./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/weaver/popl20-figure1-alt.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 7724a2de Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../../../trunk/examples/svcomp/weaver/popl20-figure1-alt.wvr.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 3c66e95d4d33d89eed9ab2f285249dafeef639a3ca9f6d879b87b944d1b8c0ce --- Real Ultimate output --- This is Ultimate 0.2.4-tmp.fs.goblint-validation-7724a2d-m [2024-06-27 16:50:07,369 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-06-27 16:50:07,434 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-06-27 16:50:07,439 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-06-27 16:50:07,440 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-06-27 16:50:07,464 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-06-27 16:50:07,464 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-06-27 16:50:07,465 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-06-27 16:50:07,465 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-06-27 16:50:07,469 INFO L153 SettingsManager]: * Use memory slicer=true [2024-06-27 16:50:07,469 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-06-27 16:50:07,469 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-06-27 16:50:07,470 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-06-27 16:50:07,471 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-06-27 16:50:07,471 INFO L153 SettingsManager]: * Use SBE=true [2024-06-27 16:50:07,472 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-06-27 16:50:07,472 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-06-27 16:50:07,472 INFO L153 SettingsManager]: * sizeof long=4 [2024-06-27 16:50:07,472 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-06-27 16:50:07,472 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-06-27 16:50:07,473 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-06-27 16:50:07,473 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-06-27 16:50:07,473 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-06-27 16:50:07,473 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-06-27 16:50:07,474 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-06-27 16:50:07,474 INFO L153 SettingsManager]: * sizeof long double=12 [2024-06-27 16:50:07,474 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-06-27 16:50:07,474 INFO L153 SettingsManager]: * Use constant arrays=true [2024-06-27 16:50:07,475 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-06-27 16:50:07,475 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-06-27 16:50:07,476 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-06-27 16:50:07,476 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-06-27 16:50:07,476 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-27 16:50:07,476 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-06-27 16:50:07,477 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-06-27 16:50:07,477 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-06-27 16:50:07,477 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-06-27 16:50:07,477 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-06-27 16:50:07,477 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-06-27 16:50:07,477 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-06-27 16:50:07,478 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-06-27 16:50:07,478 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-06-27 16:50:07,478 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-06-27 16:50:07,478 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 3c66e95d4d33d89eed9ab2f285249dafeef639a3ca9f6d879b87b944d1b8c0ce [2024-06-27 16:50:07,698 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-06-27 16:50:07,719 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-06-27 16:50:07,721 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-06-27 16:50:07,722 INFO L270 PluginConnector]: Initializing CDTParser... [2024-06-27 16:50:07,722 INFO L274 PluginConnector]: CDTParser initialized [2024-06-27 16:50:07,723 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/popl20-figure1-alt.wvr.c [2024-06-27 16:50:08,876 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-06-27 16:50:09,066 INFO L384 CDTParser]: Found 1 translation units. [2024-06-27 16:50:09,067 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-figure1-alt.wvr.c [2024-06-27 16:50:09,090 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0634ba862/4df6f1ed810f4e39b83c37dc42c6c73e/FLAG4b4e73b12 [2024-06-27 16:50:09,109 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0634ba862/4df6f1ed810f4e39b83c37dc42c6c73e [2024-06-27 16:50:09,111 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-06-27 16:50:09,112 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-06-27 16:50:09,114 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-06-27 16:50:09,115 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-06-27 16:50:09,118 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-06-27 16:50:09,119 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.06 04:50:09" (1/1) ... [2024-06-27 16:50:09,120 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2e0fa73d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 04:50:09, skipping insertion in model container [2024-06-27 16:50:09,120 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.06 04:50:09" (1/1) ... [2024-06-27 16:50:09,139 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-06-27 16:50:09,297 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-figure1-alt.wvr.c[2113,2126] [2024-06-27 16:50:09,305 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-27 16:50:09,310 INFO L202 MainTranslator]: Completed pre-run [2024-06-27 16:50:09,333 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-figure1-alt.wvr.c[2113,2126] [2024-06-27 16:50:09,337 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-27 16:50:09,350 INFO L206 MainTranslator]: Completed translation [2024-06-27 16:50:09,351 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 04:50:09 WrapperNode [2024-06-27 16:50:09,351 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-06-27 16:50:09,353 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-06-27 16:50:09,353 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-06-27 16:50:09,353 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-06-27 16:50:09,358 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 04:50:09" (1/1) ... [2024-06-27 16:50:09,364 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 04:50:09" (1/1) ... [2024-06-27 16:50:09,384 INFO L138 Inliner]: procedures = 20, calls = 15, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 67 [2024-06-27 16:50:09,385 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-06-27 16:50:09,385 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-06-27 16:50:09,385 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-06-27 16:50:09,385 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-06-27 16:50:09,393 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 04:50:09" (1/1) ... [2024-06-27 16:50:09,394 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 04:50:09" (1/1) ... [2024-06-27 16:50:09,405 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 04:50:09" (1/1) ... [2024-06-27 16:50:09,425 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]. [2024-06-27 16:50:09,426 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 04:50:09" (1/1) ... [2024-06-27 16:50:09,426 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 04:50:09" (1/1) ... [2024-06-27 16:50:09,435 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 04:50:09" (1/1) ... [2024-06-27 16:50:09,438 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 04:50:09" (1/1) ... [2024-06-27 16:50:09,439 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 04:50:09" (1/1) ... [2024-06-27 16:50:09,440 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 04:50:09" (1/1) ... [2024-06-27 16:50:09,442 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-06-27 16:50:09,443 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-06-27 16:50:09,444 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-06-27 16:50:09,444 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-06-27 16:50:09,445 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 04:50:09" (1/1) ... [2024-06-27 16:50:09,449 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-27 16:50:09,456 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 16:50:09,469 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-06-27 16:50:09,504 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-06-27 16:50:09,526 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-06-27 16:50:09,526 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2024-06-27 16:50:09,526 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2024-06-27 16:50:09,527 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2024-06-27 16:50:09,527 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2024-06-27 16:50:09,527 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-06-27 16:50:09,527 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-06-27 16:50:09,528 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-06-27 16:50:09,528 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-06-27 16:50:09,528 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-06-27 16:50:09,530 WARN L214 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2024-06-27 16:50:09,597 INFO L244 CfgBuilder]: Building ICFG [2024-06-27 16:50:09,599 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-06-27 16:50:09,748 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-06-27 16:50:09,748 INFO L293 CfgBuilder]: Performing block encoding [2024-06-27 16:50:09,859 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-06-27 16:50:09,859 INFO L320 CfgBuilder]: Removed 2 assume(true) statements. [2024-06-27 16:50:09,860 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.06 04:50:09 BoogieIcfgContainer [2024-06-27 16:50:09,860 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-06-27 16:50:09,861 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-06-27 16:50:09,861 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-06-27 16:50:09,864 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-06-27 16:50:09,867 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.06 04:50:09" (1/3) ... [2024-06-27 16:50:09,868 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@f6ec391 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.06 04:50:09, skipping insertion in model container [2024-06-27 16:50:09,868 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 04:50:09" (2/3) ... [2024-06-27 16:50:09,868 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@f6ec391 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.06 04:50:09, skipping insertion in model container [2024-06-27 16:50:09,875 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.06 04:50:09" (3/3) ... [2024-06-27 16:50:09,877 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-figure1-alt.wvr.c [2024-06-27 16:50:09,883 WARN L146 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2024-06-27 16:50:09,891 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-06-27 16:50:09,891 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-06-27 16:50:09,891 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-06-27 16:50:09,943 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2024-06-27 16:50:09,967 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 27 places, 22 transitions, 58 flow [2024-06-27 16:50:10,000 INFO L124 PetriNetUnfolderBase]: 2/20 cut-off events. [2024-06-27 16:50:10,005 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-06-27 16:50:10,008 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29 conditions, 20 events. 2/20 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 20 event pairs, 0 based on Foata normal form. 0/17 useless extension candidates. Maximal degree in co-relation 15. Up to 2 conditions per place. [2024-06-27 16:50:10,008 INFO L82 GeneralOperation]: Start removeDead. Operand has 27 places, 22 transitions, 58 flow [2024-06-27 16:50:10,011 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 24 places, 19 transitions, 50 flow [2024-06-27 16:50:10,026 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-27 16:50:10,033 INFO L357 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, mHoare=true, 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;@2756bb9e, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-27 16:50:10,034 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2024-06-27 16:50:10,046 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-27 16:50:10,046 INFO L124 PetriNetUnfolderBase]: 2/18 cut-off events. [2024-06-27 16:50:10,046 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-06-27 16:50:10,046 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 16:50:10,047 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 16:50:10,048 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-06-27 16:50:10,054 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 16:50:10,054 INFO L85 PathProgramCache]: Analyzing trace with hash 570217615, now seen corresponding path program 1 times [2024-06-27 16:50:10,062 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 16:50:10,062 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1926917991] [2024-06-27 16:50:10,063 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:50:10,063 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 16:50:10,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:50:10,572 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 16:50:10,573 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 16:50:10,573 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1926917991] [2024-06-27 16:50:10,573 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1926917991] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 16:50:10,573 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 16:50:10,574 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 16:50:10,575 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [287833753] [2024-06-27 16:50:10,576 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 16:50:10,582 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 16:50:10,586 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 16:50:10,609 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 16:50:10,610 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-27 16:50:10,632 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 22 [2024-06-27 16:50:10,634 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 24 places, 19 transitions, 50 flow. Second operand has 7 states, 7 states have (on average 6.714285714285714) internal successors, (47), 7 states have internal predecessors, (47), 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) [2024-06-27 16:50:10,634 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 16:50:10,634 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 22 [2024-06-27 16:50:10,635 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 16:50:10,808 INFO L124 PetriNetUnfolderBase]: 78/172 cut-off events. [2024-06-27 16:50:10,808 INFO L125 PetriNetUnfolderBase]: For 25/25 co-relation queries the response was YES. [2024-06-27 16:50:10,809 INFO L83 FinitePrefix]: Finished finitePrefix Result has 351 conditions, 172 events. 78/172 cut-off events. For 25/25 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 603 event pairs, 21 based on Foata normal form. 8/179 useless extension candidates. Maximal degree in co-relation 289. Up to 93 conditions per place. [2024-06-27 16:50:10,811 INFO L140 encePairwiseOnDemand]: 14/22 looper letters, 30 selfloop transitions, 8 changer transitions 4/45 dead transitions. [2024-06-27 16:50:10,811 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 30 places, 45 transitions, 207 flow [2024-06-27 16:50:10,813 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 16:50:10,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 16:50:10,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 79 transitions. [2024-06-27 16:50:10,820 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.512987012987013 [2024-06-27 16:50:10,822 INFO L175 Difference]: Start difference. First operand has 24 places, 19 transitions, 50 flow. Second operand 7 states and 79 transitions. [2024-06-27 16:50:10,822 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 30 places, 45 transitions, 207 flow [2024-06-27 16:50:10,824 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 26 places, 45 transitions, 185 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-06-27 16:50:10,826 INFO L231 Difference]: Finished difference. Result has 31 places, 26 transitions, 97 flow [2024-06-27 16:50:10,827 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=42, PETRI_DIFFERENCE_MINUEND_PLACES=20, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=19, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=14, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=97, PETRI_PLACES=31, PETRI_TRANSITIONS=26} [2024-06-27 16:50:10,830 INFO L281 CegarLoopForPetriNet]: 24 programPoint places, 7 predicate places. [2024-06-27 16:50:10,830 INFO L495 AbstractCegarLoop]: Abstraction has has 31 places, 26 transitions, 97 flow [2024-06-27 16:50:10,830 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 6.714285714285714) internal successors, (47), 7 states have internal predecessors, (47), 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) [2024-06-27 16:50:10,830 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 16:50:10,830 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 16:50:10,830 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-06-27 16:50:10,831 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-06-27 16:50:10,831 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 16:50:10,831 INFO L85 PathProgramCache]: Analyzing trace with hash 1057667961, now seen corresponding path program 2 times [2024-06-27 16:50:10,831 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 16:50:10,832 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [869118519] [2024-06-27 16:50:10,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:50:10,832 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 16:50:10,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:50:11,082 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 16:50:11,083 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 16:50:11,083 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [869118519] [2024-06-27 16:50:11,083 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [869118519] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 16:50:11,084 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 16:50:11,084 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 16:50:11,084 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1841467983] [2024-06-27 16:50:11,084 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 16:50:11,085 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 16:50:11,085 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 16:50:11,086 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 16:50:11,087 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-27 16:50:11,101 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 22 [2024-06-27 16:50:11,101 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 31 places, 26 transitions, 97 flow. Second operand has 7 states, 7 states have (on average 6.714285714285714) internal successors, (47), 7 states have internal predecessors, (47), 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) [2024-06-27 16:50:11,101 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 16:50:11,101 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 22 [2024-06-27 16:50:11,101 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 16:50:11,182 INFO L124 PetriNetUnfolderBase]: 78/178 cut-off events. [2024-06-27 16:50:11,182 INFO L125 PetriNetUnfolderBase]: For 81/81 co-relation queries the response was YES. [2024-06-27 16:50:11,183 INFO L83 FinitePrefix]: Finished finitePrefix Result has 462 conditions, 178 events. 78/178 cut-off events. For 81/81 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 672 event pairs, 17 based on Foata normal form. 1/179 useless extension candidates. Maximal degree in co-relation 446. Up to 93 conditions per place. [2024-06-27 16:50:11,184 INFO L140 encePairwiseOnDemand]: 15/22 looper letters, 29 selfloop transitions, 8 changer transitions 9/49 dead transitions. [2024-06-27 16:50:11,184 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 36 places, 49 transitions, 267 flow [2024-06-27 16:50:11,184 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 16:50:11,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 16:50:11,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 78 transitions. [2024-06-27 16:50:11,185 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5064935064935064 [2024-06-27 16:50:11,185 INFO L175 Difference]: Start difference. First operand has 31 places, 26 transitions, 97 flow. Second operand 7 states and 78 transitions. [2024-06-27 16:50:11,185 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 36 places, 49 transitions, 267 flow [2024-06-27 16:50:11,187 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 35 places, 49 transitions, 263 flow, removed 2 selfloop flow, removed 1 redundant places. [2024-06-27 16:50:11,188 INFO L231 Difference]: Finished difference. Result has 39 places, 27 transitions, 131 flow [2024-06-27 16:50:11,188 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=95, PETRI_DIFFERENCE_MINUEND_PLACES=29, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=26, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=18, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=131, PETRI_PLACES=39, PETRI_TRANSITIONS=27} [2024-06-27 16:50:11,188 INFO L281 CegarLoopForPetriNet]: 24 programPoint places, 15 predicate places. [2024-06-27 16:50:11,188 INFO L495 AbstractCegarLoop]: Abstraction has has 39 places, 27 transitions, 131 flow [2024-06-27 16:50:11,189 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 6.714285714285714) internal successors, (47), 7 states have internal predecessors, (47), 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) [2024-06-27 16:50:11,189 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 16:50:11,189 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 16:50:11,189 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-06-27 16:50:11,189 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-06-27 16:50:11,190 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 16:50:11,190 INFO L85 PathProgramCache]: Analyzing trace with hash -62739223, now seen corresponding path program 3 times [2024-06-27 16:50:11,190 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 16:50:11,190 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [612292722] [2024-06-27 16:50:11,190 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:50:11,190 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 16:50:11,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:50:11,342 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 16:50:11,342 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 16:50:11,342 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [612292722] [2024-06-27 16:50:11,342 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [612292722] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 16:50:11,343 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 16:50:11,343 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 16:50:11,343 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1242574320] [2024-06-27 16:50:11,343 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 16:50:11,343 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 16:50:11,344 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 16:50:11,344 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 16:50:11,344 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2024-06-27 16:50:11,355 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 22 [2024-06-27 16:50:11,355 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 39 places, 27 transitions, 131 flow. Second operand has 7 states, 7 states have (on average 6.714285714285714) internal successors, (47), 7 states have internal predecessors, (47), 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) [2024-06-27 16:50:11,355 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 16:50:11,356 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 22 [2024-06-27 16:50:11,356 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 16:50:11,448 INFO L124 PetriNetUnfolderBase]: 81/178 cut-off events. [2024-06-27 16:50:11,448 INFO L125 PetriNetUnfolderBase]: For 220/220 co-relation queries the response was YES. [2024-06-27 16:50:11,449 INFO L83 FinitePrefix]: Finished finitePrefix Result has 558 conditions, 178 events. 