./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/weaver/popl20-nonblocking-cntr-alt.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 803cd42f Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/weaver/popl20-nonblocking-cntr-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 0ead2366baa94ec77674f75cd829f45857f5651e204e91d33a749a2af2868461 --- Real Ultimate output --- This is Ultimate 0.2.5-tmp.dk.eval-assert-order-craig-803cd42-m [2024-11-22 13:52:35,692 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-22 13:52:35,761 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-11-22 13:52:35,766 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-22 13:52:35,769 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-22 13:52:35,792 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-22 13:52:35,792 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-22 13:52:35,792 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-22 13:52:35,793 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-22 13:52:35,794 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-22 13:52:35,794 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-22 13:52:35,794 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-22 13:52:35,795 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-22 13:52:35,796 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-22 13:52:35,796 INFO L153 SettingsManager]: * Use SBE=true [2024-11-22 13:52:35,797 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-22 13:52:35,797 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-11-22 13:52:35,797 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-22 13:52:35,797 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-22 13:52:35,797 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-22 13:52:35,798 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-22 13:52:35,798 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-11-22 13:52:35,801 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-22 13:52:35,801 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-11-22 13:52:35,801 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-22 13:52:35,801 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-22 13:52:35,801 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-11-22 13:52:35,802 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-22 13:52:35,802 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-22 13:52:35,802 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-22 13:52:35,802 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-22 13:52:35,802 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-22 13:52:35,802 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-22 13:52:35,803 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-22 13:52:35,803 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-22 13:52:35,803 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-11-22 13:52:35,803 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-22 13:52:35,803 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-22 13:52:35,803 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-22 13:52:35,803 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-22 13:52:35,804 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-22 13:52:35,805 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-22 13:52:35,805 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 0ead2366baa94ec77674f75cd829f45857f5651e204e91d33a749a2af2868461 [2024-11-22 13:52:36,011 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-22 13:52:36,030 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-22 13:52:36,034 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-22 13:52:36,035 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-22 13:52:36,035 INFO L274 PluginConnector]: CDTParser initialized [2024-11-22 13:52:36,036 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/weaver/popl20-nonblocking-cntr-alt.wvr.c [2024-11-22 13:52:37,270 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-22 13:52:37,426 INFO L384 CDTParser]: Found 1 translation units. [2024-11-22 13:52:37,426 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/popl20-nonblocking-cntr-alt.wvr.c [2024-11-22 13:52:37,433 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/425add35f/f597f6e3d3af4a51bd71b82de292104f/FLAG2cd2d15d8 [2024-11-22 13:52:37,839 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/425add35f/f597f6e3d3af4a51bd71b82de292104f [2024-11-22 13:52:37,841 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-22 13:52:37,842 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-22 13:52:37,847 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-22 13:52:37,848 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-22 13:52:37,851 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-22 13:52:37,852 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.11 01:52:37" (1/1) ... [2024-11-22 13:52:37,853 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@a371b15 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:52:37, skipping insertion in model container [2024-11-22 13:52:37,854 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.11 01:52:37" (1/1) ... [2024-11-22 13:52:37,868 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-22 13:52:38,034 WARN L250 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/popl20-nonblocking-cntr-alt.wvr.c[2124,2137] [2024-11-22 13:52:38,038 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-22 13:52:38,045 INFO L200 MainTranslator]: Completed pre-run [2024-11-22 13:52:38,060 WARN L250 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/popl20-nonblocking-cntr-alt.wvr.c[2124,2137] [2024-11-22 13:52:38,061 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-22 13:52:38,075 INFO L204 MainTranslator]: Completed translation [2024-11-22 13:52:38,076 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:52:38 WrapperNode [2024-11-22 13:52:38,076 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-22 13:52:38,077 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-22 13:52:38,077 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-22 13:52:38,077 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-22 13:52:38,082 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:52:38" (1/1) ... [2024-11-22 13:52:38,087 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:52:38" (1/1) ... [2024-11-22 13:52:38,104 INFO L138 Inliner]: procedures = 20, calls = 14, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 46 [2024-11-22 13:52:38,105 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-22 13:52:38,105 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-22 13:52:38,105 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-22 13:52:38,105 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-22 13:52:38,116 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:52:38" (1/1) ... [2024-11-22 13:52:38,116 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:52:38" (1/1) ... [2024-11-22 13:52:38,117 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:52:38" (1/1) ... [2024-11-22 13:52:38,126 INFO L175 MemorySlicer]: Split 2 memory accesses to 1 slices as follows [2]. 100 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2]. The 0 writes are split as follows [0]. [2024-11-22 13:52:38,126 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:52:38" (1/1) ... [2024-11-22 13:52:38,126 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:52:38" (1/1) ... [2024-11-22 13:52:38,129 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:52:38" (1/1) ... [2024-11-22 13:52:38,131 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:52:38" (1/1) ... [2024-11-22 13:52:38,132 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:52:38" (1/1) ... [2024-11-22 13:52:38,132 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:52:38" (1/1) ... [2024-11-22 13:52:38,133 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-22 13:52:38,134 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-22 13:52:38,134 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-22 13:52:38,134 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-22 13:52:38,135 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:52:38" (1/1) ... [2024-11-22 13:52:38,141 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-22 13:52:38,149 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-22 13:52:38,164 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-11-22 13:52:38,167 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-11-22 13:52:38,204 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-22 13:52:38,204 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2024-11-22 13:52:38,205 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2024-11-22 13:52:38,205 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2024-11-22 13:52:38,205 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2024-11-22 13:52:38,205 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-11-22 13:52:38,206 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-11-22 13:52:38,206 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-11-22 13:52:38,207 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-22 13:52:38,207 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-22 13:52:38,209 WARN L207 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2024-11-22 13:52:38,272 INFO L238 CfgBuilder]: Building ICFG [2024-11-22 13:52:38,273 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-22 13:52:38,377 INFO L283 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2024-11-22 13:52:38,378 INFO L287 CfgBuilder]: Performing block encoding [2024-11-22 13:52:38,482 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-22 13:52:38,482 INFO L316 CfgBuilder]: Removed 2 assume(true) statements. [2024-11-22 13:52:38,483 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 01:52:38 BoogieIcfgContainer [2024-11-22 13:52:38,483 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-22 13:52:38,484 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-22 13:52:38,484 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-22 13:52:38,487 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-22 13:52:38,487 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.11 01:52:37" (1/3) ... [2024-11-22 13:52:38,488 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4f52f21b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.11 01:52:38, skipping insertion in model container [2024-11-22 13:52:38,488 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:52:38" (2/3) ... [2024-11-22 13:52:38,489 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4f52f21b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.11 01:52:38, skipping insertion in model container [2024-11-22 13:52:38,489 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 01:52:38" (3/3) ... [2024-11-22 13:52:38,490 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-nonblocking-cntr-alt.wvr.c [2024-11-22 13:52:38,503 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-22 13:52:38,504 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-11-22 13:52:38,504 INFO L489 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-11-22 13:52:38,545 INFO L143 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2024-11-22 13:52:38,570 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 26 places, 21 transitions, 56 flow [2024-11-22 13:52:38,588 INFO L124 PetriNetUnfolderBase]: 2/19 cut-off events. [2024-11-22 13:52:38,588 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-11-22 13:52:38,590 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28 conditions, 19 events. 2/19 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 18 event pairs, 0 based on Foata normal form. 0/16 useless extension candidates. Maximal degree in co-relation 14. Up to 2 conditions per place. [2024-11-22 13:52:38,591 INFO L82 GeneralOperation]: Start removeDead. Operand has 26 places, 21 transitions, 56 flow [2024-11-22 13:52:38,593 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 23 places, 18 transitions, 48 flow [2024-11-22 13:52:38,600 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-22 13:52:38,605 INFO L333 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopHeads, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@3b63b220, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-22 13:52:38,605 INFO L334 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2024-11-22 13:52:38,611 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-11-22 13:52:38,611 INFO L124 PetriNetUnfolderBase]: 2/17 cut-off events. [2024-11-22 13:52:38,612 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-11-22 13:52:38,612 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-22 13:52:38,612 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-22 13:52:38,613 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-22 13:52:38,618 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 13:52:38,619 INFO L85 PathProgramCache]: Analyzing trace with hash 1126928125, now seen corresponding path program 1 times [2024-11-22 13:52:38,630 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 13:52:38,630 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [734337809] [2024-11-22 13:52:38,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 13:52:38,631 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 13:52:38,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 13:52:38,841 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-22 13:52:38,843 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 13:52:38,844 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [734337809] [2024-11-22 13:52:38,844 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [734337809] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-22 13:52:38,844 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-22 13:52:38,845 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-22 13:52:38,846 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1979601635] [2024-11-22 13:52:38,846 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-22 13:52:38,852 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-22 13:52:38,856 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 13:52:38,873 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-22 13:52:38,873 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-11-22 13:52:38,881 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 21 [2024-11-22 13:52:38,883 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 23 places, 18 transitions, 48 flow. Second operand has 4 states, 4 states have (on average 8.0) internal successors, (32), 4 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-22 13:52:38,883 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-22 13:52:38,883 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 21 [2024-11-22 13:52:38,884 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-22 13:52:38,949 INFO L124 PetriNetUnfolderBase]: 61/128 cut-off events. [2024-11-22 13:52:38,949 INFO L125 PetriNetUnfolderBase]: For 14/14 co-relation queries the response was YES. [2024-11-22 13:52:38,950 INFO L83 FinitePrefix]: Finished finitePrefix Result has 255 conditions, 128 events. 