./Ultimate.py --spec /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/properties/unreach-call.prp --file /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/popl20-more-nonblocking-counter-alt2.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 84cfde4a Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/popl20-more-nonblocking-counter-alt2.wvr.c -s /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate-clean/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-dev-84cfde4 [2024-10-11 14:33:46,409 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-10-11 14:33:46,478 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-10-11 14:33:46,484 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-10-11 14:33:46,484 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-10-11 14:33:46,508 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-10-11 14:33:46,509 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-10-11 14:33:46,509 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-10-11 14:33:46,510 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-10-11 14:33:46,510 INFO L153 SettingsManager]: * Use memory slicer=true [2024-10-11 14:33:46,511 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-10-11 14:33:46,511 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-10-11 14:33:46,512 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-10-11 14:33:46,512 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-10-11 14:33:46,513 INFO L153 SettingsManager]: * Use SBE=true [2024-10-11 14:33:46,513 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-10-11 14:33:46,513 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-10-11 14:33:46,514 INFO L153 SettingsManager]: * sizeof long=4 [2024-10-11 14:33:46,514 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-10-11 14:33:46,514 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-10-11 14:33:46,515 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-10-11 14:33:46,515 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-10-11 14:33:46,516 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-10-11 14:33:46,516 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-10-11 14:33:46,516 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-10-11 14:33:46,517 INFO L153 SettingsManager]: * sizeof long double=12 [2024-10-11 14:33:46,517 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-10-11 14:33:46,517 INFO L153 SettingsManager]: * Use constant arrays=true [2024-10-11 14:33:46,518 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-10-11 14:33:46,518 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-10-11 14:33:46,518 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-10-11 14:33:46,519 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-10-11 14:33:46,519 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-11 14:33:46,519 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-10-11 14:33:46,520 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-10-11 14:33:46,520 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-10-11 14:33:46,520 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-10-11 14:33:46,520 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-10-11 14:33:46,521 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-10-11 14:33:46,521 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-10-11 14:33:46,521 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-10-11 14:33:46,522 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-10-11 14:33:46,522 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-clean/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 87e1a1d3acb3ee9b7a4a97eb7b14df31d5b38b7566b1218cea0dabfe5ec8ddbd [2024-10-11 14:33:46,772 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-10-11 14:33:46,791 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-10-11 14:33:46,793 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-10-11 14:33:46,795 INFO L270 PluginConnector]: Initializing CDTParser... [2024-10-11 14:33:46,795 INFO L274 PluginConnector]: CDTParser initialized [2024-10-11 14:33:46,796 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/popl20-more-nonblocking-counter-alt2.wvr.c [2024-10-11 14:33:48,192 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-10-11 14:33:48,381 INFO L384 CDTParser]: Found 1 translation units. [2024-10-11 14:33:48,382 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/popl20-more-nonblocking-counter-alt2.wvr.c [2024-10-11 14:33:48,390 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/data/5b578ffd1/68b849d32e284042873fff853fab5174/FLAG7e59c6560 [2024-10-11 14:33:48,404 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/data/5b578ffd1/68b849d32e284042873fff853fab5174 [2024-10-11 14:33:48,406 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-10-11 14:33:48,408 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-10-11 14:33:48,409 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-10-11 14:33:48,409 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-10-11 14:33:48,417 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-10-11 14:33:48,417 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.10 02:33:48" (1/1) ... [2024-10-11 14:33:48,420 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7638999b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:33:48, skipping insertion in model container [2024-10-11 14:33:48,420 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.10 02:33:48" (1/1) ... [2024-10-11 14:33:48,439 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-10-11 14:33:48,656 WARN L248 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/popl20-more-nonblocking-counter-alt2.wvr.c[2173,2186] [2024-10-11 14:33:48,660 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-11 14:33:48,668 INFO L200 MainTranslator]: Completed pre-run [2024-10-11 14:33:48,687 WARN L248 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/popl20-more-nonblocking-counter-alt2.wvr.c[2173,2186] [2024-10-11 14:33:48,688 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-11 14:33:48,704 INFO L204 MainTranslator]: Completed translation [2024-10-11 14:33:48,705 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:33:48 WrapperNode [2024-10-11 14:33:48,705 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-10-11 14:33:48,706 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-10-11 14:33:48,707 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-10-11 14:33:48,707 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-10-11 14:33:48,713 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:33:48" (1/1) ... [2024-10-11 14:33:48,720 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:33:48" (1/1) ... [2024-10-11 14:33:48,732 INFO L138 Inliner]: procedures = 20, calls = 14, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 44 [2024-10-11 14:33:48,733 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-10-11 14:33:48,733 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-10-11 14:33:48,733 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-10-11 14:33:48,734 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-10-11 14:33:48,742 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:33:48" (1/1) ... [2024-10-11 14:33:48,743 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:33:48" (1/1) ... [2024-10-11 14:33:48,744 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:33:48" (1/1) ... [2024-10-11 14:33:48,756 INFO L175 MemorySlicer]: Split 2 memory accesses to 1 slices as follows [2]. 100 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2]. The 0 writes are split as follows [0]. [2024-10-11 14:33:48,756 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:33:48" (1/1) ... [2024-10-11 14:33:48,757 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:33:48" (1/1) ... [2024-10-11 14:33:48,760 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:33:48" (1/1) ... [2024-10-11 14:33:48,763 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:33:48" (1/1) ... [2024-10-11 14:33:48,764 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:33:48" (1/1) ... [2024-10-11 14:33:48,765 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:33:48" (1/1) ... [2024-10-11 14:33:48,767 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-10-11 14:33:48,768 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-10-11 14:33:48,768 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-10-11 14:33:48,768 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-10-11 14:33:48,769 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:33:48" (1/1) ... [2024-10-11 14:33:48,775 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-11 14:33:48,786 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 14:33:48,806 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-10-11 14:33:48,808 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-10-11 14:33:48,845 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-10-11 14:33:48,845 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2024-10-11 14:33:48,846 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2024-10-11 14:33:48,846 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2024-10-11 14:33:48,846 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2024-10-11 14:33:48,846 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-10-11 14:33:48,846 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-10-11 14:33:48,846 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-10-11 14:33:48,846 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-10-11 14:33:48,847 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-10-11 14:33:48,848 WARN L207 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2024-10-11 14:33:48,918 INFO L238 CfgBuilder]: Building ICFG [2024-10-11 14:33:48,919 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-10-11 14:33:49,067 INFO L283 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2024-10-11 14:33:49,068 INFO L287 CfgBuilder]: Performing block encoding [2024-10-11 14:33:49,224 INFO L309 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-10-11 14:33:49,224 INFO L314 CfgBuilder]: Removed 2 assume(true) statements. [2024-10-11 14:33:49,225 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.10 02:33:49 BoogieIcfgContainer [2024-10-11 14:33:49,225 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-10-11 14:33:49,228 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-10-11 14:33:49,228 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-10-11 14:33:49,231 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-10-11 14:33:49,231 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 11.10 02:33:48" (1/3) ... [2024-10-11 14:33:49,231 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4137932a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.10 02:33:49, skipping insertion in model container [2024-10-11 14:33:49,232 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:33:48" (2/3) ... [2024-10-11 14:33:49,232 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4137932a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.10 02:33:49, skipping insertion in model container [2024-10-11 14:33:49,232 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.10 02:33:49" (3/3) ... [2024-10-11 14:33:49,233 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-more-nonblocking-counter-alt2.wvr.c [2024-10-11 14:33:49,248 INFO L209 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-10-11 14:33:49,248 INFO L149 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-10-11 14:33:49,248 INFO L484 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-10-11 14:33:49,297 INFO L143 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2024-10-11 14:33:49,332 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 26 places, 21 transitions, 56 flow [2024-10-11 14:33:49,357 INFO L124 PetriNetUnfolderBase]: 2/19 cut-off events. [2024-10-11 14:33:49,357 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-10-11 14:33:49,360 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28 conditions, 19 events. 