81/178 cut-off events. For 220/220 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 635 event pairs, 25 based on Foata normal form. 1/178 useless extension candidates. Maximal degree in co-relation 538. Up to 97 conditions per place. [2024-06-27 16:50:11,450 INFO L140 encePairwiseOnDemand]: 15/22 looper letters, 28 selfloop transitions, 12 changer transitions 4/47 dead transitions. [2024-06-27 16:50:11,450 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 43 places, 47 transitions, 308 flow [2024-06-27 16:50:11,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 16:50:11,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 16:50:11,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 77 transitions. [2024-06-27 16:50:11,452 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5 [2024-06-27 16:50:11,452 INFO L175 Difference]: Start difference. First operand has 39 places, 27 transitions, 131 flow. Second operand 7 states and 77 transitions. [2024-06-27 16:50:11,452 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 43 places, 47 transitions, 308 flow [2024-06-27 16:50:11,453 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 39 places, 47 transitions, 287 flow, removed 5 selfloop flow, removed 4 redundant places. [2024-06-27 16:50:11,454 INFO L231 Difference]: Finished difference. Result has 43 places, 32 transitions, 194 flow [2024-06-27 16:50:11,454 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=117, PETRI_DIFFERENCE_MINUEND_PLACES=33, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=27, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=18, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=194, PETRI_PLACES=43, PETRI_TRANSITIONS=32} [2024-06-27 16:50:11,455 INFO L281 CegarLoopForPetriNet]: 24 programPoint places, 19 predicate places. [2024-06-27 16:50:11,455 INFO L495 AbstractCegarLoop]: Abstraction has has 43 places, 32 transitions, 194 flow [2024-06-27 16:50:11,455 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 6.714285714285714) internal successors, (47), 7 states have internal predecessors, (47), 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) [2024-06-27 16:50:11,455 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 16:50:11,455 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 16:50:11,456 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-06-27 16:50:11,456 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-06-27 16:50:11,456 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 16:50:11,456 INFO L85 PathProgramCache]: Analyzing trace with hash -917885125, now seen corresponding path program 4 times [2024-06-27 16:50:11,456 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 16:50:11,457 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2080483852] [2024-06-27 16:50:11,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:50:11,457 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 16:50:11,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:50:11,607 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 16:50:11,607 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 16:50:11,607 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2080483852] [2024-06-27 16:50:11,608 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2080483852] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 16:50:11,608 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 16:50:11,608 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 16:50:11,608 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1768170172] [2024-06-27 16:50:11,608 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 16:50:11,609 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 16:50:11,609 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 16:50:11,609 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 16:50:11,609 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-27 16:50:11,619 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 22 [2024-06-27 16:50:11,619 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 32 transitions, 194 flow. Second operand has 7 states, 7 states have (on average 6.714285714285714) internal successors, (47), 7 states have internal predecessors, (47), 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) [2024-06-27 16:50:11,619 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 16:50:11,619 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 22 [2024-06-27 16:50:11,619 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 16:50:11,695 INFO L124 PetriNetUnfolderBase]: 79/178 cut-off events. [2024-06-27 16:50:11,696 INFO L125 PetriNetUnfolderBase]: For 281/281 co-relation queries the response was YES. [2024-06-27 16:50:11,696 INFO L83 FinitePrefix]: Finished finitePrefix Result has 589 conditions, 178 events. 79/178 cut-off events. For 281/281 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 656 event pairs, 23 based on Foata normal form. 1/179 useless extension candidates. Maximal degree in co-relation 567. Up to 97 conditions per place. [2024-06-27 16:50:11,697 INFO L140 encePairwiseOnDemand]: 15/22 looper letters, 28 selfloop transitions, 14 changer transitions 5/50 dead transitions. [2024-06-27 16:50:11,697 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 50 transitions, 368 flow [2024-06-27 16:50:11,698 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 16:50:11,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 16:50:11,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 77 transitions. [2024-06-27 16:50:11,699 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5 [2024-06-27 16:50:11,699 INFO L175 Difference]: Start difference. First operand has 43 places, 32 transitions, 194 flow. Second operand 7 states and 77 transitions. [2024-06-27 16:50:11,699 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 50 transitions, 368 flow [2024-06-27 16:50:11,701 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 50 transitions, 346 flow, removed 4 selfloop flow, removed 3 redundant places. [2024-06-27 16:50:11,701 INFO L231 Difference]: Finished difference. Result has 48 places, 34 transitions, 241 flow [2024-06-27 16:50:11,702 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=176, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=32, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=18, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=241, PETRI_PLACES=48, PETRI_TRANSITIONS=34} [2024-06-27 16:50:11,702 INFO L281 CegarLoopForPetriNet]: 24 programPoint places, 24 predicate places. [2024-06-27 16:50:11,702 INFO L495 AbstractCegarLoop]: Abstraction has has 48 places, 34 transitions, 241 flow [2024-06-27 16:50:11,702 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 6.714285714285714) internal successors, (47), 7 states have internal predecessors, (47), 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) [2024-06-27 16:50:11,703 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 16:50:11,703 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 16:50:11,703 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-06-27 16:50:11,703 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-06-27 16:50:11,703 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 16:50:11,704 INFO L85 PathProgramCache]: Analyzing trace with hash -910085405, now seen corresponding path program 5 times [2024-06-27 16:50:11,704 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 16:50:11,704 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1442036339] [2024-06-27 16:50:11,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:50:11,704 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 16:50:11,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:50:11,829 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 16:50:11,830 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 16:50:11,830 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1442036339] [2024-06-27 16:50:11,830 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1442036339] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 16:50:11,830 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 16:50:11,830 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 16:50:11,831 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1745373005] [2024-06-27 16:50:11,831 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 16:50:11,831 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 16:50:11,831 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 16:50:11,832 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 16:50:11,832 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2024-06-27 16:50:11,852 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 22 [2024-06-27 16:50:11,852 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 48 places, 34 transitions, 241 flow. Second operand has 7 states, 7 states have (on average 6.714285714285714) internal successors, (47), 7 states have internal predecessors, (47), 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) [2024-06-27 16:50:11,852 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 16:50:11,853 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 22 [2024-06-27 16:50:11,853 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 16:50:11,928 INFO L124 PetriNetUnfolderBase]: 76/174 cut-off events. [2024-06-27 16:50:11,928 INFO L125 PetriNetUnfolderBase]: For 321/321 co-relation queries the response was YES. [2024-06-27 16:50:11,929 INFO L83 FinitePrefix]: Finished finitePrefix Result has 602 conditions, 174 events. 76/174 cut-off events. For 321/321 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 636 event pairs, 20 based on Foata normal form. 1/175 useless extension candidates. Maximal degree in co-relation 578. Up to 97 conditions per place. [2024-06-27 16:50:11,930 INFO L140 encePairwiseOnDemand]: 15/22 looper letters, 27 selfloop transitions, 13 changer transitions 7/50 dead transitions. [2024-06-27 16:50:11,930 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 50 transitions, 384 flow [2024-06-27 16:50:11,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 16:50:11,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 16:50:11,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 77 transitions. [2024-06-27 16:50:11,931 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5 [2024-06-27 16:50:11,931 INFO L175 Difference]: Start difference. First operand has 48 places, 34 transitions, 241 flow. Second operand 7 states and 77 transitions. [2024-06-27 16:50:11,931 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 50 transitions, 384 flow [2024-06-27 16:50:11,932 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 50 transitions, 327 flow, removed 7 selfloop flow, removed 9 redundant places. [2024-06-27 16:50:11,933 INFO L231 Difference]: Finished difference. Result has 46 places, 33 transitions, 211 flow [2024-06-27 16:50:11,952 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=187, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=34, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=211, PETRI_PLACES=46, PETRI_TRANSITIONS=33} [2024-06-27 16:50:11,952 INFO L281 CegarLoopForPetriNet]: 24 programPoint places, 22 predicate places. [2024-06-27 16:50:11,952 INFO L495 AbstractCegarLoop]: Abstraction has has 46 places, 33 transitions, 211 flow [2024-06-27 16:50:11,953 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 6.714285714285714) internal successors, (47), 7 states have internal predecessors, (47), 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) [2024-06-27 16:50:11,953 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 16:50:11,953 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 16:50:11,953 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-06-27 16:50:11,953 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-06-27 16:50:11,954 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 16:50:11,954 INFO L85 PathProgramCache]: Analyzing trace with hash -201267373, now seen corresponding path program 6 times [2024-06-27 16:50:11,954 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 16:50:11,954 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2013986106] [2024-06-27 16:50:11,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:50:11,954 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 16:50:11,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:50:12,073 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 16:50:12,073 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 16:50:12,074 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2013986106] [2024-06-27 16:50:12,074 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2013986106] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 16:50:12,074 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 16:50:12,074 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 16:50:12,074 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1727721383] [2024-06-27 16:50:12,074 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 16:50:12,075 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 16:50:12,075 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 16:50:12,075 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 16:50:12,075 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-27 16:50:12,087 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 22 [2024-06-27 16:50:12,087 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 33 transitions, 211 flow. Second operand has 7 states, 7 states have (on average 6.714285714285714) internal successors, (47), 7 states have internal predecessors, (47), 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) [2024-06-27 16:50:12,087 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 16:50:12,087 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 22 [2024-06-27 16:50:12,087 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 16:50:12,141 INFO L124 PetriNetUnfolderBase]: 73/159 cut-off events. [2024-06-27 16:50:12,141 INFO L125 PetriNetUnfolderBase]: For 242/242 co-relation queries the response was YES. [2024-06-27 16:50:12,141 INFO L83 FinitePrefix]: Finished finitePrefix Result has 530 conditions, 159 events. 73/159 cut-off events. For 242/242 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 544 event pairs, 22 based on Foata normal form. 1/159 useless extension candidates. Maximal degree in co-relation 513. Up to 97 conditions per place. [2024-06-27 16:50:12,142 INFO L140 encePairwiseOnDemand]: 15/22 looper letters, 21 selfloop transitions, 13 changer transitions 7/44 dead transitions. [2024-06-27 16:50:12,142 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 44 transitions, 328 flow [2024-06-27 16:50:12,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 16:50:12,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 16:50:12,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 71 transitions. [2024-06-27 16:50:12,143 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.461038961038961 [2024-06-27 16:50:12,143 INFO L175 Difference]: Start difference. First operand has 46 places, 33 transitions, 211 flow. Second operand 7 states and 71 transitions. [2024-06-27 16:50:12,143 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 44 transitions, 328 flow [2024-06-27 16:50:12,144 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 44 transitions, 296 flow, removed 3 selfloop flow, removed 6 redundant places. [2024-06-27 16:50:12,145 INFO L231 Difference]: Finished difference. Result has 45 places, 32 transitions, 200 flow [2024-06-27 16:50:12,145 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=181, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=20, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=200, PETRI_PLACES=45, PETRI_TRANSITIONS=32} [2024-06-27 16:50:12,145 INFO L281 CegarLoopForPetriNet]: 24 programPoint places, 21 predicate places. [2024-06-27 16:50:12,146 INFO L495 AbstractCegarLoop]: Abstraction has has 45 places, 32 transitions, 200 flow [2024-06-27 16:50:12,146 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 6.714285714285714) internal successors, (47), 7 states have internal predecessors, (47), 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) [2024-06-27 16:50:12,146 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 16:50:12,146 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 16:50:12,146 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-06-27 16:50:12,146 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-06-27 16:50:12,147 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 16:50:12,147 INFO L85 PathProgramCache]: Analyzing trace with hash 1917961257, now seen corresponding path program 1 times [2024-06-27 16:50:12,147 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 16:50:12,147 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1455880137] [2024-06-27 16:50:12,147 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:50:12,147 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 16:50:12,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:50:12,276 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 16:50:12,277 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 16:50:12,277 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1455880137] [2024-06-27 16:50:12,277 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1455880137] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 16:50:12,277 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [130045790] [2024-06-27 16:50:12,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:50:12,278 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:50:12,278 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 16:50:12,279 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-06-27 16:50:12,313 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-06-27 16:50:12,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:50:12,325 INFO L262 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 13 conjunts are in the unsatisfiable core [2024-06-27 16:50:12,328 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 16:50:12,512 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 16:50:12,512 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 16:50:12,649 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 16:50:12,649 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [130045790] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 16:50:12,650 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 16:50:12,650 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 23 [2024-06-27 16:50:12,650 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [32218796] [2024-06-27 16:50:12,650 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 16:50:12,650 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2024-06-27 16:50:12,651 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 16:50:12,651 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2024-06-27 16:50:12,652 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=434, Unknown=0, NotChecked=0, Total=552 [2024-06-27 16:50:12,657 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2024-06-27 16:50:12,657 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 32 transitions, 200 flow. Second operand has 24 states, 24 states have (on average 4.75) internal successors, (114), 24 states have internal predecessors, (114), 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) [2024-06-27 16:50:12,657 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 16:50:12,657 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2024-06-27 16:50:12,658 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 16:50:13,680 INFO L124 PetriNetUnfolderBase]: 363/692 cut-off events. [2024-06-27 16:50:13,681 INFO L125 PetriNetUnfolderBase]: For 388/388 co-relation queries the response was YES. [2024-06-27 16:50:13,682 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1841 conditions, 692 events. 363/692 cut-off events. For 388/388 co-relation queries the response was YES. Maximal size of possible extension queue 47. Compared 3104 event pairs, 14 based on Foata normal form. 17/709 useless extension candidates. Maximal degree in co-relation 1801. Up to 146 conditions per place. [2024-06-27 16:50:13,684 INFO L140 encePairwiseOnDemand]: 10/22 looper letters, 129 selfloop transitions, 78 changer transitions 16/224 dead transitions. [2024-06-27 16:50:13,684 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 81 places, 224 transitions, 1241 flow [2024-06-27 16:50:13,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2024-06-27 16:50:13,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2024-06-27 16:50:13,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 338 transitions. [2024-06-27 16:50:13,687 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3840909090909091 [2024-06-27 16:50:13,688 INFO L175 Difference]: Start difference. First operand has 45 places, 32 transitions, 200 flow. Second operand 40 states and 338 transitions. [2024-06-27 16:50:13,688 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 81 places, 224 transitions, 1241 flow [2024-06-27 16:50:13,689 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 224 transitions, 1189 flow, removed 7 selfloop flow, removed 5 redundant places. [2024-06-27 16:50:13,692 INFO L231 Difference]: Finished difference. Result has 83 places, 104 transitions, 613 flow [2024-06-27 16:50:13,693 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=172, PETRI_DIFFERENCE_MINUEND_PLACES=37, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=32, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=13, PETRI_DIFFERENCE_SUBTRAHEND_STATES=40, PETRI_FLOW=613, PETRI_PLACES=83, PETRI_TRANSITIONS=104} [2024-06-27 16:50:13,694 INFO L281 CegarLoopForPetriNet]: 24 programPoint places, 59 predicate places. [2024-06-27 16:50:13,694 INFO L495 AbstractCegarLoop]: Abstraction has has 83 places, 104 transitions, 613 flow [2024-06-27 16:50:13,694 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 4.75) internal successors, (114), 24 states have internal predecessors, (114), 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) [2024-06-27 16:50:13,694 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 16:50:13,694 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 16:50:13,708 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2024-06-27 16:50:13,905 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:50:13,906 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-06-27 16:50:13,907 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 16:50:13,907 INFO L85 PathProgramCache]: Analyzing trace with hash 1087897233, now seen corresponding path program 2 times [2024-06-27 16:50:13,907 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 16:50:13,907 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1905130785] [2024-06-27 16:50:13,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:50:13,907 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 16:50:13,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:50:14,081 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 16:50:14,081 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 16:50:14,081 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1905130785] [2024-06-27 16:50:14,082 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1905130785] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 16:50:14,082 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [49860934] [2024-06-27 16:50:14,082 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-06-27 16:50:14,082 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:50:14,082 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 16:50:14,083 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-06-27 16:50:14,114 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-06-27 16:50:14,123 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-06-27 16:50:14,124 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 16:50:14,124 INFO L262 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 13 conjunts are in the unsatisfiable core [2024-06-27 16:50:14,126 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 16:50:14,262 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 16:50:14,262 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 16:50:14,425 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 16:50:14,426 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [49860934] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 16:50:14,426 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 16:50:14,427 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 23 [2024-06-27 16:50:14,428 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [835435883] [2024-06-27 16:50:14,428 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 16:50:14,428 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2024-06-27 16:50:14,429 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 16:50:14,429 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2024-06-27 16:50:14,430 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=443, Unknown=0, NotChecked=0, Total=552 [2024-06-27 16:50:14,438 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2024-06-27 16:50:14,438 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 83 places, 104 transitions, 613 flow. Second operand has 24 states, 24 states have (on average 4.75) internal successors, (114), 24 states have internal predecessors, (114), 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) [2024-06-27 16:50:14,439 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 16:50:14,440 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2024-06-27 16:50:14,440 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 16:50:15,164 INFO L124 PetriNetUnfolderBase]: 465/885 cut-off events. [2024-06-27 16:50:15,165 INFO L125 PetriNetUnfolderBase]: For 915/915 co-relation queries the response was YES. [2024-06-27 16:50:15,167 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3022 conditions, 885 events. 