./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/weaver/popl20-nonblocking-cntr.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.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 fe7fc3189e39cd6587b4d7d83621bd29f6e1c085e1b3af197b9abc1746b629ea --- Real Ultimate output --- This is Ultimate 0.2.4-tmp.fs.goblint-validation-7724a2d-m [2024-06-27 17:02:47,323 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-06-27 17:02:47,404 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-06-27 17:02:47,410 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-06-27 17:02:47,411 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-06-27 17:02:47,446 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-06-27 17:02:47,446 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-06-27 17:02:47,447 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-06-27 17:02:47,447 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-06-27 17:02:47,451 INFO L153 SettingsManager]: * Use memory slicer=true [2024-06-27 17:02:47,452 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-06-27 17:02:47,452 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-06-27 17:02:47,453 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-06-27 17:02:47,454 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-06-27 17:02:47,454 INFO L153 SettingsManager]: * Use SBE=true [2024-06-27 17:02:47,454 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-06-27 17:02:47,455 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-06-27 17:02:47,455 INFO L153 SettingsManager]: * sizeof long=4 [2024-06-27 17:02:47,455 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-06-27 17:02:47,455 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-06-27 17:02:47,456 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-06-27 17:02:47,456 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-06-27 17:02:47,456 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-06-27 17:02:47,457 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-06-27 17:02:47,457 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-06-27 17:02:47,457 INFO L153 SettingsManager]: * sizeof long double=12 [2024-06-27 17:02:47,457 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-06-27 17:02:47,458 INFO L153 SettingsManager]: * Use constant arrays=true [2024-06-27 17:02:47,458 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-06-27 17:02:47,458 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-06-27 17:02:47,459 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-06-27 17:02:47,460 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-06-27 17:02:47,460 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-27 17:02:47,460 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-06-27 17:02:47,460 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-06-27 17:02:47,460 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-06-27 17:02:47,461 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-06-27 17:02:47,461 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-06-27 17:02:47,461 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-06-27 17:02:47,461 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-06-27 17:02:47,461 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-06-27 17:02:47,462 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-06-27 17:02:47,462 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-06-27 17:02:47,462 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> fe7fc3189e39cd6587b4d7d83621bd29f6e1c085e1b3af197b9abc1746b629ea [2024-06-27 17:02:47,736 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-06-27 17:02:47,768 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-06-27 17:02:47,771 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-06-27 17:02:47,772 INFO L270 PluginConnector]: Initializing CDTParser... [2024-06-27 17:02:47,772 INFO L274 PluginConnector]: CDTParser initialized [2024-06-27 17:02:47,774 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/popl20-nonblocking-cntr.wvr.c [2024-06-27 17:02:49,029 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-06-27 17:02:49,254 INFO L384 CDTParser]: Found 1 translation units. [2024-06-27 17:02:49,254 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-nonblocking-cntr.wvr.c [2024-06-27 17:02:49,262 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b0c3d6cbd/7e15f6e719304c44a550b383ef9280aa/FLAG8354664ba [2024-06-27 17:02:49,275 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b0c3d6cbd/7e15f6e719304c44a550b383ef9280aa [2024-06-27 17:02:49,277 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-06-27 17:02:49,278 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-06-27 17:02:49,279 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-06-27 17:02:49,279 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-06-27 17:02:49,284 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-06-27 17:02:49,285 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.06 05:02:49" (1/1) ... [2024-06-27 17:02:49,286 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@71fd41ae and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 05:02:49, skipping insertion in model container [2024-06-27 17:02:49,286 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.06 05:02:49" (1/1) ... [2024-06-27 17:02:49,307 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-06-27 17:02:49,499 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.wvr.c[2063,2076] [2024-06-27 17:02:49,504 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-27 17:02:49,512 INFO L202 MainTranslator]: Completed pre-run [2024-06-27 17:02:49,526 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.wvr.c[2063,2076] [2024-06-27 17:02:49,527 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-27 17:02:49,541 INFO L206 MainTranslator]: Completed translation [2024-06-27 17:02:49,542 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 05:02:49 WrapperNode [2024-06-27 17:02:49,542 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-06-27 17:02:49,543 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-06-27 17:02:49,543 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-06-27 17:02:49,543 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-06-27 17:02:49,549 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 05:02:49" (1/1) ... [2024-06-27 17:02:49,555 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 05:02:49" (1/1) ... [2024-06-27 17:02:49,570 INFO L138 Inliner]: procedures = 20, calls = 14, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 41 [2024-06-27 17:02:49,570 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-06-27 17:02:49,571 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-06-27 17:02:49,571 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-06-27 17:02:49,571 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-06-27 17:02:49,580 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 05:02:49" (1/1) ... [2024-06-27 17:02:49,580 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 05:02:49" (1/1) ... [2024-06-27 17:02:49,582 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 05:02:49" (1/1) ... [2024-06-27 17:02:49,592 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 17:02:49,593 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 05:02:49" (1/1) ... [2024-06-27 17:02:49,593 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 05:02:49" (1/1) ... [2024-06-27 17:02:49,596 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 05:02:49" (1/1) ... [2024-06-27 17:02:49,599 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 05:02:49" (1/1) ... [2024-06-27 17:02:49,599 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 05:02:49" (1/1) ... [2024-06-27 17:02:49,600 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 05:02:49" (1/1) ... [2024-06-27 17:02:49,602 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-06-27 17:02:49,602 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-06-27 17:02:49,603 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-06-27 17:02:49,603 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-06-27 17:02:49,603 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 05:02:49" (1/1) ... [2024-06-27 17:02:49,608 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-27 17:02:49,618 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 17:02:49,637 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 17:02:49,653 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 17:02:49,692 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-06-27 17:02:49,692 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2024-06-27 17:02:49,692 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2024-06-27 17:02:49,692 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2024-06-27 17:02:49,692 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2024-06-27 17:02:49,693 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-06-27 17:02:49,693 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-06-27 17:02:49,694 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-06-27 17:02:49,695 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-06-27 17:02:49,695 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-06-27 17:02:49,696 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 17:02:49,776 INFO L244 CfgBuilder]: Building ICFG [2024-06-27 17:02:49,778 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-06-27 17:02:49,959 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-06-27 17:02:49,959 INFO L293 CfgBuilder]: Performing block encoding [2024-06-27 17:02:50,094 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-06-27 17:02:50,094 INFO L320 CfgBuilder]: Removed 2 assume(true) statements. [2024-06-27 17:02:50,095 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.06 05:02:50 BoogieIcfgContainer [2024-06-27 17:02:50,095 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-06-27 17:02:50,098 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-06-27 17:02:50,099 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-06-27 17:02:50,102 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-06-27 17:02:50,102 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.06 05:02:49" (1/3) ... [2024-06-27 17:02:50,103 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@49e8e452 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.06 05:02:50, skipping insertion in model container [2024-06-27 17:02:50,104 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 05:02:49" (2/3) ... [2024-06-27 17:02:50,105 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@49e8e452 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.06 05:02:50, skipping insertion in model container [2024-06-27 17:02:50,105 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.06 05:02:50" (3/3) ... [2024-06-27 17:02:50,107 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-nonblocking-cntr.wvr.c [2024-06-27 17:02:50,116 WARN L146 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2024-06-27 17:02:50,124 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-06-27 17:02:50,124 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-06-27 17:02:50,125 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-06-27 17:02:50,159 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2024-06-27 17:02:50,185 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 26 places, 21 transitions, 56 flow [2024-06-27 17:02:50,205 INFO L124 PetriNetUnfolderBase]: 2/19 cut-off events. [2024-06-27 17:02:50,206 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-06-27 17:02:50,208 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 17:02:50,208 INFO L82 GeneralOperation]: Start removeDead. Operand has 26 places, 21 transitions, 56 flow [2024-06-27 17:02:50,211 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 23 places, 18 transitions, 48 flow [2024-06-27 17:02:50,220 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-27 17:02:50,226 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;@79ef7d5f, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-27 17:02:50,226 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2024-06-27 17:02:50,235 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-27 17:02:50,235 INFO L124 PetriNetUnfolderBase]: 2/17 cut-off events. [2024-06-27 17:02:50,235 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-06-27 17:02:50,235 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:02:50,236 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:02:50,236 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 17:02:50,241 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:02:50,241 INFO L85 PathProgramCache]: Analyzing trace with hash -724561697, now seen corresponding path program 1 times [2024-06-27 17:02:50,249 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:02:50,249 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1074171022] [2024-06-27 17:02:50,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:02:50,250 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:02:50,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:02:50,489 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 17:02:50,490 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:02:50,490 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1074171022] [2024-06-27 17:02:50,491 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1074171022] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:02:50,491 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:02:50,491 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-27 17:02:50,492 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1475637529] [2024-06-27 17:02:50,493 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:02:50,515 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-27 17:02:50,520 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:02:50,577 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-27 17:02:50,578 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-06-27 17:02:50,588 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 21 [2024-06-27 17:02:50,590 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 17:02:50,590 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:02:50,591 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 21 [2024-06-27 17:02:50,591 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:02:50,656 INFO L124 PetriNetUnfolderBase]: 70/138 cut-off events. [2024-06-27 17:02:50,656 INFO L125 PetriNetUnfolderBase]: For 9/9 co-relation queries the response was YES. [2024-06-27 17:02:50,657 INFO L83 FinitePrefix]: Finished finitePrefix Result has 284 conditions, 138 events. 