2/19 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 19 event pairs, 0 based on Foata normal form. 0/16 useless extension candidates. Maximal degree in co-relation 14. Up to 2 conditions per place. [2024-10-11 14:33:49,360 INFO L82 GeneralOperation]: Start removeDead. Operand has 26 places, 21 transitions, 56 flow [2024-10-11 14:33:49,363 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 23 places, 18 transitions, 48 flow [2024-10-11 14:33:49,376 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-10-11 14:33:49,382 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;@6f8329b4, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-10-11 14:33:49,383 INFO L334 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2024-10-11 14:33:49,390 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-10-11 14:33:49,391 INFO L124 PetriNetUnfolderBase]: 2/17 cut-off events. [2024-10-11 14:33:49,391 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-10-11 14:33:49,391 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 14:33:49,392 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 14:33:49,392 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-11 14:33:49,399 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 14:33:49,399 INFO L85 PathProgramCache]: Analyzing trace with hash 1426367925, now seen corresponding path program 1 times [2024-10-11 14:33:49,409 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 14:33:49,409 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1555244137] [2024-10-11 14:33:49,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 14:33:49,411 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 14:33:49,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 14:33:49,799 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 14:33:49,800 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 14:33:49,800 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1555244137] [2024-10-11 14:33:49,801 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1555244137] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-11 14:33:49,801 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-11 14:33:49,801 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-10-11 14:33:49,803 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1050934652] [2024-10-11 14:33:49,803 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-11 14:33:49,812 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-11 14:33:49,817 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 14:33:49,845 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-11 14:33:49,846 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-11 14:33:49,857 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 21 [2024-10-11 14:33:49,859 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 23 places, 18 transitions, 48 flow. Second operand has 3 states, 3 states have (on average 9.0) internal successors, (27), 3 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 14:33:49,860 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 14:33:49,860 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 21 [2024-10-11 14:33:49,876 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 14:33:50,000 INFO L124 PetriNetUnfolderBase]: 73/144 cut-off events. [2024-10-11 14:33:50,001 INFO L125 PetriNetUnfolderBase]: For 14/14 co-relation queries the response was YES. [2024-10-11 14:33:50,002 INFO L83 FinitePrefix]: Finished finitePrefix Result has 301 conditions, 144 events. 73/144 cut-off events. For 14/14 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 410 event pairs, 22 based on Foata normal form. 1/141 useless extension candidates. Maximal degree in co-relation 252. Up to 74 conditions per place. [2024-10-11 14:33:50,005 INFO L140 encePairwiseOnDemand]: 18/21 looper letters, 20 selfloop transitions, 2 changer transitions 3/28 dead transitions. [2024-10-11 14:33:50,005 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 25 places, 28 transitions, 127 flow [2024-10-11 14:33:50,006 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-11 14:33:50,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-10-11 14:33:50,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 41 transitions. [2024-10-11 14:33:50,015 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6507936507936508 [2024-10-11 14:33:50,016 INFO L175 Difference]: Start difference. First operand has 23 places, 18 transitions, 48 flow. Second operand 3 states and 41 transitions. [2024-10-11 14:33:50,017 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 25 places, 28 transitions, 127 flow [2024-10-11 14:33:50,020 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 21 places, 28 transitions, 113 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-10-11 14:33:50,022 INFO L231 Difference]: Finished difference. Result has 22 places, 19 transitions, 52 flow [2024-10-11 14:33:50,024 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=40, PETRI_DIFFERENCE_MINUEND_PLACES=19, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=18, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=16, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=52, PETRI_PLACES=22, PETRI_TRANSITIONS=19} [2024-10-11 14:33:50,029 INFO L277 CegarLoopForPetriNet]: 23 programPoint places, -1 predicate places. [2024-10-11 14:33:50,030 INFO L471 AbstractCegarLoop]: Abstraction has has 22 places, 19 transitions, 52 flow [2024-10-11 14:33:50,030 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 9.0) internal successors, (27), 3 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 14:33:50,030 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 14:33:50,030 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 14:33:50,031 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-10-11 14:33:50,031 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-11 14:33:50,032 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 14:33:50,033 INFO L85 PathProgramCache]: Analyzing trace with hash 2133826849, now seen corresponding path program 1 times [2024-10-11 14:33:50,033 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 14:33:50,033 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1793268360] [2024-10-11 14:33:50,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 14:33:50,034 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 14:33:50,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 14:33:50,220 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-11 14:33:50,220 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 14:33:50,220 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1793268360] [2024-10-11 14:33:50,221 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1793268360] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-11 14:33:50,221 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-11 14:33:50,221 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-10-11 14:33:50,221 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [715072865] [2024-10-11 14:33:50,221 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-11 14:33:50,224 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-10-11 14:33:50,224 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 14:33:50,225 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-10-11 14:33:50,225 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-10-11 14:33:50,229 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 21 [2024-10-11 14:33:50,230 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 22 places, 19 transitions, 52 flow. Second operand has 4 states, 4 states have (on average 7.5) internal successors, (30), 4 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 14:33:50,230 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 14:33:50,230 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 21 [2024-10-11 14:33:50,230 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 14:33:50,342 INFO L124 PetriNetUnfolderBase]: 141/258 cut-off events. [2024-10-11 14:33:50,343 INFO L125 PetriNetUnfolderBase]: For 8/8 co-relation queries the response was YES. [2024-10-11 14:33:50,345 INFO L83 FinitePrefix]: Finished finitePrefix Result has 531 conditions, 258 events. 141/258 cut-off events. For 8/8 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 889 event pairs, 81 based on Foata normal form. 0/213 useless extension candidates. Maximal degree in co-relation 277. Up to 179 conditions per place. [2024-10-11 14:33:50,347 INFO L140 encePairwiseOnDemand]: 17/21 looper letters, 21 selfloop transitions, 3 changer transitions 0/27 dead transitions. [2024-10-11 14:33:50,347 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 25 places, 27 transitions, 117 flow [2024-10-11 14:33:50,348 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-10-11 14:33:50,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-10-11 14:33:50,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 41 transitions. [2024-10-11 14:33:50,349 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4880952380952381 [2024-10-11 14:33:50,349 INFO L175 Difference]: Start difference. First operand has 22 places, 19 transitions, 52 flow. Second operand 4 states and 41 transitions. [2024-10-11 14:33:50,349 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 25 places, 27 transitions, 117 flow [2024-10-11 14:33:50,350 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 24 places, 27 transitions, 115 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-10-11 14:33:50,351 INFO L231 Difference]: Finished difference. Result has 25 places, 20 transitions, 64 flow [2024-10-11 14:33:50,352 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=50, PETRI_DIFFERENCE_MINUEND_PLACES=21, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=19, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=16, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=64, PETRI_PLACES=25, PETRI_TRANSITIONS=20} [2024-10-11 14:33:50,352 INFO L277 CegarLoopForPetriNet]: 23 programPoint places, 2 predicate places. [2024-10-11 14:33:50,353 INFO L471 AbstractCegarLoop]: Abstraction has has 25 places, 20 transitions, 64 flow [2024-10-11 14:33:50,353 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.5) internal successors, (30), 4 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 14:33:50,353 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 14:33:50,353 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 14:33:50,353 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-10-11 14:33:50,354 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-11 14:33:50,354 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 14:33:50,355 INFO L85 PathProgramCache]: Analyzing trace with hash -1055225553, now seen corresponding path program 1 times [2024-10-11 14:33:50,355 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 14:33:50,356 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1142553270] [2024-10-11 14:33:50,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 14:33:50,356 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 14:33:50,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 14:33:50,770 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 14:33:50,771 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 14:33:50,771 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1142553270] [2024-10-11 14:33:50,771 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1142553270] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-11 14:33:50,771 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [176184187] [2024-10-11 14:33:50,771 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 14:33:50,772 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 14:33:50,772 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 14:33:50,775 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-11 14:33:50,776 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-10-11 14:33:50,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 14:33:50,867 INFO L255 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-10-11 14:33:50,872 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 14:33:51,104 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 14:33:51,105 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-11 14:33:51,447 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 14:33:51,447 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [176184187] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-11 14:33:51,448 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-11 14:33:51,448 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 9, 7] total 19 [2024-10-11 14:33:51,448 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1956248721] [2024-10-11 14:33:51,449 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-11 14:33:51,449 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-10-11 14:33:51,451 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 14:33:51,451 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-10-11 14:33:51,452 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=266, Unknown=0, NotChecked=0, Total=380 [2024-10-11 14:33:51,474 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 21 [2024-10-11 14:33:51,474 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 25 places, 20 transitions, 64 flow. Second operand has 20 states, 20 states have (on average 5.3) internal successors, (106), 20 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 14:33:51,475 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 14:33:51,475 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 21 [2024-10-11 14:33:51,475 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 14:33:52,207 INFO L124 PetriNetUnfolderBase]: 402/697 cut-off events. [2024-10-11 14:33:52,207 INFO L125 PetriNetUnfolderBase]: For 187/187 co-relation queries the response was YES. [2024-10-11 14:33:52,209 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1691 conditions, 697 events. 