00,137 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-12 08:28:00,137 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-11-12 08:28:00,137 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-12 08:28:00,138 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 08:28:00,138 INFO L85 PathProgramCache]: Analyzing trace with hash -1896478875, now seen corresponding path program 14 times [2024-11-12 08:28:00,138 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 08:28:00,138 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1196487899] [2024-11-12 08:28:00,138 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 08:28:00,138 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 08:28:00,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 08:28:00,282 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-12 08:28:00,282 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-12 08:28:00,282 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1196487899] [2024-11-12 08:28:00,282 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1196487899] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-12 08:28:00,282 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1569246751] [2024-11-12 08:28:00,283 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-12 08:28:00,283 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-12 08:28:00,283 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-12 08:28:00,284 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-12 08:28:00,285 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-11-12 08:28:00,322 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-12 08:28:00,322 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-12 08:28:00,322 INFO L256 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-11-12 08:28:00,323 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-12 08:28:00,402 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-12 08:28:00,402 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-12 08:28:00,558 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-12 08:28:00,558 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1569246751] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-12 08:28:00,558 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-12 08:28:00,559 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 8] total 19 [2024-11-12 08:28:00,559 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1108929455] [2024-11-12 08:28:00,559 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-12 08:28:00,559 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-11-12 08:28:00,559 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-12 08:28:00,559 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-11-12 08:28:00,559 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=252, Unknown=0, NotChecked=0, Total=342 [2024-11-12 08:28:00,565 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 21 [2024-11-12 08:28:00,566 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 325 places, 1926 transitions, 52368 flow. Second operand has 19 states, 19 states have (on average 6.052631578947368) internal successors, (115), 19 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-12 08:28:00,566 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-12 08:28:00,566 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 21 [2024-11-12 08:28:00,566 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-12 08:28:05,119 INFO L124 PetriNetUnfolderBase]: 5514/9466 cut-off events. [2024-11-12 08:28:05,119 INFO L125 PetriNetUnfolderBase]: For 323860/323940 co-relation queries the response was YES. [2024-11-12 08:28:05,207 INFO L83 FinitePrefix]: Finished finitePrefix Result has 107707 conditions, 9466 events. 5514/9466 cut-off events. For 323860/323940 co-relation queries the response was YES. Maximal size of possible extension queue 528. Compared 66549 event pairs, 526 based on Foata normal form. 64/9514 useless extension candidates. Maximal degree in co-relation 106549. Up to 3432 conditions per place. [2024-11-12 08:28:05,277 INFO L140 encePairwiseOnDemand]: 12/21 looper letters, 913 selfloop transitions, 1328 changer transitions 0/2314 dead transitions. [2024-11-12 08:28:05,277 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 344 places, 2314 transitions, 66851 flow [2024-11-12 08:28:05,278 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2024-11-12 08:28:05,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2024-11-12 08:28:05,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 209 transitions. [2024-11-12 08:28:05,278 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4523809523809524 [2024-11-12 08:28:05,279 INFO L175 Difference]: Start difference. First operand has 325 places, 1926 transitions, 52368 flow. Second operand 22 states and 209 transitions. [2024-11-12 08:28:05,279 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 344 places, 2314 transitions, 66851 flow [2024-11-12 08:28:12,974 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 340 places, 2314 transitions, 66605 flow, removed 10 selfloop flow, removed 4 redundant places. [2024-11-12 08:28:13,039 INFO L231 Difference]: Finished difference. Result has 355 places, 2185 transitions, 65071 flow [2024-11-12 08:28:13,041 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=52143, PETRI_DIFFERENCE_MINUEND_PLACES=319, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1926, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1096, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=724, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=65071, PETRI_PLACES=355, PETRI_TRANSITIONS=2185} [2024-11-12 08:28:13,041 INFO L279 CegarLoopForPetriNet]: 23 programPoint places, 332 predicate places. [2024-11-12 08:28:13,042 INFO L471 AbstractCegarLoop]: Abstraction has has 355 places, 2185 transitions, 65071 flow [2024-11-12 08:28:13,042 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 6.052631578947368) internal successors, (115), 19 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-12 08:28:13,042 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-12 08:28:13,042 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-12 08:28:13,055 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2024-11-12 08:28:13,246 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2024-11-12 08:28:13,247 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-12 08:28:13,247 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 08:28:13,247 INFO L85 PathProgramCache]: Analyzing trace with hash 799107805, now seen corresponding path program 15 times [2024-11-12 08:28:13,248 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 08:28:13,248 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1032596043] [2024-11-12 08:28:13,248 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 08:28:13,248 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 08:28:13,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 08:28:13,388 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-12 08:28:13,388 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-12 08:28:13,389 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1032596043] [2024-11-12 08:28:13,389 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1032596043] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-12 08:28:13,389 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1625700263] [2024-11-12 08:28:13,389 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-12 08:28:13,389 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-12 08:28:13,389 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-12 08:28:13,390 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-12 08:28:13,392 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2024-11-12 08:28:13,428 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-11-12 08:28:13,429 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-12 08:28:13,429 INFO L256 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-11-12 08:28:13,430 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-12 08:28:13,511 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-12 08:28:13,511 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-12 08:28:13,724 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-12 08:28:13,724 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1625700263] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-12 08:28:13,725 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-12 08:28:13,725 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 8] total 18 [2024-11-12 08:28:13,725 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1361164265] [2024-11-12 08:28:13,725 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-12 08:28:13,725 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-11-12 08:28:13,725 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-12 08:28:13,726 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-11-12 08:28:13,726 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=221, Unknown=0, NotChecked=0, Total=306 [2024-11-12 08:28:13,732 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 21 [2024-11-12 08:28:13,733 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 355 places, 2185 transitions, 65071 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) [2024-11-12 08:28:13,733 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-12 08:28:13,733 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 21 [2024-11-12 08:28:13,733 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-12 08:28:20,104 INFO L124 PetriNetUnfolderBase]: 5572/9546 cut-off events. [2024-11-12 08:28:20,105 INFO L125 PetriNetUnfolderBase]: For 378414/378518 co-relation queries the response was YES. [2024-11-12 08:28:20,168 INFO L83 FinitePrefix]: Finished finitePrefix Result has 117674 conditions, 9546 events. 