61/128 cut-off events. For 14/14 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 381 event pairs, 31 based on Foata normal form. 9/136 useless extension candidates. Maximal degree in co-relation 218. Up to 86 conditions per place. [2024-11-22 13:52:38,952 INFO L140 encePairwiseOnDemand]: 17/21 looper letters, 19 selfloop transitions, 3 changer transitions 0/25 dead transitions. [2024-11-22 13:52:38,952 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 26 places, 25 transitions, 109 flow [2024-11-22 13:52:38,953 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-22 13:52:38,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-22 13:52:38,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 43 transitions. [2024-11-22 13:52:38,960 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5119047619047619 [2024-11-22 13:52:38,961 INFO L175 Difference]: Start difference. First operand has 23 places, 18 transitions, 48 flow. Second operand 4 states and 43 transitions. [2024-11-22 13:52:38,962 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 26 places, 25 transitions, 109 flow [2024-11-22 13:52:38,963 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 22 places, 25 transitions, 99 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-11-22 13:52:38,965 INFO L231 Difference]: Finished difference. Result has 23 places, 19 transitions, 54 flow [2024-11-22 13:52:38,966 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=40, PETRI_DIFFERENCE_MINUEND_PLACES=19, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=18, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=15, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=54, PETRI_PLACES=23, PETRI_TRANSITIONS=19} [2024-11-22 13:52:38,969 INFO L277 CegarLoopForPetriNet]: 23 programPoint places, 0 predicate places. [2024-11-22 13:52:38,969 INFO L471 AbstractCegarLoop]: Abstraction has has 23 places, 19 transitions, 54 flow [2024-11-22 13:52:38,969 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 8.0) internal successors, (32), 4 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-22 13:52:38,969 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-22 13:52:38,969 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-22 13:52:38,969 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-22 13:52:38,970 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-22 13:52:38,970 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 13:52:38,970 INFO L85 PathProgramCache]: Analyzing trace with hash -1437000289, now seen corresponding path program 1 times [2024-11-22 13:52:38,970 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 13:52:38,970 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [854086044] [2024-11-22 13:52:38,971 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 13:52:38,971 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 13:52:38,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 13:52:39,055 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-22 13:52:39,056 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 13:52:39,056 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [854086044] [2024-11-22 13:52:39,056 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [854086044] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-22 13:52:39,056 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-22 13:52:39,056 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-22 13:52:39,057 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [471305071] [2024-11-22 13:52:39,057 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-22 13:52:39,058 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-22 13:52:39,058 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 13:52:39,058 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-22 13:52:39,058 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-11-22 13:52:39,061 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 21 [2024-11-22 13:52:39,062 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 23 places, 19 transitions, 54 flow. Second operand has 4 states, 4 states have (on average 8.25) internal successors, (33), 4 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-22 13:52:39,062 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-22 13:52:39,062 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 21 [2024-11-22 13:52:39,062 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-22 13:52:39,123 INFO L124 PetriNetUnfolderBase]: 89/179 cut-off events. [2024-11-22 13:52:39,123 INFO L125 PetriNetUnfolderBase]: For 67/67 co-relation queries the response was YES. [2024-11-22 13:52:39,124 INFO L83 FinitePrefix]: Finished finitePrefix Result has 412 conditions, 179 events. 89/179 cut-off events. For 67/67 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 598 event pairs, 37 based on Foata normal form. 10/188 useless extension candidates. Maximal degree in co-relation 104. Up to 108 conditions per place. [2024-11-22 13:52:39,125 INFO L140 encePairwiseOnDemand]: 17/21 looper letters, 22 selfloop transitions, 3 changer transitions 0/28 dead transitions. [2024-11-22 13:52:39,125 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 26 places, 28 transitions, 133 flow [2024-11-22 13:52:39,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-22 13:52:39,126 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-22 13:52:39,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 44 transitions. [2024-11-22 13:52:39,126 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5238095238095238 [2024-11-22 13:52:39,126 INFO L175 Difference]: Start difference. First operand has 23 places, 19 transitions, 54 flow. Second operand 4 states and 44 transitions. [2024-11-22 13:52:39,126 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 26 places, 28 transitions, 133 flow [2024-11-22 13:52:39,127 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 24 places, 28 transitions, 127 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-22 13:52:39,128 INFO L231 Difference]: Finished difference. Result has 25 places, 20 transitions, 64 flow [2024-11-22 13:52:39,128 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=50, PETRI_DIFFERENCE_MINUEND_PLACES=21, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=19, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=16, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=64, PETRI_PLACES=25, PETRI_TRANSITIONS=20} [2024-11-22 13:52:39,129 INFO L277 CegarLoopForPetriNet]: 23 programPoint places, 2 predicate places. [2024-11-22 13:52:39,129 INFO L471 AbstractCegarLoop]: Abstraction has has 25 places, 20 transitions, 64 flow [2024-11-22 13:52:39,129 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 8.25) internal successors, (33), 4 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-22 13:52:39,129 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-22 13:52:39,129 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-22 13:52:39,130 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-22 13:52:39,130 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-22 13:52:39,130 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 13:52:39,130 INFO L85 PathProgramCache]: Analyzing trace with hash 1087690981, now seen corresponding path program 1 times [2024-11-22 13:52:39,130 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 13:52:39,131 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1855599874] [2024-11-22 13:52:39,131 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 13:52:39,131 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 13:52:39,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 13:52:39,562 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-22 13:52:39,562 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 13:52:39,562 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1855599874] [2024-11-22 13:52:39,563 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1855599874] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-22 13:52:39,563 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1233562305] [2024-11-22 13:52:39,563 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 13:52:39,563 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 13:52:39,563 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-22 13:52:39,566 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-22 13:52:39,577 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-22 13:52:39,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 13:52:39,628 INFO L255 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 12 conjuncts are in the unsatisfiable core [2024-11-22 13:52:39,633 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-22 13:52:39,924 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-22 13:52:39,925 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-22 13:52:40,385 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-22 13:52:40,386 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1233562305] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-22 13:52:40,386 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-22 13:52:40,386 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 23 [2024-11-22 13:52:40,386 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1119546578] [2024-11-22 13:52:40,386 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-22 13:52:40,387 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2024-11-22 13:52:40,388 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 13:52:40,388 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2024-11-22 13:52:40,390 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=144, Invalid=408, Unknown=0, NotChecked=0, Total=552 [2024-11-22 13:52:40,414 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 21 [2024-11-22 13:52:40,415 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 25 places, 20 transitions, 64 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) [2024-11-22 13:52:40,415 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-22 13:52:40,415 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 21 [2024-11-22 13:52:40,415 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-22 13:52:41,188 INFO L124 PetriNetUnfolderBase]: 387/665 cut-off events. [2024-11-22 13:52:41,188 INFO L125 PetriNetUnfolderBase]: For 193/193 co-relation queries the response was YES. [2024-11-22 13:52:41,191 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1649 conditions, 665 events. 387/665 cut-off events. For 193/193 co-relation queries the response was YES. Maximal size of possible extension queue 41. Compared 2625 event pairs, 23 based on Foata normal form. 14/679 useless extension candidates. Maximal degree in co-relation 595. Up to 218 conditions per place. [2024-11-22 13:52:41,195 INFO L140 encePairwiseOnDemand]: 9/21 looper letters, 74 selfloop transitions, 53 changer transitions 15/143 dead transitions. [2024-11-22 13:52:41,195 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 143 transitions, 708 flow [2024-11-22 13:52:41,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2024-11-22 13:52:41,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2024-11-22 13:52:41,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 215 transitions. [2024-11-22 13:52:41,199 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.39377289377289376 [2024-11-22 13:52:41,199 INFO L175 Difference]: Start difference. First operand has 25 places, 20 transitions, 64 flow. Second operand 26 states and 215 transitions. [2024-11-22 13:52:41,199 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 143 transitions, 708 flow [2024-11-22 13:52:41,203 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 48 places, 143 transitions, 696 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-22 13:52:41,205 INFO L231 Difference]: Finished difference. Result has 65 places, 76 transitions, 504 flow [2024-11-22 13:52:41,205 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=60, PETRI_DIFFERENCE_MINUEND_PLACES=23, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=20, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=7, PETRI_DIFFERENCE_SUBTRAHEND_STATES=26, PETRI_FLOW=504, PETRI_PLACES=65, PETRI_TRANSITIONS=76} [2024-11-22 13:52:41,205 INFO L277 CegarLoopForPetriNet]: 23 programPoint places, 42 predicate places. [2024-11-22 13:52:41,205 INFO L471 AbstractCegarLoop]: Abstraction has has 65 places, 76 transitions, 504 flow [2024-11-22 13:52:41,206 INFO L472 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) [2024-11-22 13:52:41,206 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-22 13:52:41,206 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-22 13:52:41,214 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-11-22 13:52:41,406 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 13:52:41,407 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-22 13:52:41,407 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 13:52:41,407 INFO L85 PathProgramCache]: Analyzing trace with hash -1244966769, now seen corresponding path program 2 times [2024-11-22 13:52:41,407 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 13:52:41,407 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1074727616] [2024-11-22 13:52:41,408 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-22 13:52:41,408 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 13:52:41,419 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-22 13:52:41,420 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-22 13:52:41,586 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-22 13:52:41,586 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 13:52:41,586 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1074727616] [2024-11-22 13:52:41,587 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1074727616] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-22 13:52:41,587 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1045544170] [2024-11-22 13:52:41,587 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-22 13:52:41,587 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 13:52:41,587 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-22 13:52:41,589 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-22 13:52:41,590 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-22 13:52:41,627 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-22 13:52:41,628 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-22 13:52:41,628 INFO L255 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 12 conjuncts are in the unsatisfiable core [2024-11-22 13:52:41,629 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-22 13:52:41,778 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-22 13:52:41,778 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-22 13:52:42,092 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-22 13:52:42,093 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1045544170] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-22 13:52:42,093 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-22 13:52:42,093 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 22 [2024-11-22 13:52:42,093 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [337404663] [2024-11-22 13:52:42,093 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-22 13:52:42,094 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2024-11-22 13:52:42,094 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 13:52:42,094 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2024-11-22 13:52:42,095 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=393, Unknown=0, NotChecked=0, Total=506 [2024-11-22 13:52:42,100 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 21 [2024-11-22 13:52:42,100 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 76 transitions, 504 flow. Second operand has 23 states, 23 states have (on average 4.826086956521739) internal successors, (111), 23 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-22 13:52:42,100 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-22 13:52:42,100 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 21 [2024-11-22 13:52:42,101 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-22 13:52:42,797 INFO L124 PetriNetUnfolderBase]: 575/1019 cut-off events. [2024-11-22 13:52:42,797 INFO L125 PetriNetUnfolderBase]: For 2651/2651 co-relation queries the response was YES. [2024-11-22 13:52:42,803 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4259 conditions, 1019 events. 