402/697 cut-off events. For 187/187 co-relation queries the response was YES. Maximal size of possible extension queue 46. Compared 2923 event pairs, 5 based on Foata normal form. 2/645 useless extension candidates. Maximal degree in co-relation 598. Up to 148 conditions per place. [2024-10-11 14:33:52,213 INFO L140 encePairwiseOnDemand]: 11/21 looper letters, 90 selfloop transitions, 28 changer transitions 19/138 dead transitions. [2024-10-11 14:33:52,213 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 41 places, 138 transitions, 696 flow [2024-10-11 14:33:52,213 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-10-11 14:33:52,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2024-10-11 14:33:52,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 184 transitions. [2024-10-11 14:33:52,216 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5154061624649859 [2024-10-11 14:33:52,216 INFO L175 Difference]: Start difference. First operand has 25 places, 20 transitions, 64 flow. Second operand 17 states and 184 transitions. [2024-10-11 14:33:52,216 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 41 places, 138 transitions, 696 flow [2024-10-11 14:33:52,218 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 39 places, 138 transitions, 669 flow, removed 3 selfloop flow, removed 2 redundant places. [2024-10-11 14:33:52,220 INFO L231 Difference]: Finished difference. Result has 51 places, 47 transitions, 302 flow [2024-10-11 14:33:52,220 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=58, PETRI_DIFFERENCE_MINUEND_PLACES=23, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=20, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=9, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=302, PETRI_PLACES=51, PETRI_TRANSITIONS=47} [2024-10-11 14:33:52,221 INFO L277 CegarLoopForPetriNet]: 23 programPoint places, 28 predicate places. [2024-10-11 14:33:52,221 INFO L471 AbstractCegarLoop]: Abstraction has has 51 places, 47 transitions, 302 flow [2024-10-11 14:33:52,221 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 5.3) internal successors, (106), 20 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 14:33:52,222 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 14:33:52,222 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 14:33:52,240 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2024-10-11 14:33:52,426 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 14:33:52,427 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-11 14:33:52,427 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 14:33:52,428 INFO L85 PathProgramCache]: Analyzing trace with hash -584159275, now seen corresponding path program 2 times [2024-10-11 14:33:52,428 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 14:33:52,428 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1706909543] [2024-10-11 14:33:52,428 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 14:33:52,428 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 14:33:52,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 14:33:52,571 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-11 14:33:52,572 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 14:33:52,572 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1706909543] [2024-10-11 14:33:52,572 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1706909543] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-11 14:33:52,572 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [814684579] [2024-10-11 14:33:52,572 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-11 14:33:52,573 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 14:33:52,573 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 14:33:52,574 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-11 14:33:52,576 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-10-11 14:33:52,628 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-11 14:33:52,628 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-11 14:33:52,630 INFO L255 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 11 conjuncts are in the unsatisfiable core [2024-10-11 14:33:52,631 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 14:33:52,677 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-11 14:33:52,677 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-11 14:33:52,887 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-11 14:33:52,887 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [814684579] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-11 14:33:52,887 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-11 14:33:52,888 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5, 5] total 10 [2024-10-11 14:33:52,888 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [672647033] [2024-10-11 14:33:52,888 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-11 14:33:52,889 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-10-11 14:33:52,889 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 14:33:52,890 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-10-11 14:33:52,890 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=73, Unknown=0, NotChecked=0, Total=110 [2024-10-11 14:33:52,902 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 21 [2024-10-11 14:33:52,902 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 47 transitions, 302 flow. Second operand has 11 states, 11 states have (on average 6.0) internal successors, (66), 11 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 14:33:52,902 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 14:33:52,903 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 21 [2024-10-11 14:33:52,903 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 14:33:53,098 INFO L124 PetriNetUnfolderBase]: 415/722 cut-off events. [2024-10-11 14:33:53,099 INFO L125 PetriNetUnfolderBase]: For 1496/1496 co-relation queries the response was YES. [2024-10-11 14:33:53,102 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2622 conditions, 722 events. 415/722 cut-off events. For 1496/1496 co-relation queries the response was YES. Maximal size of possible extension queue 49. Compared 3042 event pairs, 39 based on Foata normal form. 24/746 useless extension candidates. Maximal degree in co-relation 2455. Up to 349 conditions per place. [2024-10-11 14:33:53,107 INFO L140 encePairwiseOnDemand]: 15/21 looper letters, 63 selfloop transitions, 20 changer transitions 2/86 dead transitions. [2024-10-11 14:33:53,107 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 86 transitions, 700 flow [2024-10-11 14:33:53,108 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-10-11 14:33:53,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-10-11 14:33:53,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 63 transitions. [2024-10-11 14:33:53,110 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5 [2024-10-11 14:33:53,110 INFO L175 Difference]: Start difference. First operand has 51 places, 47 transitions, 302 flow. Second operand 6 states and 63 transitions. [2024-10-11 14:33:53,110 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 86 transitions, 700 flow [2024-10-11 14:33:53,122 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 86 transitions, 662 flow, removed 16 selfloop flow, removed 2 redundant places. [2024-10-11 14:33:53,124 INFO L231 Difference]: Finished difference. Result has 57 places, 53 transitions, 411 flow [2024-10-11 14:33:53,124 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=282, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=411, PETRI_PLACES=57, PETRI_TRANSITIONS=53} [2024-10-11 14:33:53,126 INFO L277 CegarLoopForPetriNet]: 23 programPoint places, 34 predicate places. [2024-10-11 14:33:53,126 INFO L471 AbstractCegarLoop]: Abstraction has has 57 places, 53 transitions, 411 flow [2024-10-11 14:33:53,126 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 6.0) internal successors, (66), 11 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 14:33:53,127 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 14:33:53,127 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 14:33:53,144 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2024-10-11 14:33:53,327 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 14:33:53,328 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-11 14:33:53,329 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 14:33:53,329 INFO L85 PathProgramCache]: Analyzing trace with hash 464964525, now seen corresponding path program 3 times [2024-10-11 14:33:53,329 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 14:33:53,329 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [65395835] [2024-10-11 14:33:53,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 14:33:53,329 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 14:33:53,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 14:33:53,527 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 14:33:53,527 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 14:33:53,527 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [65395835] [2024-10-11 14:33:53,527 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [65395835] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-11 14:33:53,528 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [427093308] [2024-10-11 14:33:53,528 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-10-11 14:33:53,528 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 14:33:53,528 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 14:33:53,530 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-11 14:33:53,532 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-10-11 14:33:53,590 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-10-11 14:33:53,590 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-11 14:33:53,591 INFO L255 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-10-11 14:33:53,593 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 14:33:53,725 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 14:33:53,725 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-11 14:33:53,930 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 14:33:53,930 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [427093308] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-11 14:33:53,930 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-11 14:33:53,930 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 8] total 15 [2024-10-11 14:33:53,931 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [151284988] [2024-10-11 14:33:53,931 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-11 14:33:53,931 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-10-11 14:33:53,932 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 14:33:53,932 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-10-11 14:33:53,932 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2024-10-11 14:33:53,944 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 21 [2024-10-11 14:33:53,944 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 53 transitions, 411 flow. Second operand has 15 states, 15 states have (on average 5.666666666666667) internal successors, (85), 15 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 14:33:53,944 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 14:33:53,944 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 21 [2024-10-11 14:33:53,944 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 14:33:54,881 INFO L124 PetriNetUnfolderBase]: 853/1423 cut-off events. [2024-10-11 14:33:54,882 INFO L125 PetriNetUnfolderBase]: For 5018/5018 co-relation queries the response was YES. [2024-10-11 14:33:54,886 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6045 conditions, 1423 events. 