465/885 cut-off events. For 915/915 co-relation queries the response was YES. Maximal size of possible extension queue 63. Compared 4326 event pairs, 26 based on Foata normal form. 2/887 useless extension candidates. Maximal degree in co-relation 2962. Up to 393 conditions per place. [2024-06-27 16:50:15,169 INFO L140 encePairwiseOnDemand]: 10/22 looper letters, 115 selfloop transitions, 119 changer transitions 9/244 dead transitions. [2024-06-27 16:50:15,169 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 113 places, 244 transitions, 1718 flow [2024-06-27 16:50:15,170 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2024-06-27 16:50:15,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2024-06-27 16:50:15,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 283 transitions. [2024-06-27 16:50:15,171 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36753246753246754 [2024-06-27 16:50:15,171 INFO L175 Difference]: Start difference. First operand has 83 places, 104 transitions, 613 flow. Second operand 35 states and 283 transitions. [2024-06-27 16:50:15,172 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 113 places, 244 transitions, 1718 flow [2024-06-27 16:50:15,178 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 109 places, 244 transitions, 1575 flow, removed 60 selfloop flow, removed 4 redundant places. [2024-06-27 16:50:15,184 INFO L231 Difference]: Finished difference. Result has 119 places, 159 transitions, 1170 flow [2024-06-27 16:50:15,184 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=532, PETRI_DIFFERENCE_MINUEND_PLACES=75, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=104, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=68, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=35, PETRI_FLOW=1170, PETRI_PLACES=119, PETRI_TRANSITIONS=159} [2024-06-27 16:50:15,186 INFO L281 CegarLoopForPetriNet]: 24 programPoint places, 95 predicate places. [2024-06-27 16:50:15,186 INFO L495 AbstractCegarLoop]: Abstraction has has 119 places, 159 transitions, 1170 flow [2024-06-27 16:50:15,186 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 4.75) internal successors, (114), 24 states have internal predecessors, (114), 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) [2024-06-27 16:50:15,186 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 16:50:15,187 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 16:50:15,216 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2024-06-27 16:50:15,400 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2024-06-27 16:50:15,400 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-06-27 16:50:15,401 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 16:50:15,401 INFO L85 PathProgramCache]: Analyzing trace with hash 1950934285, now seen corresponding path program 3 times [2024-06-27 16:50:15,401 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 16:50:15,401 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1435209178] [2024-06-27 16:50:15,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:50:15,401 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 16:50:15,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:50:15,534 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 16:50:15,534 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 16:50:15,534 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1435209178] [2024-06-27 16:50:15,534 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1435209178] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 16:50:15,534 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [806549912] [2024-06-27 16:50:15,534 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-06-27 16:50:15,534 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:50:15,534 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 16:50:15,557 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-06-27 16:50:15,558 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-06-27 16:50:15,594 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-06-27 16:50:15,595 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 16:50:15,595 INFO L262 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 13 conjunts are in the unsatisfiable core [2024-06-27 16:50:15,597 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 16:50:15,740 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 16:50:15,740 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 16:50:15,876 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 16:50:15,876 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [806549912] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 16:50:15,876 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 16:50:15,876 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 23 [2024-06-27 16:50:15,876 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1060907499] [2024-06-27 16:50:15,876 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 16:50:15,877 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2024-06-27 16:50:15,877 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 16:50:15,877 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2024-06-27 16:50:15,877 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=436, Unknown=0, NotChecked=0, Total=552 [2024-06-27 16:50:15,891 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2024-06-27 16:50:15,891 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 119 places, 159 transitions, 1170 flow. Second operand has 24 states, 24 states have (on average 4.75) internal successors, (114), 24 states have internal predecessors, (114), 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) [2024-06-27 16:50:15,891 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 16:50:15,891 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2024-06-27 16:50:15,891 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 16:50:17,234 INFO L124 PetriNetUnfolderBase]: 728/1389 cut-off events. [2024-06-27 16:50:17,234 INFO L125 PetriNetUnfolderBase]: For 2882/2882 co-relation queries the response was YES. [2024-06-27 16:50:17,238 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5549 conditions, 1389 events. 728/1389 cut-off events. For 2882/2882 co-relation queries the response was YES. Maximal size of possible extension queue 105. Compared 7646 event pairs, 22 based on Foata normal form. 2/1389 useless extension candidates. Maximal degree in co-relation 5513. Up to 254 conditions per place. [2024-06-27 16:50:17,243 INFO L140 encePairwiseOnDemand]: 10/22 looper letters, 183 selfloop transitions, 242 changer transitions 11/437 dead transitions. [2024-06-27 16:50:17,243 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 180 places, 437 transitions, 3579 flow [2024-06-27 16:50:17,244 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2024-06-27 16:50:17,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2024-06-27 16:50:17,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 509 transitions. [2024-06-27 16:50:17,247 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3615056818181818 [2024-06-27 16:50:17,247 INFO L175 Difference]: Start difference. First operand has 119 places, 159 transitions, 1170 flow. Second operand 64 states and 509 transitions. [2024-06-27 16:50:17,247 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 180 places, 437 transitions, 3579 flow [2024-06-27 16:50:17,264 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 174 places, 437 transitions, 3502 flow, removed 17 selfloop flow, removed 6 redundant places. [2024-06-27 16:50:17,270 INFO L231 Difference]: Finished difference. Result has 191 places, 280 transitions, 2690 flow [2024-06-27 16:50:17,271 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=1112, PETRI_DIFFERENCE_MINUEND_PLACES=111, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=159, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=125, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=64, PETRI_FLOW=2690, PETRI_PLACES=191, PETRI_TRANSITIONS=280} [2024-06-27 16:50:17,272 INFO L281 CegarLoopForPetriNet]: 24 programPoint places, 167 predicate places. [2024-06-27 16:50:17,272 INFO L495 AbstractCegarLoop]: Abstraction has has 191 places, 280 transitions, 2690 flow [2024-06-27 16:50:17,272 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 4.75) internal successors, (114), 24 states have internal predecessors, (114), 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) [2024-06-27 16:50:17,272 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 16:50:17,272 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 16:50:17,294 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2024-06-27 16:50:17,484 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:50:17,484 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-06-27 16:50:17,484 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 16:50:17,485 INFO L85 PathProgramCache]: Analyzing trace with hash 1818662245, now seen corresponding path program 4 times [2024-06-27 16:50:17,485 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 16:50:17,485 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [928937942] [2024-06-27 16:50:17,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:50:17,485 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 16:50:17,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:50:17,627 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 16:50:17,627 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 16:50:17,627 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [928937942] [2024-06-27 16:50:17,627 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [928937942] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 16:50:17,627 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [45081593] [2024-06-27 16:50:17,627 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-06-27 16:50:17,628 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:50:17,628 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 16:50:17,632 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-06-27 16:50:17,660 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-06-27 16:50:17,669 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-06-27 16:50:17,669 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 16:50:17,670 INFO L262 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 13 conjunts are in the unsatisfiable core [2024-06-27 16:50:17,671 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 16:50:17,789 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 16:50:17,789 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 16:50:17,906 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 16:50:17,907 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [45081593] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 16:50:17,907 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 16:50:17,907 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 23 [2024-06-27 16:50:17,907 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [452168149] [2024-06-27 16:50:17,907 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 16:50:17,909 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2024-06-27 16:50:17,909 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 16:50:17,910 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2024-06-27 16:50:17,910 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=440, Unknown=0, NotChecked=0, Total=552 [2024-06-27 16:50:17,918 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2024-06-27 16:50:17,918 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 191 places, 280 transitions, 2690 flow. Second operand has 24 states, 24 states have (on average 4.791666666666667) internal successors, (115), 24 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 16:50:17,918 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 16:50:17,918 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2024-06-27 16:50:17,918 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 16:50:19,638 INFO L124 PetriNetUnfolderBase]: 991/1844 cut-off events. [2024-06-27 16:50:19,638 INFO L125 PetriNetUnfolderBase]: For 14220/14220 co-relation queries the response was YES. [2024-06-27 16:50:19,645 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10042 conditions, 1844 events. 991/1844 cut-off events. For 14220/14220 co-relation queries the response was YES. Maximal size of possible extension queue 134. Compared 10429 event pairs, 29 based on Foata normal form. 2/1842 useless extension candidates. Maximal degree in co-relation 9731. Up to 351 conditions per place. [2024-06-27 16:50:19,653 INFO L140 encePairwiseOnDemand]: 9/22 looper letters, 191 selfloop transitions, 335 changer transitions 10/537 dead transitions. [2024-06-27 16:50:19,654 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 250 places, 537 transitions, 5738 flow [2024-06-27 16:50:19,654 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2024-06-27 16:50:19,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2024-06-27 16:50:19,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 523 transitions. [2024-06-27 16:50:19,657 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37144886363636365 [2024-06-27 16:50:19,657 INFO L175 Difference]: Start difference. First operand has 191 places, 280 transitions, 2690 flow. Second operand 64 states and 523 transitions. [2024-06-27 16:50:19,657 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 250 places, 537 transitions, 5738 flow [2024-06-27 16:50:19,724 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 242 places, 537 transitions, 5418 flow, removed 98 selfloop flow, removed 8 redundant places. [2024-06-27 16:50:19,732 INFO L231 Difference]: Finished difference. Result has 253 places, 383 transitions, 4190 flow [2024-06-27 16:50:19,732 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=2422, PETRI_DIFFERENCE_MINUEND_PLACES=179, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=278, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=232, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=64, PETRI_FLOW=4190, PETRI_PLACES=253, PETRI_TRANSITIONS=383} [2024-06-27 16:50:19,733 INFO L281 CegarLoopForPetriNet]: 24 programPoint places, 229 predicate places. [2024-06-27 16:50:19,733 INFO L495 AbstractCegarLoop]: Abstraction has has 253 places, 383 transitions, 4190 flow [2024-06-27 16:50:19,735 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 4.791666666666667) internal successors, (115), 24 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 16:50:19,735 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 16:50:19,735 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 16:50:19,762 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2024-06-27 16:50:19,946 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:50:19,946 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-06-27 16:50:19,947 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 16:50:19,947 INFO L85 PathProgramCache]: Analyzing trace with hash 1703561549, now seen corresponding path program 5 times [2024-06-27 16:50:19,947 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 16:50:19,947 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1220031044] [2024-06-27 16:50:19,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:50:19,948 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 16:50:19,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:50:20,071 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 16:50:20,072 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 16:50:20,073 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1220031044] [2024-06-27 16:50:20,073 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1220031044] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 16:50:20,073 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1074999859] [2024-06-27 16:50:20,073 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-06-27 16:50:20,074 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:50:20,075 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 16:50:20,089 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-06-27 16:50:20,125 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-06-27 16:50:20,175 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-06-27 16:50:20,175 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 16:50:20,176 INFO L262 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 13 conjunts are in the unsatisfiable core [2024-06-27 16:50:20,177 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 16:50:20,281 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 16:50:20,281 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 16:50:20,399 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 16:50:20,399 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1074999859] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 16:50:20,399 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 16:50:20,400 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 23 [2024-06-27 16:50:20,401 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2087946308] [2024-06-27 16:50:20,401 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 16:50:20,402 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2024-06-27 16:50:20,403 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 16:50:20,403 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2024-06-27 16:50:20,403 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=133, Invalid=419, Unknown=0, NotChecked=0, Total=552 [2024-06-27 16:50:20,410 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2024-06-27 16:50:20,410 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 253 places, 383 transitions, 4190 flow. Second operand has 24 states, 24 states have (on average 4.75) internal successors, (114), 24 states have internal predecessors, (114), 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) [2024-06-27 16:50:20,411 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 16:50:20,411 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2024-06-27 16:50:20,411 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 16:50:20,881 INFO L124 PetriNetUnfolderBase]: 1001/1870 cut-off events. [2024-06-27 16:50:20,881 INFO L125 PetriNetUnfolderBase]: For 17915/17915 co-relation queries the response was YES. [2024-06-27 16:50:20,889 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11523 conditions, 1870 events. 1001/1870 cut-off events. For 17915/17915 co-relation queries the response was YES. Maximal size of possible extension queue 133. Compared 10655 event pairs, 73 based on Foata normal form. 2/1868 useless extension candidates. Maximal degree in co-relation 11189. Up to 1184 conditions per place. [2024-06-27 16:50:20,899 INFO L140 encePairwiseOnDemand]: 11/22 looper letters, 179 selfloop transitions, 246 changer transitions 8/434 dead transitions. [2024-06-27 16:50:20,899 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 268 places, 434 transitions, 5421 flow [2024-06-27 16:50:20,900 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2024-06-27 16:50:20,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2024-06-27 16:50:20,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 147 transitions. [2024-06-27 16:50:20,904 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35167464114832536 [2024-06-27 16:50:20,905 INFO L175 Difference]: Start difference. First operand has 253 places, 383 transitions, 4190 flow. Second operand 19 states and 147 transitions. [2024-06-27 16:50:20,905 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 268 places, 434 transitions, 5421 flow [2024-06-27 16:50:20,989 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 246 places, 434 transitions, 5104 flow, removed 71 selfloop flow, removed 22 redundant places. [2024-06-27 16:50:20,996 INFO L231 Difference]: Finished difference. Result has 254 places, 395 transitions, 4878 flow [2024-06-27 16:50:20,997 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=3926, PETRI_DIFFERENCE_MINUEND_PLACES=228, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=383, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=234, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=145, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=4878, PETRI_PLACES=254, PETRI_TRANSITIONS=395} [2024-06-27 16:50:20,998 INFO L281 CegarLoopForPetriNet]: 24 programPoint places, 230 predicate places. [2024-06-27 16:50:20,998 INFO L495 AbstractCegarLoop]: Abstraction has has 254 places, 395 transitions, 4878 flow [2024-06-27 16:50:20,998 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 4.75) internal successors, (114), 24 states have internal predecessors, (114), 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) [2024-06-27 16:50:20,998 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 16:50:20,998 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 16:50:21,025 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2024-06-27 16:50:21,225 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2024-06-27 16:50:21,225 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-06-27 16:50:21,226 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 16:50:21,227 INFO L85 PathProgramCache]: Analyzing trace with hash -442609211, now seen corresponding path program 6 times [2024-06-27 16:50:21,227 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 16:50:21,227 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [727846829] [2024-06-27 16:50:21,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:50:21,227 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 16:50:21,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:50:21,364 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 16:50:21,365 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 16:50:21,365 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [727846829] [2024-06-27 16:50:21,365 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [727846829] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 16:50:21,365 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1658588211] [2024-06-27 16:50:21,365 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-06-27 16:50:21,365 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:50:21,365 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 16:50:21,366 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-06-27 16:50:21,368 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-06-27 16:50:21,410 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2024-06-27 16:50:21,410 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 16:50:21,411 INFO L262 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 13 conjunts are in the unsatisfiable core [2024-06-27 16:50:21,411 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 16:50:21,579 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 16:50:21,579 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 16:50:21,711 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 16:50:21,712 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1658588211] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 16:50:21,712 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 16:50:21,712 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 24 [2024-06-27 16:50:21,712 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [898766335] [2024-06-27 16:50:21,712 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 16:50:21,712 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2024-06-27 16:50:21,713 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 16:50:21,713 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2024-06-27 16:50:21,713 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=462, Unknown=0, NotChecked=0, Total=600 [2024-06-27 16:50:21,720 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2024-06-27 16:50:21,720 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 254 places, 395 transitions, 4878 flow. Second operand has 25 states, 25 states have (on average 4.68) internal successors, (117), 25 states have internal predecessors, (117), 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) [2024-06-27 16:50:21,721 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 16:50:21,721 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2024-06-27 16:50:21,721 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 16:50:22,384 INFO L124 PetriNetUnfolderBase]: 1016/1903 cut-off events. [2024-06-27 16:50:22,385 INFO L125 PetriNetUnfolderBase]: For 15584/15584 co-relation queries the response was YES. [2024-06-27 16:50:22,394 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12226 conditions, 1903 events. 