575/1019 cut-off events. For 2651/2651 co-relation queries the response was YES. Maximal size of possible extension queue 71. Compared 4742 event pairs, 35 based on Foata normal form. 2/1021 useless extension candidates. Maximal degree in co-relation 4213. Up to 292 conditions per place. [2024-11-22 13:52:42,808 INFO L140 encePairwiseOnDemand]: 10/21 looper letters, 102 selfloop transitions, 112 changer transitions 28/243 dead transitions. [2024-11-22 13:52:42,808 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 87 places, 243 transitions, 1980 flow [2024-11-22 13:52:42,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2024-11-22 13:52:42,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2024-11-22 13:52:42,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 233 transitions. [2024-11-22 13:52:42,811 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4438095238095238 [2024-11-22 13:52:42,811 INFO L175 Difference]: Start difference. First operand has 65 places, 76 transitions, 504 flow. Second operand 25 states and 233 transitions. [2024-11-22 13:52:42,811 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 87 places, 243 transitions, 1980 flow [2024-11-22 13:52:42,832 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 86 places, 243 transitions, 1958 flow, removed 11 selfloop flow, removed 1 redundant places. [2024-11-22 13:52:42,837 INFO L231 Difference]: Finished difference. Result has 104 places, 148 transitions, 1473 flow [2024-11-22 13:52:42,837 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=490, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=76, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=25, PETRI_FLOW=1473, PETRI_PLACES=104, PETRI_TRANSITIONS=148} [2024-11-22 13:52:42,837 INFO L277 CegarLoopForPetriNet]: 23 programPoint places, 81 predicate places. [2024-11-22 13:52:42,838 INFO L471 AbstractCegarLoop]: Abstraction has has 104 places, 148 transitions, 1473 flow [2024-11-22 13:52:42,838 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 4.826086956521739) internal successors, (111), 23 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-22 13:52:42,839 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-22 13:52:42,839 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-22 13:52:42,845 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-11-22 13:52:43,039 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2024-11-22 13:52:43,040 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-22 13:52:43,040 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 13:52:43,040 INFO L85 PathProgramCache]: Analyzing trace with hash 253928195, now seen corresponding path program 3 times [2024-11-22 13:52:43,040 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 13:52:43,041 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [795205201] [2024-11-22 13:52:43,041 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-22 13:52:43,041 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 13:52:43,050 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-11-22 13:52:43,050 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-22 13:52:43,184 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-22 13:52:43,184 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 13:52:43,184 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [795205201] [2024-11-22 13:52:43,184 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [795205201] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-22 13:52:43,185 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1746395108] [2024-11-22 13:52:43,185 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-22 13:52:43,185 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 13:52:43,185 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-22 13:52:43,187 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-22 13:52:43,188 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-22 13:52:43,219 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-11-22 13:52:43,220 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-22 13:52:43,220 INFO L255 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 12 conjuncts are in the unsatisfiable core [2024-11-22 13:52:43,221 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-22 13:52:43,387 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-22 13:52:43,388 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-22 13:52:43,729 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-22 13:52:43,730 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1746395108] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-22 13:52:43,730 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-22 13:52:43,730 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 23 [2024-11-22 13:52:43,730 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1731132298] [2024-11-22 13:52:43,730 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-22 13:52:43,731 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2024-11-22 13:52:43,731 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 13:52:43,731 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2024-11-22 13:52:43,732 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=437, Unknown=0, NotChecked=0, Total=552 [2024-11-22 13:52:43,739 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 21 [2024-11-22 13:52:43,740 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 104 places, 148 transitions, 1473 flow. Second operand has 24 states, 24 states have (on average 4.833333333333333) internal successors, (116), 24 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-22 13:52:43,740 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-22 13:52:43,740 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 21 [2024-11-22 13:52:43,740 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-22 13:52:44,527 INFO L124 PetriNetUnfolderBase]: 605/1078 cut-off events. [2024-11-22 13:52:44,527 INFO L125 PetriNetUnfolderBase]: For 5941/5941 co-relation queries the response was YES. [2024-11-22 13:52:44,531 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5920 conditions, 1078 events. 605/1078 cut-off events. For 5941/5941 co-relation queries the response was YES. Maximal size of possible extension queue 80. Compared 5141 event pairs, 27 based on Foata normal form. 2/1080 useless extension candidates. Maximal degree in co-relation 5846. Up to 306 conditions per place. [2024-11-22 13:52:44,535 INFO L140 encePairwiseOnDemand]: 9/21 looper letters, 105 selfloop transitions, 141 changer transitions 21/268 dead transitions. [2024-11-22 13:52:44,536 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 127 places, 268 transitions, 2927 flow [2024-11-22 13:52:44,536 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2024-11-22 13:52:44,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2024-11-22 13:52:44,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 254 transitions. [2024-11-22 13:52:44,537 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.43197278911564624 [2024-11-22 13:52:44,537 INFO L175 Difference]: Start difference. First operand has 104 places, 148 transitions, 1473 flow. Second operand 28 states and 254 transitions. [2024-11-22 13:52:44,537 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 127 places, 268 transitions, 2927 flow [2024-11-22 13:52:44,558 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 122 places, 268 transitions, 2810 flow, removed 46 selfloop flow, removed 5 redundant places. [2024-11-22 13:52:44,561 INFO L231 Difference]: Finished difference. Result has 136 places, 180 transitions, 2232 flow [2024-11-22 13:52:44,561 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=1399, PETRI_DIFFERENCE_MINUEND_PLACES=95, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=148, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=109, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=28, PETRI_FLOW=2232, PETRI_PLACES=136, PETRI_TRANSITIONS=180} [2024-11-22 13:52:44,562 INFO L277 CegarLoopForPetriNet]: 23 programPoint places, 113 predicate places. [2024-11-22 13:52:44,562 INFO L471 AbstractCegarLoop]: Abstraction has has 136 places, 180 transitions, 2232 flow [2024-11-22 13:52:44,562 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 4.833333333333333) internal successors, (116), 24 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-22 13:52:44,562 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-22 13:52:44,562 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-22 13:52:44,569 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-11-22 13:52:44,762 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 13:52:44,763 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-22 13:52:44,763 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 13:52:44,763 INFO L85 PathProgramCache]: Analyzing trace with hash 1106845699, now seen corresponding path program 4 times [2024-11-22 13:52:44,763 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 13:52:44,763 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1684981239] [2024-11-22 13:52:44,764 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-22 13:52:44,764 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 13:52:44,771 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-22 13:52:44,771 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-22 13:52:44,913 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-22 13:52:44,913 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 13:52:44,913 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1684981239] [2024-11-22 13:52:44,914 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1684981239] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-22 13:52:44,914 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [842690393] [2024-11-22 13:52:44,914 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-22 13:52:44,914 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 13:52:44,914 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-22 13:52:44,916 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-22 13:52:44,917 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-22 13:52:44,948 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-22 13:52:44,948 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-22 13:52:44,949 INFO L255 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-11-22 13:52:44,950 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-22 13:52:45,111 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-22 13:52:45,111 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-22 13:52:45,430 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-22 13:52:45,430 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [842690393] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-22 13:52:45,431 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-22 13:52:45,431 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9, 10] total 27 [2024-11-22 13:52:45,431 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2048749429] [2024-11-22 13:52:45,431 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-22 13:52:45,431 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2024-11-22 13:52:45,431 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 13:52:45,432 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2024-11-22 13:52:45,432 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=616, Unknown=0, NotChecked=0, Total=756 [2024-11-22 13:52:45,442 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 21 [2024-11-22 13:52:45,442 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 136 places, 180 transitions, 2232 flow. Second operand has 28 states, 28 states have (on average 4.714285714285714) internal successors, (132), 28 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-22 13:52:45,442 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-22 13:52:45,442 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 21 [2024-11-22 13:52:45,442 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-22 13:52:47,652 INFO L124 PetriNetUnfolderBase]: 1033/1838 cut-off events. [2024-11-22 13:52:47,652 INFO L125 PetriNetUnfolderBase]: For 15460/15460 co-relation queries the response was YES. [2024-11-22 13:52:47,657 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11706 conditions, 1838 events. 1033/1838 cut-off events. For 15460/15460 co-relation queries the response was YES. Maximal size of possible extension queue 113. Compared 9689 event pairs, 8 based on Foata normal form. 20/1858 useless extension candidates. Maximal degree in co-relation 11614. Up to 538 conditions per place. [2024-11-22 13:52:47,665 INFO L140 encePairwiseOnDemand]: 9/21 looper letters, 224 selfloop transitions, 319 changer transitions 32/576 dead transitions. [2024-11-22 13:52:47,665 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 209 places, 576 transitions, 7441 flow [2024-11-22 13:52:47,666 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2024-11-22 13:52:47,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2024-11-22 13:52:47,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 634 transitions. [2024-11-22 13:52:47,668 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.39208410636982066 [2024-11-22 13:52:47,668 INFO L175 Difference]: Start difference. First operand has 136 places, 180 transitions, 2232 flow. Second operand 77 states and 634 transitions. [2024-11-22 13:52:47,668 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 209 places, 576 transitions, 7441 flow [2024-11-22 13:52:47,718 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 195 places, 576 transitions, 6956 flow, removed 117 selfloop flow, removed 14 redundant places. [2024-11-22 13:52:47,725 INFO L231 Difference]: Finished difference. Result has 210 places, 400 transitions, 5672 flow [2024-11-22 13:52:47,725 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=1973, PETRI_DIFFERENCE_MINUEND_PLACES=119, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=180, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=146, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=77, PETRI_FLOW=5672, PETRI_PLACES=210, PETRI_TRANSITIONS=400} [2024-11-22 13:52:47,725 INFO L277 CegarLoopForPetriNet]: 23 programPoint places, 187 predicate places. [2024-11-22 13:52:47,726 INFO L471 AbstractCegarLoop]: Abstraction has has 210 places, 400 transitions, 5672 flow [2024-11-22 13:52:47,726 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 4.714285714285714) internal successors, (132), 28 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-22 13:52:47,726 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-22 13:52:47,726 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-22 13:52:47,732 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-11-22 13:52:47,926 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 13:52:47,927 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-22 13:52:47,927 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 13:52:47,927 INFO L85 PathProgramCache]: Analyzing trace with hash -1094682093, now seen corresponding path program 5 times [2024-11-22 13:52:47,927 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 13:52:47,927 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [486147567] [2024-11-22 13:52:47,927 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-22 13:52:47,928 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 13:52:47,933 INFO L227 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-22 13:52:47,934 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-22 13:52:48,078 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-22 13:52:48,079 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 13:52:48,079 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [486147567] [2024-11-22 13:52:48,079 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [486147567] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-22 13:52:48,079 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2071802619] [2024-11-22 13:52:48,079 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-22 13:52:48,079 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 13:52:48,079 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-22 13:52:48,081 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-22 13:52:48,082 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-22 13:52:48,109 INFO L227 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-22 13:52:48,109 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-22 13:52:48,110 INFO L255 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-11-22 13:52:48,111 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-22 13:52:48,266 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-22 13:52:48,266 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-22 13:52:48,537 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-22 13:52:48,538 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2071802619] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-22 13:52:48,538 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-22 13:52:48,538 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 10] total 26 [2024-11-22 13:52:48,538 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1022686130] [2024-11-22 13:52:48,538 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-22 13:52:48,538 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2024-11-22 13:52:48,539 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 13:52:48,539 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2024-11-22 13:52:48,539 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=151, Invalid=551, Unknown=0, NotChecked=0, Total=702 [2024-11-22 13:52:48,556 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 21 [2024-11-22 13:52:48,556 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 210 places, 400 transitions, 5672 flow. Second operand has 27 states, 27 states have (on average 4.814814814814815) internal successors, (130), 27 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) [2024-11-22 13:52:48,556 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-22 13:52:48,556 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 21 [2024-11-22 13:52:48,556 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-22 13:52:49,509 INFO L124 PetriNetUnfolderBase]: 1079/1914 cut-off events. [2024-11-22 13:52:49,509 INFO L125 PetriNetUnfolderBase]: For 15275/15275 co-relation queries the response was YES. [2024-11-22 13:52:49,516 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13123 conditions, 1914 events. 