./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/weaver/popl20-nonblocking-cntr-alt.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 7724a2de Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../../../trunk/examples/svcomp/weaver/popl20-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 0.2.4-tmp.fs.goblint-validation-7724a2d-m [2024-06-27 17:02:11,618 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-06-27 17:02:11,695 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-06-27 17:02:11,705 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-06-27 17:02:11,706 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-06-27 17:02:11,733 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-06-27 17:02:11,736 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-06-27 17:02:11,737 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-06-27 17:02:11,738 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-06-27 17:02:11,741 INFO L153 SettingsManager]: * Use memory slicer=true [2024-06-27 17:02:11,742 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-06-27 17:02:11,742 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-06-27 17:02:11,743 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-06-27 17:02:11,744 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-06-27 17:02:11,745 INFO L153 SettingsManager]: * Use SBE=true [2024-06-27 17:02:11,745 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-06-27 17:02:11,745 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-06-27 17:02:11,745 INFO L153 SettingsManager]: * sizeof long=4 [2024-06-27 17:02:11,746 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-06-27 17:02:11,746 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-06-27 17:02:11,746 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-06-27 17:02:11,747 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-06-27 17:02:11,747 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-06-27 17:02:11,747 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-06-27 17:02:11,747 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-06-27 17:02:11,748 INFO L153 SettingsManager]: * sizeof long double=12 [2024-06-27 17:02:11,748 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-06-27 17:02:11,748 INFO L153 SettingsManager]: * Use constant arrays=true [2024-06-27 17:02:11,749 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-06-27 17:02:11,749 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-06-27 17:02:11,750 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-06-27 17:02:11,750 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-06-27 17:02:11,751 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-27 17:02:11,751 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-06-27 17:02:11,751 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-06-27 17:02:11,751 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-06-27 17:02:11,752 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-06-27 17:02:11,752 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-06-27 17:02:11,752 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-06-27 17:02:11,752 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-06-27 17:02:11,752 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-06-27 17:02:11,753 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-06-27 17:02:11,753 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-06-27 17:02:11,753 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 0ead2366baa94ec77674f75cd829f45857f5651e204e91d33a749a2af2868461 [2024-06-27 17:02:12,009 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-06-27 17:02:12,030 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-06-27 17:02:12,033 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-06-27 17:02:12,034 INFO L270 PluginConnector]: Initializing CDTParser... [2024-06-27 17:02:12,034 INFO L274 PluginConnector]: CDTParser initialized [2024-06-27 17:02:12,035 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/popl20-nonblocking-cntr-alt.wvr.c [2024-06-27 17:02:13,229 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-06-27 17:02:13,426 INFO L384 CDTParser]: Found 1 translation units. [2024-06-27 17:02:13,426 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-nonblocking-cntr-alt.wvr.c [2024-06-27 17:02:13,433 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/367d55eeb/cadd862f18b447cdab428d29f91ba2c0/FLAG6ed4aa3d3 [2024-06-27 17:02:13,447 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/367d55eeb/cadd862f18b447cdab428d29f91ba2c0 [2024-06-27 17:02:13,452 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-06-27 17:02:13,454 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-06-27 17:02:13,459 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-06-27 17:02:13,459 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-06-27 17:02:13,464 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-06-27 17:02:13,466 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.06 05:02:13" (1/1) ... [2024-06-27 17:02:13,467 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6e732010 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 05:02:13, skipping insertion in model container [2024-06-27 17:02:13,468 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.06 05:02:13" (1/1) ... [2024-06-27 17:02:13,511 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-06-27 17:02:13,691 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-nonblocking-cntr-alt.wvr.c[2124,2137] [2024-06-27 17:02:13,697 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-27 17:02:13,709 INFO L202 MainTranslator]: Completed pre-run [2024-06-27 17:02:13,731 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-nonblocking-cntr-alt.wvr.c[2124,2137] [2024-06-27 17:02:13,731 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-27 17:02:13,756 INFO L206 MainTranslator]: Completed translation [2024-06-27 17:02:13,756 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 05:02:13 WrapperNode [2024-06-27 17:02:13,757 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-06-27 17:02:13,758 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-06-27 17:02:13,758 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-06-27 17:02:13,758 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-06-27 17:02:13,764 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 05:02:13" (1/1) ... [2024-06-27 17:02:13,772 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 05:02:13" (1/1) ... [2024-06-27 17:02:13,807 INFO L138 Inliner]: procedures = 20, calls = 14, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 46 [2024-06-27 17:02:13,812 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-06-27 17:02:13,813 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-06-27 17:02:13,813 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-06-27 17:02:13,813 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-06-27 17:02:13,823 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 05:02:13" (1/1) ... [2024-06-27 17:02:13,824 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 05:02:13" (1/1) ... [2024-06-27 17:02:13,828 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 05:02:13" (1/1) ... [2024-06-27 17:02:13,840 INFO L175 MemorySlicer]: Split 2 memory accesses to 1 slices as follows [2]. 100 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2]. The 0 writes are split as follows [0]. [2024-06-27 17:02:13,840 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 05:02:13" (1/1) ... [2024-06-27 17:02:13,841 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 05:02:13" (1/1) ... [2024-06-27 17:02:13,843 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 05:02:13" (1/1) ... [2024-06-27 17:02:13,846 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 05:02:13" (1/1) ... [2024-06-27 17:02:13,847 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 05:02:13" (1/1) ... [2024-06-27 17:02:13,848 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 05:02:13" (1/1) ... [2024-06-27 17:02:13,849 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-06-27 17:02:13,850 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-06-27 17:02:13,850 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-06-27 17:02:13,851 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-06-27 17:02:13,851 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 05:02:13" (1/1) ... [2024-06-27 17:02:13,856 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-27 17:02:13,868 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 17:02:13,880 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-06-27 17:02:13,894 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-06-27 17:02:13,933 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-06-27 17:02:13,933 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2024-06-27 17:02:13,933 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2024-06-27 17:02:13,934 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2024-06-27 17:02:13,934 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2024-06-27 17:02:13,934 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-06-27 17:02:13,934 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-06-27 17:02:13,936 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-06-27 17:02:13,936 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-06-27 17:02:13,936 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-06-27 17:02:13,938 WARN L214 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2024-06-27 17:02:14,003 INFO L244 CfgBuilder]: Building ICFG [2024-06-27 17:02:14,005 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-06-27 17:02:14,208 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-06-27 17:02:14,209 INFO L293 CfgBuilder]: Performing block encoding [2024-06-27 17:02:14,325 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-06-27 17:02:14,326 INFO L320 CfgBuilder]: Removed 2 assume(true) statements. [2024-06-27 17:02:14,326 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.06 05:02:14 BoogieIcfgContainer [2024-06-27 17:02:14,326 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-06-27 17:02:14,328 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-06-27 17:02:14,329 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-06-27 17:02:14,332 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-06-27 17:02:14,332 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.06 05:02:13" (1/3) ... [2024-06-27 17:02:14,333 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5fcf6bae and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.06 05:02:14, skipping insertion in model container [2024-06-27 17:02:14,333 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 05:02:13" (2/3) ... [2024-06-27 17:02:14,333 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5fcf6bae and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.06 05:02:14, skipping insertion in model container [2024-06-27 17:02:14,333 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.06 05:02:14" (3/3) ... [2024-06-27 17:02:14,335 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-nonblocking-cntr-alt.wvr.c [2024-06-27 17:02:14,342 WARN L146 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2024-06-27 17:02:14,351 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-06-27 17:02:14,351 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-06-27 17:02:14,352 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-06-27 17:02:14,385 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2024-06-27 17:02:14,413 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 26 places, 21 transitions, 56 flow [2024-06-27 17:02:14,433 INFO L124 PetriNetUnfolderBase]: 2/19 cut-off events. [2024-06-27 17:02:14,433 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-06-27 17:02:14,444 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. [2024-06-27 17:02:14,445 INFO L82 GeneralOperation]: Start removeDead. Operand has 26 places, 21 transitions, 56 flow [2024-06-27 17:02:14,448 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 23 places, 18 transitions, 48 flow [2024-06-27 17:02:14,456 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-27 17:02:14,462 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopHeads, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@3b681ce3, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-27 17:02:14,463 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2024-06-27 17:02:14,470 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-27 17:02:14,470 INFO L124 PetriNetUnfolderBase]: 2/17 cut-off events. [2024-06-27 17:02:14,470 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-06-27 17:02:14,471 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:02:14,471 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:02:14,472 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-06-27 17:02:14,476 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:02:14,477 INFO L85 PathProgramCache]: Analyzing trace with hash 1126928125, now seen corresponding path program 1 times [2024-06-27 17:02:14,485 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:02:14,485 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1080013264] [2024-06-27 17:02:14,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:02:14,486 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:02:14,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:02:14,810 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:02:14,810 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:02:14,810 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1080013264] [2024-06-27 17:02:14,811 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1080013264] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:02:14,811 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:02:14,812 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-27 17:02:14,813 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [22642434] [2024-06-27 17:02:14,814 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:02:14,822 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-27 17:02:14,827 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:02:14,856 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-27 17:02:14,857 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-06-27 17:02:14,864 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 21 [2024-06-27 17:02:14,866 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) [2024-06-27 17:02:14,866 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:02:14,867 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 21 [2024-06-27 17:02:14,867 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:02:14,988 INFO L124 PetriNetUnfolderBase]: 61/128 cut-off events. [2024-06-27 17:02:14,989 INFO L125 PetriNetUnfolderBase]: For 14/14 co-relation queries the response was YES. [2024-06-27 17:02:14,990 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 386 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. [2024-06-27 17:02:14,992 INFO L140 encePairwiseOnDemand]: 17/21 looper letters, 19 selfloop transitions, 3 changer transitions 0/25 dead transitions. [2024-06-27 17:02:14,992 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 26 places, 25 transitions, 109 flow [2024-06-27 17:02:14,993 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-27 17:02:14,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-27 17:02:15,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 43 transitions. [2024-06-27 17:02:15,003 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5119047619047619 [2024-06-27 17:02:15,005 INFO L175 Difference]: Start difference. First operand has 23 places, 18 transitions, 48 flow. Second operand 4 states and 43 transitions. [2024-06-27 17:02:15,006 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 26 places, 25 transitions, 109 flow [2024-06-27 17:02:15,008 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 22 places, 25 transitions, 99 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-06-27 17:02:15,010 INFO L231 Difference]: Finished difference. Result has 23 places, 19 transitions, 54 flow [2024-06-27 17:02:15,012 INFO L264 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} [2024-06-27 17:02:15,015 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 0 predicate places. [2024-06-27 17:02:15,015 INFO L495 AbstractCegarLoop]: Abstraction has has 23 places, 19 transitions, 54 flow [2024-06-27 17:02:15,016 INFO L496 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) [2024-06-27 17:02:15,016 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:02:15,016 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:02:15,017 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-06-27 17:02:15,017 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-06-27 17:02:15,017 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:02:15,018 INFO L85 PathProgramCache]: Analyzing trace with hash -1437000289, now seen corresponding path program 1 times [2024-06-27 17:02:15,018 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:02:15,018 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [312566212] [2024-06-27 17:02:15,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:02:15,019 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:02:15,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:02:15,106 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-06-27 17:02:15,106 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:02:15,106 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [312566212] [2024-06-27 17:02:15,107 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [312566212] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:02:15,107 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:02:15,107 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-27 17:02:15,107 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [44739185] [2024-06-27 17:02:15,108 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:02:15,109 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-27 17:02:15,109 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:02:15,110 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-27 17:02:15,110 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-06-27 17:02:15,113 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 21 [2024-06-27 17:02:15,114 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) [2024-06-27 17:02:15,114 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:02:15,114 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 21 [2024-06-27 17:02:15,114 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:02:15,194 INFO L124 PetriNetUnfolderBase]: 89/179 cut-off events. [2024-06-27 17:02:15,194 INFO L125 PetriNetUnfolderBase]: For 67/67 co-relation queries the response was YES. [2024-06-27 17:02:15,195 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. [2024-06-27 17:02:15,197 INFO L140 encePairwiseOnDemand]: 17/21 looper letters, 22 selfloop transitions, 3 changer transitions 0/28 dead transitions. [2024-06-27 17:02:15,197 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 26 places, 28 transitions, 133 flow [2024-06-27 17:02:15,200 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-27 17:02:15,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-27 17:02:15,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 44 transitions. [2024-06-27 17:02:15,201 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5238095238095238 [2024-06-27 17:02:15,201 INFO L175 Difference]: Start difference. First operand has 23 places, 19 transitions, 54 flow. Second operand 4 states and 44 transitions. [2024-06-27 17:02:15,201 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 26 places, 28 transitions, 133 flow [2024-06-27 17:02:15,202 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 24 places, 28 transitions, 127 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-06-27 17:02:15,203 INFO L231 Difference]: Finished difference. Result has 25 places, 20 transitions, 64 flow [2024-06-27 17:02:15,204 INFO L264 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} [2024-06-27 17:02:15,204 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 2 predicate places. [2024-06-27 17:02:15,205 INFO L495 AbstractCegarLoop]: Abstraction has has 25 places, 20 transitions, 64 flow [2024-06-27 17:02:15,205 INFO L496 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) [2024-06-27 17:02:15,205 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:02:15,205 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:02:15,206 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-06-27 17:02:15,206 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-06-27 17:02:15,207 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:02:15,207 INFO L85 PathProgramCache]: Analyzing trace with hash 1087690981, now seen corresponding path program 1 times [2024-06-27 17:02:15,207 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:02:15,207 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1602496540] [2024-06-27 17:02:15,207 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:02:15,208 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:02:15,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:02:15,721 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:02:15,722 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:02:15,724 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1602496540] [2024-06-27 17:02:15,725 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1602496540] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 17:02:15,726 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1470419716] [2024-06-27 17:02:15,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:02:15,726 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 17:02:15,726 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 17:02:15,732 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-06-27 17:02:15,739 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-06-27 17:02:15,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:02:15,796 INFO L262 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 12 conjunts are in the unsatisfiable core [2024-06-27 17:02:15,824 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 17:02:16,174 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:02:16,174 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 17:02:16,693 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:02:16,694 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1470419716] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 17:02:16,694 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 17:02:16,694 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 23 [2024-06-27 17:02:16,695 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1153569117] [2024-06-27 17:02:16,695 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 17:02:16,695 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2024-06-27 17:02:16,696 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:02:16,697 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2024-06-27 17:02:16,697 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=144, Invalid=408, Unknown=0, NotChecked=0, Total=552 [2024-06-27 17:02:16,722 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 21 [2024-06-27 17:02:16,723 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) [2024-06-27 17:02:16,723 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:02:16,723 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 21 [2024-06-27 17:02:16,723 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:02:17,646 INFO L124 PetriNetUnfolderBase]: 387/665 cut-off events. [2024-06-27 17:02:17,647 INFO L125 PetriNetUnfolderBase]: For 193/193 co-relation queries the response was YES. [2024-06-27 17:02:17,649 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. [2024-06-27 17:02:17,652 INFO L140 encePairwiseOnDemand]: 9/21 looper letters, 74 selfloop transitions, 53 changer transitions 15/143 dead transitions. [2024-06-27 17:02:17,653 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 143 transitions, 708 flow [2024-06-27 17:02:17,653 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2024-06-27 17:02:17,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2024-06-27 17:02:17,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 215 transitions. [2024-06-27 17:02:17,657 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39377289377289376 [2024-06-27 17:02:17,657 INFO L175 Difference]: Start difference. First operand has 25 places, 20 transitions, 64 flow. Second operand 26 states and 215 transitions. [2024-06-27 17:02:17,657 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 143 transitions, 708 flow [2024-06-27 17:02:17,659 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 48 places, 143 transitions, 696 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-06-27 17:02:17,662 INFO L231 Difference]: Finished difference. Result has 65 places, 76 transitions, 504 flow [2024-06-27 17:02:17,662 INFO L264 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} [2024-06-27 17:02:17,663 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 42 predicate places. [2024-06-27 17:02:17,663 INFO L495 AbstractCegarLoop]: Abstraction has has 65 places, 76 transitions, 504 flow [2024-06-27 17:02:17,663 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 4.791666666666667) internal successors, (115), 24 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:02:17,663 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:02:17,664 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:02:17,682 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-06-27 17:02:17,878 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 17:02:17,879 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-06-27 17:02:17,879 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:02:17,880 INFO L85 PathProgramCache]: Analyzing trace with hash -1244966769, now seen corresponding path program 2 times [2024-06-27 17:02:17,880 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:02:17,880 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2022974964] [2024-06-27 17:02:17,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:02:17,881 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:02:17,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:02:18,080 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:02:18,081 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:02:18,081 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2022974964] [2024-06-27 17:02:18,081 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2022974964] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 17:02:18,081 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [223191806] [2024-06-27 17:02:18,081 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-06-27 17:02:18,082 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 17:02:18,082 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 17:02:18,083 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-06-27 17:02:18,092 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-06-27 17:02:18,138 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-06-27 17:02:18,138 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 17:02:18,153 INFO L262 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 12 conjunts are in the unsatisfiable core [2024-06-27 17:02:18,155 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 17:02:18,336 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:02:18,337 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 17:02:18,749 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:02:18,750 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [223191806] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 17:02:18,750 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 17:02:18,750 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 23 [2024-06-27 17:02:18,750 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [685646442] [2024-06-27 17:02:18,750 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 17:02:18,751 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2024-06-27 17:02:18,751 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:02:18,752 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2024-06-27 17:02:18,752 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=433, Unknown=0, NotChecked=0, Total=552 [2024-06-27 17:02:18,759 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 21 [2024-06-27 17:02:18,759 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 76 transitions, 504 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) [2024-06-27 17:02:18,759 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:02:18,759 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 21 [2024-06-27 17:02:18,760 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:02:19,477 INFO L124 PetriNetUnfolderBase]: 573/1013 cut-off events. [2024-06-27 17:02:19,478 INFO L125 PetriNetUnfolderBase]: For 2645/2645 co-relation queries the response was YES. [2024-06-27 17:02:19,483 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4237 conditions, 1013 events. 573/1013 cut-off events. For 2645/2645 co-relation queries the response was YES. Maximal size of possible extension queue 71. Compared 4701 event pairs, 35 based on Foata normal form. 2/1015 useless extension candidates. Maximal degree in co-relation 4191. Up to 290 conditions per place. [2024-06-27 17:02:19,488 INFO L140 encePairwiseOnDemand]: 10/21 looper letters, 104 selfloop transitions, 107 changer transitions 28/240 dead transitions. [2024-06-27 17:02:19,488 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 86 places, 240 transitions, 1958 flow [2024-06-27 17:02:19,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2024-06-27 17:02:19,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2024-06-27 17:02:19,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 227 transitions. [2024-06-27 17:02:19,490 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4503968253968254 [2024-06-27 17:02:19,491 INFO L175 Difference]: Start difference. First operand has 65 places, 76 transitions, 504 flow. Second operand 24 states and 227 transitions. [2024-06-27 17:02:19,491 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 86 places, 240 transitions, 1958 flow [2024-06-27 17:02:19,513 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 85 places, 240 transitions, 1936 flow, removed 11 selfloop flow, removed 1 redundant places. [2024-06-27 17:02:19,518 INFO L231 Difference]: Finished difference. Result has 102 places, 145 transitions, 1431 flow [2024-06-27 17:02:19,518 INFO L264 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=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=1431, PETRI_PLACES=102, PETRI_TRANSITIONS=145} [2024-06-27 17:02:19,520 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 79 predicate places. [2024-06-27 17:02:19,520 INFO L495 AbstractCegarLoop]: Abstraction has has 102 places, 145 transitions, 1431 flow [2024-06-27 17:02:19,520 INFO L496 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) [2024-06-27 17:02:19,520 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:02:19,521 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:02:19,538 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2024-06-27 17:02:19,738 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2024-06-27 17:02:19,739 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-06-27 17:02:19,739 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:02:19,739 INFO L85 PathProgramCache]: Analyzing trace with hash 253928195, now seen corresponding path program 3 times [2024-06-27 17:02:19,739 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:02:19,740 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1762505569] [2024-06-27 17:02:19,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:02:19,740 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:02:19,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:02:19,983 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:02:19,983 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:02:19,984 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1762505569] [2024-06-27 17:02:19,984 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1762505569] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 17:02:19,984 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1982171124] [2024-06-27 17:02:19,984 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-06-27 17:02:19,984 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 17:02:19,985 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 17:02:19,986 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-06-27 17:02:20,004 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-06-27 17:02:20,033 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-06-27 17:02:20,034 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 17:02:20,035 INFO L262 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 12 conjunts are in the unsatisfiable core [2024-06-27 17:02:20,036 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 17:02:20,208 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:02:20,208 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 17:02:20,597 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:02:20,597 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1982171124] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 17:02:20,597 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 17:02:20,597 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 23 [2024-06-27 17:02:20,600 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1443619979] [2024-06-27 17:02:20,600 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 17:02:20,600 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2024-06-27 17:02:20,601 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:02:20,602 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2024-06-27 17:02:20,602 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=435, Unknown=0, NotChecked=0, Total=552 [2024-06-27 17:02:20,610 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 21 [2024-06-27 17:02:20,610 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 102 places, 145 transitions, 1431 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) [2024-06-27 17:02:20,610 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:02:20,611 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 21 [2024-06-27 17:02:20,611 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:02:21,584 INFO L124 PetriNetUnfolderBase]: 603/1072 cut-off events. [2024-06-27 17:02:21,585 INFO L125 PetriNetUnfolderBase]: For 5793/5793 co-relation queries the response was YES. [2024-06-27 17:02:21,591 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5843 conditions, 1072 events. 603/1072 cut-off events. For 5793/5793 co-relation queries the response was YES. Maximal size of possible extension queue 78. Compared 5095 event pairs, 27 based on Foata normal form. 2/1074 useless extension candidates. Maximal degree in co-relation 5770. Up to 304 conditions per place. [2024-06-27 17:02:21,597 INFO L140 encePairwiseOnDemand]: 9/21 looper letters, 105 selfloop transitions, 139 changer transitions 21/266 dead transitions. [2024-06-27 17:02:21,598 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 125 places, 266 transitions, 2879 flow [2024-06-27 17:02:21,598 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2024-06-27 17:02:21,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2024-06-27 17:02:21,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 254 transitions. [2024-06-27 17:02:21,600 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43197278911564624 [2024-06-27 17:02:21,600 INFO L175 Difference]: Start difference. First operand has 102 places, 145 transitions, 1431 flow. Second operand 28 states and 254 transitions. [2024-06-27 17:02:21,600 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 125 places, 266 transitions, 2879 flow [2024-06-27 17:02:21,638 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 120 places, 266 transitions, 2772 flow, removed 41 selfloop flow, removed 5 redundant places. [2024-06-27 17:02:21,643 INFO L231 Difference]: Finished difference. Result has 134 places, 177 transitions, 2184 flow [2024-06-27 17:02:21,644 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=1363, PETRI_DIFFERENCE_MINUEND_PLACES=93, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=145, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=107, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=28, PETRI_FLOW=2184, PETRI_PLACES=134, PETRI_TRANSITIONS=177} [2024-06-27 17:02:21,644 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 111 predicate places. [2024-06-27 17:02:21,644 INFO L495 AbstractCegarLoop]: Abstraction has has 134 places, 177 transitions, 2184 flow [2024-06-27 17:02:21,645 INFO L496 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) [2024-06-27 17:02:21,645 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:02:21,645 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:02:21,660 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2024-06-27 17:02:21,859 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 17:02:21,860 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-06-27 17:02:21,860 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:02:21,860 INFO L85 PathProgramCache]: Analyzing trace with hash 1106845699, now seen corresponding path program 4 times [2024-06-27 17:02:21,861 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:02:21,861 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [197858307] [2024-06-27 17:02:21,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:02:21,861 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:02:21,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:02:22,079 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:02:22,080 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:02:22,080 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [197858307] [2024-06-27 17:02:22,080 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [197858307] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 17:02:22,081 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [550620685] [2024-06-27 17:02:22,081 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-06-27 17:02:22,081 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 17:02:22,081 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 17:02:22,082 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-06-27 17:02:22,091 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-06-27 17:02:22,132 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-06-27 17:02:22,133 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 17:02:22,134 INFO L262 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 14 conjunts are in the unsatisfiable core [2024-06-27 17:02:22,135 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 17:02:22,300 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:02:22,300 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 17:02:22,675 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:02:22,680 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [550620685] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 17:02:22,680 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 17:02:22,680 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 10] total 23 [2024-06-27 17:02:22,680 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [143153839] [2024-06-27 17:02:22,681 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 17:02:22,681 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2024-06-27 17:02:22,681 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:02:22,682 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2024-06-27 17:02:22,682 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=427, Unknown=0, NotChecked=0, Total=552 [2024-06-27 17:02:22,692 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 21 [2024-06-27 17:02:22,692 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 134 places, 177 transitions, 2184 flow. Second operand has 24 states, 24 states have (on average 4.708333333333333) internal successors, (113), 24 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:02:22,692 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:02:22,692 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 21 [2024-06-27 17:02:22,693 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:02:24,143 INFO L124 PetriNetUnfolderBase]: 982/1749 cut-off events. [2024-06-27 17:02:24,144 INFO L125 PetriNetUnfolderBase]: For 14658/14658 co-relation queries the response was YES. [2024-06-27 17:02:24,152 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11089 conditions, 1749 events. 982/1749 cut-off events. For 14658/14658 co-relation queries the response was YES. Maximal size of possible extension queue 119. Compared 9256 event pairs, 28 based on Foata normal form. 4/1753 useless extension candidates. Maximal degree in co-relation 10972. Up to 511 conditions per place. [2024-06-27 17:02:24,163 INFO L140 encePairwiseOnDemand]: 9/21 looper letters, 183 selfloop transitions, 250 changer transitions 19/453 dead transitions. [2024-06-27 17:02:24,163 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 169 places, 453 transitions, 6004 flow [2024-06-27 17:02:24,163 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2024-06-27 17:02:24,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2024-06-27 17:02:24,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 357 transitions. [2024-06-27 17:02:24,165 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4358974358974359 [2024-06-27 17:02:24,166 INFO L175 Difference]: Start difference. First operand has 134 places, 177 transitions, 2184 flow. Second operand 39 states and 357 transitions. [2024-06-27 17:02:24,166 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 169 places, 453 transitions, 6004 flow [2024-06-27 17:02:24,257 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 154 places, 453 transitions, 5524 flow, removed 105 selfloop flow, removed 15 redundant places. [2024-06-27 17:02:24,264 INFO L231 Difference]: Finished difference. Result has 172 places, 324 transitions, 4614 flow [2024-06-27 17:02:24,265 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=1915, PETRI_DIFFERENCE_MINUEND_PLACES=116, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=177, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=130, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=39, PETRI_FLOW=4614, PETRI_PLACES=172, PETRI_TRANSITIONS=324} [2024-06-27 17:02:24,265 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 149 predicate places. [2024-06-27 17:02:24,265 INFO L495 AbstractCegarLoop]: Abstraction has has 172 places, 324 transitions, 4614 flow [2024-06-27 17:02:24,266 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 4.708333333333333) internal successors, (113), 24 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:02:24,266 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:02:24,266 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:02:24,283 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2024-06-27 17:02:24,481 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 17:02:24,481 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-06-27 17:02:24,481 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:02:24,482 INFO L85 PathProgramCache]: Analyzing trace with hash -1094682093, now seen corresponding path program 5 times [2024-06-27 17:02:24,482 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:02:24,482 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1932000059] [2024-06-27 17:02:24,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:02:24,482 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:02:24,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:02:24,716 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:02:24,716 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:02:24,716 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1932000059] [2024-06-27 17:02:24,716 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1932000059] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 17:02:24,717 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1385120539] [2024-06-27 17:02:24,717 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-06-27 17:02:24,717 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 17:02:24,717 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 17:02:24,720 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-06-27 17:02:24,728 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-06-27 17:02:24,772 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-06-27 17:02:24,772 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 17:02:24,773 INFO L262 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 14 conjunts are in the unsatisfiable core [2024-06-27 17:02:24,774 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 17:02:24,956 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:02:24,956 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 17:02:25,321 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:02:25,322 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1385120539] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 17:02:25,322 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 17:02:25,322 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 10] total 23 [2024-06-27 17:02:25,322 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2079728033] [2024-06-27 17:02:25,323 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 17:02:25,323 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2024-06-27 17:02:25,323 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:02:25,324 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2024-06-27 17:02:25,324 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=420, Unknown=0, NotChecked=0, Total=552 [2024-06-27 17:02:25,351 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 21 [2024-06-27 17:02:25,353 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 172 places, 324 transitions, 4614 flow. Second operand has 24 states, 24 states have (on average 4.75) internal successors, (114), 24 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:02:25,353 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:02:25,353 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 21 [2024-06-27 17:02:25,353 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:02:26,669 INFO L124 PetriNetUnfolderBase]: 1104/1944 cut-off events. [2024-06-27 17:02:26,670 INFO L125 PetriNetUnfolderBase]: For 20936/20936 co-relation queries the response was YES. [2024-06-27 17:02:26,683 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13794 conditions, 1944 events. 1104/1944 cut-off events. For 20936/20936 co-relation queries the response was YES. Maximal size of possible extension queue 135. Compared 10435 event pairs, 41 based on Foata normal form. 2/1946 useless extension candidates. Maximal degree in co-relation 13641. Up to 751 conditions per place. [2024-06-27 17:02:26,694 INFO L140 encePairwiseOnDemand]: 9/21 looper letters, 204 selfloop transitions, 256 changer transitions 24/485 dead transitions. [2024-06-27 17:02:26,694 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 203 places, 485 transitions, 7420 flow [2024-06-27 17:02:26,694 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2024-06-27 17:02:26,695 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2024-06-27 17:02:26,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 305 transitions. [2024-06-27 17:02:26,696 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41496598639455784 [2024-06-27 17:02:26,696 INFO L175 Difference]: Start difference. First operand has 172 places, 324 transitions, 4614 flow. Second operand 35 states and 305 transitions. [2024-06-27 17:02:26,697 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 203 places, 485 transitions, 7420 flow [2024-06-27 17:02:26,824 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 189 places, 485 transitions, 6431 flow, removed 393 selfloop flow, removed 14 redundant places. [2024-06-27 17:02:26,833 INFO L231 Difference]: Finished difference. Result has 203 places, 376 transitions, 5574 flow [2024-06-27 17:02:26,833 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=3989, PETRI_DIFFERENCE_MINUEND_PLACES=155, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=324, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=203, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=98, PETRI_DIFFERENCE_SUBTRAHEND_STATES=35, PETRI_FLOW=5574, PETRI_PLACES=203, PETRI_TRANSITIONS=376} [2024-06-27 17:02:26,834 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 180 predicate places. [2024-06-27 17:02:26,834 INFO L495 AbstractCegarLoop]: Abstraction has has 203 places, 376 transitions, 5574 flow [2024-06-27 17:02:26,835 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 4.75) internal successors, (114), 24 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:02:26,835 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:02:26,835 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:02:26,847 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2024-06-27 17:02:27,040 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 17:02:27,041 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-06-27 17:02:27,042 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:02:27,042 INFO L85 PathProgramCache]: Analyzing trace with hash 691254019, now seen corresponding path program 6 times [2024-06-27 17:02:27,042 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:02:27,043 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [794722369] [2024-06-27 17:02:27,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:02:27,043 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:02:27,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:02:27,223 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:02:27,223 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:02:27,224 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [794722369] [2024-06-27 17:02:27,224 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [794722369] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 17:02:27,224 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1149574034] [2024-06-27 17:02:27,224 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-06-27 17:02:27,224 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 17:02:27,224 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 17:02:27,226 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-06-27 17:02:27,227 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-06-27 17:02:27,274 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2024-06-27 17:02:27,274 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 17:02:27,275 INFO L262 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 12 conjunts are in the unsatisfiable core [2024-06-27 17:02:27,276 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 17:02:27,460 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:02:27,460 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 17:02:27,941 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:02:27,942 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1149574034] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 17:02:27,942 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 17:02:27,942 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 23 [2024-06-27 17:02:27,942 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [299770498] [2024-06-27 17:02:27,943 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 17:02:27,943 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2024-06-27 17:02:27,944 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:02:27,944 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2024-06-27 17:02:27,945 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=433, Unknown=0, NotChecked=0, Total=552 [2024-06-27 17:02:27,966 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 21 [2024-06-27 17:02:27,967 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 203 places, 376 transitions, 5574 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) [2024-06-27 17:02:27,967 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:02:27,967 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 21 [2024-06-27 17:02:27,967 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:02:28,998 INFO L124 PetriNetUnfolderBase]: 1225/2178 cut-off events. [2024-06-27 17:02:28,998 INFO L125 PetriNetUnfolderBase]: For 20738/20738 co-relation queries the response was YES. [2024-06-27 17:02:29,007 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15330 conditions, 2178 events. 1225/2178 cut-off events. For 20738/20738 co-relation queries the response was YES. Maximal size of possible extension queue 156. Compared 12176 event pairs, 36 based on Foata normal form. 13/2191 useless extension candidates. Maximal degree in co-relation 15168. Up to 974 conditions per place. [2024-06-27 17:02:29,021 INFO L140 encePairwiseOnDemand]: 9/21 looper letters, 220 selfloop transitions, 276 changer transitions 30/527 dead transitions. [2024-06-27 17:02:29,022 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 220 places, 527 transitions, 8436 flow [2024-06-27 17:02:29,022 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2024-06-27 17:02:29,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2024-06-27 17:02:29,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 205 transitions. [2024-06-27 17:02:29,023 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4244306418219462 [2024-06-27 17:02:29,023 INFO L175 Difference]: Start difference. First operand has 203 places, 376 transitions, 5574 flow. Second operand 23 states and 205 transitions. [2024-06-27 17:02:29,023 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 220 places, 527 transitions, 8436 flow [2024-06-27 17:02:29,162 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 210 places, 527 transitions, 8230 flow, removed 41 selfloop flow, removed 10 redundant places. [2024-06-27 17:02:29,172 INFO L231 Difference]: Finished difference. Result has 221 places, 442 transitions, 7609 flow [2024-06-27 17:02:29,172 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=5391, PETRI_DIFFERENCE_MINUEND_PLACES=188, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=374, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=205, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=129, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=7609, PETRI_PLACES=221, PETRI_TRANSITIONS=442} [2024-06-27 17:02:29,173 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 198 predicate places. [2024-06-27 17:02:29,173 INFO L495 AbstractCegarLoop]: Abstraction has has 221 places, 442 transitions, 7609 flow [2024-06-27 17:02:29,174 INFO L496 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) [2024-06-27 17:02:29,174 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:02:29,174 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:02:29,188 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2024-06-27 17:02:29,387 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 17:02:29,388 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-06-27 17:02:29,388 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:02:29,388 INFO L85 PathProgramCache]: Analyzing trace with hash 1544171523, now seen corresponding path program 7 times [2024-06-27 17:02:29,388 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:02:29,389 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2108961556] [2024-06-27 17:02:29,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:02:29,389 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:02:29,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:02:29,569 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:02:29,569 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:02:29,569 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2108961556] [2024-06-27 17:02:29,569 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2108961556] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 17:02:29,570 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [732300958] [2024-06-27 17:02:29,570 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-06-27 17:02:29,570 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 17:02:29,570 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 17:02:29,571 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-06-27 17:02:29,571 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-06-27 17:02:29,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:02:29,608 INFO L262 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 12 conjunts are in the unsatisfiable core [2024-06-27 17:02:29,609 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 17:02:29,776 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:02:29,776 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 17:02:30,115 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:02:30,115 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [732300958] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 17:02:30,115 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 17:02:30,115 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 23 [2024-06-27 17:02:30,116 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1851887607] [2024-06-27 17:02:30,116 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 17:02:30,116 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2024-06-27 17:02:30,117 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:02:30,117 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2024-06-27 17:02:30,117 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=418, Unknown=0, NotChecked=0, Total=552 [2024-06-27 17:02:30,127 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 21 [2024-06-27 17:02:30,127 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 221 places, 442 transitions, 7609 flow. Second operand has 24 states, 24 states have (on average 4.791666666666667) internal successors, (115), 24 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:02:30,127 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:02:30,127 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 21 [2024-06-27 17:02:30,128 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:02:31,164 INFO L124 PetriNetUnfolderBase]: 1291/2280 cut-off events. [2024-06-27 17:02:31,164 INFO L125 PetriNetUnfolderBase]: For 28931/28931 co-relation queries the response was YES. [2024-06-27 17:02:31,174 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17865 conditions, 2280 events. 1291/2280 cut-off events. For 28931/28931 co-relation queries the response was YES. Maximal size of possible extension queue 150. Compared 12712 event pairs, 27 based on Foata normal form. 2/2282 useless extension candidates. Maximal degree in co-relation 17694. Up to 1028 conditions per place. [2024-06-27 17:02:31,186 INFO L140 encePairwiseOnDemand]: 9/21 looper letters, 232 selfloop transitions, 335 changer transitions 21/589 dead transitions. [2024-06-27 17:02:31,186 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 244 places, 589 transitions, 10730 flow [2024-06-27 17:02:31,186 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2024-06-27 17:02:31,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2024-06-27 17:02:31,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 223 transitions. [2024-06-27 17:02:31,188 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3932980599647266 [2024-06-27 17:02:31,188 INFO L175 Difference]: Start difference. First operand has 221 places, 442 transitions, 7609 flow. Second operand 27 states and 223 transitions. [2024-06-27 17:02:31,188 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 244 places, 589 transitions, 10730 flow [2024-06-27 17:02:31,435 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 236 places, 589 transitions, 10506 flow, removed 87 selfloop flow, removed 8 redundant places. [2024-06-27 17:02:31,443 INFO L231 Difference]: Finished difference. Result has 248 places, 516 transitions, 10031 flow [2024-06-27 17:02:31,444 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=7446, PETRI_DIFFERENCE_MINUEND_PLACES=210, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=442, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=263, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=132, PETRI_DIFFERENCE_SUBTRAHEND_STATES=27, PETRI_FLOW=10031, PETRI_PLACES=248, PETRI_TRANSITIONS=516} [2024-06-27 17:02:31,444 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 225 predicate places. [2024-06-27 17:02:31,445 INFO L495 AbstractCegarLoop]: Abstraction has has 248 places, 516 transitions, 10031 flow [2024-06-27 17:02:31,445 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 4.791666666666667) internal successors, (115), 24 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:02:31,445 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:02:31,445 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:02:31,457 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2024-06-27 17:02:31,646 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 17:02:31,646 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-06-27 17:02:31,647 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:02:31,647 INFO L85 PathProgramCache]: Analyzing trace with hash 1247042307, now seen corresponding path program 8 times [2024-06-27 17:02:31,647 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:02:31,647 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [974759910] [2024-06-27 17:02:31,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:02:31,647 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:02:31,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:02:31,833 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:02:31,833 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:02:31,834 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [974759910] [2024-06-27 17:02:31,834 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [974759910] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 17:02:31,834 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [789302556] [2024-06-27 17:02:31,834 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-06-27 17:02:31,834 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 17:02:31,834 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 17:02:31,837 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-06-27 17:02:31,862 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-06-27 17:02:31,887 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-06-27 17:02:31,888 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 17:02:31,889 INFO L262 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 12 conjunts are in the unsatisfiable core [2024-06-27 17:02:31,891 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 17:02:32,061 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:02:32,061 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 17:02:32,389 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:02:32,389 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [789302556] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 17:02:32,389 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 17:02:32,390 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 23 [2024-06-27 17:02:32,390 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [811397832] [2024-06-27 17:02:32,390 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 17:02:32,391 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2024-06-27 17:02:32,392 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:02:32,393 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2024-06-27 17:02:32,393 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=428, Unknown=0, NotChecked=0, Total=552 [2024-06-27 17:02:32,404 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 21 [2024-06-27 17:02:32,408 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 248 places, 516 transitions, 10031 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) [2024-06-27 17:02:32,408 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:02:32,408 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 21 [2024-06-27 17:02:32,408 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:02:33,374 INFO L124 PetriNetUnfolderBase]: 1280/2246 cut-off events. [2024-06-27 17:02:33,374 INFO L125 PetriNetUnfolderBase]: For 33603/33603 co-relation queries the response was YES. [2024-06-27 17:02:33,389 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19632 conditions, 2246 events. 1280/2246 cut-off events. For 33603/33603 co-relation queries the response was YES. Maximal size of possible extension queue 144. Compared 12253 event pairs, 31 based on Foata normal form. 7/2253 useless extension candidates. Maximal degree in co-relation 19482. Up to 1012 conditions per place. [2024-06-27 17:02:33,403 INFO L140 encePairwiseOnDemand]: 9/21 looper letters, 259 selfloop transitions, 313 changer transitions 26/599 dead transitions. [2024-06-27 17:02:33,404 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 264 places, 599 transitions, 12291 flow [2024-06-27 17:02:33,404 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2024-06-27 17:02:33,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2024-06-27 17:02:33,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 191 transitions. [2024-06-27 17:02:33,406 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4331065759637188 [2024-06-27 17:02:33,406 INFO L175 Difference]: Start difference. First operand has 248 places, 516 transitions, 10031 flow. Second operand 21 states and 191 transitions. [2024-06-27 17:02:33,406 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 264 places, 599 transitions, 12291 flow [2024-06-27 17:02:33,896 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 255 places, 599 transitions, 12043 flow, removed 102 selfloop flow, removed 9 redundant places. [2024-06-27 17:02:33,906 INFO L231 Difference]: Finished difference. Result has 265 places, 529 transitions, 11431 flow [2024-06-27 17:02:33,907 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=9786, PETRI_DIFFERENCE_MINUEND_PLACES=235, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=514, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=288, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=214, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=11431, PETRI_PLACES=265, PETRI_TRANSITIONS=529} [2024-06-27 17:02:33,907 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 242 predicate places. [2024-06-27 17:02:33,908 INFO L495 AbstractCegarLoop]: Abstraction has has 265 places, 529 transitions, 11431 flow [2024-06-27 17:02:33,908 INFO L496 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) [2024-06-27 17:02:33,908 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:02:33,908 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:02:33,921 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2024-06-27 17:02:34,115 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2024-06-27 17:02:34,116 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-06-27 17:02:34,116 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:02:34,116 INFO L85 PathProgramCache]: Analyzing trace with hash 2099959811, now seen corresponding path program 9 times [2024-06-27 17:02:34,116 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:02:34,117 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1990375281] [2024-06-27 17:02:34,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:02:34,117 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:02:34,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:02:34,301 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:02:34,301 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:02:34,301 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1990375281] [2024-06-27 17:02:34,301 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1990375281] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 17:02:34,302 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [529151140] [2024-06-27 17:02:34,302 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-06-27 17:02:34,302 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 17:02:34,302 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 17:02:34,303 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-06-27 17:02:34,328 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-06-27 17:02:34,350 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-06-27 17:02:34,350 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 17:02:34,351 INFO L262 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 12 conjunts are in the unsatisfiable core [2024-06-27 17:02:34,352 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 17:02:34,505 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:02:34,505 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 17:02:34,813 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:02:34,813 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [529151140] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 17:02:34,813 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 17:02:34,813 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 23 [2024-06-27 17:02:34,814 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1200361919] [2024-06-27 17:02:34,814 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 17:02:34,815 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2024-06-27 17:02:34,817 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:02:34,817 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2024-06-27 17:02:34,817 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=135, Invalid=417, Unknown=0, NotChecked=0, Total=552 [2024-06-27 17:02:34,832 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 21 [2024-06-27 17:02:34,833 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 265 places, 529 transitions, 11431 flow. Second operand has 24 states, 24 states have (on average 4.791666666666667) internal successors, (115), 24 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:02:34,833 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:02:34,833 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 21 [2024-06-27 17:02:34,833 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:02:36,284 INFO L124 PetriNetUnfolderBase]: 1306/2297 cut-off events. [2024-06-27 17:02:36,285 INFO L125 PetriNetUnfolderBase]: For 40668/40668 co-relation queries the response was YES. [2024-06-27 17:02:36,294 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21639 conditions, 2297 events. 1306/2297 cut-off events. For 40668/40668 co-relation queries the response was YES. Maximal size of possible extension queue 145. Compared 12621 event pairs, 28 based on Foata normal form. 2/2299 useless extension candidates. Maximal degree in co-relation 21463. Up to 1024 conditions per place. [2024-06-27 17:02:36,306 INFO L140 encePairwiseOnDemand]: 9/21 looper letters, 261 selfloop transitions, 378 changer transitions 18/658 dead transitions. [2024-06-27 17:02:36,306 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 291 places, 658 transitions, 14505 flow [2024-06-27 17:02:36,307 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2024-06-27 17:02:36,307 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2024-06-27 17:02:36,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 271 transitions. [2024-06-27 17:02:36,309 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39105339105339104 [2024-06-27 17:02:36,309 INFO L175 Difference]: Start difference. First operand has 265 places, 529 transitions, 11431 flow. Second operand 33 states and 271 transitions. [2024-06-27 17:02:36,309 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 291 places, 658 transitions, 14505 flow [2024-06-27 17:02:36,689 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 278 places, 658 transitions, 14324 flow, removed 41 selfloop flow, removed 13 redundant places. [2024-06-27 17:02:36,699 INFO L231 Difference]: Finished difference. Result has 292 places, 585 transitions, 13921 flow [2024-06-27 17:02:36,700 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=11294, PETRI_DIFFERENCE_MINUEND_PLACES=246, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=529, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=323, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=172, PETRI_DIFFERENCE_SUBTRAHEND_STATES=33, PETRI_FLOW=13921, PETRI_PLACES=292, PETRI_TRANSITIONS=585} [2024-06-27 17:02:36,700 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 269 predicate places. [2024-06-27 17:02:36,701 INFO L495 AbstractCegarLoop]: Abstraction has has 292 places, 585 transitions, 13921 flow [2024-06-27 17:02:36,701 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 4.791666666666667) internal successors, (115), 24 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:02:36,701 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:02:36,701 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:02:36,711 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2024-06-27 17:02:36,901 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 17:02:36,902 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-06-27 17:02:36,902 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:02:36,902 INFO L85 PathProgramCache]: Analyzing trace with hash -492124575, now seen corresponding path program 10 times [2024-06-27 17:02:36,902 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:02:36,903 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1826266198] [2024-06-27 17:02:36,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:02:36,903 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:02:36,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:02:37,100 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:02:37,101 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:02:37,101 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1826266198] [2024-06-27 17:02:37,101 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1826266198] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 17:02:37,101 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [456748073] [2024-06-27 17:02:37,101 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-06-27 17:02:37,101 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 17:02:37,102 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 17:02:37,103 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-06-27 17:02:37,127 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-06-27 17:02:37,157 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-06-27 17:02:37,157 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 17:02:37,158 INFO L262 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 12 conjunts are in the unsatisfiable core [2024-06-27 17:02:37,160 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 17:02:37,372 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:02:37,373 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 17:02:37,738 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:02:37,738 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [456748073] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 17:02:37,738 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 17:02:37,738 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 10] total 25 [2024-06-27 17:02:37,738 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1212226979] [2024-06-27 17:02:37,738 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 17:02:37,739 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2024-06-27 17:02:37,739 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:02:37,739 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2024-06-27 17:02:37,740 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=149, Invalid=501, Unknown=0, NotChecked=0, Total=650 [2024-06-27 17:02:37,752 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 21 [2024-06-27 17:02:37,752 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 292 places, 585 transitions, 13921 flow. Second operand has 26 states, 26 states have (on average 4.846153846153846) internal successors, (126), 26 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:02:37,752 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:02:37,752 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 21 [2024-06-27 17:02:37,752 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:02:38,822 INFO L124 PetriNetUnfolderBase]: 1322/2324 cut-off events. [2024-06-27 17:02:38,822 INFO L125 PetriNetUnfolderBase]: For 49267/49267 co-relation queries the response was YES. [2024-06-27 17:02:38,836 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23858 conditions, 2324 events. 1322/2324 cut-off events. For 49267/49267 co-relation queries the response was YES. Maximal size of possible extension queue 148. Compared 12756 event pairs, 18 based on Foata normal form. 1/2325 useless extension candidates. Maximal degree in co-relation 23664. Up to 1071 conditions per place. [2024-06-27 17:02:38,852 INFO L140 encePairwiseOnDemand]: 10/21 looper letters, 210 selfloop transitions, 443 changer transitions 5/659 dead transitions. [2024-06-27 17:02:38,852 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 310 places, 659 transitions, 16265 flow [2024-06-27 17:02:38,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2024-06-27 17:02:38,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2024-06-27 17:02:38,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 185 transitions. [2024-06-27 17:02:38,854 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3830227743271222 [2024-06-27 17:02:38,854 INFO L175 Difference]: Start difference. First operand has 292 places, 585 transitions, 13921 flow. Second operand 23 states and 185 transitions. [2024-06-27 17:02:38,855 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 310 places, 659 transitions, 16265 flow [2024-06-27 17:02:39,351 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 296 places, 659 transitions, 15873 flow, removed 83 selfloop flow, removed 14 redundant places. [2024-06-27 17:02:39,363 INFO L231 Difference]: Finished difference. Result has 298 places, 604 transitions, 15119 flow [2024-06-27 17:02:39,363 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=13541, PETRI_DIFFERENCE_MINUEND_PLACES=274, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=585, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=423, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=160, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=15119, PETRI_PLACES=298, PETRI_TRANSITIONS=604} [2024-06-27 17:02:39,364 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 275 predicate places. [2024-06-27 17:02:39,364 INFO L495 AbstractCegarLoop]: Abstraction has has 298 places, 604 transitions, 15119 flow [2024-06-27 17:02:39,364 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 4.846153846153846) internal successors, (126), 26 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:02:39,364 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:02:39,365 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:02:39,400 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2024-06-27 17:02:39,565 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2024-06-27 17:02:39,565 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-06-27 17:02:39,566 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:02:39,566 INFO L85 PathProgramCache]: Analyzing trace with hash -185650157, now seen corresponding path program 11 times [2024-06-27 17:02:39,566 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:02:39,566 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1843581116] [2024-06-27 17:02:39,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:02:39,566 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:02:39,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:02:39,812 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:02:39,813 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:02:39,813 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1843581116] [2024-06-27 17:02:39,813 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1843581116] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 17:02:39,813 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [96194125] [2024-06-27 17:02:39,813 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-06-27 17:02:39,813 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 17:02:39,814 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 17:02:39,815 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-06-27 17:02:39,853 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-06-27 17:02:39,877 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2024-06-27 17:02:39,877 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 17:02:39,878 INFO L262 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 18 conjunts are in the unsatisfiable core [2024-06-27 17:02:39,880 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 17:02:40,102 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:02:40,102 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 17:02:40,575 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:02:40,575 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [96194125] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 17:02:40,576 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 17:02:40,576 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 33 [2024-06-27 17:02:40,576 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1300730622] [2024-06-27 17:02:40,576 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 17:02:40,576 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2024-06-27 17:02:40,577 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:02:40,577 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2024-06-27 17:02:40,578 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=164, Invalid=958, Unknown=0, NotChecked=0, Total=1122 [2024-06-27 17:02:40,589 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 21 [2024-06-27 17:02:40,590 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 298 places, 604 transitions, 15119 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) [2024-06-27 17:02:40,590 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:02:40,590 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 21 [2024-06-27 17:02:40,590 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:02:43,449 INFO L124 PetriNetUnfolderBase]: 1822/3287 cut-off events. [2024-06-27 17:02:43,449 INFO L125 PetriNetUnfolderBase]: For 79679/79679 co-relation queries the response was YES. [2024-06-27 17:02:43,466 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35477 conditions, 3287 events. 1822/3287 cut-off events. For 79679/79679 co-relation queries the response was YES. Maximal size of possible extension queue 160. Compared 19556 event pairs, 63 based on Foata normal form. 5/3292 useless extension candidates. Maximal degree in co-relation 35247. Up to 1050 conditions per place. [2024-06-27 17:02:43,482 INFO L140 encePairwiseOnDemand]: 10/21 looper letters, 403 selfloop transitions, 557 changer transitions 29/990 dead transitions. [2024-06-27 17:02:43,482 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 357 places, 990 transitions, 24616 flow [2024-06-27 17:02:43,483 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2024-06-27 17:02:43,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2024-06-27 17:02:43,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 549 transitions. [2024-06-27 17:02:43,485 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41496598639455784 [2024-06-27 17:02:43,485 INFO L175 Difference]: Start difference. First operand has 298 places, 604 transitions, 15119 flow. Second operand 63 states and 549 transitions. [2024-06-27 17:02:43,485 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 357 places, 990 transitions, 24616 flow [2024-06-27 17:02:44,167 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 340 places, 990 transitions, 24396 flow, removed 49 selfloop flow, removed 17 redundant places. [2024-06-27 17:02:44,185 INFO L231 Difference]: Finished difference. Result has 363 places, 780 transitions, 21984 flow [2024-06-27 17:02:44,185 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=14919, PETRI_DIFFERENCE_MINUEND_PLACES=278, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=604, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=405, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=176, PETRI_DIFFERENCE_SUBTRAHEND_STATES=63, PETRI_FLOW=21984, PETRI_PLACES=363, PETRI_TRANSITIONS=780} [2024-06-27 17:02:44,186 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 340 predicate places. [2024-06-27 17:02:44,186 INFO L495 AbstractCegarLoop]: Abstraction has has 363 places, 780 transitions, 21984 flow [2024-06-27 17:02:44,186 INFO L496 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) [2024-06-27 17:02:44,186 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:02:44,186 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:02:44,198 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2024-06-27 17:02:44,387 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2024-06-27 17:02:44,387 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-06-27 17:02:44,387 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:02:44,387 INFO L85 PathProgramCache]: Analyzing trace with hash 331302923, now seen corresponding path program 12 times [2024-06-27 17:02:44,388 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:02:44,388 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1938978311] [2024-06-27 17:02:44,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:02:44,388 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:02:44,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:02:44,609 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:02:44,609 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:02:44,610 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1938978311] [2024-06-27 17:02:44,610 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1938978311] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 17:02:44,610 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [430797803] [2024-06-27 17:02:44,610 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-06-27 17:02:44,610 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 17:02:44,610 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 17:02:44,612 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-06-27 17:02:44,627 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-06-27 17:02:44,653 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2024-06-27 17:02:44,653 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 17:02:44,653 INFO L262 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 18 conjunts are in the unsatisfiable core [2024-06-27 17:02:44,654 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 17:02:44,891 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:02:44,891 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 17:02:45,318 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:02:45,319 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [430797803] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 17:02:45,319 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 17:02:45,319 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 33 [2024-06-27 17:02:45,319 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [118836774] [2024-06-27 17:02:45,319 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 17:02:45,319 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2024-06-27 17:02:45,320 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:02:45,320 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2024-06-27 17:02:45,320 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=161, Invalid=961, Unknown=0, NotChecked=0, Total=1122 [2024-06-27 17:02:45,337 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 21 [2024-06-27 17:02:45,337 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 363 places, 780 transitions, 21984 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) [2024-06-27 17:02:45,337 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:02:45,337 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 21 [2024-06-27 17:02:45,337 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:02:49,210 INFO L124 PetriNetUnfolderBase]: 2049/3687 cut-off events. [2024-06-27 17:02:49,210 INFO L125 PetriNetUnfolderBase]: For 113661/113661 co-relation queries the response was YES. [2024-06-27 17:02:49,232 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43869 conditions, 3687 events. 2049/3687 cut-off events. For 113661/113661 co-relation queries the response was YES. Maximal size of possible extension queue 175. Compared 22530 event pairs, 41 based on Foata normal form. 5/3692 useless extension candidates. Maximal degree in co-relation 43755. Up to 1157 conditions per place. [2024-06-27 17:02:49,248 INFO L140 encePairwiseOnDemand]: 9/21 looper letters, 375 selfloop transitions, 708 changer transitions 29/1113 dead transitions. [2024-06-27 17:02:49,248 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 437 places, 1113 transitions, 30503 flow [2024-06-27 17:02:49,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2024-06-27 17:02:49,256 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2024-06-27 17:02:49,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 660 transitions. [2024-06-27 17:02:49,264 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39783001808318263 [2024-06-27 17:02:49,264 INFO L175 Difference]: Start difference. First operand has 363 places, 780 transitions, 21984 flow. Second operand 79 states and 660 transitions. [2024-06-27 17:02:49,264 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 437 places, 1113 transitions, 30503 flow [2024-06-27 17:02:50,477 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 424 places, 1113 transitions, 29923 flow, removed 184 selfloop flow, removed 13 redundant places. [2024-06-27 17:02:50,496 INFO L231 Difference]: Finished difference. Result has 445 places, 910 transitions, 27628 flow [2024-06-27 17:02:50,497 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=21560, PETRI_DIFFERENCE_MINUEND_PLACES=346, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=780, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=586, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=182, PETRI_DIFFERENCE_SUBTRAHEND_STATES=79, PETRI_FLOW=27628, PETRI_PLACES=445, PETRI_TRANSITIONS=910} [2024-06-27 17:02:50,497 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 422 predicate places. [2024-06-27 17:02:50,497 INFO L495 AbstractCegarLoop]: Abstraction has has 445 places, 910 transitions, 27628 flow [2024-06-27 17:02:50,498 INFO L496 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) [2024-06-27 17:02:50,498 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:02:50,498 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:02:50,509 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2024-06-27 17:02:50,698 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2024-06-27 17:02:50,699 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-06-27 17:02:50,699 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:02:50,699 INFO L85 PathProgramCache]: Analyzing trace with hash 171951597, now seen corresponding path program 13 times [2024-06-27 17:02:50,699 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:02:50,699 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [986625545] [2024-06-27 17:02:50,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:02:50,700 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:02:50,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:02:50,893 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:02:50,894 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:02:50,894 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [986625545] [2024-06-27 17:02:50,894 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [986625545] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 17:02:50,894 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1935706843] [2024-06-27 17:02:50,894 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-06-27 17:02:50,895 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 17:02:50,895 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 17:02:50,896 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-06-27 17:02:50,896 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-06-27 17:02:50,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:02:50,931 INFO L262 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 18 conjunts are in the unsatisfiable core [2024-06-27 17:02:50,932 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 17:02:51,182 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:02:51,182 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 17:02:51,601 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:02:51,601 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1935706843] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 17:02:51,601 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 17:02:51,601 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 33 [2024-06-27 17:02:51,602 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [447770902] [2024-06-27 17:02:51,602 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 17:02:51,602 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2024-06-27 17:02:51,602 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:02:51,603 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2024-06-27 17:02:51,603 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=168, Invalid=954, Unknown=0, NotChecked=0, Total=1122 [2024-06-27 17:02:51,617 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 21 [2024-06-27 17:02:51,617 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 445 places, 910 transitions, 27628 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) [2024-06-27 17:02:51,617 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:02:51,617 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 21 [2024-06-27 17:02:51,617 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:02:57,053 INFO L124 PetriNetUnfolderBase]: 2324/4200 cut-off events. [2024-06-27 17:02:57,053 INFO L125 PetriNetUnfolderBase]: For 153926/153926 co-relation queries the response was YES. [2024-06-27 17:02:57,087 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53253 conditions, 4200 events. 2324/4200 cut-off events. For 153926/153926 co-relation queries the response was YES. Maximal size of possible extension queue 207. Compared 26552 event pairs, 44 based on Foata normal form. 6/4206 useless extension candidates. Maximal degree in co-relation 52800. Up to 1310 conditions per place. [2024-06-27 17:02:57,114 INFO L140 encePairwiseOnDemand]: 9/21 looper letters, 418 selfloop transitions, 853 changer transitions 29/1301 dead transitions. [2024-06-27 17:02:57,114 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 553 places, 1301 transitions, 38012 flow [2024-06-27 17:02:57,115 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 113 states. [2024-06-27 17:02:57,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 113 states. [2024-06-27 17:02:57,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 897 transitions. [2024-06-27 17:02:57,118 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3780025284450063 [2024-06-27 17:02:57,118 INFO L175 Difference]: Start difference. First operand has 445 places, 910 transitions, 27628 flow. Second operand 113 states and 897 transitions. [2024-06-27 17:02:57,118 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 553 places, 1301 transitions, 38012 flow [2024-06-27 17:02:59,021 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 524 places, 1301 transitions, 37187 flow, removed 147 selfloop flow, removed 29 redundant places. [2024-06-27 17:02:59,045 INFO L231 Difference]: Finished difference. Result has 539 places, 1059 transitions, 34027 flow [2024-06-27 17:02:59,046 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=26933, PETRI_DIFFERENCE_MINUEND_PLACES=412, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=909, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=730, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=172, PETRI_DIFFERENCE_SUBTRAHEND_STATES=113, PETRI_FLOW=34027, PETRI_PLACES=539, PETRI_TRANSITIONS=1059} [2024-06-27 17:02:59,047 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 516 predicate places. [2024-06-27 17:02:59,047 INFO L495 AbstractCegarLoop]: Abstraction has has 539 places, 1059 transitions, 34027 flow [2024-06-27 17:02:59,047 INFO L496 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) [2024-06-27 17:02:59,047 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:02:59,047 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:02:59,058 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2024-06-27 17:02:59,247 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2024-06-27 17:02:59,248 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-06-27 17:02:59,249 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:02:59,249 INFO L85 PathProgramCache]: Analyzing trace with hash 1921420705, now seen corresponding path program 14 times [2024-06-27 17:02:59,249 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:02:59,249 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2133152115] [2024-06-27 17:02:59,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:02:59,249 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:02:59,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:02:59,464 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:02:59,464 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:02:59,464 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2133152115] [2024-06-27 17:02:59,464 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2133152115] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 17:02:59,464 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1371017220] [2024-06-27 17:02:59,465 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-06-27 17:02:59,465 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 17:02:59,465 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 17:02:59,466 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-06-27 17:02:59,467 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2024-06-27 17:02:59,501 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-06-27 17:02:59,502 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 17:02:59,502 INFO L262 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 18 conjunts are in the unsatisfiable core [2024-06-27 17:02:59,503 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 17:02:59,742 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:02:59,742 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 17:03:00,183 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:03:00,184 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1371017220] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 17:03:00,184 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 17:03:00,184 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 33 [2024-06-27 17:03:00,184 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [368708623] [2024-06-27 17:03:00,184 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 17:03:00,185 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2024-06-27 17:03:00,185 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:03:00,185 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2024-06-27 17:03:00,186 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=164, Invalid=958, Unknown=0, NotChecked=0, Total=1122 [2024-06-27 17:03:00,195 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 21 [2024-06-27 17:03:00,195 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 539 places, 1059 transitions, 34027 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) [2024-06-27 17:03:00,195 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:03:00,195 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 21 [2024-06-27 17:03:00,195 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:03:04,942 INFO L124 PetriNetUnfolderBase]: 2801/5033 cut-off events. [2024-06-27 17:03:04,943 INFO L125 PetriNetUnfolderBase]: For 214856/214856 co-relation queries the response was YES. [2024-06-27 17:03:04,980 INFO L83 FinitePrefix]: Finished finitePrefix Result has 68773 conditions, 5033 events. 2801/5033 cut-off events. For 214856/214856 co-relation queries the response was YES. Maximal size of possible extension queue 282. Compared 33037 event pairs, 71 based on Foata normal form. 5/5038 useless extension candidates. Maximal degree in co-relation 68241. Up to 1587 conditions per place. [2024-06-27 17:03:05,008 INFO L140 encePairwiseOnDemand]: 9/21 looper letters, 484 selfloop transitions, 1027 changer transitions 19/1531 dead transitions. [2024-06-27 17:03:05,008 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 619 places, 1531 transitions, 49581 flow [2024-06-27 17:03:05,008 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2024-06-27 17:03:05,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2024-06-27 17:03:05,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 715 transitions. [2024-06-27 17:03:05,010 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3959025470653378 [2024-06-27 17:03:05,010 INFO L175 Difference]: Start difference. First operand has 539 places, 1059 transitions, 34027 flow. Second operand 86 states and 715 transitions. [2024-06-27 17:03:05,010 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 619 places, 1531 transitions, 49581 flow [2024-06-27 17:03:08,402 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 562 places, 1531 transitions, 47276 flow, removed 714 selfloop flow, removed 57 redundant places. [2024-06-27 17:03:08,440 INFO L231 Difference]: Finished difference. Result has 592 places, 1325 transitions, 45080 flow [2024-06-27 17:03:08,441 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=32513, PETRI_DIFFERENCE_MINUEND_PLACES=477, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1058, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=770, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=218, PETRI_DIFFERENCE_SUBTRAHEND_STATES=86, PETRI_FLOW=45080, PETRI_PLACES=592, PETRI_TRANSITIONS=1325} [2024-06-27 17:03:08,442 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 569 predicate places. [2024-06-27 17:03:08,442 INFO L495 AbstractCegarLoop]: Abstraction has has 592 places, 1325 transitions, 45080 flow [2024-06-27 17:03:08,442 INFO L496 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) [2024-06-27 17:03:08,442 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:03:08,443 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:03:08,457 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2024-06-27 17:03:08,656 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 17:03:08,656 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-06-27 17:03:08,657 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:03:08,657 INFO L85 PathProgramCache]: Analyzing trace with hash -105111933, now seen corresponding path program 15 times [2024-06-27 17:03:08,657 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:03:08,657 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [53381250] [2024-06-27 17:03:08,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:03:08,657 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:03:08,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:03:08,893 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:03:08,893 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:03:08,893 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [53381250] [2024-06-27 17:03:08,894 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [53381250] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 17:03:08,894 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1842871998] [2024-06-27 17:03:08,894 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-06-27 17:03:08,894 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 17:03:08,894 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 17:03:08,895 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-06-27 17:03:08,896 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2024-06-27 17:03:08,930 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-06-27 17:03:08,930 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 17:03:08,930 INFO L262 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 18 conjunts are in the unsatisfiable core [2024-06-27 17:03:08,932 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 17:03:09,186 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:03:09,186 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 17:03:09,681 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:03:09,682 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1842871998] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 17:03:09,682 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 17:03:09,682 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 33 [2024-06-27 17:03:09,682 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1675499807] [2024-06-27 17:03:09,682 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 17:03:09,682 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2024-06-27 17:03:09,683 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:03:09,683 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2024-06-27 17:03:09,683 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=969, Unknown=0, NotChecked=0, Total=1122 [2024-06-27 17:03:09,696 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 21 [2024-06-27 17:03:09,696 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 592 places, 1325 transitions, 45080 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) [2024-06-27 17:03:09,696 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:03:09,697 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 21 [2024-06-27 17:03:09,697 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:03:14,912 INFO L124 PetriNetUnfolderBase]: 3191/5728 cut-off events. [2024-06-27 17:03:14,912 INFO L125 PetriNetUnfolderBase]: For 286657/286657 co-relation queries the response was YES. [2024-06-27 17:03:14,954 INFO L83 FinitePrefix]: Finished finitePrefix Result has 81377 conditions, 5728 events. 3191/5728 cut-off events. For 286657/286657 co-relation queries the response was YES. Maximal size of possible extension queue 330. Compared 38682 event pairs, 87 based on Foata normal form. 4/5732 useless extension candidates. Maximal degree in co-relation 80878. Up to 2498 conditions per place. [2024-06-27 17:03:14,984 INFO L140 encePairwiseOnDemand]: 9/21 looper letters, 630 selfloop transitions, 1009 changer transitions 25/1665 dead transitions. [2024-06-27 17:03:14,984 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 658 places, 1665 transitions, 56987 flow [2024-06-27 17:03:14,985 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2024-06-27 17:03:14,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2024-06-27 17:03:14,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 565 transitions. [2024-06-27 17:03:14,986 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3843537414965986 [2024-06-27 17:03:14,986 INFO L175 Difference]: Start difference. First operand has 592 places, 1325 transitions, 45080 flow. Second operand 70 states and 565 transitions. [2024-06-27 17:03:14,986 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 658 places, 1665 transitions, 56987 flow [2024-06-27 17:03:19,538 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 638 places, 1665 transitions, 56007 flow, removed 245 selfloop flow, removed 20 redundant places. [2024-06-27 17:03:19,583 INFO L231 Difference]: Finished difference. Result has 672 places, 1507 transitions, 54821 flow [2024-06-27 17:03:19,585 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=44206, PETRI_DIFFERENCE_MINUEND_PLACES=569, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1325, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=828, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=413, PETRI_DIFFERENCE_SUBTRAHEND_STATES=70, PETRI_FLOW=54821, PETRI_PLACES=672, PETRI_TRANSITIONS=1507} [2024-06-27 17:03:19,585 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 649 predicate places. [2024-06-27 17:03:19,585 INFO L495 AbstractCegarLoop]: Abstraction has has 672 places, 1507 transitions, 54821 flow [2024-06-27 17:03:19,585 INFO L496 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) [2024-06-27 17:03:19,586 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:03:19,586 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:03:19,607 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2024-06-27 17:03:19,808 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2024-06-27 17:03:19,808 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-06-27 17:03:19,808 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:03:19,809 INFO L85 PathProgramCache]: Analyzing trace with hash 209949993, now seen corresponding path program 16 times [2024-06-27 17:03:19,809 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:03:19,809 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1957764035] [2024-06-27 17:03:19,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:03:19,809 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:03:19,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:03:20,024 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:03:20,024 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:03:20,024 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1957764035] [2024-06-27 17:03:20,024 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1957764035] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 17:03:20,025 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1058655671] [2024-06-27 17:03:20,025 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-06-27 17:03:20,025 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 17:03:20,025 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 17:03:20,026 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-06-27 17:03:20,046 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2024-06-27 17:03:20,069 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-06-27 17:03:20,070 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 17:03:20,070 INFO L262 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 18 conjunts are in the unsatisfiable core [2024-06-27 17:03:20,071 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 17:03:20,337 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:03:20,337 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 17:03:20,747 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:03:20,748 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1058655671] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 17:03:20,748 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 17:03:20,748 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 33 [2024-06-27 17:03:20,748 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [544140571] [2024-06-27 17:03:20,748 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 17:03:20,749 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2024-06-27 17:03:20,749 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:03:20,749 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2024-06-27 17:03:20,750 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=168, Invalid=954, Unknown=0, NotChecked=0, Total=1122 [2024-06-27 17:03:20,756 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 21 [2024-06-27 17:03:20,757 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 672 places, 1507 transitions, 54821 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) [2024-06-27 17:03:20,757 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:03:20,757 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 21 [2024-06-27 17:03:20,757 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:03:26,851 INFO L124 PetriNetUnfolderBase]: 3477/6276 cut-off events. [2024-06-27 17:03:26,851 INFO L125 PetriNetUnfolderBase]: For 384671/384671 co-relation queries the response was YES. [2024-06-27 17:03:26,906 INFO L83 FinitePrefix]: Finished finitePrefix Result has 94639 conditions, 6276 events. 3477/6276 cut-off events. For 384671/384671 co-relation queries the response was YES. Maximal size of possible extension queue 389. Compared 43487 event pairs, 89 based on Foata normal form. 6/6282 useless extension candidates. Maximal degree in co-relation 94123. Up to 2396 conditions per place. [2024-06-27 17:03:26,939 INFO L140 encePairwiseOnDemand]: 9/21 looper letters, 615 selfloop transitions, 1217 changer transitions 20/1853 dead transitions. [2024-06-27 17:03:26,939 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 749 places, 1853 transitions, 67069 flow [2024-06-27 17:03:26,940 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2024-06-27 17:03:26,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2024-06-27 17:03:26,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 667 transitions. [2024-06-27 17:03:26,941 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3873403019744483 [2024-06-27 17:03:26,941 INFO L175 Difference]: Start difference. First operand has 672 places, 1507 transitions, 54821 flow. Second operand 82 states and 667 transitions. [2024-06-27 17:03:26,941 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 749 places, 1853 transitions, 67069 flow [2024-06-27 17:03:32,985 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 729 places, 1853 transitions, 66739 flow, removed 84 selfloop flow, removed 20 redundant places. [2024-06-27 17:03:33,034 INFO L231 Difference]: Finished difference. Result has 754 places, 1659 transitions, 64996 flow [2024-06-27 17:03:33,036 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=54577, PETRI_DIFFERENCE_MINUEND_PLACES=648, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1507, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1082, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=395, PETRI_DIFFERENCE_SUBTRAHEND_STATES=82, PETRI_FLOW=64996, PETRI_PLACES=754, PETRI_TRANSITIONS=1659} [2024-06-27 17:03:33,036 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 731 predicate places. [2024-06-27 17:03:33,036 INFO L495 AbstractCegarLoop]: Abstraction has has 754 places, 1659 transitions, 64996 flow [2024-06-27 17:03:33,036 INFO L496 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) [2024-06-27 17:03:33,037 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:03:33,037 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:03:33,056 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2024-06-27 17:03:33,253 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2024-06-27 17:03:33,254 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-06-27 17:03:33,254 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:03:33,254 INFO L85 PathProgramCache]: Analyzing trace with hash 76784223, now seen corresponding path program 17 times [2024-06-27 17:03:33,254 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:03:33,254 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1628439241] [2024-06-27 17:03:33,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:03:33,255 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:03:33,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:03:33,463 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:03:33,464 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:03:33,464 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1628439241] [2024-06-27 17:03:33,464 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1628439241] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 17:03:33,464 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [396125811] [2024-06-27 17:03:33,464 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-06-27 17:03:33,464 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 17:03:33,464 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 17:03:33,466 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-06-27 17:03:33,482 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2024-06-27 17:03:33,523 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2024-06-27 17:03:33,523 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 17:03:33,524 INFO L262 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 18 conjunts are in the unsatisfiable core [2024-06-27 17:03:33,525 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 17:03:33,790 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:03:33,791 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 17:03:34,202 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:03:34,203 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [396125811] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 17:03:34,203 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 17:03:34,203 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 33 [2024-06-27 17:03:34,203 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1076379739] [2024-06-27 17:03:34,203 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 17:03:34,203 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2024-06-27 17:03:34,203 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:03:34,204 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2024-06-27 17:03:34,204 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=169, Invalid=953, Unknown=0, NotChecked=0, Total=1122 [2024-06-27 17:03:34,215 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 21 [2024-06-27 17:03:34,215 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 754 places, 1659 transitions, 64996 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) [2024-06-27 17:03:34,215 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:03:34,215 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 21 [2024-06-27 17:03:34,216 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:03:41,482 INFO L124 PetriNetUnfolderBase]: 3494/6298 cut-off events. [2024-06-27 17:03:41,482 INFO L125 PetriNetUnfolderBase]: For 424164/424164 co-relation queries the response was YES. [2024-06-27 17:03:41,545 INFO L83 FinitePrefix]: Finished finitePrefix Result has 100911 conditions, 6298 events. 3494/6298 cut-off events. For 424164/424164 co-relation queries the response was YES. Maximal size of possible extension queue 388. Compared 43556 event pairs, 92 based on Foata normal form. 5/6303 useless extension candidates. Maximal degree in co-relation 100361. Up to 2423 conditions per place. [2024-06-27 17:03:41,582 INFO L140 encePairwiseOnDemand]: 9/21 looper letters, 638 selfloop transitions, 1200 changer transitions 27/1866 dead transitions. [2024-06-27 17:03:41,582 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 845 places, 1866 transitions, 71754 flow [2024-06-27 17:03:41,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 97 states. [2024-06-27 17:03:41,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2024-06-27 17:03:41,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 748 transitions. [2024-06-27 17:03:41,584 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36720667648502703 [2024-06-27 17:03:41,585 INFO L175 Difference]: Start difference. First operand has 754 places, 1659 transitions, 64996 flow. Second operand 97 states and 748 transitions. [2024-06-27 17:03:41,585 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 845 places, 1866 transitions, 71754 flow [2024-06-27 17:03:49,309 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 807 places, 1866 transitions, 70277 flow, removed 536 selfloop flow, removed 38 redundant places. [2024-06-27 17:03:49,357 INFO L231 Difference]: Finished difference. Result has 816 places, 1683 transitions, 67842 flow [2024-06-27 17:03:49,359 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=63625, PETRI_DIFFERENCE_MINUEND_PLACES=711, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1656, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1176, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=471, PETRI_DIFFERENCE_SUBTRAHEND_STATES=97, PETRI_FLOW=67842, PETRI_PLACES=816, PETRI_TRANSITIONS=1683} [2024-06-27 17:03:49,359 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 793 predicate places. [2024-06-27 17:03:49,359 INFO L495 AbstractCegarLoop]: Abstraction has has 816 places, 1683 transitions, 67842 flow [2024-06-27 17:03:49,360 INFO L496 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) [2024-06-27 17:03:49,360 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:03:49,360 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:03:49,371 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2024-06-27 17:03:49,560 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 17:03:49,560 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-06-27 17:03:49,561 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:03:49,561 INFO L85 PathProgramCache]: Analyzing trace with hash 1879233675, now seen corresponding path program 18 times [2024-06-27 17:03:49,561 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:03:49,561 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [642445878] [2024-06-27 17:03:49,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:03:49,562 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:03:49,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:03:49,767 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:03:49,767 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:03:49,767 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [642445878] [2024-06-27 17:03:49,768 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [642445878] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 17:03:49,768 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1931862666] [2024-06-27 17:03:49,768 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-06-27 17:03:49,768 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 17:03:49,768 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 17:03:49,769 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-06-27 17:03:49,771 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2024-06-27 17:03:49,827 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2024-06-27 17:03:49,827 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 17:03:49,828 INFO L262 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 18 conjunts are in the unsatisfiable core [2024-06-27 17:03:49,829 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 17:03:50,087 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:03:50,087 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 17:03:50,461 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:03:50,462 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1931862666] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 17:03:50,462 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 17:03:50,462 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 33 [2024-06-27 17:03:50,462 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1307606114] [2024-06-27 17:03:50,462 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 17:03:50,463 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2024-06-27 17:03:50,463 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:03:50,463 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2024-06-27 17:03:50,464 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=194, Invalid=928, Unknown=0, NotChecked=0, Total=1122 [2024-06-27 17:03:50,482 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 21 [2024-06-27 17:03:50,483 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 816 places, 1683 transitions, 67842 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) [2024-06-27 17:03:50,483 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:03:50,483 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 21 [2024-06-27 17:03:50,483 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:03:56,439 INFO L124 PetriNetUnfolderBase]: 3795/6850 cut-off events. [2024-06-27 17:03:56,439 INFO L125 PetriNetUnfolderBase]: For 430179/430179 co-relation queries the response was YES. [2024-06-27 17:03:56,509 INFO L83 FinitePrefix]: Finished finitePrefix Result has 110053 conditions, 6850 events. 3795/6850 cut-off events. For 430179/430179 co-relation queries the response was YES. Maximal size of possible extension queue 419. Compared 48448 event pairs, 125 based on Foata normal form. 7/6857 useless extension candidates. Maximal degree in co-relation 109631. Up to 3431 conditions per place. [2024-06-27 17:03:56,551 INFO L140 encePairwiseOnDemand]: 10/21 looper letters, 728 selfloop transitions, 1243 changer transitions 19/1991 dead transitions. [2024-06-27 17:03:56,552 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 874 places, 1991 transitions, 79236 flow [2024-06-27 17:03:56,552 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2024-06-27 17:03:56,552 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2024-06-27 17:03:56,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 503 transitions. [2024-06-27 17:03:56,553 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3742559523809524 [2024-06-27 17:03:56,553 INFO L175 Difference]: Start difference. First operand has 816 places, 1683 transitions, 67842 flow. Second operand 64 states and 503 transitions. [2024-06-27 17:03:56,553 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 874 places, 1991 transitions, 79236 flow [2024-06-27 17:04:05,285 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 802 places, 1991 transitions, 78202 flow, removed 116 selfloop flow, removed 72 redundant places. [2024-06-27 17:04:05,337 INFO L231 Difference]: Finished difference. Result has 825 places, 1843 transitions, 77109 flow [2024-06-27 17:04:05,338 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=66900, PETRI_DIFFERENCE_MINUEND_PLACES=739, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1683, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1098, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=518, PETRI_DIFFERENCE_SUBTRAHEND_STATES=64, PETRI_FLOW=77109, PETRI_PLACES=825, PETRI_TRANSITIONS=1843} [2024-06-27 17:04:05,339 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 802 predicate places. [2024-06-27 17:04:05,339 INFO L495 AbstractCegarLoop]: Abstraction has has 825 places, 1843 transitions, 77109 flow [2024-06-27 17:04:05,339 INFO L496 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) [2024-06-27 17:04:05,339 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:04:05,339 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:04:05,352 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2024-06-27 17:04:05,546 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 17:04:05,546 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-06-27 17:04:05,547 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:04:05,547 INFO L85 PathProgramCache]: Analyzing trace with hash -830555685, now seen corresponding path program 19 times [2024-06-27 17:04:05,547 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:04:05,547 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1991291829] [2024-06-27 17:04:05,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:04:05,547 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:04:05,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:04:05,772 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:04:05,772 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:04:05,772 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1991291829] [2024-06-27 17:04:05,772 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1991291829] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 17:04:05,773 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1745807167] [2024-06-27 17:04:05,773 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-06-27 17:04:05,773 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 17:04:05,773 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 17:04:05,774 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-06-27 17:04:05,777 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2024-06-27 17:04:05,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:04:05,834 INFO L262 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 18 conjunts are in the unsatisfiable core [2024-06-27 17:04:05,835 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 17:04:06,095 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:04:06,095 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 17:04:06,472 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:04:06,472 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1745807167] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 17:04:06,472 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 17:04:06,472 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 33 [2024-06-27 17:04:06,472 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [830239336] [2024-06-27 17:04:06,472 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 17:04:06,473 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2024-06-27 17:04:06,473 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:04:06,473 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2024-06-27 17:04:06,473 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=201, Invalid=921, Unknown=0, NotChecked=0, Total=1122 [2024-06-27 17:04:06,477 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 21 [2024-06-27 17:04:06,478 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 825 places, 1843 transitions, 77109 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) [2024-06-27 17:04:06,478 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:04:06,478 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 21 [2024-06-27 17:04:06,478 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:04:14,241 INFO L124 PetriNetUnfolderBase]: 4080/7379 cut-off events. [2024-06-27 17:04:14,241 INFO L125 PetriNetUnfolderBase]: For 561038/561038 co-relation queries the response was YES. [2024-06-27 17:04:14,319 INFO L83 FinitePrefix]: Finished finitePrefix Result has 124932 conditions, 7379 events. 4080/7379 cut-off events. For 561038/561038 co-relation queries the response was YES. Maximal size of possible extension queue 456. Compared 53052 event pairs, 102 based on Foata normal form. 14/7393 useless extension candidates. Maximal degree in co-relation 124513. Up to 3082 conditions per place. [2024-06-27 17:04:14,364 INFO L140 encePairwiseOnDemand]: 9/21 looper letters, 763 selfloop transitions, 1360 changer transitions 34/2158 dead transitions. [2024-06-27 17:04:14,364 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 899 places, 2158 transitions, 89453 flow [2024-06-27 17:04:14,365 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 87 states. [2024-06-27 17:04:14,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2024-06-27 17:04:14,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 684 transitions. [2024-06-27 17:04:14,366 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37438423645320196 [2024-06-27 17:04:14,366 INFO L175 Difference]: Start difference. First operand has 825 places, 1843 transitions, 77109 flow. Second operand 87 states and 684 transitions. [2024-06-27 17:04:14,366 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 899 places, 2158 transitions, 89453 flow [2024-06-27 17:04:25,328 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 876 places, 2158 transitions, 88891 flow, removed 184 selfloop flow, removed 23 redundant places. [2024-06-27 17:04:25,384 INFO L231 Difference]: Finished difference. Result has 896 places, 1975 transitions, 86843 flow [2024-06-27 17:04:25,386 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=76211, PETRI_DIFFERENCE_MINUEND_PLACES=790, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1832, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1230, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=541, PETRI_DIFFERENCE_SUBTRAHEND_STATES=87, PETRI_FLOW=86843, PETRI_PLACES=896, PETRI_TRANSITIONS=1975} [2024-06-27 17:04:25,386 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 873 predicate places. [2024-06-27 17:04:25,386 INFO L495 AbstractCegarLoop]: Abstraction has has 896 places, 1975 transitions, 86843 flow [2024-06-27 17:04:25,386 INFO L496 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) [2024-06-27 17:04:25,386 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:04:25,386 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:04:25,397 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2024-06-27 17:04:25,587 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 17:04:25,587 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-06-27 17:04:25,587 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:04:25,587 INFO L85 PathProgramCache]: Analyzing trace with hash -697389915, now seen corresponding path program 20 times [2024-06-27 17:04:25,588 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:04:25,588 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1973651140] [2024-06-27 17:04:25,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:04:25,588 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:04:25,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:04:25,815 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:04:25,815 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:04:25,815 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1973651140] [2024-06-27 17:04:25,816 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1973651140] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 17:04:25,816 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1215840184] [2024-06-27 17:04:25,816 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-06-27 17:04:25,816 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 17:04:25,816 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 17:04:25,817 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-06-27 17:04:25,819 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2024-06-27 17:04:25,879 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-06-27 17:04:25,879 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 17:04:25,880 INFO L262 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 18 conjunts are in the unsatisfiable core [2024-06-27 17:04:25,881 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 17:04:26,150 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:04:26,150 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 17:04:26,540 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:04:26,540 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1215840184] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 17:04:26,540 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 17:04:26,540 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 33 [2024-06-27 17:04:26,540 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1941038287] [2024-06-27 17:04:26,540 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 17:04:26,541 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2024-06-27 17:04:26,541 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:04:26,541 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2024-06-27 17:04:26,541 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=198, Invalid=924, Unknown=0, NotChecked=0, Total=1122 [2024-06-27 17:04:26,553 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 21 [2024-06-27 17:04:26,553 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 896 places, 1975 transitions, 86843 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) [2024-06-27 17:04:26,553 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:04:26,553 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 21 [2024-06-27 17:04:26,553 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:04:34,508 INFO L124 PetriNetUnfolderBase]: 4071/7356 cut-off events. [2024-06-27 17:04:34,508 INFO L125 PetriNetUnfolderBase]: For 647864/647864 co-relation queries the response was YES. [2024-06-27 17:04:34,742 INFO L83 FinitePrefix]: Finished finitePrefix Result has 131373 conditions, 7356 events. 4071/7356 cut-off events. For 647864/647864 co-relation queries the response was YES. Maximal size of possible extension queue 452. Compared 52718 event pairs, 103 based on Foata normal form. 3/7359 useless extension candidates. Maximal degree in co-relation 131012. Up to 3171 conditions per place. [2024-06-27 17:04:34,787 INFO L140 encePairwiseOnDemand]: 10/21 looper letters, 676 selfloop transitions, 1452 changer transitions 29/2158 dead transitions. [2024-06-27 17:04:34,787 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 968 places, 2158 transitions, 94532 flow [2024-06-27 17:04:34,787 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2024-06-27 17:04:34,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2024-06-27 17:04:34,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 613 transitions. [2024-06-27 17:04:34,789 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37909709338280767 [2024-06-27 17:04:34,789 INFO L175 Difference]: Start difference. First operand has 896 places, 1975 transitions, 86843 flow. Second operand 77 states and 613 transitions. [2024-06-27 17:04:34,789 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 968 places, 2158 transitions, 94532 flow [2024-06-27 17:04:47,638 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 907 places, 2158 transitions, 92905 flow, removed 412 selfloop flow, removed 61 redundant places. [2024-06-27 17:04:47,699 INFO L231 Difference]: Finished difference. Result has 915 places, 1997 transitions, 89900 flow [2024-06-27 17:04:47,701 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=85356, PETRI_DIFFERENCE_MINUEND_PLACES=831, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1975, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1430, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=537, PETRI_DIFFERENCE_SUBTRAHEND_STATES=77, PETRI_FLOW=89900, PETRI_PLACES=915, PETRI_TRANSITIONS=1997} [2024-06-27 17:04:47,701 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 892 predicate places. [2024-06-27 17:04:47,701 INFO L495 AbstractCegarLoop]: Abstraction has has 915 places, 1997 transitions, 89900 flow [2024-06-27 17:04:47,701 INFO L496 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) [2024-06-27 17:04:47,701 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:04:47,701 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:04:47,712 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2024-06-27 17:04:47,902 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2024-06-27 17:04:47,902 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-06-27 17:04:47,902 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:04:47,902 INFO L85 PathProgramCache]: Analyzing trace with hash 1005492995, now seen corresponding path program 21 times [2024-06-27 17:04:47,902 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:04:47,903 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1515186715] [2024-06-27 17:04:47,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:04:47,903 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:04:47,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:04:48,099 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:04:48,099 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:04:48,099 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1515186715] [2024-06-27 17:04:48,100 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1515186715] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 17:04:48,100 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [12134198] [2024-06-27 17:04:48,100 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-06-27 17:04:48,100 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 17:04:48,100 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 17:04:48,101 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-06-27 17:04:48,104 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2024-06-27 17:04:48,162 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2024-06-27 17:04:48,162 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 17:04:48,163 INFO L262 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 18 conjunts are in the unsatisfiable core [2024-06-27 17:04:48,164 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 17:04:48,392 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:04:48,393 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 17:04:48,773 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:04:48,774 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [12134198] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 17:04:48,774 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 17:04:48,774 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 33 [2024-06-27 17:04:48,774 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [202010296] [2024-06-27 17:04:48,774 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 17:04:48,774 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2024-06-27 17:04:48,774 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:04:48,775 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2024-06-27 17:04:48,775 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=186, Invalid=936, Unknown=0, NotChecked=0, Total=1122 [2024-06-27 17:04:48,783 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 21 [2024-06-27 17:04:48,783 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 915 places, 1997 transitions, 89900 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) [2024-06-27 17:04:48,783 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:04:48,783 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 21 [2024-06-27 17:04:48,784 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:04:55,276 INFO L124 PetriNetUnfolderBase]: 4059/7314 cut-off events. [2024-06-27 17:04:55,277 INFO L125 PetriNetUnfolderBase]: For 647881/647881 co-relation queries the response was YES. [2024-06-27 17:04:55,359 INFO L83 FinitePrefix]: Finished finitePrefix Result has 133125 conditions, 7314 events. 4059/7314 cut-off events. For 647881/647881 co-relation queries the response was YES. Maximal size of possible extension queue 443. Compared 52166 event pairs, 130 based on Foata normal form. 6/7320 useless extension candidates. Maximal degree in co-relation 132754. Up to 4025 conditions per place. [2024-06-27 17:04:55,403 INFO L140 encePairwiseOnDemand]: 10/21 looper letters, 797 selfloop transitions, 1285 changer transitions 18/2101 dead transitions. [2024-06-27 17:04:55,404 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 947 places, 2101 transitions, 95714 flow [2024-06-27 17:04:55,404 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2024-06-27 17:04:55,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2024-06-27 17:04:55,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 329 transitions. [2024-06-27 17:04:55,405 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4017094017094017 [2024-06-27 17:04:55,405 INFO L175 Difference]: Start difference. First operand has 915 places, 1997 transitions, 89900 flow. Second operand 39 states and 329 transitions. [2024-06-27 17:04:55,405 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 947 places, 2101 transitions, 95714 flow [2024-06-27 17:05:08,545 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 894 places, 2101 transitions, 94736 flow, removed 171 selfloop flow, removed 53 redundant places. [2024-06-27 17:05:08,607 INFO L231 Difference]: Finished difference. Result has 900 places, 2000 transitions, 93007 flow [2024-06-27 17:05:08,609 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=88943, PETRI_DIFFERENCE_MINUEND_PLACES=856, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1996, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1278, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=713, PETRI_DIFFERENCE_SUBTRAHEND_STATES=39, PETRI_FLOW=93007, PETRI_PLACES=900, PETRI_TRANSITIONS=2000} [2024-06-27 17:05:08,610 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 877 predicate places. [2024-06-27 17:05:08,610 INFO L495 AbstractCegarLoop]: Abstraction has has 900 places, 2000 transitions, 93007 flow [2024-06-27 17:05:08,610 INFO L496 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) [2024-06-27 17:05:08,610 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:05:08,610 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:05:08,620 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2024-06-27 17:05:08,810 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2024-06-27 17:05:08,811 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-06-27 17:05:08,811 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:05:08,811 INFO L85 PathProgramCache]: Analyzing trace with hash -403164891, now seen corresponding path program 22 times [2024-06-27 17:05:08,811 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:05:08,812 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [353765285] [2024-06-27 17:05:08,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:05:08,812 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:05:08,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:05:09,019 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:05:09,020 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:05:09,020 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [353765285] [2024-06-27 17:05:09,020 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [353765285] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 17:05:09,020 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [114148341] [2024-06-27 17:05:09,020 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-06-27 17:05:09,020 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 17:05:09,020 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 17:05:09,021 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-06-27 17:05:09,022 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2024-06-27 17:05:09,075 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-06-27 17:05:09,075 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 17:05:09,075 INFO L262 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 18 conjunts are in the unsatisfiable core [2024-06-27 17:05:09,076 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 17:05:09,320 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:05:09,320 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 17:05:09,769 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:05:09,769 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [114148341] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 17:05:09,769 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 17:05:09,770 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 33 [2024-06-27 17:05:09,770 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [767566043] [2024-06-27 17:05:09,770 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 17:05:09,770 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2024-06-27 17:05:09,770 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:05:09,771 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2024-06-27 17:05:09,771 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=152, Invalid=970, Unknown=0, NotChecked=0, Total=1122 [2024-06-27 17:05:09,776 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 21 [2024-06-27 17:05:09,776 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 900 places, 2000 transitions, 93007 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) [2024-06-27 17:05:09,776 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:05:09,776 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 21 [2024-06-27 17:05:09,776 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:05:18,581 INFO L124 PetriNetUnfolderBase]: 4430/7975 cut-off events. [2024-06-27 17:05:18,581 INFO L125 PetriNetUnfolderBase]: For 755026/755026 co-relation queries the response was YES. [2024-06-27 17:05:18,672 INFO L83 FinitePrefix]: Finished finitePrefix Result has 150991 conditions, 7975 events. 4430/7975 cut-off events. For 755026/755026 co-relation queries the response was YES. Maximal size of possible extension queue 490. Compared 57774 event pairs, 115 based on Foata normal form. 4/7979 useless extension candidates. Maximal degree in co-relation 150740. Up to 3924 conditions per place. [2024-06-27 17:05:18,727 INFO L140 encePairwiseOnDemand]: 9/21 looper letters, 916 selfloop transitions, 1386 changer transitions 25/2328 dead transitions. [2024-06-27 17:05:18,728 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 964 places, 2328 transitions, 109104 flow [2024-06-27 17:05:18,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2024-06-27 17:05:18,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2024-06-27 17:05:18,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 559 transitions. [2024-06-27 17:05:18,729 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39729921819474057 [2024-06-27 17:05:18,730 INFO L175 Difference]: Start difference. First operand has 900 places, 2000 transitions, 93007 flow. Second operand 67 states and 559 transitions. [2024-06-27 17:05:18,730 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 964 places, 2328 transitions, 109104 flow [2024-06-27 17:05:34,630 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 939 places, 2328 transitions, 108381 flow, removed 19 selfloop flow, removed 25 redundant places. [2024-06-27 17:05:34,697 INFO L231 Difference]: Finished difference. Result has 968 places, 2179 transitions, 107002 flow [2024-06-27 17:05:34,698 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=92339, PETRI_DIFFERENCE_MINUEND_PLACES=873, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2000, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1208, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=709, PETRI_DIFFERENCE_SUBTRAHEND_STATES=67, PETRI_FLOW=107002, PETRI_PLACES=968, PETRI_TRANSITIONS=2179} [2024-06-27 17:05:34,699 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 945 predicate places. [2024-06-27 17:05:34,699 INFO L495 AbstractCegarLoop]: Abstraction has has 968 places, 2179 transitions, 107002 flow [2024-06-27 17:05:34,699 INFO L496 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) [2024-06-27 17:05:34,699 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:05:34,699 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:05:34,712 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0 [2024-06-27 17:05:34,899 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 17:05:34,900 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-06-27 17:05:34,900 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:05:34,900 INFO L85 PathProgramCache]: Analyzing trace with hash 993435395, now seen corresponding path program 23 times [2024-06-27 17:05:34,900 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:05:34,900 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [951196745] [2024-06-27 17:05:34,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:05:34,901 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:05:34,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:05:35,085 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:05:35,086 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:05:35,086 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [951196745] [2024-06-27 17:05:35,086 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [951196745] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 17:05:35,086 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [290254561] [2024-06-27 17:05:35,086 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-06-27 17:05:35,086 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 17:05:35,086 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 17:05:35,087 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-06-27 17:05:35,088 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2024-06-27 17:05:35,141 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2024-06-27 17:05:35,141 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 17:05:35,142 INFO L262 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 18 conjunts are in the unsatisfiable core [2024-06-27 17:05:35,142 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 17:05:35,421 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:05:35,421 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 17:05:35,801 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:05:35,801 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [290254561] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 17:05:35,801 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 17:05:35,801 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 33 [2024-06-27 17:05:35,801 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1082829468] [2024-06-27 17:05:35,801 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 17:05:35,802 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2024-06-27 17:05:35,802 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:05:35,802 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2024-06-27 17:05:35,803 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=188, Invalid=934, Unknown=0, NotChecked=0, Total=1122 [2024-06-27 17:05:35,818 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 21 [2024-06-27 17:05:35,819 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 968 places, 2179 transitions, 107002 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) [2024-06-27 17:05:35,819 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:05:35,819 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 21 [2024-06-27 17:05:35,819 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:05:45,738 INFO L124 PetriNetUnfolderBase]: 4627/8341 cut-off events. [2024-06-27 17:05:45,739 INFO L125 PetriNetUnfolderBase]: For 893104/893104 co-relation queries the response was YES. [2024-06-27 17:05:45,848 INFO L83 FinitePrefix]: Finished finitePrefix Result has 164810 conditions, 8341 events. 4627/8341 cut-off events. For 893104/893104 co-relation queries the response was YES. Maximal size of possible extension queue 516. Compared 61058 event pairs, 149 based on Foata normal form. 5/8346 useless extension candidates. Maximal degree in co-relation 164302. Up to 4193 conditions per place. [2024-06-27 17:05:45,904 INFO L140 encePairwiseOnDemand]: 10/21 looper letters, 885 selfloop transitions, 1531 changer transitions 19/2436 dead transitions. [2024-06-27 17:05:45,905 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1033 places, 2436 transitions, 119779 flow [2024-06-27 17:05:45,905 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2024-06-27 17:05:45,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2024-06-27 17:05:45,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 534 transitions. [2024-06-27 17:05:45,906 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.363265306122449 [2024-06-27 17:05:45,906 INFO L175 Difference]: Start difference. First operand has 968 places, 2179 transitions, 107002 flow. Second operand 70 states and 534 transitions. [2024-06-27 17:05:45,906 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1033 places, 2436 transitions, 119779 flow [2024-06-27 17:06:04,848 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1005 places, 2436 transitions, 119338 flow, removed 66 selfloop flow, removed 28 redundant places. [2024-06-27 17:06:04,922 INFO L231 Difference]: Finished difference. Result has 1021 places, 2283 transitions, 117936 flow [2024-06-27 17:06:04,924 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=106585, PETRI_DIFFERENCE_MINUEND_PLACES=936, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2179, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1439, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=713, PETRI_DIFFERENCE_SUBTRAHEND_STATES=70, PETRI_FLOW=117936, PETRI_PLACES=1021, PETRI_TRANSITIONS=2283} [2024-06-27 17:06:04,925 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 998 predicate places. [2024-06-27 17:06:04,925 INFO L495 AbstractCegarLoop]: Abstraction has has 1021 places, 2283 transitions, 117936 flow [2024-06-27 17:06:04,925 INFO L496 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) [2024-06-27 17:06:04,926 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:06:04,926 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:06:04,940 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2024-06-27 17:06:05,135 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 17:06:05,136 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-06-27 17:06:05,136 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:06:05,136 INFO L85 PathProgramCache]: Analyzing trace with hash -900875145, now seen corresponding path program 24 times [2024-06-27 17:06:05,136 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:06:05,136 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1793502745] [2024-06-27 17:06:05,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:06:05,136 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:06:05,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:06:05,342 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:06:05,342 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:06:05,342 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1793502745] [2024-06-27 17:06:05,343 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1793502745] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 17:06:05,343 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [183026759] [2024-06-27 17:06:05,343 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-06-27 17:06:05,343 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 17:06:05,343 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 17:06:05,344 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-06-27 17:06:05,352 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2024-06-27 17:06:05,406 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2024-06-27 17:06:05,406 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 17:06:05,407 INFO L262 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 18 conjunts are in the unsatisfiable core [2024-06-27 17:06:05,408 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 17:06:05,653 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:06:05,653 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 17:06:06,075 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:06:06,076 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [183026759] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 17:06:06,076 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 17:06:06,076 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 33 [2024-06-27 17:06:06,076 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1261255441] [2024-06-27 17:06:06,076 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 17:06:06,077 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2024-06-27 17:06:06,077 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:06:06,077 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2024-06-27 17:06:06,078 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=181, Invalid=941, Unknown=0, NotChecked=0, Total=1122 [2024-06-27 17:06:06,081 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 21 [2024-06-27 17:06:06,081 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1021 places, 2283 transitions, 117936 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) [2024-06-27 17:06:06,081 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:06:06,081 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 21 [2024-06-27 17:06:06,081 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:06:15,425 INFO L124 PetriNetUnfolderBase]: 4774/8598 cut-off events. [2024-06-27 17:06:15,425 INFO L125 PetriNetUnfolderBase]: For 1000467/1000467 co-relation queries the response was YES. [2024-06-27 17:06:15,541 INFO L83 FinitePrefix]: Finished finitePrefix Result has 177248 conditions, 8598 events. 4774/8598 cut-off events. For 1000467/1000467 co-relation queries the response was YES. Maximal size of possible extension queue 528. Compared 63298 event pairs, 156 based on Foata normal form. 3/8601 useless extension candidates. Maximal degree in co-relation 176734. Up to 4585 conditions per place. [2024-06-27 17:06:15,602 INFO L140 encePairwiseOnDemand]: 10/21 looper letters, 919 selfloop transitions, 1559 changer transitions 11/2490 dead transitions. [2024-06-27 17:06:15,602 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1065 places, 2490 transitions, 129528 flow [2024-06-27 17:06:15,602 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2024-06-27 17:06:15,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2024-06-27 17:06:15,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 394 transitions. [2024-06-27 17:06:15,603 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38289601554907676 [2024-06-27 17:06:15,603 INFO L175 Difference]: Start difference. First operand has 1021 places, 2283 transitions, 117936 flow. Second operand 49 states and 394 transitions. [2024-06-27 17:06:15,604 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1065 places, 2490 transitions, 129528 flow [2024-06-27 17:06:37,709 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1026 places, 2490 transitions, 128466 flow, removed 200 selfloop flow, removed 39 redundant places. [2024-06-27 17:06:37,796 INFO L231 Difference]: Finished difference. Result has 1042 places, 2365 transitions, 127143 flow [2024-06-27 17:06:37,797 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=116904, PETRI_DIFFERENCE_MINUEND_PLACES=978, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2283, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1483, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=771, PETRI_DIFFERENCE_SUBTRAHEND_STATES=49, PETRI_FLOW=127143, PETRI_PLACES=1042, PETRI_TRANSITIONS=2365} [2024-06-27 17:06:37,798 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 1019 predicate places. [2024-06-27 17:06:37,798 INFO L495 AbstractCegarLoop]: Abstraction has has 1042 places, 2365 transitions, 127143 flow [2024-06-27 17:06:37,798 INFO L496 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) [2024-06-27 17:06:37,798 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:06:37,799 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:06:37,809 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2024-06-27 17:06:37,999 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2024-06-27 17:06:37,999 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-06-27 17:06:37,999 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:06:38,000 INFO L85 PathProgramCache]: Analyzing trace with hash -1128608643, now seen corresponding path program 25 times [2024-06-27 17:06:38,000 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:06:38,000 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1841178221] [2024-06-27 17:06:38,000 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:06:38,000 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:06:38,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:06:38,194 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:06:38,194 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:06:38,194 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1841178221] [2024-06-27 17:06:38,194 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1841178221] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 17:06:38,195 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1311201095] [2024-06-27 17:06:38,195 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-06-27 17:06:38,195 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 17:06:38,195 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 17:06:38,196 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-06-27 17:06:38,198 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2024-06-27 17:06:38,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:06:38,251 INFO L262 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 18 conjunts are in the unsatisfiable core [2024-06-27 17:06:38,251 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 17:06:38,493 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:06:38,493 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 17:06:38,879 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:06:38,879 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1311201095] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 17:06:38,879 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 17:06:38,879 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 33 [2024-06-27 17:06:38,879 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1506174699] [2024-06-27 17:06:38,879 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 17:06:38,880 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2024-06-27 17:06:38,880 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:06:38,880 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2024-06-27 17:06:38,880 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=201, Invalid=921, Unknown=0, NotChecked=0, Total=1122 [2024-06-27 17:06:38,899 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 21 [2024-06-27 17:06:38,899 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1042 places, 2365 transitions, 127143 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) [2024-06-27 17:06:38,899 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:06:38,899 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 21 [2024-06-27 17:06:38,899 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:06:50,051 INFO L124 PetriNetUnfolderBase]: 4962/8964 cut-off events. [2024-06-27 17:06:50,051 INFO L125 PetriNetUnfolderBase]: For 1150688/1150688 co-relation queries the response was YES. [2024-06-27 17:06:50,204 INFO L83 FinitePrefix]: Finished finitePrefix Result has 192397 conditions, 8964 events. 4962/8964 cut-off events. For 1150688/1150688 co-relation queries the response was YES. Maximal size of possible extension queue 557. Compared 66710 event pairs, 133 based on Foata normal form. 11/8975 useless extension candidates. Maximal degree in co-relation 191787. Up to 3925 conditions per place. [2024-06-27 17:06:50,280 INFO L140 encePairwiseOnDemand]: 9/21 looper letters, 936 selfloop transitions, 1651 changer transitions 33/2621 dead transitions. [2024-06-27 17:06:50,280 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1112 places, 2621 transitions, 140682 flow [2024-06-27 17:06:50,280 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2024-06-27 17:06:50,280 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2024-06-27 17:06:50,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 659 transitions. [2024-06-27 17:06:50,281 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38741916519694297 [2024-06-27 17:06:50,281 INFO L175 Difference]: Start difference. First operand has 1042 places, 2365 transitions, 127143 flow. Second operand 81 states and 659 transitions. [2024-06-27 17:06:50,282 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1112 places, 2621 transitions, 140682 flow