1016/1903 cut-off events. For 15584/15584 co-relation queries the response was YES. Maximal size of possible extension queue 135. Compared 10896 event pairs, 84 based on Foata normal form. 2/1905 useless extension candidates. Maximal degree in co-relation 12164. Up to 1240 conditions per place. [2024-06-27 16:50:22,409 INFO L140 encePairwiseOnDemand]: 11/22 looper letters, 189 selfloop transitions, 252 changer transitions 8/450 dead transitions. [2024-06-27 16:50:22,410 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 275 places, 450 transitions, 6125 flow [2024-06-27 16:50:22,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2024-06-27 16:50:22,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2024-06-27 16:50:22,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 177 transitions. [2024-06-27 16:50:22,411 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3352272727272727 [2024-06-27 16:50:22,411 INFO L175 Difference]: Start difference. First operand has 254 places, 395 transitions, 4878 flow. Second operand 24 states and 177 transitions. [2024-06-27 16:50:22,411 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 275 places, 450 transitions, 6125 flow [2024-06-27 16:50:22,501 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 270 places, 450 transitions, 6057 flow, removed 2 selfloop flow, removed 5 redundant places. [2024-06-27 16:50:22,507 INFO L231 Difference]: Finished difference. Result has 277 places, 406 transitions, 5786 flow [2024-06-27 16:50:22,507 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=4813, PETRI_DIFFERENCE_MINUEND_PLACES=247, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=395, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=241, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=149, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=5786, PETRI_PLACES=277, PETRI_TRANSITIONS=406} [2024-06-27 16:50:22,508 INFO L281 CegarLoopForPetriNet]: 24 programPoint places, 253 predicate places. [2024-06-27 16:50:22,509 INFO L495 AbstractCegarLoop]: Abstraction has has 277 places, 406 transitions, 5786 flow [2024-06-27 16:50:22,509 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 4.68) internal successors, (117), 25 states have internal predecessors, (117), 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) [2024-06-27 16:50:22,509 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 16:50:22,509 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 16:50:22,522 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2024-06-27 16:50:22,720 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:50:22,721 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-06-27 16:50:22,722 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 16:50:22,723 INFO L85 PathProgramCache]: Analyzing trace with hash -269361519, now seen corresponding path program 7 times [2024-06-27 16:50:22,723 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 16:50:22,723 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [704770150] [2024-06-27 16:50:22,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:50:22,723 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 16:50:22,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:50:22,849 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 16:50:22,849 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 16:50:22,851 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [704770150] [2024-06-27 16:50:22,851 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [704770150] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 16:50:22,852 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [706376132] [2024-06-27 16:50:22,852 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-06-27 16:50:22,852 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:50:22,852 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 16:50:22,853 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-06-27 16:50:22,889 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-06-27 16:50:22,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:50:22,924 INFO L262 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 13 conjunts are in the unsatisfiable core [2024-06-27 16:50:22,925 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 16:50:23,059 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 16:50:23,060 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 16:50:23,179 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 16:50:23,180 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [706376132] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 16:50:23,180 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 16:50:23,180 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 24 [2024-06-27 16:50:23,180 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [479239838] [2024-06-27 16:50:23,180 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 16:50:23,181 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2024-06-27 16:50:23,181 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 16:50:23,182 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2024-06-27 16:50:23,182 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=464, Unknown=0, NotChecked=0, Total=600 [2024-06-27 16:50:23,188 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2024-06-27 16:50:23,189 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 277 places, 406 transitions, 5786 flow. Second operand has 25 states, 25 states have (on average 4.68) internal successors, (117), 25 states have internal predecessors, (117), 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) [2024-06-27 16:50:23,189 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 16:50:23,189 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2024-06-27 16:50:23,189 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 16:50:23,769 INFO L124 PetriNetUnfolderBase]: 1037/1958 cut-off events. [2024-06-27 16:50:23,769 INFO L125 PetriNetUnfolderBase]: For 19215/19215 co-relation queries the response was YES. [2024-06-27 16:50:23,779 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13680 conditions, 1958 events. 1037/1958 cut-off events. For 19215/19215 co-relation queries the response was YES. Maximal size of possible extension queue 139. Compared 11422 event pairs, 84 based on Foata normal form. 2/1960 useless extension candidates. Maximal degree in co-relation 13613. Up to 1317 conditions per place. [2024-06-27 16:50:23,789 INFO L140 encePairwiseOnDemand]: 11/22 looper letters, 193 selfloop transitions, 257 changer transitions 8/459 dead transitions. [2024-06-27 16:50:23,790 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 295 places, 459 transitions, 7128 flow [2024-06-27 16:50:23,790 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2024-06-27 16:50:23,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2024-06-27 16:50:23,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 158 transitions. [2024-06-27 16:50:23,791 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.341991341991342 [2024-06-27 16:50:23,791 INFO L175 Difference]: Start difference. First operand has 277 places, 406 transitions, 5786 flow. Second operand 21 states and 158 transitions. [2024-06-27 16:50:23,791 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 295 places, 459 transitions, 7128 flow [2024-06-27 16:50:23,889 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 283 places, 459 transitions, 7060 flow, removed 4 selfloop flow, removed 12 redundant places. [2024-06-27 16:50:23,895 INFO L231 Difference]: Finished difference. Result has 291 places, 422 transitions, 6954 flow [2024-06-27 16:50:23,895 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=5718, PETRI_DIFFERENCE_MINUEND_PLACES=263, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=406, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=241, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=151, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=6954, PETRI_PLACES=291, PETRI_TRANSITIONS=422} [2024-06-27 16:50:23,896 INFO L281 CegarLoopForPetriNet]: 24 programPoint places, 267 predicate places. [2024-06-27 16:50:23,896 INFO L495 AbstractCegarLoop]: Abstraction has has 291 places, 422 transitions, 6954 flow [2024-06-27 16:50:23,896 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 4.68) internal successors, (117), 25 states have internal predecessors, (117), 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) [2024-06-27 16:50:23,896 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 16:50:23,896 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 16:50:23,908 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2024-06-27 16:50:24,107 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:50:24,108 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-06-27 16:50:24,109 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 16:50:24,109 INFO L85 PathProgramCache]: Analyzing trace with hash 318383803, now seen corresponding path program 8 times [2024-06-27 16:50:24,109 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 16:50:24,109 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [606670647] [2024-06-27 16:50:24,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:50:24,109 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 16:50:24,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:50:24,221 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 16:50:24,222 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 16:50:24,222 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [606670647] [2024-06-27 16:50:24,222 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [606670647] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 16:50:24,222 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [975079213] [2024-06-27 16:50:24,222 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-06-27 16:50:24,222 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:50:24,223 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 16:50:24,223 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-06-27 16:50:24,249 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-06-27 16:50:24,258 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-06-27 16:50:24,259 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 16:50:24,259 INFO L262 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 13 conjunts are in the unsatisfiable core [2024-06-27 16:50:24,261 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 16:50:24,418 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 16:50:24,419 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 16:50:24,553 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 16:50:24,553 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [975079213] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 16:50:24,553 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 16:50:24,553 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 24 [2024-06-27 16:50:24,553 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [71017469] [2024-06-27 16:50:24,554 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 16:50:24,554 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2024-06-27 16:50:24,554 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 16:50:24,554 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2024-06-27 16:50:24,555 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=475, Unknown=0, NotChecked=0, Total=600 [2024-06-27 16:50:24,560 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2024-06-27 16:50:24,560 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 291 places, 422 transitions, 6954 flow. Second operand has 25 states, 25 states have (on average 4.68) internal successors, (117), 25 states have internal predecessors, (117), 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) [2024-06-27 16:50:24,560 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 16:50:24,560 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2024-06-27 16:50:24,564 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 16:50:25,296 INFO L124 PetriNetUnfolderBase]: 1043/1976 cut-off events. [2024-06-27 16:50:25,297 INFO L125 PetriNetUnfolderBase]: For 23675/23675 co-relation queries the response was YES. [2024-06-27 16:50:25,306 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15142 conditions, 1976 events. 1043/1976 cut-off events. For 23675/23675 co-relation queries the response was YES. Maximal size of possible extension queue 139. Compared 11558 event pairs, 85 based on Foata normal form. 2/1978 useless extension candidates. Maximal degree in co-relation 15070. Up to 1218 conditions per place. [2024-06-27 16:50:25,313 INFO L140 encePairwiseOnDemand]: 11/22 looper letters, 171 selfloop transitions, 293 changer transitions 8/473 dead transitions. [2024-06-27 16:50:25,313 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 315 places, 473 transitions, 8237 flow [2024-06-27 16:50:25,313 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2024-06-27 16:50:25,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2024-06-27 16:50:25,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 191 transitions. [2024-06-27 16:50:25,314 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.32154882154882153 [2024-06-27 16:50:25,314 INFO L175 Difference]: Start difference. First operand has 291 places, 422 transitions, 6954 flow. Second operand 27 states and 191 transitions. [2024-06-27 16:50:25,314 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 315 places, 473 transitions, 8237 flow [2024-06-27 16:50:25,436 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 302 places, 473 transitions, 8128 flow, removed 7 selfloop flow, removed 13 redundant places. [2024-06-27 16:50:25,443 INFO L231 Difference]: Finished difference. Result has 309 places, 432 transitions, 7906 flow [2024-06-27 16:50:25,443 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=6852, PETRI_DIFFERENCE_MINUEND_PLACES=276, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=422, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=283, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=136, PETRI_DIFFERENCE_SUBTRAHEND_STATES=27, PETRI_FLOW=7906, PETRI_PLACES=309, PETRI_TRANSITIONS=432} [2024-06-27 16:50:25,444 INFO L281 CegarLoopForPetriNet]: 24 programPoint places, 285 predicate places. [2024-06-27 16:50:25,444 INFO L495 AbstractCegarLoop]: Abstraction has has 309 places, 432 transitions, 7906 flow [2024-06-27 16:50:25,444 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 4.68) internal successors, (117), 25 states have internal predecessors, (117), 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) [2024-06-27 16:50:25,444 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 16:50:25,444 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 16:50:25,455 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2024-06-27 16:50:25,646 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2024-06-27 16:50:25,646 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-06-27 16:50:25,646 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 16:50:25,647 INFO L85 PathProgramCache]: Analyzing trace with hash -1289931379, now seen corresponding path program 9 times [2024-06-27 16:50:25,647 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 16:50:25,647 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1629634403] [2024-06-27 16:50:25,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:50:25,647 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 16:50:25,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:50:25,748 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 16:50:25,748 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 16:50:25,748 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1629634403] [2024-06-27 16:50:25,748 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1629634403] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 16:50:25,748 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [815346318] [2024-06-27 16:50:25,749 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-06-27 16:50:25,749 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:50:25,749 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 16:50:25,750 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-06-27 16:50:25,752 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-06-27 16:50:25,783 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-06-27 16:50:25,783 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 16:50:25,783 INFO L262 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 13 conjunts are in the unsatisfiable core [2024-06-27 16:50:25,784 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 16:50:25,907 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 16:50:25,907 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 16:50:26,021 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 16:50:26,022 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [815346318] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 16:50:26,022 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 16:50:26,022 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 24 [2024-06-27 16:50:26,023 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [502180930] [2024-06-27 16:50:26,023 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 16:50:26,024 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2024-06-27 16:50:26,028 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 16:50:26,028 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2024-06-27 16:50:26,029 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=471, Unknown=0, NotChecked=0, Total=600 [2024-06-27 16:50:26,038 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2024-06-27 16:50:26,039 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 309 places, 432 transitions, 7906 flow. Second operand has 25 states, 25 states have (on average 4.68) internal successors, (117), 25 states have internal predecessors, (117), 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) [2024-06-27 16:50:26,039 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 16:50:26,039 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2024-06-27 16:50:26,039 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 16:50:26,619 INFO L124 PetriNetUnfolderBase]: 1048/1991 cut-off events. [2024-06-27 16:50:26,619 INFO L125 PetriNetUnfolderBase]: For 29199/29199 co-relation queries the response was YES. [2024-06-27 16:50:26,629 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16401 conditions, 1991 events. 1048/1991 cut-off events. For 29199/29199 co-relation queries the response was YES. Maximal size of possible extension queue 140. Compared 11717 event pairs, 90 based on Foata normal form. 2/1993 useless extension candidates. Maximal degree in co-relation 16324. Up to 1228 conditions per place. [2024-06-27 16:50:26,638 INFO L140 encePairwiseOnDemand]: 11/22 looper letters, 194 selfloop transitions, 266 changer transitions 8/469 dead transitions. [2024-06-27 16:50:26,638 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 325 places, 469 transitions, 9121 flow [2024-06-27 16:50:26,638 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2024-06-27 16:50:26,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2024-06-27 16:50:26,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 141 transitions. [2024-06-27 16:50:26,639 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3373205741626794 [2024-06-27 16:50:26,639 INFO L175 Difference]: Start difference. First operand has 309 places, 432 transitions, 7906 flow. Second operand 19 states and 141 transitions. [2024-06-27 16:50:26,639 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 325 places, 469 transitions, 9121 flow [2024-06-27 16:50:26,786 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 311 places, 469 transitions, 8888 flow, removed 7 selfloop flow, removed 14 redundant places. [2024-06-27 16:50:26,794 INFO L231 Difference]: Finished difference. Result has 318 places, 437 transitions, 8641 flow [2024-06-27 16:50:26,794 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=7673, PETRI_DIFFERENCE_MINUEND_PLACES=293, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=432, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=261, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=168, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=8641, PETRI_PLACES=318, PETRI_TRANSITIONS=437} [2024-06-27 16:50:26,795 INFO L281 CegarLoopForPetriNet]: 24 programPoint places, 294 predicate places. [2024-06-27 16:50:26,795 INFO L495 AbstractCegarLoop]: Abstraction has has 318 places, 437 transitions, 8641 flow [2024-06-27 16:50:26,795 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 4.68) internal successors, (117), 25 states have internal predecessors, (117), 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) [2024-06-27 16:50:26,795 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 16:50:26,795 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 16:50:26,806 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2024-06-27 16:50:27,006 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2024-06-27 16:50:27,006 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-06-27 16:50:27,006 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 16:50:27,006 INFO L85 PathProgramCache]: Analyzing trace with hash -1696274949, now seen corresponding path program 10 times [2024-06-27 16:50:27,006 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 16:50:27,006 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1601344745] [2024-06-27 16:50:27,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:50:27,007 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 16:50:27,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:50:27,143 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 16:50:27,144 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 16:50:27,145 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1601344745] [2024-06-27 16:50:27,146 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1601344745] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 16:50:27,146 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1238172142] [2024-06-27 16:50:27,146 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-06-27 16:50:27,146 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:50:27,146 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 16:50:27,161 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-06-27 16:50:27,163 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-06-27 16:50:27,199 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-06-27 16:50:27,199 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 16:50:27,200 INFO L262 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 13 conjunts are in the unsatisfiable core [2024-06-27 16:50:27,201 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 16:50:27,365 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 16:50:27,366 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 16:50:27,513 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 16:50:27,514 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1238172142] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 16:50:27,514 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 16:50:27,514 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 24 [2024-06-27 16:50:27,514 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [249804181] [2024-06-27 16:50:27,514 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 16:50:27,514 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2024-06-27 16:50:27,514 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 16:50:27,514 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2024-06-27 16:50:27,515 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=483, Unknown=0, NotChecked=0, Total=600 [2024-06-27 16:50:27,516 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2024-06-27 16:50:27,517 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 318 places, 437 transitions, 8641 flow. Second operand has 25 states, 25 states have (on average 4.68) internal successors, (117), 25 states have internal predecessors, (117), 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) [2024-06-27 16:50:27,517 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 16:50:27,517 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2024-06-27 16:50:27,517 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 16:50:29,419 INFO L124 PetriNetUnfolderBase]: 1354/2540 cut-off events. [2024-06-27 16:50:29,419 INFO L125 PetriNetUnfolderBase]: For 47723/47723 co-relation queries the response was YES. [2024-06-27 16:50:29,431 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22194 conditions, 2540 events. 1354/2540 cut-off events. For 47723/47723 co-relation queries the response was YES. Maximal size of possible extension queue 173. Compared 15579 event pairs, 80 based on Foata normal form. 3/2543 useless extension candidates. Maximal degree in co-relation 22112. Up to 971 conditions per place. [2024-06-27 16:50:29,466 INFO L140 encePairwiseOnDemand]: 9/22 looper letters, 253 selfloop transitions, 437 changer transitions 14/705 dead transitions. [2024-06-27 16:50:29,467 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 367 places, 705 transitions, 13948 flow [2024-06-27 16:50:29,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2024-06-27 16:50:29,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2024-06-27 16:50:29,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 416 transitions. [2024-06-27 16:50:29,470 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36363636363636365 [2024-06-27 16:50:29,470 INFO L175 Difference]: Start difference. First operand has 318 places, 437 transitions, 8641 flow. Second operand 52 states and 416 transitions. [2024-06-27 16:50:29,470 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 367 places, 705 transitions, 13948 flow [2024-06-27 16:50:29,743 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 358 places, 705 transitions, 13688 flow, removed 10 selfloop flow, removed 9 redundant places. [2024-06-27 16:50:29,754 INFO L231 Difference]: Finished difference. Result has 379 places, 590 transitions, 12945 flow [2024-06-27 16:50:29,754 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=8405, PETRI_DIFFERENCE_MINUEND_PLACES=307, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=437, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=305, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=103, PETRI_DIFFERENCE_SUBTRAHEND_STATES=52, PETRI_FLOW=12945, PETRI_PLACES=379, PETRI_TRANSITIONS=590} [2024-06-27 16:50:29,755 INFO L281 CegarLoopForPetriNet]: 24 programPoint places, 355 predicate places. [2024-06-27 16:50:29,755 INFO L495 AbstractCegarLoop]: Abstraction has has 379 places, 590 transitions, 12945 flow [2024-06-27 16:50:29,755 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 4.68) internal successors, (117), 25 states have internal predecessors, (117), 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) [2024-06-27 16:50:29,755 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 16:50:29,755 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 16:50:29,766 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2024-06-27 16:50:29,966 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2024-06-27 16:50:29,966 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-06-27 16:50:29,967 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 16:50:29,967 INFO L85 PathProgramCache]: Analyzing trace with hash 145136111, now seen corresponding path program 11 times [2024-06-27 16:50:29,967 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 16:50:29,967 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1718083217] [2024-06-27 16:50:29,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:50:29,967 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 16:50:29,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:50:30,085 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 16:50:30,085 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 16:50:30,085 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1718083217] [2024-06-27 16:50:30,085 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1718083217] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 16:50:30,085 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [206074428] [2024-06-27 16:50:30,085 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-06-27 16:50:30,086 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:50:30,086 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 16:50:30,087 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-06-27 16:50:30,124 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-06-27 16:50:30,156 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-06-27 16:50:30,156 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 16:50:30,157 INFO L262 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 13 conjunts are in the unsatisfiable core [2024-06-27 16:50:30,158 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 16:50:30,292 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 16:50:30,292 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 16:50:30,408 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 16:50:30,408 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [206074428] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 16:50:30,408 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 16:50:30,409 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 24 [2024-06-27 16:50:30,409 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [978088224] [2024-06-27 16:50:30,409 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 16:50:30,409 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2024-06-27 16:50:30,410 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 16:50:30,410 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2024-06-27 16:50:30,410 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=470, Unknown=0, NotChecked=0, Total=600 [2024-06-27 16:50:30,416 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2024-06-27 16:50:30,416 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 379 places, 590 transitions, 12945 flow. Second operand has 25 states, 25 states have (on average 4.68) internal successors, (117), 25 states have internal predecessors, (117), 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) [2024-06-27 16:50:30,416 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 16:50:30,416 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2024-06-27 16:50:30,416 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 16:50:31,480 INFO L124 PetriNetUnfolderBase]: 1349/2533 cut-off events. [2024-06-27 16:50:31,481 INFO L125 PetriNetUnfolderBase]: For 67570/67570 co-relation queries the response was YES. [2024-06-27 16:50:31,497 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25157 conditions, 2533 events. 1349/2533 cut-off events. For 67570/67570 co-relation queries the response was YES. Maximal size of possible extension queue 171. Compared 15540 event pairs, 87 based on Foata normal form. 1/2534 useless extension candidates. Maximal degree in co-relation 25053. Up to 1632 conditions per place. [2024-06-27 16:50:31,507 INFO L140 encePairwiseOnDemand]: 11/22 looper letters, 271 selfloop transitions, 354 changer transitions 4/630 dead transitions. [2024-06-27 16:50:31,508 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 402 places, 630 transitions, 14457 flow [2024-06-27 16:50:31,508 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2024-06-27 16:50:31,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2024-06-27 16:50:31,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 188 transitions. [2024-06-27 16:50:31,509 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3164983164983165 [2024-06-27 16:50:31,509 INFO L175 Difference]: Start difference. First operand has 379 places, 590 transitions, 12945 flow. Second operand 27 states and 188 transitions. [2024-06-27 16:50:31,509 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 402 places, 630 transitions, 14457 flow [2024-06-27 16:50:32,001 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 385 places, 630 transitions, 13773 flow, removed 280 selfloop flow, removed 17 redundant places. [2024-06-27 16:50:32,014 INFO L231 Difference]: Finished difference. Result has 387 places, 593 transitions, 13078 flow [2024-06-27 16:50:32,015 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=12273, PETRI_DIFFERENCE_MINUEND_PLACES=359, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=590, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=351, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=239, PETRI_DIFFERENCE_SUBTRAHEND_STATES=27, PETRI_FLOW=13078, PETRI_PLACES=387, PETRI_TRANSITIONS=593} [2024-06-27 16:50:32,016 INFO L281 CegarLoopForPetriNet]: 24 programPoint places, 363 predicate places. [2024-06-27 16:50:32,016 INFO L495 AbstractCegarLoop]: Abstraction has has 387 places, 593 transitions, 13078 flow [2024-06-27 16:50:32,016 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 4.68) internal successors, (117), 25 states have internal predecessors, (117), 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) [2024-06-27 16:50:32,016 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 16:50:32,017 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 16:50:32,029 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2024-06-27 16:50:32,227 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2024-06-27 16:50:32,227 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-06-27 16:50:32,228 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 16:50:32,228 INFO L85 PathProgramCache]: Analyzing trace with hash -1557746799, now seen corresponding path program 12 times [2024-06-27 16:50:32,228 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 16:50:32,228 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1698601138] [2024-06-27 16:50:32,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:50:32,228 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 16:50:32,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:50:32,369 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 16:50:32,369 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 16:50:32,369 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1698601138] [2024-06-27 16:50:32,369 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1698601138] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 16:50:32,369 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1713804738] [2024-06-27 16:50:32,370 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-06-27 16:50:32,370 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:50:32,370 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 16:50:32,371 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-06-27 16:50:32,393 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-06-27 16:50:32,406 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2024-06-27 16:50:32,406 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 16:50:32,407 INFO L262 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 13 conjunts are in the unsatisfiable core [2024-06-27 16:50:32,409 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 16:50:32,566 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 16:50:32,567 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 16:50:32,702 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 16:50:32,703 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1713804738] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 16:50:32,703 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 16:50:32,703 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 24 [2024-06-27 16:50:32,703 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [84579153] [2024-06-27 16:50:32,703 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 16:50:32,703 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2024-06-27 16:50:32,703 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 16:50:32,703 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2024-06-27 16:50:32,704 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=481, Unknown=0, NotChecked=0, Total=600 [2024-06-27 16:50:32,706 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2024-06-27 16:50:32,706 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 387 places, 593 transitions, 13078 flow. Second operand has 25 states, 25 states have (on average 4.68) internal successors, (117), 25 states have internal predecessors, (117), 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) [2024-06-27 16:50:32,706 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 16:50:32,706 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2024-06-27 16:50:32,706 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 16:50:34,767 INFO L124 PetriNetUnfolderBase]: 1459/2742 cut-off events. [2024-06-27 16:50:34,767 INFO L125 PetriNetUnfolderBase]: For 66596/66596 co-relation queries the response was YES. [2024-06-27 16:50:34,787 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26193 conditions, 2742 events. 1459/2742 cut-off events. For 66596/66596 co-relation queries the response was YES. Maximal size of possible extension queue 188. Compared 17185 event pairs, 81 based on Foata normal form. 3/2745 useless extension candidates. Maximal degree in co-relation 26090. Up to 1117 conditions per place. [2024-06-27 16:50:34,800 INFO L140 encePairwiseOnDemand]: 10/22 looper letters, 232 selfloop transitions, 509 changer transitions 13/755 dead transitions. [2024-06-27 16:50:34,801 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 446 places, 755 transitions, 16337 flow [2024-06-27 16:50:34,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2024-06-27 16:50:34,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2024-06-27 16:50:34,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 445 transitions. [2024-06-27 16:50:34,802 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3315946348733234 [2024-06-27 16:50:34,803 INFO L175 Difference]: Start difference. First operand has 387 places, 593 transitions, 13078 flow. Second operand 61 states and 445 transitions. [2024-06-27 16:50:34,803 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 446 places, 755 transitions, 16337 flow [2024-06-27 16:50:35,168 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 423 places, 755 transitions, 16163 flow, removed 6 selfloop flow, removed 23 redundant places. [2024-06-27 16:50:35,180 INFO L231 Difference]: Finished difference. Result has 432 places, 659 transitions, 15527 flow [2024-06-27 16:50:35,181 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=12904, PETRI_DIFFERENCE_MINUEND_PLACES=363, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=593, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=445, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=132, PETRI_DIFFERENCE_SUBTRAHEND_STATES=61, PETRI_FLOW=15527, PETRI_PLACES=432, PETRI_TRANSITIONS=659} [2024-06-27 16:50:35,181 INFO L281 CegarLoopForPetriNet]: 24 programPoint places, 408 predicate places. [2024-06-27 16:50:35,181 INFO L495 AbstractCegarLoop]: Abstraction has has 432 places, 659 transitions, 15527 flow [2024-06-27 16:50:35,181 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 4.68) internal successors, (117), 25 states have internal predecessors, (117), 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) [2024-06-27 16:50:35,181 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 16:50:35,182 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 16:50:35,195 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2024-06-27 16:50:35,392 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2024-06-27 16:50:35,392 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-06-27 16:50:35,393 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 16:50:35,393 INFO L85 PathProgramCache]: Analyzing trace with hash 1018876791, now seen corresponding path program 13 times [2024-06-27 16:50:35,393 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 16:50:35,393 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [284074376] [2024-06-27 16:50:35,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:50:35,393 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 16:50:35,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:50:35,534 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 16:50:35,534 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 16:50:35,534 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [284074376] [2024-06-27 16:50:35,534 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [284074376] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 16:50:35,534 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1144968473] [2024-06-27 16:50:35,535 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-06-27 16:50:35,535 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:50:35,535 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 16:50:35,536 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-06-27 16:50:35,537 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-06-27 16:50:35,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:50:35,581 INFO L262 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 13 conjunts are in the unsatisfiable core [2024-06-27 16:50:35,582 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 16:50:35,758 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 16:50:35,758 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 16:50:35,889 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 16:50:35,890 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1144968473] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 16:50:35,890 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 16:50:35,890 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 24 [2024-06-27 16:50:35,890 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [461740820] [2024-06-27 16:50:35,890 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 16:50:35,890 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2024-06-27 16:50:35,890 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 16:50:35,891 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2024-06-27 16:50:35,891 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=483, Unknown=0, NotChecked=0, Total=600 [2024-06-27 16:50:35,898 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2024-06-27 16:50:35,898 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 432 places, 659 transitions, 15527 flow. Second operand has 25 states, 25 states have (on average 4.68) internal successors, (117), 25 states have internal predecessors, (117), 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) [2024-06-27 16:50:35,898 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 16:50:35,898 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2024-06-27 16:50:35,898 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 16:50:37,365 INFO L124 PetriNetUnfolderBase]: 1461/2739 cut-off events. [2024-06-27 16:50:37,365 INFO L125 PetriNetUnfolderBase]: For 77893/77893 co-relation queries the response was YES. [2024-06-27 16:50:37,383 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28169 conditions, 2739 events. 