853/1423 cut-off events. For 5018/5018 co-relation queries the response was YES. Maximal size of possible extension queue 74. Compared 6541 event pairs, 6 based on Foata normal form. 33/1456 useless extension candidates. Maximal degree in co-relation 5849. Up to 324 conditions per place. [2024-10-11 14:33:54,893 INFO L140 encePairwiseOnDemand]: 11/21 looper letters, 135 selfloop transitions, 119 changer transitions 15/270 dead transitions. [2024-10-11 14:33:54,893 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 84 places, 270 transitions, 2546 flow [2024-10-11 14:33:54,893 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2024-10-11 14:33:54,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2024-10-11 14:33:54,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 262 transitions. [2024-10-11 14:33:54,896 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4302134646962233 [2024-10-11 14:33:54,896 INFO L175 Difference]: Start difference. First operand has 57 places, 53 transitions, 411 flow. Second operand 29 states and 262 transitions. [2024-10-11 14:33:54,896 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 84 places, 270 transitions, 2546 flow [2024-10-11 14:33:54,908 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 83 places, 270 transitions, 2444 flow, removed 51 selfloop flow, removed 1 redundant places. [2024-10-11 14:33:54,912 INFO L231 Difference]: Finished difference. Result has 104 places, 173 transitions, 1993 flow [2024-10-11 14:33:54,913 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=389, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=53, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=17, PETRI_DIFFERENCE_SUBTRAHEND_STATES=29, PETRI_FLOW=1993, PETRI_PLACES=104, PETRI_TRANSITIONS=173} [2024-10-11 14:33:54,913 INFO L277 CegarLoopForPetriNet]: 23 programPoint places, 81 predicate places. [2024-10-11 14:33:54,914 INFO L471 AbstractCegarLoop]: Abstraction has has 104 places, 173 transitions, 1993 flow [2024-10-11 14:33:54,914 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 5.666666666666667) internal successors, (85), 15 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 14:33:54,914 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 14:33:54,914 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 14:33:54,931 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-10-11 14:33:55,118 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 14:33:55,119 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-11 14:33:55,119 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 14:33:55,120 INFO L85 PathProgramCache]: Analyzing trace with hash -1088901193, now seen corresponding path program 4 times [2024-10-11 14:33:55,120 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 14:33:55,120 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [773331082] [2024-10-11 14:33:55,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 14:33:55,120 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 14:33:55,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 14:33:55,314 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 14:33:55,315 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 14:33:55,315 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [773331082] [2024-10-11 14:33:55,315 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [773331082] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-11 14:33:55,315 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1850395575] [2024-10-11 14:33:55,315 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-10-11 14:33:55,315 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 14:33:55,316 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 14:33:55,318 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-11 14:33:55,319 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-10-11 14:33:55,369 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-10-11 14:33:55,370 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-11 14:33:55,371 INFO L255 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-10-11 14:33:55,372 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 14:33:55,490 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 14:33:55,490 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-11 14:33:55,714 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 14:33:55,715 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1850395575] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-11 14:33:55,715 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-11 14:33:55,715 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 7] total 15 [2024-10-11 14:33:55,715 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [292744646] [2024-10-11 14:33:55,716 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-11 14:33:55,717 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-10-11 14:33:55,717 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 14:33:55,718 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-10-11 14:33:55,718 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=149, Unknown=0, NotChecked=0, Total=210 [2024-10-11 14:33:55,722 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 21 [2024-10-11 14:33:55,723 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 104 places, 173 transitions, 1993 flow. Second operand has 15 states, 15 states have (on average 6.333333333333333) internal successors, (95), 15 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 14:33:55,723 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 14:33:55,723 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 21 [2024-10-11 14:33:55,723 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 14:33:56,715 INFO L124 PetriNetUnfolderBase]: 1191/2038 cut-off events. [2024-10-11 14:33:56,715 INFO L125 PetriNetUnfolderBase]: For 18770/18780 co-relation queries the response was YES. [2024-10-11 14:33:56,725 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12218 conditions, 2038 events. 1191/2038 cut-off events. For 18770/18780 co-relation queries the response was YES. Maximal size of possible extension queue 115. Compared 10629 event pairs, 46 based on Foata normal form. 14/2050 useless extension candidates. Maximal degree in co-relation 11963. Up to 526 conditions per place. [2024-10-11 14:33:56,741 INFO L140 encePairwiseOnDemand]: 12/21 looper letters, 135 selfloop transitions, 204 changer transitions 0/360 dead transitions. [2024-10-11 14:33:56,741 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 123 places, 360 transitions, 4858 flow [2024-10-11 14:33:56,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2024-10-11 14:33:56,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2024-10-11 14:33:56,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 202 transitions. [2024-10-11 14:33:56,744 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4580498866213152 [2024-10-11 14:33:56,744 INFO L175 Difference]: Start difference. First operand has 104 places, 173 transitions, 1993 flow. Second operand 21 states and 202 transitions. [2024-10-11 14:33:56,745 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 123 places, 360 transitions, 4858 flow [2024-10-11 14:33:56,844 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 117 places, 360 transitions, 4376 flow, removed 229 selfloop flow, removed 6 redundant places. [2024-10-11 14:33:56,851 INFO L231 Difference]: Finished difference. Result has 133 places, 298 transitions, 4076 flow [2024-10-11 14:33:56,852 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=1764, PETRI_DIFFERENCE_MINUEND_PLACES=97, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=173, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=96, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=4076, PETRI_PLACES=133, PETRI_TRANSITIONS=298} [2024-10-11 14:33:56,854 INFO L277 CegarLoopForPetriNet]: 23 programPoint places, 110 predicate places. [2024-10-11 14:33:56,854 INFO L471 AbstractCegarLoop]: Abstraction has has 133 places, 298 transitions, 4076 flow [2024-10-11 14:33:56,855 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 6.333333333333333) internal successors, (95), 15 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 14:33:56,855 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 14:33:56,855 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 14:33:56,872 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-10-11 14:33:57,055 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2024-10-11 14:33:57,056 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-11 14:33:57,057 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 14:33:57,057 INFO L85 PathProgramCache]: Analyzing trace with hash 886965879, now seen corresponding path program 5 times [2024-10-11 14:33:57,057 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 14:33:57,057 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1111076156] [2024-10-11 14:33:57,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 14:33:57,058 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 14:33:57,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 14:33:57,289 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 14:33:57,289 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 14:33:57,289 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1111076156] [2024-10-11 14:33:57,290 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1111076156] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-11 14:33:57,290 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1551284478] [2024-10-11 14:33:57,290 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-10-11 14:33:57,290 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 14:33:57,290 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 14:33:57,292 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-11 14:33:57,293 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-10-11 14:33:57,335 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-11 14:33:57,336 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-11 14:33:57,336 INFO L255 TraceCheckSpWp]: Trace formula consists of 25 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-10-11 14:33:57,337 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 14:33:57,459 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 14:33:57,460 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-11 14:33:57,717 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 14:33:57,717 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1551284478] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-11 14:33:57,717 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-11 14:33:57,718 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 8] total 18 [2024-10-11 14:33:57,718 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1591204624] [2024-10-11 14:33:57,718 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-11 14:33:57,718 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-10-11 14:33:57,719 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 14:33:57,719 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-10-11 14:33:57,719 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=232, Unknown=0, NotChecked=0, Total=306 [2024-10-11 14:33:57,738 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 21 [2024-10-11 14:33:57,738 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 133 places, 298 transitions, 4076 flow. Second operand has 18 states, 18 states have (on average 5.833333333333333) internal successors, (105), 18 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 14:33:57,738 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 14:33:57,738 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 21 [2024-10-11 14:33:57,739 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 14:33:59,616 INFO L124 PetriNetUnfolderBase]: 1727/2982 cut-off events. [2024-10-11 14:33:59,616 INFO L125 PetriNetUnfolderBase]: For 38410/38444 co-relation queries the response was YES. [2024-10-11 14:33:59,632 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19335 conditions, 2982 events. 