70/138 cut-off events. For 9/9 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 418 event pairs, 31 based on Foata normal form. 8/142 useless extension candidates. Maximal degree in co-relation 253. Up to 86 conditions per place. [2024-06-27 17:02:50,660 INFO L140 encePairwiseOnDemand]: 17/21 looper letters, 20 selfloop transitions, 3 changer transitions 0/26 dead transitions. [2024-06-27 17:02:50,660 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 26 places, 26 transitions, 113 flow [2024-06-27 17:02:50,664 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-27 17:02:50,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-27 17:02:50,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 44 transitions. [2024-06-27 17:02:50,673 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5238095238095238 [2024-06-27 17:02:50,674 INFO L175 Difference]: Start difference. First operand has 23 places, 18 transitions, 48 flow. Second operand 4 states and 44 transitions. [2024-06-27 17:02:50,675 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 26 places, 26 transitions, 113 flow [2024-06-27 17:02:50,677 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 22 places, 26 transitions, 103 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-06-27 17:02:50,679 INFO L231 Difference]: Finished difference. Result has 23 places, 19 transitions, 54 flow [2024-06-27 17:02:50,681 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 17:02:50,683 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 0 predicate places. [2024-06-27 17:02:50,684 INFO L495 AbstractCegarLoop]: Abstraction has has 23 places, 19 transitions, 54 flow [2024-06-27 17:02:50,684 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 17:02:50,684 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:02:50,684 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:02:50,685 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-06-27 17:02:50,685 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 17:02:50,685 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:02:50,686 INFO L85 PathProgramCache]: Analyzing trace with hash -332040435, now seen corresponding path program 1 times [2024-06-27 17:02:50,686 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:02:50,686 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [539154406] [2024-06-27 17:02:50,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:02:50,687 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 17:02:50,795 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:02:50,796 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:02:50,796 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [539154406] [2024-06-27 17:02:50,796 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [539154406] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:02:50,796 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:02:50,797 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-27 17:02:50,797 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [441487777] [2024-06-27 17:02:50,797 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:02:50,798 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-27 17:02:50,798 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:02:50,799 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-27 17:02:50,799 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-06-27 17:02:50,806 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 21 [2024-06-27 17:02:50,806 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 23 places, 19 transitions, 54 flow. Second operand has 4 states, 4 states have (on average 8.5) internal successors, (34), 4 states have internal predecessors, (34), 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 17:02:50,806 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:02:50,806 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 21 [2024-06-27 17:02:50,806 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:02:50,865 INFO L124 PetriNetUnfolderBase]: 89/180 cut-off events. [2024-06-27 17:02:50,865 INFO L125 PetriNetUnfolderBase]: For 47/47 co-relation queries the response was YES. [2024-06-27 17:02:50,866 INFO L83 FinitePrefix]: Finished finitePrefix Result has 398 conditions, 180 events. 89/180 cut-off events. For 47/47 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 623 event pairs, 49 based on Foata normal form. 13/188 useless extension candidates. Maximal degree in co-relation 87. Up to 124 conditions per place. [2024-06-27 17:02:50,868 INFO L140 encePairwiseOnDemand]: 17/21 looper letters, 21 selfloop transitions, 3 changer transitions 0/27 dead transitions. [2024-06-27 17:02:50,868 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 26 places, 27 transitions, 129 flow [2024-06-27 17:02:50,868 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-27 17:02:50,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-27 17:02:50,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 43 transitions. [2024-06-27 17:02:50,869 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5119047619047619 [2024-06-27 17:02:50,869 INFO L175 Difference]: Start difference. First operand has 23 places, 19 transitions, 54 flow. Second operand 4 states and 43 transitions. [2024-06-27 17:02:50,869 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 26 places, 27 transitions, 129 flow [2024-06-27 17:02:50,870 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 24 places, 27 transitions, 123 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-06-27 17:02:50,871 INFO L231 Difference]: Finished difference. Result has 25 places, 20 transitions, 64 flow [2024-06-27 17:02:50,871 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 17:02:50,872 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 2 predicate places. [2024-06-27 17:02:50,872 INFO L495 AbstractCegarLoop]: Abstraction has has 25 places, 20 transitions, 64 flow [2024-06-27 17:02:50,872 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 8.5) internal successors, (34), 4 states have internal predecessors, (34), 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 17:02:50,872 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:02:50,872 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 17:02:50,872 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-06-27 17:02:50,873 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 17:02:50,873 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:02:50,873 INFO L85 PathProgramCache]: Analyzing trace with hash -585986627, now seen corresponding path program 1 times [2024-06-27 17:02:50,873 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:02:50,874 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [87456418] [2024-06-27 17:02:50,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:02:50,874 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:02:50,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:02:51,087 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-06-27 17:02:51,088 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:02:51,089 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [87456418] [2024-06-27 17:02:51,090 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [87456418] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 17:02:51,090 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2004468512] [2024-06-27 17:02:51,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:02:51,091 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 17:02:51,091 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 17:02:51,096 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 17:02:51,122 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 17:02:51,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:02:51,176 INFO L262 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 6 conjunts are in the unsatisfiable core [2024-06-27 17:02:51,181 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 17:02:51,257 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-06-27 17:02:51,258 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 17:02:51,531 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:02:51,531 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2004468512] provided 1 perfect and 1 imperfect interpolant sequences [2024-06-27 17:02:51,531 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-06-27 17:02:51,531 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [3, 3] total 5 [2024-06-27 17:02:51,532 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [582727418] [2024-06-27 17:02:51,532 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:02:51,532 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-27 17:02:51,532 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:02:51,533 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-27 17:02:51,533 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-27 17:02:51,533 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 21 [2024-06-27 17:02:51,533 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 25 places, 20 transitions, 64 flow. Second operand has 5 states, 5 states have (on average 8.0) internal successors, (40), 5 states have internal predecessors, (40), 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 17:02:51,533 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:02:51,533 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 21 [2024-06-27 17:02:51,533 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:02:51,701 INFO L124 PetriNetUnfolderBase]: 153/301 cut-off events. [2024-06-27 17:02:51,702 INFO L125 PetriNetUnfolderBase]: For 141/141 co-relation queries the response was YES. [2024-06-27 17:02:51,705 INFO L83 FinitePrefix]: Finished finitePrefix Result has 763 conditions, 301 events. 153/301 cut-off events. For 141/141 co-relation queries the response was YES. Maximal size of possible extension queue 23. Compared 1135 event pairs, 23 based on Foata normal form. 1/293 useless extension candidates. Maximal degree in co-relation 236. Up to 97 conditions per place. [2024-06-27 17:02:51,709 INFO L140 encePairwiseOnDemand]: 17/21 looper letters, 35 selfloop transitions, 5 changer transitions 3/46 dead transitions. [2024-06-27 17:02:51,709 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 28 places, 46 transitions, 238 flow [2024-06-27 17:02:51,710 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-27 17:02:51,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-27 17:02:51,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 59 transitions. [2024-06-27 17:02:51,713 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7023809523809523 [2024-06-27 17:02:51,713 INFO L175 Difference]: Start difference. First operand has 25 places, 20 transitions, 64 flow. Second operand 4 states and 59 transitions. [2024-06-27 17:02:51,714 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 28 places, 46 transitions, 238 flow [2024-06-27 17:02:51,717 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 26 places, 46 transitions, 230 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-06-27 17:02:51,720 INFO L231 Difference]: Finished difference. Result has 28 places, 24 transitions, 98 flow [2024-06-27 17:02:51,720 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=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=16, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=98, PETRI_PLACES=28, PETRI_TRANSITIONS=24} [2024-06-27 17:02:51,721 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 5 predicate places. [2024-06-27 17:02:51,722 INFO L495 AbstractCegarLoop]: Abstraction has has 28 places, 24 transitions, 98 flow [2024-06-27 17:02:51,722 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 8.0) internal successors, (40), 5 states have internal predecessors, (40), 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 17:02:51,722 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:02:51,722 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 17:02:51,739 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 17:02:51,936 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 17:02:51,936 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 17:02:51,938 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:02:51,938 INFO L85 PathProgramCache]: Analyzing trace with hash -859289679, now seen corresponding path program 2 times [2024-06-27 17:02:51,939 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:02:51,939 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [785593473] [2024-06-27 17:02:51,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:02:51,942 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:02:51,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:02:52,074 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:02:52,075 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:02:52,075 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [785593473] [2024-06-27 17:02:52,076 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [785593473] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 17:02:52,076 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1889913493] [2024-06-27 17:02:52,077 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-06-27 17:02:52,077 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 17:02:52,077 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 17:02:52,078 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 17:02:52,098 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 17:02:52,130 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-06-27 17:02:52,130 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 17:02:52,131 INFO L262 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 5 conjunts are in the unsatisfiable core [2024-06-27 17:02:52,132 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 17:02:52,221 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:02:52,222 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 17:02:52,382 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:02:52,383 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1889913493] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 17:02:52,383 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 17:02:52,383 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 9 [2024-06-27 17:02:52,384 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [826496610] [2024-06-27 17:02:52,384 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 17:02:52,385 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 17:02:52,387 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:02:52,388 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 17:02:52,388 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2024-06-27 17:02:52,402 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 21 [2024-06-27 17:02:52,404 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 28 places, 24 transitions, 98 flow. Second operand has 10 states, 10 states have (on average 7.4) internal successors, (74), 10 states have internal predecessors, (74), 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 17:02:52,404 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:02:52,404 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 21 [2024-06-27 17:02:52,405 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:02:52,556 INFO L124 PetriNetUnfolderBase]: 286/530 cut-off events. [2024-06-27 17:02:52,556 INFO L125 PetriNetUnfolderBase]: For 368/368 co-relation queries the response was YES. [2024-06-27 17:02:52,558 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1479 conditions, 530 events. 