1079/1914 cut-off events. For 15275/15275 co-relation queries the response was YES. Maximal size of possible extension queue 117. Compared 10237 event pairs, 25 based on Foata normal form. 2/1916 useless extension candidates. Maximal degree in co-relation 12995. Up to 803 conditions per place. [2024-11-22 13:52:49,525 INFO L140 encePairwiseOnDemand]: 9/21 looper letters, 230 selfloop transitions, 283 changer transitions 11/525 dead transitions. [2024-11-22 13:52:49,525 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 238 places, 525 transitions, 7938 flow [2024-11-22 13:52:49,526 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2024-11-22 13:52:49,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2024-11-22 13:52:49,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 284 transitions. [2024-11-22 13:52:49,527 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4098124098124098 [2024-11-22 13:52:49,527 INFO L175 Difference]: Start difference. First operand has 210 places, 400 transitions, 5672 flow. Second operand 33 states and 284 transitions. [2024-11-22 13:52:49,527 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 238 places, 525 transitions, 7938 flow [2024-11-22 13:52:49,624 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 216 places, 525 transitions, 6434 flow, removed 618 selfloop flow, removed 22 redundant places. [2024-11-22 13:52:49,631 INFO L231 Difference]: Finished difference. Result has 229 places, 440 transitions, 6001 flow [2024-11-22 13:52:49,631 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=4482, PETRI_DIFFERENCE_MINUEND_PLACES=184, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=400, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=242, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=140, PETRI_DIFFERENCE_SUBTRAHEND_STATES=33, PETRI_FLOW=6001, PETRI_PLACES=229, PETRI_TRANSITIONS=440} [2024-11-22 13:52:49,632 INFO L277 CegarLoopForPetriNet]: 23 programPoint places, 206 predicate places. [2024-11-22 13:52:49,632 INFO L471 AbstractCegarLoop]: Abstraction has has 229 places, 440 transitions, 6001 flow [2024-11-22 13:52:49,632 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 4.814814814814815) internal successors, (130), 27 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) [2024-11-22 13:52:49,632 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-22 13:52:49,633 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-22 13:52:49,639 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-11-22 13:52:49,833 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 13:52:49,833 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-22 13:52:49,833 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 13:52:49,834 INFO L85 PathProgramCache]: Analyzing trace with hash 691254019, now seen corresponding path program 6 times [2024-11-22 13:52:49,834 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 13:52:49,834 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [586495167] [2024-11-22 13:52:49,834 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-22 13:52:49,834 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 13:52:49,849 INFO L227 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2024-11-22 13:52:49,850 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-22 13:52:49,998 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-22 13:52:49,998 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 13:52:49,998 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [586495167] [2024-11-22 13:52:49,998 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [586495167] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-22 13:52:49,999 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [327677851] [2024-11-22 13:52:49,999 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-22 13:52:49,999 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 13:52:49,999 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-22 13:52:50,001 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-22 13:52:50,002 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-11-22 13:52:50,033 INFO L227 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2024-11-22 13:52:50,033 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-22 13:52:50,034 INFO L255 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 12 conjuncts are in the unsatisfiable core [2024-11-22 13:52:50,035 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-22 13:52:50,183 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-22 13:52:50,183 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-22 13:52:50,443 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-22 13:52:50,443 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [327677851] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-22 13:52:50,443 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-22 13:52:50,444 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 23 [2024-11-22 13:52:50,444 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [631861454] [2024-11-22 13:52:50,444 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-22 13:52:50,444 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2024-11-22 13:52:50,444 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 13:52:50,445 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2024-11-22 13:52:50,445 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=438, Unknown=0, NotChecked=0, Total=552 [2024-11-22 13:52:50,449 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 21 [2024-11-22 13:52:50,449 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 229 places, 440 transitions, 6001 flow. Second operand has 24 states, 24 states have (on average 4.833333333333333) internal successors, (116), 24 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-22 13:52:50,449 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-22 13:52:50,449 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 21 [2024-11-22 13:52:50,449 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-22 13:52:51,046 INFO L124 PetriNetUnfolderBase]: 1208/2148 cut-off events. [2024-11-22 13:52:51,046 INFO L125 PetriNetUnfolderBase]: For 12317/12317 co-relation queries the response was YES. [2024-11-22 13:52:51,053 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13807 conditions, 2148 events. 1208/2148 cut-off events. For 12317/12317 co-relation queries the response was YES. Maximal size of possible extension queue 139. Compared 11888 event pairs, 18 based on Foata normal form. 10/2158 useless extension candidates. Maximal degree in co-relation 13666. Up to 1016 conditions per place. [2024-11-22 13:52:51,063 INFO L140 encePairwiseOnDemand]: 9/21 looper letters, 242 selfloop transitions, 303 changer transitions 22/568 dead transitions. [2024-11-22 13:52:51,063 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 241 places, 568 transitions, 8411 flow [2024-11-22 13:52:51,063 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2024-11-22 13:52:51,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2024-11-22 13:52:51,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 202 transitions. [2024-11-22 13:52:51,065 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.41821946169772256 [2024-11-22 13:52:51,065 INFO L175 Difference]: Start difference. First operand has 229 places, 440 transitions, 6001 flow. Second operand 23 states and 202 transitions. [2024-11-22 13:52:51,065 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 241 places, 568 transitions, 8411 flow [2024-11-22 13:52:51,146 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 227 places, 568 transitions, 8193 flow, removed 31 selfloop flow, removed 14 redundant places. [2024-11-22 13:52:51,153 INFO L231 Difference]: Finished difference. Result has 237 places, 495 transitions, 7896 flow [2024-11-22 13:52:51,154 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=5695, PETRI_DIFFERENCE_MINUEND_PLACES=205, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=430, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=236, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=158, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=7896, PETRI_PLACES=237, PETRI_TRANSITIONS=495} [2024-11-22 13:52:51,154 INFO L277 CegarLoopForPetriNet]: 23 programPoint places, 214 predicate places. [2024-11-22 13:52:51,154 INFO L471 AbstractCegarLoop]: Abstraction has has 237 places, 495 transitions, 7896 flow [2024-11-22 13:52:51,154 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 4.833333333333333) internal successors, (116), 24 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-22 13:52:51,155 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-22 13:52:51,155 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-22 13:52:51,161 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-11-22 13:52:51,355 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 13:52:51,355 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-22 13:52:51,356 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 13:52:51,356 INFO L85 PathProgramCache]: Analyzing trace with hash 1544171523, now seen corresponding path program 7 times [2024-11-22 13:52:51,356 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 13:52:51,356 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2018278472] [2024-11-22 13:52:51,356 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-22 13:52:51,356 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 13:52:51,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 13:52:51,498 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-22 13:52:51,498 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 13:52:51,499 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2018278472] [2024-11-22 13:52:51,499 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2018278472] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-22 13:52:51,499 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [931231196] [2024-11-22 13:52:51,499 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-22 13:52:51,499 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 13:52:51,499 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-22 13:52:51,501 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-22 13:52:51,502 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-11-22 13:52:51,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 13:52:51,532 INFO L255 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 12 conjuncts are in the unsatisfiable core [2024-11-22 13:52:51,533 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-22 13:52:51,668 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-22 13:52:51,668 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-22 13:52:51,936 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-22 13:52:51,936 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [931231196] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-22 13:52:51,936 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-22 13:52:51,936 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 23 [2024-11-22 13:52:51,936 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1126937385] [2024-11-22 13:52:51,936 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-22 13:52:51,937 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2024-11-22 13:52:51,937 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 13:52:51,937 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2024-11-22 13:52:51,937 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=418, Unknown=0, NotChecked=0, Total=552 [2024-11-22 13:52:51,945 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 21 [2024-11-22 13:52:51,946 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 237 places, 495 transitions, 7896 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) [2024-11-22 13:52:51,946 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-22 13:52:51,946 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 21 [2024-11-22 13:52:51,946 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-22 13:52:52,767 INFO L124 PetriNetUnfolderBase]: 1322/2334 cut-off events. [2024-11-22 13:52:52,767 INFO L125 PetriNetUnfolderBase]: For 18661/18661 co-relation queries the response was YES. [2024-11-22 13:52:52,777 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16767 conditions, 2334 events. 1322/2334 cut-off events. For 18661/18661 co-relation queries the response was YES. Maximal size of possible extension queue 145. Compared 12961 event pairs, 18 based on Foata normal form. 2/2336 useless extension candidates. Maximal degree in co-relation 16616. Up to 1085 conditions per place. [2024-11-22 13:52:52,793 INFO L140 encePairwiseOnDemand]: 9/21 looper letters, 261 selfloop transitions, 370 changer transitions 7/639 dead transitions. [2024-11-22 13:52:52,793 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 259 places, 639 transitions, 10801 flow [2024-11-22 13:52:52,793 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2024-11-22 13:52:52,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2024-11-22 13:52:52,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 213 transitions. [2024-11-22 13:52:52,794 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.3901098901098901 [2024-11-22 13:52:52,794 INFO L175 Difference]: Start difference. First operand has 237 places, 495 transitions, 7896 flow. Second operand 26 states and 213 transitions. [2024-11-22 13:52:52,794 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 259 places, 639 transitions, 10801 flow [2024-11-22 13:52:52,972 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 251 places, 639 transitions, 10620 flow, removed 43 selfloop flow, removed 8 redundant places. [2024-11-22 13:52:52,981 INFO L231 Difference]: Finished difference. Result has 261 places, 581 transitions, 10484 flow [2024-11-22 13:52:52,981 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=7767, PETRI_DIFFERENCE_MINUEND_PLACES=226, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=495, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=284, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=158, PETRI_DIFFERENCE_SUBTRAHEND_STATES=26, PETRI_FLOW=10484, PETRI_PLACES=261, PETRI_TRANSITIONS=581} [2024-11-22 13:52:52,982 INFO L277 CegarLoopForPetriNet]: 23 programPoint places, 238 predicate places. [2024-11-22 13:52:52,982 INFO L471 AbstractCegarLoop]: Abstraction has has 261 places, 581 transitions, 10484 flow [2024-11-22 13:52:52,982 INFO L472 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) [2024-11-22 13:52:52,982 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-22 13:52:52,982 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-22 13:52:52,988 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2024-11-22 13:52:53,182 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 13:52:53,183 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-22 13:52:53,183 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 13:52:53,183 INFO L85 PathProgramCache]: Analyzing trace with hash 1247042307, now seen corresponding path program 8 times [2024-11-22 13:52:53,183 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 13:52:53,183 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2029349626] [2024-11-22 13:52:53,183 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-22 13:52:53,183 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 13:52:53,188 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-22 13:52:53,188 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-22 13:52:53,341 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-22 13:52:53,341 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 13:52:53,341 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2029349626] [2024-11-22 13:52:53,342 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2029349626] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-22 13:52:53,342 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1766270176] [2024-11-22 13:52:53,342 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-22 13:52:53,342 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 13:52:53,342 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-22 13:52:53,344 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-22 13:52:53,345 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-11-22 13:52:53,375 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-22 13:52:53,375 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-22 13:52:53,375 INFO L255 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 12 conjuncts are in the unsatisfiable core [2024-11-22 13:52:53,376 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-22 13:52:53,491 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-22 13:52:53,491 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-22 13:52:53,744 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-22 13:52:53,745 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1766270176] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-22 13:52:53,745 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-22 13:52:53,745 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 22 [2024-11-22 13:52:53,745 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [635172559] [2024-11-22 13:52:53,745 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-22 13:52:53,745 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2024-11-22 13:52:53,745 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 13:52:53,746 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2024-11-22 13:52:53,746 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=387, Unknown=0, NotChecked=0, Total=506 [2024-11-22 13:52:53,756 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 21 [2024-11-22 13:52:53,756 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 261 places, 581 transitions, 10484 flow. Second operand has 23 states, 23 states have (on average 4.869565217391305) internal successors, (112), 23 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-22 13:52:53,757 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-22 13:52:53,757 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 21 [2024-11-22 13:52:53,757 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-22 13:52:54,566 INFO L124 PetriNetUnfolderBase]: 1339/2352 cut-off events. [2024-11-22 13:52:54,566 INFO L125 PetriNetUnfolderBase]: For 24925/24925 co-relation queries the response was YES. [2024-11-22 13:52:54,574 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18965 conditions, 2352 events. 