1727/2982 cut-off events. For 38410/38444 co-relation queries the response was YES. Maximal size of possible extension queue 160. Compared 16939 event pairs, 32 based on Foata normal form. 75/3049 useless extension candidates. Maximal degree in co-relation 18628. Up to 694 conditions per place. [2024-10-11 14:33:59,656 INFO L140 encePairwiseOnDemand]: 13/21 looper letters, 117 selfloop transitions, 527 changer transitions 2/667 dead transitions. [2024-10-11 14:33:59,656 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 162 places, 667 transitions, 10103 flow [2024-10-11 14:33:59,656 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2024-10-11 14:33:59,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2024-10-11 14:33:59,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 269 transitions. [2024-10-11 14:33:59,658 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.42698412698412697 [2024-10-11 14:33:59,658 INFO L175 Difference]: Start difference. First operand has 133 places, 298 transitions, 4076 flow. Second operand 30 states and 269 transitions. [2024-10-11 14:33:59,658 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 162 places, 667 transitions, 10103 flow [2024-10-11 14:33:59,954 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 160 places, 667 transitions, 9718 flow, removed 190 selfloop flow, removed 2 redundant places. [2024-10-11 14:33:59,965 INFO L231 Difference]: Finished difference. Result has 165 places, 580 transitions, 9179 flow [2024-10-11 14:33:59,966 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=3913, PETRI_DIFFERENCE_MINUEND_PLACES=131, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=298, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=249, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=30, PETRI_FLOW=9179, PETRI_PLACES=165, PETRI_TRANSITIONS=580} [2024-10-11 14:33:59,967 INFO L277 CegarLoopForPetriNet]: 23 programPoint places, 142 predicate places. [2024-10-11 14:33:59,967 INFO L471 AbstractCegarLoop]: Abstraction has has 165 places, 580 transitions, 9179 flow [2024-10-11 14:33:59,967 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 5.833333333333333) internal successors, (105), 18 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 14:33:59,967 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 14:33:59,967 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 14:33:59,984 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2024-10-11 14:34:00,168 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 14:34:00,169 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-11 14:34:00,169 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 14:34:00,169 INFO L85 PathProgramCache]: Analyzing trace with hash -388408205, now seen corresponding path program 6 times [2024-10-11 14:34:00,169 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 14:34:00,171 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1127820265] [2024-10-11 14:34:00,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 14:34:00,171 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 14:34:00,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 14:34:00,343 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 14:34:00,344 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 14:34:00,344 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1127820265] [2024-10-11 14:34:00,344 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1127820265] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-11 14:34:00,344 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [680812475] [2024-10-11 14:34:00,345 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-10-11 14:34:00,347 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 14:34:00,347 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 14:34:00,349 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-11 14:34:00,350 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-10-11 14:34:00,405 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2024-10-11 14:34:00,406 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-11 14:34:00,406 INFO L255 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-10-11 14:34:00,407 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 14:34:00,518 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 14:34:00,519 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-11 14:34:00,678 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 14:34:00,679 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [680812475] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-11 14:34:00,679 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-11 14:34:00,679 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 7] total 17 [2024-10-11 14:34:00,679 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [941217125] [2024-10-11 14:34:00,679 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-11 14:34:00,680 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-10-11 14:34:00,680 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 14:34:00,680 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-10-11 14:34:00,681 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=200, Unknown=0, NotChecked=0, Total=272 [2024-10-11 14:34:00,684 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 21 [2024-10-11 14:34:00,685 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 165 places, 580 transitions, 9179 flow. Second operand has 17 states, 17 states have (on average 5.9411764705882355) internal successors, (101), 17 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 14:34:00,685 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 14:34:00,685 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 21 [2024-10-11 14:34:00,685 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 14:34:02,089 INFO L124 PetriNetUnfolderBase]: 1985/3463 cut-off events. [2024-10-11 14:34:02,089 INFO L125 PetriNetUnfolderBase]: For 45224/45260 co-relation queries the response was YES. [2024-10-11 14:34:02,107 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24848 conditions, 3463 events. 1985/3463 cut-off events. For 45224/45260 co-relation queries the response was YES. Maximal size of possible extension queue 197. Compared 20630 event pairs, 46 based on Foata normal form. 54/3513 useless extension candidates. Maximal degree in co-relation 24116. Up to 790 conditions per place. [2024-10-11 14:34:02,205 INFO L140 encePairwiseOnDemand]: 13/21 looper letters, 185 selfloop transitions, 589 changer transitions 0/795 dead transitions. [2024-10-11 14:34:02,206 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 192 places, 795 transitions, 13743 flow [2024-10-11 14:34:02,206 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2024-10-11 14:34:02,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2024-10-11 14:34:02,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 290 transitions. [2024-10-11 14:34:02,208 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4603174603174603 [2024-10-11 14:34:02,208 INFO L175 Difference]: Start difference. First operand has 165 places, 580 transitions, 9179 flow. Second operand 30 states and 290 transitions. [2024-10-11 14:34:02,208 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 192 places, 795 transitions, 13743 flow [2024-10-11 14:34:02,453 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 188 places, 795 transitions, 12874 flow, removed 429 selfloop flow, removed 4 redundant places. [2024-10-11 14:34:02,465 INFO L231 Difference]: Finished difference. Result has 199 places, 726 transitions, 13062 flow [2024-10-11 14:34:02,466 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=8545, PETRI_DIFFERENCE_MINUEND_PLACES=159, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=573, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=449, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=84, PETRI_DIFFERENCE_SUBTRAHEND_STATES=30, PETRI_FLOW=13062, PETRI_PLACES=199, PETRI_TRANSITIONS=726} [2024-10-11 14:34:02,467 INFO L277 CegarLoopForPetriNet]: 23 programPoint places, 176 predicate places. [2024-10-11 14:34:02,467 INFO L471 AbstractCegarLoop]: Abstraction has has 199 places, 726 transitions, 13062 flow [2024-10-11 14:34:02,467 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 5.9411764705882355) internal successors, (101), 17 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 14:34:02,467 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 14:34:02,467 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 14:34:02,485 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-10-11 14:34:02,668 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2024-10-11 14:34:02,668 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-11 14:34:02,669 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 14:34:02,669 INFO L85 PathProgramCache]: Analyzing trace with hash 2110190859, now seen corresponding path program 7 times [2024-10-11 14:34:02,669 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 14:34:02,669 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [397891584] [2024-10-11 14:34:02,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 14:34:02,669 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 14:34:02,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 14:34:02,842 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 14:34:02,843 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 14:34:02,843 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [397891584] [2024-10-11 14:34:02,843 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [397891584] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-11 14:34:02,843 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2117901845] [2024-10-11 14:34:02,843 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-10-11 14:34:02,844 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 14:34:02,844 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 14:34:02,845 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-11 14:34:02,847 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-10-11 14:34:02,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 14:34:02,892 INFO L255 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-10-11 14:34:02,893 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 14:34:03,028 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 14:34:03,028 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-11 14:34:03,292 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 14:34:03,292 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2117901845] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-11 14:34:03,293 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-11 14:34:03,293 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 17 [2024-10-11 14:34:03,293 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1206182039] [2024-10-11 14:34:03,293 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-11 14:34:03,294 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-10-11 14:34:03,294 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 14:34:03,294 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-10-11 14:34:03,295 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=194, Unknown=0, NotChecked=0, Total=272 [2024-10-11 14:34:03,299 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 21 [2024-10-11 14:34:03,299 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 199 places, 726 transitions, 13062 flow. Second operand has 17 states, 17 states have (on average 6.176470588235294) internal successors, (105), 17 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 14:34:03,299 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 14:34:03,299 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 21 [2024-10-11 14:34:03,299 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 14:34:04,989 INFO L124 PetriNetUnfolderBase]: 2587/4523 cut-off events. [2024-10-11 14:34:04,989 INFO L125 PetriNetUnfolderBase]: For 60940/60964 co-relation queries the response was YES. [2024-10-11 14:34:05,023 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35492 conditions, 4523 events. 