1461/2739 cut-off events. For 77893/77893 co-relation queries the response was YES. Maximal size of possible extension queue 188. Compared 17124 event pairs, 84 based on Foata normal form. 3/2742 useless extension candidates. Maximal degree in co-relation 28062. Up to 1417 conditions per place. [2024-06-27 16:50:37,395 INFO L140 encePairwiseOnDemand]: 10/22 looper letters, 278 selfloop transitions, 451 changer transitions 14/744 dead transitions. [2024-06-27 16:50:37,395 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 469 places, 744 transitions, 17681 flow [2024-06-27 16:50:37,395 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2024-06-27 16:50:37,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2024-06-27 16:50:37,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 331 transitions. [2024-06-27 16:50:37,396 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.33434343434343433 [2024-06-27 16:50:37,396 INFO L175 Difference]: Start difference. First operand has 432 places, 659 transitions, 15527 flow. Second operand 45 states and 331 transitions. [2024-06-27 16:50:37,396 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 469 places, 744 transitions, 17681 flow [2024-06-27 16:50:37,905 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 452 places, 744 transitions, 17347 flow, removed 113 selfloop flow, removed 17 redundant places. [2024-06-27 16:50:37,918 INFO L231 Difference]: Finished difference. Result has 461 places, 671 transitions, 16939 flow [2024-06-27 16:50:37,919 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=15195, PETRI_DIFFERENCE_MINUEND_PLACES=408, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=657, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=435, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=211, PETRI_DIFFERENCE_SUBTRAHEND_STATES=45, PETRI_FLOW=16939, PETRI_PLACES=461, PETRI_TRANSITIONS=671} [2024-06-27 16:50:37,920 INFO L281 CegarLoopForPetriNet]: 24 programPoint places, 437 predicate places. [2024-06-27 16:50:37,920 INFO L495 AbstractCegarLoop]: Abstraction has has 461 places, 671 transitions, 16939 flow [2024-06-27 16:50:37,920 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 4.68) internal successors, (117), 25 states have internal predecessors, (117), 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) [2024-06-27 16:50:37,920 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 16:50:37,920 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 16:50:37,932 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2024-06-27 16:50:38,130 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:50:38,130 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-06-27 16:50:38,130 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 16:50:38,130 INFO L85 PathProgramCache]: Analyzing trace with hash -1643399008, now seen corresponding path program 1 times [2024-06-27 16:50:38,130 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 16:50:38,130 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1565633552] [2024-06-27 16:50:38,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:50:38,130 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 16:50:38,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:50:38,270 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 16:50:38,270 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 16:50:38,270 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1565633552] [2024-06-27 16:50:38,270 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1565633552] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 16:50:38,270 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1378626869] [2024-06-27 16:50:38,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:50:38,271 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:50:38,271 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 16:50:38,292 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-06-27 16:50:38,307 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2024-06-27 16:50:38,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:50:38,341 INFO L262 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 17 conjunts are in the unsatisfiable core [2024-06-27 16:50:38,342 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 16:50:38,480 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 16:50:38,480 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 16:50:38,633 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 16:50:38,633 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1378626869] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 16:50:38,633 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 16:50:38,633 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 28 [2024-06-27 16:50:38,633 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1658290620] [2024-06-27 16:50:38,633 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 16:50:38,633 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2024-06-27 16:50:38,634 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 16:50:38,634 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2024-06-27 16:50:38,634 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=683, Unknown=0, NotChecked=0, Total=812 [2024-06-27 16:50:38,641 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2024-06-27 16:50:38,641 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 461 places, 671 transitions, 16939 flow. Second operand has 29 states, 29 states have (on average 4.482758620689655) internal successors, (130), 29 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 16:50:38,641 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 16:50:38,641 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2024-06-27 16:50:38,641 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 16:50:39,971 INFO L124 PetriNetUnfolderBase]: 1467/2744 cut-off events. [2024-06-27 16:50:39,972 INFO L125 PetriNetUnfolderBase]: For 93218/93218 co-relation queries the response was YES. [2024-06-27 16:50:39,993 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30060 conditions, 2744 events. 1467/2744 cut-off events. For 93218/93218 co-relation queries the response was YES. Maximal size of possible extension queue 186. Compared 17096 event pairs, 91 based on Foata normal form. 2/2746 useless extension candidates. Maximal degree in co-relation 29947. Up to 920 conditions per place. [2024-06-27 16:50:40,007 INFO L140 encePairwiseOnDemand]: 10/22 looper letters, 298 selfloop transitions, 448 changer transitions 24/771 dead transitions. [2024-06-27 16:50:40,007 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 494 places, 771 transitions, 19375 flow [2024-06-27 16:50:40,008 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2024-06-27 16:50:40,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2024-06-27 16:50:40,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 320 transitions. [2024-06-27 16:50:40,009 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3827751196172249 [2024-06-27 16:50:40,009 INFO L175 Difference]: Start difference. First operand has 461 places, 671 transitions, 16939 flow. Second operand 38 states and 320 transitions. [2024-06-27 16:50:40,009 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 494 places, 771 transitions, 19375 flow [2024-06-27 16:50:40,633 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 466 places, 771 transitions, 18949 flow, removed 57 selfloop flow, removed 28 redundant places. [2024-06-27 16:50:40,646 INFO L231 Difference]: Finished difference. Result has 472 places, 670 transitions, 17475 flow [2024-06-27 16:50:40,647 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=16522, PETRI_DIFFERENCE_MINUEND_PLACES=429, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=671, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=444, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=225, PETRI_DIFFERENCE_SUBTRAHEND_STATES=38, PETRI_FLOW=17475, PETRI_PLACES=472, PETRI_TRANSITIONS=670} [2024-06-27 16:50:40,647 INFO L281 CegarLoopForPetriNet]: 24 programPoint places, 448 predicate places. [2024-06-27 16:50:40,647 INFO L495 AbstractCegarLoop]: Abstraction has has 472 places, 670 transitions, 17475 flow [2024-06-27 16:50:40,648 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 4.482758620689655) internal successors, (130), 29 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 16:50:40,648 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 16:50:40,648 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 16:50:40,659 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2024-06-27 16:50:40,859 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:50:40,859 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-06-27 16:50:40,860 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 16:50:40,860 INFO L85 PathProgramCache]: Analyzing trace with hash 638272561, now seen corresponding path program 14 times [2024-06-27 16:50:40,860 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 16:50:40,860 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1103936300] [2024-06-27 16:50:40,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:50:40,860 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 16:50:40,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:50:41,010 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 16:50:41,010 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 16:50:41,010 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1103936300] [2024-06-27 16:50:41,010 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1103936300] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 16:50:41,011 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [617434373] [2024-06-27 16:50:41,011 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-06-27 16:50:41,011 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:50:41,011 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 16:50:41,012 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-06-27 16:50:41,037 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2024-06-27 16:50:41,050 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-06-27 16:50:41,050 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 16:50:41,051 INFO L262 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 17 conjunts are in the unsatisfiable core [2024-06-27 16:50:41,052 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 16:50:41,253 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 16:50:41,253 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 16:50:41,437 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 16:50:41,438 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [617434373] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 16:50:41,438 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 16:50:41,438 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 30 [2024-06-27 16:50:41,438 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1780671197] [2024-06-27 16:50:41,438 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 16:50:41,438 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2024-06-27 16:50:41,439 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 16:50:41,439 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2024-06-27 16:50:41,452 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=796, Unknown=0, NotChecked=0, Total=930 [2024-06-27 16:50:41,461 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2024-06-27 16:50:41,462 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 472 places, 670 transitions, 17475 flow. Second operand has 31 states, 31 states have (on average 4.645161290322581) internal successors, (144), 31 states have internal predecessors, (144), 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) [2024-06-27 16:50:41,462 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 16:50:41,462 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2024-06-27 16:50:41,462 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 16:50:47,630 INFO L124 PetriNetUnfolderBase]: 3132/5806 cut-off events. [2024-06-27 16:50:47,630 INFO L125 PetriNetUnfolderBase]: For 244251/244251 co-relation queries the response was YES. [2024-06-27 16:50:47,673 INFO L83 FinitePrefix]: Finished finitePrefix Result has 67491 conditions, 5806 events. 3132/5806 cut-off events. For 244251/244251 co-relation queries the response was YES. Maximal size of possible extension queue 390. Compared 41595 event pairs, 109 based on Foata normal form. 91/5897 useless extension candidates. Maximal degree in co-relation 67197. Up to 1530 conditions per place. [2024-06-27 16:50:47,699 INFO L140 encePairwiseOnDemand]: 10/22 looper letters, 532 selfloop transitions, 1174 changer transitions 42/1749 dead transitions. [2024-06-27 16:50:47,699 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 626 places, 1749 transitions, 44948 flow [2024-06-27 16:50:47,699 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 165 states. [2024-06-27 16:50:47,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 165 states. [2024-06-27 16:50:47,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 1307 transitions. [2024-06-27 16:50:47,701 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3600550964187328 [2024-06-27 16:50:47,702 INFO L175 Difference]: Start difference. First operand has 472 places, 670 transitions, 17475 flow. Second operand 165 states and 1307 transitions. [2024-06-27 16:50:47,702 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 626 places, 1749 transitions, 44948 flow [2024-06-27 16:50:49,234 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 596 places, 1749 transitions, 43135 flow, removed 130 selfloop flow, removed 30 redundant places. [2024-06-27 16:50:49,260 INFO L231 Difference]: Finished difference. Result has 659 places, 1374 transitions, 39774 flow [2024-06-27 16:50:49,260 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=16658, PETRI_DIFFERENCE_MINUEND_PLACES=432, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=670, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=534, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=93, PETRI_DIFFERENCE_SUBTRAHEND_STATES=165, PETRI_FLOW=39774, PETRI_PLACES=659, PETRI_TRANSITIONS=1374} [2024-06-27 16:50:49,261 INFO L281 CegarLoopForPetriNet]: 24 programPoint places, 635 predicate places. [2024-06-27 16:50:49,261 INFO L495 AbstractCegarLoop]: Abstraction has has 659 places, 1374 transitions, 39774 flow [2024-06-27 16:50:49,261 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 4.645161290322581) internal successors, (144), 31 states have internal predecessors, (144), 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) [2024-06-27 16:50:49,261 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 16:50:49,261 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 16:50:49,276 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2024-06-27 16:50:49,464 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:50:49,464 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-06-27 16:50:49,465 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 16:50:49,465 INFO L85 PathProgramCache]: Analyzing trace with hash 506000521, now seen corresponding path program 15 times [2024-06-27 16:50:49,465 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 16:50:49,465 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2076115834] [2024-06-27 16:50:49,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:50:49,465 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 16:50:49,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:50:49,622 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 16:50:49,623 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 16:50:49,623 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2076115834] [2024-06-27 16:50:49,623 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2076115834] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 16:50:49,623 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1243826164] [2024-06-27 16:50:49,623 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-06-27 16:50:49,623 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:50:49,624 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 16:50:49,624 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-06-27 16:50:49,626 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2024-06-27 16:50:49,659 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-06-27 16:50:49,659 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 16:50:49,660 INFO L262 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 17 conjunts are in the unsatisfiable core [2024-06-27 16:50:49,661 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 16:50:49,876 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 16:50:49,876 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 16:50:50,069 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 16:50:50,069 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1243826164] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 16:50:50,069 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 16:50:50,069 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 30 [2024-06-27 16:50:50,069 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [741916516] [2024-06-27 16:50:50,070 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 16:50:50,070 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2024-06-27 16:50:50,070 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 16:50:50,070 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2024-06-27 16:50:50,071 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=137, Invalid=793, Unknown=0, NotChecked=0, Total=930 [2024-06-27 16:50:50,081 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2024-06-27 16:50:50,082 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 659 places, 1374 transitions, 39774 flow. Second operand has 31 states, 31 states have (on average 4.67741935483871) internal successors, (145), 31 states have internal predecessors, (145), 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) [2024-06-27 16:50:50,082 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 16:50:50,082 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2024-06-27 16:50:50,082 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 16:50:57,627 INFO L124 PetriNetUnfolderBase]: 4423/7986 cut-off events. [2024-06-27 16:50:57,627 INFO L125 PetriNetUnfolderBase]: For 774430/774430 co-relation queries the response was YES. [2024-06-27 16:50:57,758 INFO L83 FinitePrefix]: Finished finitePrefix Result has 113147 conditions, 7986 events. 4423/7986 cut-off events. For 774430/774430 co-relation queries the response was YES. Maximal size of possible extension queue 489. Compared 57057 event pairs, 107 based on Foata normal form. 16/8002 useless extension candidates. Maximal degree in co-relation 112971. Up to 2363 conditions per place. [2024-06-27 16:50:57,807 INFO L140 encePairwiseOnDemand]: 9/22 looper letters, 620 selfloop transitions, 1577 changer transitions 31/2229 dead transitions. [2024-06-27 16:50:57,808 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 785 places, 2229 transitions, 65945 flow [2024-06-27 16:50:57,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 134 states. [2024-06-27 16:50:57,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 134 states. [2024-06-27 16:50:57,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 1109 transitions. [2024-06-27 16:50:57,810 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37618724559023065 [2024-06-27 16:50:57,810 INFO L175 Difference]: Start difference. First operand has 659 places, 1374 transitions, 39774 flow. Second operand 134 states and 1109 transitions. [2024-06-27 16:50:57,810 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 785 places, 2229 transitions, 65945 flow [2024-06-27 16:51:04,949 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 758 places, 2229 transitions, 63151 flow, removed 1236 selfloop flow, removed 27 redundant places. [2024-06-27 16:51:04,993 INFO L231 Difference]: Finished difference. Result has 779 places, 1870 transitions, 56300 flow [2024-06-27 16:51:04,995 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=37355, PETRI_DIFFERENCE_MINUEND_PLACES=625, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1369, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1113, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=229, PETRI_DIFFERENCE_SUBTRAHEND_STATES=134, PETRI_FLOW=56300, PETRI_PLACES=779, PETRI_TRANSITIONS=1870} [2024-06-27 16:51:04,995 INFO L281 CegarLoopForPetriNet]: 24 programPoint places, 755 predicate places. [2024-06-27 16:51:04,995 INFO L495 AbstractCegarLoop]: Abstraction has has 779 places, 1870 transitions, 56300 flow [2024-06-27 16:51:04,995 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 4.67741935483871) internal successors, (145), 31 states have internal predecessors, (145), 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) [2024-06-27 16:51:04,995 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 16:51:04,996 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 16:51:05,012 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2024-06-27 16:51:05,196 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2024-06-27 16:51:05,196 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-06-27 16:51:05,197 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 16:51:05,197 INFO L85 PathProgramCache]: Analyzing trace with hash -464406829, now seen corresponding path program 16 times [2024-06-27 16:51:05,197 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 16:51:05,197 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2113168435] [2024-06-27 16:51:05,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:51:05,198 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 16:51:05,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:51:05,335 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 16:51:05,335 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 16:51:05,335 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2113168435] [2024-06-27 16:51:05,336 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2113168435] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 16:51:05,336 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1635574958] [2024-06-27 16:51:05,336 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-06-27 16:51:05,336 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:51:05,336 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 16:51:05,337 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-06-27 16:51:05,339 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2024-06-27 16:51:05,390 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-06-27 16:51:05,390 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 16:51:05,391 INFO L262 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 17 conjunts are in the unsatisfiable core [2024-06-27 16:51:05,392 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 16:51:05,622 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 16:51:05,622 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 16:51:05,824 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 16:51:05,824 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1635574958] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 16:51:05,824 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 16:51:05,824 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 30 [2024-06-27 16:51:05,825 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [283162933] [2024-06-27 16:51:05,825 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 16:51:05,825 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2024-06-27 16:51:05,825 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 16:51:05,825 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2024-06-27 16:51:05,826 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=148, Invalid=782, Unknown=0, NotChecked=0, Total=930 [2024-06-27 16:51:05,837 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2024-06-27 16:51:05,837 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 779 places, 1870 transitions, 56300 flow. Second operand has 31 states, 31 states have (on average 4.645161290322581) internal successors, (144), 31 states have internal predecessors, (144), 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) [2024-06-27 16:51:05,837 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 16:51:05,838 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2024-06-27 16:51:05,838 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 16:51:11,996 INFO L124 PetriNetUnfolderBase]: 4857/8732 cut-off events. [2024-06-27 16:51:11,996 INFO L125 PetriNetUnfolderBase]: For 908727/908727 co-relation queries the response was YES. [2024-06-27 16:51:12,102 INFO L83 FinitePrefix]: Finished finitePrefix Result has 129200 conditions, 8732 events. 4857/8732 cut-off events. For 908727/908727 co-relation queries the response was YES. Maximal size of possible extension queue 520. Compared 63302 event pairs, 222 based on Foata normal form. 3/8735 useless extension candidates. Maximal degree in co-relation 128975. Up to 4820 conditions per place. [2024-06-27 16:51:12,149 INFO L140 encePairwiseOnDemand]: 10/22 looper letters, 849 selfloop transitions, 1361 changer transitions 13/2224 dead transitions. [2024-06-27 16:51:12,150 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 835 places, 2224 transitions, 70059 flow [2024-06-27 16:51:12,150 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2024-06-27 16:51:12,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2024-06-27 16:51:12,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 513 transitions. [2024-06-27 16:51:12,151 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.33794466403162055 [2024-06-27 16:51:12,151 INFO L175 Difference]: Start difference. First operand has 779 places, 1870 transitions, 56300 flow. Second operand 69 states and 513 transitions. [2024-06-27 16:51:12,151 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 835 places, 2224 transitions, 70059 flow [2024-06-27 16:51:21,651 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 781 places, 2224 transitions, 68691 flow, removed 361 selfloop flow, removed 54 redundant places. [2024-06-27 16:51:21,705 INFO L231 Difference]: Finished difference. Result has 795 places, 2072 transitions, 65530 flow [2024-06-27 16:51:21,707 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=55125, PETRI_DIFFERENCE_MINUEND_PLACES=713, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1870, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1161, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=665, PETRI_DIFFERENCE_SUBTRAHEND_STATES=69, PETRI_FLOW=65530, PETRI_PLACES=795, PETRI_TRANSITIONS=2072} [2024-06-27 16:51:21,707 INFO L281 CegarLoopForPetriNet]: 24 programPoint places, 771 predicate places. [2024-06-27 16:51:21,707 INFO L495 AbstractCegarLoop]: Abstraction has has 795 places, 2072 transitions, 65530 flow [2024-06-27 16:51:21,707 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 4.645161290322581) internal successors, (144), 31 states have internal predecessors, (144), 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) [2024-06-27 16:51:21,707 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 16:51:21,708 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 16:51:21,719 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2024-06-27 16:51:21,912 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:51:21,914 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-06-27 16:51:21,914 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 16:51:21,914 INFO L85 PathProgramCache]: Analyzing trace with hash 1857637399, now seen corresponding path program 17 times [2024-06-27 16:51:21,914 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 16:51:21,914 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1174348390] [2024-06-27 16:51:21,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:51:21,915 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 16:51:21,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:51:22,041 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 16:51:22,042 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 16:51:22,042 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1174348390] [2024-06-27 16:51:22,042 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1174348390] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 16:51:22,042 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1551647658] [2024-06-27 16:51:22,042 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-06-27 16:51:22,042 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:51:22,042 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 16:51:22,057 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-06-27 16:51:22,102 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2024-06-27 16:51:22,111 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2024-06-27 16:51:22,112 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 16:51:22,113 INFO L262 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 17 conjunts are in the unsatisfiable core [2024-06-27 16:51:22,113 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 16:51:22,322 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 16:51:22,322 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 16:51:22,510 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 16:51:22,510 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1551647658] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 16:51:22,510 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 16:51:22,510 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 30 [2024-06-27 16:51:22,510 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2032969473] [2024-06-27 16:51:22,511 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 16:51:22,511 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2024-06-27 16:51:22,511 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 16:51:22,511 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2024-06-27 16:51:22,511 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=147, Invalid=783, Unknown=0, NotChecked=0, Total=930 [2024-06-27 16:51:22,520 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2024-06-27 16:51:22,520 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 795 places, 2072 transitions, 65530 flow. Second operand has 31 states, 31 states have (on average 4.645161290322581) internal successors, (144), 31 states have internal predecessors, (144), 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) [2024-06-27 16:51:22,520 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 16:51:22,520 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2024-06-27 16:51:22,520 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 16:51:29,483 INFO L124 PetriNetUnfolderBase]: 4992/8977 cut-off events. [2024-06-27 16:51:29,484 INFO L125 PetriNetUnfolderBase]: For 916160/916160 co-relation queries the response was YES. [2024-06-27 16:51:29,609 INFO L83 FinitePrefix]: Finished finitePrefix Result has 135827 conditions, 8977 events. 4992/8977 cut-off events. For 916160/916160 co-relation queries the response was YES. Maximal size of possible extension queue 531. Compared 65469 event pairs, 219 based on Foata normal form. 3/8980 useless extension candidates. Maximal degree in co-relation 135632. Up to 4943 conditions per place. [2024-06-27 16:51:29,669 INFO L140 encePairwiseOnDemand]: 10/22 looper letters, 797 selfloop transitions, 1469 changer transitions 14/2281 dead transitions. [2024-06-27 16:51:29,669 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 866 places, 2281 transitions, 74783 flow [2024-06-27 16:51:29,669 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2024-06-27 16:51:29,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2024-06-27 16:51:29,670 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 553 transitions. [2024-06-27 16:51:29,671 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.33515151515151514 [2024-06-27 16:51:29,671 INFO L175 Difference]: Start difference. First operand has 795 places, 2072 transitions, 65530 flow. Second operand 75 states and 553 transitions. [2024-06-27 16:51:29,671 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 866 places, 2281 transitions, 74783 flow [2024-06-27 16:51:38,189 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 851 places, 2281 transitions, 74670 flow, removed 21 selfloop flow, removed 15 redundant places. [2024-06-27 16:51:38,246 INFO L231 Difference]: Finished difference. Result has 861 places, 2136 transitions, 72387 flow [2024-06-27 16:51:38,248 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=65421, PETRI_DIFFERENCE_MINUEND_PLACES=777, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2072, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1406, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=659, PETRI_DIFFERENCE_SUBTRAHEND_STATES=75, PETRI_FLOW=72387, PETRI_PLACES=861, PETRI_TRANSITIONS=2136} [2024-06-27 16:51:38,249 INFO L281 CegarLoopForPetriNet]: 24 programPoint places, 837 predicate places. [2024-06-27 16:51:38,249 INFO L495 AbstractCegarLoop]: Abstraction has has 861 places, 2136 transitions, 72387 flow [2024-06-27 16:51:38,249 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 4.645161290322581) internal successors, (144), 31 states have internal predecessors, (144), 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) [2024-06-27 16:51:38,249 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 16:51:38,249 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 16:51:38,260 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2024-06-27 16:51:38,459 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:51:38,460 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-06-27 16:51:38,460 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 16:51:38,460 INFO L85 PathProgramCache]: Analyzing trace with hash 1684389707, now seen corresponding path program 18 times [2024-06-27 16:51:38,460 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 16:51:38,461 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1912532777] [2024-06-27 16:51:38,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:51:38,461 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 16:51:38,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:51:38,588 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 16:51:38,588 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 16:51:38,589 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1912532777] [2024-06-27 16:51:38,589 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1912532777] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 16:51:38,589 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2102542661] [2024-06-27 16:51:38,589 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-06-27 16:51:38,589 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:51:38,589 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 16:51:38,590 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-06-27 16:51:38,591 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2024-06-27 16:51:38,642 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2024-06-27 16:51:38,642 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 16:51:38,643 INFO L262 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 17 conjunts are in the unsatisfiable core [2024-06-27 16:51:38,643 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 16:51:38,866 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 16:51:38,866 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 16:51:39,098 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 16:51:39,098 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2102542661] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 16:51:39,099 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 16:51:39,099 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 30 [2024-06-27 16:51:39,099 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1359305298] [2024-06-27 16:51:39,099 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 16:51:39,101 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2024-06-27 16:51:39,101 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 16:51:39,101 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2024-06-27 16:51:39,102 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=144, Invalid=786, Unknown=0, NotChecked=0, Total=930 [2024-06-27 16:51:39,106 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2024-06-27 16:51:39,106 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 861 places, 2136 transitions, 72387 flow. Second operand has 31 states, 31 states have (on average 4.645161290322581) internal successors, (144), 31 states have internal predecessors, (144), 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) [2024-06-27 16:51:39,106 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 16:51:39,106 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2024-06-27 16:51:39,106 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 16:51:47,744 INFO L124 PetriNetUnfolderBase]: 5012/9032 cut-off events. [2024-06-27 16:51:47,745 INFO L125 PetriNetUnfolderBase]: For 993654/993654 co-relation queries the response was YES. [2024-06-27 16:51:47,875 INFO L83 FinitePrefix]: Finished finitePrefix Result has 142792 conditions, 9032 events. 5012/9032 cut-off events. For 993654/993654 co-relation queries the response was YES. Maximal size of possible extension queue 533. Compared 66063 event pairs, 224 based on Foata normal form. 3/9035 useless extension candidates. Maximal degree in co-relation 142590. Up to 4830 conditions per place. [2024-06-27 16:51:47,927 INFO L140 encePairwiseOnDemand]: 10/22 looper letters, 826 selfloop transitions, 1469 changer transitions 12/2308 dead transitions. [2024-06-27 16:51:47,927 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 940 places, 2308 transitions, 79762 flow [2024-06-27 16:51:47,928 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2024-06-27 16:51:47,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2024-06-27 16:51:47,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 612 transitions. [2024-06-27 16:51:47,930 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.33515881708652795 [2024-06-27 16:51:47,930 INFO L175 Difference]: Start difference. First operand has 861 places, 2136 transitions, 72387 flow. Second operand 83 states and 612 transitions. [2024-06-27 16:51:47,930 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 940 places, 2308 transitions, 79762 flow [2024-06-27 16:51:59,063 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 912 places, 2308 transitions, 79274 flow, removed 100 selfloop flow, removed 28 redundant places. [2024-06-27 16:51:59,120 INFO L231 Difference]: Finished difference. Result has 918 places, 2149 transitions, 76554 flow [2024-06-27 16:51:59,122 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=71937, PETRI_DIFFERENCE_MINUEND_PLACES=830, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2136, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1457, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=678, PETRI_DIFFERENCE_SUBTRAHEND_STATES=83, PETRI_FLOW=76554, PETRI_PLACES=918, PETRI_TRANSITIONS=2149} [2024-06-27 16:51:59,122 INFO L281 CegarLoopForPetriNet]: 24 programPoint places, 894 predicate places. [2024-06-27 16:51:59,123 INFO L495 AbstractCegarLoop]: Abstraction has has 918 places, 2149 transitions, 76554 flow [2024-06-27 16:51:59,123 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 4.645161290322581) internal successors, (144), 31 states have internal predecessors, (144), 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) [2024-06-27 16:51:59,123 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 16:51:59,123 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 16:51:59,134 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2024-06-27 16:51:59,334 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:51:59,334 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-06-27 16:51:59,335 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 16:51:59,335 INFO L85 PathProgramCache]: Analyzing trace with hash -1736836909, now seen corresponding path program 19 times [2024-06-27 16:51:59,335 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 16:51:59,335 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1824077528] [2024-06-27 16:51:59,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:51:59,335 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 16:51:59,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:51:59,471 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 16:51:59,472 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 16:51:59,473 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1824077528] [2024-06-27 16:51:59,474 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1824077528] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 16:51:59,474 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1737118196] [2024-06-27 16:51:59,474 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-06-27 16:51:59,474 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:51:59,474 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 16:51:59,476 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-06-27 16:51:59,520 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2024-06-27 16:51:59,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:51:59,564 INFO L262 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 17 conjunts are in the unsatisfiable core [2024-06-27 16:51:59,565 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 16:51:59,769 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 16:51:59,769 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 16:51:59,941 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 16:51:59,942 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1737118196] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 16:51:59,942 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 16:51:59,942 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 30 [2024-06-27 16:51:59,942 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1565145523] [2024-06-27 16:51:59,943 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 16:51:59,943 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2024-06-27 16:51:59,944 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 16:51:59,944 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2024-06-27 16:51:59,944 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=796, Unknown=0, NotChecked=0, Total=930 [2024-06-27 16:51:59,947 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2024-06-27 16:51:59,947 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 918 places, 2149 transitions, 76554 flow. Second operand has 31 states, 31 states have (on average 4.645161290322581) internal successors, (144), 31 states have internal predecessors, (144), 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) [2024-06-27 16:51:59,947 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 16:51:59,947 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2024-06-27 16:51:59,947 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 16:52:11,099 INFO L124 PetriNetUnfolderBase]: 7292/13041 cut-off events. [2024-06-27 16:52:11,100 INFO L125 PetriNetUnfolderBase]: For 1490025/1490025 co-relation queries the response was YES. [2024-06-27 16:52:11,277 INFO L83 FinitePrefix]: Finished finitePrefix Result has 215026 conditions, 13041 events. 7292/13041 cut-off events. For 1490025/1490025 co-relation queries the response was YES. Maximal size of possible extension queue 885. Compared 102044 event pairs, 226 based on Foata normal form. 10/13051 useless extension candidates. Maximal degree in co-relation 214825. Up to 4411 conditions per place. [2024-06-27 16:52:11,357 INFO L140 encePairwiseOnDemand]: 10/22 looper letters, 980 selfloop transitions, 2466 changer transitions 31/3478 dead transitions. [2024-06-27 16:52:11,357 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1045 places, 3478 transitions, 127925 flow [2024-06-27 16:52:11,358 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 131 states. [2024-06-27 16:52:11,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 131 states. [2024-06-27 16:52:11,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 975 transitions. [2024-06-27 16:52:11,359 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3383067314365024 [2024-06-27 16:52:11,359 INFO L175 Difference]: Start difference. First operand has 918 places, 2149 transitions, 76554 flow. Second operand 131 states and 975 transitions. [2024-06-27 16:52:11,360 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1045 places, 3478 transitions, 127925 flow [2024-06-27 16:52:28,588 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 994 places, 3478 transitions, 125939 flow, removed 43 selfloop flow, removed 51 redundant places. [2024-06-27 16:52:28,687 INFO L231 Difference]: Finished difference. Result has 1048 places, 3191 transitions, 123860 flow [2024-06-27 16:52:28,690 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=75181, PETRI_DIFFERENCE_MINUEND_PLACES=864, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2149, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1475, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=412, PETRI_DIFFERENCE_SUBTRAHEND_STATES=131, PETRI_FLOW=123860, PETRI_PLACES=1048, PETRI_TRANSITIONS=3191} [2024-06-27 16:52:28,690 INFO L281 CegarLoopForPetriNet]: 24 programPoint places, 1024 predicate places. [2024-06-27 16:52:28,690 INFO L495 AbstractCegarLoop]: Abstraction has has 1048 places, 3191 transitions, 123860 flow [2024-06-27 16:52:28,690 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 4.645161290322581) internal successors, (144), 31 states have internal predecessors, (144), 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) [2024-06-27 16:52:28,691 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 16:52:28,691 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 16:52:28,702 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2024-06-27 16:52:28,901 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2024-06-27 16:52:28,902 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-06-27 16:52:28,902 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 16:52:28,902 INFO L85 PathProgramCache]: Analyzing trace with hash 1974989458, now seen corresponding path program 2 times [2024-06-27 16:52:28,902 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 16:52:28,903 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1332425239] [2024-06-27 16:52:28,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:52:28,903 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 16:52:28,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:52:29,026 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 16:52:29,026 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 16:52:29,026 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1332425239] [2024-06-27 16:52:29,026 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1332425239] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 16:52:29,027 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [478890120] [2024-06-27 16:52:29,027 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-06-27 16:52:29,027 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:52:29,027 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 16:52:29,028 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-06-27 16:52:29,056 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2024-06-27 16:52:29,089 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-06-27 16:52:29,089 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 16:52:29,090 INFO L262 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 17 conjunts are in the unsatisfiable core [2024-06-27 16:52:29,091 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 16:52:29,221 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 16:52:29,221 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 16:52:29,365 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 16:52:29,366 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [478890120] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 16:52:29,366 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 16:52:29,366 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 29 [2024-06-27 16:52:29,366 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1155283983] [2024-06-27 16:52:29,366 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 16:52:29,366 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2024-06-27 16:52:29,366 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 16:52:29,367 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2024-06-27 16:52:29,367 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=734, Unknown=0, NotChecked=0, Total=870 [2024-06-27 16:52:29,369 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2024-06-27 16:52:29,370 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1048 places, 3191 transitions, 123860 flow. Second operand has 30 states, 30 states have (on average 4.333333333333333) internal successors, (130), 30 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 16:52:29,370 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 16:52:29,370 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2024-06-27 16:52:29,370 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 16:52:45,157 INFO L124 PetriNetUnfolderBase]: 7541/13596 cut-off events. [2024-06-27 16:52:45,157 INFO L125 PetriNetUnfolderBase]: For 2016136/2016136 co-relation queries the response was YES. [2024-06-27 16:52:45,384 INFO L83 FinitePrefix]: Finished finitePrefix Result has 243957 conditions, 13596 events. 