1339/2352 cut-off events. For 24925/24925 co-relation queries the response was YES. Maximal size of possible extension queue 143. Compared 12975 event pairs, 21 based on Foata normal form. 7/2359 useless extension candidates. Maximal degree in co-relation 18834. Up to 1088 conditions per place. [2024-11-22 13:52:54,582 INFO L140 encePairwiseOnDemand]: 9/21 looper letters, 277 selfloop transitions, 345 changer transitions 24/647 dead transitions. [2024-11-22 13:52:54,583 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 278 places, 647 transitions, 12397 flow [2024-11-22 13:52:54,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2024-11-22 13:52:54,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2024-11-22 13:52:54,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 190 transitions. [2024-11-22 13:52:54,584 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4308390022675737 [2024-11-22 13:52:54,584 INFO L175 Difference]: Start difference. First operand has 261 places, 581 transitions, 10484 flow. Second operand 21 states and 190 transitions. [2024-11-22 13:52:54,584 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 278 places, 647 transitions, 12397 flow [2024-11-22 13:52:54,763 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 268 places, 647 transitions, 12245 flow, removed 43 selfloop flow, removed 10 redundant places. [2024-11-22 13:52:54,772 INFO L231 Difference]: Finished difference. Result has 276 places, 587 transitions, 11873 flow [2024-11-22 13:52:54,773 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=10313, PETRI_DIFFERENCE_MINUEND_PLACES=248, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=579, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=326, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=244, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=11873, PETRI_PLACES=276, PETRI_TRANSITIONS=587} [2024-11-22 13:52:54,773 INFO L277 CegarLoopForPetriNet]: 23 programPoint places, 253 predicate places. [2024-11-22 13:52:54,773 INFO L471 AbstractCegarLoop]: Abstraction has has 276 places, 587 transitions, 11873 flow [2024-11-22 13:52:54,773 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 4.869565217391305) internal successors, (112), 23 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-22 13:52:54,773 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-22 13:52:54,773 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-22 13:52:54,779 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2024-11-22 13:52:54,974 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2024-11-22 13:52:54,974 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-22 13:52:54,974 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 13:52:54,974 INFO L85 PathProgramCache]: Analyzing trace with hash 2099959811, now seen corresponding path program 9 times [2024-11-22 13:52:54,975 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 13:52:54,975 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1792621634] [2024-11-22 13:52:54,975 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-22 13:52:54,975 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 13:52:54,980 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-11-22 13:52:54,980 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-22 13:52:55,130 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-22 13:52:55,130 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 13:52:55,130 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1792621634] [2024-11-22 13:52:55,130 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1792621634] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-22 13:52:55,130 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [626765750] [2024-11-22 13:52:55,131 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-22 13:52:55,131 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 13:52:55,131 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-22 13:52:55,133 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-22 13:52:55,134 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-11-22 13:52:55,167 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-11-22 13:52:55,167 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-22 13:52:55,167 INFO L255 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 12 conjuncts are in the unsatisfiable core [2024-11-22 13:52:55,168 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-22 13:52:55,296 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-22 13:52:55,296 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-22 13:52:55,611 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-22 13:52:55,612 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [626765750] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-22 13:52:55,612 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-22 13:52:55,612 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 23 [2024-11-22 13:52:55,612 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1640705653] [2024-11-22 13:52:55,612 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-22 13:52:55,612 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2024-11-22 13:52:55,613 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 13:52:55,613 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2024-11-22 13:52:55,613 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=137, Invalid=415, Unknown=0, NotChecked=0, Total=552 [2024-11-22 13:52:55,621 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 21 [2024-11-22 13:52:55,621 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 276 places, 587 transitions, 11873 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) [2024-11-22 13:52:55,622 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-22 13:52:55,622 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 21 [2024-11-22 13:52:55,622 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-22 13:52:56,686 INFO L124 PetriNetUnfolderBase]: 1389/2443 cut-off events. [2024-11-22 13:52:56,686 INFO L125 PetriNetUnfolderBase]: For 33757/33757 co-relation queries the response was YES. [2024-11-22 13:52:56,698 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21549 conditions, 2443 events. 1389/2443 cut-off events. For 33757/33757 co-relation queries the response was YES. Maximal size of possible extension queue 149. Compared 13587 event pairs, 19 based on Foata normal form. 2/2445 useless extension candidates. Maximal degree in co-relation 21422. Up to 1099 conditions per place. [2024-11-22 13:52:56,708 INFO L140 encePairwiseOnDemand]: 9/21 looper letters, 250 selfloop transitions, 456 changer transitions 10/717 dead transitions. [2024-11-22 13:52:56,708 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 304 places, 717 transitions, 14982 flow [2024-11-22 13:52:56,709 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2024-11-22 13:52:56,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2024-11-22 13:52:56,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 281 transitions. [2024-11-22 13:52:56,710 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.38231292517006804 [2024-11-22 13:52:56,710 INFO L175 Difference]: Start difference. First operand has 276 places, 587 transitions, 11873 flow. Second operand 35 states and 281 transitions. [2024-11-22 13:52:56,710 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 304 places, 717 transitions, 14982 flow [2024-11-22 13:52:56,953 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 289 places, 717 transitions, 14794 flow, removed 19 selfloop flow, removed 15 redundant places. [2024-11-22 13:52:56,964 INFO L231 Difference]: Finished difference. Result has 300 places, 654 transitions, 14368 flow [2024-11-22 13:52:56,965 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=11716, PETRI_DIFFERENCE_MINUEND_PLACES=255, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=587, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=390, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=171, PETRI_DIFFERENCE_SUBTRAHEND_STATES=35, PETRI_FLOW=14368, PETRI_PLACES=300, PETRI_TRANSITIONS=654} [2024-11-22 13:52:56,965 INFO L277 CegarLoopForPetriNet]: 23 programPoint places, 277 predicate places. [2024-11-22 13:52:56,965 INFO L471 AbstractCegarLoop]: Abstraction has has 300 places, 654 transitions, 14368 flow [2024-11-22 13:52:56,966 INFO L472 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) [2024-11-22 13:52:56,966 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-22 13:52:56,966 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-22 13:52:56,971 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2024-11-22 13:52:57,166 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 13:52:57,166 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-22 13:52:57,167 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 13:52:57,167 INFO L85 PathProgramCache]: Analyzing trace with hash -492124575, now seen corresponding path program 10 times [2024-11-22 13:52:57,167 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 13:52:57,167 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [639057971] [2024-11-22 13:52:57,167 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-22 13:52:57,167 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 13:52:57,172 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-22 13:52:57,172 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-22 13:52:57,318 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-22 13:52:57,319 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 13:52:57,319 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [639057971] [2024-11-22 13:52:57,319 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [639057971] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-22 13:52:57,319 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2046602519] [2024-11-22 13:52:57,319 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-22 13:52:57,319 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 13:52:57,319 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-22 13:52:57,321 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-22 13:52:57,322 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-11-22 13:52:57,354 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-22 13:52:57,354 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-22 13:52:57,355 INFO L255 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 12 conjuncts are in the unsatisfiable core [2024-11-22 13:52:57,355 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-22 13:52:57,521 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-22 13:52:57,521 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-22 13:52:57,741 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-22 13:52:57,742 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2046602519] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-22 13:52:57,742 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-22 13:52:57,742 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9, 10] total 27 [2024-11-22 13:52:57,742 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1590438181] [2024-11-22 13:52:57,742 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-22 13:52:57,742 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2024-11-22 13:52:57,744 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 13:52:57,744 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2024-11-22 13:52:57,744 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=160, Invalid=596, Unknown=0, NotChecked=0, Total=756 [2024-11-22 13:52:57,750 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 21 [2024-11-22 13:52:57,751 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 300 places, 654 transitions, 14368 flow. Second operand has 28 states, 28 states have (on average 4.714285714285714) internal successors, (132), 28 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-22 13:52:57,751 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-22 13:52:57,751 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 21 [2024-11-22 13:52:57,751 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-22 13:52:58,639 INFO L124 PetriNetUnfolderBase]: 1389/2444 cut-off events. [2024-11-22 13:52:58,639 INFO L125 PetriNetUnfolderBase]: For 38071/38071 co-relation queries the response was YES. [2024-11-22 13:52:58,649 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23034 conditions, 2444 events. 1389/2444 cut-off events. For 38071/38071 co-relation queries the response was YES. Maximal size of possible extension queue 147. Compared 13609 event pairs, 16 based on Foata normal form. 3/2447 useless extension candidates. Maximal degree in co-relation 22876. Up to 1153 conditions per place. [2024-11-22 13:52:58,659 INFO L140 encePairwiseOnDemand]: 10/21 looper letters, 226 selfloop transitions, 470 changer transitions 5/702 dead transitions. [2024-11-22 13:52:58,659 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 319 places, 702 transitions, 16100 flow [2024-11-22 13:52:58,660 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2024-11-22 13:52:58,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2024-11-22 13:52:58,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 185 transitions. [2024-11-22 13:52:58,660 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.3830227743271222 [2024-11-22 13:52:58,661 INFO L175 Difference]: Start difference. First operand has 300 places, 654 transitions, 14368 flow. Second operand 23 states and 185 transitions. [2024-11-22 13:52:58,661 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 319 places, 702 transitions, 16100 flow [2024-11-22 13:52:58,939 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 304 places, 702 transitions, 15761 flow, removed 83 selfloop flow, removed 15 redundant places. [2024-11-22 13:52:58,950 INFO L231 Difference]: Finished difference. Result has 306 places, 655 transitions, 15162 flow [2024-11-22 13:52:58,950 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=13967, PETRI_DIFFERENCE_MINUEND_PLACES=282, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=650, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=464, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=185, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=15162, PETRI_PLACES=306, PETRI_TRANSITIONS=655} [2024-11-22 13:52:58,951 INFO L277 CegarLoopForPetriNet]: 23 programPoint places, 283 predicate places. [2024-11-22 13:52:58,951 INFO L471 AbstractCegarLoop]: Abstraction has has 306 places, 655 transitions, 15162 flow [2024-11-22 13:52:58,951 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 4.714285714285714) internal successors, (132), 28 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-22 13:52:58,951 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-22 13:52:58,951 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-22 13:52:58,957 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2024-11-22 13:52:59,151 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2024-11-22 13:52:59,152 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-22 13:52:59,152 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 13:52:59,152 INFO L85 PathProgramCache]: Analyzing trace with hash -185650157, now seen corresponding path program 11 times [2024-11-22 13:52:59,152 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 13:52:59,152 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [936456622] [2024-11-22 13:52:59,152 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-22 13:52:59,152 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 13:52:59,158 INFO L227 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2024-11-22 13:52:59,158 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-22 13:52:59,329 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-22 13:52:59,330 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 13:52:59,330 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [936456622] [2024-11-22 13:52:59,330 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [936456622] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-22 13:52:59,330 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [374710917] [2024-11-22 13:52:59,330 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-22 13:52:59,330 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 13:52:59,330 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-22 13:52:59,332 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-22 13:52:59,333 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-11-22 13:52:59,361 INFO L227 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2024-11-22 13:52:59,362 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-22 13:52:59,362 INFO L255 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 18 conjuncts are in the unsatisfiable core [2024-11-22 13:52:59,363 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-22 13:52:59,569 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-22 13:52:59,569 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-22 13:52:59,918 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-22 13:52:59,919 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [374710917] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-22 13:52:59,919 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-22 13:52:59,919 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 33 [2024-11-22 13:52:59,919 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [867759571] [2024-11-22 13:52:59,919 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-22 13:52:59,919 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2024-11-22 13:52:59,919 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 13:52:59,921 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2024-11-22 13:52:59,921 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=160, Invalid=962, Unknown=0, NotChecked=0, Total=1122 [2024-11-22 13:52:59,943 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 21 [2024-11-22 13:52:59,944 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 306 places, 655 transitions, 15162 flow. Second operand has 34 states, 34 states have (on average 4.705882352941177) internal successors, (160), 34 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-22 13:52:59,944 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-22 13:52:59,944 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 21 [2024-11-22 13:52:59,944 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-22 13:53:02,109 INFO L124 PetriNetUnfolderBase]: 1712/3074 cut-off events. [2024-11-22 13:53:02,109 INFO L125 PetriNetUnfolderBase]: For 56249/56249 co-relation queries the response was YES. [2024-11-22 13:53:02,122 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30555 conditions, 3074 events. 1712/3074 cut-off events. For 56249/56249 co-relation queries the response was YES. Maximal size of possible extension queue 166. Compared 18170 event pairs, 69 based on Foata normal form. 4/3078 useless extension candidates. Maximal degree in co-relation 30339. Up to 880 conditions per place. [2024-11-22 13:53:02,134 INFO L140 encePairwiseOnDemand]: 10/21 looper letters, 397 selfloop transitions, 545 changer transitions 23/966 dead transitions. [2024-11-22 13:53:02,134 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 359 places, 966 transitions, 22448 flow [2024-11-22 13:53:02,134 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2024-11-22 13:53:02,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2024-11-22 13:53:02,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 503 transitions. [2024-11-22 13:53:02,135 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4129720853858785 [2024-11-22 13:53:02,135 INFO L175 Difference]: Start difference. First operand has 306 places, 655 transitions, 15162 flow. Second operand 58 states and 503 transitions. [2024-11-22 13:53:02,135 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 359 places, 966 transitions, 22448 flow [2024-11-22 13:53:02,588 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 345 places, 966 transitions, 22295 flow, removed 35 selfloop flow, removed 14 redundant places. [2024-11-22 13:53:02,605 INFO L231 Difference]: Finished difference. Result has 365 places, 796 transitions, 20836 flow [2024-11-22 13:53:02,606 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=15027, PETRI_DIFFERENCE_MINUEND_PLACES=288, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=655, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=429, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=213, PETRI_DIFFERENCE_SUBTRAHEND_STATES=58, PETRI_FLOW=20836, PETRI_PLACES=365, PETRI_TRANSITIONS=796} [2024-11-22 13:53:02,606 INFO L277 CegarLoopForPetriNet]: 23 programPoint places, 342 predicate places. [2024-11-22 13:53:02,607 INFO L471 AbstractCegarLoop]: Abstraction has has 365 places, 796 transitions, 20836 flow [2024-11-22 13:53:02,607 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 4.705882352941177) internal successors, (160), 34 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-22 13:53:02,607 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-22 13:53:02,607 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-22 13:53:02,614 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2024-11-22 13:53:02,807 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2024-11-22 13:53:02,807 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-22 13:53:02,808 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 13:53:02,808 INFO L85 PathProgramCache]: Analyzing trace with hash 171951597, now seen corresponding path program 12 times [2024-11-22 13:53:02,808 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 13:53:02,808 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [185639714] [2024-11-22 13:53:02,808 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-22 13:53:02,808 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 13:53:02,814 INFO L227 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2024-11-22 13:53:02,815 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-22 13:53:02,980 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-22 13:53:02,980 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 13:53:02,980 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [185639714] [2024-11-22 13:53:02,981 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [185639714] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-22 13:53:02,981 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [710126018] [2024-11-22 13:53:02,981 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-22 13:53:02,981 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 13:53:02,981 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-22 13:53:02,982 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-22 13:53:02,983 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-11-22 13:53:03,012 INFO L227 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2024-11-22 13:53:03,012 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-22 13:53:03,013 INFO L255 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 18 conjuncts are in the unsatisfiable core [2024-11-22 13:53:03,014 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-22 13:53:03,193 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-22 13:53:03,193 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-22 13:53:03,515 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-22 13:53:03,516 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [710126018] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-22 13:53:03,516 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-22 13:53:03,516 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 32 [2024-11-22 13:53:03,516 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [764204576] [2024-11-22 13:53:03,516 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-22 13:53:03,516 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2024-11-22 13:53:03,516 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 13:53:03,517 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2024-11-22 13:53:03,517 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=885, Unknown=0, NotChecked=0, Total=1056 [2024-11-22 13:53:03,524 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 21 [2024-11-22 13:53:03,524 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 365 places, 796 transitions, 20836 flow. Second operand has 33 states, 33 states have (on average 4.696969696969697) internal successors, (155), 33 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-22 13:53:03,525 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-22 13:53:03,525 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 21 [2024-11-22 13:53:03,525 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-22 13:53:07,956 INFO L124 PetriNetUnfolderBase]: 2650/4793 cut-off events. [2024-11-22 13:53:07,956 INFO L125 PetriNetUnfolderBase]: For 113566/113566 co-relation queries the response was YES. [2024-11-22 13:53:07,985 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52499 conditions, 4793 events. 2650/4793 cut-off events. For 113566/113566 co-relation queries the response was YES. Maximal size of possible extension queue 227. Compared 30721 event pairs, 45 based on Foata normal form. 22/4815 useless extension candidates. Maximal degree in co-relation 52404. Up to 1365 conditions per place. [2024-11-22 13:53:08,014 INFO L140 encePairwiseOnDemand]: 9/21 looper letters, 464 selfloop transitions, 932 changer transitions 39/1436 dead transitions. [2024-11-22 13:53:08,015 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 468 places, 1436 transitions, 37281 flow [2024-11-22 13:53:08,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 109 states. [2024-11-22 13:53:08,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 109 states. [2024-11-22 13:53:08,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 873 transitions. [2024-11-22 13:53:08,017 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.381389252948886 [2024-11-22 13:53:08,017 INFO L175 Difference]: Start difference. First operand has 365 places, 796 transitions, 20836 flow. Second operand 109 states and 873 transitions. [2024-11-22 13:53:08,017 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 468 places, 1436 transitions, 37281 flow [2024-11-22 13:53:09,065 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 455 places, 1436 transitions, 36578 flow, removed 207 selfloop flow, removed 13 redundant places. [2024-11-22 13:53:09,088 INFO L231 Difference]: Finished difference. Result has 489 places, 1198 transitions, 35129 flow [2024-11-22 13:53:09,089 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=20390, PETRI_DIFFERENCE_MINUEND_PLACES=347, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=791, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=578, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=200, PETRI_DIFFERENCE_SUBTRAHEND_STATES=109, PETRI_FLOW=35129, PETRI_PLACES=489, PETRI_TRANSITIONS=1198} [2024-11-22 13:53:09,089 INFO L277 CegarLoopForPetriNet]: 23 programPoint places, 466 predicate places. [2024-11-22 13:53:09,089 INFO L471 AbstractCegarLoop]: Abstraction has has 489 places, 1198 transitions, 35129 flow [2024-11-22 13:53:09,089 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 4.696969696969697) internal successors, (155), 33 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-22 13:53:09,089 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-22 13:53:09,089 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-22 13:53:09,095 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2024-11-22 13:53:09,290 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2024-11-22 13:53:09,290 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-22 13:53:09,290 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 13:53:09,290 INFO L85 PathProgramCache]: Analyzing trace with hash 331302923, now seen corresponding path program 13 times [2024-11-22 13:53:09,290 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 13:53:09,290 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1404856330] [2024-11-22 13:53:09,290 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-22 13:53:09,291 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 13:53:09,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 13:53:09,459 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-22 13:53:09,460 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 13:53:09,460 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1404856330] [2024-11-22 13:53:09,460 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1404856330] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-22 13:53:09,460 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [528177174] [2024-11-22 13:53:09,460 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-22 13:53:09,460 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 13:53:09,461 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-22 13:53:09,462 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-22 13:53:09,464 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-11-22 13:53:09,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 13:53:09,499 INFO L255 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 18 conjuncts are in the unsatisfiable core [2024-11-22 13:53:09,500 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-22 13:53:09,722 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-22 13:53:09,722 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-22 13:53:10,080 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-22 13:53:10,080 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [528177174] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-22 13:53:10,080 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-22 13:53:10,080 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 33 [2024-11-22 13:53:10,080 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [947122376] [2024-11-22 13:53:10,080 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-22 13:53:10,081 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2024-11-22 13:53:10,081 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 13:53:10,081 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2024-11-22 13:53:10,081 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=161, Invalid=961, Unknown=0, NotChecked=0, Total=1122 [2024-11-22 13:53:10,089 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 21 [2024-11-22 13:53:10,089 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 489 places, 1198 transitions, 35129 flow. Second operand has 34 states, 34 states have (on average 4.705882352941177) internal successors, (160), 34 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-22 13:53:10,089 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-22 13:53:10,089 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 21 [2024-11-22 13:53:10,089 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-22 13:53:14,190 INFO L124 PetriNetUnfolderBase]: 2826/5111 cut-off events. [2024-11-22 13:53:14,190 INFO L125 PetriNetUnfolderBase]: For 165761/165761 co-relation queries the response was YES. [2024-11-22 13:53:14,230 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62027 conditions, 5111 events. 2826/5111 cut-off events. For 165761/165761 co-relation queries the response was YES. Maximal size of possible extension queue 251. Compared 33305 event pairs, 55 based on Foata normal form. 5/5116 useless extension candidates. Maximal degree in co-relation 61587. Up to 1584 conditions per place. [2024-11-22 13:53:14,267 INFO L140 encePairwiseOnDemand]: 9/21 looper letters, 464 selfloop transitions, 1001 changer transitions 25/1491 dead transitions. [2024-11-22 13:53:14,268 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 560 places, 1491 transitions, 43422 flow [2024-11-22 13:53:14,268 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2024-11-22 13:53:14,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2024-11-22 13:53:14,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 659 transitions. [2024-11-22 13:53:14,270 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.39722724532851117 [2024-11-22 13:53:14,270 INFO L175 Difference]: Start difference. First operand has 489 places, 1198 transitions, 35129 flow. Second operand 79 states and 659 transitions. [2024-11-22 13:53:14,270 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 560 places, 1491 transitions, 43422 flow [2024-11-22 13:53:16,253 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 533 places, 1491 transitions, 42053 flow, removed 359 selfloop flow, removed 27 redundant places. [2024-11-22 13:53:16,282 INFO L231 Difference]: Finished difference. Result has 551 places, 1306 transitions, 40365 flow [2024-11-22 13:53:16,283 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=34004, PETRI_DIFFERENCE_MINUEND_PLACES=455, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1197, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=893, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=291, PETRI_DIFFERENCE_SUBTRAHEND_STATES=79, PETRI_FLOW=40365, PETRI_PLACES=551, PETRI_TRANSITIONS=1306} [2024-11-22 13:53:16,284 INFO L277 CegarLoopForPetriNet]: 23 programPoint places, 528 predicate places. [2024-11-22 13:53:16,284 INFO L471 AbstractCegarLoop]: Abstraction has has 551 places, 1306 transitions, 40365 flow [2024-11-22 13:53:16,284 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 4.705882352941177) internal successors, (160), 34 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-22 13:53:16,284 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-22 13:53:16,284 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-22 13:53:16,290 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2024-11-22 13:53:16,488 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2024-11-22 13:53:16,489 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-22 13:53:16,489 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 13:53:16,489 INFO L85 PathProgramCache]: Analyzing trace with hash 1921420705, now seen corresponding path program 14 times [2024-11-22 13:53:16,489 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 13:53:16,489 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [7904921] [2024-11-22 13:53:16,489 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-22 13:53:16,489 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 13:53:16,494 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-22 13:53:16,494 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-22 13:53:16,647 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-22 13:53:16,648 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 13:53:16,648 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [7904921] [2024-11-22 13:53:16,648 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [7904921] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-22 13:53:16,648 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1307055677] [2024-11-22 13:53:16,648 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-22 13:53:16,648 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 13:53:16,648 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-22 13:53:16,650 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-22 13:53:16,650 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2024-11-22 13:53:16,678 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-22 13:53:16,678 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-22 13:53:16,679 INFO L255 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 18 conjuncts are in the unsatisfiable core [2024-11-22 13:53:16,679 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-22 13:53:16,878 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-22 13:53:16,878 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-22 13:53:17,264 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-22 13:53:17,264 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1307055677] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-22 13:53:17,264 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-22 13:53:17,264 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 33 [2024-11-22 13:53:17,264 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [235766710] [2024-11-22 13:53:17,264 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-22 13:53:17,265 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2024-11-22 13:53:17,265 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 13:53:17,265 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2024-11-22 13:53:17,265 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=164, Invalid=958, Unknown=0, NotChecked=0, Total=1122 [2024-11-22 13:53:17,282 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 21 [2024-11-22 13:53:17,283 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 551 places, 1306 transitions, 40365 flow. Second operand has 34 states, 34 states have (on average 4.676470588235294) internal successors, (159), 34 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-22 13:53:17,283 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-22 13:53:17,283 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 21 [2024-11-22 13:53:17,283 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-22 13:53:21,810 INFO L124 PetriNetUnfolderBase]: 3348/6027 cut-off events. [2024-11-22 13:53:21,810 INFO L125 PetriNetUnfolderBase]: For 217559/217559 co-relation queries the response was YES. [2024-11-22 13:53:21,859 INFO L83 FinitePrefix]: Finished finitePrefix Result has 76640 conditions, 6027 events. 3348/6027 cut-off events. For 217559/217559 co-relation queries the response was YES. Maximal size of possible extension queue 337. Compared 40681 event pairs, 74 based on Foata normal form. 5/6032 useless extension candidates. Maximal degree in co-relation 76103. Up to 1965 conditions per place. [2024-11-22 13:53:21,902 INFO L140 encePairwiseOnDemand]: 9/21 looper letters, 551 selfloop transitions, 1209 changer transitions 18/1779 dead transitions. [2024-11-22 13:53:21,902 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 632 places, 1779 transitions, 55203 flow [2024-11-22 13:53:21,902 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2024-11-22 13:53:21,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2024-11-22 13:53:21,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 713 transitions. [2024-11-22 13:53:21,904 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.3947951273532669 [2024-11-22 13:53:21,904 INFO L175 Difference]: Start difference. First operand has 551 places, 1306 transitions, 40365 flow. Second operand 86 states and 713 transitions. [2024-11-22 13:53:21,904 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 632 places, 1779 transitions, 55203 flow [2024-11-22 13:53:24,989 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 601 places, 1779 transitions, 54342 flow, removed 70 selfloop flow, removed 31 redundant places. [2024-11-22 13:53:25,025 INFO L231 Difference]: Finished difference. Result has 634 places, 1580 transitions, 52757 flow [2024-11-22 13:53:25,026 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=39633, PETRI_DIFFERENCE_MINUEND_PLACES=516, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1306, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=944, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=288, PETRI_DIFFERENCE_SUBTRAHEND_STATES=86, PETRI_FLOW=52757, PETRI_PLACES=634, PETRI_TRANSITIONS=1580} [2024-11-22 13:53:25,027 INFO L277 CegarLoopForPetriNet]: 23 programPoint places, 611 predicate places. [2024-11-22 13:53:25,027 INFO L471 AbstractCegarLoop]: Abstraction has has 634 places, 1580 transitions, 52757 flow [2024-11-22 13:53:25,027 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 4.676470588235294) internal successors, (159), 34 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-22 13:53:25,027 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-22 13:53:25,027 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-22 13:53:25,034 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2024-11-22 13:53:25,228 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 13:53:25,228 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-22 13:53:25,228 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 13:53:25,229 INFO L85 PathProgramCache]: Analyzing trace with hash -105111933, now seen corresponding path program 15 times [2024-11-22 13:53:25,229 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 13:53:25,229 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [142794905] [2024-11-22 13:53:25,229 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-22 13:53:25,229 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 13:53:25,234 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-11-22 13:53:25,234 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-22 13:53:25,384 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-22 13:53:25,385 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 13:53:25,385 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [142794905] [2024-11-22 13:53:25,385 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [142794905] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-22 13:53:25,385 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1580959381] [2024-11-22 13:53:25,385 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-22 13:53:25,385 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 13:53:25,385 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-22 13:53:25,387 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-22 13:53:25,388 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2024-11-22 13:53:25,418 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-11-22 13:53:25,418 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-22 13:53:25,419 INFO L255 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 18 conjuncts are in the unsatisfiable core [2024-11-22 13:53:25,420 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-22 13:53:25,614 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-22 13:53:25,614 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-22 13:53:25,985 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-22 13:53:25,985 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1580959381] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-22 13:53:25,985 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-22 13:53:25,985 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 33 [2024-11-22 13:53:25,985 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1551827559] [2024-11-22 13:53:25,985 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-22 13:53:25,985 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2024-11-22 13:53:25,986 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 13:53:25,986 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2024-11-22 13:53:25,986 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=967, Unknown=0, NotChecked=0, Total=1122 [2024-11-22 13:53:25,996 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 21 [2024-11-22 13:53:25,996 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 634 places, 1580 transitions, 52757 flow. Second operand has 34 states, 34 states have (on average 4.705882352941177) internal successors, (160), 34 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-22 13:53:25,997 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-22 13:53:25,997 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 21 [2024-11-22 13:53:25,997 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-22 13:53:30,968 INFO L124 PetriNetUnfolderBase]: 3652/6582 cut-off events. [2024-11-22 13:53:30,968 INFO L125 PetriNetUnfolderBase]: For 274661/274661 co-relation queries the response was YES. [2024-11-22 13:53:31,021 INFO L83 FinitePrefix]: Finished finitePrefix Result has 89839 conditions, 6582 events. 3652/6582 cut-off events. For 274661/274661 co-relation queries the response was YES. Maximal size of possible extension queue 362. Compared 45419 event pairs, 83 based on Foata normal form. 3/6585 useless extension candidates. Maximal degree in co-relation 89684. Up to 3096 conditions per place. [2024-11-22 13:53:31,057 INFO L140 encePairwiseOnDemand]: 9/21 looper letters, 702 selfloop transitions, 1144 changer transitions 20/1867 dead transitions. [2024-11-22 13:53:31,057 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 696 places, 1867 transitions, 63060 flow [2024-11-22 13:53:31,057 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2024-11-22 13:53:31,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2024-11-22 13:53:31,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 526 transitions. [2024-11-22 13:53:31,058 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.3795093795093795 [2024-11-22 13:53:31,058 INFO L175 Difference]: Start difference. First operand has 634 places, 1580 transitions, 52757 flow. Second operand 66 states and 526 transitions. [2024-11-22 13:53:31,058 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 696 places, 1867 transitions, 63060 flow [2024-11-22 13:53:35,732 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 684 places, 1867 transitions, 62615 flow, removed 164 selfloop flow, removed 12 redundant places. [2024-11-22 13:53:35,774 INFO L231 Difference]: Finished difference. Result has 712 places, 1726 transitions, 62004 flow [2024-11-22 13:53:35,775 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=52342, PETRI_DIFFERENCE_MINUEND_PLACES=619, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1580, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=998, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=510, PETRI_DIFFERENCE_SUBTRAHEND_STATES=66, PETRI_FLOW=62004, PETRI_PLACES=712, PETRI_TRANSITIONS=1726} [2024-11-22 13:53:35,775 INFO L277 CegarLoopForPetriNet]: 23 programPoint places, 689 predicate places. [2024-11-22 13:53:35,776 INFO L471 AbstractCegarLoop]: Abstraction has has 712 places, 1726 transitions, 62004 flow [2024-11-22 13:53:35,776 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 4.705882352941177) internal successors, (160), 34 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-22 13:53:35,776 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-22 13:53:35,776 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-22 13:53:35,782 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2024-11-22 13:53:35,980 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2024-11-22 13:53:35,980 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-22 13:53:35,981 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 13:53:35,981 INFO L85 PathProgramCache]: Analyzing trace with hash 1879233675, now seen corresponding path program 16 times [2024-11-22 13:53:35,981 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 13:53:35,981 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1007833089] [2024-11-22 13:53:35,981 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-22 13:53:35,981 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 13:53:35,986 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-22 13:53:35,986 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-22 13:53:36,130 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-22 13:53:36,131 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 13:53:36,131 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1007833089] [2024-11-22 13:53:36,131 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1007833089] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-22 13:53:36,131 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [264104619] [2024-11-22 13:53:36,131 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-22 13:53:36,131 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 13:53:36,131 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-22 13:53:36,133 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) [2024-11-22 13:53:36,134 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2024-11-22 13:53:36,166 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-22 13:53:36,166 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-22 13:53:36,167 INFO L255 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 18 conjuncts are in the unsatisfiable core [2024-11-22 13:53:36,168 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-22 13:53:36,378 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-22 13:53:36,378 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-22 13:53:36,685 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-22 13:53:36,685 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [264104619] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-22 13:53:36,685 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-22 13:53:36,685 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 12] total 34 [2024-11-22 13:53:36,685 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [501904760] [2024-11-22 13:53:36,685 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-22 13:53:36,685 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2024-11-22 13:53:36,686 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 13:53:36,686 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2024-11-22 13:53:36,686 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=187, Invalid=1003, Unknown=0, NotChecked=0, Total=1190 [2024-11-22 13:53:36,689 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 21 [2024-11-22 13:53:36,690 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 712 places, 1726 transitions, 62004 flow. Second operand has 35 states, 35 states have (on average 4.628571428571429) internal successors, (162), 35 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-22 13:53:36,690 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-22 13:53:36,690 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 21 [2024-11-22 13:53:36,690 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-22 13:53:42,798 INFO L124 PetriNetUnfolderBase]: 4000/7217 cut-off events. [2024-11-22 13:53:42,798 INFO L125 PetriNetUnfolderBase]: For 344510/344510 co-relation queries the response was YES. [2024-11-22 13:53:42,864 INFO L83 FinitePrefix]: Finished finitePrefix Result has 102321 conditions, 7217 events. 4000/7217 cut-off events. For 344510/344510 co-relation queries the response was YES. Maximal size of possible extension queue 408. Compared 50944 event pairs, 91 based on Foata normal form. 5/7222 useless extension candidates. Maximal degree in co-relation 101860. Up to 3275 conditions per place. [2024-11-22 13:53:42,907 INFO L140 encePairwiseOnDemand]: 10/21 looper letters, 604 selfloop transitions, 1456 changer transitions 18/2079 dead transitions. [2024-11-22 13:53:42,907 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 784 places, 2079 transitions, 73287 flow [2024-11-22 13:53:42,907 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2024-11-22 13:53:42,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2024-11-22 13:53:42,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 581 transitions. [2024-11-22 13:53:42,908 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.36403508771929827 [2024-11-22 13:53:42,908 INFO L175 Difference]: Start difference. First operand has 712 places, 1726 transitions, 62004 flow. Second operand 76 states and 581 transitions. [2024-11-22 13:53:42,908 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 784 places, 2079 transitions, 73287 flow [2024-11-22 13:53:49,293 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 758 places, 2079 transitions, 73056 flow, removed 35 selfloop flow, removed 26 redundant places. [2024-11-22 13:53:49,341 INFO L231 Difference]: Finished difference. Result has 787 places, 1935 transitions, 73211 flow [2024-11-22 13:53:49,342 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=61789, PETRI_DIFFERENCE_MINUEND_PLACES=683, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1726, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1285, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=397, PETRI_DIFFERENCE_SUBTRAHEND_STATES=76, PETRI_FLOW=73211, PETRI_PLACES=787, PETRI_TRANSITIONS=1935} [2024-11-22 13:53:49,342 INFO L277 CegarLoopForPetriNet]: 23 programPoint places, 764 predicate places. [2024-11-22 13:53:49,343 INFO L471 AbstractCegarLoop]: Abstraction has has 787 places, 1935 transitions, 73211 flow [2024-11-22 13:53:49,343 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 4.628571428571429) internal successors, (162), 35 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-22 13:53:49,343 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-22 13:53:49,343 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-22 13:53:49,349 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2024-11-22 13:53:49,543 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2024-11-22 13:53:49,543 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-22 13:53:49,544 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 13:53:49,544 INFO L85 PathProgramCache]: Analyzing trace with hash 1005492995, now seen corresponding path program 17 times [2024-11-22 13:53:49,544 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 13:53:49,544 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1853251073] [2024-11-22 13:53:49,544 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-22 13:53:49,544 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 13:53:49,549 INFO L227 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2024-11-22 13:53:49,551 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-22 13:53:49,683 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-22 13:53:49,683 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 13:53:49,683 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1853251073] [2024-11-22 13:53:49,683 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1853251073] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-22 13:53:49,683 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [705975079] [2024-11-22 13:53:49,683 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-22 13:53:49,683 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 13:53:49,683 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-22 13:53:49,684 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) [2024-11-22 13:53:49,686 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2024-11-22 13:53:49,713 INFO L227 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2024-11-22 13:53:49,713 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-22 13:53:49,714 INFO L255 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 19 conjuncts are in the unsatisfiable core [2024-11-22 13:53:49,714 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-22 13:53:49,873 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-22 13:53:49,873 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-22 13:53:50,080 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-22 13:53:50,080 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [705975079] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-22 13:53:50,080 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-22 13:53:50,080 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13, 13] total 34 [2024-11-22 13:53:50,080 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1660620378] [2024-11-22 13:53:50,080 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-22 13:53:50,080 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2024-11-22 13:53:50,080 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 13:53:50,081 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2024-11-22 13:53:50,081 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=192, Invalid=998, Unknown=0, NotChecked=0, Total=1190 [2024-11-22 13:53:50,085 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 21 [2024-11-22 13:53:50,085 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 787 places, 1935 transitions, 73211 flow. Second operand has 35 states, 35 states have (on average 4.485714285714286) internal successors, (157), 35 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-22 13:53:50,085 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-22 13:53:50,086 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 21 [2024-11-22 13:53:50,086 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-22 13:53:55,571 INFO L124 PetriNetUnfolderBase]: 4088/7371 cut-off events. [2024-11-22 13:53:55,571 INFO L125 PetriNetUnfolderBase]: For 392486/392486 co-relation queries the response was YES. [2024-11-22 13:53:55,643 INFO L83 FinitePrefix]: Finished finitePrefix Result has 111453 conditions, 7371 events. 4088/7371 cut-off events. For 392486/392486 co-relation queries the response was YES. Maximal size of possible extension queue 415. Compared 52138 event pairs, 112 based on Foata normal form. 6/7377 useless extension candidates. Maximal degree in co-relation 111161. Up to 3062 conditions per place. [2024-11-22 13:53:55,686 INFO L140 encePairwiseOnDemand]: 10/21 looper letters, 583 selfloop transitions, 1528 changer transitions 15/2127 dead transitions. [2024-11-22 13:53:55,686 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 831 places, 2127 transitions, 81012 flow [2024-11-22 13:53:55,686 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2024-11-22 13:53:55,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2024-11-22 13:53:55,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 388 transitions. [2024-11-22 13:53:55,687 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.3770651117589893 [2024-11-22 13:53:55,687 INFO L175 Difference]: Start difference. First operand has 787 places, 1935 transitions, 73211 flow. Second operand 49 states and 388 transitions. [2024-11-22 13:53:55,687 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 831 places, 2127 transitions, 81012 flow [2024-11-22 13:54:03,344 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 805 places, 2127 transitions, 80352 flow, removed 168 selfloop flow, removed 26 redundant places. [2024-11-22 13:54:03,395 INFO L231 Difference]: Finished difference. Result has 821 places, 2001 transitions, 78938 flow [2024-11-22 13:54:03,397 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=72611, PETRI_DIFFERENCE_MINUEND_PLACES=757, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1935, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1458, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=450, PETRI_DIFFERENCE_SUBTRAHEND_STATES=49, PETRI_FLOW=78938, PETRI_PLACES=821, PETRI_TRANSITIONS=2001} [2024-11-22 13:54:03,397 INFO L277 CegarLoopForPetriNet]: 23 programPoint places, 798 predicate places. [2024-11-22 13:54:03,397 INFO L471 AbstractCegarLoop]: Abstraction has has 821 places, 2001 transitions, 78938 flow [2024-11-22 13:54:03,397 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 4.485714285714286) internal successors, (157), 35 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-22 13:54:03,397 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-22 13:54:03,397 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-22 13:54:03,403 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2024-11-22 13:54:03,598 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 13:54:03,598 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-22 13:54:03,598 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 13:54:03,598 INFO L85 PathProgramCache]: Analyzing trace with hash -1844278815, now seen corresponding path program 18 times [2024-11-22 13:54:03,598 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 13:54:03,598 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1307293835] [2024-11-22 13:54:03,598 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-22 13:54:03,599 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 13:54:03,603 INFO L227 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2024-11-22 13:54:03,603 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-22 13:54:03,747 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-22 13:54:03,747 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 13:54:03,747 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1307293835] [2024-11-22 13:54:03,748 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1307293835] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-22 13:54:03,748 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2125700044] [2024-11-22 13:54:03,748 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-22 13:54:03,748 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 13:54:03,748 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-22 13:54:03,749 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) [2024-11-22 13:54:03,750 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2024-11-22 13:54:03,780 INFO L227 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2024-11-22 13:54:03,780 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-22 13:54:03,780 INFO L255 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 18 conjuncts are in the unsatisfiable core [2024-11-22 13:54:03,781 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-22 13:54:03,965 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-22 13:54:03,965 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-22 13:54:04,286 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-22 13:54:04,286 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2125700044] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-22 13:54:04,287 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-22 13:54:04,287 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 33 [2024-11-22 13:54:04,287 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1036932407] [2024-11-22 13:54:04,287 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-22 13:54:04,287 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2024-11-22 13:54:04,287 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 13:54:04,288 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2024-11-22 13:54:04,288 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=178, Invalid=944, Unknown=0, NotChecked=0, Total=1122 [2024-11-22 13:54:04,297 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 21 [2024-11-22 13:54:04,297 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 821 places, 2001 transitions, 78938 flow. Second operand has 34 states, 34 states have (on average 4.676470588235294) internal successors, (159), 34 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-22 13:54:04,297 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-22 13:54:04,297 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 21 [2024-11-22 13:54:04,297 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-22 13:54:10,252 INFO L124 PetriNetUnfolderBase]: 4088/7367 cut-off events. [2024-11-22 13:54:10,252 INFO L125 PetriNetUnfolderBase]: For 419555/419555 co-relation queries the response was YES. [2024-11-22 13:54:10,341 INFO L83 FinitePrefix]: Finished finitePrefix Result has 116155 conditions, 7367 events. 4088/7367 cut-off events. For 419555/419555 co-relation queries the response was YES. Maximal size of possible extension queue 418. Compared 52117 event pairs, 116 based on Foata normal form. 2/7369 useless extension candidates. Maximal degree in co-relation 115850. Up to 4080 conditions per place. [2024-11-22 13:54:10,390 INFO L140 encePairwiseOnDemand]: 10/21 looper letters, 799 selfloop transitions, 1308 changer transitions 12/2120 dead transitions. [2024-11-22 13:54:10,391 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 869 places, 2120 transitions, 84639 flow [2024-11-22 13:54:10,391 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2024-11-22 13:54:10,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2024-11-22 13:54:10,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 411 transitions. [2024-11-22 13:54:10,392 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.38375350140056025 [2024-11-22 13:54:10,392 INFO L175 Difference]: Start difference. First operand has 821 places, 2001 transitions, 78938 flow. Second operand 51 states and 411 transitions. [2024-11-22 13:54:10,392 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 869 places, 2120 transitions, 84639 flow