2587/4523 cut-off events. For 60940/60964 co-relation queries the response was YES. Maximal size of possible extension queue 257. Compared 28591 event pairs, 115 based on Foata normal form. 46/4569 useless extension candidates. Maximal degree in co-relation 34561. Up to 924 conditions per place. [2024-10-11 14:34:05,059 INFO L140 encePairwiseOnDemand]: 13/21 looper letters, 267 selfloop transitions, 763 changer transitions 2/1053 dead transitions. [2024-10-11 14:34:05,060 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 222 places, 1053 transitions, 20401 flow [2024-10-11 14:34:05,060 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2024-10-11 14:34:05,060 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2024-10-11 14:34:05,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 237 transitions. [2024-10-11 14:34:05,062 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.47023809523809523 [2024-10-11 14:34:05,062 INFO L175 Difference]: Start difference. First operand has 199 places, 726 transitions, 13062 flow. Second operand 24 states and 237 transitions. [2024-10-11 14:34:05,062 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 222 places, 1053 transitions, 20401 flow [2024-10-11 14:34:05,585 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 215 places, 1053 transitions, 19817 flow, removed 216 selfloop flow, removed 7 redundant places. [2024-10-11 14:34:05,604 INFO L231 Difference]: Finished difference. Result has 229 places, 963 transitions, 20009 flow [2024-10-11 14:34:05,605 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=12613, PETRI_DIFFERENCE_MINUEND_PLACES=192, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=726, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=544, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=113, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=20009, PETRI_PLACES=229, PETRI_TRANSITIONS=963} [2024-10-11 14:34:05,605 INFO L277 CegarLoopForPetriNet]: 23 programPoint places, 206 predicate places. [2024-10-11 14:34:05,606 INFO L471 AbstractCegarLoop]: Abstraction has has 229 places, 963 transitions, 20009 flow [2024-10-11 14:34:05,606 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 6.176470588235294) internal successors, (105), 17 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 14:34:05,606 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 14:34:05,606 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 14:34:05,618 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2024-10-11 14:34:05,806 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 14:34:05,807 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-11 14:34:05,807 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 14:34:05,807 INFO L85 PathProgramCache]: Analyzing trace with hash -1186924357, now seen corresponding path program 8 times [2024-10-11 14:34:05,807 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 14:34:05,807 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2076823296] [2024-10-11 14:34:05,807 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 14:34:05,808 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 14:34:05,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 14:34:05,962 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 14:34:05,962 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 14:34:05,962 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2076823296] [2024-10-11 14:34:05,962 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2076823296] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-11 14:34:05,962 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2106412371] [2024-10-11 14:34:05,963 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-11 14:34:05,963 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 14:34:05,963 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 14:34:05,965 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-11 14:34:05,966 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-10-11 14:34:06,019 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-11 14:34:06,055 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-11 14:34:06,057 INFO L255 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-10-11 14:34:06,058 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 14:34:06,167 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 14:34:06,168 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-11 14:34:06,331 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 14:34:06,331 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2106412371] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-11 14:34:06,332 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-11 14:34:06,332 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 8] total 15 [2024-10-11 14:34:06,332 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [418926496] [2024-10-11 14:34:06,332 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-11 14:34:06,333 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-10-11 14:34:06,333 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 14:34:06,333 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-10-11 14:34:06,334 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2024-10-11 14:34:06,340 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 21 [2024-10-11 14:34:06,340 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 229 places, 963 transitions, 20009 flow. Second operand has 15 states, 15 states have (on average 5.666666666666667) internal successors, (85), 15 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 14:34:06,340 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 14:34:06,340 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 21 [2024-10-11 14:34:06,340 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 14:34:08,856 INFO L124 PetriNetUnfolderBase]: 3921/6598 cut-off events. [2024-10-11 14:34:08,857 INFO L125 PetriNetUnfolderBase]: For 113141/113141 co-relation queries the response was YES. [2024-10-11 14:34:08,890 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58542 conditions, 6598 events. 3921/6598 cut-off events. For 113141/113141 co-relation queries the response was YES. Maximal size of possible extension queue 352. Compared 41654 event pairs, 42 based on Foata normal form. 118/6716 useless extension candidates. Maximal degree in co-relation 57493. Up to 1299 conditions per place. [2024-10-11 14:34:08,938 INFO L140 encePairwiseOnDemand]: 11/21 looper letters, 413 selfloop transitions, 1255 changer transitions 17/1686 dead transitions. [2024-10-11 14:34:08,938 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 265 places, 1686 transitions, 37313 flow [2024-10-11 14:34:08,939 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2024-10-11 14:34:08,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2024-10-11 14:34:08,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 320 transitions. [2024-10-11 14:34:08,941 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4118404118404118 [2024-10-11 14:34:08,941 INFO L175 Difference]: Start difference. First operand has 229 places, 963 transitions, 20009 flow. Second operand 37 states and 320 transitions. [2024-10-11 14:34:08,941 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 265 places, 1686 transitions, 37313 flow [2024-10-11 14:34:10,376 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 256 places, 1686 transitions, 36160 flow, removed 97 selfloop flow, removed 9 redundant places. [2024-10-11 14:34:10,402 INFO L231 Difference]: Finished difference. Result has 279 places, 1501 transitions, 35585 flow [2024-10-11 14:34:10,403 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=19272, PETRI_DIFFERENCE_MINUEND_PLACES=220, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=958, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=744, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=133, PETRI_DIFFERENCE_SUBTRAHEND_STATES=37, PETRI_FLOW=35585, PETRI_PLACES=279, PETRI_TRANSITIONS=1501} [2024-10-11 14:34:10,403 INFO L277 CegarLoopForPetriNet]: 23 programPoint places, 256 predicate places. [2024-10-11 14:34:10,403 INFO L471 AbstractCegarLoop]: Abstraction has has 279 places, 1501 transitions, 35585 flow [2024-10-11 14:34:10,404 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 5.666666666666667) internal successors, (85), 15 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 14:34:10,404 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 14:34:10,404 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 14:34:10,416 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2024-10-11 14:34:10,604 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2024-10-11 14:34:10,605 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-11 14:34:10,605 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 14:34:10,605 INFO L85 PathProgramCache]: Analyzing trace with hash 771752695, now seen corresponding path program 9 times [2024-10-11 14:34:10,605 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 14:34:10,606 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [907571843] [2024-10-11 14:34:10,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 14:34:10,606 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 14:34:10,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 14:34:10,778 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 14:34:10,778 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 14:34:10,778 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [907571843] [2024-10-11 14:34:10,779 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [907571843] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-11 14:34:10,779 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1773672087] [2024-10-11 14:34:10,779 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-10-11 14:34:10,779 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 14:34:10,779 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 14:34:10,781 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-11 14:34:10,782 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-10-11 14:34:10,837 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2024-10-11 14:34:10,837 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-11 14:34:10,838 INFO L255 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-10-11 14:34:10,839 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 14:34:11,002 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 14:34:11,003 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-11 14:34:11,188 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 14:34:11,188 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1773672087] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-11 14:34:11,188 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-11 14:34:11,188 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 7] total 16 [2024-10-11 14:34:11,189 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [441308228] [2024-10-11 14:34:11,189 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-11 14:34:11,189 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-10-11 14:34:11,190 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 14:34:11,190 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-10-11 14:34:11,190 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=168, Unknown=0, NotChecked=0, Total=240 [2024-10-11 14:34:11,204 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 21 [2024-10-11 14:34:11,205 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 279 places, 1501 transitions, 35585 flow. Second operand has 16 states, 16 states have (on average 6.25) internal successors, (100), 16 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 14:34:11,205 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 14:34:11,205 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 21 [2024-10-11 14:34:11,205 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 14:34:14,032 INFO L124 PetriNetUnfolderBase]: 3792/6553 cut-off events. [2024-10-11 14:34:14,033 INFO L125 PetriNetUnfolderBase]: For 165206/165298 co-relation queries the response was YES. [2024-10-11 14:34:14,090 INFO L83 FinitePrefix]: Finished finitePrefix Result has 66708 conditions, 6553 events. 3792/6553 cut-off events. For 165206/165298 co-relation queries the response was YES. Maximal size of possible extension queue 371. Compared 43426 event pairs, 416 based on Foata normal form. 24/6577 useless extension candidates. Maximal degree in co-relation 66276. Up to 2425 conditions per place. [2024-10-11 14:34:14,143 INFO L140 encePairwiseOnDemand]: 12/21 looper letters, 508 selfloop transitions, 1096 changer transitions 5/1643 dead transitions. [2024-10-11 14:34:14,144 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 296 places, 1643 transitions, 41820 flow [2024-10-11 14:34:14,144 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2024-10-11 14:34:14,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2024-10-11 14:34:14,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 165 transitions. [2024-10-11 14:34:14,147 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4365079365079365 [2024-10-11 14:34:14,148 INFO L175 Difference]: Start difference. First operand has 279 places, 1501 transitions, 35585 flow. Second operand 18 states and 165 transitions. [2024-10-11 14:34:14,148 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 296 places, 1643 transitions, 41820 flow [2024-10-11 14:34:16,316 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 294 places, 1643 transitions, 41356 flow, removed 203 selfloop flow, removed 2 redundant places. [2024-10-11 14:34:16,350 INFO L231 Difference]: Finished difference. Result has 301 places, 1605 transitions, 42232 flow [2024-10-11 14:34:16,351 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=35085, PETRI_DIFFERENCE_MINUEND_PLACES=277, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1498, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=986, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=440, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=42232, PETRI_PLACES=301, PETRI_TRANSITIONS=1605} [2024-10-11 14:34:16,352 INFO L277 CegarLoopForPetriNet]: 23 programPoint places, 278 predicate places. [2024-10-11 14:34:16,352 INFO L471 AbstractCegarLoop]: Abstraction has has 301 places, 1605 transitions, 42232 flow [2024-10-11 14:34:16,352 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 6.25) internal successors, (100), 16 