5572/9546 cut-off events. For 378414/378518 co-relation queries the response was YES. Maximal size of possible extension queue 529. Compared 66965 event pairs, 642 based on Foata normal form. 12/9539 useless extension candidates. Maximal degree in co-relation 116415. Up to 4198 conditions per place. [2024-11-12 08:28:20,216 INFO L140 encePairwiseOnDemand]: 12/21 looper letters, 576 selfloop transitions, 1648 changer transitions 3/2300 dead transitions. [2024-11-12 08:28:20,216 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 371 places, 2300 transitions, 72226 flow [2024-11-12 08:28:20,217 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-11-12 08:28:20,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2024-11-12 08:28:20,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 157 transitions. [2024-11-12 08:28:20,220 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.43977591036414565 [2024-11-12 08:28:20,220 INFO L175 Difference]: Start difference. First operand has 355 places, 2185 transitions, 65071 flow. Second operand 17 states and 157 transitions. [2024-11-12 08:28:20,220 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 371 places, 2300 transitions, 72226 flow [2024-11-12 08:28:28,964 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 367 places, 2300 transitions, 71386 flow, removed 321 selfloop flow, removed 4 redundant places. [2024-11-12 08:28:29,013 INFO L231 Difference]: Finished difference. Result has 374 places, 2256 transitions, 72620 flow [2024-11-12 08:28:29,015 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=64275, PETRI_DIFFERENCE_MINUEND_PLACES=351, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2185, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1581, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=554, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=72620, PETRI_PLACES=374, PETRI_TRANSITIONS=2256} [2024-11-12 08:28:29,016 INFO L279 CegarLoopForPetriNet]: 23 programPoint places, 351 predicate places. [2024-11-12 08:28:29,016 INFO L471 AbstractCegarLoop]: Abstraction has has 374 places, 2256 transitions, 72620 flow [2024-11-12 08:28:29,016 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has 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) [2024-11-12 08:28:29,016 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-12 08:28:29,016 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-12 08:28:29,034 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2024-11-12 08:28:29,217 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-12 08:28:29,217 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-12 08:28:29,217 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 08:28:29,217 INFO L85 PathProgramCache]: Analyzing trace with hash -1742703991, now seen corresponding path program 16 times [2024-11-12 08:28:29,217 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 08:28:29,217 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [842664360] [2024-11-12 08:28:29,218 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 08:28:29,218 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 08:28:29,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 08:28:29,606 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-12 08:28:29,607 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-12 08:28:29,607 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [842664360] [2024-11-12 08:28:29,607 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [842664360] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-12 08:28:29,607 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1664250473] [2024-11-12 08:28:29,607 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-12 08:28:29,608 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-12 08:28:29,608 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-12 08:28:29,609 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-12 08:28:29,617 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2024-11-12 08:28:29,656 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-12 08:28:29,656 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-12 08:28:29,658 INFO L256 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 13 conjuncts are in the unsatisfiable core [2024-11-12 08:28:29,659 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-12 08:28:29,832 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-12 08:28:29,832 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-12 08:28:30,155 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-12 08:28:30,155 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1664250473] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-12 08:28:30,155 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-12 08:28:30,155 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 6, 7] total 21 [2024-11-12 08:28:30,156 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1642634988] [2024-11-12 08:28:30,156 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-12 08:28:30,156 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2024-11-12 08:28:30,156 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-12 08:28:30,156 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2024-11-12 08:28:30,157 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=364, Unknown=0, NotChecked=0, Total=462 [2024-11-12 08:28:30,193 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 21 [2024-11-12 08:28:30,193 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 374 places, 2256 transitions, 72620 flow. Second operand has 22 states, 22 states have (on average 5.7727272727272725) internal successors, (127), 22 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-12 08:28:30,193 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-12 08:28:30,193 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 21 [2024-11-12 08:28:30,194 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-12 08:28:42,821 INFO L124 PetriNetUnfolderBase]: 6156/10309 cut-off events. [2024-11-12 08:28:42,822 INFO L125 PetriNetUnfolderBase]: For 441637/441637 co-relation queries the response was YES. [2024-11-12 08:28:42,953 INFO L83 FinitePrefix]: Finished finitePrefix Result has 133489 conditions, 10309 events. 6156/10309 cut-off events. For 441637/441637 co-relation queries the response was YES. Maximal size of possible extension queue 541. Compared 70055 event pairs, 53 based on Foata normal form. 55/10364 useless extension candidates. Maximal degree in co-relation 132990. Up to 3709 conditions per place. [2024-11-12 08:28:43,017 INFO L140 encePairwiseOnDemand]: 11/21 looper letters, 1304 selfloop transitions, 1213 changer transitions 146/2664 dead transitions. [2024-11-12 08:28:43,017 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 406 places, 2664 transitions, 88921 flow [2024-11-12 08:28:43,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2024-11-12 08:28:43,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2024-11-12 08:28:43,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 289 transitions. [2024-11-12 08:28:43,019 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.40476190476190477 [2024-11-12 08:28:43,019 INFO L175 Difference]: Start difference. First operand has 374 places, 2256 transitions, 72620 flow. Second operand 34 states and 289 transitions. [2024-11-12 08:28:43,019 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 406 places, 2664 transitions, 88921 flow