7541/13596 cut-off events. For 2016136/2016136 co-relation queries the response was YES. Maximal size of possible extension queue 970. Compared 107942 event pairs, 277 based on Foata normal form. 4/13600 useless extension candidates. Maximal degree in co-relation 243709. Up to 7221 conditions per place. [2024-06-27 16:52:45,484 INFO L140 encePairwiseOnDemand]: 9/22 looper letters, 1126 selfloop transitions, 2364 changer transitions 25/3516 dead transitions. [2024-06-27 16:52:45,485 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1098 places, 3516 transitions, 143624 flow [2024-06-27 16:52:45,485 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2024-06-27 16:52:45,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2024-06-27 16:52:45,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 436 transitions. [2024-06-27 16:52:45,486 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3603305785123967 [2024-06-27 16:52:45,486 INFO L175 Difference]: Start difference. First operand has 1048 places, 3191 transitions, 123860 flow. Second operand 55 states and 436 transitions. [2024-06-27 16:52:45,486 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1098 places, 3516 transitions, 143624 flow [2024-06-27 16:53:12,653 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1072 places, 3516 transitions, 141878 flow, removed 687 selfloop flow, removed 26 redundant places. [2024-06-27 16:53:12,759 INFO L231 Difference]: Finished difference. Result has 1083 places, 3395 transitions, 138995 flow [2024-06-27 16:53:12,762 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=122177, PETRI_DIFFERENCE_MINUEND_PLACES=1018, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=3191, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2155, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1030, PETRI_DIFFERENCE_SUBTRAHEND_STATES=55, PETRI_FLOW=138995, PETRI_PLACES=1083, PETRI_TRANSITIONS=3395} [2024-06-27 16:53:12,762 INFO L281 CegarLoopForPetriNet]: 24 programPoint places, 1059 predicate places. [2024-06-27 16:53:12,762 INFO L495 AbstractCegarLoop]: Abstraction has has 1083 places, 3395 transitions, 138995 flow [2024-06-27 16:53:12,763 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 4.333333333333333) internal successors, (130), 30 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 16:53:12,763 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 16:53:12,763 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 16:53:12,774 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2024-06-27 16:53:12,965 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2024-06-27 16:53:12,965 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-06-27 16:53:12,965 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 16:53:12,965 INFO L85 PathProgramCache]: Analyzing trace with hash 1789268932, now seen corresponding path program 3 times [2024-06-27 16:53:12,965 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 16:53:12,965 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [736207703] [2024-06-27 16:53:12,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:53:12,965 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 16:53:12,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:53:13,107 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 16:53:13,107 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 16:53:13,107 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [736207703] [2024-06-27 16:53:13,107 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [736207703] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 16:53:13,107 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1236757175] [2024-06-27 16:53:13,107 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-06-27 16:53:13,107 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:53:13,108 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 16:53:13,109 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-06-27 16:53:13,109 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2024-06-27 16:53:13,161 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-06-27 16:53:13,161 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 16:53:13,162 INFO L262 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 17 conjunts are in the unsatisfiable core [2024-06-27 16:53:13,162 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 16:53:13,316 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 16:53:13,316 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 16:53:13,442 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 16:53:13,442 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1236757175] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 16:53:13,442 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 16:53:13,443 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 29 [2024-06-27 16:53:13,443 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [992528571] [2024-06-27 16:53:13,443 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 16:53:13,443 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2024-06-27 16:53:13,443 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 16:53:13,444 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2024-06-27 16:53:13,444 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=141, Invalid=729, Unknown=0, NotChecked=0, Total=870 [2024-06-27 16:53:13,451 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2024-06-27 16:53:13,452 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1083 places, 3395 transitions, 138995 flow. Second operand has 30 states, 30 states have (on average 4.366666666666666) internal successors, (131), 30 states have internal predecessors, (131), 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) [2024-06-27 16:53:13,452 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 16:53:13,452 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2024-06-27 16:53:13,452 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 16:53:31,631 INFO L124 PetriNetUnfolderBase]: 8285/14964 cut-off events. [2024-06-27 16:53:31,631 INFO L125 PetriNetUnfolderBase]: For 2428434/2428434 co-relation queries the response was YES. [2024-06-27 16:53:31,898 INFO L83 FinitePrefix]: Finished finitePrefix Result has 274708 conditions, 14964 events. 8285/14964 cut-off events. For 2428434/2428434 co-relation queries the response was YES. Maximal size of possible extension queue 1025. Compared 121007 event pairs, 263 based on Foata normal form. 84/15048 useless extension candidates. Maximal degree in co-relation 274157. Up to 5804 conditions per place. [2024-06-27 16:53:31,991 INFO L140 encePairwiseOnDemand]: 9/22 looper letters, 984 selfloop transitions, 2916 changer transitions 38/3939 dead transitions. [2024-06-27 16:53:31,991 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1149 places, 3939 transitions, 162711 flow [2024-06-27 16:53:31,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2024-06-27 16:53:31,991 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2024-06-27 16:53:31,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 566 transitions. [2024-06-27 16:53:31,992 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35242839352428396 [2024-06-27 16:53:31,992 INFO L175 Difference]: Start difference. First operand has 1083 places, 3395 transitions, 138995 flow. Second operand 73 states and 566 transitions. [2024-06-27 16:53:31,992 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1149 places, 3939 transitions, 162711 flow [2024-06-27 16:54:11,749 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1125 places, 3939 transitions, 158647 flow, removed 292 selfloop flow, removed 24 redundant places. [2024-06-27 16:54:11,878 INFO L231 Difference]: Finished difference. Result has 1144 places, 3736 transitions, 157403 flow [2024-06-27 16:54:11,880 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=135417, PETRI_DIFFERENCE_MINUEND_PLACES=1053, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=3395, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2590, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=673, PETRI_DIFFERENCE_SUBTRAHEND_STATES=73, PETRI_FLOW=157403, PETRI_PLACES=1144, PETRI_TRANSITIONS=3736} [2024-06-27 16:54:11,881 INFO L281 CegarLoopForPetriNet]: 24 programPoint places, 1120 predicate places. [2024-06-27 16:54:11,881 INFO L495 AbstractCegarLoop]: Abstraction has has 1144 places, 3736 transitions, 157403 flow [2024-06-27 16:54:11,881 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 4.366666666666666) internal successors, (131), 30 states have internal predecessors, (131), 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) [2024-06-27 16:54:11,881 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 16:54:11,881 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 16:54:11,892 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2024-06-27 16:54:12,092 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2024-06-27 16:54:12,093 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-06-27 16:54:12,093 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 16:54:12,093 INFO L85 PathProgramCache]: Analyzing trace with hash 2092356106, now seen corresponding path program 4 times [2024-06-27 16:54:12,093 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 16:54:12,094 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1395902315] [2024-06-27 16:54:12,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:54:12,094 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 16:54:12,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:54:12,258 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 16:54:12,259 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 16:54:12,259 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1395902315] [2024-06-27 16:54:12,259 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1395902315] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 16:54:12,259 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1091476566] [2024-06-27 16:54:12,259 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-06-27 16:54:12,259 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:54:12,259 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 16:54:12,277 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-06-27 16:54:12,278 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2024-06-27 16:54:12,331 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-06-27 16:54:12,331 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 16:54:12,332 INFO L262 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 17 conjunts are in the unsatisfiable core [2024-06-27 16:54:12,334 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 16:54:12,502 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 16:54:12,502 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 16:54:12,656 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 16:54:12,656 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1091476566] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 16:54:12,656 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 16:54:12,656 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 29 [2024-06-27 16:54:12,656 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2103307071] [2024-06-27 16:54:12,656 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 16:54:12,657 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2024-06-27 16:54:12,657 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 16:54:12,657 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2024-06-27 16:54:12,657 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=149, Invalid=721, Unknown=0, NotChecked=0, Total=870 [2024-06-27 16:54:12,665 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2024-06-27 16:54:12,665 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1144 places, 3736 transitions, 157403 flow. Second operand has 30 states, 30 states have (on average 4.333333333333333) internal successors, (130), 30 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 16:54:12,665 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 16:54:12,665 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2024-06-27 16:54:12,665 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 16:54:36,483 INFO L124 PetriNetUnfolderBase]: 8626/15644 cut-off events. [2024-06-27 16:54:36,484 INFO L125 PetriNetUnfolderBase]: For 2617686/2617686 co-relation queries the response was YES. [2024-06-27 16:54:36,778 INFO L83 FinitePrefix]: Finished finitePrefix Result has 291766 conditions, 15644 events. 8626/15644 cut-off events. For 2617686/2617686 co-relation queries the response was YES. Maximal size of possible extension queue 1066. Compared 128080 event pairs, 282 based on Foata normal form. 78/15722 useless extension candidates. Maximal degree in co-relation 291146. Up to 5247 conditions per place. [2024-06-27 16:54:37,009 INFO L140 encePairwiseOnDemand]: 9/22 looper letters, 949 selfloop transitions, 3307 changer transitions 28/4285 dead transitions. [2024-06-27 16:54:37,010 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1238 places, 4285 transitions, 181714 flow [2024-06-27 16:54:37,010 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 99 states. [2024-06-27 16:54:37,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2024-06-27 16:54:37,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 729 transitions. [2024-06-27 16:54:37,012 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3347107438016529 [2024-06-27 16:54:37,012 INFO L175 Difference]: Start difference. First operand has 1144 places, 3736 transitions, 157403 flow. Second operand 99 states and 729 transitions. [2024-06-27 16:54:37,012 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1238 places, 4285 transitions, 181714 flow [2024-06-27 16:55:26,859 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1207 places, 4285 transitions, 179680 flow, removed 508 selfloop flow, removed 31 redundant places. [2024-06-27 16:55:26,992 INFO L231 Difference]: Finished difference. Result has 1222 places, 4081 transitions, 178867 flow [2024-06-27 16:55:26,995 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=155240, PETRI_DIFFERENCE_MINUEND_PLACES=1109, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=3726, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2988, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=715, PETRI_DIFFERENCE_SUBTRAHEND_STATES=99, PETRI_FLOW=178867, PETRI_PLACES=1222, PETRI_TRANSITIONS=4081} [2024-06-27 16:55:26,996 INFO L281 CegarLoopForPetriNet]: 24 programPoint places, 1198 predicate places. [2024-06-27 16:55:26,996 INFO L495 AbstractCegarLoop]: Abstraction has has 1222 places, 4081 transitions, 178867 flow [2024-06-27 16:55:26,996 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 4.333333333333333) internal successors, (130), 30 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 16:55:26,996 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 16:55:26,996 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 16:55:27,008 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2024-06-27 16:55:27,198 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:55:27,198 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-06-27 16:55:27,199 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 16:55:27,199 INFO L85 PathProgramCache]: Analyzing trace with hash -157021353, now seen corresponding path program 20 times [2024-06-27 16:55:27,199 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 16:55:27,199 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1696613067] [2024-06-27 16:55:27,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:55:27,199 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 16:55:27,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:55:27,370 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 16:55:27,371 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 16:55:27,371 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1696613067] [2024-06-27 16:55:27,371 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1696613067] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 16:55:27,371 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1909208527] [2024-06-27 16:55:27,371 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-06-27 16:55:27,371 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:55:27,372 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 16:55:27,372 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-06-27 16:55:27,373 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2024-06-27 16:55:27,439 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-06-27 16:55:27,439 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 16:55:27,440 INFO L262 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 17 conjunts are in the unsatisfiable core [2024-06-27 16:55:27,440 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 16:55:27,648 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 16:55:27,648 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 16:55:27,849 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 16:55:27,849 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1909208527] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 16:55:27,850 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 16:55:27,850 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 30 [2024-06-27 16:55:27,850 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [334517089] [2024-06-27 16:55:27,850 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 16:55:27,850 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2024-06-27 16:55:27,850 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 16:55:27,850 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2024-06-27 16:55:27,851 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=798, Unknown=0, NotChecked=0, Total=930 [2024-06-27 16:55:27,860 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2024-06-27 16:55:27,860 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1222 places, 4081 transitions, 178867 flow. Second operand has 31 states, 31 states have (on average 4.645161290322581) internal successors, (144), 31 states have internal predecessors, (144), 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) [2024-06-27 16:55:27,860 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 16:55:27,860 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2024-06-27 16:55:27,860 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 16:56:04,664 INFO L124 PetriNetUnfolderBase]: 11672/21052 cut-off events. [2024-06-27 16:56:04,664 INFO L125 PetriNetUnfolderBase]: For 3372430/3372430 co-relation queries the response was YES. [2024-06-27 16:56:05,268 INFO L83 FinitePrefix]: Finished finitePrefix Result has 403408 conditions, 21052 events. 11672/21052 cut-off events. For 3372430/3372430 co-relation queries the response was YES. Maximal size of possible extension queue 1320. Compared 178452 event pairs, 177 based on Foata normal form. 5/21057 useless extension candidates. Maximal degree in co-relation 402794. Up to 5937 conditions per place. [2024-06-27 16:56:05,413 INFO L140 encePairwiseOnDemand]: 9/22 looper letters, 1405 selfloop transitions, 4375 changer transitions 17/5798 dead transitions. [2024-06-27 16:56:05,413 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1355 places, 5798 transitions, 259154 flow [2024-06-27 16:56:05,414 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 138 states. [2024-06-27 16:56:05,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 138 states. [2024-06-27 16:56:05,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 1131 transitions. [2024-06-27 16:56:05,415 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3725296442687747 [2024-06-27 16:56:05,416 INFO L175 Difference]: Start difference. First operand has 1222 places, 4081 transitions, 178867 flow. Second operand 138 states and 1131 transitions. [2024-06-27 16:56:05,416 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1355 places, 5798 transitions, 259154 flow [2024-06-27 16:57:49,178 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1293 places, 5798 transitions, 249848 flow, removed 3661 selfloop flow, removed 62 redundant places. [2024-06-27 16:57:49,346 INFO L231 Difference]: Finished difference. Result has 1342 places, 5400 transitions, 246773 flow [2024-06-27 16:57:49,349 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=175458, PETRI_DIFFERENCE_MINUEND_PLACES=1156, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=4081, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3102, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=669, PETRI_DIFFERENCE_SUBTRAHEND_STATES=138, PETRI_FLOW=246773, PETRI_PLACES=1342, PETRI_TRANSITIONS=5400} [2024-06-27 16:57:49,350 INFO L281 CegarLoopForPetriNet]: 24 programPoint places, 1318 predicate places. [2024-06-27 16:57:49,350 INFO L495 AbstractCegarLoop]: Abstraction has has 1342 places, 5400 transitions, 246773 flow [2024-06-27 16:57:49,350 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 4.645161290322581) internal successors, (144), 31 states have internal predecessors, (144), 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) [2024-06-27 16:57:49,350 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 16:57:49,350 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 16:57:49,362 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2024-06-27 16:57:49,562 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:57:49,562 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-06-27 16:57:49,562 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 16:57:49,562 INFO L85 PathProgramCache]: Analyzing trace with hash -1888653782, now seen corresponding path program 5 times [2024-06-27 16:57:49,563 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 16:57:49,563 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [517135448] [2024-06-27 16:57:49,563 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:57:49,563 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 16:57:49,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:57:49,696 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 16:57:49,697 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 16:57:49,697 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [517135448] [2024-06-27 16:57:49,697 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [517135448] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 16:57:49,697 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [685126482] [2024-06-27 16:57:49,697 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-06-27 16:57:49,697 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:57:49,697 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 16:57:49,698 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-06-27 16:57:49,700 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2024-06-27 16:57:49,753 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-06-27 16:57:49,753 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 16:57:49,754 INFO L262 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 17 conjunts are in the unsatisfiable core [2024-06-27 16:57:49,754 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 16:57:49,908 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 16:57:49,908 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 16:57:50,052 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 16:57:50,053 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [685126482] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 16:57:50,053 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 16:57:50,053 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 29 [2024-06-27 16:57:50,053 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [553659723] [2024-06-27 16:57:50,053 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 16:57:50,053 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2024-06-27 16:57:50,053 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 16:57:50,054 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2024-06-27 16:57:50,054 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=139, Invalid=731, Unknown=0, NotChecked=0, Total=870 [2024-06-27 16:57:50,059 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2024-06-27 16:57:50,059 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1342 places, 5400 transitions, 246773 flow. Second operand has 30 states, 30 states have (on average 4.333333333333333) internal successors, (130), 30 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 16:57:50,059 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 16:57:50,059 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2024-06-27 16:57:50,059 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 16:58:31,910 INFO L124 PetriNetUnfolderBase]: 11660/20993 cut-off events. [2024-06-27 16:58:31,910 INFO L125 PetriNetUnfolderBase]: For 1710658/1710658 co-relation queries the response was YES. [2024-06-27 16:58:32,975 INFO L83 FinitePrefix]: Finished finitePrefix Result has 367271 conditions, 20993 events. 11660/20993 cut-off events. For 1710658/1710658 co-relation queries the response was YES. Maximal size of possible extension queue 1319. Compared 177377 event pairs, 321 based on Foata normal form. 6/20999 useless extension candidates. Maximal degree in co-relation 366968. Up to 12355 conditions per place. [2024-06-27 16:58:33,295 INFO L140 encePairwiseOnDemand]: 9/22 looper letters, 2032 selfloop transitions, 3441 changer transitions 29/5503 dead transitions. [2024-06-27 16:58:33,301 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1393 places, 5503 transitions, 258399 flow [2024-06-27 16:58:33,301 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2024-06-27 16:58:33,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2024-06-27 16:58:33,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 434 transitions. [2024-06-27 16:58:33,303 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3586776859504132 [2024-06-27 16:58:33,303 INFO L175 Difference]: Start difference. First operand has 1342 places, 5400 transitions, 246773 flow. Second operand 55 states and 434 transitions. [2024-06-27 16:58:33,303 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1393 places, 5503 transitions, 258399 flow