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 14:34:16,352 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 14:34:16,352 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 14:34:16,364 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2024-10-11 14:34:16,553 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 14:34:16,553 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-11 14:34:16,554 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 14:34:16,554 INFO L85 PathProgramCache]: Analyzing trace with hash 384091021, now seen corresponding path program 10 times [2024-10-11 14:34:16,554 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 14:34:16,554 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2118473320] [2024-10-11 14:34:16,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 14:34:16,554 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 14:34:16,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 14:34:16,727 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 14:34:16,728 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 14:34:16,728 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2118473320] [2024-10-11 14:34:16,728 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2118473320] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-11 14:34:16,728 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1610036265] [2024-10-11 14:34:16,728 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-10-11 14:34:16,728 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 14:34:16,729 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 14:34:16,730 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-11 14:34:16,732 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-10-11 14:34:16,782 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-10-11 14:34:16,782 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-11 14:34:16,783 INFO L255 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-10-11 14:34:16,784 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 14:34:16,893 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 14:34:16,893 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-11 14:34:17,074 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 14:34:17,074 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1610036265] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-11 14:34:17,074 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-11 14:34:17,074 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 7] total 16 [2024-10-11 14:34:17,075 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1291735233] [2024-10-11 14:34:17,075 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-11 14:34:17,075 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-10-11 14:34:17,076 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 14:34:17,076 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-10-11 14:34:17,076 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2024-10-11 14:34:17,086 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 21 [2024-10-11 14:34:17,086 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 301 places, 1605 transitions, 42232 flow. Second operand has 16 states, 16 states have (on average 6.1875) internal successors, (99), 16 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 14:34:17,087 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 14:34:17,087 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 21 [2024-10-11 14:34:17,087 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 14:34:20,732 INFO L124 PetriNetUnfolderBase]: 4288/7347 cut-off events. [2024-10-11 14:34:20,733 INFO L125 PetriNetUnfolderBase]: For 231147/231215 co-relation queries the response was YES. [2024-10-11 14:34:20,979 INFO L83 FinitePrefix]: Finished finitePrefix Result has 82570 conditions, 7347 events. 4288/7347 cut-off events. For 231147/231215 co-relation queries the response was YES. Maximal size of possible extension queue 427. Compared 49259 event pairs, 244 based on Foata normal form. 44/7391 useless extension candidates. Maximal degree in co-relation 82472. Up to 1709 conditions per place. [2024-10-11 14:34:21,049 INFO L140 encePairwiseOnDemand]: 12/21 looper letters, 382 selfloop transitions, 1462 changer transitions 4/1882 dead transitions. [2024-10-11 14:34:21,049 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 321 places, 1882 transitions, 52516 flow [2024-10-11 14:34:21,049 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2024-10-11 14:34:21,050 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2024-10-11 14:34:21,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 222 transitions. [2024-10-11 14:34:21,051 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.44047619047619047 [2024-10-11 14:34:21,052 INFO L175 Difference]: Start difference. First operand has 301 places, 1605 transitions, 42232 flow. Second operand 24 states and 222 transitions. [2024-10-11 14:34:21,052 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 321 places, 1882 transitions, 52516 flow [2024-10-11 14:34:23,733 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 318 places, 1882 transitions, 52327 flow, removed 68 selfloop flow, removed 3 redundant places. [2024-10-11 14:34:23,782 INFO L231 Difference]: Finished difference. Result has 331 places, 1806 transitions, 53299 flow [2024-10-11 14:34:23,784 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=41878, PETRI_DIFFERENCE_MINUEND_PLACES=295, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1597, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1263, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=277, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=53299, PETRI_PLACES=331, PETRI_TRANSITIONS=1806} [2024-10-11 14:34:23,785 INFO L277 CegarLoopForPetriNet]: 23 programPoint places, 308 predicate places. [2024-10-11 14:34:23,786 INFO L471 AbstractCegarLoop]: Abstraction has has 331 places, 1806 transitions, 53299 flow [2024-10-11 14:34:23,786 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 6.1875) internal successors, (99), 16 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 14:34:23,786 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 14:34:23,786 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 14:34:23,804 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2024-10-11 14:34:23,987 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2024-10-11 14:34:23,987 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-11 14:34:23,987 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 14:34:23,987 INFO L85 PathProgramCache]: Analyzing trace with hash 403176601, now seen corresponding path program 11 times [2024-10-11 14:34:23,988 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 14:34:23,988 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [960507167] [2024-10-11 14:34:23,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 14:34:23,988 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 14:34:23,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 14:34:24,131 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 14:34:24,132 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 14:34:24,132 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [960507167] [2024-10-11 14:34:24,132 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [960507167] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-11 14:34:24,132 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [133117922] [2024-10-11 14:34:24,132 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-10-11 14:34:24,132 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 14:34:24,133 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 14:34:24,134 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-11 14:34:24,137 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-10-11 14:34:24,183 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2024-10-11 14:34:24,183 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-11 14:34:24,184 INFO L255 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-10-11 14:34:24,185 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 14:34:24,250 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 14:34:24,250 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-11 14:34:24,382 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 14:34:24,382 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [133117922] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-11 14:34:24,382 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-11 14:34:24,383 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 8] total 14 [2024-10-11 14:34:24,383 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [112654607] [2024-10-11 14:34:24,383 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-11 14:34:24,383 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-10-11 14:34:24,383 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 14:34:24,384 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-10-11 14:34:24,384 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=133, Unknown=0, NotChecked=0, Total=182 [2024-10-11 14:34:24,394 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 21 [2024-10-11 14:34:24,394 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 331 places, 1806 transitions, 53299 flow. Second operand has 14 states, 14 states have (on average 6.214285714285714) internal successors, (87), 14 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 14:34:24,394 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 14:34:24,394 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 21 [2024-10-11 14:34:24,394 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 14:34:30,357 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-10-11 14:34:33,940 INFO L124 PetriNetUnfolderBase]: 5927/10119 cut-off events. [2024-10-11 14:34:33,940 INFO L125 PetriNetUnfolderBase]: For 392358/392452 co-relation queries the response was YES. [2024-10-11 14:34:34,008 INFO L83 FinitePrefix]: Finished finitePrefix Result has 126105 conditions, 10119 events. 5927/10119 cut-off events. For 392358/392452 co-relation queries the response was YES. Maximal size of possible extension queue 509. Compared 69596 event pairs, 421 based on Foata normal form. 151/10262 useless extension candidates. Maximal degree in co-relation 125994. Up to 2797 conditions per place. [2024-10-11 14:34:34,077 INFO L140 encePairwiseOnDemand]: 13/21 looper letters, 1044 selfloop transitions, 1608 changer transitions 4/2690 dead transitions. [2024-10-11 14:34:34,077 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 363 places, 2690 transitions, 84961 flow [2024-10-11 14:34:34,078 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2024-10-11 14:34:34,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2024-10-11 14:34:34,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 313 transitions. [2024-10-11 14:34:34,079 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.45165945165945165 [2024-10-11 14:34:34,079 INFO L175 Difference]: Start difference. First operand has 331 places, 1806 transitions, 53299 flow. Second operand 33 states and 313 transitions. [2024-10-11 14:34:34,079 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 363 places, 2690 transitions, 84961 flow [2024-10-11 14:34:40,790 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 360 places, 2690 transitions, 83556 flow, removed 606 selfloop flow, removed 3 redundant places. [2024-10-11 14:34:40,846 INFO L231 Difference]: Finished difference. Result has 384 places, 2473 transitions, 79670 flow [2024-10-11 14:34:40,848 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=52319, PETRI_DIFFERENCE_MINUEND_PLACES=328, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1806, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=987, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=588, PETRI_DIFFERENCE_SUBTRAHEND_STATES=33, PETRI_FLOW=79670, PETRI_PLACES=384, PETRI_TRANSITIONS=2473} [2024-10-11 14:34:40,849 INFO L277 CegarLoopForPetriNet]: 23 programPoint places, 361 predicate places. [2024-10-11 14:34:40,849 INFO L471 AbstractCegarLoop]: Abstraction has has 384 places, 2473 transitions, 79670 flow [2024-10-11 14:34:40,849 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 6.214285714285714) internal successors, (87), 14 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 14:34:40,849 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 14:34:40,849 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 14:34:40,866 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2024-10-11 14:34:41,050 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2024-10-11 14:34:41,050 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-11 14:34:41,050 