286/530 cut-off events. For 368/368 co-relation queries the response was YES. Maximal size of possible extension queue 33. Compared 2168 event pairs, 42 based on Foata normal form. 18/547 useless extension candidates. Maximal degree in co-relation 507. Up to 242 conditions per place. [2024-06-27 17:02:52,562 INFO L140 encePairwiseOnDemand]: 15/21 looper letters, 40 selfloop transitions, 13 changer transitions 0/55 dead transitions. [2024-06-27 17:02:52,562 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 33 places, 55 transitions, 335 flow [2024-06-27 17:02:52,562 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 17:02:52,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 17:02:52,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 64 transitions. [2024-06-27 17:02:52,565 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5079365079365079 [2024-06-27 17:02:52,565 INFO L175 Difference]: Start difference. First operand has 28 places, 24 transitions, 98 flow. Second operand 6 states and 64 transitions. [2024-06-27 17:02:52,565 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 33 places, 55 transitions, 335 flow [2024-06-27 17:02:52,568 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 33 places, 55 transitions, 335 flow, removed 0 selfloop flow, removed 0 redundant places. [2024-06-27 17:02:52,570 INFO L231 Difference]: Finished difference. Result has 37 places, 34 transitions, 219 flow [2024-06-27 17:02:52,570 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=98, PETRI_DIFFERENCE_MINUEND_PLACES=28, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=24, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=16, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=219, PETRI_PLACES=37, PETRI_TRANSITIONS=34} [2024-06-27 17:02:52,571 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 14 predicate places. [2024-06-27 17:02:52,572 INFO L495 AbstractCegarLoop]: Abstraction has has 37 places, 34 transitions, 219 flow [2024-06-27 17:02:52,572 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.4) internal successors, (74), 10 states have internal predecessors, (74), 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 17:02:52,572 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:02:52,572 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 17:02:52,591 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 17:02:52,780 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 17:02:52,781 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 17:02:52,781 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:02:52,781 INFO L85 PathProgramCache]: Analyzing trace with hash -1514086461, now seen corresponding path program 3 times [2024-06-27 17:02:52,781 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:02:52,781 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [570498546] [2024-06-27 17:02:52,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:02:52,782 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:02:52,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:02:52,950 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 17:02:52,950 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:02:52,950 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [570498546] [2024-06-27 17:02:52,950 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [570498546] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 17:02:52,951 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [784745796] [2024-06-27 17:02:52,951 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-06-27 17:02:52,951 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 17:02:52,951 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 17:02:52,952 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 17:02:52,969 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 17:02:53,005 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-06-27 17:02:53,008 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 17:02:53,010 INFO L262 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 7 conjunts are in the unsatisfiable core [2024-06-27 17:02:53,012 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 17:02:53,149 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:02:53,149 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 17:02:53,274 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:02:53,275 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [784745796] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 17:02:53,275 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 17:02:53,276 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 7] total 19 [2024-06-27 17:02:53,276 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1416363500] [2024-06-27 17:02:53,276 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 17:02:53,277 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-06-27 17:02:53,278 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:02:53,278 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-06-27 17:02:53,279 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=260, Unknown=0, NotChecked=0, Total=342 [2024-06-27 17:02:53,291 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 21 [2024-06-27 17:02:53,292 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 37 places, 34 transitions, 219 flow. Second operand has 19 states, 19 states have (on average 5.684210526315789) internal successors, (108), 19 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:02:53,292 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:02:53,292 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 21 [2024-06-27 17:02:53,292 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:02:54,036 INFO L124 PetriNetUnfolderBase]: 643/1108 cut-off events. [2024-06-27 17:02:54,037 INFO L125 PetriNetUnfolderBase]: For 1935/1935 co-relation queries the response was YES. [2024-06-27 17:02:54,039 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3765 conditions, 1108 events. 643/1108 cut-off events. For 1935/1935 co-relation queries the response was YES. Maximal size of possible extension queue 54. Compared 4887 event pairs, 20 based on Foata normal form. 38/1146 useless extension candidates. Maximal degree in co-relation 2620. Up to 229 conditions per place. [2024-06-27 17:02:54,045 INFO L140 encePairwiseOnDemand]: 11/21 looper letters, 140 selfloop transitions, 81 changer transitions 22/244 dead transitions. [2024-06-27 17:02:54,046 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 244 transitions, 1705 flow [2024-06-27 17:02:54,046 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2024-06-27 17:02:54,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2024-06-27 17:02:54,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 330 transitions. [2024-06-27 17:02:54,050 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40293040293040294 [2024-06-27 17:02:54,050 INFO L175 Difference]: Start difference. First operand has 37 places, 34 transitions, 219 flow. Second operand 39 states and 330 transitions. [2024-06-27 17:02:54,050 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 244 transitions, 1705 flow [2024-06-27 17:02:54,056 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 244 transitions, 1697 flow, removed 4 selfloop flow, removed 0 redundant places. [2024-06-27 17:02:54,059 INFO L231 Difference]: Finished difference. Result has 95 places, 99 transitions, 966 flow [2024-06-27 17:02:54,060 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=215, PETRI_DIFFERENCE_MINUEND_PLACES=37, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=34, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=14, PETRI_DIFFERENCE_SUBTRAHEND_STATES=39, PETRI_FLOW=966, PETRI_PLACES=95, PETRI_TRANSITIONS=99} [2024-06-27 17:02:54,061 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 72 predicate places. [2024-06-27 17:02:54,061 INFO L495 AbstractCegarLoop]: Abstraction has has 95 places, 99 transitions, 966 flow [2024-06-27 17:02:54,061 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 5.684210526315789) internal successors, (108), 19 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:02:54,061 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:02:54,061 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 17:02:54,082 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-06-27 17:02:54,283 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 17:02:54,283 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 17:02:54,284 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:02:54,284 INFO L85 PathProgramCache]: Analyzing trace with hash 770529667, now seen corresponding path program 4 times [2024-06-27 17:02:54,284 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:02:54,284 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1804318872] [2024-06-27 17:02:54,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:02:54,285 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:02:54,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:02:54,420 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:02:54,421 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:02:54,421 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1804318872] [2024-06-27 17:02:54,421 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1804318872] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 17:02:54,421 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1423052256] [2024-06-27 17:02:54,421 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-06-27 17:02:54,422 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 17:02:54,422 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 17:02:54,423 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 17:02:54,438 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 17:02:54,467 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-06-27 17:02:54,467 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 17:02:54,467 INFO L262 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 6 conjunts are in the unsatisfiable core [2024-06-27 17:02:54,469 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 17:02:54,561 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:02:54,562 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 17:02:54,633 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:02:54,634 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1423052256] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 17:02:54,634 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 17:02:54,634 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 7] total 17 [2024-06-27 17:02:54,634 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [81646180] [2024-06-27 17:02:54,635 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 17:02:54,635 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-06-27 17:02:54,635 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:02:54,636 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-06-27 17:02:54,636 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2024-06-27 17:02:54,660 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 21 [2024-06-27 17:02:54,661 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 95 places, 99 transitions, 966 flow. Second operand has 17 states, 17 states have (on average 5.470588235294118) internal successors, (93), 17 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:02:54,661 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:02:54,661 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 21 [2024-06-27 17:02:54,661 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:02:55,406 INFO L124 PetriNetUnfolderBase]: 1021/1737 cut-off events. [2024-06-27 17:02:55,407 INFO L125 PetriNetUnfolderBase]: For 18636/18636 co-relation queries the response was YES. [2024-06-27 17:02:55,415 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9455 conditions, 1737 events. 1021/1737 cut-off events. For 18636/18636 co-relation queries the response was YES. Maximal size of possible extension queue 93. Compared 8429 event pairs, 28 based on Foata normal form. 87/1824 useless extension candidates. Maximal degree in co-relation 8431. Up to 328 conditions per place. [2024-06-27 17:02:55,426 INFO L140 encePairwiseOnDemand]: 11/21 looper letters, 147 selfloop transitions, 158 changer transitions 3/309 dead transitions. [2024-06-27 17:02:55,426 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 120 places, 309 transitions, 3418 flow [2024-06-27 17:02:55,427 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2024-06-27 17:02:55,427 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2024-06-27 17:02:55,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 249 transitions. [2024-06-27 17:02:55,429 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42346938775510207 [2024-06-27 17:02:55,429 INFO L175 Difference]: Start difference. First operand has 95 places, 99 transitions, 966 flow. Second operand 28 states and 249 transitions. [2024-06-27 17:02:55,430 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 120 places, 309 transitions, 3418 flow [2024-06-27 17:02:55,461 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 116 places, 309 transitions, 3195 flow, removed 105 selfloop flow, removed 4 redundant places. [2024-06-27 17:02:55,474 INFO L231 Difference]: Finished difference. Result has 135 places, 196 transitions, 2416 flow [2024-06-27 17:02:55,474 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=877, PETRI_DIFFERENCE_MINUEND_PLACES=89, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=99, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=61, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=28, PETRI_FLOW=2416, PETRI_PLACES=135, PETRI_TRANSITIONS=196} [2024-06-27 17:02:55,477 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 112 predicate places. [2024-06-27 17:02:55,477 INFO L495 AbstractCegarLoop]: Abstraction has has 135 places, 196 transitions, 2416 flow [2024-06-27 17:02:55,477 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 5.470588235294118) internal successors, (93), 17 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:02:55,478 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:02:55,478 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 17:02:55,493 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 17:02:55,692 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 17:02:55,693 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 17:02:55,693 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:02:55,693 INFO L85 PathProgramCache]: Analyzing trace with hash -580098091, now seen corresponding path program 5 times [2024-06-27 17:02:55,693 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:02:55,693 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1373917849] [2024-06-27 17:02:55,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:02:55,693 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:02:55,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:02:55,812 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:02:55,813 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:02:55,813 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1373917849] [2024-06-27 17:02:55,813 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1373917849] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 17:02:55,813 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [112833545] [2024-06-27 17:02:55,813 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-06-27 17:02:55,813 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 17:02:55,814 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 17:02:55,815 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 17:02:55,830 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 17:02:55,861 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2024-06-27 17:02:55,862 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 17:02:55,862 INFO L262 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 8 conjunts are in the unsatisfiable core [2024-06-27 17:02:55,864 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 17:02:55,953 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:02:55,953 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 17:02:56,099 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:02:56,100 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [112833545] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 17:02:56,102 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 17:02:56,102 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 19 [2024-06-27 17:02:56,102 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1295621101] [2024-06-27 17:02:56,103 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 17:02:56,104 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-06-27 17:02:56,104 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:02:56,105 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-06-27 17:02:56,105 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=252, Unknown=0, NotChecked=0, Total=342 [2024-06-27 17:02:56,118 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 21 [2024-06-27 17:02:56,119 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 135 places, 196 transitions, 2416 flow. Second operand has 19 states, 19 states have (on average 5.421052631578948) internal successors, (103), 19 states have internal predecessors, (103), 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 17:02:56,119 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:02:56,119 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 21 [2024-06-27 17:02:56,119 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:02:57,522 INFO L124 PetriNetUnfolderBase]: 1806/3067 cut-off events. [2024-06-27 17:02:57,523 INFO L125 PetriNetUnfolderBase]: For 64642/64642 co-relation queries the response was YES. [2024-06-27 17:02:57,539 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20851 conditions, 3067 events. 1806/3067 cut-off events. For 64642/64642 co-relation queries the response was YES. Maximal size of possible extension queue 137. Compared 16471 event pairs, 14 based on Foata normal form. 85/3152 useless extension candidates. Maximal degree in co-relation 17157. Up to 577 conditions per place. [2024-06-27 17:02:57,564 INFO L140 encePairwiseOnDemand]: 11/21 looper letters, 205 selfloop transitions, 342 changer transitions 2/550 dead transitions. [2024-06-27 17:02:57,564 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 183 places, 550 transitions, 7648 flow [2024-06-27 17:02:57,565 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2024-06-27 17:02:57,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2024-06-27 17:02:57,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 409 transitions. [2024-06-27 17:02:57,569 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3974732750242954 [2024-06-27 17:02:57,569 INFO L175 Difference]: Start difference. First operand has 135 places, 196 transitions, 2416 flow. Second operand 49 states and 409 transitions. [2024-06-27 17:02:57,569 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 183 places, 550 transitions, 7648 flow [2024-06-27 17:02:57,764 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 181 places, 550 transitions, 7387 flow, removed 125 selfloop flow, removed 2 redundant places. [2024-06-27 17:02:57,773 INFO L231 Difference]: Finished difference. Result has 211 places, 406 transitions, 6160 flow [2024-06-27 17:02:57,773 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=2267, PETRI_DIFFERENCE_MINUEND_PLACES=133, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=196, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=151, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=49, PETRI_FLOW=6160, PETRI_PLACES=211, PETRI_TRANSITIONS=406} [2024-06-27 17:02:57,774 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 188 predicate places. [2024-06-27 17:02:57,774 INFO L495 AbstractCegarLoop]: Abstraction has has 211 places, 406 transitions, 6160 flow [2024-06-27 17:02:57,774 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 5.421052631578948) internal successors, (103), 19 states have internal predecessors, (103), 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 17:02:57,774 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:02:57,775 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 17:02:57,792 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 17:02:57,991 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 17:02:57,991 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 17:02:57,992 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:02:57,992 INFO L85 PathProgramCache]: Analyzing trace with hash -406850399, now seen corresponding path program 6 times [2024-06-27 17:02:57,992 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:02:57,993 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [316264504] [2024-06-27 17:02:57,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:02:57,993 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:02:58,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:02:58,121 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:02:58,123 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:02:58,123 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [316264504] [2024-06-27 17:02:58,123 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [316264504] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 17:02:58,125 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1113902525] [2024-06-27 17:02:58,125 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-06-27 17:02:58,125 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 17:02:58,125 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 17:02:58,127 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 17:02:58,130 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 17:02:58,173 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2024-06-27 17:02:58,173 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 17:02:58,174 INFO L262 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 8 conjunts are in the unsatisfiable core [2024-06-27 17:02:58,175 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 17:02:58,267 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:02:58,268 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 17:02:58,383 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:02:58,384 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1113902525] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 17:02:58,384 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 17:02:58,384 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 19 [2024-06-27 17:02:58,384 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1491254802] [2024-06-27 17:02:58,385 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 17:02:58,385 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-06-27 17:02:58,385 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:02:58,386 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-06-27 17:02:58,386 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=249, Unknown=0, NotChecked=0, Total=342 [2024-06-27 17:02:58,412 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 21 [2024-06-27 17:02:58,413 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 211 places, 406 transitions, 6160 flow. Second operand has 19 states, 19 states have (on average 5.421052631578948) internal successors, (103), 19 states have internal predecessors, (103), 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 17:02:58,413 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:02:58,413 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 21 [2024-06-27 17:02:58,413 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:02:59,711 INFO L124 PetriNetUnfolderBase]: 1755/2934 cut-off events. [2024-06-27 17:02:59,712 INFO L125 PetriNetUnfolderBase]: For 102820/102820 co-relation queries the response was YES. [2024-06-27 17:02:59,733 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25804 conditions, 2934 events. 1755/2934 cut-off events. For 102820/102820 co-relation queries the response was YES. Maximal size of possible extension queue 129. Compared 15381 event pairs, 26 based on Foata normal form. 18/2952 useless extension candidates. Maximal degree in co-relation 24991. Up to 640 conditions per place. [2024-06-27 17:02:59,764 INFO L140 encePairwiseOnDemand]: 12/21 looper letters, 260 selfloop transitions, 251 changer transitions 2/514 dead transitions. [2024-06-27 17:02:59,765 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 237 places, 514 transitions, 9200 flow [2024-06-27 17:02:59,765 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2024-06-27 17:02:59,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2024-06-27 17:02:59,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 235 transitions. [2024-06-27 17:02:59,767 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4144620811287478 [2024-06-27 17:02:59,767 INFO L175 Difference]: Start difference. First operand has 211 places, 406 transitions, 6160 flow. Second operand 27 states and 235 transitions. [2024-06-27 17:02:59,767 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 237 places, 514 transitions, 9200 flow [2024-06-27 17:03:00,089 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 228 places, 514 transitions, 8547 flow, removed 303 selfloop flow, removed 9 redundant places. [2024-06-27 17:03:00,098 INFO L231 Difference]: Finished difference. Result has 237 places, 421 transitions, 6615 flow [2024-06-27 17:03:00,099 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=5583, PETRI_DIFFERENCE_MINUEND_PLACES=202, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=406, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=236, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=169, PETRI_DIFFERENCE_SUBTRAHEND_STATES=27, PETRI_FLOW=6615, PETRI_PLACES=237, PETRI_TRANSITIONS=421} [2024-06-27 17:03:00,101 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 214 predicate places. [2024-06-27 17:03:00,101 INFO L495 AbstractCegarLoop]: Abstraction has has 237 places, 421 transitions, 6615 flow [2024-06-27 17:03:00,101 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 5.421052631578948) internal successors, (103), 19 states have internal predecessors, (103), 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 17:03:00,102 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:03:00,102 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 17:03:00,120 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 17:03:00,317 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 17:03:00,317 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 17:03:00,318 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:03:00,318 INFO L85 PathProgramCache]: Analyzing trace with hash 1453803489, now seen corresponding path program 7 times [2024-06-27 17:03:00,318 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:03:00,318 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1670999821] [2024-06-27 17:03:00,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:03:00,318 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:03:00,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:03:00,419 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:03:00,419 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:03:00,419 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1670999821] [2024-06-27 17:03:00,419 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1670999821] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 17:03:00,419 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1584839384] [2024-06-27 17:03:00,419 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-06-27 17:03:00,420 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 17:03:00,420 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 17:03:00,425 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 17:03:00,444 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 17:03:00,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:03:00,471 INFO L262 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 8 conjunts are in the unsatisfiable core [2024-06-27 17:03:00,473 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 17:03:00,575 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:03:00,576 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 17:03:00,752 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:03:00,753 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1584839384] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 17:03:00,753 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 17:03:00,753 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 21 [2024-06-27 17:03:00,753 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [426511911] [2024-06-27 17:03:00,753 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 17:03:00,754 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-06-27 17:03:00,754 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:03:00,754 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-06-27 17:03:00,755 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=322, Unknown=0, NotChecked=0, Total=420 [2024-06-27 17:03:00,781 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 21 [2024-06-27 17:03:00,782 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 237 places, 421 transitions, 6615 flow. Second operand has 21 states, 21 states have (on average 5.238095238095238) internal successors, (110), 21 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:03:00,782 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:03:00,782 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 21 [2024-06-27 17:03:00,782 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:03:02,311 INFO L124 PetriNetUnfolderBase]: 2132/3537 cut-off events. [2024-06-27 17:03:02,312 INFO L125 PetriNetUnfolderBase]: For 141258/141258 co-relation queries the response was YES. [2024-06-27 17:03:02,343 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31903 conditions, 3537 events. 2132/3537 cut-off events. For 141258/141258 co-relation queries the response was YES. Maximal size of possible extension queue 155. Compared 19216 event pairs, 41 based on Foata normal form. 16/3553 useless extension candidates. Maximal degree in co-relation 31326. Up to 712 conditions per place. [2024-06-27 17:03:02,368 INFO L140 encePairwiseOnDemand]: 12/21 looper letters, 305 selfloop transitions, 336 changer transitions 4/646 dead transitions. [2024-06-27 17:03:02,369 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 269 places, 646 transitions, 11544 flow [2024-06-27 17:03:02,369 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2024-06-27 17:03:02,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2024-06-27 17:03:02,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 275 transitions. [2024-06-27 17:03:02,371 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3851540616246499 [2024-06-27 17:03:02,371 INFO L175 Difference]: Start difference. First operand has 237 places, 421 transitions, 6615 flow. Second operand 34 states and 275 transitions. [2024-06-27 17:03:02,371 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 269 places, 646 transitions, 11544 flow [2024-06-27 17:03:02,804 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 252 places, 646 transitions, 10911 flow, removed 106 selfloop flow, removed 17 redundant places. [2024-06-27 17:03:02,815 INFO L231 Difference]: Finished difference. Result has 261 places, 514 transitions, 8621 flow [2024-06-27 17:03:02,816 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=6100, PETRI_DIFFERENCE_MINUEND_PLACES=219, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=421, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=251, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=164, PETRI_DIFFERENCE_SUBTRAHEND_STATES=34, PETRI_FLOW=8621, PETRI_PLACES=261, PETRI_TRANSITIONS=514} [2024-06-27 17:03:02,816 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 238 predicate places. [2024-06-27 17:03:02,817 INFO L495 AbstractCegarLoop]: Abstraction has has 261 places, 514 transitions, 8621 flow [2024-06-27 17:03:02,817 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 5.238095238095238) internal successors, (110), 21 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:03:02,817 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:03:02,817 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 17:03:02,834 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 17:03:03,032 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 17:03:03,032 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 17:03:03,033 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:03:03,033 INFO L85 PathProgramCache]: Analyzing trace with hash 742700219, now seen corresponding path program 8 times [2024-06-27 17:03:03,033 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:03:03,033 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1731929133] [2024-06-27 17:03:03,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:03:03,033 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:03:03,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:03:03,140 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:03:03,140 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:03:03,140 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1731929133] [2024-06-27 17:03:03,141 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1731929133] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 17:03:03,141 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [471561916] [2024-06-27 17:03:03,141 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-06-27 17:03:03,141 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 17:03:03,141 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 17:03:03,142 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 17:03:03,160 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 17:03:03,186 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-06-27 17:03:03,186 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 17:03:03,187 INFO L262 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 8 conjunts are in the unsatisfiable core [2024-06-27 17:03:03,188 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 17:03:03,288 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:03:03,289 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 17:03:03,403 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:03:03,404 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [471561916] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 17:03:03,404 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 17:03:03,404 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 20 [2024-06-27 17:03:03,404 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1313501271] [2024-06-27 17:03:03,405 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 17:03:03,405 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-06-27 17:03:03,406 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:03:03,407 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-06-27 17:03:03,407 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=286, Unknown=0, NotChecked=0, Total=380 [2024-06-27 17:03:03,428 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 21 [2024-06-27 17:03:03,430 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 261 places, 514 transitions, 8621 flow. Second operand has 20 states, 20 states have (on average 5.3) internal successors, (106), 20 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:03:03,430 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:03:03,431 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 21 [2024-06-27 17:03:03,431 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:03:05,443 INFO L124 PetriNetUnfolderBase]: 2803/4676 cut-off events. [2024-06-27 17:03:05,444 INFO L125 PetriNetUnfolderBase]: For 237970/237970 co-relation queries the response was YES. [2024-06-27 17:03:05,476 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43736 conditions, 4676 events. 2803/4676 cut-off events. For 237970/237970 co-relation queries the response was YES. Maximal size of possible extension queue 211. Compared 26798 event pairs, 37 based on Foata normal form. 83/4759 useless extension candidates. Maximal degree in co-relation 42860. Up to 862 conditions per place. [2024-06-27 17:03:05,522 INFO L140 encePairwiseOnDemand]: 11/21 looper letters, 246 selfloop transitions, 612 changer transitions 2/861 dead transitions. [2024-06-27 17:03:05,522 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 302 places, 861 transitions, 15915 flow [2024-06-27 17:03:05,523 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2024-06-27 17:03:05,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2024-06-27 17:03:05,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 379 transitions. [2024-06-27 17:03:05,526 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39233954451345754 [2024-06-27 17:03:05,526 INFO L175 Difference]: Start difference. First operand has 261 places, 514 transitions, 8621 flow. Second operand 46 states and 379 transitions. [2024-06-27 17:03:05,526 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 302 places, 861 transitions, 15915 flow [2024-06-27 17:03:06,637 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 290 places, 861 transitions, 14962 flow, removed 406 selfloop flow, removed 12 redundant places. [2024-06-27 17:03:06,649 INFO L231 Difference]: Finished difference. Result has 314 places, 728 transitions, 13966 flow [2024-06-27 17:03:06,650 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=7873, PETRI_DIFFERENCE_MINUEND_PLACES=245, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=508, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=410, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=46, PETRI_FLOW=13966, PETRI_PLACES=314, PETRI_TRANSITIONS=728} [2024-06-27 17:03:06,651 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 291 predicate places. [2024-06-27 17:03:06,651 INFO L495 AbstractCegarLoop]: Abstraction has has 314 places, 728 transitions, 13966 flow [2024-06-27 17:03:06,651 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 5.3) internal successors, (106), 20 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:03:06,651 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:03:06,651 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 17:03:06,663 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2024-06-27 17:03:06,852 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 17:03:06,852 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 17:03:06,853 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:03:06,853 INFO L85 PathProgramCache]: Analyzing trace with hash 915947911, now seen corresponding path program 9 times [2024-06-27 17:03:06,853 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:03:06,853 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [648841758] [2024-06-27 17:03:06,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:03:06,853 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:03:06,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:03:06,966 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:03:06,967 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:03:06,967 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [648841758] [2024-06-27 17:03:06,967 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [648841758] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 17:03:06,967 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [467888513] [2024-06-27 17:03:06,967 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-06-27 17:03:06,967 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 17:03:06,968 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 17:03:06,969 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 17:03:06,971 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 17:03:07,021 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2024-06-27 17:03:07,021 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 17:03:07,022 INFO L262 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 8 conjunts are in the unsatisfiable core [2024-06-27 17:03:07,024 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 17:03:07,126 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:03:07,126 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 17:03:07,245 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:03:07,246 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [467888513] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 17:03:07,246 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 17:03:07,246 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 20 [2024-06-27 17:03:07,247 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1053927023] [2024-06-27 17:03:07,247 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 17:03:07,248 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-06-27 17:03:07,249 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:03:07,249 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-06-27 17:03:07,250 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=284, Unknown=0, NotChecked=0, Total=380 [2024-06-27 17:03:07,271 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 21 [2024-06-27 17:03:07,272 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 314 places, 728 transitions, 13966 flow. Second operand has 20 states, 20 states have (on average 5.3) internal successors, (106), 20 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:03:07,272 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:03:07,272 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 21 [2024-06-27 17:03:07,272 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:03:09,124 INFO L124 PetriNetUnfolderBase]: 2798/4677 cut-off events. [2024-06-27 17:03:09,125 INFO L125 PetriNetUnfolderBase]: For 208320/208320 co-relation queries the response was YES. [2024-06-27 17:03:09,153 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46733 conditions, 4677 events. 2798/4677 cut-off events. For 208320/208320 co-relation queries the response was YES. Maximal size of possible extension queue 214. Compared 26866 event pairs, 69 based on Foata normal form. 18/4695 useless extension candidates. Maximal degree in co-relation 45712. Up to 991 conditions per place. [2024-06-27 17:03:09,181 INFO L140 encePairwiseOnDemand]: 12/21 looper letters, 362 selfloop transitions, 446 changer transitions 3/812 dead transitions. [2024-06-27 17:03:09,182 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 335 places, 812 transitions, 16982 flow [2024-06-27 17:03:09,182 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2024-06-27 17:03:09,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2024-06-27 17:03:09,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 222 transitions. [2024-06-27 17:03:09,190 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4228571428571429 [2024-06-27 17:03:09,190 INFO L175 Difference]: Start difference. First operand has 314 places, 728 transitions, 13966 flow. Second operand 25 states and 222 transitions. [2024-06-27 17:03:09,190 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 335 places, 812 transitions, 16982 flow [2024-06-27 17:03:10,203 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 322 places, 812 transitions, 16423 flow, removed 253 selfloop flow, removed 13 redundant places. [2024-06-27 17:03:10,220 INFO L231 Difference]: Finished difference. Result has 328 places, 729 transitions, 14625 flow [2024-06-27 17:03:10,220 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=13320, PETRI_DIFFERENCE_MINUEND_PLACES=298, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=721, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=437, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=282, PETRI_DIFFERENCE_SUBTRAHEND_STATES=25, PETRI_FLOW=14625, PETRI_PLACES=328, PETRI_TRANSITIONS=729} [2024-06-27 17:03:10,221 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 305 predicate places. [2024-06-27 17:03:10,221 INFO L495 AbstractCegarLoop]: Abstraction has has 328 places, 729 transitions, 14625 flow [2024-06-27 17:03:10,221 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 5.3) internal successors, (106), 20 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:03:10,221 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:03:10,221 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 17:03:10,260 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2024-06-27 17:03:10,422 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 17:03:10,422 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 17:03:10,422 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:03:10,422 INFO L85 PathProgramCache]: Analyzing trace with hash -947772703, now seen corresponding path program 10 times [2024-06-27 17:03:10,423 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:03:10,423 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1323456005] [2024-06-27 17:03:10,423 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:03:10,423 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:03:10,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:03:10,559 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 17:03:10,560 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:03:10,561 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1323456005] [2024-06-27 17:03:10,562 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1323456005] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 17:03:10,563 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [619190066] [2024-06-27 17:03:10,563 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-06-27 17:03:10,563 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 17:03:10,563 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 17:03:10,564 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 17:03:10,567 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 17:03:10,601 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-06-27 17:03:10,601 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 17:03:10,602 INFO L262 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 6 conjunts are in the unsatisfiable core [2024-06-27 17:03:10,603 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 17:03:10,692 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:03:10,692 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 17:03:10,767 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 17:03:10,767 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [619190066] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 17:03:10,767 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 17:03:10,768 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 7] total 18 [2024-06-27 17:03:10,768 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [54532896] [2024-06-27 17:03:10,768 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 17:03:10,768 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-06-27 17:03:10,769 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:03:10,769 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-06-27 17:03:10,769 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=240, Unknown=0, NotChecked=0, Total=306 [2024-06-27 17:03:10,779 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 21 [2024-06-27 17:03:10,779 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 328 places, 729 transitions, 14625 flow. Second operand has 18 states, 18 states have (on average 5.611111111111111) internal successors, (101), 18 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:03:10,780 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:03:10,780 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 21 [2024-06-27 17:03:10,780 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:03:13,245 INFO L124 PetriNetUnfolderBase]: 3832/6404 cut-off events. [2024-06-27 17:03:13,245 INFO L125 PetriNetUnfolderBase]: For 271595/271595 co-relation queries the response was YES. [2024-06-27 17:03:13,296 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65481 conditions, 6404 events. 3832/6404 cut-off events. For 271595/271595 co-relation queries the response was YES. Maximal size of possible extension queue 279. Compared 38079 event pairs, 35 based on Foata normal form. 73/6477 useless extension candidates. Maximal degree in co-relation 64376. Up to 1682 conditions per place. [2024-06-27 17:03:13,343 INFO L140 encePairwiseOnDemand]: 11/21 looper letters, 452 selfloop transitions, 733 changer transitions 10/1196 dead transitions. [2024-06-27 17:03:13,344 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 363 places, 1196 transitions, 26420 flow [2024-06-27 17:03:13,345 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2024-06-27 17:03:13,345 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2024-06-27 17:03:13,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 317 transitions. [2024-06-27 17:03:13,346 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39724310776942356 [2024-06-27 17:03:13,346 INFO L175 Difference]: Start difference. First operand has 328 places, 729 transitions, 14625 flow. Second operand 38 states and 317 transitions. [2024-06-27 17:03:13,346 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 363 places, 1196 transitions, 26420 flow [2024-06-27 17:03:14,805 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 340 places, 1196 transitions, 25258 flow, removed 69 selfloop flow, removed 23 redundant places. [2024-06-27 17:03:14,824 INFO L231 Difference]: Finished difference. Result has 350 places, 1001 transitions, 22395 flow [2024-06-27 17:03:14,825 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=13879, PETRI_DIFFERENCE_MINUEND_PLACES=303, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=729, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=466, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=172, PETRI_DIFFERENCE_SUBTRAHEND_STATES=38, PETRI_FLOW=22395, PETRI_PLACES=350, PETRI_TRANSITIONS=1001} [2024-06-27 17:03:14,827 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 327 predicate places. [2024-06-27 17:03:14,827 INFO L495 AbstractCegarLoop]: Abstraction has has 350 places, 1001 transitions, 22395 flow [2024-06-27 17:03:14,828 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 5.611111111111111) internal successors, (101), 18 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:03:14,828 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:03:14,828 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 17:03:14,839 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2024-06-27 17:03:15,030 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 17:03:15,030 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 17:03:15,030 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:03:15,030 INFO L85 PathProgramCache]: Analyzing trace with hash -237964925, now seen corresponding path program 11 times [2024-06-27 17:03:15,030 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:03:15,031 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [709158464] [2024-06-27 17:03:15,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:03:15,031 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:03:15,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:03:15,167 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:03:15,171 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:03:15,171 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [709158464] [2024-06-27 17:03:15,171 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [709158464] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 17:03:15,171 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [677440954] [2024-06-27 17:03:15,171 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-06-27 17:03:15,172 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 17:03:15,172 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 17:03:15,172 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 17:03:15,173 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 17:03:15,230 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2024-06-27 17:03:15,230 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 17:03:15,231 INFO L262 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 8 conjunts are in the unsatisfiable core [2024-06-27 17:03:15,232 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 17:03:15,338 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:03:15,338 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 17:03:15,438 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:03:15,438 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [677440954] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 17:03:15,438 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 17:03:15,438 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 21 [2024-06-27 17:03:15,438 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [111197072] [2024-06-27 17:03:15,439 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 17:03:15,439 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-06-27 17:03:15,439 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:03:15,440 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-06-27 17:03:15,440 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=320, Unknown=0, NotChecked=0, Total=420 [2024-06-27 17:03:15,445 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 21 [2024-06-27 17:03:15,445 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 350 places, 1001 transitions, 22395 flow. Second operand has 21 states, 21 states have (on average 5.238095238095238) internal successors, (110), 21 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:03:15,445 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:03:15,445 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 21 [2024-06-27 17:03:15,445 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:03:18,087 INFO L124 PetriNetUnfolderBase]: 4131/6841 cut-off events. [2024-06-27 17:03:18,087 INFO L125 PetriNetUnfolderBase]: For 299173/299173 co-relation queries the response was YES. [2024-06-27 17:03:18,131 INFO L83 FinitePrefix]: Finished finitePrefix Result has 73590 conditions, 6841 events. 4131/6841 cut-off events. For 299173/299173 co-relation queries the response was YES. Maximal size of possible extension queue 300. Compared 40969 event pairs, 95 based on Foata normal form. 18/6859 useless extension candidates. Maximal degree in co-relation 72923. Up to 1457 conditions per place. [2024-06-27 17:03:18,168 INFO L140 encePairwiseOnDemand]: 12/21 looper letters, 605 selfloop transitions, 574 changer transitions 4/1184 dead transitions. [2024-06-27 17:03:18,168 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 368 places, 1184 transitions, 28521 flow [2024-06-27 17:03:18,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2024-06-27 17:03:18,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2024-06-27 17:03:18,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 165 transitions. [2024-06-27 17:03:18,169 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41353383458646614 [2024-06-27 17:03:18,169 INFO L175 Difference]: Start difference. First operand has 350 places, 1001 transitions, 22395 flow. Second operand 19 states and 165 transitions. [2024-06-27 17:03:18,170 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 368 places, 1184 transitions, 28521 flow [2024-06-27 17:03:20,332 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 349 places, 1184 transitions, 28011 flow, removed 120 selfloop flow, removed 19 redundant places. [2024-06-27 17:03:20,357 INFO L231 Difference]: Finished difference. Result has 355 places, 1066 transitions, 25167 flow [2024-06-27 17:03:20,358 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=21970, PETRI_DIFFERENCE_MINUEND_PLACES=331, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1001, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=512, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=464, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=25167, PETRI_PLACES=355, PETRI_TRANSITIONS=1066} [2024-06-27 17:03:20,358 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 332 predicate places. [2024-06-27 17:03:20,358 INFO L495 AbstractCegarLoop]: Abstraction has has 355 places, 1066 transitions, 25167 flow [2024-06-27 17:03:20,359 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 5.238095238095238) internal successors, (110), 21 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:03:20,359 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:03:20,359 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 17:03:20,370 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2024-06-27 17:03:20,559 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 17:03:20,560 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 17:03:20,560 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:03:20,560 INFO L85 PathProgramCache]: Analyzing trace with hash -1955116159, now seen corresponding path program 12 times [2024-06-27 17:03:20,560 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:03:20,560 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1547228077] [2024-06-27 17:03:20,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:03:20,561 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:03:20,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:03:20,671 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:03:20,672 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:03:20,672 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1547228077] [2024-06-27 17:03:20,672 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1547228077] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 17:03:20,672 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1106889368] [2024-06-27 17:03:20,672 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-06-27 17:03:20,673 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 17:03:20,673 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 17:03:20,674 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 17:03:20,695 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 17:03:20,720 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2024-06-27 17:03:20,720 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 17:03:20,721 INFO L262 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 8 conjunts are in the unsatisfiable core [2024-06-27 17:03:20,722 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 17:03:20,829 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:03:20,829 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 17:03:20,927 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:03:20,927 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1106889368] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 17:03:20,927 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 17:03:20,928 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 21 [2024-06-27 17:03:20,928 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1057422701] [2024-06-27 17:03:20,928 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 17:03:20,928 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-06-27 17:03:20,929 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:03:20,929 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-06-27 17:03:20,929 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=325, Unknown=0, NotChecked=0, Total=420 [2024-06-27 17:03:20,932 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 21 [2024-06-27 17:03:20,933 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 355 places, 1066 transitions, 25167 flow. Second operand has 21 states, 21 states have (on average 5.238095238095238) internal successors, (110), 21 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:03:20,933 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:03:20,933 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 21 [2024-06-27 17:03:20,933 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:03:24,004 INFO L124 PetriNetUnfolderBase]: 4684/7732 cut-off events. [2024-06-27 17:03:24,004 INFO L125 PetriNetUnfolderBase]: For 353251/353251 co-relation queries the response was YES. [2024-06-27 17:03:24,060 INFO L83 FinitePrefix]: Finished finitePrefix Result has 84888 conditions, 7732 events. 4684/7732 cut-off events. For 353251/353251 co-relation queries the response was YES. Maximal size of possible extension queue 342. Compared 47523 event pairs, 193 based on Foata normal form. 32/7764 useless extension candidates. Maximal degree in co-relation 84017. Up to 6181 conditions per place. [2024-06-27 17:03:24,096 INFO L140 encePairwiseOnDemand]: 12/21 looper letters, 1120 selfloop transitions, 165 changer transitions 2/1288 dead transitions. [2024-06-27 17:03:24,096 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 372 places, 1288 transitions, 32014 flow [2024-06-27 17:03:24,096 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2024-06-27 17:03:24,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2024-06-27 17:03:24,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 176 transitions. [2024-06-27 17:03:24,097 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41904761904761906 [2024-06-27 17:03:24,097 INFO L175 Difference]: Start difference. First operand has 355 places, 1066 transitions, 25167 flow. Second operand 20 states and 176 transitions. [2024-06-27 17:03:24,097 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 372 places, 1288 transitions, 32014 flow [2024-06-27 17:03:26,801 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 362 places, 1288 transitions, 31739 flow, removed 46 selfloop flow, removed 10 redundant places. [2024-06-27 17:03:26,823 INFO L231 Difference]: Finished difference. Result has 370 places, 1162 transitions, 27535 flow [2024-06-27 17:03:26,824 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=24894, PETRI_DIFFERENCE_MINUEND_PLACES=343, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1066, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=95, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=961, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=27535, PETRI_PLACES=370, PETRI_TRANSITIONS=1162} [2024-06-27 17:03:26,824 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 347 predicate places. [2024-06-27 17:03:26,824 INFO L495 AbstractCegarLoop]: Abstraction has has 370 places, 1162 transitions, 27535 flow [2024-06-27 17:03:26,824 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 5.238095238095238) internal successors, (110), 21 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:03:26,824 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:03:26,824 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 17:03:26,835 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 17:03:27,025 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 17:03:27,025 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 17:03:27,026 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:03:27,026 INFO L85 PathProgramCache]: Analyzing trace with hash 470355489, now seen corresponding path program 13 times [2024-06-27 17:03:27,026 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:03:27,026 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2025807099] [2024-06-27 17:03:27,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:03:27,027 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:03:27,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:03:27,135 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:03:27,135 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:03:27,136 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2025807099] [2024-06-27 17:03:27,136 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2025807099] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 17:03:27,136 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [983564758] [2024-06-27 17:03:27,136 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-06-27 17:03:27,136 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 17:03:27,136 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 17:03:27,138 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 17:03:27,158 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 17:03:27,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:03:27,182 INFO L262 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 9 conjunts are in the unsatisfiable core [2024-06-27 17:03:27,183 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 17:03:27,296 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:03:27,296 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 17:03:27,396 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:03:27,397 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [983564758] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 17:03:27,397 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 17:03:27,397 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 8] total 23 [2024-06-27 17:03:27,397 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [739347607] [2024-06-27 17:03:27,397 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 17:03:27,397 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2024-06-27 17:03:27,398 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:03:27,398 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2024-06-27 17:03:27,398 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=381, Unknown=0, NotChecked=0, Total=506 [2024-06-27 17:03:27,411 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 21 [2024-06-27 17:03:27,412 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 370 places, 1162 transitions, 27535 flow. Second operand has 23 states, 23 states have (on average 5.217391304347826) internal successors, (120), 23 states have internal predecessors, (120), 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 17:03:27,412 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:03:27,412 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 21 [2024-06-27 17:03:27,412 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:03:30,760 INFO L124 PetriNetUnfolderBase]: 4904/8120 cut-off events. [2024-06-27 17:03:30,760 INFO L125 PetriNetUnfolderBase]: For 422256/422256 co-relation queries the response was YES. [2024-06-27 17:03:30,825 INFO L83 FinitePrefix]: Finished finitePrefix Result has 91667 conditions, 8120 events. 4904/8120 cut-off events. For 422256/422256 co-relation queries the response was YES. Maximal size of possible extension queue 365. Compared 50641 event pairs, 50 based on Foata normal form. 139/8259 useless extension candidates. Maximal degree in co-relation 91387. Up to 3923 conditions per place. [2024-06-27 17:03:30,869 INFO L140 encePairwiseOnDemand]: 11/21 looper letters, 727 selfloop transitions, 675 changer transitions 5/1408 dead transitions. [2024-06-27 17:03:30,870 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 395 places, 1408 transitions, 35134 flow [2024-06-27 17:03:30,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2024-06-27 17:03:30,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2024-06-27 17:03:30,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 232 transitions. [2024-06-27 17:03:30,871 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4249084249084249 [2024-06-27 17:03:30,871 INFO L175 Difference]: Start difference. First operand has 370 places, 1162 transitions, 27535 flow. Second operand 26 states and 232 transitions. [2024-06-27 17:03:30,871 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 395 places, 1408 transitions, 35134 flow [2024-06-27 17:03:34,231 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 389 places, 1408 transitions, 34788 flow, removed 153 selfloop flow, removed 6 redundant places. [2024-06-27 17:03:34,264 INFO L231 Difference]: Finished difference. Result has 403 places, 1235 transitions, 31779 flow [2024-06-27 17:03:34,265 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=26971, PETRI_DIFFERENCE_MINUEND_PLACES=364, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1152, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=597, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=527, PETRI_DIFFERENCE_SUBTRAHEND_STATES=26, PETRI_FLOW=31779, PETRI_PLACES=403, PETRI_TRANSITIONS=1235} [2024-06-27 17:03:34,266 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 380 predicate places. [2024-06-27 17:03:34,266 INFO L495 AbstractCegarLoop]: Abstraction has has 403 places, 1235 transitions, 31779 flow [2024-06-27 17:03:34,266 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 5.217391304347826) internal successors, (120), 23 states have internal predecessors, (120), 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 17:03:34,267 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:03:34,267 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 17:03:34,283 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2024-06-27 17:03:34,480 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 17:03:34,480 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 17:03:34,481 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:03:34,481 INFO L85 PathProgramCache]: Analyzing trace with hash 1003331741, now seen corresponding path program 14 times [2024-06-27 17:03:34,481 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:03:34,481 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1127572794] [2024-06-27 17:03:34,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:03:34,481 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:03:34,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:03:34,585 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:03:34,585 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:03:34,585 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1127572794] [2024-06-27 17:03:34,586 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1127572794] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 17:03:34,586 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [934086857] [2024-06-27 17:03:34,586 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-06-27 17:03:34,586 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 17:03:34,586 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 17:03:34,587 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 17:03:34,589 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 17:03:34,628 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-06-27 17:03:34,629 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 17:03:34,630 INFO L262 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 8 conjunts are in the unsatisfiable core [2024-06-27 17:03:34,631 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 17:03:34,736 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:03:34,736 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 17:03:34,818 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:03:34,819 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [934086857] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 17:03:34,819 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 17:03:34,819 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 19 [2024-06-27 17:03:34,819 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1846761829] [2024-06-27 17:03:34,819 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 17:03:34,819 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-06-27 17:03:34,819 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:03:34,820 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-06-27 17:03:34,820 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=248, Unknown=0, NotChecked=0, Total=342 [2024-06-27 17:03:34,822 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 21 [2024-06-27 17:03:34,822 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 403 places, 1235 transitions, 31779 flow. Second operand has 19 states, 19 states have (on average 5.421052631578948) internal successors, (103), 19 states have internal predecessors, (103), 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 17:03:34,822 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:03:34,822 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 21 [2024-06-27 17:03:34,822 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:03:38,185 INFO L124 PetriNetUnfolderBase]: 5010/8266 cut-off events. [2024-06-27 17:03:38,185 INFO L125 PetriNetUnfolderBase]: For 518062/518062 co-relation queries the response was YES. [2024-06-27 17:03:38,257 INFO L83 FinitePrefix]: Finished finitePrefix Result has 100129 conditions, 8266 events. 5010/8266 cut-off events. For 518062/518062 co-relation queries the response was YES. Maximal size of possible extension queue 359. Compared 51107 event pairs, 227 based on Foata normal form. 8/8274 useless extension candidates. Maximal degree in co-relation 99371. Up to 7052 conditions per place. [2024-06-27 17:03:38,302 INFO L140 encePairwiseOnDemand]: 12/21 looper letters, 1185 selfloop transitions, 155 changer transitions 2/1343 dead transitions. [2024-06-27 17:03:38,303 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 416 places, 1343 transitions, 37079 flow [2024-06-27 17:03:38,303 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-06-27 17:03:38,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2024-06-27 17:03:38,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 131 transitions. [2024-06-27 17:03:38,304 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4158730158730159 [2024-06-27 17:03:38,304 INFO L175 Difference]: Start difference. First operand has 403 places, 1235 transitions, 31779 flow. Second operand 15 states and 131 transitions. [2024-06-27 17:03:38,304 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 416 places, 1343 transitions, 37079 flow [2024-06-27 17:03:42,220 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 409 places, 1343 transitions, 36534 flow, removed 228 selfloop flow, removed 7 redundant places. [2024-06-27 17:03:42,248 INFO L231 Difference]: Finished difference. Result has 414 places, 1275 transitions, 32934 flow [2024-06-27 17:03:42,250 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=31335, PETRI_DIFFERENCE_MINUEND_PLACES=395, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1232, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=114, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1086, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=32934, PETRI_PLACES=414, PETRI_TRANSITIONS=1275} [2024-06-27 17:03:42,250 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 391 predicate places. [2024-06-27 17:03:42,251 INFO L495 AbstractCegarLoop]: Abstraction has has 414 places, 1275 transitions, 32934 flow [2024-06-27 17:03:42,251 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 5.421052631578948) internal successors, (103), 19 states have internal predecessors, (103), 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 17:03:42,251 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:03:42,251 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 17:03:42,266 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2024-06-27 17:03:42,466 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 17:03:42,466 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 17:03:42,466 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:03:42,466 INFO L85 PathProgramCache]: Analyzing trace with hash 247132817, now seen corresponding path program 15 times [2024-06-27 17:03:42,467 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:03:42,467 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [360287095] [2024-06-27 17:03:42,467 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:03:42,467 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:03:42,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:03:42,573 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:03:42,573 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:03:42,573 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [360287095] [2024-06-27 17:03:42,574 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [360287095] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 17:03:42,574 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1334094157] [2024-06-27 17:03:42,574 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-06-27 17:03:42,574 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 17:03:42,574 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 17:03:42,575 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 17:03:42,600 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 17:03:42,655 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-06-27 17:03:42,655 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 17:03:42,656 INFO L262 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 8 conjunts are in the unsatisfiable core [2024-06-27 17:03:42,657 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 17:03:42,754 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:03:42,754 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 17:03:42,835 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-06-27 17:03:42,835 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1334094157] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 17:03:42,835 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 17:03:42,835 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 19 [2024-06-27 17:03:42,835 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1877247613] [2024-06-27 17:03:42,836 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 17:03:42,836 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-06-27 17:03:42,836 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:03:42,837 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-06-27 17:03:42,837 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=253, Unknown=0, NotChecked=0, Total=342 [2024-06-27 17:03:42,841 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 21 [2024-06-27 17:03:42,841 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 414 places, 1275 transitions, 32934 flow. Second operand has 19 states, 19 states have (on average 5.421052631578948) internal successors, (103), 19 states have internal predecessors, (103), 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 17:03:42,841 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:03:42,841 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 21 [2024-06-27 17:03:42,842 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:03:46,550 INFO L124 PetriNetUnfolderBase]: 5331/8806 cut-off events. [2024-06-27 17:03:46,550 INFO L125 PetriNetUnfolderBase]: For 526647/526647 co-relation queries the response was YES. [2024-06-27 17:03:46,623 INFO L83 FinitePrefix]: Finished finitePrefix Result has 106615 conditions, 8806 events. 5331/8806 cut-off events. For 526647/526647 co-relation queries the response was YES. Maximal size of possible extension queue 384. Compared 55152 event pairs, 61 based on Foata normal form. 75/8881 useless extension candidates. Maximal degree in co-relation 105959. Up to 3774 conditions per place. [2024-06-27 17:03:46,668 INFO L140 encePairwiseOnDemand]: 11/21 looper letters, 712 selfloop transitions, 784 changer transitions 1/1498 dead transitions. [2024-06-27 17:03:46,668 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 435 places, 1498 transitions, 40465 flow [2024-06-27 17:03:46,668 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2024-06-27 17:03:46,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2024-06-27 17:03:46,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 213 transitions. [2024-06-27 17:03:46,669 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4057142857142857 [2024-06-27 17:03:46,669 INFO L175 Difference]: Start difference. First operand has 414 places, 1275 transitions, 32934 flow. Second operand 25 states and 213 transitions. [2024-06-27 17:03:46,669 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 435 places, 1498 transitions, 40465 flow [2024-06-27 17:03:51,027 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 424 places, 1498 transitions, 40253 flow, removed 54 selfloop flow, removed 11 redundant places. [2024-06-27 17:03:51,056 INFO L231 Difference]: Finished difference. Result has 433 places, 1344 transitions, 37615 flow [2024-06-27 17:03:51,057 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=32638, PETRI_DIFFERENCE_MINUEND_PLACES=400, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1269, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=719, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=525, PETRI_DIFFERENCE_SUBTRAHEND_STATES=25, PETRI_FLOW=37615, PETRI_PLACES=433, PETRI_TRANSITIONS=1344} [2024-06-27 17:03:51,058 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 410 predicate places. [2024-06-27 17:03:51,058 INFO L495 AbstractCegarLoop]: Abstraction has has 433 places, 1344 transitions, 37615 flow [2024-06-27 17:03:51,058 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 5.421052631578948) internal successors, (103), 19 states have internal predecessors, (103), 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 17:03:51,058 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:03:51,059 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:03:51,071 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 17:03:51,265 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 17:03:51,266 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 17:03:51,266 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:03:51,266 INFO L85 PathProgramCache]: Analyzing trace with hash 843433417, now seen corresponding path program 16 times [2024-06-27 17:03:51,267 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:03:51,267 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [495061350] [2024-06-27 17:03:51,267 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:03:51,267 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:03:51,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:03:51,349 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-06-27 17:03:51,350 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:03:51,350 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [495061350] [2024-06-27 17:03:51,350 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [495061350] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 17:03:51,350 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [427767147] [2024-06-27 17:03:51,350 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-06-27 17:03:51,350 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 17:03:51,351 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 17:03:51,352 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 17:03:51,371 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 17:03:51,393 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-06-27 17:03:51,393 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 17:03:51,394 INFO L262 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 14 conjunts are in the unsatisfiable core [2024-06-27 17:03:51,395 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 17:03:51,508 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:03:51,509 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 17:03:51,993 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:03:51,994 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [427767147] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 17:03:51,994 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 17:03:51,994 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 10, 11] total 21 [2024-06-27 17:03:51,994 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [776407153] [2024-06-27 17:03:51,994 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 17:03:51,995 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2024-06-27 17:03:51,995 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:03:51,996 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2024-06-27 17:03:51,996 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=342, Unknown=0, NotChecked=0, Total=462 [2024-06-27 17:03:52,023 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 21 [2024-06-27 17:03:52,023 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 433 places, 1344 transitions, 37615 flow. Second operand has 22 states, 22 states have (on average 5.545454545454546) internal successors, (122), 22 states have internal predecessors, (122), 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 17:03:52,023 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:03:52,024 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 21 [2024-06-27 17:03:52,024 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:04:11,525 INFO L124 PetriNetUnfolderBase]: 22741/37173 cut-off events. [2024-06-27 17:04:11,525 INFO L125 PetriNetUnfolderBase]: For 2741039/2741039 co-relation queries the response was YES. [2024-06-27 17:04:12,398 INFO L83 FinitePrefix]: Finished finitePrefix Result has 488443 conditions, 37173 events. 22741/37173 cut-off events. For 2741039/2741039 co-relation queries the response was YES. Maximal size of possible extension queue 979. Compared 278322 event pairs, 201 based on Foata normal form. 2/37175 useless extension candidates. Maximal degree in co-relation 484814. Up to 7033 conditions per place. [2024-06-27 17:04:12,918 INFO L140 encePairwiseOnDemand]: 10/21 looper letters, 2216 selfloop transitions, 4720 changer transitions 348/7285 dead transitions. [2024-06-27 17:04:12,918 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 499 places, 7285 transitions, 220846 flow [2024-06-27 17:04:12,918 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2024-06-27 17:04:12,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2024-06-27 17:04:12,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 629 transitions. [2024-06-27 17:04:12,920 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44047619047619047 [2024-06-27 17:04:12,920 INFO L175 Difference]: Start difference. First operand has 433 places, 1344 transitions, 37615 flow. Second operand 68 states and 629 transitions. [2024-06-27 17:04:12,920 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 499 places, 7285 transitions, 220846 flow