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 14:34:41,050 INFO L85 PathProgramCache]: Analyzing trace with hash -1722937067, now seen corresponding path program 12 times [2024-10-11 14:34:41,051 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 14:34:41,051 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1993783101] [2024-10-11 14:34:41,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 14:34:41,051 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 14:34:41,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 14:34:41,201 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 14:34:41,202 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 14:34:41,202 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1993783101] [2024-10-11 14:34:41,202 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1993783101] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-11 14:34:41,202 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1356206662] [2024-10-11 14:34:41,202 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-10-11 14:34:41,202 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 14:34:41,203 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 14:34:41,204 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-11 14:34:41,205 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-10-11 14:34:41,256 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2024-10-11 14:34:41,257 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-11 14:34:41,259 INFO L255 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-10-11 14:34:41,260 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 14:34:41,367 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 14:34:41,367 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-11 14:34:41,587 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 14:34:41,587 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1356206662] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-11 14:34:41,587 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-11 14:34:41,587 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 8] total 17 [2024-10-11 14:34:41,588 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1715300552] [2024-10-11 14:34:41,588 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-11 14:34:41,588 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-10-11 14:34:41,588 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 14:34:41,589 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-10-11 14:34:41,589 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=200, Unknown=0, NotChecked=0, Total=272 [2024-10-11 14:34:41,594 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 21 [2024-10-11 14:34:41,594 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 384 places, 2473 transitions, 79670 flow. Second operand has 17 states, 17 states have (on average 5.9411764705882355) internal successors, (101), 17 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 14:34:41,595 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 14:34:41,595 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 21 [2024-10-11 14:34:41,595 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 14:34:48,810 INFO L124 PetriNetUnfolderBase]: 6387/10933 cut-off events. [2024-10-11 14:34:48,810 INFO L125 PetriNetUnfolderBase]: For 458580/458678 co-relation queries the response was YES. [2024-10-11 14:34:48,895 INFO L83 FinitePrefix]: Finished finitePrefix Result has 144938 conditions, 10933 events. 6387/10933 cut-off events. For 458580/458678 co-relation queries the response was YES. Maximal size of possible extension queue 547. Compared 76335 event pairs, 572 based on Foata normal form. 83/10998 useless extension candidates. Maximal degree in co-relation 144805. Up to 3836 conditions per place. [2024-10-11 14:34:48,956 INFO L140 encePairwiseOnDemand]: 13/21 looper letters, 1195 selfloop transitions, 1517 changer transitions 2/2748 dead transitions. [2024-10-11 14:34:48,957 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 406 places, 2748 transitions, 92993 flow [2024-10-11 14:34:48,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2024-10-11 14:34:48,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2024-10-11 14:34:48,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 246 transitions. [2024-10-11 14:34:48,958 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.45054945054945056 [2024-10-11 14:34:48,958 INFO L175 Difference]: Start difference. First operand has 384 places, 2473 transitions, 79670 flow. Second operand 26 states and 246 transitions. [2024-10-11 14:34:48,958 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 406 places, 2748 transitions, 92993 flow [2024-10-11 14:34:57,492 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 397 places, 2748 transitions, 91337 flow, removed 194 selfloop flow, removed 9 redundant places. [2024-10-11 14:34:57,560 INFO L231 Difference]: Finished difference. Result has 408 places, 2633 transitions, 89146 flow [2024-10-11 14:34:57,562 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=77452, PETRI_DIFFERENCE_MINUEND_PLACES=372, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2452, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1337, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1005, PETRI_DIFFERENCE_SUBTRAHEND_STATES=26, PETRI_FLOW=89146, PETRI_PLACES=408, PETRI_TRANSITIONS=2633} [2024-10-11 14:34:57,562 INFO L277 CegarLoopForPetriNet]: 23 programPoint places, 385 predicate places. [2024-10-11 14:34:57,562 INFO L471 AbstractCegarLoop]: Abstraction has has 408 places, 2633 transitions, 89146 flow [2024-10-11 14:34:57,562 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 5.9411764705882355) internal successors, (101), 17 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 14:34:57,563 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 14:34:57,563 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 14:34:57,575 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2024-10-11 14:34:57,763 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2024-10-11 14:34:57,763 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-11 14:34:57,764 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 14:34:57,764 INFO L85 PathProgramCache]: Analyzing trace with hash -1690546735, now seen corresponding path program 13 times [2024-10-11 14:34:57,764 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 14:34:57,764 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [275586318] [2024-10-11 14:34:57,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 14:34:57,764 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 14:34:57,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 14:34:57,912 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 14:34:57,912 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 14:34:57,912 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [275586318] [2024-10-11 14:34:57,912 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [275586318] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-11 14:34:57,912 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [390874023] [2024-10-11 14:34:57,913 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-10-11 14:34:57,913 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 14:34:57,913 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 14:34:57,914 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-11 14:34:57,916 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-10-11 14:34:57,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 14:34:57,969 INFO L255 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-10-11 14:34:57,970 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 14:34:58,096 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 14:34:58,096 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-11 14:34:58,393 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 14:34:58,393 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [390874023] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-11 14:34:58,393 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-11 14:34:58,393 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 8] total 18 [2024-10-11 14:34:58,393 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [920844571] [2024-10-11 14:34:58,393 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-11 14:34:58,394 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-10-11 14:34:58,394 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 14:34:58,394 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-10-11 14:34:58,394 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=227, Unknown=0, NotChecked=0, Total=306 [2024-10-11 14:34:58,407 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 21 [2024-10-11 14:34:58,407 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 408 places, 2633 transitions, 89146 flow. Second operand has 18 states, 18 states have (on average 6.055555555555555) internal successors, (109), 18 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 14:34:58,408 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 14:34:58,408 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 21 [2024-10-11 14:34:58,408 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 14:35:06,312 INFO L124 PetriNetUnfolderBase]: 6450/11036 cut-off events. [2024-10-11 14:35:06,313 INFO L125 PetriNetUnfolderBase]: For 521481/521591 co-relation queries the response was YES. [2024-10-11 14:35:06,429 INFO L83 FinitePrefix]: Finished finitePrefix Result has 152753 conditions, 11036 events. 6450/11036 cut-off events. For 521481/521591 co-relation queries the response was YES. Maximal size of possible extension queue 541. Compared 77177 event pairs, 1132 based on Foata normal form. 28/11060 useless extension candidates. Maximal degree in co-relation 152616. Up to 6431 conditions per place. [2024-10-11 14:35:06,524 INFO L140 encePairwiseOnDemand]: 12/21 looper letters, 1410 selfloop transitions, 1236 changer transitions 4/2684 dead transitions. [2024-10-11 14:35:06,524 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 420 places, 2684 transitions, 95668 flow [2024-10-11 14:35:06,524 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-10-11 14:35:06,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-10-11 14:35:06,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 116 transitions. [2024-10-11 14:35:06,525 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4249084249084249 [2024-10-11 14:35:06,525 INFO L175 Difference]: Start difference. First operand has 408 places, 2633 transitions, 89146 flow. Second operand 13 states and 116 transitions. [2024-10-11 14:35:06,525 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 420 places, 2684 transitions, 95668 flow [2024-10-11 14:35:15,846 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 406 places, 2684 transitions, 95071 flow, removed 69 selfloop flow, removed 14 redundant places. [2024-10-11 14:35:15,917 INFO L231 Difference]: Finished difference. Result has 411 places, 2656 transitions, 94296 flow [2024-10-11 14:35:15,919 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=88364, PETRI_DIFFERENCE_MINUEND_PLACES=394, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2626, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1204, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1390, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=94296, PETRI_PLACES=411, PETRI_TRANSITIONS=2656} [2024-10-11 14:35:15,920 INFO L277 CegarLoopForPetriNet]: 23 programPoint places, 388 predicate places. [2024-10-11 14:35:15,920 INFO L471 AbstractCegarLoop]: Abstraction has has 411 places, 2656 transitions, 94296 flow [2024-10-11 14:35:15,920 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) [2024-10-11 14:35:15,920 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 14:35:15,920 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 14:35:15,936 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2024-10-11 14:35:16,124 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,14 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 14:35:16,125 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-11 14:35:16,125 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 14:35:16,125 INFO L85 PathProgramCache]: Analyzing trace with hash 1309968921, now seen corresponding path program 14 times [2024-10-11 14:35:16,125 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 14:35:16,125 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [7527962] [2024-10-11 14:35:16,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 14:35:16,125 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 14:35:16,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat